path: root/package/openjdk7/patches/openadk.patch

diff -Nur icedtea-2.4.7.orig/Makefile.in icedtea-2.4.7/Makefile.in
--- icedtea-2.4.7.orig/Makefile.in	2014-04-16 06:20:44.689988653 +0200
+++ icedtea-2.4.7/Makefile.in	2014-05-01 13:34:58.421434811 +0200
@@ -712,7 +712,7 @@
 	$(am__append_14) $(am__append_15) $(DISTRIBUTION_PATCHES)
 
 # Bootstrapping patches
-ICEDTEA_BOOT_PATCHES = patches/boot/javafiles.patch \
+ICEDTEA_BOOT_PATCHES = patches/openadk.patch patches/boot/javafiles.patch \
 	patches/boot/ant-javac.patch patches/boot/corba-idlj.patch \
 	patches/boot/corba-no-gen.patch patches/boot/corba-orb.patch \
 	patches/boot/demos.patch patches/boot/fphexconstants.patch \
diff -Nur icedtea-2.4.7.orig/patches/openadk.patch icedtea-2.4.7/patches/openadk.patch
--- icedtea-2.4.7.orig/patches/openadk.patch	1970-01-01 01:00:00.000000000 +0100
+++ icedtea-2.4.7/patches/openadk.patch	2014-05-15 15:52:54.503242117 +0200
@@ -0,0 +1,7020 @@
+diff -Nur openjdk.orig/hotspot/make/linux/makefiles/zeroshark.make openjdk/hotspot/make/linux/makefiles/zeroshark.make
+--- openjdk.orig/hotspot/make/linux/makefiles/zeroshark.make	2014-02-20 19:51:45.000000000 +0100
++++ openjdk/hotspot/make/linux/makefiles/zeroshark.make	2014-05-13 16:56:38.917714592 +0200
+@@ -39,20 +39,20 @@
+ 
+ offsets_arm.s:	mkoffsets
+ 	@echo Generating assembler offsets
+-	./mkoffsets > $@
++	$(QEMU) ./mkoffsets > $@
+ 
+ bytecodes_arm.s: bytecodes_arm.def mkbc
+ 	@echo Generating ARM assembler bytecode sequences
+-	$(CXX_COMPILE) -E -x c++ - < $< | ./mkbc - $@ $(COMPILE_DONE)
++	$(CXX_COMPILE) -E -x c++ - < $< | $(QEMU) ./mkbc - $@ $(COMPILE_DONE)
+ 
+ mkbc:	$(GAMMADIR)/tools/mkbc.c
+ 	@echo Compiling mkbc tool
+-	$(CC_COMPILE) -o $@ $< $(COMPILE_DONE)
++	$(CC_COMPILE) -static -o $@ $< $(COMPILE_DONE)
+ 
+ mkoffsets:	asm_helper.cpp
+ 	@echo Compiling offset generator
+ 	$(QUIETLY) $(REMOVE_TARGET)
+-	$(CXX_COMPILE) -DSTATIC_OFFSETS -o $@ $< $(COMPILE_DONE)
++	$(CXX_COMPILE) -static -DSTATIC_OFFSETS -o $@ $< $(COMPILE_DONE)
+ 
+ endif
+ endif
+diff -Nur openjdk.orig/hotspot/src/os/linux/vm/os_linux.cpp openjdk/hotspot/src/os/linux/vm/os_linux.cpp
+--- openjdk.orig/hotspot/src/os/linux/vm/os_linux.cpp	2014-02-20 19:51:45.000000000 +0100
++++ openjdk/hotspot/src/os/linux/vm/os_linux.cpp	2014-05-13 16:14:56.637091447 +0200
+@@ -112,7 +112,6 @@
+ # include <string.h>
+ # include <syscall.h>
+ # include <sys/sysinfo.h>
+-# include <gnu/libc-version.h>
+ # include <sys/ipc.h>
+ # include <sys/shm.h>
+ # include <link.h>
+@@ -650,9 +649,7 @@
+      os::Linux::set_glibc_version(str);
+   } else {
+      // _CS_GNU_LIBC_VERSION is not supported, try gnu_get_libc_version()
+-     static char _gnu_libc_version[32];
+-     jio_snprintf(_gnu_libc_version, sizeof(_gnu_libc_version),
+-              "glibc %s %s", gnu_get_libc_version(), gnu_get_libc_release());
++     static char _gnu_libc_version[32] = "2.9";
+      os::Linux::set_glibc_version(_gnu_libc_version);
+   }
+ 
+@@ -2951,10 +2948,7 @@
+ // If we are running with earlier version, which did not have symbol versions,
+ // we should use the base version.
+ void* os::Linux::libnuma_dlsym(void* handle, const char *name) {
+-  void *f = dlvsym(handle, name, "libnuma_1.1");
+-  if (f == NULL) {
+-    f = dlsym(handle, name);
+-  }
++  void *f = dlsym(handle, name);
+   return f;
+ }
+ 
+@@ -5329,7 +5323,21 @@
+ // Linux doesn't yet have a (official) notion of processor sets,
+ // so just return the system wide load average.
+ int os::loadavg(double loadavg[], int nelem) {
+-  return ::getloadavg(loadavg, nelem);
++ FILE *LOADAVG;
++ double avg[3] = { 0.0, 0.0, 0.0 };
++ int i, res = -1;;
++
++ if ((LOADAVG = fopen("/proc/loadavg", "r"))) {
++ fscanf(LOADAVG, "%lf %lf %lf", &avg[0], &avg[1], &avg[2]);
++ res = 0;
++ fclose(LOADAVG);
++ }
++
++ for (i = 0; (i < nelem) && (i < 3); i++) {
++ loadavg[i] = avg[i];
++ }
++
++ return res;
+ }
+ 
+ void os::pause() {
+diff -Nur openjdk.orig/hotspot/src/os/linux/vm/os_linux.cpp.orig openjdk/hotspot/src/os/linux/vm/os_linux.cpp.orig
+--- openjdk.orig/hotspot/src/os/linux/vm/os_linux.cpp.orig	1970-01-01 01:00:00.000000000 +0100
++++ openjdk/hotspot/src/os/linux/vm/os_linux.cpp.orig	2014-02-20 19:51:45.000000000 +0100
+@@ -0,0 +1,5989 @@
++/*
++ * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
++ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
++ *
++ * This code is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 only, as
++ * published by the Free Software Foundation.
++ *
++ * This code is distributed in the hope that it will be useful, but WITHOUT
++ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
++ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
++ * version 2 for more details (a copy is included in the LICENSE file that
++ * accompanied this code).
++ *
++ * You should have received a copy of the GNU General Public License version
++ * 2 along with this work; if not, write to the Free Software Foundation,
++ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
++ *
++ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
++ * or visit www.oracle.com if you need additional information or have any
++ * questions.
++ *
++ */
++
++// no precompiled headers
++#include "classfile/classLoader.hpp"
++#include "classfile/systemDictionary.hpp"
++#include "classfile/vmSymbols.hpp"
++#include "code/icBuffer.hpp"
++#include "code/vtableStubs.hpp"
++#include "compiler/compileBroker.hpp"
++#include "interpreter/interpreter.hpp"
++#include "jvm_linux.h"
++#include "memory/allocation.inline.hpp"
++#include "memory/filemap.hpp"
++#include "mutex_linux.inline.hpp"
++#include "oops/oop.inline.hpp"
++#include "os_share_linux.hpp"
++#include "prims/jniFastGetField.hpp"
++#include "prims/jvm.h"
++#include "prims/jvm_misc.hpp"
++#include "runtime/arguments.hpp"
++#include "runtime/extendedPC.hpp"
++#include "runtime/globals.hpp"
++#include "runtime/interfaceSupport.hpp"
++#include "runtime/init.hpp"
++#include "runtime/java.hpp"
++#include "runtime/javaCalls.hpp"
++#include "runtime/mutexLocker.hpp"
++#include "runtime/objectMonitor.hpp"
++#include "runtime/osThread.hpp"
++#include "runtime/perfMemory.hpp"
++#include "runtime/sharedRuntime.hpp"
++#include "runtime/statSampler.hpp"
++#include "runtime/stubRoutines.hpp"
++#include "runtime/threadCritical.hpp"
++#include "runtime/timer.hpp"
++#include "services/attachListener.hpp"
++#include "services/memTracker.hpp"
++#include "services/runtimeService.hpp"
++#include "thread_linux.inline.hpp"
++#include "utilities/decoder.hpp"
++#include "utilities/defaultStream.hpp"
++#include "utilities/events.hpp"
++#include "utilities/elfFile.hpp"
++#include "utilities/growableArray.hpp"
++#include "utilities/vmError.hpp"
++#ifdef TARGET_ARCH_x86
++# include "assembler_x86.inline.hpp"
++# include "nativeInst_x86.hpp"
++#endif
++#ifdef TARGET_ARCH_sparc
++# include "assembler_sparc.inline.hpp"
++# include "nativeInst_sparc.hpp"
++#endif
++#ifdef TARGET_ARCH_zero
++# include "assembler_zero.inline.hpp"
++# include "nativeInst_zero.hpp"
++#endif
++#ifdef TARGET_ARCH_arm
++# include "assembler_arm.inline.hpp"
++# include "nativeInst_arm.hpp"
++#endif
++#ifdef TARGET_ARCH_ppc
++# include "assembler_ppc.inline.hpp"
++# include "nativeInst_ppc.hpp"
++#endif
++
++// put OS-includes here
++# include <sys/types.h>
++# include <sys/mman.h>
++# include <sys/stat.h>
++# include <sys/select.h>
++# include <pthread.h>
++# include <signal.h>
++# include <errno.h>
++# include <dlfcn.h>
++# include <stdio.h>
++# include <unistd.h>
++# include <sys/resource.h>
++# include <pthread.h>
++# include <sys/stat.h>
++# include <sys/time.h>
++# include <sys/times.h>
++# include <sys/utsname.h>
++# include <sys/socket.h>
++# include <sys/wait.h>
++# include <pwd.h>
++# include <poll.h>
++# include <semaphore.h>
++# include <fcntl.h>
++# include <string.h>
++# include <syscall.h>
++# include <sys/sysinfo.h>
++# include <gnu/libc-version.h>
++# include <sys/ipc.h>
++# include <sys/shm.h>
++# include <link.h>
++# include <stdint.h>
++# include <inttypes.h>
++# include <sys/ioctl.h>
++
++#define MAX_PATH    (2 * K)
++
++// for timer info max values which include all bits
++#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
++
++#define LARGEPAGES_BIT (1 << 6)
++
++#ifndef EM_AARCH64
++#define EM_AARCH64	183		/* ARM AARCH64 */
++#endif
++
++////////////////////////////////////////////////////////////////////////////////
++// global variables
++julong os::Linux::_physical_memory = 0;
++
++address   os::Linux::_initial_thread_stack_bottom = NULL;
++uintptr_t os::Linux::_initial_thread_stack_size   = 0;
++
++int (*os::Linux::_clock_gettime)(clockid_t, struct timespec *) = NULL;
++int (*os::Linux::_pthread_getcpuclockid)(pthread_t, clockid_t *) = NULL;
++Mutex* os::Linux::_createThread_lock = NULL;
++pthread_t os::Linux::_main_thread;
++int os::Linux::_page_size = -1;
++const int os::Linux::_vm_default_page_size = (8 * K);
++bool os::Linux::_is_floating_stack = false;
++bool os::Linux::_is_NPTL = false;
++bool os::Linux::_supports_fast_thread_cpu_time = false;
++const char * os::Linux::_glibc_version = NULL;
++const char * os::Linux::_libpthread_version = NULL;
++
++static jlong initial_time_count=0;
++
++static int clock_tics_per_sec = 100;
++
++// For diagnostics to print a message once. see run_periodic_checks
++static sigset_t check_signal_done;
++static bool check_signals = true;;
++
++static pid_t _initial_pid = 0;
++
++/* Signal number used to suspend/resume a thread */
++
++/* do not use any signal number less than SIGSEGV, see 4355769 */
++static int SR_signum = SIGUSR2;
++sigset_t SR_sigset;
++
++/* Used to protect dlsym() calls */
++static pthread_mutex_t dl_mutex;
++
++// Declarations
++static void unpackTime(timespec* absTime, bool isAbsolute, jlong time);
++
++#ifdef JAVASE_EMBEDDED
++class MemNotifyThread: public Thread {
++  friend class VMStructs;
++ public:
++  virtual void run();
++
++ private:
++  static MemNotifyThread* _memnotify_thread;
++  int _fd;
++
++ public:
++
++  // Constructor
++  MemNotifyThread(int fd);
++
++  // Tester
++  bool is_memnotify_thread() const { return true; }
++
++  // Printing
++  char* name() const { return (char*)"Linux MemNotify Thread"; }
++
++  // Returns the single instance of the MemNotifyThread
++  static MemNotifyThread* memnotify_thread() { return _memnotify_thread; }
++
++  // Create and start the single instance of MemNotifyThread
++  static void start();
++};
++#endif // JAVASE_EMBEDDED
++
++// utility functions
++
++static int SR_initialize();
++static int SR_finalize();
++
++julong os::available_memory() {
++  return Linux::available_memory();
++}
++
++julong os::Linux::available_memory() {
++  // values in struct sysinfo are "unsigned long"
++  struct sysinfo si;
++  sysinfo(&si);
++
++  return (julong)si.freeram * si.mem_unit;
++}
++
++julong os::physical_memory() {
++  return Linux::physical_memory();
++}
++
++julong os::allocatable_physical_memory(julong size) {
++#ifdef _LP64
++  return size;
++#else
++  julong result = MIN2(size, (julong)3800*M);
++   if (!is_allocatable(result)) {
++     // See comments under solaris for alignment considerations
++     julong reasonable_size = (julong)2*G - 2 * os::vm_page_size();
++     result =  MIN2(size, reasonable_size);
++   }
++   return result;
++#endif // _LP64
++}
++
++////////////////////////////////////////////////////////////////////////////////
++// environment support
++
++bool os::getenv(const char* name, char* buf, int len) {
++  const char* val = ::getenv(name);
++  if (val != NULL && strlen(val) < (size_t)len) {
++    strcpy(buf, val);
++    return true;
++  }
++  if (len > 0) buf[0] = 0;  // return a null string
++  return false;
++}
++
++
++// Return true if user is running as root.
++
++bool os::have_special_privileges() {
++  static bool init = false;
++  static bool privileges = false;
++  if (!init) {
++    privileges = (getuid() != geteuid()) || (getgid() != getegid());
++    init = true;
++  }
++  return privileges;
++}
++
++
++#ifndef SYS_gettid
++// i386: 224, ia64: 1105, amd64: 186, sparc 143
++#ifdef __ia64__
++#define SYS_gettid 1105
++#elif __i386__
++#define SYS_gettid 224
++#elif __amd64__
++#define SYS_gettid 186
++#elif __sparc__
++#define SYS_gettid 143
++#else
++#error define gettid for the arch
++#endif
++#endif
++
++// Cpu architecture string
++#if   defined(ZERO)
++static char cpu_arch[] = ZERO_LIBARCH;
++#elif defined(IA64)
++static char cpu_arch[] = "ia64";
++#elif defined(IA32)
++static char cpu_arch[] = "i386";
++#elif defined(AMD64)
++static char cpu_arch[] = "amd64";
++#elif defined(ARM)
++static char cpu_arch[] = "arm";
++#elif defined(PPC)
++static char cpu_arch[] = "ppc";
++#elif defined(SPARC)
++#  ifdef _LP64
++static char cpu_arch[] = "sparcv9";
++#  else
++static char cpu_arch[] = "sparc";
++#  endif
++#else
++#error Add appropriate cpu_arch setting
++#endif
++
++
++// pid_t gettid()
++//
++// Returns the kernel thread id of the currently running thread. Kernel
++// thread id is used to access /proc.
++//
++// (Note that getpid() on LinuxThreads returns kernel thread id too; but
++// on NPTL, it returns the same pid for all threads, as required by POSIX.)
++//
++pid_t os::Linux::gettid() {
++  int rslt = syscall(SYS_gettid);
++  if (rslt == -1) {
++     // old kernel, no NPTL support
++     return getpid();
++  } else {
++     return (pid_t)rslt;
++  }
++}
++
++// Most versions of linux have a bug where the number of processors are
++// determined by looking at the /proc file system.  In a chroot environment,
++// the system call returns 1.  This causes the VM to act as if it is
++// a single processor and elide locking (see is_MP() call).
++static bool unsafe_chroot_detected = false;
++static const char *unstable_chroot_error = "/proc file system not found.\n"
++                     "Java may be unstable running multithreaded in a chroot "
++                     "environment on Linux when /proc filesystem is not mounted.";
++
++void os::Linux::initialize_system_info() {
++  set_processor_count(sysconf(_SC_NPROCESSORS_CONF));
++  if (processor_count() == 1) {
++    pid_t pid = os::Linux::gettid();
++    char fname[32];
++    jio_snprintf(fname, sizeof(fname), "/proc/%d", pid);
++    FILE *fp = fopen(fname, "r");
++    if (fp == NULL) {
++      unsafe_chroot_detected = true;
++    } else {
++      fclose(fp);
++    }
++  }
++  _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE);
++  assert(processor_count() > 0, "linux error");
++}
++
++void os::init_system_properties_values() {
++//  char arch[12];
++//  sysinfo(SI_ARCHITECTURE, arch, sizeof(arch));
++
++  // The next steps are taken in the product version:
++  //
++  // Obtain the JAVA_HOME value from the location of libjvm[_g].so.
++  // This library should be located at:
++  // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so.
++  //
++  // If "/jre/lib/" appears at the right place in the path, then we
++  // assume libjvm[_g].so is installed in a JDK and we use this path.
++  //
++  // Otherwise exit with message: "Could not create the Java virtual machine."
++  //
++  // The following extra steps are taken in the debugging version:
++  //
++  // If "/jre/lib/" does NOT appear at the right place in the path
++  // instead of exit check for $JAVA_HOME environment variable.
++  //
++  // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>,
++  // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so
++  // it looks like libjvm[_g].so is installed there
++  // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so.
++  //
++  // Otherwise exit.
++  //
++  // Important note: if the location of libjvm.so changes this
++  // code needs to be changed accordingly.
++
++  // The next few definitions allow the code to be verbatim:
++#define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n), mtInternal)
++#define getenv(n) ::getenv(n)
++
++/*
++ * See ld(1):
++ *      The linker uses the following search paths to locate required
++ *      shared libraries:
++ *        1: ...
++ *        ...
++ *        7: The default directories, normally /lib and /usr/lib.
++ */
++#if defined(AMD64) || defined(_LP64) && (defined(SPARC) || defined(PPC) || defined(S390) || defined(AARCH64))
++#define DEFAULT_LIBPATH "/usr/lib64:/lib64:/lib:/usr/lib"
++#else
++#define DEFAULT_LIBPATH "/lib:/usr/lib"
++#endif
++
++#define EXTENSIONS_DIR  "/lib/ext"
++#define ENDORSED_DIR    "/lib/endorsed"
++#define REG_DIR         "/usr/java/packages"
++
++  {
++    /* sysclasspath, java_home, dll_dir */
++    {
++        char *home_path;
++        char *dll_path;
++        char *pslash;
++        char buf[MAXPATHLEN];
++        os::jvm_path(buf, sizeof(buf));
++
++        // Found the full path to libjvm.so.
++        // Now cut the path to <java_home>/jre if we can.
++        *(strrchr(buf, '/')) = '\0';  /* get rid of /libjvm.so */
++        pslash = strrchr(buf, '/');
++        if (pslash != NULL)
++            *pslash = '\0';           /* get rid of /{client|server|hotspot} */
++        dll_path = malloc(strlen(buf) + 1);
++        if (dll_path == NULL)
++            return;
++        strcpy(dll_path, buf);
++        Arguments::set_dll_dir(dll_path);
++
++        if (pslash != NULL) {
++            pslash = strrchr(buf, '/');
++            if (pslash != NULL) {
++                *pslash = '\0';       /* get rid of /<arch> */
++                pslash = strrchr(buf, '/');
++                if (pslash != NULL)
++                    *pslash = '\0';   /* get rid of /lib */
++            }
++        }
++
++        home_path = malloc(strlen(buf) + 1);
++        if (home_path == NULL)
++            return;
++        strcpy(home_path, buf);
++        Arguments::set_java_home(home_path);
++
++        if (!set_boot_path('/', ':'))
++            return;
++    }
++
++    /*
++     * Where to look for native libraries
++     *
++     * Note: Due to a legacy implementation, most of the library path
++     * is set in the launcher.  This was to accomodate linking restrictions
++     * on legacy Linux implementations (which are no longer supported).
++     * Eventually, all the library path setting will be done here.
++     *
++     * However, to prevent the proliferation of improperly built native
++     * libraries, the new path component /usr/java/packages is added here.
++     * Eventually, all the library path setting will be done here.
++     */
++    {
++        char *ld_library_path;
++
++        /*
++         * Construct the invariant part of ld_library_path. Note that the
++         * space for the colon and the trailing null are provided by the
++         * nulls included by the sizeof operator (so actually we allocate
++         * a byte more than necessary).
++         */
++        ld_library_path = (char *) malloc(sizeof(REG_DIR) + sizeof("/lib/") +
++            strlen(cpu_arch) + sizeof(DEFAULT_LIBPATH));
++        sprintf(ld_library_path, REG_DIR "/lib/%s:" DEFAULT_LIBPATH, cpu_arch);
++
++        /*
++         * Get the user setting of LD_LIBRARY_PATH, and prepended it.  It
++         * should always exist (until the legacy problem cited above is
++         * addressed).
++         */
++        char *v = getenv("LD_LIBRARY_PATH");
++        if (v != NULL) {
++            char *t = ld_library_path;
++            /* That's +1 for the colon and +1 for the trailing '\0' */
++            ld_library_path = (char *) malloc(strlen(v) + 1 + strlen(t) + 1);
++            sprintf(ld_library_path, "%s:%s", v, t);
++        }
++        Arguments::set_library_path(ld_library_path);
++    }
++
++    /*
++     * Extensions directories.
++     *
++     * Note that the space for the colon and the trailing null are provided
++     * by the nulls included by the sizeof operator (so actually one byte more
++     * than necessary is allocated).
++     */
++    {
++        char *buf = malloc(strlen(Arguments::get_java_home()) +
++            sizeof(EXTENSIONS_DIR) + sizeof(REG_DIR) + sizeof(EXTENSIONS_DIR));
++        sprintf(buf, "%s" EXTENSIONS_DIR ":" REG_DIR EXTENSIONS_DIR,
++            Arguments::get_java_home());
++        Arguments::set_ext_dirs(buf);
++    }
++
++    /* Endorsed standards default directory. */
++    {
++        char * buf;
++        buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR));
++        sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home());
++        Arguments::set_endorsed_dirs(buf);
++    }
++  }
++
++#undef malloc
++#undef getenv
++#undef EXTENSIONS_DIR
++#undef ENDORSED_DIR
++
++  // Done
++  return;
++}
++
++////////////////////////////////////////////////////////////////////////////////
++// breakpoint support
++
++void os::breakpoint() {
++  BREAKPOINT;
++}
++
++extern "C" void breakpoint() {
++  // use debugger to set breakpoint here
++}
++
++////////////////////////////////////////////////////////////////////////////////
++// signal support
++
++debug_only(static bool signal_sets_initialized = false);
++static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs;
++
++bool os::Linux::is_sig_ignored(int sig) {
++      struct sigaction oact;
++      sigaction(sig, (struct sigaction*)NULL, &oact);
++      void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*,  oact.sa_sigaction)
++                                     : CAST_FROM_FN_PTR(void*,  oact.sa_handler);
++      if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN))
++           return true;
++      else
++           return false;
++}
++
++void os::Linux::signal_sets_init() {
++  // Should also have an assertion stating we are still single-threaded.
++  assert(!signal_sets_initialized, "Already initialized");
++  // Fill in signals that are necessarily unblocked for all threads in
++  // the VM. Currently, we unblock the following signals:
++  // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden
++  //                         by -Xrs (=ReduceSignalUsage));
++  // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all
++  // other threads. The "ReduceSignalUsage" boolean tells us not to alter
++  // the dispositions or masks wrt these signals.
++  // Programs embedding the VM that want to use the above signals for their
++  // own purposes must, at this time, use the "-Xrs" option to prevent
++  // interference with shutdown hooks and BREAK_SIGNAL thread dumping.
++  // (See bug 4345157, and other related bugs).
++  // In reality, though, unblocking these signals is really a nop, since
++  // these signals are not blocked by default.
++  sigemptyset(&unblocked_sigs);
++  sigemptyset(&allowdebug_blocked_sigs);
++  sigaddset(&unblocked_sigs, SIGILL);
++  sigaddset(&unblocked_sigs, SIGSEGV);
++  sigaddset(&unblocked_sigs, SIGBUS);
++  sigaddset(&unblocked_sigs, SIGFPE);
++  sigaddset(&unblocked_sigs, SR_signum);
++
++  if (!ReduceSignalUsage) {
++   if (!os::Linux::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
++      sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
++      sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL);
++   }
++   if (!os::Linux::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
++      sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
++      sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL);
++   }
++   if (!os::Linux::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
++      sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
++      sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL);
++   }
++  }
++  // Fill in signals that are blocked by all but the VM thread.
++  sigemptyset(&vm_sigs);
++  if (!ReduceSignalUsage)
++    sigaddset(&vm_sigs, BREAK_SIGNAL);
++  debug_only(signal_sets_initialized = true);
++
++}
++
++// These are signals that are unblocked while a thread is running Java.
++// (For some reason, they get blocked by default.)
++sigset_t* os::Linux::unblocked_signals() {
++  assert(signal_sets_initialized, "Not initialized");
++  return &unblocked_sigs;
++}
++
++// These are the signals that are blocked while a (non-VM) thread is
++// running Java. Only the VM thread handles these signals.
++sigset_t* os::Linux::vm_signals() {
++  assert(signal_sets_initialized, "Not initialized");
++  return &vm_sigs;
++}
++
++// These are signals that are blocked during cond_wait to allow debugger in
++sigset_t* os::Linux::allowdebug_blocked_signals() {
++  assert(signal_sets_initialized, "Not initialized");
++  return &allowdebug_blocked_sigs;
++}
++
++void os::Linux::hotspot_sigmask(Thread* thread) {
++
++  //Save caller's signal mask before setting VM signal mask
++  sigset_t caller_sigmask;
++  pthread_sigmask(SIG_BLOCK, NULL, &caller_sigmask);
++
++  OSThread* osthread = thread->osthread();
++  osthread->set_caller_sigmask(caller_sigmask);
++
++  pthread_sigmask(SIG_UNBLOCK, os::Linux::unblocked_signals(), NULL);
++
++  if (!ReduceSignalUsage) {
++    if (thread->is_VM_thread()) {
++      // Only the VM thread handles BREAK_SIGNAL ...
++      pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL);
++    } else {
++      // ... all other threads block BREAK_SIGNAL
++      pthread_sigmask(SIG_BLOCK, vm_signals(), NULL);
++    }
++  }
++}
++
++//////////////////////////////////////////////////////////////////////////////
++// detecting pthread library
++
++void os::Linux::libpthread_init() {
++  // Save glibc and pthread version strings. Note that _CS_GNU_LIBC_VERSION
++  // and _CS_GNU_LIBPTHREAD_VERSION are supported in glibc >= 2.3.2. Use a
++  // generic name for earlier versions.
++  // Define macros here so we can build HotSpot on old systems.
++# ifndef _CS_GNU_LIBC_VERSION
++# define _CS_GNU_LIBC_VERSION 2
++# endif
++# ifndef _CS_GNU_LIBPTHREAD_VERSION
++# define _CS_GNU_LIBPTHREAD_VERSION 3
++# endif
++
++  size_t n = confstr(_CS_GNU_LIBC_VERSION, NULL, 0);
++  if (n > 0) {
++     char *str = (char *)malloc(n, mtInternal);
++     confstr(_CS_GNU_LIBC_VERSION, str, n);
++     os::Linux::set_glibc_version(str);
++  } else {
++     // _CS_GNU_LIBC_VERSION is not supported, try gnu_get_libc_version()
++     static char _gnu_libc_version[32];
++     jio_snprintf(_gnu_libc_version, sizeof(_gnu_libc_version),
++              "glibc %s %s", gnu_get_libc_version(), gnu_get_libc_release());
++     os::Linux::set_glibc_version(_gnu_libc_version);
++  }
++
++  n = confstr(_CS_GNU_LIBPTHREAD_VERSION, NULL, 0);
++  if (n > 0) {
++     char *str = (char *)malloc(n, mtInternal);
++     confstr(_CS_GNU_LIBPTHREAD_VERSION, str, n);
++     // Vanilla RH-9 (glibc 2.3.2) has a bug that confstr() always tells
++     // us "NPTL-0.29" even we are running with LinuxThreads. Check if this
++     // is the case. LinuxThreads has a hard limit on max number of threads.
++     // So sysconf(_SC_THREAD_THREADS_MAX) will return a positive value.
++     // On the other hand, NPTL does not have such a limit, sysconf()
++     // will return -1 and errno is not changed. Check if it is really NPTL.
++     if (strcmp(os::Linux::glibc_version(), "glibc 2.3.2") == 0 &&
++         strstr(str, "NPTL") &&
++         sysconf(_SC_THREAD_THREADS_MAX) > 0) {
++       free(str);
++       os::Linux::set_libpthread_version("linuxthreads");
++     } else {
++       os::Linux::set_libpthread_version(str);
++     }
++  } else {
++    // glibc before 2.3.2 only has LinuxThreads.
++    os::Linux::set_libpthread_version("linuxthreads");
++  }
++
++  if (strstr(libpthread_version(), "NPTL")) {
++     os::Linux::set_is_NPTL();
++  } else {
++     os::Linux::set_is_LinuxThreads();
++  }
++
++  // LinuxThreads have two flavors: floating-stack mode, which allows variable
++  // stack size; and fixed-stack mode. NPTL is always floating-stack.
++  if (os::Linux::is_NPTL() || os::Linux::supports_variable_stack_size()) {
++     os::Linux::set_is_floating_stack();
++  }
++}
++
++/////////////////////////////////////////////////////////////////////////////
++// thread stack
++
++// Force Linux kernel to expand current thread stack. If "bottom" is close
++// to the stack guard, caller should block all signals.
++//
++// MAP_GROWSDOWN:
++//   A special mmap() flag that is used to implement thread stacks. It tells
++//   kernel that the memory region should extend downwards when needed. This
++//   allows early versions of LinuxThreads to only mmap the first few pages
++//   when creating a new thread. Linux kernel will automatically expand thread
++//   stack as needed (on page faults).
++//
++//   However, because the memory region of a MAP_GROWSDOWN stack can grow on
++//   demand, if a page fault happens outside an already mapped MAP_GROWSDOWN
++//   region, it's hard to tell if the fault is due to a legitimate stack
++//   access or because of reading/writing non-exist memory (e.g. buffer
++//   overrun). As a rule, if the fault happens below current stack pointer,
++//   Linux kernel does not expand stack, instead a SIGSEGV is sent to the
++//   application (see Linux kernel fault.c).
++//
++//   This Linux feature can cause SIGSEGV when VM bangs thread stack for
++//   stack overflow detection.
++//
++//   Newer version of LinuxThreads (since glibc-2.2, or, RH-7.x) and NPTL do
++//   not use this flag. However, the stack of initial thread is not created
++//   by pthread, it is still MAP_GROWSDOWN. Also it's possible (though
++//   unlikely) that user code can create a thread with MAP_GROWSDOWN stack
++//   and then attach the thread to JVM.
++//
++// To get around the problem and allow stack banging on Linux, we need to
++// manually expand thread stack after receiving the SIGSEGV.
++//
++// There are two ways to expand thread stack to address "bottom", we used
++// both of them in JVM before 1.5:
++//   1. adjust stack pointer first so that it is below "bottom", and then
++//      touch "bottom"
++//   2. mmap() the page in question
++//
++// Now alternate signal stack is gone, it's harder to use 2. For instance,
++// if current sp is already near the lower end of page 101, and we need to
++// call mmap() to map page 100, it is possible that part of the mmap() frame
++// will be placed in page 100. When page 100 is mapped, it is zero-filled.
++// That will destroy the mmap() frame and cause VM to crash.
++//
++// The following code works by adjusting sp first, then accessing the "bottom"
++// page to force a page fault. Linux kernel will then automatically expand the
++// stack mapping.
++//
++// _expand_stack_to() assumes its frame size is less than page size, which
++// should always be true if the function is not inlined.
++
++#if __GNUC__ < 3    // gcc 2.x does not support noinline attribute
++#define NOINLINE
++#else
++#define NOINLINE __attribute__ ((noinline))
++#endif
++
++static void _expand_stack_to(address bottom) NOINLINE;
++
++static void _expand_stack_to(address bottom) {
++  address sp;
++  size_t size;
++  volatile char *p;
++
++  // Adjust bottom to point to the largest address within the same page, it
++  // gives us a one-page buffer if alloca() allocates slightly more memory.
++  bottom = (address)align_size_down((uintptr_t)bottom, os::Linux::page_size());
++  bottom += os::Linux::page_size() - 1;
++
++  // sp might be slightly above current stack pointer; if that's the case, we
++  // will alloca() a little more space than necessary, which is OK. Don't use
++  // os::current_stack_pointer(), as its result can be slightly below current
++  // stack pointer, causing us to not alloca enough to reach "bottom".
++  sp = (address)&sp;
++
++  if (sp > bottom) {
++    size = sp - bottom;
++    p = (volatile char *)alloca(size);
++    assert(p != NULL && p <= (volatile char *)bottom, "alloca problem?");
++    p[0] = '\0';
++  }
++}
++
++bool os::Linux::manually_expand_stack(JavaThread * t, address addr) {
++  assert(t!=NULL, "just checking");
++  assert(t->osthread()->expanding_stack(), "expand should be set");
++  assert(t->stack_base() != NULL, "stack_base was not initialized");
++
++  if (addr <  t->stack_base() && addr >= t->stack_yellow_zone_base()) {
++    sigset_t mask_all, old_sigset;
++    sigfillset(&mask_all);
++    pthread_sigmask(SIG_SETMASK, &mask_all, &old_sigset);
++    _expand_stack_to(addr);
++    pthread_sigmask(SIG_SETMASK, &old_sigset, NULL);
++    return true;
++  }
++  return false;
++}
++
++//////////////////////////////////////////////////////////////////////////////
++// create new thread
++
++static address highest_vm_reserved_address();
++
++// check if it's safe to start a new thread
++static bool _thread_safety_check(Thread* thread) {
++  if (os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack()) {
++    // Fixed stack LinuxThreads (SuSE Linux/x86, and some versions of Redhat)
++    //   Heap is mmap'ed at lower end of memory space. Thread stacks are
++    //   allocated (MAP_FIXED) from high address space. Every thread stack
++    //   occupies a fixed size slot (usually 2Mbytes, but user can change
++    //   it to other values if they rebuild LinuxThreads).
++    //
++    // Problem with MAP_FIXED is that mmap() can still succeed even part of
++    // the memory region has already been mmap'ed. That means if we have too
++    // many threads and/or very large heap, eventually thread stack will
++    // collide with heap.
++    //
++    // Here we try to prevent heap/stack collision by comparing current
++    // stack bottom with the highest address that has been mmap'ed by JVM
++    // plus a safety margin for memory maps created by native code.
++    //
++    // This feature can be disabled by setting ThreadSafetyMargin to 0
++    //
++    if (ThreadSafetyMargin > 0) {
++      address stack_bottom = os::current_stack_base() - os::current_stack_size();
++
++      // not safe if our stack extends below the safety margin
++      return stack_bottom - ThreadSafetyMargin >= highest_vm_reserved_address();
++    } else {
++      return true;
++    }
++  } else {
++    // Floating stack LinuxThreads or NPTL:
++    //   Unlike fixed stack LinuxThreads, thread stacks are not MAP_FIXED. When
++    //   there's not enough space left, pthread_create() will fail. If we come
++    //   here, that means enough space has been reserved for stack.
++    return true;
++  }
++}
++
++// Thread start routine for all newly created threads
++static void *java_start(Thread *thread) {
++  // Try to randomize the cache line index of hot stack frames.
++  // This helps when threads of the same stack traces evict each other's
++  // cache lines. The threads can be either from the same JVM instance, or
++  // from different JVM instances. The benefit is especially true for
++  // processors with hyperthreading technology.
++  static int counter = 0;
++  int pid = os::current_process_id();
++  alloca(((pid ^ counter++) & 7) * 128);
++
++  ThreadLocalStorage::set_thread(thread);
++
++  OSThread* osthread = thread->osthread();
++  Monitor* sync = osthread->startThread_lock();
++
++  // non floating stack LinuxThreads needs extra check, see above
++  if (!_thread_safety_check(thread)) {
++    // notify parent thread
++    MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag);
++    osthread->set_state(ZOMBIE);
++    sync->notify_all();
++    return NULL;
++  }
++
++  // thread_id is kernel thread id (similar to Solaris LWP id)
++  osthread->set_thread_id(os::Linux::gettid());
++
++  if (UseNUMA) {
++    int lgrp_id = os::numa_get_group_id();
++    if (lgrp_id != -1) {
++      thread->set_lgrp_id(lgrp_id);
++    }
++  }
++  // initialize signal mask for this thread
++  os::Linux::hotspot_sigmask(thread);
++
++  // initialize floating point control register
++  os::Linux::init_thread_fpu_state();
++
++  // handshaking with parent thread
++  {
++    MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag);
++
++    // notify parent thread
++    osthread->set_state(INITIALIZED);
++    sync->notify_all();
++
++    // wait until os::start_thread()
++    while (osthread->get_state() == INITIALIZED) {
++      sync->wait(Mutex::_no_safepoint_check_flag);
++    }
++  }
++
++  // call one more level start routine
++  thread->run();
++
++  return 0;
++}
++
++bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
++  assert(thread->osthread() == NULL, "caller responsible");
++
++  // Allocate the OSThread object
++  OSThread* osthread = new OSThread(NULL, NULL);
++  if (osthread == NULL) {
++    return false;
++  }
++
++  // set the correct thread state
++  osthread->set_thread_type(thr_type);
++
++  // Initial state is ALLOCATED but not INITIALIZED
++  osthread->set_state(ALLOCATED);
++
++  thread->set_osthread(osthread);
++
++  // init thread attributes
++  pthread_attr_t attr;
++  pthread_attr_init(&attr);
++  pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
++
++  // stack size
++  if (os::Linux::supports_variable_stack_size()) {
++    // calculate stack size if it's not specified by caller
++    if (stack_size == 0) {
++      stack_size = os::Linux::default_stack_size(thr_type);
++
++      switch (thr_type) {
++      case os::java_thread:
++        // Java threads use ThreadStackSize which default value can be
++        // changed with the flag -Xss
++        assert (JavaThread::stack_size_at_create() > 0, "this should be set");
++        stack_size = JavaThread::stack_size_at_create();
++        break;
++      case os::compiler_thread:
++        if (CompilerThreadStackSize > 0) {
++          stack_size = (size_t)(CompilerThreadStackSize * K);
++          break;
++        } // else fall through:
++          // use VMThreadStackSize if CompilerThreadStackSize is not defined
++      case os::vm_thread:
++      case os::pgc_thread:
++      case os::cgc_thread:
++      case os::watcher_thread:
++        if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
++        break;
++      }
++    }
++
++    stack_size = MAX2(stack_size, os::Linux::min_stack_allowed);
++    pthread_attr_setstacksize(&attr, stack_size);
++  } else {
++    // let pthread_create() pick the default value.
++  }
++
++  // glibc guard page
++  pthread_attr_setguardsize(&attr, os::Linux::default_guard_size(thr_type));
++
++  ThreadState state;
++
++  {
++    // Serialize thread creation if we are running with fixed stack LinuxThreads
++    bool lock = os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack();
++    if (lock) {
++      os::Linux::createThread_lock()->lock_without_safepoint_check();
++    }
++
++    pthread_t tid;
++    int ret = pthread_create(&tid, &attr, (void* (*)(void*)) java_start, thread);
++
++    pthread_attr_destroy(&attr);
++
++    if (ret != 0) {
++      if (PrintMiscellaneous && (Verbose || WizardMode)) {
++        perror("pthread_create()");
++      }
++      // Need to clean up stuff we've allocated so far
++      thread->set_osthread(NULL);
++      delete osthread;
++      if (lock) os::Linux::createThread_lock()->unlock();
++      return false;
++    }
++
++    // Store pthread info into the OSThread
++    osthread->set_pthread_id(tid);
++
++    // Wait until child thread is either initialized or aborted
++    {
++      Monitor* sync_with_child = osthread->startThread_lock();
++      MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag);
++      while ((state = osthread->get_state()) == ALLOCATED) {
++        sync_with_child->wait(Mutex::_no_safepoint_check_flag);
++      }
++    }
++
++    if (lock) {
++      os::Linux::createThread_lock()->unlock();
++    }
++  }
++
++  // Aborted due to thread limit being reached
++  if (state == ZOMBIE) {
++      thread->set_osthread(NULL);
++      delete osthread;
++      return false;
++  }
++
++  // The thread is returned suspended (in state INITIALIZED),
++  // and is started higher up in the call chain
++  assert(state == INITIALIZED, "race condition");
++  return true;
++}
++
++/////////////////////////////////////////////////////////////////////////////
++// attach existing thread
++
++// bootstrap the main thread
++bool os::create_main_thread(JavaThread* thread) {
++  assert(os::Linux::_main_thread == pthread_self(), "should be called inside main thread");
++  return create_attached_thread(thread);
++}
++
++bool os::create_attached_thread(JavaThread* thread) {
++#ifdef ASSERT
++    thread->verify_not_published();
++#endif
++
++  // Allocate the OSThread object
++  OSThread* osthread = new OSThread(NULL, NULL);
++
++  if (osthread == NULL) {
++    return false;
++  }
++
++  // Store pthread info into the OSThread
++  osthread->set_thread_id(os::Linux::gettid());
++  osthread->set_pthread_id(::pthread_self());
++
++  // initialize floating point control register
++  os::Linux::init_thread_fpu_state();
++
++  // Initial thread state is RUNNABLE
++  osthread->set_state(RUNNABLE);
++
++  thread->set_osthread(osthread);
++
++  if (UseNUMA) {
++    int lgrp_id = os::numa_get_group_id();
++    if (lgrp_id != -1) {
++      thread->set_lgrp_id(lgrp_id);
++    }
++  }
++
++  if (os::Linux::is_initial_thread()) {
++    // If current thread is initial thread, its stack is mapped on demand,
++    // see notes about MAP_GROWSDOWN. Here we try to force kernel to map
++    // the entire stack region to avoid SEGV in stack banging.
++    // It is also useful to get around the heap-stack-gap problem on SuSE
++    // kernel (see 4821821 for details). We first expand stack to the top
++    // of yellow zone, then enable stack yellow zone (order is significant,
++    // enabling yellow zone first will crash JVM on SuSE Linux), so there
++    // is no gap between the last two virtual memory regions.
++
++    JavaThread *jt = (JavaThread *)thread;
++    address addr = jt->stack_yellow_zone_base();
++    assert(addr != NULL, "initialization problem?");
++    assert(jt->stack_available(addr) > 0, "stack guard should not be enabled");
++
++    osthread->set_expanding_stack();
++    os::Linux::manually_expand_stack(jt, addr);
++    osthread->clear_expanding_stack();
++  }
++
++  // initialize signal mask for this thread
++  // and save the caller's signal mask
++  os::Linux::hotspot_sigmask(thread);
++
++  return true;
++}
++
++void os::pd_start_thread(Thread* thread) {
++  OSThread * osthread = thread->osthread();
++  assert(osthread->get_state() != INITIALIZED, "just checking");
++  Monitor* sync_with_child = osthread->startThread_lock();
++  MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag);
++  sync_with_child->notify();
++}
++
++// Free Linux resources related to the OSThread
++void os::free_thread(OSThread* osthread) {
++  assert(osthread != NULL, "osthread not set");
++
++  if (Thread::current()->osthread() == osthread) {
++    // Restore caller's signal mask
++    sigset_t sigmask = osthread->caller_sigmask();
++    pthread_sigmask(SIG_SETMASK, &sigmask, NULL);
++   }
++
++  delete osthread;
++}
++
++//////////////////////////////////////////////////////////////////////////////
++// thread local storage
++
++int os::allocate_thread_local_storage() {
++  pthread_key_t key;
++  int rslt = pthread_key_create(&key, NULL);
++  assert(rslt == 0, "cannot allocate thread local storage");
++  return (int)key;
++}
++
++// Note: This is currently not used by VM, as we don't destroy TLS key
++// on VM exit.
++void os::free_thread_local_storage(int index) {
++  int rslt = pthread_key_delete((pthread_key_t)index);
++  assert(rslt == 0, "invalid index");
++}
++
++void os::thread_local_storage_at_put(int index, void* value) {
++  int rslt = pthread_setspecific((pthread_key_t)index, value);
++  assert(rslt == 0, "pthread_setspecific failed");
++}
++
++extern "C" Thread* get_thread() {
++  return ThreadLocalStorage::thread();
++}
++
++//////////////////////////////////////////////////////////////////////////////
++// initial thread
++
++// Check if current thread is the initial thread, similar to Solaris thr_main.
++bool os::Linux::is_initial_thread(void) {
++  char dummy;
++  // If called before init complete, thread stack bottom will be null.
++  // Can be called if fatal error occurs before initialization.
++  if (initial_thread_stack_bottom() == NULL) return false;
++  assert(initial_thread_stack_bottom() != NULL &&
++         initial_thread_stack_size()   != 0,
++         "os::init did not locate initial thread's stack region");
++  if ((address)&dummy >= initial_thread_stack_bottom() &&
++      (address)&dummy < initial_thread_stack_bottom() + initial_thread_stack_size())
++       return true;
++  else return false;
++}
++
++// Find the virtual memory area that contains addr
++static bool find_vma(address addr, address* vma_low, address* vma_high) {
++  FILE *fp = fopen("/proc/self/maps", "r");
++  if (fp) {
++    address low, high;
++    while (!feof(fp)) {
++      if (fscanf(fp, "%p-%p", &low, &high) == 2) {
++        if (low <= addr && addr < high) {
++           if (vma_low)  *vma_low  = low;
++           if (vma_high) *vma_high = high;
++           fclose (fp);
++           return true;
++        }
++      }
++      for (;;) {
++        int ch = fgetc(fp);
++        if (ch == EOF || ch == (int)'\n') break;
++      }
++    }
++    fclose(fp);
++  }
++  return false;
++}
++
++// Locate initial thread stack. This special handling of initial thread stack
++// is needed because pthread_getattr_np() on most (all?) Linux distros returns
++// bogus value for initial thread.
++void os::Linux::capture_initial_stack(size_t max_size) {
++  // stack size is the easy part, get it from RLIMIT_STACK
++  size_t stack_size;
++  struct rlimit rlim;
++  getrlimit(RLIMIT_STACK, &rlim);
++  stack_size = rlim.rlim_cur;
++
++  // 6308388: a bug in ld.so will relocate its own .data section to the
++  //   lower end of primordial stack; reduce ulimit -s value a little bit
++  //   so we won't install guard page on ld.so's data section.
++  stack_size -= 2 * page_size();
++
++  // 4441425: avoid crash with "unlimited" stack size on SuSE 7.1 or Redhat
++  //   7.1, in both cases we will get 2G in return value.
++  // 4466587: glibc 2.2.x compiled w/o "--enable-kernel=2.4.0" (RH 7.0,
++  //   SuSE 7.2, Debian) can not handle alternate signal stack correctly
++  //   for initial thread if its stack size exceeds 6M. Cap it at 2M,
++  //   in case other parts in glibc still assumes 2M max stack size.
++  // FIXME: alt signal stack is gone, maybe we can relax this constraint?
++#ifndef IA64
++  if (stack_size > 2 * K * K) stack_size = 2 * K * K;
++#else
++  // Problem still exists RH7.2 (IA64 anyway) but 2MB is a little small
++  if (stack_size > 4 * K * K) stack_size = 4 * K * K;
++#endif
++
++  // Try to figure out where the stack base (top) is. This is harder.
++  //
++  // When an application is started, glibc saves the initial stack pointer in
++  // a global variable "__libc_stack_end", which is then used by system
++  // libraries. __libc_stack_end should be pretty close to stack top. The
++  // variable is available since the very early days. However, because it is
++  // a private interface, it could disappear in the future.
++  //
++  // Linux kernel saves start_stack information in /proc/<pid>/stat. Similar
++  // to __libc_stack_end, it is very close to stack top, but isn't the real
++  // stack top. Note that /proc may not exist if VM is running as a chroot
++  // program, so reading /proc/<pid>/stat could fail. Also the contents of
++  // /proc/<pid>/stat could change in the future (though unlikely).
++  //
++  // We try __libc_stack_end first. If that doesn't work, look for
++  // /proc/<pid>/stat. If neither of them works, we use current stack pointer
++  // as a hint, which should work well in most cases.
++
++  uintptr_t stack_start;
++
++  // try __libc_stack_end first
++  uintptr_t *p = (uintptr_t *)dlsym(RTLD_DEFAULT, "__libc_stack_end");
++  if (p && *p) {
++    stack_start = *p;
++  } else {
++    // see if we can get the start_stack field from /proc/self/stat
++    FILE *fp;
++    int pid;
++    char state;
++    int ppid;
++    int pgrp;
++    int session;
++    int nr;
++    int tpgrp;
++    unsigned long flags;
++    unsigned long minflt;
++    unsigned long cminflt;
++    unsigned long majflt;
++    unsigned long cmajflt;
++    unsigned long utime;
++    unsigned long stime;
++    long cutime;
++    long cstime;
++    long prio;
++    long nice;
++    long junk;
++    long it_real;
++    uintptr_t start;
++    uintptr_t vsize;
++    intptr_t rss;
++    uintptr_t rsslim;
++    uintptr_t scodes;
++    uintptr_t ecode;
++    int i;
++
++    // Figure what the primordial thread stack base is. Code is inspired
++    // by email from Hans Boehm. /proc/self/stat begins with current pid,
++    // followed by command name surrounded by parentheses, state, etc.
++    char stat[2048];
++    int statlen;
++
++    fp = fopen("/proc/self/stat", "r");
++    if (fp) {
++      statlen = fread(stat, 1, 2047, fp);
++      stat[statlen] = '\0';
++      fclose(fp);
++
++      // Skip pid and the command string. Note that we could be dealing with
++      // weird command names, e.g. user could decide to rename java launcher
++      // to "java 1.4.2 :)", then the stat file would look like
++      //                1234 (java 1.4.2 :)) R ... ...
++      // We don't really need to know the command string, just find the last
++      // occurrence of ")" and then start parsing from there. See bug 4726580.
++      char * s = strrchr(stat, ')');
++
++      i = 0;
++      if (s) {
++        // Skip blank chars
++        do s++; while (isspace(*s));
++
++#define _UFM UINTX_FORMAT
++#define _DFM INTX_FORMAT
++
++        /*                                     1   1   1   1   1   1   1   1   1   1   2   2    2    2    2    2    2    2    2 */
++        /*              3  4  5  6  7  8   9   0   1   2   3   4   5   6   7   8   9   0   1    2    3    4    5    6    7    8 */
++        i = sscanf(s, "%c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld " _UFM _UFM _DFM _UFM _UFM _UFM _UFM,
++             &state,          /* 3  %c  */
++             &ppid,           /* 4  %d  */
++             &pgrp,           /* 5  %d  */
++             &session,        /* 6  %d  */
++             &nr,             /* 7  %d  */
++             &tpgrp,          /* 8  %d  */
++             &flags,          /* 9  %lu  */
++             &minflt,         /* 10 %lu  */
++             &cminflt,        /* 11 %lu  */
++             &majflt,         /* 12 %lu  */
++             &cmajflt,        /* 13 %lu  */
++             &utime,          /* 14 %lu  */
++             &stime,          /* 15 %lu  */
++             &cutime,         /* 16 %ld  */
++             &cstime,         /* 17 %ld  */
++             &prio,           /* 18 %ld  */
++             &nice,           /* 19 %ld  */
++             &junk,           /* 20 %ld  */
++             &it_real,        /* 21 %ld  */
++             &start,          /* 22 UINTX_FORMAT */
++             &vsize,          /* 23 UINTX_FORMAT */
++             &rss,            /* 24 INTX_FORMAT  */
++             &rsslim,         /* 25 UINTX_FORMAT */
++             &scodes,         /* 26 UINTX_FORMAT */
++             &ecode,          /* 27 UINTX_FORMAT */
++             &stack_start);   /* 28 UINTX_FORMAT */
++      }
++
++#undef _UFM
++#undef _DFM
++
++      if (i != 28 - 2) {
++         assert(false, "Bad conversion from /proc/self/stat");
++         // product mode - assume we are the initial thread, good luck in the
++         // embedded case.
++         warning("Can't detect initial thread stack location - bad conversion");
++         stack_start = (uintptr_t) &rlim;
++      }
++    } else {
++      // For some reason we can't open /proc/self/stat (for example, running on
++      // FreeBSD with a Linux emulator, or inside chroot), this should work for
++      // most cases, so don't abort:
++      warning("Can't detect initial thread stack location - no /proc/self/stat");
++      stack_start = (uintptr_t) &rlim;
++    }
++  }
++
++  // Now we have a pointer (stack_start) very close to the stack top, the
++  // next thing to do is to figure out the exact location of stack top. We
++  // can find out the virtual memory area that contains stack_start by
++  // reading /proc/self/maps, it should be the last vma in /proc/self/maps,
++  // and its upper limit is the real stack top. (again, this would fail if
++  // running inside chroot, because /proc may not exist.)
++
++  uintptr_t stack_top;
++  address low, high;
++  if (find_vma((address)stack_start, &low, &high)) {
++    // success, "high" is the true stack top. (ignore "low", because initial
++    // thread stack grows on demand, its real bottom is high - RLIMIT_STACK.)
++    stack_top = (uintptr_t)high;
++  } else {
++    // failed, likely because /proc/self/maps does not exist
++    warning("Can't detect initial thread stack location - find_vma failed");
++    // best effort: stack_start is normally within a few pages below the real
++    // stack top, use it as stack top, and reduce stack size so we won't put
++    // guard page outside stack.
++    stack_top = stack_start;
++    stack_size -= 16 * page_size();
++  }
++
++  // stack_top could be partially down the page so align it
++  stack_top = align_size_up(stack_top, page_size());
++
++  if (max_size && stack_size > max_size) {
++     _initial_thread_stack_size = max_size;
++  } else {
++     _initial_thread_stack_size = stack_size;
++  }
++
++  _initial_thread_stack_size = align_size_down(_initial_thread_stack_size, page_size());
++  _initial_thread_stack_bottom = (address)stack_top - _initial_thread_stack_size;
++}
++
++////////////////////////////////////////////////////////////////////////////////
++// time support
++
++// Time since start-up in seconds to a fine granularity.
++// Used by VMSelfDestructTimer and the MemProfiler.
++double os::elapsedTime() {
++
++  return (double)(os::elapsed_counter()) * 0.000001;
++}
++
++jlong os::elapsed_counter() {
++  timeval time;
++  int status = gettimeofday(&time, NULL);
++  return jlong(time.tv_sec) * 1000 * 1000 + jlong(time.tv_usec) - initial_time_count;
++}
++
++jlong os::elapsed_frequency() {
++  return (1000 * 1000);
++}
++
++// For now, we say that linux does not support vtime.  I have no idea
++// whether it can actually be made to (DLD, 9/13/05).
++
++bool os::supports_vtime() { return false; }
++bool os::enable_vtime()   { return false; }
++bool os::vtime_enabled()  { return false; }
++double os::elapsedVTime() {
++  // better than nothing, but not much
++  return elapsedTime();
++}
++
++jlong os::javaTimeMillis() {
++  timeval time;
++  int status = gettimeofday(&time, NULL);
++  assert(status != -1, "linux error");
++  return jlong(time.tv_sec) * 1000  +  jlong(time.tv_usec / 1000);
++}
++
++#ifndef CLOCK_MONOTONIC
++#define CLOCK_MONOTONIC (1)
++#endif
++
++void os::Linux::clock_init() {
++  // we do dlopen's in this particular order due to bug in linux
++  // dynamical loader (see 6348968) leading to crash on exit
++  void* handle = dlopen("librt.so.1", RTLD_LAZY);
++  if (handle == NULL) {
++    handle = dlopen("librt.so", RTLD_LAZY);
++  }
++
++  if (handle) {
++    int (*clock_getres_func)(clockid_t, struct timespec*) =
++           (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_getres");
++    int (*clock_gettime_func)(clockid_t, struct timespec*) =
++           (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_gettime");
++    if (clock_getres_func && clock_gettime_func) {
++      // See if monotonic clock is supported by the kernel. Note that some
++      // early implementations simply return kernel jiffies (updated every
++      // 1/100 or 1/1000 second). It would be bad to use such a low res clock
++      // for nano time (though the monotonic property is still nice to have).
++      // It's fixed in newer kernels, however clock_getres() still returns
++      // 1/HZ. We check if clock_getres() works, but will ignore its reported
++      // resolution for now. Hopefully as people move to new kernels, this
++      // won't be a problem.
++      struct timespec res;
++      struct timespec tp;
++      if (clock_getres_func (CLOCK_MONOTONIC, &res) == 0 &&
++          clock_gettime_func(CLOCK_MONOTONIC, &tp)  == 0) {
++        // yes, monotonic clock is supported
++        _clock_gettime = clock_gettime_func;
++      } else {
++        // close librt if there is no monotonic clock
++        dlclose(handle);
++      }
++    }
++  }
++}
++
++#ifndef SYS_clock_getres
++
++#if defined(IA32) || defined(AMD64)
++#define SYS_clock_getres IA32_ONLY(266)  AMD64_ONLY(229)
++#define sys_clock_getres(x,y)  ::syscall(SYS_clock_getres, x, y)
++#else
++#warning "SYS_clock_getres not defined for this platform, disabling fast_thread_cpu_time"
++#define sys_clock_getres(x,y)  -1
++#endif
++
++#else
++#define sys_clock_getres(x,y)  ::syscall(SYS_clock_getres, x, y)
++#endif
++
++void os::Linux::fast_thread_clock_init() {
++  if (!UseLinuxPosixThreadCPUClocks) {
++    return;
++  }
++  clockid_t clockid;
++  struct timespec tp;
++  int (*pthread_getcpuclockid_func)(pthread_t, clockid_t *) =
++      (int(*)(pthread_t, clockid_t *)) dlsym(RTLD_DEFAULT, "pthread_getcpuclockid");
++
++  // Switch to using fast clocks for thread cpu time if
++  // the sys_clock_getres() returns 0 error code.
++  // Note, that some kernels may support the current thread
++  // clock (CLOCK_THREAD_CPUTIME_ID) but not the clocks
++  // returned by the pthread_getcpuclockid().
++  // If the fast Posix clocks are supported then the sys_clock_getres()
++  // must return at least tp.tv_sec == 0 which means a resolution
++  // better than 1 sec. This is extra check for reliability.
++
++  if(pthread_getcpuclockid_func &&
++     pthread_getcpuclockid_func(_main_thread, &clockid) == 0 &&
++     sys_clock_getres(clockid, &tp) == 0 && tp.tv_sec == 0) {
++
++    _supports_fast_thread_cpu_time = true;
++    _pthread_getcpuclockid = pthread_getcpuclockid_func;
++  }
++}
++
++jlong os::javaTimeNanos() {
++  if (Linux::supports_monotonic_clock()) {
++    struct timespec tp;
++    int status = Linux::clock_gettime(CLOCK_MONOTONIC, &tp);
++    assert(status == 0, "gettime error");
++    jlong result = jlong(tp.tv_sec) * (1000 * 1000 * 1000) + jlong(tp.tv_nsec);
++    return result;
++  } else {
++    timeval time;
++    int status = gettimeofday(&time, NULL);
++    assert(status != -1, "linux error");
++    jlong usecs = jlong(time.tv_sec) * (1000 * 1000) + jlong(time.tv_usec);
++    return 1000 * usecs;
++  }
++}
++
++void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
++  if (Linux::supports_monotonic_clock()) {
++    info_ptr->max_value = ALL_64_BITS;
++
++    // CLOCK_MONOTONIC - amount of time since some arbitrary point in the past
++    info_ptr->may_skip_backward = false;      // not subject to resetting or drifting
++    info_ptr->may_skip_forward = false;       // not subject to resetting or drifting
++  } else {
++    // gettimeofday - based on time in seconds since the Epoch thus does not wrap
++    info_ptr->max_value = ALL_64_BITS;
++
++    // gettimeofday is a real time clock so it skips
++    info_ptr->may_skip_backward = true;
++    info_ptr->may_skip_forward = true;
++  }
++
++  info_ptr->kind = JVMTI_TIMER_ELAPSED;                // elapsed not CPU time
++}
++
++// Return the real, user, and system times in seconds from an
++// arbitrary fixed point in the past.
++bool os::getTimesSecs(double* process_real_time,
++                      double* process_user_time,
++                      double* process_system_time) {
++  struct tms ticks;
++  clock_t real_ticks = times(&ticks);
++
++  if (real_ticks == (clock_t) (-1)) {
++    return false;
++  } else {
++    double ticks_per_second = (double) clock_tics_per_sec;
++    *process_user_time = ((double) ticks.tms_utime) / ticks_per_second;
++    *process_system_time = ((double) ticks.tms_stime) / ticks_per_second;
++    *process_real_time = ((double) real_ticks) / ticks_per_second;
++
++    return true;
++  }
++}
++
++
++char * os::local_time_string(char *buf, size_t buflen) {
++  struct tm t;
++  time_t long_time;
++  time(&long_time);
++  localtime_r(&long_time, &t);
++  jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
++               t.tm_year + 1900, t.tm_mon + 1, t.tm_mday,
++               t.tm_hour, t.tm_min, t.tm_sec);
++  return buf;
++}
++
++struct tm* os::localtime_pd(const time_t* clock, struct tm*  res) {
++  return localtime_r(clock, res);
++}
++
++////////////////////////////////////////////////////////////////////////////////
++// runtime exit support
++
++// Note: os::shutdown() might be called very early during initialization, or
++// called from signal handler. Before adding something to os::shutdown(), make
++// sure it is async-safe and can handle partially initialized VM.
++void os::shutdown() {
++
++  // allow PerfMemory to attempt cleanup of any persistent resources
++  perfMemory_exit();
++
++  // needs to remove object in file system
++  AttachListener::abort();
++
++  // flush buffered output, finish log files
++  ostream_abort();
++
++  // Check for abort hook
++  abort_hook_t abort_hook = Arguments::abort_hook();
++  if (abort_hook != NULL) {
++    abort_hook();
++  }
++
++}
++
++// Note: os::abort() might be called very early during initialization, or
++// called from signal handler. Before adding something to os::abort(), make
++// sure it is async-safe and can handle partially initialized VM.
++void os::abort(bool dump_core) {
++  os::shutdown();
++  if (dump_core) {
++#ifndef PRODUCT
++    fdStream out(defaultStream::output_fd());
++    out.print_raw("Current thread is ");
++    char buf[16];
++    jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id());
++    out.print_raw_cr(buf);
++    out.print_raw_cr("Dumping core ...");
++#endif
++    ::abort(); // dump core
++  }
++
++  ::exit(1);
++}
++
++// Die immediately, no exit hook, no abort hook, no cleanup.
++void os::die() {
++  // _exit() on LinuxThreads only kills current thread
++  ::abort();
++}
++
++// unused on linux for now.
++void os::set_error_file(const char *logfile) {}
++
++
++// This method is a copy of JDK's sysGetLastErrorString
++// from src/solaris/hpi/src/system_md.c
++
++size_t os::lasterror(char *buf, size_t len) {
++
++  if (errno == 0)  return 0;
++
++  const char *s = ::strerror(errno);
++  size_t n = ::strlen(s);
++  if (n >= len) {
++    n = len - 1;
++  }
++  ::strncpy(buf, s, n);
++  buf[n] = '\0';
++  return n;
++}
++
++intx os::current_thread_id() { return (intx)pthread_self(); }
++int os::current_process_id() {
++
++  // Under the old linux thread library, linux gives each thread
++  // its own process id. Because of this each thread will return
++  // a different pid if this method were to return the result
++  // of getpid(2). Linux provides no api that returns the pid
++  // of the launcher thread for the vm. This implementation
++  // returns a unique pid, the pid of the launcher thread
++  // that starts the vm 'process'.
++
++  // Under the NPTL, getpid() returns the same pid as the
++  // launcher thread rather than a unique pid per thread.
++  // Use gettid() if you want the old pre NPTL behaviour.
++
++  // if you are looking for the result of a call to getpid() that
++  // returns a unique pid for the calling thread, then look at the
++  // OSThread::thread_id() method in osThread_linux.hpp file
++
++  return (int)(_initial_pid ? _initial_pid : getpid());
++}
++
++// DLL functions
++
++const char* os::dll_file_extension() { return ".so"; }
++
++// This must be hard coded because it's the system's temporary
++// directory not the java application's temp directory, ala java.io.tmpdir.
++const char* os::get_temp_directory() { return "/tmp"; }
++
++static bool file_exists(const char* filename) {
++  struct stat statbuf;
++  if (filename == NULL || strlen(filename) == 0) {
++    return false;
++  }
++  return os::stat(filename, &statbuf) == 0;
++}
++
++void os::dll_build_name(char* buffer, size_t buflen,
++                        const char* pname, const char* fname) {
++  // Copied from libhpi
++  const size_t pnamelen = pname ? strlen(pname) : 0;
++
++  // Quietly truncate on buffer overflow.  Should be an error.
++  if (pnamelen + strlen(fname) + 10 > (size_t) buflen) {
++      *buffer = '\0';
++      return;
++  }
++
++  if (pnamelen == 0) {
++    snprintf(buffer, buflen, "lib%s.so", fname);
++  } else if (strchr(pname, *os::path_separator()) != NULL) {
++    int n;
++    char** pelements = split_path(pname, &n);
++    for (int i = 0 ; i < n ; i++) {
++      // Really shouldn't be NULL, but check can't hurt
++      if (pelements[i] == NULL || strlen(pelements[i]) == 0) {
++        continue; // skip the empty path values
++      }
++      snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname);
++      if (file_exists(buffer)) {
++        break;
++      }
++    }
++    // release the storage
++    for (int i = 0 ; i < n ; i++) {
++      if (pelements[i] != NULL) {
++        FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal);
++      }
++    }
++    if (pelements != NULL) {
++      FREE_C_HEAP_ARRAY(char*, pelements, mtInternal);
++    }
++  } else {
++    snprintf(buffer, buflen, "%s/lib%s.so", pname, fname);
++  }
++}
++
++const char* os::get_current_directory(char *buf, int buflen) {
++  return getcwd(buf, buflen);
++}
++
++// check if addr is inside libjvm[_g].so
++bool os::address_is_in_vm(address addr) {
++  static address libjvm_base_addr;
++  Dl_info dlinfo;
++
++  if (libjvm_base_addr == NULL) {
++    if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) {
++      libjvm_base_addr = (address)dlinfo.dli_fbase;
++    }
++    assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm");
++  }
++
++  if (dladdr((void *)addr, &dlinfo) != 0) {
++    if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true;
++  }
++
++  return false;
++}
++
++bool os::dll_address_to_function_name(address addr, char *buf,
++                                      int buflen, int *offset) {
++  // buf is not optional, but offset is optional
++  assert(buf != NULL, "sanity check");
++
++  Dl_info dlinfo;
++
++  if (dladdr((void*)addr, &dlinfo) != 0) {
++    // see if we have a matching symbol
++    if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) {
++      if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) {
++        jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname);
++      }
++      if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr;
++      return true;
++    }
++    // no matching symbol so try for just file info
++    if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) {
++      if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase),
++                          buf, buflen, offset, dlinfo.dli_fname)) {
++        return true;
++      }
++    }
++  }
++
++  buf[0] = '\0';
++  if (offset != NULL) *offset = -1;
++  return false;
++}
++
++struct _address_to_library_name {
++  address addr;          // input : memory address
++  size_t  buflen;        //         size of fname
++  char*   fname;         // output: library name
++  address base;          //         library base addr
++};
++
++static int address_to_library_name_callback(struct dl_phdr_info *info,
++                                            size_t size, void *data) {
++  int i;
++  bool found = false;
++  address libbase = NULL;
++  struct _address_to_library_name * d = (struct _address_to_library_name *)data;
++
++  // iterate through all loadable segments
++  for (i = 0; i < info->dlpi_phnum; i++) {
++    address segbase = (address)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr);
++    if (info->dlpi_phdr[i].p_type == PT_LOAD) {
++      // base address of a library is the lowest address of its loaded
++      // segments.
++      if (libbase == NULL || libbase > segbase) {
++        libbase = segbase;
++      }
++      // see if 'addr' is within current segment
++      if (segbase <= d->addr &&
++          d->addr < segbase + info->dlpi_phdr[i].p_memsz) {
++        found = true;
++      }
++    }
++  }
++
++  // dlpi_name is NULL or empty if the ELF file is executable, return 0
++  // so dll_address_to_library_name() can fall through to use dladdr() which
++  // can figure out executable name from argv[0].
++  if (found && info->dlpi_name && info->dlpi_name[0]) {
++    d->base = libbase;
++    if (d->fname) {
++      jio_snprintf(d->fname, d->buflen, "%s", info->dlpi_name);
++    }
++    return 1;
++  }
++  return 0;
++}
++
++bool os::dll_address_to_library_name(address addr, char* buf,
++                                     int buflen, int* offset) {
++  // buf is not optional, but offset is optional
++  assert(buf != NULL, "sanity check");
++
++  Dl_info dlinfo;
++  struct _address_to_library_name data;
++
++  // There is a bug in old glibc dladdr() implementation that it could resolve
++  // to wrong library name if the .so file has a base address != NULL. Here
++  // we iterate through the program headers of all loaded libraries to find
++  // out which library 'addr' really belongs to. This workaround can be
++  // removed once the minimum requirement for glibc is moved to 2.3.x.
++  data.addr = addr;
++  data.fname = buf;
++  data.buflen = buflen;
++  data.base = NULL;
++  int rslt = dl_iterate_phdr(address_to_library_name_callback, (void *)&data);
++
++  if (rslt) {
++     // buf already contains library name
++     if (offset) *offset = addr - data.base;
++     return true;
++  }
++  if (dladdr((void*)addr, &dlinfo) != 0) {
++    if (dlinfo.dli_fname != NULL) {
++      jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname);
++    }
++    if (dlinfo.dli_fbase != NULL && offset != NULL) {
++      *offset = addr - (address)dlinfo.dli_fbase;
++    }
++    return true;
++  }
++
++  buf[0] = '\0';
++  if (offset) *offset = -1;
++  return false;
++}
++
++  // Loads .dll/.so and
++  // in case of error it checks if .dll/.so was built for the
++  // same architecture as Hotspot is running on
++
++
++// Remember the stack's state. The Linux dynamic linker will change
++// the stack to 'executable' at most once, so we must safepoint only once.
++bool os::Linux::_stack_is_executable = false;
++
++// VM operation that loads a library.  This is necessary if stack protection
++// of the Java stacks can be lost during loading the library.  If we
++// do not stop the Java threads, they can stack overflow before the stacks
++// are protected again.
++class VM_LinuxDllLoad: public VM_Operation {
++ private:
++  const char *_filename;
++  char *_ebuf;
++  int _ebuflen;
++  void *_lib;
++ public:
++  VM_LinuxDllLoad(const char *fn, char *ebuf, int ebuflen) :
++    _filename(fn), _ebuf(ebuf), _ebuflen(ebuflen), _lib(NULL) {}
++  VMOp_Type type() const { return VMOp_LinuxDllLoad; }
++  void doit() {
++    _lib = os::Linux::dll_load_in_vmthread(_filename, _ebuf, _ebuflen);
++    os::Linux::_stack_is_executable = true;
++  }
++  void* loaded_library() { return _lib; }
++};
++
++void * os::dll_load(const char *filename, char *ebuf, int ebuflen)
++{
++  void * result = NULL;
++  bool load_attempted = false;
++
++  // Check whether the library to load might change execution rights
++  // of the stack. If they are changed, the protection of the stack
++  // guard pages will be lost. We need a safepoint to fix this.
++  //
++  // See Linux man page execstack(8) for more info.
++  if (os::uses_stack_guard_pages() && !os::Linux::_stack_is_executable) {
++    ElfFile ef(filename);
++    if (!ef.specifies_noexecstack()) {
++      if (!is_init_completed()) {
++        os::Linux::_stack_is_executable = true;
++        // This is OK - No Java threads have been created yet, and hence no
++        // stack guard pages to fix.
++        //
++        // This should happen only when you are building JDK7 using a very
++        // old version of JDK6 (e.g., with JPRT) and running test_gamma.
++        //
++        // Dynamic loader will make all stacks executable after
++        // this function returns, and will not do that again.
++        assert(Threads::first() == NULL, "no Java threads should exist yet.");
++      } else {
++        warning("You have loaded library %s which might have disabled stack guard. "
++                "The VM will try to fix the stack guard now.\n"
++                "It's highly recommended that you fix the library with "
++                "'execstack -c <libfile>', or link it with '-z noexecstack'.",
++                filename);
++
++        assert(Thread::current()->is_Java_thread(), "must be Java thread");
++        JavaThread *jt = JavaThread::current();
++        if (jt->thread_state() != _thread_in_native) {
++          // This happens when a compiler thread tries to load a hsdis-<arch>.so file
++          // that requires ExecStack. Cannot enter safe point. Let's give up.
++          warning("Unable to fix stack guard. Giving up.");
++        } else {
++          if (!LoadExecStackDllInVMThread) {
++            // This is for the case where the DLL has an static
++            // constructor function that executes JNI code. We cannot
++            // load such DLLs in the VMThread.
++            result = os::Linux::dlopen_helper(filename, ebuf, ebuflen);
++          }
++
++          ThreadInVMfromNative tiv(jt);
++          debug_only(VMNativeEntryWrapper vew;)
++
++          VM_LinuxDllLoad op(filename, ebuf, ebuflen);
++          VMThread::execute(&op);
++          if (LoadExecStackDllInVMThread) {
++            result = op.loaded_library();
++          }
++          load_attempted = true;
++        }
++      }
++    }
++  }
++
++  if (!load_attempted) {
++    result = os::Linux::dlopen_helper(filename, ebuf, ebuflen);
++  }
++
++  if (result != NULL) {
++    // Successful loading
++    return result;
++  }
++
++  Elf32_Ehdr elf_head;
++  int diag_msg_max_length=ebuflen-strlen(ebuf);
++  char* diag_msg_buf=ebuf+strlen(ebuf);
++
++  if (diag_msg_max_length==0) {
++    // No more space in ebuf for additional diagnostics message
++    return NULL;
++  }
++
++
++  int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK);
++
++  if (file_descriptor < 0) {
++    // Can't open library, report dlerror() message
++    return NULL;
++  }
++
++  bool failed_to_read_elf_head=
++    (sizeof(elf_head)!=
++        (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ;
++
++  ::close(file_descriptor);
++  if (failed_to_read_elf_head) {
++    // file i/o error - report dlerror() msg
++    return NULL;
++  }
++
++  typedef struct {
++    Elf32_Half  code;         // Actual value as defined in elf.h
++    Elf32_Half  compat_class; // Compatibility of archs at VM's sense
++    char        elf_class;    // 32 or 64 bit
++    char        endianess;    // MSB or LSB
++    char*       name;         // String representation
++  } arch_t;
++
++  #ifndef EM_486
++  #define EM_486          6               /* Intel 80486 */
++  #endif
++
++  static const arch_t arch_array[]={
++    {EM_386,         EM_386,     ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
++    {EM_486,         EM_386,     ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"},
++    {EM_IA_64,       EM_IA_64,   ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"},
++    {EM_X86_64,      EM_X86_64,  ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"},
++    {EM_SPARC,       EM_SPARC,   ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
++    {EM_SPARC32PLUS, EM_SPARC,   ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"},
++    {EM_SPARCV9,     EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"},
++    {EM_PPC,         EM_PPC,     ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"},
++    {EM_PPC64,       EM_PPC64,   ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"},
++    {EM_ARM,         EM_ARM,     ELFCLASS32,   ELFDATA2LSB, (char*)"ARM"},
++    {EM_S390,        EM_S390,    ELFCLASSNONE, ELFDATA2MSB, (char*)"IBM System/390"},
++    {EM_ALPHA,       EM_ALPHA,   ELFCLASS64, ELFDATA2LSB, (char*)"Alpha"},
++    {EM_MIPS_RS3_LE, EM_MIPS_RS3_LE, ELFCLASS32, ELFDATA2LSB, (char*)"MIPSel"},
++    {EM_MIPS,        EM_MIPS,    ELFCLASS32, ELFDATA2MSB, (char*)"MIPS"},
++    {EM_PARISC,      EM_PARISC,  ELFCLASS32, ELFDATA2MSB, (char*)"PARISC"},
++    {EM_68K,         EM_68K,     ELFCLASS32, ELFDATA2MSB, (char*)"M68k"},
++    {EM_SH,          EM_SH,      ELFCLASS32, ELFDATA2LSB, (char*)"SH"}, /* Support little endian only*/
++    {EM_AARCH64,     EM_AARCH64, ELFCLASS64, ELFDATA2LSB, (char*)"AARCH64"} /* Support little endian only*/
++  };
++
++  #if  (defined IA32)
++    static  Elf32_Half running_arch_code=EM_386;
++  #elif   (defined AMD64)
++    static  Elf32_Half running_arch_code=EM_X86_64;
++  #elif  (defined IA64)
++    static  Elf32_Half running_arch_code=EM_IA_64;
++  #elif  (defined __sparc) && (defined _LP64)
++    static  Elf32_Half running_arch_code=EM_SPARCV9;
++  #elif  (defined __sparc) && (!defined _LP64)
++    static  Elf32_Half running_arch_code=EM_SPARC;
++  #elif  (defined __powerpc64__)
++    static  Elf32_Half running_arch_code=EM_PPC64;
++  #elif  (defined __powerpc__)
++    static  Elf32_Half running_arch_code=EM_PPC;
++  #elif  (defined ARM)
++    static  Elf32_Half running_arch_code=EM_ARM;
++  #elif  (defined S390)
++    static  Elf32_Half running_arch_code=EM_S390;
++  #elif  (defined ALPHA)
++    static  Elf32_Half running_arch_code=EM_ALPHA;
++  #elif  (defined MIPSEL)
++    static  Elf32_Half running_arch_code=EM_MIPS_RS3_LE;
++  #elif  (defined PARISC)
++    static  Elf32_Half running_arch_code=EM_PARISC;
++  #elif  (defined MIPS)
++    static  Elf32_Half running_arch_code=EM_MIPS;
++  #elif  (defined M68K)
++    static  Elf32_Half running_arch_code=EM_68K;
++  #elif  (defined SH)
++    static  Elf32_Half running_arch_code=EM_SH;
++  #elif  (defined AARCH64)
++    static  Elf32_Half running_arch_code=EM_AARCH64;
++  #else
++    #error Method os::dll_load requires that one of following is defined:\
++         IA32, AMD64, IA64, __sparc, __powerpc__, ARM, S390, ALPHA, MIPS, MIPSEL, PARISC, M68K, SH
++  #endif
++
++  // Identify compatability class for VM's architecture and library's architecture
++  // Obtain string descriptions for architectures
++
++  arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL};
++  int running_arch_index=-1;
++
++  for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) {
++    if (running_arch_code == arch_array[i].code) {
++      running_arch_index    = i;
++    }
++    if (lib_arch.code == arch_array[i].code) {
++      lib_arch.compat_class = arch_array[i].compat_class;
++      lib_arch.name         = arch_array[i].name;
++    }
++  }
++
++  assert(running_arch_index != -1,
++    "Didn't find running architecture code (running_arch_code) in arch_array");
++  if (running_arch_index == -1) {
++    // Even though running architecture detection failed
++    // we may still continue with reporting dlerror() message
++    return NULL;
++  }
++
++  if (lib_arch.endianess != arch_array[running_arch_index].endianess) {
++    ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)");
++    return NULL;
++  }
++
++#ifndef S390
++  if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) {
++    ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)");
++    return NULL;
++  }
++#endif // !S390
++
++  if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) {
++    if ( lib_arch.name!=NULL ) {
++      ::snprintf(diag_msg_buf, diag_msg_max_length-1,
++        " (Possible cause: can't load %s-bit .so on a %s-bit platform)",
++        lib_arch.name, arch_array[running_arch_index].name);
++    } else {
++      ::snprintf(diag_msg_buf, diag_msg_max_length-1,
++      " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)",
++        lib_arch.code,
++        arch_array[running_arch_index].name);
++    }
++  }
++
++  return NULL;
++}
++
++void * os::Linux::dlopen_helper(const char *filename, char *ebuf, int ebuflen) {
++  void * result = ::dlopen(filename, RTLD_LAZY);
++  if (result == NULL) {
++    ::strncpy(ebuf, ::dlerror(), ebuflen - 1);
++    ebuf[ebuflen-1] = '\0';
++  }
++  return result;
++}
++
++void * os::Linux::dll_load_in_vmthread(const char *filename, char *ebuf, int ebuflen) {
++  void * result = NULL;
++  if (LoadExecStackDllInVMThread) {
++    result = dlopen_helper(filename, ebuf, ebuflen);
++  }
++
++  // Since 7019808, libjvm.so is linked with -noexecstack. If the VM loads a
++  // library that requires an executable stack, or which does not have this
++  // stack attribute set, dlopen changes the stack attribute to executable. The
++  // read protection of the guard pages gets lost.
++  //
++  // Need to check _stack_is_executable again as multiple VM_LinuxDllLoad
++  // may have been queued at the same time.
++
++  if (!_stack_is_executable) {
++    JavaThread *jt = Threads::first();
++
++    while (jt) {
++      if (!jt->stack_guard_zone_unused() &&        // Stack not yet fully initialized
++          jt->stack_yellow_zone_enabled()) {       // No pending stack overflow exceptions
++        if (!os::guard_memory((char *) jt->stack_red_zone_base() - jt->stack_red_zone_size(),
++                              jt->stack_yellow_zone_size() + jt->stack_red_zone_size())) {
++          warning("Attempt to reguard stack yellow zone failed.");
++        }
++      }
++      jt = jt->next();
++    }
++  }
++
++  return result;
++}
++
++/*
++ * glibc-2.0 libdl is not MT safe.  If you are building with any glibc,
++ * chances are you might want to run the generated bits against glibc-2.0
++ * libdl.so, so always use locking for any version of glibc.
++ */
++void* os::dll_lookup(void* handle, const char* name) {
++  pthread_mutex_lock(&dl_mutex);
++  void* res = dlsym(handle, name);
++  pthread_mutex_unlock(&dl_mutex);
++  return res;
++}
++
++
++static bool _print_ascii_file(const char* filename, outputStream* st) {
++  int fd = ::open(filename, O_RDONLY);
++  if (fd == -1) {
++     return false;
++  }
++
++  char buf[32];
++  int bytes;
++  while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
++    st->print_raw(buf, bytes);
++  }
++
++  ::close(fd);
++
++  return true;
++}
++
++bool _print_lsb_file(const char* filename, outputStream* st) {
++  int fd = open(filename, O_RDONLY);
++  if (fd == -1) {
++     return false;
++  }
++
++  char buf[512], *d_i, *d_r, *d_c;
++  int bytes;
++
++  if ((bytes = read(fd, buf, sizeof(buf)-1)) == sizeof(buf)-1) {
++     close(fd);
++     return false;
++  }
++  close(fd);
++
++  buf[bytes] = '\n';
++  buf[bytes+1] = '\0';
++  d_i = strstr(buf, "DISTRIB_ID=");
++  d_r = strstr(buf, "DISTRIB_RELEASE=");
++  d_c = strstr(buf, "DISTRIB_CODENAME=");
++  if (!d_i || !d_r || !d_c) {
++     return false;
++  }
++  d_i = strchr(d_i, '=') + 1;  *strchrnul(d_i, '\n') = '\0';
++  d_r = strchr(d_r, '=') + 1;  *strchrnul(d_r, '\n') = '\0';
++  d_c = strchr(d_c, '=') + 1;  *strchrnul(d_c, '\n') = '\0';
++  st->print("%s %s (%s)", d_i, d_r, d_c);
++
++  return true;
++}
++
++void os::print_dll_info(outputStream *st) {
++   st->print_cr("Dynamic libraries:");
++
++   char fname[32];
++   pid_t pid = os::Linux::gettid();
++
++   jio_snprintf(fname, sizeof(fname), "/proc/%d/maps", pid);
++
++   if (!_print_ascii_file(fname, st)) {
++     st->print("Can not get library information for pid = %d\n", pid);
++   }
++}
++
++void os::print_os_info_brief(outputStream* st) {
++  os::Linux::print_distro_info(st);
++
++  os::Posix::print_uname_info(st);
++
++  os::Linux::print_libversion_info(st);
++
++}
++
++void os::print_os_info(outputStream* st) {
++  st->print("OS:");
++
++  os::Linux::print_distro_info(st);
++
++  os::Posix::print_uname_info(st);
++
++  // Print warning if unsafe chroot environment detected
++  if (unsafe_chroot_detected) {
++    st->print("WARNING!! ");
++    st->print_cr(unstable_chroot_error);
++  }
++
++  os::Linux::print_libversion_info(st);
++
++  os::Posix::print_rlimit_info(st);
++
++  os::Posix::print_load_average(st);
++
++  os::Linux::print_full_memory_info(st);
++}
++
++// Try to identify popular distros.
++// Most Linux distributions have /etc/XXX-release file, which contains
++// the OS version string. Some have more than one /etc/XXX-release file
++// (e.g. Mandrake has both /etc/mandrake-release and /etc/redhat-release.),
++// so the order is important.
++void os::Linux::print_distro_info(outputStream* st) {
++  if (!_print_ascii_file("/etc/mandrake-release", st) &&
++      !_print_ascii_file("/etc/sun-release", st) &&
++      !_print_ascii_file("/etc/redhat-release", st) &&
++      !_print_ascii_file("/etc/SuSE-release", st) &&
++      !_print_ascii_file("/etc/turbolinux-release", st) &&
++      !_print_ascii_file("/etc/gentoo-release", st) &&
++      !_print_lsb_file("/etc/lsb-release", st) &&
++      !_print_ascii_file("/etc/debian_version", st) &&
++      !_print_ascii_file("/etc/ltib-release", st) &&
++      !_print_ascii_file("/etc/angstrom-version", st)) {
++      st->print("Linux");
++  }
++  st->cr();
++}
++
++void os::Linux::print_libversion_info(outputStream* st) {
++  // libc, pthread
++  st->print("libc:");
++  st->print(os::Linux::glibc_version()); st->print(" ");
++  st->print(os::Linux::libpthread_version()); st->print(" ");
++  if (os::Linux::is_LinuxThreads()) {
++     st->print("(%s stack)", os::Linux::is_floating_stack() ? "floating" : "fixed");
++  }
++  st->cr();
++}
++
++void os::Linux::print_full_memory_info(outputStream* st) {
++   st->print("\n/proc/meminfo:\n");
++   _print_ascii_file("/proc/meminfo", st);
++   st->cr();
++}
++
++void os::print_memory_info(outputStream* st) {
++
++  st->print("Memory:");
++  st->print(" %dk page", os::vm_page_size()>>10);
++
++  // values in struct sysinfo are "unsigned long"
++  struct sysinfo si;
++  sysinfo(&si);
++
++  st->print(", physical " UINT64_FORMAT "k",
++            os::physical_memory() >> 10);
++  st->print("(" UINT64_FORMAT "k free)",
++            os::available_memory() >> 10);
++  st->print(", swap " UINT64_FORMAT "k",
++            ((jlong)si.totalswap * si.mem_unit) >> 10);
++  st->print("(" UINT64_FORMAT "k free)",
++            ((jlong)si.freeswap * si.mem_unit) >> 10);
++  st->cr();
++}
++
++void os::pd_print_cpu_info(outputStream* st) {
++  st->print("\n/proc/cpuinfo:\n");
++  if (!_print_ascii_file("/proc/cpuinfo", st)) {
++    st->print("  <Not Available>");
++  }
++  st->cr();
++}
++
++// Taken from /usr/include/bits/siginfo.h  Supposed to be architecture specific
++// but they're the same for all the linux arch that we support
++// and they're the same for solaris but there's no common place to put this.
++const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR",
++                          "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG",
++                          "ILL_COPROC", "ILL_BADSTK" };
++
++const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV",
++                          "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES",
++                          "FPE_FLTINV", "FPE_FLTSUB", "FPE_FLTDEN" };
++
++const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" };
++
++const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" };
++
++void os::print_siginfo(outputStream* st, void* siginfo) {
++  st->print("siginfo:");
++
++  const int buflen = 100;
++  char buf[buflen];
++  siginfo_t *si = (siginfo_t*)siginfo;
++  st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen));
++  if (si->si_errno != 0 && strerror_r(si->si_errno, buf, buflen) == 0) {
++    st->print("si_errno=%s", buf);
++  } else {
++    st->print("si_errno=%d", si->si_errno);
++  }
++  const int c = si->si_code;
++  assert(c > 0, "unexpected si_code");
++  switch (si->si_signo) {
++  case SIGILL:
++    st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]);
++    st->print(", si_addr=" PTR_FORMAT, si->si_addr);
++    break;
++  case SIGFPE:
++    st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]);
++    st->print(", si_addr=" PTR_FORMAT, si->si_addr);
++    break;
++  case SIGSEGV:
++    st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]);
++    st->print(", si_addr=" PTR_FORMAT, si->si_addr);
++    break;
++  case SIGBUS:
++    st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]);
++    st->print(", si_addr=" PTR_FORMAT, si->si_addr);
++    break;
++  default:
++    st->print(", si_code=%d", si->si_code);
++    // no si_addr
++  }
++
++  if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) &&
++      UseSharedSpaces) {
++    FileMapInfo* mapinfo = FileMapInfo::current_info();
++    if (mapinfo->is_in_shared_space(si->si_addr)) {
++      st->print("\n\nError accessing class data sharing archive."   \
++                " Mapped file inaccessible during execution, "      \
++                " possible disk/network problem.");
++    }
++  }
++  st->cr();
++}
++
++
++static void print_signal_handler(outputStream* st, int sig,
++                                 char* buf, size_t buflen);
++
++void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
++  st->print_cr("Signal Handlers:");
++  print_signal_handler(st, SIGSEGV, buf, buflen);
++  print_signal_handler(st, SIGBUS , buf, buflen);
++  print_signal_handler(st, SIGFPE , buf, buflen);
++  print_signal_handler(st, SIGPIPE, buf, buflen);
++  print_signal_handler(st, SIGXFSZ, buf, buflen);
++  print_signal_handler(st, SIGILL , buf, buflen);
++  print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen);
++  print_signal_handler(st, SR_signum, buf, buflen);
++  print_signal_handler(st, SHUTDOWN1_SIGNAL, buf, buflen);
++  print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen);
++  print_signal_handler(st, SHUTDOWN3_SIGNAL , buf, buflen);
++  print_signal_handler(st, BREAK_SIGNAL, buf, buflen);
++}
++
++static char saved_jvm_path[MAXPATHLEN] = {0};
++
++// Find the full path to the current module, libjvm.so or libjvm_g.so
++void os::jvm_path(char *buf, jint buflen) {
++  // Error checking.
++  if (buflen < MAXPATHLEN) {
++    assert(false, "must use a large-enough buffer");
++    buf[0] = '\0';
++    return;
++  }
++  // Lazy resolve the path to current module.
++  if (saved_jvm_path[0] != 0) {
++    strcpy(buf, saved_jvm_path);
++    return;
++  }
++
++  char dli_fname[MAXPATHLEN];
++  bool ret = dll_address_to_library_name(
++                CAST_FROM_FN_PTR(address, os::jvm_path),
++                dli_fname, sizeof(dli_fname), NULL);
++  assert(ret, "cannot locate libjvm");
++  char *rp = NULL;
++  if (ret && dli_fname[0] != '\0') {
++    rp = realpath(dli_fname, buf);
++  }
++  if (rp == NULL)
++    return;
++
++  if (Arguments::created_by_gamma_launcher()) {
++    // Support for the gamma launcher.  Typical value for buf is
++    // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so".  If "/jre/lib/" appears at
++    // the right place in the string, then assume we are installed in a JDK and
++    // we're done.  Otherwise, check for a JAVA_HOME environment variable and fix
++    // up the path so it looks like libjvm.so is installed there (append a
++    // fake suffix hotspot/libjvm.so).
++    const char *p = buf + strlen(buf) - 1;
++    for (int count = 0; p > buf && count < 5; ++count) {
++      for (--p; p > buf && *p != '/'; --p)
++        /* empty */ ;
++    }
++
++    if (strncmp(p, "/jre/lib/", 9) != 0) {
++      // Look for JAVA_HOME in the environment.
++      char* java_home_var = ::getenv("JAVA_HOME");
++      if (java_home_var != NULL && java_home_var[0] != 0) {
++        char* jrelib_p;
++        int len;
++
++        // Check the current module name "libjvm.so" or "libjvm_g.so".
++        p = strrchr(buf, '/');
++        assert(strstr(p, "/libjvm") == p, "invalid library name");
++        p = strstr(p, "_g") ? "_g" : "";
++
++        rp = realpath(java_home_var, buf);
++        if (rp == NULL)
++          return;
++
++        // determine if this is a legacy image or modules image
++        // modules image doesn't have "jre" subdirectory
++        len = strlen(buf);
++        jrelib_p = buf + len;
++        snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch);
++        if (0 != access(buf, F_OK)) {
++          snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch);
++        }
++
++        if (0 == access(buf, F_OK)) {
++          // Use current module name "libjvm[_g].so" instead of
++          // "libjvm"debug_only("_g")".so" since for fastdebug version
++          // we should have "libjvm.so" but debug_only("_g") adds "_g"!
++          len = strlen(buf);
++          snprintf(buf + len, buflen-len, "/hotspot/libjvm%s.so", p);
++        } else {
++          // Go back to path of .so
++          rp = realpath(dli_fname, buf);
++          if (rp == NULL)
++            return;
++        }
++      }
++    }
++  }
++
++  strcpy(saved_jvm_path, buf);
++}
++
++void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
++  // no prefix required, not even "_"
++}
++
++void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
++  // no suffix required
++}
++
++////////////////////////////////////////////////////////////////////////////////
++// sun.misc.Signal support
++
++static volatile jint sigint_count = 0;
++
++static void
++UserHandler(int sig, void *siginfo, void *context) {
++  // 4511530 - sem_post is serialized and handled by the manager thread. When
++  // the program is interrupted by Ctrl-C, SIGINT is sent to every thread. We
++  // don't want to flood the manager thread with sem_post requests.
++  if (sig == SIGINT && Atomic::add(1, &sigint_count) > 1)
++      return;
++
++  // Ctrl-C is pressed during error reporting, likely because the error
++  // handler fails to abort. Let VM die immediately.
++  if (sig == SIGINT && is_error_reported()) {
++     os::die();
++  }
++
++  os::signal_notify(sig);
++}
++
++void* os::user_handler() {
++  return CAST_FROM_FN_PTR(void*, UserHandler);
++}
++
++class Semaphore : public StackObj {
++  public:
++    Semaphore();
++    ~Semaphore();
++    void signal();
++    void wait();
++    bool trywait();
++    bool timedwait(unsigned int sec, int nsec);
++  private:
++    sem_t _semaphore;
++};
++
++
++Semaphore::Semaphore() {
++  sem_init(&_semaphore, 0, 0);
++}
++
++Semaphore::~Semaphore() {
++  sem_destroy(&_semaphore);
++}
++
++void Semaphore::signal() {
++  sem_post(&_semaphore);
++}
++
++void Semaphore::wait() {
++  sem_wait(&_semaphore);
++}
++
++bool Semaphore::trywait() {
++  return sem_trywait(&_semaphore) == 0;
++}
++
++bool Semaphore::timedwait(unsigned int sec, int nsec) {
++  struct timespec ts;
++  unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec);
++
++  while (1) {
++    int result = sem_timedwait(&_semaphore, &ts);
++    if (result == 0) {
++      return true;
++    } else if (errno == EINTR) {
++      continue;
++    } else if (errno == ETIMEDOUT) {
++      return false;
++    } else {
++      return false;
++    }
++  }
++}
++
++extern "C" {
++  typedef void (*sa_handler_t)(int);
++  typedef void (*sa_sigaction_t)(int, siginfo_t *, void *);
++}
++
++void* os::signal(int signal_number, void* handler) {
++  struct sigaction sigAct, oldSigAct;
++
++  sigfillset(&(sigAct.sa_mask));
++  sigAct.sa_flags   = SA_RESTART|SA_SIGINFO;
++  sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler);
++
++  if (sigaction(signal_number, &sigAct, &oldSigAct)) {
++    // -1 means registration failed
++    return (void *)-1;
++  }
++
++  return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler);
++}
++
++void os::signal_raise(int signal_number) {
++  ::raise(signal_number);
++}
++
++/*
++ * The following code is moved from os.cpp for making this
++ * code platform specific, which it is by its very nature.
++ */
++
++// Will be modified when max signal is changed to be dynamic
++int os::sigexitnum_pd() {
++  return NSIG;
++}
++
++// a counter for each possible signal value
++static volatile jint pending_signals[NSIG+1] = { 0 };
++
++// Linux(POSIX) specific hand shaking semaphore.
++static sem_t sig_sem;
++static Semaphore sr_semaphore;
++
++void os::signal_init_pd() {
++  // Initialize signal structures
++  ::memset((void*)pending_signals, 0, sizeof(pending_signals));
++
++  // Initialize signal semaphore
++  ::sem_init(&sig_sem, 0, 0);
++}
++
++void os::signal_notify(int sig) {
++  Atomic::inc(&pending_signals[sig]);
++  ::sem_post(&sig_sem);
++}
++
++static int check_pending_signals(bool wait) {
++  Atomic::store(0, &sigint_count);
++  for (;;) {
++    for (int i = 0; i < NSIG + 1; i++) {
++      jint n = pending_signals[i];
++      if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
++        return i;
++      }
++    }
++    if (!wait) {
++      return -1;
++    }
++    JavaThread *thread = JavaThread::current();
++    ThreadBlockInVM tbivm(thread);
++
++    bool threadIsSuspended;
++    do {
++      thread->set_suspend_equivalent();
++      // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
++      ::sem_wait(&sig_sem);
++
++      // were we externally suspended while we were waiting?
++      threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
++      if (threadIsSuspended) {
++        //
++        // The semaphore has been incremented, but while we were waiting
++        // another thread suspended us. We don't want to continue running
++        // while suspended because that would surprise the thread that
++        // suspended us.
++        //
++        ::sem_post(&sig_sem);
++
++        thread->java_suspend_self();
++      }
++    } while (threadIsSuspended);
++  }
++}
++
++int os::signal_lookup() {
++  return check_pending_signals(false);
++}
++
++int os::signal_wait() {
++  return check_pending_signals(true);
++}
++
++////////////////////////////////////////////////////////////////////////////////
++// Virtual Memory
++
++int os::vm_page_size() {
++  // Seems redundant as all get out
++  assert(os::Linux::page_size() != -1, "must call os::init");
++  return os::Linux::page_size();
++}
++
++// Solaris allocates memory by pages.
++int os::vm_allocation_granularity() {
++  assert(os::Linux::page_size() != -1, "must call os::init");
++  return os::Linux::page_size();
++}
++
++// Rationale behind this function:
++//  current (Mon Apr 25 20:12:18 MSD 2005) oprofile drops samples without executable
++//  mapping for address (see lookup_dcookie() in the kernel module), thus we cannot get
++//  samples for JITted code. Here we create private executable mapping over the code cache
++//  and then we can use standard (well, almost, as mapping can change) way to provide
++//  info for the reporting script by storing timestamp and location of symbol
++void linux_wrap_code(char* base, size_t size) {
++  static volatile jint cnt = 0;
++
++  if (!UseOprofile) {
++    return;
++  }
++
++  char buf[PATH_MAX+1];
++  int num = Atomic::add(1, &cnt);
++
++  snprintf(buf, sizeof(buf), "%s/hs-vm-%d-%d",
++           os::get_temp_directory(), os::current_process_id(), num);
++  unlink(buf);
++
++  int fd = ::open(buf, O_CREAT | O_RDWR, S_IRWXU);
++
++  if (fd != -1) {
++    off_t rv = ::lseek(fd, size-2, SEEK_SET);
++    if (rv != (off_t)-1) {
++      if (::write(fd, "", 1) == 1) {
++        mmap(base, size,
++             PROT_READ|PROT_WRITE|PROT_EXEC,
++             MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, fd, 0);
++      }
++    }
++    ::close(fd);
++    unlink(buf);
++  }
++}
++
++static bool recoverable_mmap_error(int err) {
++  // See if the error is one we can let the caller handle. This
++  // list of errno values comes from JBS-6843484. I can't find a
++  // Linux man page that documents this specific set of errno
++  // values so while this list currently matches Solaris, it may
++  // change as we gain experience with this failure mode.
++  switch (err) {
++  case EBADF:
++  case EINVAL:
++  case ENOTSUP:
++    // let the caller deal with these errors
++    return true;
++
++  default:
++    // Any remaining errors on this OS can cause our reserved mapping
++    // to be lost. That can cause confusion where different data
++    // structures think they have the same memory mapped. The worst
++    // scenario is if both the VM and a library think they have the
++    // same memory mapped.
++    return false;
++  }
++}
++
++static void warn_fail_commit_memory(char* addr, size_t size, bool exec,
++                                    int err) {
++  warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
++          ", %d) failed; error='%s' (errno=%d)", addr, size, exec,
++          strerror(err), err);
++}
++
++static void warn_fail_commit_memory(char* addr, size_t size,
++                                    size_t alignment_hint, bool exec,
++                                    int err) {
++  warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
++          ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, size,
++          alignment_hint, exec, strerror(err), err);
++}
++
++static void warn_fail_commit_memory(char* addr, size_t size,
++                                    size_t alignment_hint, bool exec,
++                                    int err, const char* msg) {
++  warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
++          ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d); %s", addr, size,
++          alignment_hint, exec, strerror(err), err, msg);
++}
++
++// NOTE: Linux kernel does not really reserve the pages for us.
++//       All it does is to check if there are enough free pages
++//       left at the time of mmap(). This could be a potential
++//       problem.
++int os::Linux::commit_memory_impl(char* addr, size_t size, bool exec) {
++  int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
++  uintptr_t res = (uintptr_t) ::mmap(addr, size, prot,
++                                   MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0);
++  if (res != (uintptr_t) MAP_FAILED) {
++    if (UseNUMAInterleaving) {
++      numa_make_global(addr, size);
++    }
++    return 0;
++  }
++
++  int err = errno;  // save errno from mmap() call above
++
++  if (!recoverable_mmap_error(err)) {
++    warn_fail_commit_memory(addr, size, exec, err);
++    vm_exit_out_of_memory(size, "committing reserved memory.");
++  }
++
++  return err;
++}
++
++bool os::pd_commit_memory(char* addr, size_t size, bool exec) {
++  return os::Linux::commit_memory_impl(addr, size, exec) == 0;
++}
++
++void os::pd_commit_memory_or_exit(char* addr, size_t size, bool exec,
++                                  const char* mesg) {
++  assert(mesg != NULL, "mesg must be specified");
++  int err = os::Linux::commit_memory_impl(addr, size, exec);
++  if (err != 0) {
++    // the caller wants all commit errors to exit with the specified mesg:
++    warn_fail_commit_memory(addr, size, exec, err);
++    vm_exit_out_of_memory(size, mesg);
++  }
++}
++
++// Define MAP_HUGETLB here so we can build HotSpot on old systems.
++#ifndef MAP_HUGETLB
++#define MAP_HUGETLB 0x40000
++#endif
++
++// Define MADV_HUGEPAGE here so we can build HotSpot on old systems.
++#ifndef MADV_HUGEPAGE
++#define MADV_HUGEPAGE 14
++#endif
++
++volatile jint os::Linux::num_largepage_commit_fails = 0;
++
++int os::Linux::commit_memory_impl(char* addr, size_t size,
++                                  size_t alignment_hint, bool exec) {
++  int err;
++  if (UseHugeTLBFS && alignment_hint > (size_t)vm_page_size()) {
++    int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE;
++    uintptr_t res =
++      (uintptr_t) ::mmap(addr, size, prot,
++                         MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|MAP_HUGETLB,
++                         -1, 0);
++    if (res != (uintptr_t) MAP_FAILED) {
++      if (UseNUMAInterleaving) {
++        numa_make_global(addr, size);
++      }
++      return 0;
++    }
++
++    err = errno;  // save errno from mmap() call above
++
++    if (!recoverable_mmap_error(err)) {
++      // However, it is not clear that this loss of our reserved mapping
++      // happens with large pages on Linux or that we cannot recover
++      // from the loss. For now, we just issue a warning and we don't
++      // call vm_exit_out_of_memory(). This issue is being tracked by
++      // JBS-8007074.
++      Atomic::inc(&os::Linux::num_largepage_commit_fails);
++      warn_fail_commit_memory(addr, size, alignment_hint, exec, err,
++        "Cannot allocate large pages, falling back to regular pages");
++//    vm_exit_out_of_memory(size, "committing reserved memory.");
++    }
++    // Fall through and try to use small pages
++  }
++
++  err = os::Linux::commit_memory_impl(addr, size, exec);
++  if (err == 0) {
++    realign_memory(addr, size, alignment_hint);
++  }
++  return err;
++}
++
++bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint,
++                          bool exec) {
++  return os::Linux::commit_memory_impl(addr, size, alignment_hint, exec) == 0;
++}
++
++void os::pd_commit_memory_or_exit(char* addr, size_t size,
++                                  size_t alignment_hint, bool exec,
++                                  const char* mesg) {
++  assert(mesg != NULL, "mesg must be specified");
++  int err = os::Linux::commit_memory_impl(addr, size, alignment_hint, exec);
++  if (err != 0) {
++    // the caller wants all commit errors to exit with the specified mesg:
++    warn_fail_commit_memory(addr, size, alignment_hint, exec, err);
++    vm_exit_out_of_memory(size, mesg);
++  }
++}
++
++void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
++  if (UseHugeTLBFS && alignment_hint > (size_t)vm_page_size()) {
++    // We don't check the return value: madvise(MADV_HUGEPAGE) may not
++    // be supported or the memory may already be backed by huge pages.
++    ::madvise(addr, bytes, MADV_HUGEPAGE);
++  }
++}
++
++void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) {
++  // This method works by doing an mmap over an existing mmaping and effectively discarding
++  // the existing pages. However it won't work for SHM-based large pages that cannot be
++  // uncommitted at all. We don't do anything in this case to avoid creating a segment with
++  // small pages on top of the SHM segment. This method always works for small pages, so we
++  // allow that in any case.
++  if (alignment_hint <= (size_t)os::vm_page_size() || !UseSHM) {
++    commit_memory(addr, bytes, alignment_hint, !ExecMem);
++  }
++}
++
++void os::numa_make_global(char *addr, size_t bytes) {
++  Linux::numa_interleave_memory(addr, bytes);
++}
++
++void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) {
++  Linux::numa_tonode_memory(addr, bytes, lgrp_hint);
++}
++
++bool os::numa_topology_changed()   { return false; }
++
++size_t os::numa_get_groups_num() {
++  int max_node = Linux::numa_max_node();
++  return max_node > 0 ? max_node + 1 : 1;
++}
++
++int os::numa_get_group_id() {
++  int cpu_id = Linux::sched_getcpu();
++  if (cpu_id != -1) {
++    int lgrp_id = Linux::get_node_by_cpu(cpu_id);
++    if (lgrp_id != -1) {
++      return lgrp_id;
++    }
++  }
++  return 0;
++}
++
++size_t os::numa_get_leaf_groups(int *ids, size_t size) {
++  for (size_t i = 0; i < size; i++) {
++    ids[i] = i;
++  }
++  return size;
++}
++
++bool os::get_page_info(char *start, page_info* info) {
++  return false;
++}
++
++char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
++  return end;
++}
++
++
++int os::Linux::sched_getcpu_syscall(void) {
++  unsigned int cpu;
++  int retval = -1;
++
++#if defined(IA32)
++# ifndef SYS_getcpu
++# define SYS_getcpu 318
++# endif
++  retval = syscall(SYS_getcpu, &cpu, NULL, NULL);
++#elif defined(AMD64)
++// Unfortunately we have to bring all these macros here from vsyscall.h
++// to be able to compile on old linuxes.
++# define __NR_vgetcpu 2
++# define VSYSCALL_START (-10UL << 20)
++# define VSYSCALL_SIZE 1024
++# define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr))
++  typedef long (*vgetcpu_t)(unsigned int *cpu, unsigned int *node, unsigned long *tcache);
++  vgetcpu_t vgetcpu = (vgetcpu_t)VSYSCALL_ADDR(__NR_vgetcpu);
++  retval = vgetcpu(&cpu, NULL, NULL);
++#endif
++
++  return (retval == -1) ? retval : cpu;
++}
++
++// Something to do with the numa-aware allocator needs these symbols
++extern "C" JNIEXPORT void numa_warn(int number, char *where, ...) { }
++extern "C" JNIEXPORT void numa_error(char *where) { }
++extern "C" JNIEXPORT int fork1() { return fork(); }
++
++
++// If we are running with libnuma version > 2, then we should
++// be trying to use symbols with versions 1.1
++// If we are running with earlier version, which did not have symbol versions,
++// we should use the base version.
++void* os::Linux::libnuma_dlsym(void* handle, const char *name) {
++  void *f = dlvsym(handle, name, "libnuma_1.1");
++  if (f == NULL) {
++    f = dlsym(handle, name);
++  }
++  return f;
++}
++
++bool os::Linux::libnuma_init() {
++  // sched_getcpu() should be in libc.
++  set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t,
++                                  dlsym(RTLD_DEFAULT, "sched_getcpu")));
++
++  // If it's not, try a direct syscall.
++  if (sched_getcpu() == -1)
++    set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, (void*)&sched_getcpu_syscall));
++
++  if (sched_getcpu() != -1) { // Does it work?
++    void *handle = dlopen("libnuma.so.1", RTLD_LAZY);
++    if (handle != NULL) {
++      set_numa_node_to_cpus(CAST_TO_FN_PTR(numa_node_to_cpus_func_t,
++                                           libnuma_dlsym(handle, "numa_node_to_cpus")));
++      set_numa_max_node(CAST_TO_FN_PTR(numa_max_node_func_t,
++                                       libnuma_dlsym(handle, "numa_max_node")));
++      set_numa_available(CAST_TO_FN_PTR(numa_available_func_t,
++                                        libnuma_dlsym(handle, "numa_available")));
++      set_numa_tonode_memory(CAST_TO_FN_PTR(numa_tonode_memory_func_t,
++                                            libnuma_dlsym(handle, "numa_tonode_memory")));
++      set_numa_interleave_memory(CAST_TO_FN_PTR(numa_interleave_memory_func_t,
++                                            libnuma_dlsym(handle, "numa_interleave_memory")));
++
++
++      if (numa_available() != -1) {
++        set_numa_all_nodes((unsigned long*)libnuma_dlsym(handle, "numa_all_nodes"));
++        // Create a cpu -> node mapping
++        _cpu_to_node = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<int>(0, true);
++        rebuild_cpu_to_node_map();
++        return true;
++      }
++    }
++  }
++  return false;
++}
++
++// rebuild_cpu_to_node_map() constructs a table mapping cpud id to node id.
++// The table is later used in get_node_by_cpu().
++void os::Linux::rebuild_cpu_to_node_map() {
++  const size_t NCPUS = 32768; // Since the buffer size computation is very obscure
++                              // in libnuma (possible values are starting from 16,
++                              // and continuing up with every other power of 2, but less
++                              // than the maximum number of CPUs supported by kernel), and
++                              // is a subject to change (in libnuma version 2 the requirements
++                              // are more reasonable) we'll just hardcode the number they use
++                              // in the library.
++  const size_t BitsPerCLong = sizeof(long) * CHAR_BIT;
++
++  size_t cpu_num = os::active_processor_count();
++  size_t cpu_map_size = NCPUS / BitsPerCLong;
++  size_t cpu_map_valid_size =
++    MIN2((cpu_num + BitsPerCLong - 1) / BitsPerCLong, cpu_map_size);
++
++  cpu_to_node()->clear();
++  cpu_to_node()->at_grow(cpu_num - 1);
++  size_t node_num = numa_get_groups_num();
++
++  unsigned long *cpu_map = NEW_C_HEAP_ARRAY(unsigned long, cpu_map_size, mtInternal);
++  for (size_t i = 0; i < node_num; i++) {
++    if (numa_node_to_cpus(i, cpu_map, cpu_map_size * sizeof(unsigned long)) != -1) {
++      for (size_t j = 0; j < cpu_map_valid_size; j++) {
++        if (cpu_map[j] != 0) {
++          for (size_t k = 0; k < BitsPerCLong; k++) {
++            if (cpu_map[j] & (1UL << k)) {
++              cpu_to_node()->at_put(j * BitsPerCLong + k, i);
++            }
++          }
++        }
++      }
++    }
++  }
++  FREE_C_HEAP_ARRAY(unsigned long, cpu_map, mtInternal);
++}
++
++int os::Linux::get_node_by_cpu(int cpu_id) {
++  if (cpu_to_node() != NULL && cpu_id >= 0 && cpu_id < cpu_to_node()->length()) {
++    return cpu_to_node()->at(cpu_id);
++  }
++  return -1;
++}
++
++GrowableArray<int>* os::Linux::_cpu_to_node;
++os::Linux::sched_getcpu_func_t os::Linux::_sched_getcpu;
++os::Linux::numa_node_to_cpus_func_t os::Linux::_numa_node_to_cpus;
++os::Linux::numa_max_node_func_t os::Linux::_numa_max_node;
++os::Linux::numa_available_func_t os::Linux::_numa_available;
++os::Linux::numa_tonode_memory_func_t os::Linux::_numa_tonode_memory;
++os::Linux::numa_interleave_memory_func_t os::Linux::_numa_interleave_memory;
++unsigned long* os::Linux::_numa_all_nodes;
++
++bool os::pd_uncommit_memory(char* addr, size_t size) {
++  uintptr_t res = (uintptr_t) ::mmap(addr, size, PROT_NONE,
++                MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0);
++  return res  != (uintptr_t) MAP_FAILED;
++}
++
++static
++address get_stack_commited_bottom(address bottom, size_t size) {
++  address nbot = bottom;
++  address ntop = bottom + size;
++
++  size_t page_sz = os::vm_page_size();
++  unsigned pages = size / page_sz;
++
++  unsigned char vec[1];
++  unsigned imin = 1, imax = pages + 1, imid;
++  int mincore_return_value;
++
++  while (imin < imax) {
++    imid = (imax + imin) / 2;
++    nbot = ntop - (imid * page_sz);
++
++    // Use a trick with mincore to check whether the page is mapped or not.
++    // mincore sets vec to 1 if page resides in memory and to 0 if page
++    // is swapped output but if page we are asking for is unmapped
++    // it returns -1,ENOMEM
++    mincore_return_value = mincore(nbot, page_sz, vec);
++
++    if (mincore_return_value == -1) {
++      // Page is not mapped go up
++      // to find first mapped page
++      if (errno != EAGAIN) {
++        assert(errno == ENOMEM, "Unexpected mincore errno");
++        imax = imid;
++      }
++    } else {
++      // Page is mapped go down
++      // to find first not mapped page
++      imin = imid + 1;
++    }
++  }
++
++  nbot = nbot + page_sz;
++
++  // Adjust stack bottom one page up if last checked page is not mapped
++  if (mincore_return_value == -1) {
++    nbot = nbot + page_sz;
++  }
++
++  return nbot;
++}
++
++
++// Linux uses a growable mapping for the stack, and if the mapping for
++// the stack guard pages is not removed when we detach a thread the
++// stack cannot grow beyond the pages where the stack guard was
++// mapped.  If at some point later in the process the stack expands to
++// that point, the Linux kernel cannot expand the stack any further
++// because the guard pages are in the way, and a segfault occurs.
++//
++// However, it's essential not to split the stack region by unmapping
++// a region (leaving a hole) that's already part of the stack mapping,
++// so if the stack mapping has already grown beyond the guard pages at
++// the time we create them, we have to truncate the stack mapping.
++// So, we need to know the extent of the stack mapping when
++// create_stack_guard_pages() is called.
++
++// We only need this for stacks that are growable: at the time of
++// writing thread stacks don't use growable mappings (i.e. those
++// creeated with MAP_GROWSDOWN), and aren't marked "[stack]", so this
++// only applies to the main thread.
++
++// If the (growable) stack mapping already extends beyond the point
++// where we're going to put our guard pages, truncate the mapping at
++// that point by munmap()ping it.  This ensures that when we later
++// munmap() the guard pages we don't leave a hole in the stack
++// mapping. This only affects the main/initial thread
++
++bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
++
++  if (os::Linux::is_initial_thread()) {
++    // As we manually grow stack up to bottom inside create_attached_thread(),
++    // it's likely that os::Linux::initial_thread_stack_bottom is mapped and
++    // we don't need to do anything special.
++    // Check it first, before calling heavy function.
++    uintptr_t stack_extent = (uintptr_t) os::Linux::initial_thread_stack_bottom();
++    unsigned char vec[1];
++
++    if (mincore((address)stack_extent, os::vm_page_size(), vec) == -1) {
++      // Fallback to slow path on all errors, including EAGAIN
++      stack_extent = (uintptr_t) get_stack_commited_bottom(
++                                    os::Linux::initial_thread_stack_bottom(),
++                                    (size_t)addr - stack_extent);
++    }
++
++    if (stack_extent < (uintptr_t)addr) {
++      ::munmap((void*)stack_extent, (uintptr_t)(addr - stack_extent));
++    }
++  }
++
++  return os::commit_memory(addr, size, !ExecMem);
++}
++
++// If this is a growable mapping, remove the guard pages entirely by
++// munmap()ping them.  If not, just call uncommit_memory(). This only
++// affects the main/initial thread, but guard against future OS changes
++// It's safe to always unmap guard pages for initial thread because we
++// always place it right after end of the mapped region
++
++bool os::remove_stack_guard_pages(char* addr, size_t size) {
++  uintptr_t stack_extent, stack_base;
++
++  if (os::Linux::is_initial_thread()) {
++    return ::munmap(addr, size) == 0;
++  }
++
++  return os::uncommit_memory(addr, size);
++}
++
++static address _highest_vm_reserved_address = NULL;
++
++// If 'fixed' is true, anon_mmap() will attempt to reserve anonymous memory
++// at 'requested_addr'. If there are existing memory mappings at the same
++// location, however, they will be overwritten. If 'fixed' is false,
++// 'requested_addr' is only treated as a hint, the return value may or
++// may not start from the requested address. Unlike Linux mmap(), this
++// function returns NULL to indicate failure.
++static char* anon_mmap(char* requested_addr, size_t bytes, bool fixed) {
++  char * addr;
++  int flags;
++
++  flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANONYMOUS;
++  if (fixed) {
++    assert((uintptr_t)requested_addr % os::Linux::page_size() == 0, "unaligned address");
++    flags |= MAP_FIXED;
++  }
++
++  // Map uncommitted pages PROT_READ and PROT_WRITE, change access
++  // to PROT_EXEC if executable when we commit the page.
++  addr = (char*)::mmap(requested_addr, bytes, PROT_READ|PROT_WRITE,
++                       flags, -1, 0);
++
++  if (addr != MAP_FAILED) {
++    // anon_mmap() should only get called during VM initialization,
++    // don't need lock (actually we can skip locking even it can be called
++    // from multiple threads, because _highest_vm_reserved_address is just a
++    // hint about the upper limit of non-stack memory regions.)
++    if ((address)addr + bytes > _highest_vm_reserved_address) {
++      _highest_vm_reserved_address = (address)addr + bytes;
++    }
++  }
++
++  return addr == MAP_FAILED ? NULL : addr;
++}
++
++// Don't update _highest_vm_reserved_address, because there might be memory
++// regions above addr + size. If so, releasing a memory region only creates
++// a hole in the address space, it doesn't help prevent heap-stack collision.
++//
++static int anon_munmap(char * addr, size_t size) {
++  return ::munmap(addr, size) == 0;
++}
++
++char* os::pd_reserve_memory(size_t bytes, char* requested_addr,
++                         size_t alignment_hint) {
++  return anon_mmap(requested_addr, bytes, (requested_addr != NULL));
++}
++
++bool os::pd_release_memory(char* addr, size_t size) {
++  return anon_munmap(addr, size);
++}
++
++static address highest_vm_reserved_address() {
++  return _highest_vm_reserved_address;
++}
++
++static bool linux_mprotect(char* addr, size_t size, int prot) {
++  // Linux wants the mprotect address argument to be page aligned.
++  char* bottom = (char*)align_size_down((intptr_t)addr, os::Linux::page_size());
++
++  // According to SUSv3, mprotect() should only be used with mappings
++  // established by mmap(), and mmap() always maps whole pages. Unaligned
++  // 'addr' likely indicates problem in the VM (e.g. trying to change
++  // protection of malloc'ed or statically allocated memory). Check the
++  // caller if you hit this assert.
++  assert(addr == bottom, "sanity check");
++
++  size = align_size_up(pointer_delta(addr, bottom, 1) + size, os::Linux::page_size());
++  return ::mprotect(bottom, size, prot) == 0;
++}
++
++// Set protections specified
++bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
++                        bool is_committed) {
++  unsigned int p = 0;
++  switch (prot) {
++  case MEM_PROT_NONE: p = PROT_NONE; break;
++  case MEM_PROT_READ: p = PROT_READ; break;
++  case MEM_PROT_RW:   p = PROT_READ|PROT_WRITE; break;
++  case MEM_PROT_RWX:  p = PROT_READ|PROT_WRITE|PROT_EXEC; break;
++  default:
++    ShouldNotReachHere();
++  }
++  // is_committed is unused.
++  return linux_mprotect(addr, bytes, p);
++}
++
++bool os::guard_memory(char* addr, size_t size) {
++  return linux_mprotect(addr, size, PROT_NONE);
++}
++
++bool os::unguard_memory(char* addr, size_t size) {
++  return linux_mprotect(addr, size, PROT_READ|PROT_WRITE);
++}
++
++bool os::Linux::hugetlbfs_sanity_check(bool warn, size_t page_size) {
++  bool result = false;
++  void *p = mmap (NULL, page_size, PROT_READ|PROT_WRITE,
++                  MAP_ANONYMOUS|MAP_PRIVATE|MAP_HUGETLB,
++                  -1, 0);
++
++  if (p != MAP_FAILED) {
++    // We don't know if this really is a huge page or not.
++    FILE *fp = fopen("/proc/self/maps", "r");
++    if (fp) {
++      while (!feof(fp)) {
++        char chars[257];
++        long x = 0;
++        if (fgets(chars, sizeof(chars), fp)) {
++          if (sscanf(chars, "%lx-%*x", &x) == 1
++              && x == (long)p) {
++            if (strstr (chars, "hugepage")) {
++              result = true;
++              break;
++            }
++          }
++        }
++      }
++      fclose(fp);
++    }
++    munmap (p, page_size);
++    if (result)
++      return true;
++  }
++
++  if (warn) {
++    warning("HugeTLBFS is not supported by the operating system.");
++  }
++
++  return result;
++}
++
++/*
++* Set the coredump_filter bits to include largepages in core dump (bit 6)
++*
++* From the coredump_filter documentation:
++*
++* - (bit 0) anonymous private memory
++* - (bit 1) anonymous shared memory
++* - (bit 2) file-backed private memory
++* - (bit 3) file-backed shared memory
++* - (bit 4) ELF header pages in file-backed private memory areas (it is
++*           effective only if the bit 2 is cleared)
++* - (bit 5) hugetlb private memory
++* - (bit 6) hugetlb shared memory
++*/
++static void set_coredump_filter(void) {
++  FILE *f;
++  long cdm;
++
++  if ((f = fopen("/proc/self/coredump_filter", "r+")) == NULL) {
++    return;
++  }
++
++  if (fscanf(f, "%lx", &cdm) != 1) {
++    fclose(f);
++    return;
++  }
++
++  rewind(f);
++
++  if ((cdm & LARGEPAGES_BIT) == 0) {
++    cdm |= LARGEPAGES_BIT;
++    fprintf(f, "%#lx", cdm);
++  }
++
++  fclose(f);
++}
++
++// Large page support
++
++static size_t _large_page_size = 0;
++
++void os::large_page_init() {
++  if (!UseLargePages) {
++    UseHugeTLBFS = false;
++    UseSHM = false;
++    return;
++  }
++
++  if (FLAG_IS_DEFAULT(UseHugeTLBFS) && FLAG_IS_DEFAULT(UseSHM)) {
++    // If UseLargePages is specified on the command line try both methods,
++    // if it's default, then try only HugeTLBFS.
++    if (FLAG_IS_DEFAULT(UseLargePages)) {
++      UseHugeTLBFS = true;
++    } else {
++      UseHugeTLBFS = UseSHM = true;
++    }
++  }
++
++  if (LargePageSizeInBytes) {
++    _large_page_size = LargePageSizeInBytes;
++  } else {
++    // large_page_size on Linux is used to round up heap size. x86 uses either
++    // 2M or 4M page, depending on whether PAE (Physical Address Extensions)
++    // mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. IA64 can use
++    // page as large as 256M.
++    //
++    // Here we try to figure out page size by parsing /proc/meminfo and looking
++    // for a line with the following format:
++    //    Hugepagesize:     2048 kB
++    //
++    // If we can't determine the value (e.g. /proc is not mounted, or the text
++    // format has been changed), we'll use the largest page size supported by
++    // the processor.
++
++#ifndef ZERO
++    _large_page_size = IA32_ONLY(4 * M) AMD64_ONLY(2 * M) IA64_ONLY(256 * M) SPARC_ONLY(4 * M)
++                       ARM_ONLY(2 * M) PPC_ONLY(4 * M);
++#endif // ZERO
++
++    FILE *fp = fopen("/proc/meminfo", "r");
++    if (fp) {
++      while (!feof(fp)) {
++        int x = 0;
++        char buf[16];
++        if (fscanf(fp, "Hugepagesize: %d", &x) == 1) {
++          if (x && fgets(buf, sizeof(buf), fp) && strcmp(buf, " kB\n") == 0) {
++            _large_page_size = x * K;
++            break;
++          }
++        } else {
++          // skip to next line
++          for (;;) {
++            int ch = fgetc(fp);
++            if (ch == EOF || ch == (int)'\n') break;
++          }
++        }
++      }
++      fclose(fp);
++    }
++  }
++
++  // print a warning if any large page related flag is specified on command line
++  bool warn_on_failure = !FLAG_IS_DEFAULT(UseHugeTLBFS);
++
++  const size_t default_page_size = (size_t)Linux::page_size();
++  if (_large_page_size > default_page_size) {
++    _page_sizes[0] = _large_page_size;
++    _page_sizes[1] = default_page_size;
++    _page_sizes[2] = 0;
++  }
++  UseHugeTLBFS = UseHugeTLBFS &&
++                 Linux::hugetlbfs_sanity_check(warn_on_failure, _large_page_size);
++
++  if (UseHugeTLBFS)
++    UseSHM = false;
++
++  UseLargePages = UseHugeTLBFS || UseSHM;
++
++  set_coredump_filter();
++}
++
++#ifndef SHM_HUGETLB
++#define SHM_HUGETLB 04000
++#endif
++
++char* os::reserve_memory_special(size_t bytes, char* req_addr, bool exec) {
++  // "exec" is passed in but not used.  Creating the shared image for
++  // the code cache doesn't have an SHM_X executable permission to check.
++  assert(UseLargePages && UseSHM, "only for SHM large pages");
++
++  key_t key = IPC_PRIVATE;
++  char *addr;
++
++  bool warn_on_failure = UseLargePages &&
++                        (!FLAG_IS_DEFAULT(UseLargePages) ||
++                         !FLAG_IS_DEFAULT(LargePageSizeInBytes)
++                        );
++  char msg[128];
++
++  // Create a large shared memory region to attach to based on size.
++  // Currently, size is the total size of the heap
++  int shmid = shmget(key, bytes, SHM_HUGETLB|IPC_CREAT|SHM_R|SHM_W);
++  if (shmid == -1) {
++     // Possible reasons for shmget failure:
++     // 1. shmmax is too small for Java heap.
++     //    > check shmmax value: cat /proc/sys/kernel/shmmax
++     //    > increase shmmax value: echo "0xffffffff" > /proc/sys/kernel/shmmax
++     // 2. not enough large page memory.
++     //    > check available large pages: cat /proc/meminfo
++     //    > increase amount of large pages:
++     //          echo new_value > /proc/sys/vm/nr_hugepages
++     //      Note 1: different Linux may use different name for this property,
++     //            e.g. on Redhat AS-3 it is "hugetlb_pool".
++     //      Note 2: it's possible there's enough physical memory available but
++     //            they are so fragmented after a long run that they can't
++     //            coalesce into large pages. Try to reserve large pages when
++     //            the system is still "fresh".
++     if (warn_on_failure) {
++       jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno);
++       warning(msg);
++     }
++     return NULL;
++  }
++
++  // attach to the region
++  addr = (char*)shmat(shmid, req_addr, 0);
++  int err = errno;
++
++  // Remove shmid. If shmat() is successful, the actual shared memory segment
++  // will be deleted when it's detached by shmdt() or when the process
++  // terminates. If shmat() is not successful this will remove the shared
++  // segment immediately.
++  shmctl(shmid, IPC_RMID, NULL);
++
++  if ((intptr_t)addr == -1) {
++     if (warn_on_failure) {
++       jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err);
++       warning(msg);
++     }
++     return NULL;
++  }
++
++  if ((addr != NULL) && UseNUMAInterleaving) {
++    numa_make_global(addr, bytes);
++  }
++
++  // The memory is committed
++  MemTracker::record_virtual_memory_reserve_and_commit((address)addr, bytes, mtNone, CALLER_PC);
++
++  return addr;
++}
++
++bool os::release_memory_special(char* base, size_t bytes) {
++  MemTracker::Tracker tkr = MemTracker::get_virtual_memory_release_tracker();
++  // detaching the SHM segment will also delete it, see reserve_memory_special()
++  int rslt = shmdt(base);
++  if (rslt == 0) {
++    tkr.record((address)base, bytes);
++    return true;
++  } else {
++    tkr.discard();
++   return false;
++  }
++}
++
++size_t os::large_page_size() {
++  return _large_page_size;
++}
++
++// HugeTLBFS allows application to commit large page memory on demand;
++// with SysV SHM the entire memory region must be allocated as shared
++// memory.
++bool os::can_commit_large_page_memory() {
++  return UseHugeTLBFS;
++}
++
++bool os::can_execute_large_page_memory() {
++  return UseHugeTLBFS;
++}
++
++// Reserve memory at an arbitrary address, only if that area is
++// available (and not reserved for something else).
++
++char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
++  const int max_tries = 10;
++  char* base[max_tries];
++  size_t size[max_tries];
++  const size_t gap = 0x000000;
++
++  // Assert only that the size is a multiple of the page size, since
++  // that's all that mmap requires, and since that's all we really know
++  // about at this low abstraction level.  If we need higher alignment,
++  // we can either pass an alignment to this method or verify alignment
++  // in one of the methods further up the call chain.  See bug 5044738.
++  assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");
++
++  // Repeatedly allocate blocks until the block is allocated at the
++  // right spot. Give up after max_tries. Note that reserve_memory() will
++  // automatically update _highest_vm_reserved_address if the call is
++  // successful. The variable tracks the highest memory address every reserved
++  // by JVM. It is used to detect heap-stack collision if running with
++  // fixed-stack LinuxThreads. Because here we may attempt to reserve more
++  // space than needed, it could confuse the collision detecting code. To
++  // solve the problem, save current _highest_vm_reserved_address and
++  // calculate the correct value before return.
++  address old_highest = _highest_vm_reserved_address;
++
++  // Linux mmap allows caller to pass an address as hint; give it a try first,
++  // if kernel honors the hint then we can return immediately.
++  char * addr = anon_mmap(requested_addr, bytes, false);
++  if (addr == requested_addr) {
++     return requested_addr;
++  }
++
++  if (addr != NULL) {
++     // mmap() is successful but it fails to reserve at the requested address
++     anon_munmap(addr, bytes);
++  }
++
++  int i;
++  for (i = 0; i < max_tries; ++i) {
++    base[i] = reserve_memory(bytes);
++
++    if (base[i] != NULL) {
++      // Is this the block we wanted?
++      if (base[i] == requested_addr) {
++        size[i] = bytes;
++        break;
++      }
++
++      // Does this overlap the block we wanted? Give back the overlapped
++      // parts and try again.
++
++      size_t top_overlap = requested_addr + (bytes + gap) - base[i];
++      if (top_overlap >= 0 && top_overlap < bytes) {
++        unmap_memory(base[i], top_overlap);
++        base[i] += top_overlap;
++        size[i] = bytes - top_overlap;
++      } else {
++        size_t bottom_overlap = base[i] + bytes - requested_addr;
++        if (bottom_overlap >= 0 && bottom_overlap < bytes) {
++          unmap_memory(requested_addr, bottom_overlap);
++          size[i] = bytes - bottom_overlap;
++        } else {
++          size[i] = bytes;
++        }
++      }
++    }
++  }
++
++  // Give back the unused reserved pieces.
++
++  for (int j = 0; j < i; ++j) {
++    if (base[j] != NULL) {
++      unmap_memory(base[j], size[j]);
++    }
++  }
++
++  if (i < max_tries) {
++    _highest_vm_reserved_address = MAX2(old_highest, (address)requested_addr + bytes);
++    return requested_addr;
++  } else {
++    _highest_vm_reserved_address = old_highest;
++    return NULL;
++  }
++}
++
++size_t os::read(int fd, void *buf, unsigned int nBytes) {
++  return ::read(fd, buf, nBytes);
++}
++
++// TODO-FIXME: reconcile Solaris' os::sleep with the linux variation.
++// Solaris uses poll(), linux uses park().
++// Poll() is likely a better choice, assuming that Thread.interrupt()
++// generates a SIGUSRx signal. Note that SIGUSR1 can interfere with
++// SIGSEGV, see 4355769.
++
++int os::sleep(Thread* thread, jlong millis, bool interruptible) {
++  assert(thread == Thread::current(),  "thread consistency check");
++
++  ParkEvent * const slp = thread->_SleepEvent ;
++  slp->reset() ;
++  OrderAccess::fence() ;
++
++  if (interruptible) {
++    jlong prevtime = javaTimeNanos();
++
++    for (;;) {
++      if (os::is_interrupted(thread, true)) {
++        return OS_INTRPT;
++      }
++
++      jlong newtime = javaTimeNanos();
++
++      if (newtime - prevtime < 0) {
++        // time moving backwards, should only happen if no monotonic clock
++        // not a guarantee() because JVM should not abort on kernel/glibc bugs
++        assert(!Linux::supports_monotonic_clock(), "time moving backwards");
++      } else {
++        millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC;
++      }
++
++      if(millis <= 0) {
++        return OS_OK;
++      }
++
++      prevtime = newtime;
++
++      {
++        assert(thread->is_Java_thread(), "sanity check");
++        JavaThread *jt = (JavaThread *) thread;
++        ThreadBlockInVM tbivm(jt);
++        OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */);
++
++        jt->set_suspend_equivalent();
++        // cleared by handle_special_suspend_equivalent_condition() or
++        // java_suspend_self() via check_and_wait_while_suspended()
++
++        slp->park(millis);
++
++        // were we externally suspended while we were waiting?
++        jt->check_and_wait_while_suspended();
++      }
++    }
++  } else {
++    OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
++    jlong prevtime = javaTimeNanos();
++
++    for (;;) {
++      // It'd be nice to avoid the back-to-back javaTimeNanos() calls on
++      // the 1st iteration ...
++      jlong newtime = javaTimeNanos();
++
++      if (newtime - prevtime < 0) {
++        // time moving backwards, should only happen if no monotonic clock
++        // not a guarantee() because JVM should not abort on kernel/glibc bugs
++        assert(!Linux::supports_monotonic_clock(), "time moving backwards");
++      } else {
++        millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC;
++      }
++
++      if(millis <= 0) break ;
++
++      prevtime = newtime;
++      slp->park(millis);
++    }
++    return OS_OK ;
++  }
++}
++
++int os::naked_sleep() {
++  // %% make the sleep time an integer flag. for now use 1 millisec.
++  return os::sleep(Thread::current(), 1, false);
++}
++
++// Sleep forever; naked call to OS-specific sleep; use with CAUTION
++void os::infinite_sleep() {
++  while (true) {    // sleep forever ...
++    ::sleep(100);   // ... 100 seconds at a time
++  }
++}
++
++// Used to convert frequent JVM_Yield() to nops
++bool os::dont_yield() {
++  return DontYieldALot;
++}
++
++void os::yield() {
++  sched_yield();
++}
++
++os::YieldResult os::NakedYield() { sched_yield(); return os::YIELD_UNKNOWN ;}
++
++void os::yield_all(int attempts) {
++  // Yields to all threads, including threads with lower priorities
++  // Threads on Linux are all with same priority. The Solaris style
++  // os::yield_all() with nanosleep(1ms) is not necessary.
++  sched_yield();
++}
++
++// Called from the tight loops to possibly influence time-sharing heuristics
++void os::loop_breaker(int attempts) {
++  os::yield_all(attempts);
++}
++
++////////////////////////////////////////////////////////////////////////////////
++// thread priority support
++
++// Note: Normal Linux applications are run with SCHED_OTHER policy. SCHED_OTHER
++// only supports dynamic priority, static priority must be zero. For real-time
++// applications, Linux supports SCHED_RR which allows static priority (1-99).
++// However, for large multi-threaded applications, SCHED_RR is not only slower
++// than SCHED_OTHER, but also very unstable (my volano tests hang hard 4 out
++// of 5 runs - Sep 2005).
++//
++// The following code actually changes the niceness of kernel-thread/LWP. It
++// has an assumption that setpriority() only modifies one kernel-thread/LWP,
++// not the entire user process, and user level threads are 1:1 mapped to kernel
++// threads. It has always been the case, but could change in the future. For
++// this reason, the code should not be used as default (ThreadPriorityPolicy=0).
++// It is only used when ThreadPriorityPolicy=1 and requires root privilege.
++
++int os::java_to_os_priority[CriticalPriority + 1] = {
++  19,              // 0 Entry should never be used
++
++   4,              // 1 MinPriority
++   3,              // 2
++   2,              // 3
++
++   1,              // 4
++   0,              // 5 NormPriority
++  -1,              // 6
++
++  -2,              // 7
++  -3,              // 8
++  -4,              // 9 NearMaxPriority
++
++  -5,              // 10 MaxPriority
++
++  -5               // 11 CriticalPriority
++};
++
++static int prio_init() {
++  if (ThreadPriorityPolicy == 1) {
++    // Only root can raise thread priority. Don't allow ThreadPriorityPolicy=1
++    // if effective uid is not root. Perhaps, a more elegant way of doing
++    // this is to test CAP_SYS_NICE capability, but that will require libcap.so
++    if (geteuid() != 0) {
++      if (!FLAG_IS_DEFAULT(ThreadPriorityPolicy)) {
++        warning("-XX:ThreadPriorityPolicy requires root privilege on Linux");
++      }
++      ThreadPriorityPolicy = 0;
++    }
++  }
++  if (UseCriticalJavaThreadPriority) {
++    os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority];
++  }
++  return 0;
++}
++
++OSReturn os::set_native_priority(Thread* thread, int newpri) {
++  if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) return OS_OK;
++
++  int ret = setpriority(PRIO_PROCESS, thread->osthread()->thread_id(), newpri);
++  return (ret == 0) ? OS_OK : OS_ERR;
++}
++
++OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) {
++  if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) {
++    *priority_ptr = java_to_os_priority[NormPriority];
++    return OS_OK;
++  }
++
++  errno = 0;
++  *priority_ptr = getpriority(PRIO_PROCESS, thread->osthread()->thread_id());
++  return (*priority_ptr != -1 || errno == 0 ? OS_OK : OS_ERR);
++}
++
++// Hint to the underlying OS that a task switch would not be good.
++// Void return because it's a hint and can fail.
++void os::hint_no_preempt() {}
++
++////////////////////////////////////////////////////////////////////////////////
++// suspend/resume support
++
++//  the low-level signal-based suspend/resume support is a remnant from the
++//  old VM-suspension that used to be for java-suspension, safepoints etc,
++//  within hotspot. Now there is a single use-case for this:
++//    - calling get_thread_pc() on the VMThread by the flat-profiler task
++//      that runs in the watcher thread.
++//  The remaining code is greatly simplified from the more general suspension
++//  code that used to be used.
++//
++//  The protocol is quite simple:
++//  - suspend:
++//      - sends a signal to the target thread
++//      - polls the suspend state of the osthread using a yield loop
++//      - target thread signal handler (SR_handler) sets suspend state
++//        and blocks in sigsuspend until continued
++//  - resume:
++//      - sets target osthread state to continue
++//      - sends signal to end the sigsuspend loop in the SR_handler
++//
++//  Note that the SR_lock plays no role in this suspend/resume protocol.
++//
++
++static void resume_clear_context(OSThread *osthread) {
++  osthread->set_ucontext(NULL);
++  osthread->set_siginfo(NULL);
++}
++
++static void suspend_save_context(OSThread *osthread, siginfo_t* siginfo, ucontext_t* context) {
++  osthread->set_ucontext(context);
++  osthread->set_siginfo(siginfo);
++}
++
++//
++// Handler function invoked when a thread's execution is suspended or
++// resumed. We have to be careful that only async-safe functions are
++// called here (Note: most pthread functions are not async safe and
++// should be avoided.)
++//
++// Note: sigwait() is a more natural fit than sigsuspend() from an
++// interface point of view, but sigwait() prevents the signal hander
++// from being run. libpthread would get very confused by not having
++// its signal handlers run and prevents sigwait()'s use with the
++// mutex granting granting signal.
++//
++// Currently only ever called on the VMThread and JavaThreads (PC sampling)
++//
++static void SR_handler(int sig, siginfo_t* siginfo, ucontext_t* context) {
++  // Save and restore errno to avoid confusing native code with EINTR
++  // after sigsuspend.
++  int old_errno = errno;
++
++  Thread* thread = Thread::current();
++  OSThread* osthread = thread->osthread();
++  assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread");
++
++  os::SuspendResume::State current = osthread->sr.state();
++  if (current == os::SuspendResume::SR_SUSPEND_REQUEST) {
++    suspend_save_context(osthread, siginfo, context);
++
++    // attempt to switch the state, we assume we had a SUSPEND_REQUEST
++    os::SuspendResume::State state = osthread->sr.suspended();
++    if (state == os::SuspendResume::SR_SUSPENDED) {
++      sigset_t suspend_set;  // signals for sigsuspend()
++
++      // get current set of blocked signals and unblock resume signal
++      pthread_sigmask(SIG_BLOCK, NULL, &suspend_set);
++      sigdelset(&suspend_set, SR_signum);
++
++      sr_semaphore.signal();
++      // wait here until we are resumed
++      while (1) {
++        sigsuspend(&suspend_set);
++
++        os::SuspendResume::State result = osthread->sr.running();
++        if (result == os::SuspendResume::SR_RUNNING) {
++          sr_semaphore.signal();
++          break;
++        }
++      }
++
++    } else if (state == os::SuspendResume::SR_RUNNING) {
++      // request was cancelled, continue
++    } else {
++      ShouldNotReachHere();
++    }
++
++    resume_clear_context(osthread);
++  } else if (current == os::SuspendResume::SR_RUNNING) {
++    // request was cancelled, continue
++  } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) {
++    // ignore
++  } else {
++    // ignore
++  }
++
++  errno = old_errno;
++}
++
++
++static int SR_initialize() {
++  struct sigaction act;
++  char *s;
++  /* Get signal number to use for suspend/resume */
++  if ((s = ::getenv("_JAVA_SR_SIGNUM")) != 0) {
++    int sig = ::strtol(s, 0, 10);
++    if (sig > 0 || sig < _NSIG) {
++        SR_signum = sig;
++    }
++  }
++
++  assert(SR_signum > SIGSEGV && SR_signum > SIGBUS,
++        "SR_signum must be greater than max(SIGSEGV, SIGBUS), see 4355769");
++
++  sigemptyset(&SR_sigset);
++  sigaddset(&SR_sigset, SR_signum);
++
++  /* Set up signal handler for suspend/resume */
++  act.sa_flags = SA_RESTART|SA_SIGINFO;
++  act.sa_handler = (void (*)(int)) SR_handler;
++
++  // SR_signum is blocked by default.
++  // 4528190 - We also need to block pthread restart signal (32 on all
++  // supported Linux platforms). Note that LinuxThreads need to block
++  // this signal for all threads to work properly. So we don't have
++  // to use hard-coded signal number when setting up the mask.
++  pthread_sigmask(SIG_BLOCK, NULL, &act.sa_mask);
++
++  if (sigaction(SR_signum, &act, 0) == -1) {
++    return -1;
++  }
++
++  // Save signal flag
++  os::Linux::set_our_sigflags(SR_signum, act.sa_flags);
++  return 0;
++}
++
++static int SR_finalize() {
++  return 0;
++}
++
++static int sr_notify(OSThread* osthread) {
++  int status = pthread_kill(osthread->pthread_id(), SR_signum);
++  assert_status(status == 0, status, "pthread_kill");
++  return status;
++}
++
++// "Randomly" selected value for how long we want to spin
++// before bailing out on suspending a thread, also how often
++// we send a signal to a thread we want to resume
++static const int RANDOMLY_LARGE_INTEGER = 1000000;
++static const int RANDOMLY_LARGE_INTEGER2 = 100;
++
++// returns true on success and false on error - really an error is fatal
++// but this seems the normal response to library errors
++static bool do_suspend(OSThread* osthread) {
++  assert(osthread->sr.is_running(), "thread should be running");
++  assert(!sr_semaphore.trywait(), "semaphore has invalid state");
++
++  // mark as suspended and send signal
++  if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) {
++    // failed to switch, state wasn't running?
++    ShouldNotReachHere();
++    return false;
++  }
++
++  if (sr_notify(osthread) != 0) {
++    ShouldNotReachHere();
++  }
++
++  // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED
++  while (true) {
++    if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) {
++      break;
++    } else {
++      // timeout
++      os::SuspendResume::State cancelled = osthread->sr.cancel_suspend();
++      if (cancelled == os::SuspendResume::SR_RUNNING) {
++        return false;
++      } else if (cancelled == os::SuspendResume::SR_SUSPENDED) {
++        // make sure that we consume the signal on the semaphore as well
++        sr_semaphore.wait();
++        break;
++      } else {
++        ShouldNotReachHere();
++        return false;
++      }
++    }
++  }
++
++  guarantee(osthread->sr.is_suspended(), "Must be suspended");
++  return true;
++}
++
++static void do_resume(OSThread* osthread) {
++  assert(osthread->sr.is_suspended(), "thread should be suspended");
++  assert(!sr_semaphore.trywait(), "invalid semaphore state");
++
++  if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) {
++    // failed to switch to WAKEUP_REQUEST
++    ShouldNotReachHere();
++    return;
++  }
++
++  while (true) {
++    if (sr_notify(osthread) == 0) {
++      if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) {
++        if (osthread->sr.is_running()) {
++          return;
++        }
++      }
++    } else {
++      ShouldNotReachHere();
++    }
++  }
++
++  guarantee(osthread->sr.is_running(), "Must be running!");
++}
++
++////////////////////////////////////////////////////////////////////////////////
++// interrupt support
++
++void os::interrupt(Thread* thread) {
++  assert(Thread::current() == thread || Threads_lock->owned_by_self(),
++    "possibility of dangling Thread pointer");
++
++  OSThread* osthread = thread->osthread();
++
++  if (!osthread->interrupted()) {
++    osthread->set_interrupted(true);
++    // More than one thread can get here with the same value of osthread,
++    // resulting in multiple notifications.  We do, however, want the store
++    // to interrupted() to be visible to other threads before we execute unpark().
++    OrderAccess::fence();
++    ParkEvent * const slp = thread->_SleepEvent ;
++    if (slp != NULL) slp->unpark() ;
++  }
++
++  // For JSR166. Unpark even if interrupt status already was set
++  if (thread->is_Java_thread())
++    ((JavaThread*)thread)->parker()->unpark();
++
++  ParkEvent * ev = thread->_ParkEvent ;
++  if (ev != NULL) ev->unpark() ;
++
++}
++
++bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
++  assert(Thread::current() == thread || Threads_lock->owned_by_self(),
++    "possibility of dangling Thread pointer");
++
++  OSThread* osthread = thread->osthread();
++
++  bool interrupted = osthread->interrupted();
++
++  if (interrupted && clear_interrupted) {
++    osthread->set_interrupted(false);
++    // consider thread->_SleepEvent->reset() ... optional optimization
++  }
++
++  return interrupted;
++}
++
++///////////////////////////////////////////////////////////////////////////////////
++// signal handling (except suspend/resume)
++
++// This routine may be used by user applications as a "hook" to catch signals.
++// The user-defined signal handler must pass unrecognized signals to this
++// routine, and if it returns true (non-zero), then the signal handler must
++// return immediately.  If the flag "abort_if_unrecognized" is true, then this
++// routine will never retun false (zero), but instead will execute a VM panic
++// routine kill the process.
++//
++// If this routine returns false, it is OK to call it again.  This allows
++// the user-defined signal handler to perform checks either before or after
++// the VM performs its own checks.  Naturally, the user code would be making
++// a serious error if it tried to handle an exception (such as a null check
++// or breakpoint) that the VM was generating for its own correct operation.
++//
++// This routine may recognize any of the following kinds of signals:
++//    SIGBUS, SIGSEGV, SIGILL, SIGFPE, SIGQUIT, SIGPIPE, SIGXFSZ, SIGUSR1.
++// It should be consulted by handlers for any of those signals.
++//
++// The caller of this routine must pass in the three arguments supplied
++// to the function referred to in the "sa_sigaction" (not the "sa_handler")
++// field of the structure passed to sigaction().  This routine assumes that
++// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART.
++//
++// Note that the VM will print warnings if it detects conflicting signal
++// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers".
++//
++extern "C" JNIEXPORT int
++JVM_handle_linux_signal(int signo, siginfo_t* siginfo,
++                        void* ucontext, int abort_if_unrecognized);
++
++void signalHandler(int sig, siginfo_t* info, void* uc) {
++  assert(info != NULL && uc != NULL, "it must be old kernel");
++  JVM_handle_linux_signal(sig, info, uc, true);
++}
++
++
++// This boolean allows users to forward their own non-matching signals
++// to JVM_handle_linux_signal, harmlessly.
++bool os::Linux::signal_handlers_are_installed = false;
++
++// For signal-chaining
++struct sigaction os::Linux::sigact[MAXSIGNUM];
++unsigned int os::Linux::sigs = 0;
++bool os::Linux::libjsig_is_loaded = false;
++typedef struct sigaction *(*get_signal_t)(int);
++get_signal_t os::Linux::get_signal_action = NULL;
++
++struct sigaction* os::Linux::get_chained_signal_action(int sig) {
++  struct sigaction *actp = NULL;
++
++  if (libjsig_is_loaded) {
++    // Retrieve the old signal handler from libjsig
++    actp = (*get_signal_action)(sig);
++  }
++  if (actp == NULL) {
++    // Retrieve the preinstalled signal handler from jvm
++    actp = get_preinstalled_handler(sig);
++  }
++
++  return actp;
++}
++
++static bool call_chained_handler(struct sigaction *actp, int sig,
++                                 siginfo_t *siginfo, void *context) {
++  // Call the old signal handler
++  if (actp->sa_handler == SIG_DFL) {
++    // It's more reasonable to let jvm treat it as an unexpected exception
++    // instead of taking the default action.
++    return false;
++  } else if (actp->sa_handler != SIG_IGN) {
++    if ((actp->sa_flags & SA_NODEFER) == 0) {
++      // automaticlly block the signal
++      sigaddset(&(actp->sa_mask), sig);
++    }
++
++    sa_handler_t hand;
++    sa_sigaction_t sa;
++    bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0;
++    // retrieve the chained handler
++    if (siginfo_flag_set) {
++      sa = actp->sa_sigaction;
++    } else {
++      hand = actp->sa_handler;
++    }
++
++    if ((actp->sa_flags & SA_RESETHAND) != 0) {
++      actp->sa_handler = SIG_DFL;
++    }
++
++    // try to honor the signal mask
++    sigset_t oset;
++    pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset);
++
++    // call into the chained handler
++    if (siginfo_flag_set) {
++      (*sa)(sig, siginfo, context);
++    } else {
++      (*hand)(sig);
++    }
++
++    // restore the signal mask
++    pthread_sigmask(SIG_SETMASK, &oset, 0);
++  }
++  // Tell jvm's signal handler the signal is taken care of.
++  return true;
++}
++
++bool os::Linux::chained_handler(int sig, siginfo_t* siginfo, void* context) {
++  bool chained = false;
++  // signal-chaining
++  if (UseSignalChaining) {
++    struct sigaction *actp = get_chained_signal_action(sig);
++    if (actp != NULL) {
++      chained = call_chained_handler(actp, sig, siginfo, context);
++    }
++  }
++  return chained;
++}
++
++struct sigaction* os::Linux::get_preinstalled_handler(int sig) {
++  if ((( (unsigned int)1 << sig ) & sigs) != 0) {
++    return &sigact[sig];
++  }
++  return NULL;
++}
++
++void os::Linux::save_preinstalled_handler(int sig, struct sigaction& oldAct) {
++  assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range");
++  sigact[sig] = oldAct;
++  sigs |= (unsigned int)1 << sig;
++}
++
++// for diagnostic
++int os::Linux::sigflags[MAXSIGNUM];
++
++int os::Linux::get_our_sigflags(int sig) {
++  assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range");
++  return sigflags[sig];
++}
++
++void os::Linux::set_our_sigflags(int sig, int flags) {
++  assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range");
++  sigflags[sig] = flags;
++}
++
++void os::Linux::set_signal_handler(int sig, bool set_installed) {
++  // Check for overwrite.
++  struct sigaction oldAct;
++  sigaction(sig, (struct sigaction*)NULL, &oldAct);
++
++  void* oldhand = oldAct.sa_sigaction
++                ? CAST_FROM_FN_PTR(void*,  oldAct.sa_sigaction)
++                : CAST_FROM_FN_PTR(void*,  oldAct.sa_handler);
++  if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) &&
++      oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) &&
++      oldhand != CAST_FROM_FN_PTR(void*, (sa_sigaction_t)signalHandler)) {
++    if (AllowUserSignalHandlers || !set_installed) {
++      // Do not overwrite; user takes responsibility to forward to us.
++      return;
++    } else if (UseSignalChaining) {
++      // save the old handler in jvm
++      save_preinstalled_handler(sig, oldAct);
++      // libjsig also interposes the sigaction() call below and saves the
++      // old sigaction on it own.
++    } else {
++      fatal(err_msg("Encountered unexpected pre-existing sigaction handler "
++                    "%#lx for signal %d.", (long)oldhand, sig));
++    }
++  }
++
++  struct sigaction sigAct;
++  sigfillset(&(sigAct.sa_mask));
++  sigAct.sa_handler = SIG_DFL;
++  if (!set_installed) {
++    sigAct.sa_flags = SA_SIGINFO|SA_RESTART;
++  } else {
++    sigAct.sa_sigaction = signalHandler;
++    sigAct.sa_flags = SA_SIGINFO|SA_RESTART;
++  }
++  // Save flags, which are set by ours
++  assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range");
++  sigflags[sig] = sigAct.sa_flags;
++
++  int ret = sigaction(sig, &sigAct, &oldAct);
++  assert(ret == 0, "check");
++
++  void* oldhand2  = oldAct.sa_sigaction
++                  ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction)
++                  : CAST_FROM_FN_PTR(void*, oldAct.sa_handler);
++  assert(oldhand2 == oldhand, "no concurrent signal handler installation");
++}
++
++// install signal handlers for signals that HotSpot needs to
++// handle in order to support Java-level exception handling.
++
++void os::Linux::install_signal_handlers() {
++  if (!signal_handlers_are_installed) {
++    signal_handlers_are_installed = true;
++
++    // signal-chaining
++    typedef void (*signal_setting_t)();
++    signal_setting_t begin_signal_setting = NULL;
++    signal_setting_t end_signal_setting = NULL;
++    begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
++                             dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting"));
++    if (begin_signal_setting != NULL) {
++      end_signal_setting = CAST_TO_FN_PTR(signal_setting_t,
++                             dlsym(RTLD_DEFAULT, "JVM_end_signal_setting"));
++      get_signal_action = CAST_TO_FN_PTR(get_signal_t,
++                            dlsym(RTLD_DEFAULT, "JVM_get_signal_action"));
++      libjsig_is_loaded = true;
++      assert(UseSignalChaining, "should enable signal-chaining");
++    }
++    if (libjsig_is_loaded) {
++      // Tell libjsig jvm is setting signal handlers
++      (*begin_signal_setting)();
++    }
++
++    set_signal_handler(SIGSEGV, true);
++    set_signal_handler(SIGPIPE, true);
++    set_signal_handler(SIGBUS, true);
++    set_signal_handler(SIGILL, true);
++    set_signal_handler(SIGFPE, true);
++    set_signal_handler(SIGXFSZ, true);
++
++    if (libjsig_is_loaded) {
++      // Tell libjsig jvm finishes setting signal handlers
++      (*end_signal_setting)();
++    }
++
++    // We don't activate signal checker if libjsig is in place, we trust ourselves
++    // and if UserSignalHandler is installed all bets are off.
++    // Log that signal checking is off only if -verbose:jni is specified.
++    if (CheckJNICalls) {
++      if (libjsig_is_loaded) {
++        if (PrintJNIResolving) {
++          tty->print_cr("Info: libjsig is activated, all active signal checking is disabled");
++        }
++        check_signals = false;
++      }
++      if (AllowUserSignalHandlers) {
++        if (PrintJNIResolving) {
++          tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled");
++        }
++        check_signals = false;
++      }
++    }
++  }
++}
++
++// This is the fastest way to get thread cpu time on Linux.
++// Returns cpu time (user+sys) for any thread, not only for current.
++// POSIX compliant clocks are implemented in the kernels 2.6.16+.
++// It might work on 2.6.10+ with a special kernel/glibc patch.
++// For reference, please, see IEEE Std 1003.1-2004:
++//   http://www.unix.org/single_unix_specification
++
++jlong os::Linux::fast_thread_cpu_time(clockid_t clockid) {
++  struct timespec tp;
++  int rc = os::Linux::clock_gettime(clockid, &tp);
++  assert(rc == 0, "clock_gettime is expected to return 0 code");
++
++  return (tp.tv_sec * NANOSECS_PER_SEC) + tp.tv_nsec;
++}
++
++/////
++// glibc on Linux platform uses non-documented flag
++// to indicate, that some special sort of signal
++// trampoline is used.
++// We will never set this flag, and we should
++// ignore this flag in our diagnostic
++#ifdef SIGNIFICANT_SIGNAL_MASK
++#undef SIGNIFICANT_SIGNAL_MASK
++#endif
++#define SIGNIFICANT_SIGNAL_MASK (~0x04000000)
++
++static const char* get_signal_handler_name(address handler,
++                                           char* buf, int buflen) {
++  int offset;
++  bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset);
++  if (found) {
++    // skip directory names
++    const char *p1, *p2;
++    p1 = buf;
++    size_t len = strlen(os::file_separator());
++    while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
++    jio_snprintf(buf, buflen, "%s+0x%x", p1, offset);
++  } else {
++    jio_snprintf(buf, buflen, PTR_FORMAT, handler);
++  }
++  return buf;
++}
++
++static void print_signal_handler(outputStream* st, int sig,
++                                 char* buf, size_t buflen) {
++  struct sigaction sa;
++
++  sigaction(sig, NULL, &sa);
++
++  // See comment for SIGNIFICANT_SIGNAL_MASK define
++  sa.sa_flags &= SIGNIFICANT_SIGNAL_MASK;
++
++  st->print("%s: ", os::exception_name(sig, buf, buflen));
++
++  address handler = (sa.sa_flags & SA_SIGINFO)
++    ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
++    : CAST_FROM_FN_PTR(address, sa.sa_handler);
++
++  if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) {
++    st->print("SIG_DFL");
++  } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) {
++    st->print("SIG_IGN");
++  } else {
++    st->print("[%s]", get_signal_handler_name(handler, buf, buflen));
++  }
++
++  st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask);
++
++  address rh = VMError::get_resetted_sighandler(sig);
++  // May be, handler was resetted by VMError?
++  if(rh != NULL) {
++    handler = rh;
++    sa.sa_flags = VMError::get_resetted_sigflags(sig) & SIGNIFICANT_SIGNAL_MASK;
++  }
++
++  st->print(", sa_flags="   PTR32_FORMAT, sa.sa_flags);
++
++  // Check: is it our handler?
++  if(handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler) ||
++     handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler)) {
++    // It is our signal handler
++    // check for flags, reset system-used one!
++    if((int)sa.sa_flags != os::Linux::get_our_sigflags(sig)) {
++      st->print(
++                ", flags was changed from " PTR32_FORMAT ", consider using jsig library",
++                os::Linux::get_our_sigflags(sig));
++    }
++  }
++  st->cr();
++}
++
++
++#define DO_SIGNAL_CHECK(sig) \
++  if (!sigismember(&check_signal_done, sig)) \
++    os::Linux::check_signal_handler(sig)
++
++// This method is a periodic task to check for misbehaving JNI applications
++// under CheckJNI, we can add any periodic checks here
++
++void os::run_periodic_checks() {
++
++  if (check_signals == false) return;
++
++  // SEGV and BUS if overridden could potentially prevent
++  // generation of hs*.log in the event of a crash, debugging
++  // such a case can be very challenging, so we absolutely
++  // check the following for a good measure:
++  DO_SIGNAL_CHECK(SIGSEGV);
++  DO_SIGNAL_CHECK(SIGILL);
++  DO_SIGNAL_CHECK(SIGFPE);
++  DO_SIGNAL_CHECK(SIGBUS);
++  DO_SIGNAL_CHECK(SIGPIPE);
++  DO_SIGNAL_CHECK(SIGXFSZ);
++
++
++  // ReduceSignalUsage allows the user to override these handlers
++  // see comments at the very top and jvm_solaris.h
++  if (!ReduceSignalUsage) {
++    DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL);
++    DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL);
++    DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL);
++    DO_SIGNAL_CHECK(BREAK_SIGNAL);
++  }
++
++  DO_SIGNAL_CHECK(SR_signum);
++  DO_SIGNAL_CHECK(INTERRUPT_SIGNAL);
++}
++
++typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *);
++
++static os_sigaction_t os_sigaction = NULL;
++
++void os::Linux::check_signal_handler(int sig) {
++  char buf[O_BUFLEN];
++  address jvmHandler = NULL;
++
++
++  struct sigaction act;
++  if (os_sigaction == NULL) {
++    // only trust the default sigaction, in case it has been interposed
++    os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction");
++    if (os_sigaction == NULL) return;
++  }
++
++  os_sigaction(sig, (struct sigaction*)NULL, &act);
++
++
++  act.sa_flags &= SIGNIFICANT_SIGNAL_MASK;
++
++  address thisHandler = (act.sa_flags & SA_SIGINFO)
++    ? CAST_FROM_FN_PTR(address, act.sa_sigaction)
++    : CAST_FROM_FN_PTR(address, act.sa_handler) ;
++
++
++  switch(sig) {
++  case SIGSEGV:
++  case SIGBUS:
++  case SIGFPE:
++  case SIGPIPE:
++  case SIGILL:
++  case SIGXFSZ:
++    jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler);
++    break;
++
++  case SHUTDOWN1_SIGNAL:
++  case SHUTDOWN2_SIGNAL:
++  case SHUTDOWN3_SIGNAL:
++  case BREAK_SIGNAL:
++    jvmHandler = (address)user_handler();
++    break;
++
++  case INTERRUPT_SIGNAL:
++    jvmHandler = CAST_FROM_FN_PTR(address, SIG_DFL);
++    break;
++
++  default:
++    if (sig == SR_signum) {
++      jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler);
++    } else {
++      return;
++    }
++    break;
++  }
++
++  if (thisHandler != jvmHandler) {
++    tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN));
++    tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN));
++    tty->print_cr("  found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN));
++    // No need to check this sig any longer
++    sigaddset(&check_signal_done, sig);
++  } else if(os::Linux::get_our_sigflags(sig) != 0 && (int)act.sa_flags != os::Linux::get_our_sigflags(sig)) {
++    tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN));
++    tty->print("expected:" PTR32_FORMAT, os::Linux::get_our_sigflags(sig));
++    tty->print_cr("  found:" PTR32_FORMAT, act.sa_flags);
++    // No need to check this sig any longer
++    sigaddset(&check_signal_done, sig);
++  }
++
++  // Dump all the signal
++  if (sigismember(&check_signal_done, sig)) {
++    print_signal_handlers(tty, buf, O_BUFLEN);
++  }
++}
++
++extern void report_error(char* file_name, int line_no, char* title, char* format, ...);
++
++extern bool signal_name(int signo, char* buf, size_t len);
++
++const char* os::exception_name(int exception_code, char* buf, size_t size) {
++  if (0 < exception_code && exception_code <= SIGRTMAX) {
++    // signal
++    if (!signal_name(exception_code, buf, size)) {
++      jio_snprintf(buf, size, "SIG%d", exception_code);
++    }
++    return buf;
++  } else {
++    return NULL;
++  }
++}
++
++// this is called _before_ the most of global arguments have been parsed
++void os::init(void) {
++  char dummy;   /* used to get a guess on initial stack address */
++//  first_hrtime = gethrtime();
++
++  // With LinuxThreads the JavaMain thread pid (primordial thread)
++  // is different than the pid of the java launcher thread.
++  // So, on Linux, the launcher thread pid is passed to the VM
++  // via the sun.java.launcher.pid property.
++  // Use this property instead of getpid() if it was correctly passed.
++  // See bug 6351349.
++  pid_t java_launcher_pid = (pid_t) Arguments::sun_java_launcher_pid();
++
++  _initial_pid = (java_launcher_pid > 0) ? java_launcher_pid : getpid();
++
++  clock_tics_per_sec = sysconf(_SC_CLK_TCK);
++
++  init_random(1234567);
++
++  ThreadCritical::initialize();
++
++  Linux::set_page_size(sysconf(_SC_PAGESIZE));
++  if (Linux::page_size() == -1) {
++    fatal(err_msg("os_linux.cpp: os::init: sysconf failed (%s)",
++                  strerror(errno)));
++  }
++  init_page_sizes((size_t) Linux::page_size());
++
++  Linux::initialize_system_info();
++
++  // main_thread points to the aboriginal thread
++  Linux::_main_thread = pthread_self();
++
++  Linux::clock_init();
++  initial_time_count = os::elapsed_counter();
++  pthread_mutex_init(&dl_mutex, NULL);
++
++  // If the pagesize of the VM is greater than 8K determine the appropriate
++  // number of initial guard pages.  The user can change this with the
++  // command line arguments, if needed.
++  if (vm_page_size() > (int)Linux::vm_default_page_size()) {
++    StackYellowPages = 1;
++    StackRedPages = 1;
++    StackShadowPages = round_to((StackShadowPages*Linux::vm_default_page_size()), vm_page_size()) / vm_page_size();
++  }
++}
++
++// To install functions for atexit system call
++extern "C" {
++  static void perfMemory_exit_helper() {
++    perfMemory_exit();
++  }
++}
++
++// this is called _after_ the global arguments have been parsed
++jint os::init_2(void)
++{
++  Linux::fast_thread_clock_init();
++
++  // Allocate a single page and mark it as readable for safepoint polling
++  address polling_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
++  guarantee( polling_page != MAP_FAILED, "os::init_2: failed to allocate polling page" );
++
++  os::set_polling_page( polling_page );
++
++#ifndef PRODUCT
++  if(Verbose && PrintMiscellaneous)
++    tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
++#endif
++
++  if (!UseMembar) {
++    address mem_serialize_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
++    guarantee( mem_serialize_page != MAP_FAILED, "mmap Failed for memory serialize page");
++    os::set_memory_serialize_page( mem_serialize_page );
++
++#ifndef PRODUCT
++    if(Verbose && PrintMiscellaneous)
++      tty->print("[Memory Serialize  Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
++#endif
++  }
++
++  os::large_page_init();
++
++  // initialize suspend/resume support - must do this before signal_sets_init()
++  if (SR_initialize() != 0) {
++    perror("SR_initialize failed");
++    return JNI_ERR;
++  }
++
++  Linux::signal_sets_init();
++  Linux::install_signal_handlers();
++
++  // Check minimum allowable stack size for thread creation and to initialize
++  // the java system classes, including StackOverflowError - depends on page
++  // size.  Add a page for compiler2 recursion in main thread.
++  // Add in 2*BytesPerWord times page size to account for VM stack during
++  // class initialization depending on 32 or 64 bit VM.
++  os::Linux::min_stack_allowed = MAX2(os::Linux::min_stack_allowed,
++            (size_t)(StackYellowPages+StackRedPages+StackShadowPages) * Linux::page_size() +
++                    (2*BytesPerWord COMPILER2_PRESENT(+1)) * Linux::vm_default_page_size());
++
++  size_t threadStackSizeInBytes = ThreadStackSize * K;
++  if (threadStackSizeInBytes != 0 &&
++      threadStackSizeInBytes < os::Linux::min_stack_allowed) {
++        tty->print_cr("\nThe stack size specified is too small, "
++                      "Specify at least %dk",
++                      os::Linux::min_stack_allowed/ K);
++        return JNI_ERR;
++  }
++
++  // Make the stack size a multiple of the page size so that
++  // the yellow/red zones can be guarded.
++  JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes,
++        vm_page_size()));
++
++  Linux::capture_initial_stack(JavaThread::stack_size_at_create());
++
++  Linux::libpthread_init();
++  if (PrintMiscellaneous && (Verbose || WizardMode)) {
++     tty->print_cr("[HotSpot is running with %s, %s(%s)]\n",
++          Linux::glibc_version(), Linux::libpthread_version(),
++          Linux::is_floating_stack() ? "floating stack" : "fixed stack");
++  }
++
++  if (UseNUMA) {
++    if (!Linux::libnuma_init()) {
++      UseNUMA = false;
++    } else {
++      if ((Linux::numa_max_node() < 1)) {
++        // There's only one node(they start from 0), disable NUMA.
++        UseNUMA = false;
++      }
++    }
++    // With SHM large pages we cannot uncommit a page, so there's not way
++    // we can make the adaptive lgrp chunk resizing work. If the user specified
++    // both UseNUMA and UseLargePages (or UseSHM) on the command line - warn and
++    // disable adaptive resizing.
++    if (UseNUMA && UseLargePages && UseSHM) {
++      if (!FLAG_IS_DEFAULT(UseNUMA)) {
++        if (FLAG_IS_DEFAULT(UseLargePages) && FLAG_IS_DEFAULT(UseSHM)) {
++          UseLargePages = false;
++        } else {
++          warning("UseNUMA is not fully compatible with SHM large pages, disabling adaptive resizing");
++          UseAdaptiveSizePolicy = false;
++          UseAdaptiveNUMAChunkSizing = false;
++        }
++      } else {
++        UseNUMA = false;
++      }
++    }
++    if (!UseNUMA && ForceNUMA) {
++      UseNUMA = true;
++    }
++  }
++
++  if (MaxFDLimit) {
++    // set the number of file descriptors to max. print out error
++    // if getrlimit/setrlimit fails but continue regardless.
++    struct rlimit nbr_files;
++    int status = getrlimit(RLIMIT_NOFILE, &nbr_files);
++    if (status != 0) {
++      if (PrintMiscellaneous && (Verbose || WizardMode))
++        perror("os::init_2 getrlimit failed");
++    } else {
++      nbr_files.rlim_cur = nbr_files.rlim_max;
++      status = setrlimit(RLIMIT_NOFILE, &nbr_files);
++      if (status != 0) {
++        if (PrintMiscellaneous && (Verbose || WizardMode))
++          perror("os::init_2 setrlimit failed");
++      }
++    }
++  }
++
++  // Initialize lock used to serialize thread creation (see os::create_thread)
++  Linux::set_createThread_lock(new Mutex(Mutex::leaf, "createThread_lock", false));
++
++  // at-exit methods are called in the reverse order of their registration.
++  // atexit functions are called on return from main or as a result of a
++  // call to exit(3C). There can be only 32 of these functions registered
++  // and atexit() does not set errno.
++
++  if (PerfAllowAtExitRegistration) {
++    // only register atexit functions if PerfAllowAtExitRegistration is set.
++    // atexit functions can be delayed until process exit time, which
++    // can be problematic for embedded VM situations. Embedded VMs should
++    // call DestroyJavaVM() to assure that VM resources are released.
++
++    // note: perfMemory_exit_helper atexit function may be removed in
++    // the future if the appropriate cleanup code can be added to the
++    // VM_Exit VMOperation's doit method.
++    if (atexit(perfMemory_exit_helper) != 0) {
++      warning("os::init2 atexit(perfMemory_exit_helper) failed");
++    }
++  }
++
++  // initialize thread priority policy
++  prio_init();
++
++  return JNI_OK;
++}
++
++// this is called at the end of vm_initialization
++void os::init_3(void)
++{
++#ifdef JAVASE_EMBEDDED
++  // Start the MemNotifyThread
++  if (LowMemoryProtection) {
++    MemNotifyThread::start();
++  }
++  return;
++#endif
++}
++
++// Mark the polling page as unreadable
++void os::make_polling_page_unreadable(void) {
++  if( !guard_memory((char*)_polling_page, Linux::page_size()) )
++    fatal("Could not disable polling page");
++};
++
++// Mark the polling page as readable
++void os::make_polling_page_readable(void) {
++  if( !linux_mprotect((char *)_polling_page, Linux::page_size(), PROT_READ)) {
++    fatal("Could not enable polling page");
++  }
++};
++
++int os::active_processor_count() {
++  // Linux doesn't yet have a (official) notion of processor sets,
++  // so just return the number of online processors.
++  int online_cpus = ::sysconf(_SC_NPROCESSORS_ONLN);
++  assert(online_cpus > 0 && online_cpus <= processor_count(), "sanity check");
++  return online_cpus;
++}
++
++void os::set_native_thread_name(const char *name) {
++  // Not yet implemented.
++  return;
++}
++
++bool os::distribute_processes(uint length, uint* distribution) {
++  // Not yet implemented.
++  return false;
++}
++
++bool os::bind_to_processor(uint processor_id) {
++  // Not yet implemented.
++  return false;
++}
++
++///
++
++void os::SuspendedThreadTask::internal_do_task() {
++  if (do_suspend(_thread->osthread())) {
++    SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext());
++    do_task(context);
++    do_resume(_thread->osthread());
++  }
++}
++
++class PcFetcher : public os::SuspendedThreadTask {
++public:
++  PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {}
++  ExtendedPC result();
++protected:
++  void do_task(const os::SuspendedThreadTaskContext& context);
++private:
++  ExtendedPC _epc;
++};
++
++ExtendedPC PcFetcher::result() {
++  guarantee(is_done(), "task is not done yet.");
++  return _epc;
++}
++
++void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) {
++  Thread* thread = context.thread();
++  OSThread* osthread = thread->osthread();
++  if (osthread->ucontext() != NULL) {
++    _epc = os::Linux::ucontext_get_pc((ucontext_t *) context.ucontext());
++  } else {
++    // NULL context is unexpected, double-check this is the VMThread
++    guarantee(thread->is_VM_thread(), "can only be called for VMThread");
++  }
++}
++
++// Suspends the target using the signal mechanism and then grabs the PC before
++// resuming the target. Used by the flat-profiler only
++ExtendedPC os::get_thread_pc(Thread* thread) {
++  // Make sure that it is called by the watcher for the VMThread
++  assert(Thread::current()->is_Watcher_thread(), "Must be watcher");
++  assert(thread->is_VM_thread(), "Can only be called for VMThread");
++
++  PcFetcher fetcher(thread);
++  fetcher.run();
++  return fetcher.result();
++}
++
++int os::Linux::safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime)
++{
++   if (is_NPTL()) {
++      return pthread_cond_timedwait(_cond, _mutex, _abstime);
++   } else {
++#ifndef IA64
++      // 6292965: LinuxThreads pthread_cond_timedwait() resets FPU control
++      // word back to default 64bit precision if condvar is signaled. Java
++      // wants 53bit precision.  Save and restore current value.
++      int fpu = get_fpu_control_word();
++#endif // IA64
++      int status = pthread_cond_timedwait(_cond, _mutex, _abstime);
++#ifndef IA64
++      set_fpu_control_word(fpu);
++#endif // IA64
++      return status;
++   }
++}
++
++////////////////////////////////////////////////////////////////////////////////
++// debug support
++
++static address same_page(address x, address y) {
++  int page_bits = -os::vm_page_size();
++  if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits))
++    return x;
++  else if (x > y)
++    return (address)(intptr_t(y) | ~page_bits) + 1;
++  else
++    return (address)(intptr_t(y) & page_bits);
++}
++
++bool os::find(address addr, outputStream* st) {
++  Dl_info dlinfo;
++  memset(&dlinfo, 0, sizeof(dlinfo));
++  if (dladdr(addr, &dlinfo) != 0) {
++    st->print(PTR_FORMAT ": ", addr);
++    if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) {
++      st->print("%s+%#x", dlinfo.dli_sname,
++                 addr - (intptr_t)dlinfo.dli_saddr);
++    } else if (dlinfo.dli_fbase != NULL) {
++      st->print("<offset %#x>", addr - (intptr_t)dlinfo.dli_fbase);
++    } else {
++      st->print("<absolute address>");
++    }
++    if (dlinfo.dli_fname != NULL) {
++      st->print(" in %s", dlinfo.dli_fname);
++    }
++    if (dlinfo.dli_fbase != NULL) {
++      st->print(" at " PTR_FORMAT, dlinfo.dli_fbase);
++    }
++    st->cr();
++
++    if (Verbose) {
++      // decode some bytes around the PC
++      address begin = same_page(addr-40, addr);
++      address end   = same_page(addr+40, addr);
++      address       lowest = (address) dlinfo.dli_sname;
++      if (!lowest)  lowest = (address) dlinfo.dli_fbase;
++      if (begin < lowest)  begin = lowest;
++      Dl_info dlinfo2;
++      if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr
++          && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin)
++        end = (address) dlinfo2.dli_saddr;
++      Disassembler::decode(begin, end, st);
++    }
++    return true;
++  }
++  return false;
++}
++
++////////////////////////////////////////////////////////////////////////////////
++// misc
++
++// This does not do anything on Linux. This is basically a hook for being
++// able to use structured exception handling (thread-local exception filters)
++// on, e.g., Win32.
++void
++os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method,
++                         JavaCallArguments* args, Thread* thread) {
++  f(value, method, args, thread);
++}
++
++void os::print_statistics() {
++}
++
++int os::message_box(const char* title, const char* message) {
++  int i;
++  fdStream err(defaultStream::error_fd());
++  for (i = 0; i < 78; i++) err.print_raw("=");
++  err.cr();
++  err.print_raw_cr(title);
++  for (i = 0; i < 78; i++) err.print_raw("-");
++  err.cr();
++  err.print_raw_cr(message);
++  for (i = 0; i < 78; i++) err.print_raw("=");
++  err.cr();
++
++  char buf[16];
++  // Prevent process from exiting upon "read error" without consuming all CPU
++  while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); }
++
++  return buf[0] == 'y' || buf[0] == 'Y';
++}
++
++int os::stat(const char *path, struct stat *sbuf) {
++  char pathbuf[MAX_PATH];
++  if (strlen(path) > MAX_PATH - 1) {
++    errno = ENAMETOOLONG;
++    return -1;
++  }
++  os::native_path(strcpy(pathbuf, path));
++  return ::stat(pathbuf, sbuf);
++}
++
++bool os::check_heap(bool force) {
++  return true;
++}
++
++int local_vsnprintf(char* buf, size_t count, const char* format, va_list args) {
++  return ::vsnprintf(buf, count, format, args);
++}
++
++// Is a (classpath) directory empty?
++bool os::dir_is_empty(const char* path) {
++  DIR *dir = NULL;
++  struct dirent *ptr;
++
++  dir = opendir(path);
++  if (dir == NULL) return true;
++
++  /* Scan the directory */
++  bool result = true;
++  char buf[sizeof(struct dirent) + MAX_PATH];
++  while (result && (ptr = ::readdir(dir)) != NULL) {
++    if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
++      result = false;
++    }
++  }
++  closedir(dir);
++  return result;
++}
++
++// This code originates from JDK's sysOpen and open64_w
++// from src/solaris/hpi/src/system_md.c
++
++#ifndef O_DELETE
++#define O_DELETE 0x10000
++#endif
++
++// Open a file. Unlink the file immediately after open returns
++// if the specified oflag has the O_DELETE flag set.
++// O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c
++
++int os::open(const char *path, int oflag, int mode) {
++
++  if (strlen(path) > MAX_PATH - 1) {
++    errno = ENAMETOOLONG;
++    return -1;
++  }
++  int fd;
++  int o_delete = (oflag & O_DELETE);
++  oflag = oflag & ~O_DELETE;
++
++  fd = ::open64(path, oflag, mode);
++  if (fd == -1) return -1;
++
++  //If the open succeeded, the file might still be a directory
++  {
++    struct stat64 buf64;
++    int ret = ::fstat64(fd, &buf64);
++    int st_mode = buf64.st_mode;
++
++    if (ret != -1) {
++      if ((st_mode & S_IFMT) == S_IFDIR) {
++        errno = EISDIR;
++        ::close(fd);
++        return -1;
++      }
++    } else {
++      ::close(fd);
++      return -1;
++    }
++  }
++
++    /*
++     * All file descriptors that are opened in the JVM and not
++     * specifically destined for a subprocess should have the
++     * close-on-exec flag set.  If we don't set it, then careless 3rd
++     * party native code might fork and exec without closing all
++     * appropriate file descriptors (e.g. as we do in closeDescriptors in
++     * UNIXProcess.c), and this in turn might:
++     *
++     * - cause end-of-file to fail to be detected on some file
++     *   descriptors, resulting in mysterious hangs, or
++     *
++     * - might cause an fopen in the subprocess to fail on a system
++     *   suffering from bug 1085341.
++     *
++     * (Yes, the default setting of the close-on-exec flag is a Unix
++     * design flaw)
++     *
++     * See:
++     * 1085341: 32-bit stdio routines should support file descriptors >255
++     * 4843136: (process) pipe file descriptor from Runtime.exec not being closed
++     * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9
++     */
++#ifdef FD_CLOEXEC
++    {
++        int flags = ::fcntl(fd, F_GETFD);
++        if (flags != -1)
++            ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
++    }
++#endif
++
++  if (o_delete != 0) {
++    ::unlink(path);
++  }
++  return fd;
++}
++
++
++// create binary file, rewriting existing file if required
++int os::create_binary_file(const char* path, bool rewrite_existing) {
++  int oflags = O_WRONLY | O_CREAT;
++  if (!rewrite_existing) {
++    oflags |= O_EXCL;
++  }
++  return ::open64(path, oflags, S_IREAD | S_IWRITE);
++}
++
++// return current position of file pointer
++jlong os::current_file_offset(int fd) {
++  return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR);
++}
++
++// move file pointer to the specified offset
++jlong os::seek_to_file_offset(int fd, jlong offset) {
++  return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET);
++}
++
++// This code originates from JDK's sysAvailable
++// from src/solaris/hpi/src/native_threads/src/sys_api_td.c
++
++int os::available(int fd, jlong *bytes) {
++  jlong cur, end;
++  int mode;
++  struct stat64 buf64;
++
++  if (::fstat64(fd, &buf64) >= 0) {
++    mode = buf64.st_mode;
++    if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
++      /*
++      * XXX: is the following call interruptible? If so, this might
++      * need to go through the INTERRUPT_IO() wrapper as for other
++      * blocking, interruptible calls in this file.
++      */
++      int n;
++      if (::ioctl(fd, FIONREAD, &n) >= 0) {
++        *bytes = n;
++        return 1;
++      }
++    }
++  }
++  if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) {
++    return 0;
++  } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) {
++    return 0;
++  } else if (::lseek64(fd, cur, SEEK_SET) == -1) {
++    return 0;
++  }
++  *bytes = end - cur;
++  return 1;
++}
++
++int os::socket_available(int fd, jint *pbytes) {
++  // Linux doc says EINTR not returned, unlike Solaris
++  int ret = ::ioctl(fd, FIONREAD, pbytes);
++
++  //%% note ioctl can return 0 when successful, JVM_SocketAvailable
++  // is expected to return 0 on failure and 1 on success to the jdk.
++  return (ret < 0) ? 0 : 1;
++}
++
++// Map a block of memory.
++char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
++                     char *addr, size_t bytes, bool read_only,
++                     bool allow_exec) {
++  int prot;
++  int flags = MAP_PRIVATE;
++
++  if (read_only) {
++    prot = PROT_READ;
++  } else {
++    prot = PROT_READ | PROT_WRITE;
++  }
++
++  if (allow_exec) {
++    prot |= PROT_EXEC;
++  }
++
++  if (addr != NULL) {
++    flags |= MAP_FIXED;
++  }
++
++  char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags,
++                                     fd, file_offset);
++  if (mapped_address == MAP_FAILED) {
++    return NULL;
++  }
++  return mapped_address;
++}
++
++
++// Remap a block of memory.
++char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
++                       char *addr, size_t bytes, bool read_only,
++                       bool allow_exec) {
++  // same as map_memory() on this OS
++  return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
++                        allow_exec);
++}
++
++
++// Unmap a block of memory.
++bool os::pd_unmap_memory(char* addr, size_t bytes) {
++  return munmap(addr, bytes) == 0;
++}
++
++static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time);
++
++static clockid_t thread_cpu_clockid(Thread* thread) {
++  pthread_t tid = thread->osthread()->pthread_id();
++  clockid_t clockid;
++
++  // Get thread clockid
++  int rc = os::Linux::pthread_getcpuclockid(tid, &clockid);
++  assert(rc == 0, "pthread_getcpuclockid is expected to return 0 code");
++  return clockid;
++}
++
++// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
++// are used by JVM M&M and JVMTI to get user+sys or user CPU time
++// of a thread.
++//
++// current_thread_cpu_time() and thread_cpu_time(Thread*) returns
++// the fast estimate available on the platform.
++
++jlong os::current_thread_cpu_time() {
++  if (os::Linux::supports_fast_thread_cpu_time()) {
++    return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID);
++  } else {
++    // return user + sys since the cost is the same
++    return slow_thread_cpu_time(Thread::current(), true /* user + sys */);
++  }
++}
++
++jlong os::thread_cpu_time(Thread* thread) {
++  // consistent with what current_thread_cpu_time() returns
++  if (os::Linux::supports_fast_thread_cpu_time()) {
++    return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread));
++  } else {
++    return slow_thread_cpu_time(thread, true /* user + sys */);
++  }
++}
++
++jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
++  if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) {
++    return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID);
++  } else {
++    return slow_thread_cpu_time(Thread::current(), user_sys_cpu_time);
++  }
++}
++
++jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
++  if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) {
++    return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread));
++  } else {
++    return slow_thread_cpu_time(thread, user_sys_cpu_time);
++  }
++}
++
++//
++//  -1 on error.
++//
++
++static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) {
++  static bool proc_pid_cpu_avail = true;
++  static bool proc_task_unchecked = true;
++  static const char *proc_stat_path = "/proc/%d/stat";
++  pid_t  tid = thread->osthread()->thread_id();
++  int i;
++  char *s;
++  char stat[2048];
++  int statlen;
++  char proc_name[64];
++  int count;
++  long sys_time, user_time;
++  char string[64];
++  char cdummy;
++  int idummy;
++  long ldummy;
++  FILE *fp;
++
++  // We first try accessing /proc/<pid>/cpu since this is faster to
++  // process.  If this file is not present (linux kernels 2.5 and above)
++  // then we open /proc/<pid>/stat.
++  if ( proc_pid_cpu_avail ) {
++    sprintf(proc_name, "/proc/%d/cpu", tid);
++    fp =  fopen(proc_name, "r");
++    if ( fp != NULL ) {
++      count = fscanf( fp, "%s %lu %lu\n", string, &user_time, &sys_time);
++      fclose(fp);
++      if ( count != 3 ) return -1;
++
++      if (user_sys_cpu_time) {
++        return ((jlong)sys_time + (jlong)user_time) * (1000000000 / clock_tics_per_sec);
++      } else {
++        return (jlong)user_time * (1000000000 / clock_tics_per_sec);
++      }
++    }
++    else proc_pid_cpu_avail = false;
++  }
++
++  // The /proc/<tid>/stat aggregates per-process usage on
++  // new Linux kernels 2.6+ where NPTL is supported.
++  // The /proc/self/task/<tid>/stat still has the per-thread usage.
++  // See bug 6328462.
++  // There can be no directory /proc/self/task on kernels 2.4 with NPTL
++  // and possibly in some other cases, so we check its availability.
++  if (proc_task_unchecked && os::Linux::is_NPTL()) {
++    // This is executed only once
++    proc_task_unchecked = false;
++    fp = fopen("/proc/self/task", "r");
++    if (fp != NULL) {
++      proc_stat_path = "/proc/self/task/%d/stat";
++      fclose(fp);
++    }
++  }
++
++  sprintf(proc_name, proc_stat_path, tid);
++  fp = fopen(proc_name, "r");
++  if ( fp == NULL ) return -1;
++  statlen = fread(stat, 1, 2047, fp);
++  stat[statlen] = '\0';
++  fclose(fp);
++
++  // Skip pid and the command string. Note that we could be dealing with
++  // weird command names, e.g. user could decide to rename java launcher
++  // to "java 1.4.2 :)", then the stat file would look like
++  //                1234 (java 1.4.2 :)) R ... ...
++  // We don't really need to know the command string, just find the last
++  // occurrence of ")" and then start parsing from there. See bug 4726580.
++  s = strrchr(stat, ')');
++  i = 0;
++  if (s == NULL ) return -1;
++
++  // Skip blank chars
++  do s++; while (isspace(*s));
++
++  count = sscanf(s,"%c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu",
++                 &cdummy, &idummy, &idummy, &idummy, &idummy, &idummy,
++                 &ldummy, &ldummy, &ldummy, &ldummy, &ldummy,
++                 &user_time, &sys_time);
++  if ( count != 13 ) return -1;
++  if (user_sys_cpu_time) {
++    return ((jlong)sys_time + (jlong)user_time) * (1000000000 / clock_tics_per_sec);
++  } else {
++    return (jlong)user_time * (1000000000 / clock_tics_per_sec);
++  }
++}
++
++void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
++  info_ptr->max_value = ALL_64_BITS;       // will not wrap in less than 64 bits
++  info_ptr->may_skip_backward = false;     // elapsed time not wall time
++  info_ptr->may_skip_forward = false;      // elapsed time not wall time
++  info_ptr->kind = JVMTI_TIMER_TOTAL_CPU;  // user+system time is returned
++}
++
++void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
++  info_ptr->max_value = ALL_64_BITS;       // will not wrap in less than 64 bits
++  info_ptr->may_skip_backward = false;     // elapsed time not wall time
++  info_ptr->may_skip_forward = false;      // elapsed time not wall time
++  info_ptr->kind = JVMTI_TIMER_TOTAL_CPU;  // user+system time is returned
++}
++
++bool os::is_thread_cpu_time_supported() {
++  return true;
++}
++
++// System loadavg support.  Returns -1 if load average cannot be obtained.
++// Linux doesn't yet have a (official) notion of processor sets,
++// so just return the system wide load average.
++int os::loadavg(double loadavg[], int nelem) {
++  return ::getloadavg(loadavg, nelem);
++}
++
++void os::pause() {
++  char filename[MAX_PATH];
++  if (PauseAtStartupFile && PauseAtStartupFile[0]) {
++    jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
++  } else {
++    jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
++  }
++
++  int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
++  if (fd != -1) {
++    struct stat buf;
++    ::close(fd);
++    while (::stat(filename, &buf) == 0) {
++      (void)::poll(NULL, 0, 100);
++    }
++  } else {
++    jio_fprintf(stderr,
++      "Could not open pause file '%s', continuing immediately.\n", filename);
++  }
++}
++
++
++// Refer to the comments in os_solaris.cpp park-unpark.
++//
++// Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can
++// hang indefinitely.  For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable.
++// For specifics regarding the bug see GLIBC BUGID 261237 :
++//    http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10837.html.
++// Briefly, pthread_cond_timedwait() calls with an expiry time that's not in the future
++// will either hang or corrupt the condvar, resulting in subsequent hangs if the condvar
++// is used.  (The simple C test-case provided in the GLIBC bug report manifests the
++// hang).  The JVM is vulernable via sleep(), Object.wait(timo), LockSupport.parkNanos()
++// and monitorenter when we're using 1-0 locking.  All those operations may result in
++// calls to pthread_cond_timedwait().  Using LD_ASSUME_KERNEL to use an older version
++// of libpthread avoids the problem, but isn't practical.
++//
++// Possible remedies:
++//
++// 1.   Establish a minimum relative wait time.  50 to 100 msecs seems to work.
++//      This is palliative and probabilistic, however.  If the thread is preempted
++//      between the call to compute_abstime() and pthread_cond_timedwait(), more
++//      than the minimum period may have passed, and the abstime may be stale (in the
++//      past) resultin in a hang.   Using this technique reduces the odds of a hang
++//      but the JVM is still vulnerable, particularly on heavily loaded systems.
++//
++// 2.   Modify park-unpark to use per-thread (per ParkEvent) pipe-pairs instead
++//      of the usual flag-condvar-mutex idiom.  The write side of the pipe is set
++//      NDELAY. unpark() reduces to write(), park() reduces to read() and park(timo)
++//      reduces to poll()+read().  This works well, but consumes 2 FDs per extant
++//      thread.
++//
++// 3.   Embargo pthread_cond_timedwait() and implement a native "chron" thread
++//      that manages timeouts.  We'd emulate pthread_cond_timedwait() by enqueuing
++//      a timeout request to the chron thread and then blocking via pthread_cond_wait().
++//      This also works well.  In fact it avoids kernel-level scalability impediments
++//      on certain platforms that don't handle lots of active pthread_cond_timedwait()
++//      timers in a graceful fashion.
++//
++// 4.   When the abstime value is in the past it appears that control returns
++//      correctly from pthread_cond_timedwait(), but the condvar is left corrupt.
++//      Subsequent timedwait/wait calls may hang indefinitely.  Given that, we
++//      can avoid the problem by reinitializing the condvar -- by cond_destroy()
++//      followed by cond_init() -- after all calls to pthread_cond_timedwait().
++//      It may be possible to avoid reinitialization by checking the return
++//      value from pthread_cond_timedwait().  In addition to reinitializing the
++//      condvar we must establish the invariant that cond_signal() is only called
++//      within critical sections protected by the adjunct mutex.  This prevents
++//      cond_signal() from "seeing" a condvar that's in the midst of being
++//      reinitialized or that is corrupt.  Sadly, this invariant obviates the
++//      desirable signal-after-unlock optimization that avoids futile context switching.
++//
++//      I'm also concerned that some versions of NTPL might allocate an auxilliary
++//      structure when a condvar is used or initialized.  cond_destroy()  would
++//      release the helper structure.  Our reinitialize-after-timedwait fix
++//      put excessive stress on malloc/free and locks protecting the c-heap.
++//
++// We currently use (4).  See the WorkAroundNTPLTimedWaitHang flag.
++// It may be possible to refine (4) by checking the kernel and NTPL verisons
++// and only enabling the work-around for vulnerable environments.
++
++// utility to compute the abstime argument to timedwait:
++// millis is the relative timeout time
++// abstime will be the absolute timeout time
++// TODO: replace compute_abstime() with unpackTime()
++
++static struct timespec* compute_abstime(timespec* abstime, jlong millis) {
++  if (millis < 0)  millis = 0;
++  struct timeval now;
++  int status = gettimeofday(&now, NULL);
++  assert(status == 0, "gettimeofday");
++  jlong seconds = millis / 1000;
++  millis %= 1000;
++  if (seconds > 50000000) { // see man cond_timedwait(3T)
++    seconds = 50000000;
++  }
++  abstime->tv_sec = now.tv_sec  + seconds;
++  long       usec = now.tv_usec + millis * 1000;
++  if (usec >= 1000000) {
++    abstime->tv_sec += 1;
++    usec -= 1000000;
++  }
++  abstime->tv_nsec = usec * 1000;
++  return abstime;
++}
++
++
++// Test-and-clear _Event, always leaves _Event set to 0, returns immediately.
++// Conceptually TryPark() should be equivalent to park(0).
++
++int os::PlatformEvent::TryPark() {
++  for (;;) {
++    const int v = _Event ;
++    guarantee ((v == 0) || (v == 1), "invariant") ;
++    if (Atomic::cmpxchg (0, &_Event, v) == v) return v  ;
++  }
++}
++
++void os::PlatformEvent::park() {       // AKA "down()"
++  // Invariant: Only the thread associated with the Event/PlatformEvent
++  // may call park().
++  // TODO: assert that _Assoc != NULL or _Assoc == Self
++  int v ;
++  for (;;) {
++      v = _Event ;
++      if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
++  }
++  guarantee (v >= 0, "invariant") ;
++  if (v == 0) {
++     // Do this the hard way by blocking ...
++     int status = pthread_mutex_lock(_mutex);
++     assert_status(status == 0, status, "mutex_lock");
++     guarantee (_nParked == 0, "invariant") ;
++     ++ _nParked ;
++     while (_Event < 0) {
++        status = pthread_cond_wait(_cond, _mutex);
++        // for some reason, under 2.7 lwp_cond_wait() may return ETIME ...
++        // Treat this the same as if the wait was interrupted
++        if (status == ETIME) { status = EINTR; }
++        assert_status(status == 0 || status == EINTR, status, "cond_wait");
++     }
++     -- _nParked ;
++
++    _Event = 0 ;
++     status = pthread_mutex_unlock(_mutex);
++     assert_status(status == 0, status, "mutex_unlock");
++    // Paranoia to ensure our locked and lock-free paths interact
++    // correctly with each other.
++    OrderAccess::fence();
++  }
++  guarantee (_Event >= 0, "invariant") ;
++}
++
++int os::PlatformEvent::park(jlong millis) {
++  guarantee (_nParked == 0, "invariant") ;
++
++  int v ;
++  for (;;) {
++      v = _Event ;
++      if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
++  }
++  guarantee (v >= 0, "invariant") ;
++  if (v != 0) return OS_OK ;
++
++  // We do this the hard way, by blocking the thread.
++  // Consider enforcing a minimum timeout value.
++  struct timespec abst;
++  compute_abstime(&abst, millis);
++
++  int ret = OS_TIMEOUT;
++  int status = pthread_mutex_lock(_mutex);
++  assert_status(status == 0, status, "mutex_lock");
++  guarantee (_nParked == 0, "invariant") ;
++  ++_nParked ;
++
++  // Object.wait(timo) will return because of
++  // (a) notification
++  // (b) timeout
++  // (c) thread.interrupt
++  //
++  // Thread.interrupt and object.notify{All} both call Event::set.
++  // That is, we treat thread.interrupt as a special case of notification.
++  // The underlying Solaris implementation, cond_timedwait, admits
++  // spurious/premature wakeups, but the JLS/JVM spec prevents the
++  // JVM from making those visible to Java code.  As such, we must
++  // filter out spurious wakeups.  We assume all ETIME returns are valid.
++  //
++  // TODO: properly differentiate simultaneous notify+interrupt.
++  // In that case, we should propagate the notify to another waiter.
++
++  while (_Event < 0) {
++    status = os::Linux::safe_cond_timedwait(_cond, _mutex, &abst);
++    if (status != 0 && WorkAroundNPTLTimedWaitHang) {
++      pthread_cond_destroy (_cond);
++      pthread_cond_init (_cond, NULL) ;
++    }
++    assert_status(status == 0 || status == EINTR ||
++                  status == ETIME || status == ETIMEDOUT,
++                  status, "cond_timedwait");
++    if (!FilterSpuriousWakeups) break ;                 // previous semantics
++    if (status == ETIME || status == ETIMEDOUT) break ;
++    // We consume and ignore EINTR and spurious wakeups.
++  }
++  --_nParked ;
++  if (_Event >= 0) {
++     ret = OS_OK;
++  }
++  _Event = 0 ;
++  status = pthread_mutex_unlock(_mutex);
++  assert_status(status == 0, status, "mutex_unlock");
++  assert (_nParked == 0, "invariant") ;
++  // Paranoia to ensure our locked and lock-free paths interact
++  // correctly with each other.
++  OrderAccess::fence();
++  return ret;
++}
++
++void os::PlatformEvent::unpark() {
++  // Transitions for _Event:
++  //    0 :=> 1
++  //    1 :=> 1
++  //   -1 :=> either 0 or 1; must signal target thread
++  //          That is, we can safely transition _Event from -1 to either
++  //          0 or 1. Forcing 1 is slightly more efficient for back-to-back
++  //          unpark() calls.
++  // See also: "Semaphores in Plan 9" by Mullender & Cox
++  //
++  // Note: Forcing a transition from "-1" to "1" on an unpark() means
++  // that it will take two back-to-back park() calls for the owning
++  // thread to block. This has the benefit of forcing a spurious return
++  // from the first park() call after an unpark() call which will help
++  // shake out uses of park() and unpark() without condition variables.
++
++  if (Atomic::xchg(1, &_Event) >= 0) return;
++
++  // Wait for the thread associated with the event to vacate
++  int status = pthread_mutex_lock(_mutex);
++  assert_status(status == 0, status, "mutex_lock");
++  int AnyWaiters = _nParked;
++  assert(AnyWaiters == 0 || AnyWaiters == 1, "invariant");
++  if (AnyWaiters != 0 && WorkAroundNPTLTimedWaitHang) {
++    AnyWaiters = 0;
++    pthread_cond_signal(_cond);
++  }
++  status = pthread_mutex_unlock(_mutex);
++  assert_status(status == 0, status, "mutex_unlock");
++  if (AnyWaiters != 0) {
++    status = pthread_cond_signal(_cond);
++    assert_status(status == 0, status, "cond_signal");
++  }
++
++  // Note that we signal() _after dropping the lock for "immortal" Events.
++  // This is safe and avoids a common class of  futile wakeups.  In rare
++  // circumstances this can cause a thread to return prematurely from
++  // cond_{timed}wait() but the spurious wakeup is benign and the victim will
++  // simply re-test the condition and re-park itself.
++}
++
++
++// JSR166
++// -------------------------------------------------------
++
++/*
++ * The solaris and linux implementations of park/unpark are fairly
++ * conservative for now, but can be improved. They currently use a
++ * mutex/condvar pair, plus a a count.
++ * Park decrements count if > 0, else does a condvar wait.  Unpark
++ * sets count to 1 and signals condvar.  Only one thread ever waits
++ * on the condvar. Contention seen when trying to park implies that someone
++ * is unparking you, so don't wait. And spurious returns are fine, so there
++ * is no need to track notifications.
++ */
++
++#define MAX_SECS 100000000
++/*
++ * This code is common to linux and solaris and will be moved to a
++ * common place in dolphin.
++ *
++ * The passed in time value is either a relative time in nanoseconds
++ * or an absolute time in milliseconds. Either way it has to be unpacked
++ * into suitable seconds and nanoseconds components and stored in the
++ * given timespec structure.
++ * Given time is a 64-bit value and the time_t used in the timespec is only
++ * a signed-32-bit value (except on 64-bit Linux) we have to watch for
++ * overflow if times way in the future are given. Further on Solaris versions
++ * prior to 10 there is a restriction (see cond_timedwait) that the specified
++ * number of seconds, in abstime, is less than current_time  + 100,000,000.
++ * As it will be 28 years before "now + 100000000" will overflow we can
++ * ignore overflow and just impose a hard-limit on seconds using the value
++ * of "now + 100,000,000". This places a limit on the timeout of about 3.17
++ * years from "now".
++ */
++
++static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) {
++  assert (time > 0, "convertTime");
++
++  struct timeval now;
++  int status = gettimeofday(&now, NULL);
++  assert(status == 0, "gettimeofday");
++
++  time_t max_secs = now.tv_sec + MAX_SECS;
++
++  if (isAbsolute) {
++    jlong secs = time / 1000;
++    if (secs > max_secs) {
++      absTime->tv_sec = max_secs;
++    }
++    else {
++      absTime->tv_sec = secs;
++    }
++    absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC;
++  }
++  else {
++    jlong secs = time / NANOSECS_PER_SEC;
++    if (secs >= MAX_SECS) {
++      absTime->tv_sec = max_secs;
++      absTime->tv_nsec = 0;
++    }
++    else {
++      absTime->tv_sec = now.tv_sec + secs;
++      absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000;
++      if (absTime->tv_nsec >= NANOSECS_PER_SEC) {
++        absTime->tv_nsec -= NANOSECS_PER_SEC;
++        ++absTime->tv_sec; // note: this must be <= max_secs
++      }
++    }
++  }
++  assert(absTime->tv_sec >= 0, "tv_sec < 0");
++  assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs");
++  assert(absTime->tv_nsec >= 0, "tv_nsec < 0");
++  assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec");
++}
++
++void Parker::park(bool isAbsolute, jlong time) {
++  // Ideally we'd do something useful while spinning, such
++  // as calling unpackTime().
++
++  // Optional fast-path check:
++  // Return immediately if a permit is available.
++  // We depend on Atomic::xchg() having full barrier semantics
++  // since we are doing a lock-free update to _counter.
++  if (Atomic::xchg(0, &_counter) > 0) return;
++
++  Thread* thread = Thread::current();
++  assert(thread->is_Java_thread(), "Must be JavaThread");
++  JavaThread *jt = (JavaThread *)thread;
++
++  // Optional optimization -- avoid state transitions if there's an interrupt pending.
++  // Check interrupt before trying to wait
++  if (Thread::is_interrupted(thread, false)) {
++    return;
++  }
++
++  // Next, demultiplex/decode time arguments
++  timespec absTime;
++  if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all
++    return;
++  }
++  if (time > 0) {
++    unpackTime(&absTime, isAbsolute, time);
++  }
++
++
++  // Enter safepoint region
++  // Beware of deadlocks such as 6317397.
++  // The per-thread Parker:: mutex is a classic leaf-lock.
++  // In particular a thread must never block on the Threads_lock while
++  // holding the Parker:: mutex.  If safepoints are pending both the
++  // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock.
++  ThreadBlockInVM tbivm(jt);
++
++  // Don't wait if cannot get lock since interference arises from
++  // unblocking.  Also. check interrupt before trying wait
++  if (Thread::is_interrupted(thread, false) || pthread_mutex_trylock(_mutex) != 0) {
++    return;
++  }
++
++  int status ;
++  if (_counter > 0)  { // no wait needed
++    _counter = 0;
++    status = pthread_mutex_unlock(_mutex);
++    assert (status == 0, "invariant") ;
++    // Paranoia to ensure our locked and lock-free paths interact
++    // correctly with each other and Java-level accesses.
++    OrderAccess::fence();
++    return;
++  }
++
++#ifdef ASSERT
++  // Don't catch signals while blocked; let the running threads have the signals.
++  // (This allows a debugger to break into the running thread.)
++  sigset_t oldsigs;
++  sigset_t* allowdebug_blocked = os::Linux::allowdebug_blocked_signals();
++  pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs);
++#endif
++
++  OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
++  jt->set_suspend_equivalent();
++  // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
++
++  if (time == 0) {
++    status = pthread_cond_wait (_cond, _mutex) ;
++  } else {
++    status = os::Linux::safe_cond_timedwait (_cond, _mutex, &absTime) ;
++    if (status != 0 && WorkAroundNPTLTimedWaitHang) {
++      pthread_cond_destroy (_cond) ;
++      pthread_cond_init    (_cond, NULL);
++    }
++  }
++  assert_status(status == 0 || status == EINTR ||
++                status == ETIME || status == ETIMEDOUT,
++                status, "cond_timedwait");
++
++#ifdef ASSERT
++  pthread_sigmask(SIG_SETMASK, &oldsigs, NULL);
++#endif
++
++  _counter = 0 ;
++  status = pthread_mutex_unlock(_mutex) ;
++  assert_status(status == 0, status, "invariant") ;
++  // Paranoia to ensure our locked and lock-free paths interact
++  // correctly with each other and Java-level accesses.
++  OrderAccess::fence();
++
++  // If externally suspended while waiting, re-suspend
++  if (jt->handle_special_suspend_equivalent_condition()) {
++    jt->java_suspend_self();
++  }
++}
++
++void Parker::unpark() {
++  int s, status ;
++  status = pthread_mutex_lock(_mutex);
++  assert (status == 0, "invariant") ;
++  s = _counter;
++  _counter = 1;
++  if (s < 1) {
++     if (WorkAroundNPTLTimedWaitHang) {
++        status = pthread_cond_signal (_cond) ;
++        assert (status == 0, "invariant") ;
++        status = pthread_mutex_unlock(_mutex);
++        assert (status == 0, "invariant") ;
++     } else {
++        status = pthread_mutex_unlock(_mutex);
++        assert (status == 0, "invariant") ;
++        status = pthread_cond_signal (_cond) ;
++        assert (status == 0, "invariant") ;
++     }
++  } else {
++    pthread_mutex_unlock(_mutex);
++    assert (status == 0, "invariant") ;
++  }
++}
++
++
++extern char** environ;
++
++// Run the specified command in a separate process. Return its exit value,
++// or -1 on failure (e.g. can't fork a new process).
++// Unlike system(), this function can be called from signal handler. It
++// doesn't block SIGINT et al.
++int os::fork_and_exec(char* cmd) {
++  const char * argv[4] = {"sh", "-c", cmd, NULL};
++
++  // fork() in LinuxThreads/NPTL is not async-safe. It needs to run
++  // pthread_atfork handlers and reset pthread library. All we need is a
++  // separate process to execve. Make a direct syscall to fork process.
++  // On IA64 there's no fork syscall, we have to use fork() and hope for
++  // the best...
++  pid_t pid = NOT_IA64(NOT_AARCH64(syscall(SYS_fork);))
++              IA64_ONLY(fork();)
++              AARCH64_ONLY(vfork();)
++
++  if (pid < 0) {
++    // fork failed
++    return -1;
++
++  } else if (pid == 0) {
++    // child process
++
++    // execve() in LinuxThreads will call pthread_kill_other_threads_np()
++    // first to kill every thread on the thread list. Because this list is
++    // not reset by fork() (see notes above), execve() will instead kill
++    // every thread in the parent process. We know this is the only thread
++    // in the new process, so make a system call directly.
++    // IA64 should use normal execve() from glibc to match the glibc fork()
++    // above.
++    NOT_IA64(syscall(SYS_execve, "/bin/sh", argv, environ);)
++    IA64_ONLY(execve("/bin/sh", (char* const*)argv, environ);)
++
++    // execve failed
++    _exit(-1);
++
++  } else  {
++    // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't
++    // care about the actual exit code, for now.
++
++    int status;
++
++    // Wait for the child process to exit.  This returns immediately if
++    // the child has already exited. */
++    while (waitpid(pid, &status, 0) < 0) {
++        switch (errno) {
++        case ECHILD: return 0;
++        case EINTR: break;
++        default: return -1;
++        }
++    }
++
++    if (WIFEXITED(status)) {
++       // The child exited normally; get its exit code.
++       return WEXITSTATUS(status);
++    } else if (WIFSIGNALED(status)) {
++       // The child exited because of a signal
++       // The best value to return is 0x80 + signal number,
++       // because that is what all Unix shells do, and because
++       // it allows callers to distinguish between process exit and
++       // process death by signal.
++       return 0x80 + WTERMSIG(status);
++    } else {
++       // Unknown exit code; pass it through
++       return status;
++    }
++  }
++}
++
++// is_headless_jre()
++//
++// Test for the existence of xawt/libmawt.so or libawt_xawt.so
++// in order to report if we are running in a headless jre
++//
++// Since JDK8 xawt/libmawt.so was moved into the same directory
++// as libawt.so, and renamed libawt_xawt.so
++//
++bool os::is_headless_jre() {
++    struct stat statbuf;
++    char buf[MAXPATHLEN];
++    char libmawtpath[MAXPATHLEN];
++    const char *xawtstr  = "/xawt/libmawt.so";
++    const char *new_xawtstr = "/libawt_xawt.so";
++    char *p;
++
++    // Get path to libjvm.so
++    os::jvm_path(buf, sizeof(buf));
++
++    // Get rid of libjvm.so
++    p = strrchr(buf, '/');
++    if (p == NULL) return false;
++    else *p = '\0';
++
++    // Get rid of client or server
++    p = strrchr(buf, '/');
++    if (p == NULL) return false;
++    else *p = '\0';
++
++    // check xawt/libmawt.so
++    strcpy(libmawtpath, buf);
++    strcat(libmawtpath, xawtstr);
++    if (::stat(libmawtpath, &statbuf) == 0) return false;
++
++    // check libawt_xawt.so
++    strcpy(libmawtpath, buf);
++    strcat(libmawtpath, new_xawtstr);
++    if (::stat(libmawtpath, &statbuf) == 0) return false;
++
++    return true;
++}
++
++// Get the default path to the core file
++// Returns the length of the string
++int os::get_core_path(char* buffer, size_t bufferSize) {
++  const char* p = get_current_directory(buffer, bufferSize);
++
++  if (p == NULL) {
++    assert(p != NULL, "failed to get current directory");
++    return 0;
++  }
++
++  return strlen(buffer);
++}
++
++#ifdef JAVASE_EMBEDDED
++//
++// A thread to watch the '/dev/mem_notify' device, which will tell us when the OS is running low on memory.
++//
++MemNotifyThread* MemNotifyThread::_memnotify_thread = NULL;
++
++// ctor
++//
++MemNotifyThread::MemNotifyThread(int fd): Thread() {
++  assert(memnotify_thread() == NULL, "we can only allocate one MemNotifyThread");
++  _fd = fd;
++
++  if (os::create_thread(this, os::os_thread)) {
++    _memnotify_thread = this;
++    os::set_priority(this, NearMaxPriority);
++    os::start_thread(this);
++  }
++}
++
++// Where all the work gets done
++//
++void MemNotifyThread::run() {
++  assert(this == memnotify_thread(), "expected the singleton MemNotifyThread");
++
++  // Set up the select arguments
++  fd_set rfds;
++  if (_fd != -1) {
++    FD_ZERO(&rfds);
++    FD_SET(_fd, &rfds);
++  }
++
++  // Now wait for the mem_notify device to wake up
++  while (1) {
++    // Wait for the mem_notify device to signal us..
++    int rc = select(_fd+1, _fd != -1 ? &rfds : NULL, NULL, NULL, NULL);
++    if (rc == -1) {
++      perror("select!\n");
++      break;
++    } else if (rc) {
++      //ssize_t free_before = os::available_memory();
++      //tty->print ("Notified: Free: %dK \n",os::available_memory()/1024);
++
++      // The kernel is telling us there is not much memory left...
++      // try to do something about that
++
++      // If we are not already in a GC, try one.
++      if (!Universe::heap()->is_gc_active()) {
++        Universe::heap()->collect(GCCause::_allocation_failure);
++
++        //ssize_t free_after = os::available_memory();
++        //tty->print ("Post-Notify: Free: %dK\n",free_after/1024);
++        //tty->print ("GC freed: %dK\n", (free_after - free_before)/1024);
++      }
++      // We might want to do something like the following if we find the GC's are not helping...
++      // Universe::heap()->size_policy()->set_gc_time_limit_exceeded(true);
++    }
++  }
++}
++
++//
++// See if the /dev/mem_notify device exists, and if so, start a thread to monitor it.
++//
++void MemNotifyThread::start() {
++  int    fd;
++  fd = open ("/dev/mem_notify", O_RDONLY, 0);
++  if (fd < 0) {
++      return;
++  }
++
++  if (memnotify_thread() == NULL) {
++    new MemNotifyThread(fd);
++  }
++}
++
++#endif // JAVASE_EMBEDDED
+diff -Nur openjdk.orig/hotspot/src/share/vm/utilities/globalDefinitions_gcc.hpp openjdk/hotspot/src/share/vm/utilities/globalDefinitions_gcc.hpp
+--- openjdk.orig/hotspot/src/share/vm/utilities/globalDefinitions_gcc.hpp	2014-02-20 19:51:45.000000000 +0100
++++ openjdk/hotspot/src/share/vm/utilities/globalDefinitions_gcc.hpp	2014-05-13 16:14:56.641091455 +0200
+@@ -253,7 +253,7 @@
+ #elif defined(__APPLE__)
+ inline int g_isnan(double f) { return isnan(f); }
+ #elif defined(LINUX) || defined(_ALLBSD_SOURCE)
+-inline int g_isnan(float  f) { return isnanf(f); }
++inline int g_isnan(float  f) { return __isnanf(f); }
+ inline int g_isnan(double f) { return isnan(f); }
+ #else
+ #error "missing platform-specific definition here"
+@@ -267,8 +267,8 @@
+ 
+ // Checking for finiteness
+ 
+-inline int g_isfinite(jfloat  f)                 { return finite(f); }
+-inline int g_isfinite(jdouble f)                 { return finite(f); }
++inline int g_isfinite(jfloat  f)                 { return isfinite(f); }
++inline int g_isfinite(jdouble f)                 { return isfinite(f); }
+ 
+ 
+ // Wide characters
+diff -Nur openjdk.orig/jdk/make/com/sun/java/pack/Makefile openjdk/jdk/make/com/sun/java/pack/Makefile
+--- openjdk.orig/jdk/make/com/sun/java/pack/Makefile	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/make/com/sun/java/pack/Makefile	2014-05-13 16:14:56.641091455 +0200
+@@ -79,7 +79,7 @@
+   OTHER_CXXFLAGS += $(ZLIB_CFLAGS) -DSYSTEM_ZLIB
+  endif
+ else
+-  OTHER_CXXFLAGS += -DNO_ZLIB -DUNPACK_JNI
++  CXXFLAGS_COMMON += -DNO_ZLIB -DUNPACK_JNI
+   OTHER_LDLIBS += $(JVMLIB)
+ endif
+ 
+diff -Nur openjdk.orig/jdk/make/com/sun/nio/sctp/Makefile openjdk/jdk/make/com/sun/nio/sctp/Makefile
+--- openjdk.orig/jdk/make/com/sun/nio/sctp/Makefile	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/make/com/sun/nio/sctp/Makefile	2014-05-13 16:14:56.641091455 +0200
+@@ -64,7 +64,7 @@
+ COMPILER_WARNINGS_FATAL=true
+ endif
+ #OTHER_LDLIBS += -L$(LIBDIR)/$(LIBARCH) -ljava -lnet -lpthread -ldl
+-OTHER_LDLIBS += -L$(LIBDIR)/$(LIBARCH) -lnio -lnet -lpthread -ldl
++OTHER_LDLIBS += -L$(LIBDIR)/$(LIBARCH) -lnio -ljavanet -lpthread -ldl
+ endif
+ ifeq ($(PLATFORM), solaris)
+ #LIBSCTP = -lsctp
+diff -Nur openjdk.orig/jdk/make/common/Defs.gmk openjdk/jdk/make/common/Defs.gmk
+--- openjdk.orig/jdk/make/common/Defs.gmk	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/make/common/Defs.gmk	2014-05-13 16:14:56.641091455 +0200
+@@ -204,7 +204,7 @@
+       ifeq ($(PLATFORM), macosx)
+         FREETYPE_HEADERS_PATH = /usr/X11R6/include
+       else
+-        FREETYPE_HEADERS_PATH = /usr/include
++        FREETYPE_HEADERS_PATH = /usr/include/disabled
+       endif
+     endif
+   endif
+diff -Nur openjdk.orig/jdk/make/common/Sanity.gmk openjdk/jdk/make/common/Sanity.gmk
+--- openjdk.orig/jdk/make/common/Sanity.gmk	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/make/common/Sanity.gmk	2014-05-13 16:14:56.641091455 +0200
+@@ -91,8 +91,7 @@
+     sane-ld_run_path \
+     sane-alt_bootdir \
+     sane-bootdir \
+-    sane-local-bootdir \
+-    sane-alsa-headers
++    sane-local-bootdir
+ 
+ ifdef OPENJDK
+ sanity-all:: sane-freetype 
+diff -Nur openjdk.orig/jdk/make/common/shared/Platform.gmk openjdk/jdk/make/common/shared/Platform.gmk
+--- openjdk.orig/jdk/make/common/shared/Platform.gmk	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/make/common/shared/Platform.gmk	2014-05-13 16:14:56.641091455 +0200
+@@ -160,9 +160,6 @@
+   else
+     mach := $(shell uname -m)
+   endif
+-  ifneq (,$(wildcard /usr/bin/dpkg-architecture))
+-    mach := $(shell (dpkg-architecture -qDEB_HOST_ARCH_CPU 2>/dev/null || echo $(mach)) | sed 's/arm64/aarch64/;s/powerpc$$/ppc/;s/hppa/parisc/;s/ppc64el/ppc64le/')
+-  endif
+   archExpr = case "$(mach)" in \
+                 i[3-9]86) \
+                     echo i586 \
+diff -Nur openjdk.orig/jdk/make/common/shared/Sanity.gmk openjdk/jdk/make/common/shared/Sanity.gmk
+--- openjdk.orig/jdk/make/common/shared/Sanity.gmk	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/make/common/shared/Sanity.gmk	2014-05-13 16:14:56.641091455 +0200
+@@ -114,11 +114,6 @@
+     elif [ -f /etc/lsb-release ] ; then \
+       $(EGREP) DISTRIB_RELEASE /etc/lsb-release | $(SED) -e 's@.*DISTRIB_RELEASE=\(.*\)@\1@'; \
+     fi)
+-  ALSA_INCLUDE=/usr/include/alsa/version.h
+-  ALSA_LIBRARY=/usr/lib/libasound.so
+-  _ALSA_VERSION := $(shell $(EGREP) SND_LIB_VERSION_STR $(ALSA_INCLUDE) | \
+-           $(SED) -e 's@.*"\(.*\)".*@\1@' )
+-  ALSA_VERSION := $(call GetVersion,$(_ALSA_VERSION))
+ endif
+ 
+ ifeq ($(PLATFORM), macosx)
+@@ -225,7 +220,6 @@
+ 	sane-compiler \
+ 	sane-link \
+ 	sane-cacerts \
+-	sane-alsa-headers \
+ 	sane-ant_version \
+ 	sane-zip_version \
+ 	sane-unzip_version \
+@@ -1381,34 +1375,6 @@
+   endif
+ endif
+ 
+-######################################################
+-# Check that ALSA headers and libs are installed and 
+-# that the header has the right version. We only
+-# need /usr/include/alsa/version.h and /usr/lib/libasound.so
+-######################################################
+-
+-ifdef REQUIRED_ALSA_VERSION
+-  ALSA_CHECK := $(call CheckVersions,$(ALSA_VERSION),$(REQUIRED_ALSA_VERSION))
+-endif
+-sane-alsa-headers:
+-ifdef REQUIRED_ALSA_VERSION
+-	@if [ "$(ALSA_CHECK)" != "missing" ] ; then \
+-	    if [ "$(ALSA_CHECK)" != "same" -a "$(ALSA_CHECK)" != "newer"  ] ; then \
+-		$(ECHO) "ERROR: The ALSA version must be $(REQUIRED_ALSA_VERSION) or higher. \n" \
+-		"      You have the following ALSA version installed: $${alsa_version} \n" \
+-		"      Please reinstall ALSA (drivers and lib). You can download \n" \
+-		"      the source distribution from http://www.alsa-project.org \n" \
+-		"      or go to http://www.freshrpms.net/docs/alsa/ for precompiled RPM packages. \n" \
+-		"" >> $(ERROR_FILE) ; \
+-	    fi ; \
+-	else \
+-	    $(ECHO) "ERROR: You seem to not have installed ALSA $(REQUIRED_ALSA_VERSION) or higher. \n" \
+-	    "      Please install ALSA (drivers and lib). You can download the \n" \
+-	    "      source distribution from http://www.alsa-project.org or go to \n" \
+-	    "      http://www.freshrpms.net/docs/alsa/ for precompiled RPM packages. \n" \
+-	    "" >> $(ERROR_FILE) ; \
+-	fi
+-endif
+ 
+ # If a sanity file doesn't exist, just make sure it's dir exists
+ $(SANITY_FILES):
+diff -Nur openjdk.orig/jdk/make/java/instrument/Makefile openjdk/jdk/make/java/instrument/Makefile
+--- openjdk.orig/jdk/make/java/instrument/Makefile	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/make/java/instrument/Makefile	2014-05-13 16:14:56.641091455 +0200
+@@ -140,6 +140,8 @@
+ # We don't want to link against -ljava
+ JAVALIB=
+ 
++OTHER_LDLIBS += -liconv
++
+ #
+ # Add to ambient vpath so we pick up the library files
+ #
+diff -Nur openjdk.orig/jdk/make/java/net/Makefile openjdk/jdk/make/java/net/Makefile
+--- openjdk.orig/jdk/make/java/net/Makefile	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/make/java/net/Makefile	2014-05-13 16:14:56.641091455 +0200
+@@ -25,7 +25,7 @@
+ 
+ BUILDDIR = ../..
+ PACKAGE = java.net
+-LIBRARY = net
++LIBRARY = javanet
+ PRODUCT = sun
+ include $(BUILDDIR)/common/Defs.gmk
+ 
+diff -Nur openjdk.orig/jdk/make/java/nio/Makefile openjdk/jdk/make/java/nio/Makefile
+--- openjdk.orig/jdk/make/java/nio/Makefile	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/make/java/nio/Makefile	2014-05-13 16:14:56.645091463 +0200
+@@ -373,7 +373,7 @@
+ endif
+ 
+ ifeq ($(PLATFORM), linux)
+-  OTHER_LDLIBS += -L$(LIBDIR)/$(LIBARCH) -ljava -lnet -lpthread $(LIBDL)
++  OTHER_LDLIBS += -L$(LIBDIR)/$(LIBARCH) -ljava -ljavanet -lpthread $(LIBDL)
+   ifdef USE_SYSTEM_GIO
+     OTHER_LDLIBS += $(GIO_LIBS)
+     OTHER_INCLUDES += $(GIO_CFLAGS) -DUSE_SYSTEM_GIO
+@@ -927,7 +927,7 @@
+ 
+ $(GENSOR_EXE) : $(TEMPDIR)/$(GENSOR_SRC)
+ 	$(prep-target)
+-	($(CD) $(TEMPDIR); $(NIO_CC) $(CPPFLAGS) $(LDDFLAGS) \
++	($(CD) $(TEMPDIR); $(HOST_CC) $(CPPFLAGS_FOR_BUILD) $(LDDFLAGS) \
+ 	   -o genSocketOptionRegistry$(EXE_SUFFIX) $(GENSOR_SRC))
+ 
+ ifdef NIO_PLATFORM_CLASSES_ROOT_DIR
+@@ -963,7 +963,7 @@
+ 
+ $(GENUC_EXE) : $(GENUC_SRC)
+ 	$(prep-target)
+-	$(NIO_CC) $(CPPFLAGS) -o $@ $(GENUC_SRC)
++	$(HOST_CC) $(CPPFLAGS_FOR_BUILD) -o $@ $(GENUC_SRC)
+ 
+ ifdef NIO_PLATFORM_CLASSES_ROOT_DIR
+ $(SFS_GEN)/UnixConstants.java: $(NIO_PLATFORM_CLASSES_ROOT_DIR)/sun/nio/fs/UnixConstants-$(PLATFORM)-$(ARCH).java
+diff -Nur openjdk.orig/jdk/make/java/npt/Makefile openjdk/jdk/make/java/npt/Makefile
+--- openjdk.orig/jdk/make/java/npt/Makefile	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/make/java/npt/Makefile	2014-05-13 16:14:56.645091463 +0200
+@@ -64,6 +64,8 @@
+ # We don't want to link against -ljava
+ JAVALIB=
+ 
++OTHER_LDLIBS += -liconv
++
+ # Add -export options to explicitly spell exported symbols
+ ifeq ($(PLATFORM), windows)
+   OTHER_LCF += -export:nptInitialize -export:nptTerminate
+diff -Nur openjdk.orig/jdk/make/sun/awt/mawt.gmk openjdk/jdk/make/sun/awt/mawt.gmk
+--- openjdk.orig/jdk/make/sun/awt/mawt.gmk	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/make/sun/awt/mawt.gmk	2014-05-13 16:14:56.645091463 +0200
+@@ -151,22 +151,6 @@
+ #endif
+ 
+ LIBXTST = -lXtst
+-ifeq ($(PLATFORM), linux)
+-   ifeq ($(ARCH_DATA_MODEL), 64)
+-   # XXX what about the rest of them?
+-        LIBXT = -lXt
+-    else
+-    # Allows for builds on Debian GNU Linux, X11 is in a different place 
+-       LIBXT = $(firstword $(wildcard $(OPENWIN_LIB)/libXt.a) \
+-                        $(wildcard /usr/lib/libXt.a))
+-       LIBSM = $(firstword $(wildcard $(OPENWIN_LIB)/libSM.a) \
+-                        $(wildcard /usr/lib/libSM.a))
+-       LIBICE = $(firstword $(wildcard $(OPENWIN_LIB)/libICE.a) \
+-                         $(wildcard /usr/lib/libICE.a))
+-       LIBXTST = $(firstword $(wildcard $(OPENWIN_LIB)/libXtst.a) \
+-                         $(wildcard /usr/lib/libXtst.a))
+-   endif
+-endif
+ 
+ # Use -lXmu for EditRes support
+ LIBXMU_DBG	= -lXmu
+@@ -181,7 +165,7 @@
+ OTHER_CFLAGS += -DMLIB_NO_LIBSUNMATH
+ # XXX what is this define below? Isn't it motif-related?
+ OTHER_CFLAGS += -DXMSTRINGDEFINES=1
+-OTHER_LDLIBS =  $(LIBXMU) $(LIBXTST) -lXext $(LIBXT) $(LIBSM) $(LIBICE) -lX11 -lXi
++OTHER_LDLIBS =  $(LIBXMU) $(LIBXTST) -lXext -lXt -lSM -lICE -lX11 -lXi
+ endif
+ 
+ endif
+@@ -231,11 +215,6 @@
+   CPPFLAGS += -I$(PLATFORM_SRC)/native/common/deps/fontconfig2
+ endif
+ 
+-ifndef HEADLESS
+-CPPFLAGS += -I$(OPENWIN_HOME)/include 
+-LDFLAGS  += -L$(OPENWIN_LIB)
+-
+-endif # !HEADLESS
+ 
+ CPPFLAGS += -I$(SHARE_SRC)/native/$(PKGDIR)/debug \
+             -I$(SHARE_SRC)/native/$(PKGDIR)/../font \
+@@ -270,11 +249,6 @@
+ endif # !HEADLESS
+ endif # PLATFORM
+ 
+-ifeq ($(PLATFORM), linux)
+-  # Checking for the X11/extensions headers at the additional location
+-  CPPFLAGS += -I$(firstword $(wildcard $(OPENWIN_HOME)/include/X11/extensions) \
+-                        $(wildcard /usr/include/X11/extensions))
+-endif
+ 
+ ifeq ($(PLATFORM), macosx))
+   CPPFLAGS += -I$(OPENWIN_HOME)/include/X11/extensions \
+diff -Nur openjdk.orig/jdk/make/sun/awt/mawt.gmk.orig openjdk/jdk/make/sun/awt/mawt.gmk.orig
+--- openjdk.orig/jdk/make/sun/awt/mawt.gmk.orig	1970-01-01 01:00:00.000000000 +0100
++++ openjdk/jdk/make/sun/awt/mawt.gmk.orig	2014-04-12 01:23:06.000000000 +0200
+@@ -0,0 +1,297 @@
++#
++# Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
++# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
++#
++# This code is free software; you can redistribute it and/or modify it
++# under the terms of the GNU General Public License version 2 only, as
++# published by the Free Software Foundation.  Oracle designates this
++# particular file as subject to the "Classpath" exception as provided
++# by Oracle in the LICENSE file that accompanied this code.
++#
++# This code is distributed in the hope that it will be useful, but WITHOUT
++# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
++# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
++# version 2 for more details (a copy is included in the LICENSE file that
++# accompanied this code).
++#
++# You should have received a copy of the GNU General Public License version
++# 2 along with this work; if not, write to the Free Software Foundation,
++# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
++#
++# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
++# or visit www.oracle.com if you need additional information or have any
++# questions.
++#
++
++#
++# to create directory:
++#
++INIT += $(LIB_LOCATION) 
++
++#
++# Files
++#
++# mawt.gmk is just used in building X/Motif native code, so
++# this list of java files is no longer included.
++#include FILES_java_unix.gmk
++include $(BUILDDIR)/sun/awt/FILES_c_unix.gmk
++
++include $(BUILDDIR)/sun/awt/FILES_export_unix.gmk
++
++# Check which C files should be built.  Headless uses only
++# non-motif files.  Also, a version-specific motif file is
++# compiled based on the motif version.
++ifdef HEADLESS
++  FILES_c = $(FILES_NO_MOTIF_c)
++else
++#  FILES_c = $(FILES_MOTIF_c) $(FILES_NO_MOTIF_c)
++#  XXX if in FILES_MOTIF_c there are unrelated to motif stuff, create a separate list!
++  FILES_c = $(FILES_NO_MOTIF_c)
++endif
++
++ifeq ($(PLATFORM), solaris)
++  ifneq ($(ARCH), amd64)
++    FILES_reorder += reorder-$(ARCH)
++  endif
++endif
++
++#
++# Rules
++#
++
++# Class files should be built & clobbered in make/sun/awt
++# If removing this line, also reinclude sun_awt.jmk
++DONT_CLOBBER_CLASSES = true
++
++
++ifndef HEADLESS
++ifeq ($(VARIANT), OPT)
++FILES_m = ../awt/mapfile-mawt-vers
++endif
++endif
++
++# Since this library will be living in a subdirectory below the other libraries
++#   we need to add an extra runpath so that libraries in the upper directory
++#   are found at runtime.
++LD_RUNPATH_EXTRAS = ..
++
++include $(BUILDDIR)/common/Mapfile-vers.gmk
++include $(BUILDDIR)/common/Library.gmk
++
++$(LIB_LOCATION):
++	$(MKDIR) -p $@
++
++clean:: 
++
++#
++# Add to the ambient vpath to pick up files in subdirectories
++#
++vpath %.c   $(SHARE_SRC)/native/$(PKGDIR)/alphacomposite
++vpath %.c   $(SHARE_SRC)/native/$(PKGDIR)/image
++vpath %.c   $(SHARE_SRC)/native/$(PKGDIR)/image/gif
++vpath %.c   $(SHARE_SRC)/native/$(PKGDIR)/image/cvutils
++vpath %.c   $(SHARE_SRC)/native/$(PKGDIR)/shell
++vpath %.c   $(SHARE_SRC)/native/$(PKGDIR)/medialib
++vpath %.c   $(SHARE_SRC)/native/$(PKGDIR)/../java2d/opengl
++vpath %.c   $(PLATFORM_SRC)/native/$(PKGDIR)/../java2d/opengl
++vpath %.c   $(PLATFORM_SRC)/native/$(PKGDIR)/../java2d/x11
++vpath %.c   $(SHARE_SRC)/native/$(PKGDIR)/debug
++vpath %.c   $(SHARE_SRC)/native/$(PKGDIR)/../font
++vpath %.c   $(SHARE_SRC)/native/$(PKGDIR)/../java2d
++vpath %.c   $(SHARE_SRC)/native/$(PKGDIR)/../java2d/loops
++vpath %.c   $(SHARE_SRC)/native/$(PKGDIR)/../java2d/pipe
++vpath %.cpp $(SHARE_SRC)/native/$(PKGDIR)/image
++vpath %.c   $(PLATFORM_SRC)/native/$(PKGDIR)/robot_child
++
++ifndef USE_SYSTEM_CUPS
++vpath %.c   $(PLATFORM_SRC)/native/common/deps
++endif
++
++ifndef USE_SYSTEM_FONTCONFIG
++vpath %.c   $(PLATFORM_SRC)/native/common/deps/fontconfig2
++endif
++
++#
++# Libraries to link in.
++#
++
++
++ifeq ($(DEBUG_BINARIES), true)
++  CFLAGS += -g
++endif
++ifeq ($(HEADLESS),true)
++CFLAGS += -DHEADLESS=$(HEADLESS)
++CPPFLAGS += -DHEADLESS=$(HEADLESS)
++OTHER_LDLIBS =
++else
++#CFLAGS += -DMOTIF_VERSION=$(MOTIF_VERSION)
++
++#ifeq ($(STATIC_MOTIF),true)
++#    LIBXM = $(MOTIF_LIB)/libXm.a -lXp -lXmu
++#    ifeq ($(PLATFORM), linux)
++#	ifeq ($(ARCH_DATA_MODEL), 64)
++#            LIBXT = -lXt
++#        else
++#        # Allows for builds on Debian GNU Linux, X11 is in a different place 
++#	    LIBXT = $(firstword $(wildcard /usr/X11R6/lib/libXt.a) \
++#                            $(wildcard /usr/lib/libXt.a))
++#	    LIBSM = $(firstword $(wildcard /usr/X11R6/lib/libSM.a) \
++#                            $(wildcard /usr/lib/libSM.a))
++#	    LIBICE = $(firstword $(wildcard /usr/X11R6/lib/libICE.a) \
++#                             $(wildcard /usr/lib/libICE.a))
++#	endif
++#    endif
++#else
++#    LIBXM = -L$(MOTIF_LIB) -lXm -lXp
++#    ifeq ($(PLATFORM), linux)
++#	LIBXT = -lXt
++#	LIBSM = 
++#	LIBICE = 
++#    endif
++#endif
++
++LIBXTST = -lXtst
++ifeq ($(PLATFORM), linux)
++   ifeq ($(ARCH_DATA_MODEL), 64)
++   # XXX what about the rest of them?
++        LIBXT = -lXt
++    else
++    # Allows for builds on Debian GNU Linux, X11 is in a different place 
++       LIBXT = $(firstword $(wildcard $(OPENWIN_LIB)/libXt.a) \
++                        $(wildcard /usr/lib/libXt.a))
++       LIBSM = $(firstword $(wildcard $(OPENWIN_LIB)/libSM.a) \
++                        $(wildcard /usr/lib/libSM.a))
++       LIBICE = $(firstword $(wildcard $(OPENWIN_LIB)/libICE.a) \
++                         $(wildcard /usr/lib/libICE.a))
++       LIBXTST = $(firstword $(wildcard $(OPENWIN_LIB)/libXtst.a) \
++                         $(wildcard /usr/lib/libXtst.a))
++   endif
++endif
++
++# Use -lXmu for EditRes support
++LIBXMU_DBG	= -lXmu
++LIBXMU_OPT	=
++LIBXMU		= $(LIBXMU_$(VARIANT))
++
++ifeq ($(PLATFORM), solaris)
++OTHER_LDLIBS = -lXt -lXext $(LIBXTST) $(LIBXMU) -lX11 -lXi
++endif
++
++ifneq (,$(findstring $(PLATFORM), linux macosx))
++OTHER_CFLAGS += -DMLIB_NO_LIBSUNMATH
++# XXX what is this define below? Isn't it motif-related?
++OTHER_CFLAGS += -DXMSTRINGDEFINES=1
++OTHER_LDLIBS =  $(LIBXMU) $(LIBXTST) -lXext $(LIBXT) $(LIBSM) $(LIBICE) -lX11 -lXi
++endif
++
++endif
++# !HEADLESS
++
++OTHER_LDLIBS += $(JVMLIB) $(LIBCXX) \
++                -lawt $(LIBM)
++
++ifdef USE_SYSTEM_CUPS
++  OTHER_LDLIBS += $(CUPS_LIBS)
++else
++  OTHER_LDLIBS += $(LIBDL)
++endif
++
++ifdef USE_SYSTEM_FONTCONFIG
++  OTHER_LDLIBS += $(FONTCONFIG_LIBS)
++else
++  OTHER_LDLIBS += $(LIBDL)
++endif
++
++#
++# Sun CC with -Xa misdefines __STDC__ to 0 (zero).
++# The following will force checking of X11 prototypes.
++# 
++ifneq ($(CC_VERSION),gcc)
++CPPFLAGS += -DFUNCPROTO=15
++endif
++
++#
++# Other extra flags needed for compiling.
++#
++ifdef CUPS_CFLAGS
++  CPPFLAGS += $(CUPS_CFLAGS)
++else
++  CPPFLAGS += -I$(CUPS_HEADERS_PATH)
++endif
++
++ifdef USE_SYSTEM_CUPS
++  CPPFLAGS += -DUSE_SYSTEM_CUPS
++else
++  CPPFLAGS += -I$(PLATFORM_SRC)/native/common/deps
++endif
++
++ifdef USE_SYSTEM_FONTCONFIG
++  CPPFLAGS += $(FONTCONFIG_CFLAGS) -DUSE_SYSTEM_FONTCONFIG
++else
++  CPPFLAGS += -I$(PLATFORM_SRC)/native/common/deps/fontconfig2
++endif
++
++ifndef HEADLESS
++CPPFLAGS += -I$(OPENWIN_HOME)/include 
++LDFLAGS  += -L$(OPENWIN_LIB)
++
++endif # !HEADLESS
++
++CPPFLAGS += -I$(SHARE_SRC)/native/$(PKGDIR)/debug \
++            -I$(SHARE_SRC)/native/$(PKGDIR)/../font \
++            -I$(PLATFORM_SRC)/native/$(PKGDIR)/../font \
++            -I$(SHARE_SRC)/native/$(PKGDIR)/image \
++	    -I$(SHARE_SRC)/native/$(PKGDIR)/image/cvutils \
++	    -I$(SHARE_SRC)/native/$(PKGDIR)/shell \
++	    -I$(SHARE_SRC)/native/$(PKGDIR)/alphacomposite \
++            -I$(SHARE_SRC)/native/$(PKGDIR)/medialib \
++            -I$(PLATFORM_SRC)/native/$(PKGDIR)/medialib \
++	    -I$(SHARE_SRC)/native/$(PKGDIR)/../java2d \
++	    -I$(PLATFORM_SRC)/native/$(PKGDIR)/../java2d \
++	    -I$(SHARE_SRC)/native/$(PKGDIR)/../java2d/loops \
++	    -I$(SHARE_SRC)/native/$(PKGDIR)/../java2d/pipe \
++            -I$(SHARE_SRC)/native/$(PKGDIR)/../java2d/opengl \
++            -I$(PLATFORM_SRC)/native/$(PKGDIR)/../java2d/opengl \
++            -I$(PLATFORM_SRC)/native/$(PKGDIR)/../java2d/x11 \
++        -I$(SHARE_SRC)/native/$(PKGDIR)/../dc/doe \
++        -I$(SHARE_SRC)/native/$(PKGDIR)/../dc/path \
++            -I$(PLATFORM_SRC)/native/$(PKGDIR)/../jdga \
++        -I$(PLATFORM_SRC)/native/$(PKGDIR) \
++        $(EVENT_MODEL)
++
++ifeq ($(PLATFORM), macosx)
++CPPFLAGS += -I$(CUPS_HEADERS_PATH)
++
++ifndef HEADLESS
++CPPFLAGS += -I$(MOTIF_DIR)/include \
++            -I$(OPENWIN_HOME)/include 
++LDFLAGS  += -L$(MOTIF_LIB) -L$(OPENWIN_LIB)
++
++endif # !HEADLESS
++endif # PLATFORM
++
++ifeq ($(PLATFORM), linux)
++  # Checking for the X11/extensions headers at the additional location
++  CPPFLAGS += -I$(firstword $(wildcard $(OPENWIN_HOME)/include/X11/extensions) \
++                        $(wildcard /usr/include/X11/extensions))
++endif
++
++ifeq ($(PLATFORM), macosx))
++  CPPFLAGS += -I$(OPENWIN_HOME)/include/X11/extensions \
++              -I$(OPENWIN_HOME)/include 
++endif
++
++ifeq ($(PLATFORM), solaris)
++  CPPFLAGS += -I$(OPENWIN_HOME)/include/X11/extensions
++endif
++
++ifeq ($(PLATFORM), macosx)
++  CPPFLAGS += -DX11_PATH=\"$(X11_PATH)\" -DPACKAGE_PATH=\"$(PACKAGE_PATH)\"
++endif
++
++LDFLAGS += -L$(LIBDIR)/$(LIBARCH)/$(TSOBJDIR) \
++	   $(AWT_RUNPATH)
++
++CLASSES.export += java.io.InputStream \
++		  java.lang.ThreadGroup
++
+diff -Nur openjdk.orig/jdk/make/sun/splashscreen/Makefile openjdk/jdk/make/sun/splashscreen/Makefile
+--- openjdk.orig/jdk/make/sun/splashscreen/Makefile	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/make/sun/splashscreen/Makefile	2014-05-13 16:14:56.645091463 +0200
+@@ -55,6 +55,8 @@
+ 
+ JAVALIB=
+ 
++OTHER_LDLIBS += -liconv
++
+ #
+ # C Flags
+ #
+diff -Nur openjdk.orig/jdk/make/sun/xawt/Makefile openjdk/jdk/make/sun/xawt/Makefile
+--- openjdk.orig/jdk/make/sun/xawt/Makefile	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/make/sun/xawt/Makefile	2014-05-13 16:14:56.645091463 +0200
+@@ -292,16 +292,10 @@
+ SIZERS = $(SIZER).32
+ SIZERS_C = $(SIZER_32_C)
+ SIZES = $(WRAPPER_GENERATOR_DIR)/sizes.32
+-ifdef CROSS_COMPILE_ARCH
+-CFLAGS_32 = -m32
+-endif
+ else # !32
+ SIZERS = $(SIZER).64
+ SIZERS_C = $(SIZER_64_C)
+ SIZES = $(WRAPPER_GENERATOR_DIR)/sizes.64
+-ifdef CROSS_COMPILE_ARCH
+-CFLAGS_64 = -m64
+-endif
+ endif # 32
+ endif # !macosx
+ endif # solaris
+@@ -337,11 +331,7 @@
+ WRAPPER_GENERATOR_CLASS=$(WRAPPER_GENERATOR_TEMPDIR)/WrapperGenerator.class 
+ XLIBTYPES=$(PLATFORM_SRC)/classes/sun/awt/X11/generator/xlibtypes.txt
+ 
+-ifndef CROSS_COMPILE_ARCH
+-SIZERS_CC = $(CC)
+-else
+-SIZERS_CC = $(HOST_CC)
+-endif
++SIZERS_CC = $(CC) -static
+ 
+ $(SIZERS): $(SIZERS_C) 
+ 	$(prep-target)
+@@ -364,7 +354,7 @@
+ 	    $(CHMOD) +w $@;\
+ 	else	\
+ 	    $(ECHO) GENERATING $@; \
+-	    $(WRAPPER_GENERATOR_DIR)/sizer$(suffix $@) > $@; \
++	    $(QEMU) $(WRAPPER_GENERATOR_DIR)/sizer$(suffix $@) > $@; \
+ 	fi
+ 	@if [ "$(DOCOMPARE)$(suffix $@)" = "true.64" ]; then \
+ 	    $(ECHO) COMPARING $@ and $(STORED_SIZES_TMPL_$(PLATFORM)_$(LIBARCH)); \
+diff -Nur openjdk.orig/jdk/src/share/classes/java/net/AbstractPlainDatagramSocketImpl.java openjdk/jdk/src/share/classes/java/net/AbstractPlainDatagramSocketImpl.java
+--- openjdk.orig/jdk/src/share/classes/java/net/AbstractPlainDatagramSocketImpl.java	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/src/share/classes/java/net/AbstractPlainDatagramSocketImpl.java	2014-05-13 16:14:56.645091463 +0200
+@@ -69,7 +69,7 @@
+      */
+     static {
+         java.security.AccessController.doPrivileged(
+-                  new sun.security.action.LoadLibraryAction("net"));
++                  new sun.security.action.LoadLibraryAction("javanet"));
+     }
+ 
+     /**
+diff -Nur openjdk.orig/jdk/src/share/classes/java/net/AbstractPlainSocketImpl.java openjdk/jdk/src/share/classes/java/net/AbstractPlainSocketImpl.java
+--- openjdk.orig/jdk/src/share/classes/java/net/AbstractPlainSocketImpl.java	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/src/share/classes/java/net/AbstractPlainSocketImpl.java	2014-05-13 16:14:56.645091463 +0200
+@@ -78,7 +78,7 @@
+      */
+     static {
+         java.security.AccessController.doPrivileged(
+-                  new sun.security.action.LoadLibraryAction("net"));
++                  new sun.security.action.LoadLibraryAction("javanet"));
+     }
+ 
+     /**
+diff -Nur openjdk.orig/jdk/src/share/classes/java/net/DatagramPacket.java openjdk/jdk/src/share/classes/java/net/DatagramPacket.java
+--- openjdk.orig/jdk/src/share/classes/java/net/DatagramPacket.java	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/src/share/classes/java/net/DatagramPacket.java	2014-05-13 16:14:56.645091463 +0200
+@@ -47,7 +47,7 @@
+      */
+     static {
+         java.security.AccessController.doPrivileged(
+-                  new sun.security.action.LoadLibraryAction("net"));
++                  new sun.security.action.LoadLibraryAction("javanet"));
+         init();
+     }
+ 
+diff -Nur openjdk.orig/jdk/src/share/classes/java/net/InetAddress.java openjdk/jdk/src/share/classes/java/net/InetAddress.java
+--- openjdk.orig/jdk/src/share/classes/java/net/InetAddress.java	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/src/share/classes/java/net/InetAddress.java	2014-05-13 16:14:56.649091471 +0200
+@@ -267,7 +267,7 @@
+     static {
+         preferIPv6Address = java.security.AccessController.doPrivileged(
+             new GetBooleanAction("java.net.preferIPv6Addresses")).booleanValue();
+-        AccessController.doPrivileged(new LoadLibraryAction("net"));
++        AccessController.doPrivileged(new LoadLibraryAction("javanet"));
+         init();
+     }
+ 
+diff -Nur openjdk.orig/jdk/src/share/classes/java/net/NetworkInterface.java openjdk/jdk/src/share/classes/java/net/NetworkInterface.java
+--- openjdk.orig/jdk/src/share/classes/java/net/NetworkInterface.java	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/src/share/classes/java/net/NetworkInterface.java	2014-05-13 16:14:56.649091471 +0200
+@@ -53,7 +53,7 @@
+     private static final int defaultIndex; /* index of defaultInterface */
+ 
+     static {
+-        AccessController.doPrivileged(new LoadLibraryAction("net"));
++        AccessController.doPrivileged(new LoadLibraryAction("javanet"));
+         init();
+         defaultInterface = DefaultInterface.getDefault();
+         if (defaultInterface != null) {
+diff -Nur openjdk.orig/jdk/src/share/classes/sun/net/sdp/SdpSupport.java openjdk/jdk/src/share/classes/sun/net/sdp/SdpSupport.java
+--- openjdk.orig/jdk/src/share/classes/sun/net/sdp/SdpSupport.java	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/src/share/classes/sun/net/sdp/SdpSupport.java	2014-05-13 16:14:56.649091471 +0200
+@@ -76,6 +76,6 @@
+ 
+     static {
+         AccessController.doPrivileged(
+-            new sun.security.action.LoadLibraryAction("net"));
++            new sun.security.action.LoadLibraryAction("javanet"));
+     }
+ }
+diff -Nur openjdk.orig/jdk/src/share/classes/sun/net/spi/DefaultProxySelector.java openjdk/jdk/src/share/classes/sun/net/spi/DefaultProxySelector.java
+--- openjdk.orig/jdk/src/share/classes/sun/net/spi/DefaultProxySelector.java	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/src/share/classes/sun/net/spi/DefaultProxySelector.java	2014-05-13 16:14:56.649091471 +0200
+@@ -95,7 +95,7 @@
+                 }});
+         if (b != null && b.booleanValue()) {
+             java.security.AccessController.doPrivileged(
+-                      new sun.security.action.LoadLibraryAction("net"));
++                      new sun.security.action.LoadLibraryAction("javanet"));
+             hasSystemProxies = init();
+         }
+     }
+diff -Nur openjdk.orig/jdk/src/share/classes/sun/nio/ch/Util.java openjdk/jdk/src/share/classes/sun/nio/ch/Util.java
+--- openjdk.orig/jdk/src/share/classes/sun/nio/ch/Util.java	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/src/share/classes/sun/nio/ch/Util.java	2014-05-13 16:14:56.649091471 +0200
+@@ -483,7 +483,7 @@
+                 return;
+             loaded = true;
+             java.security.AccessController
+-                .doPrivileged(new sun.security.action.LoadLibraryAction("net"));
++                .doPrivileged(new sun.security.action.LoadLibraryAction("javanet"));
+             java.security.AccessController
+                 .doPrivileged(new sun.security.action.LoadLibraryAction("nio"));
+             // IOUtil must be initialized; Its native methods are called from
+diff -Nur openjdk.orig/jdk/src/solaris/classes/sun/net/dns/ResolverConfigurationImpl.java openjdk/jdk/src/solaris/classes/sun/net/dns/ResolverConfigurationImpl.java
+--- openjdk.orig/jdk/src/solaris/classes/sun/net/dns/ResolverConfigurationImpl.java	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/src/solaris/classes/sun/net/dns/ResolverConfigurationImpl.java	2014-05-13 16:14:56.649091471 +0200
+@@ -247,7 +247,7 @@
+ 
+     static {
+         java.security.AccessController.doPrivileged(
+-            new sun.security.action.LoadLibraryAction("net"));
++            new sun.security.action.LoadLibraryAction("javanet"));
+     }
+ 
+ }
+diff -Nur openjdk.orig/jdk/src/solaris/native/sun/awt/awt_InputMethod.c openjdk/jdk/src/solaris/native/sun/awt/awt_InputMethod.c
+--- openjdk.orig/jdk/src/solaris/native/sun/awt/awt_InputMethod.c	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/src/solaris/native/sun/awt/awt_InputMethod.c	2014-05-13 16:14:56.649091471 +0200
+@@ -246,7 +246,8 @@
+     if (wcs == NULL)
+         return NULL;
+ 
+-    n = len*MB_CUR_MAX + 1;
++    //evil hack for uclibc
++    n = len*1 + 1;
+ 
+     mbs = (char *) malloc(n * sizeof(char));
+     if (mbs == NULL) {
+diff -Nur openjdk.orig/jdk/src/solaris/native/sun/xawt/XToolkit.c openjdk/jdk/src/solaris/native/sun/xawt/XToolkit.c
+--- openjdk.orig/jdk/src/solaris/native/sun/xawt/XToolkit.c	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/src/solaris/native/sun/xawt/XToolkit.c	2014-05-13 16:14:56.649091471 +0200
+@@ -27,9 +27,6 @@
+ #include <X11/Xutil.h>
+ #include <X11/Xos.h>
+ #include <X11/Xatom.h>
+-#ifdef __linux__
+-#include <execinfo.h>
+-#endif
+ 
+ #include <jvm.h>
+ #include <jni.h>
+@@ -785,25 +782,6 @@
+     return ret;
+ }
+ 
+-#ifdef __linux__
+-void print_stack(void)
+-{
+-  void *array[10];
+-  size_t size;
+-  char **strings;
+-  size_t i;
+-
+-  size = backtrace (array, 10);
+-  strings = backtrace_symbols (array, size);
+-
+-  fprintf (stderr, "Obtained %zd stack frames.\n", size);
+-
+-  for (i = 0; i < size; i++)
+-     fprintf (stderr, "%s\n", strings[i]);
+-
+-  free (strings);
+-}
+-#endif
+ 
+ Window get_xawt_root_shell(JNIEnv *env) {
+   static jclass classXRootWindow = NULL;
+diff -Nur openjdk.orig/jdk/src/windows/classes/sun/net/dns/ResolverConfigurationImpl.java openjdk/jdk/src/windows/classes/sun/net/dns/ResolverConfigurationImpl.java
+--- openjdk.orig/jdk/src/windows/classes/sun/net/dns/ResolverConfigurationImpl.java	2014-04-12 01:23:06.000000000 +0200
++++ openjdk/jdk/src/windows/classes/sun/net/dns/ResolverConfigurationImpl.java	2014-05-13 16:14:56.649091471 +0200
+@@ -159,7 +159,7 @@
+ 
+     static {
+         java.security.AccessController.doPrivileged(
+-            new sun.security.action.LoadLibraryAction("net"));
++            new sun.security.action.LoadLibraryAction("javanet"));
+         init0();
+ 
+         // start the address listener thread
+diff -Nur openjdk.orig/Makefile openjdk/Makefile
+--- openjdk.orig/Makefile	2014-04-04 19:44:40.000000000 +0200
++++ openjdk/Makefile	2014-05-13 16:14:56.649091471 +0200
+@@ -53,9 +53,7 @@
+ REL_JDK_DEBUG_IMAGE_DIR = ../$(OUTPUTDIR_BASENAME-debug)/$(JDK_IMAGE_DIRNAME)
+ REL_JDK_FASTDEBUG_IMAGE_DIR = ../$(OUTPUTDIR_BASENAME-fastdebug)/$(JDK_IMAGE_DIRNAME)
+ 
+-ifndef TOPDIR
+-  TOPDIR:=.
+-endif
++TOPDIR:=.
+ 
+ ifndef JDK_TOPDIR
+   JDK_TOPDIR=$(TOPDIR)/jdk
+diff -Nur openjdk-boot.orig/hotspot/make/linux/makefiles/vm.make openjdk-boot/hotspot/make/linux/makefiles/vm.make
+--- openjdk-boot.orig/hotspot/make/linux/makefiles/vm.make	2014-02-20 19:51:45.000000000 +0100
++++ openjdk-boot/hotspot/make/linux/makefiles/vm.make	2014-05-01 20:03:03.677930438 +0200
+@@ -288,7 +288,7 @@
+   LIBS_VM                  += $(LIBS)
+ endif
+ ifeq ($(JVM_VARIANT_ZEROSHARK), true)
+-  LIBS_VM   += $(LIBFFI_LIBS) $(LLVM_LIBS)
++  LIBS_VM   += $(LLVM_LIBS)
+   LFLAGS_VM += $(LLVM_LDFLAGS)
+ endif
+ 
+diff -Nur openjdk-boot.orig/hotspot/make/linux/makefiles/zero.make openjdk-boot/hotspot/make/linux/makefiles/zero.make
+--- openjdk-boot.orig/hotspot/make/linux/makefiles/zero.make	2014-02-20 19:51:45.000000000 +0100
++++ openjdk-boot/hotspot/make/linux/makefiles/zero.make	2014-05-01 20:03:03.677930438 +0200
+@@ -33,4 +33,4 @@
+ 
+ # Make sure libffi is included
+ CFLAGS += $(LIBFFI_CFLAGS)
+-LIBS_VM += $(LIBFFI_LIBS)
++LIBS_VM += $(FFI_LDFLAGS) -Wl,-Bstatic $(LIBFFI_LIBS) -Wl,-Bdynamic
+diff -Nur openjdk-boot.orig/jdk/make/common/Sanity.gmk openjdk-boot/jdk/make/common/Sanity.gmk
+--- openjdk-boot.orig/jdk/make/common/Sanity.gmk	2014-04-12 01:23:06.000000000 +0200
++++ openjdk-boot/jdk/make/common/Sanity.gmk	2014-05-01 20:03:03.677930438 +0200
+@@ -91,8 +91,7 @@
+     sane-ld_run_path \
+     sane-alt_bootdir \
+     sane-bootdir \
+-    sane-local-bootdir \
+-    sane-alsa-headers
++    sane-local-bootdir
+ 
+ ifdef OPENJDK
+ sanity-all:: sane-freetype 
+diff -Nur openjdk-boot.orig/jdk/make/common/shared/Sanity.gmk openjdk-boot/jdk/make/common/shared/Sanity.gmk
+--- openjdk-boot.orig/jdk/make/common/shared/Sanity.gmk	2014-04-12 01:23:06.000000000 +0200
++++ openjdk-boot/jdk/make/common/shared/Sanity.gmk	2014-05-01 20:03:03.681930476 +0200
+@@ -114,11 +114,6 @@
+     elif [ -f /etc/lsb-release ] ; then \
+       $(EGREP) DISTRIB_RELEASE /etc/lsb-release | $(SED) -e 's@.*DISTRIB_RELEASE=\(.*\)@\1@'; \
+     fi)
+-  ALSA_INCLUDE=/usr/include/alsa/version.h
+-  ALSA_LIBRARY=/usr/lib/libasound.so
+-  _ALSA_VERSION := $(shell $(EGREP) SND_LIB_VERSION_STR $(ALSA_INCLUDE) | \
+-           $(SED) -e 's@.*"\(.*\)".*@\1@' )
+-  ALSA_VERSION := $(call GetVersion,$(_ALSA_VERSION))
+ endif
+ 
+ ifeq ($(PLATFORM), macosx)
+@@ -225,7 +220,6 @@
+ 	sane-compiler \
+ 	sane-link \
+ 	sane-cacerts \
+-	sane-alsa-headers \
+ 	sane-ant_version \
+ 	sane-zip_version \
+ 	sane-unzip_version \
+@@ -1381,35 +1375,6 @@
+   endif
+ endif
+ 
+-######################################################
+-# Check that ALSA headers and libs are installed and 
+-# that the header has the right version. We only
+-# need /usr/include/alsa/version.h and /usr/lib/libasound.so
+-######################################################
+-
+-ifdef REQUIRED_ALSA_VERSION
+-  ALSA_CHECK := $(call CheckVersions,$(ALSA_VERSION),$(REQUIRED_ALSA_VERSION))
+-endif
+-sane-alsa-headers:
+-ifdef REQUIRED_ALSA_VERSION
+-	@if [ "$(ALSA_CHECK)" != "missing" ] ; then \
+-	    if [ "$(ALSA_CHECK)" != "same" -a "$(ALSA_CHECK)" != "newer"  ] ; then \
+-		$(ECHO) "ERROR: The ALSA version must be $(REQUIRED_ALSA_VERSION) or higher. \n" \
+-		"      You have the following ALSA version installed: $${alsa_version} \n" \
+-		"      Please reinstall ALSA (drivers and lib). You can download \n" \
+-		"      the source distribution from http://www.alsa-project.org \n" \
+-		"      or go to http://www.freshrpms.net/docs/alsa/ for precompiled RPM packages. \n" \
+-		"" >> $(ERROR_FILE) ; \
+-	    fi ; \
+-	else \
+-	    $(ECHO) "ERROR: You seem to not have installed ALSA $(REQUIRED_ALSA_VERSION) or higher. \n" \
+-	    "      Please install ALSA (drivers and lib). You can download the \n" \
+-	    "      source distribution from http://www.alsa-project.org or go to \n" \
+-	    "      http://www.freshrpms.net/docs/alsa/ for precompiled RPM packages. \n" \
+-	    "" >> $(ERROR_FILE) ; \
+-	fi
+-endif
+-
+ # If a sanity file doesn't exist, just make sure it's dir exists
+ $(SANITY_FILES):
+ 	-@$(prep-target)
+diff -Nur openjdk-boot.orig/jdk/make/javax/sound/jsoundalsa/Makefile openjdk-boot/jdk/make/javax/sound/jsoundalsa/Makefile
+--- openjdk-boot.orig/jdk/make/javax/sound/jsoundalsa/Makefile	2014-04-12 01:23:06.000000000 +0200
++++ openjdk-boot/jdk/make/javax/sound/jsoundalsa/Makefile	2014-05-15 15:49:03.886269427 +0200
+@@ -72,6 +72,7 @@
+ 	-DUSE_PORTS=TRUE  \
+ 	-DUSE_PLATFORM_MIDI_OUT=TRUE \
+ 	-DUSE_PLATFORM_MIDI_IN=TRUE \
++	$(ALSA_CPPFLAGS) \
+ 	-I$(SHARE_SRC)/native/com/sun/media/sound
+ 
+ #
+diff -Nur openjdk-boot.orig/jdk/make/sun/awt/mawt.gmk openjdk-boot/jdk/make/sun/awt/mawt.gmk
+--- openjdk-boot.orig/jdk/make/sun/awt/mawt.gmk	2014-04-12 01:23:06.000000000 +0200
++++ openjdk-boot/jdk/make/sun/awt/mawt.gmk	2014-05-01 20:03:03.681930476 +0200
+@@ -270,12 +270,6 @@
+ endif # !HEADLESS
+ endif # PLATFORM
+ 
+-ifeq ($(PLATFORM), linux)
+-  # Checking for the X11/extensions headers at the additional location
+-  CPPFLAGS += -I$(firstword $(wildcard $(OPENWIN_HOME)/include/X11/extensions) \
+-                        $(wildcard /usr/include/X11/extensions))
+-endif
+-
+ ifeq ($(PLATFORM), macosx))
+   CPPFLAGS += -I$(OPENWIN_HOME)/include/X11/extensions \
+               -I$(OPENWIN_HOME)/include 
+diff -Nur openjdk-boot.orig/Makefile openjdk-boot/Makefile
+--- openjdk-boot.orig/Makefile	2014-04-04 19:44:40.000000000 +0200
++++ openjdk-boot/Makefile	2014-05-01 20:02:54.549843414 +0200
+@@ -53,9 +53,7 @@
+ REL_JDK_DEBUG_IMAGE_DIR = ../$(OUTPUTDIR_BASENAME-debug)/$(JDK_IMAGE_DIRNAME)
+ REL_JDK_FASTDEBUG_IMAGE_DIR = ../$(OUTPUTDIR_BASENAME-fastdebug)/$(JDK_IMAGE_DIRNAME)
+ 
+-ifndef TOPDIR
+-  TOPDIR:=.
+-endif
++TOPDIR:=.
+ 
+ ifndef JDK_TOPDIR
+   JDK_TOPDIR=$(TOPDIR)/jdk