diff options
Diffstat (limited to 'libc/sysdeps/linux/common')
| -rw-r--r-- | libc/sysdeps/linux/common/Makefile | 3 | ||||
| -rw-r--r-- | libc/sysdeps/linux/common/bits/dlfcn.h | 22 | ||||
| -rw-r--r-- | libc/sysdeps/linux/common/bits/machine-gmon.h | 58 | ||||
| -rw-r--r-- | libc/sysdeps/linux/common/gmon-start.c | 58 | ||||
| -rw-r--r-- | libc/sysdeps/linux/common/gmon.c | 640 |
5 files changed, 0 insertions, 781 deletions
diff --git a/libc/sysdeps/linux/common/Makefile b/libc/sysdeps/linux/common/Makefile index 1256e2376..1930351fb 100644 --- a/libc/sysdeps/linux/common/Makefile +++ b/libc/sysdeps/linux/common/Makefile @@ -57,9 +57,6 @@ CSRC= __rt_sigtimedwait.c __socketcall.c __syscall_fcntl.c \ ifneq ($(strip $(EXCLUDE_BRK)),y) CSRC+=sbrk.c endif -ifeq ($(strip $(UCLIBC_PROFILING)),y) -CSRC+=gmon.c -endif ifeq ($(strip $(UCLIBC_PROPOLICE)),y) CSRC+=ssp.c endif diff --git a/libc/sysdeps/linux/common/bits/dlfcn.h b/libc/sysdeps/linux/common/bits/dlfcn.h index e96b5c17a..75122a98a 100644 --- a/libc/sysdeps/linux/common/bits/dlfcn.h +++ b/libc/sysdeps/linux/common/bits/dlfcn.h @@ -40,25 +40,3 @@ /* Do not delete object when closed. */ #define RTLD_NODELETE 0x01000 -#ifdef __USE_GNU -/* To support profiling of shared objects it is a good idea to call - the function found using `dlsym' using the following macro since - these calls do not use the PLT. But this would mean the dynamic - loader has no chance to find out when the function is called. The - macro applies the necessary magic so that profiling is possible. - Rewrite - foo = (*fctp) (arg1, arg2); - into - foo = DL_CALL_FCT (fctp, (arg1, arg2)); -*/ -# define DL_CALL_FCT(fctp, args) \ - (_dl_mcount_wrapper_check ((void *) (fctp)), (*(fctp)) args) - -__BEGIN_DECLS - -/* This function calls the profiling functions. */ -extern void _dl_mcount_wrapper_check (void *__selfpc) __THROW; - -__END_DECLS - -#endif diff --git a/libc/sysdeps/linux/common/bits/machine-gmon.h b/libc/sysdeps/linux/common/bits/machine-gmon.h deleted file mode 100644 index 7dd36308b..000000000 --- a/libc/sysdeps/linux/common/bits/machine-gmon.h +++ /dev/null @@ -1,58 +0,0 @@ -/* Machine-dependent definitions for profiling support. Generic GCC 2 version. - Copyright (C) 1996, 1997, 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -/* GCC version 2 gives us a perfect magical function to get - just the information we need: - void *__builtin_return_address (unsigned int N) - returns the return address of the frame N frames up. */ - -/* Be warned that GCC cannot usefully compile __builtin_return_address(N) - for N != 0 on all machines. In this case, you may have to write - your own version of _mcount(). */ - -#if __GNUC__ < 2 - #error "This file uses __builtin_return_address, a GCC 2 extension." -#endif - -#include <sysdep.h> -#ifndef NO_UNDERSCORES -/* The asm symbols for C functions are `_function'. - The canonical name for the counter function is `mcount', no _. */ -void _mcount (void) asm ("mcount"); -#else -/* The canonical name for the function is `_mcount' in both C and asm, - but some old asm code might assume it's `mcount'. */ -void _mcount (void); -weak_alias (_mcount, mcount) -#endif - -static void mcount_internal (u_long frompc, u_long selfpc); - -#define _MCOUNT_DECL(frompc, selfpc) \ -static inline void mcount_internal (u_long frompc, u_long selfpc) - -#ifndef RETURN_ADDRESS -#define RETURN_ADDRESS(n) __builtin_return_address(n) -#endif - -#define MCOUNT \ -void _mcount (void) \ -{ \ - mcount_internal ((u_long) RETURN_ADDRESS (1), (u_long) RETURN_ADDRESS (0)); \ -} diff --git a/libc/sysdeps/linux/common/gmon-start.c b/libc/sysdeps/linux/common/gmon-start.c deleted file mode 100644 index 6878a7a71..000000000 --- a/libc/sysdeps/linux/common/gmon-start.c +++ /dev/null @@ -1,58 +0,0 @@ -/* Code to enable profiling at program startup. - Copyright (C) 1995,1996,1997,2000,2001,2002 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <features.h> -#include <stdlib.h> -#include <unistd.h> -#include <sys/types.h> -#include <sys/gmon.h> - -#ifdef __UCLIBC_PROFILING__ - -/* Beginning and end of our code segment. We cannot declare them - as the external functions since we want the addresses of those - labels. Taking the address of a function may have different - meanings on different platforms. */ - -extern void _start; -extern void etext; - - -void __gmon_start__ (void) -{ -#ifdef __UCLIBC_CTOR_DTOR__ - /* Protect from being called more than once. Since crti.o is linked - into every shared library, each of their init functions will call us. */ - static int called; - - if (called) - return; - - called = 1; -#endif - - /* Start keeping profiling records. */ - monstartup ((u_long) &_start, (u_long) &etext); - - /* Call _mcleanup before exiting; it will write out gmon.out from the - collected data. */ - atexit (&_mcleanup); -} -#endif - diff --git a/libc/sysdeps/linux/common/gmon.c b/libc/sysdeps/linux/common/gmon.c deleted file mode 100644 index a3444a28e..000000000 --- a/libc/sysdeps/linux/common/gmon.c +++ /dev/null @@ -1,640 +0,0 @@ -/*- - * Copyright (c) 1983, 1992, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <features.h> -#include <sys/param.h> -#include <sys/time.h> -#include <sys/gmon.h> -#include <sys/gmon_out.h> -#include <sys/uio.h> - -#include <errno.h> -#include <stdio.h> -#include <fcntl.h> -#include <unistd.h> - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <signal.h> -#include <sys/time.h> -#include <sys/types.h> - -#ifdef __UCLIBC_PROFILING__ - -/* Head of basic-block list or NULL. */ -struct __bb *__bb_head; - -struct gmonparam _gmonparam = { state: GMON_PROF_OFF }; - -/* - * See profil(2) where this is described: - */ -static int s_scale; -#define SCALE_1_TO_1 0x10000L - -#define ERR(s) write (STDERR_FILENO, s, sizeof (s) - 1) - -void moncontrol __P ((int mode)); -static void write_hist __P ((int fd)); -static void write_call_graph __P ((int fd)); -static void write_bb_counts __P ((int fd)); - -/* - * Control profiling - * profiling is what mcount checks to see if - * all the data structures are ready. - */ -void moncontrol (int mode) -{ - struct gmonparam *p = &_gmonparam; - - /* Don't change the state if we ran into an error. */ - if (p->state == GMON_PROF_ERROR) - return; - - if (mode) - { - /* start */ - profil((void *) p->kcount, p->kcountsize, p->lowpc, s_scale); - p->state = GMON_PROF_ON; - } - else - { - /* stop */ - profil(NULL, 0, 0, 0); - p->state = GMON_PROF_OFF; - } -} - - -void monstartup (u_long lowpc, u_long highpc) -{ - register int o; - char *cp; - struct gmonparam *p = &_gmonparam; - - /* - * round lowpc and highpc to multiples of the density we're using - * so the rest of the scaling (here and in gprof) stays in ints. - */ - p->lowpc = ROUNDDOWN(lowpc, HISTFRACTION * sizeof(HISTCOUNTER)); - p->highpc = ROUNDUP(highpc, HISTFRACTION * sizeof(HISTCOUNTER)); - p->textsize = p->highpc - p->lowpc; - p->kcountsize = p->textsize / HISTFRACTION; - p->hashfraction = HASHFRACTION; - p->log_hashfraction = -1; - /* The following test must be kept in sync with the corresponding - test in mcount.c. */ - if ((HASHFRACTION & (HASHFRACTION - 1)) == 0) { - /* if HASHFRACTION is a power of two, mcount can use shifting - instead of integer division. Precompute shift amount. */ - p->log_hashfraction = ffs(p->hashfraction * sizeof(*p->froms)) - 1; - } - p->fromssize = p->textsize / HASHFRACTION; - p->tolimit = p->textsize * ARCDENSITY / 100; - if (p->tolimit < MINARCS) - p->tolimit = MINARCS; - else if (p->tolimit > MAXARCS) - p->tolimit = MAXARCS; - p->tossize = p->tolimit * sizeof(struct tostruct); - - cp = calloc (p->kcountsize + p->fromssize + p->tossize, 1); - if (! cp) - { - ERR("monstartup: out of memory\n"); - p->tos = NULL; - p->state = GMON_PROF_ERROR; - return; - } - p->tos = (struct tostruct *)cp; - cp += p->tossize; - p->kcount = (HISTCOUNTER *)cp; - cp += p->kcountsize; - p->froms = (ARCINDEX *)cp; - - p->tos[0].link = 0; - - o = p->highpc - p->lowpc; - if (p->kcountsize < (u_long) o) - { -#ifndef hp300 - s_scale = ((float)p->kcountsize / o ) * SCALE_1_TO_1; -#else - /* avoid floating point operations */ - int quot = o / p->kcountsize; - - if (quot >= 0x10000) - s_scale = 1; - else if (quot >= 0x100) - s_scale = 0x10000 / quot; - else if (o >= 0x800000) - s_scale = 0x1000000 / (o / (p->kcountsize >> 8)); - else - s_scale = 0x1000000 / ((o << 8) / p->kcountsize); -#endif - } else - s_scale = SCALE_1_TO_1; - - moncontrol(1); -} - - -/* Return frequency of ticks reported by profil. */ -static int profile_frequency (void) -{ - /* - * Discover the tick frequency of the machine if something goes wrong, - * we return 0, an impossible hertz. - */ - struct itimerval tim; - - tim.it_interval.tv_sec = 0; - tim.it_interval.tv_usec = 1; - tim.it_value.tv_sec = 0; - tim.it_value.tv_usec = 0; - setitimer(ITIMER_REAL, &tim, 0); - setitimer(ITIMER_REAL, 0, &tim); - if (tim.it_interval.tv_usec < 2) - return 0; - return (1000000 / tim.it_interval.tv_usec); -} - - -static void write_hist (int fd) -{ - u_char tag = GMON_TAG_TIME_HIST; - struct gmon_hist_hdr thdr __attribute__ ((aligned (__alignof__ (char *)))); - - if (_gmonparam.kcountsize > 0) - { - struct iovec iov[3] = - { - { &tag, sizeof (tag) }, - { &thdr, sizeof (struct gmon_hist_hdr) }, - { _gmonparam.kcount, _gmonparam.kcountsize } - }; - - *(char **) thdr.low_pc = (char *) _gmonparam.lowpc; - *(char **) thdr.high_pc = (char *) _gmonparam.highpc; - *(int32_t *) thdr.hist_size = (_gmonparam.kcountsize - / sizeof (HISTCOUNTER)); - *(int32_t *) thdr.prof_rate = profile_frequency (); - strncpy (thdr.dimen, "seconds", sizeof (thdr.dimen)); - thdr.dimen_abbrev = 's'; - - writev (fd, iov, 3); - } -} - - -static void write_call_graph (int fd) -{ -#define NARCS_PER_WRITEV 32 - u_char tag = GMON_TAG_CG_ARC; - struct gmon_cg_arc_record raw_arc[NARCS_PER_WRITEV] - __attribute__ ((aligned (__alignof__ (char*)))); - ARCINDEX from_index, to_index, from_len; - u_long frompc; - struct iovec iov[2 * NARCS_PER_WRITEV]; - int nfilled; - - for (nfilled = 0; nfilled < NARCS_PER_WRITEV; ++nfilled) - { - iov[2 * nfilled].iov_base = &tag; - iov[2 * nfilled].iov_len = sizeof (tag); - - iov[2 * nfilled + 1].iov_base = &raw_arc[nfilled]; - iov[2 * nfilled + 1].iov_len = sizeof (struct gmon_cg_arc_record); - } - - nfilled = 0; - from_len = _gmonparam.fromssize / sizeof (*_gmonparam.froms); - for (from_index = 0; from_index < from_len; ++from_index) - { - if (_gmonparam.froms[from_index] == 0) - continue; - - frompc = _gmonparam.lowpc; - frompc += (from_index * _gmonparam.hashfraction - * sizeof (*_gmonparam.froms)); - for (to_index = _gmonparam.froms[from_index]; - to_index != 0; - to_index = _gmonparam.tos[to_index].link) - { - struct arc - { - char *frompc; - char *selfpc; - int32_t count; - } - arc; - - arc.frompc = (char *) frompc; - arc.selfpc = (char *) _gmonparam.tos[to_index].selfpc; - arc.count = _gmonparam.tos[to_index].count; - memcpy (raw_arc + nfilled, &arc, sizeof (raw_arc [0])); - - if (++nfilled == NARCS_PER_WRITEV) - { - writev (fd, iov, 2 * nfilled); - nfilled = 0; - } - } - } - if (nfilled > 0) - writev (fd, iov, 2 * nfilled); -} - - -static void write_bb_counts (int fd) -{ - struct __bb *grp; - u_char tag = GMON_TAG_BB_COUNT; - size_t ncounts; - size_t i; - - struct iovec bbhead[2] = - { - { &tag, sizeof (tag) }, - { &ncounts, sizeof (ncounts) } - }; - struct iovec bbbody[8]; - size_t nfilled; - - for (i = 0; i < (sizeof (bbbody) / sizeof (bbbody[0])); i += 2) - { - bbbody[i].iov_len = sizeof (grp->addresses[0]); - bbbody[i + 1].iov_len = sizeof (grp->counts[0]); - } - - /* Write each group of basic-block info (all basic-blocks in a - compilation unit form a single group). */ - - for (grp = __bb_head; grp; grp = grp->next) - { - ncounts = grp->ncounts; - writev (fd, bbhead, 2); - for (nfilled = i = 0; i < ncounts; ++i) - { - if (nfilled > (sizeof (bbbody) / sizeof (bbbody[0])) - 2) - { - writev (fd, bbbody, nfilled); - nfilled = 0; - } - - bbbody[nfilled++].iov_base = (char *) &grp->addresses[i]; - bbbody[nfilled++].iov_base = &grp->counts[i]; - } - if (nfilled > 0) - writev (fd, bbbody, nfilled); - } -} - - -static void write_gmon (void) -{ - struct gmon_hdr ghdr __attribute__ ((aligned (__alignof__ (int)))); - int fd = -1; - char *env; - -#ifndef O_NOFOLLOW -# define O_NOFOLLOW 0 -#endif - - env = getenv ("GMON_OUT_PREFIX"); - if (env != NULL -#if 0 - && !__libc_enable_secure -#endif - ) - { - size_t len = strlen (env); - char buf[len + 20]; - sprintf (buf, "%s.%u", env, getpid ()); - fd = open (buf, O_CREAT|O_TRUNC|O_WRONLY|O_NOFOLLOW, 0666); - } - - if (fd == -1) - { - fd = open ("gmon.out", O_CREAT|O_TRUNC|O_WRONLY|O_NOFOLLOW, 0666); - if (fd < 0) - { - char buf[300]; - int errnum = errno; - fprintf (stderr, "_mcleanup: gmon.out: %s\n", - strerror_r (errnum, buf, sizeof buf)); - return; - } - } - - /* write gmon.out header: */ - memset (&ghdr, '\0', sizeof (struct gmon_hdr)); - memcpy (&ghdr.cookie[0], GMON_MAGIC, sizeof (ghdr.cookie)); - *(int32_t *) ghdr.version = GMON_VERSION; - write (fd, &ghdr, sizeof (struct gmon_hdr)); - - /* write PC histogram: */ - write_hist (fd); - - /* write call-graph: */ - write_call_graph (fd); - - /* write basic-block execution counts: */ - write_bb_counts (fd); - - close (fd); -} - - -void write_profiling (void) -{ - int save = _gmonparam.state; - _gmonparam.state = GMON_PROF_OFF; - if (save == GMON_PROF_ON) - write_gmon (); - _gmonparam.state = save; -} - - -void _mcleanup (void) -{ - moncontrol (0); - - if (_gmonparam.state != GMON_PROF_ERROR) - write_gmon (); - - /* free the memory. */ - if (_gmonparam.tos != NULL) - free (_gmonparam.tos); -} - -#ifndef SIGPROF - -/* Enable statistical profiling, writing samples of the PC into at most - SIZE bytes of SAMPLE_BUFFER; every processor clock tick while profiling - is enabled, the system examines the user PC and increments - SAMPLE_BUFFER[((PC - OFFSET) / 2) * SCALE / 65536]. If SCALE is zero, - disable profiling. Returns zero on success, -1 on error. */ - -int profil (u_short *sample_buffer, size_t size, size_t offset, u_int scale) -{ - if (scale == 0) - /* Disable profiling. */ - return 0; - - __set_errno (ENOSYS); - return -1; -} - -#else - -static u_short *samples; -static size_t nsamples; -static size_t pc_offset; -static u_int pc_scale; - -static inline void profil_count (void *pc) -{ - size_t i = (pc - pc_offset - (void *) 0) / 2; - - if (sizeof (unsigned long long int) > sizeof (size_t)) - i = (unsigned long long int) i * pc_scale / 65536; - else - i = i / 65536 * pc_scale + i % 65536 * pc_scale / 65536; - - if (i < nsamples) - ++samples[i]; -} - -/* Get the machine-dependent definition of `profil_counter', the signal - handler for SIGPROF. It calls `profil_count' (above) with the PC of the - interrupted code. */ -#include <bits/profil-counter.h> - -/* Enable statistical profiling, writing samples of the PC into at most - SIZE bytes of SAMPLE_BUFFER; every processor clock tick while profiling - is enabled, the system examines the user PC and increments - SAMPLE_BUFFER[((PC - OFFSET) / 2) * SCALE / 65536]. If SCALE is zero, - disable profiling. Returns zero on success, -1 on error. */ - -int profil (u_short *sample_buffer, size_t size, size_t offset, u_int scale) -{ - static struct sigaction oact; - static struct itimerval otimer; - struct sigaction act; - struct itimerval timer; - - if (sample_buffer == NULL) - { - /* Disable profiling. */ - if (samples == NULL) - /* Wasn't turned on. */ - return 0; - - if (setitimer (ITIMER_PROF, &otimer, NULL) < 0) - return -1; - samples = NULL; - return sigaction (SIGPROF, &oact, NULL); - } - - if (samples) - { - /* Was already turned on. Restore old timer and signal handler - first. */ - if (setitimer (ITIMER_PROF, &otimer, NULL) < 0 - || sigaction (SIGPROF, &oact, NULL) < 0) - return -1; - } - - samples = sample_buffer; - nsamples = size / sizeof *samples; - pc_offset = offset; - pc_scale = scale; - - act.sa_handler = (__sighandler_t) &profil_counter; - act.sa_flags = SA_RESTART; - __sigfillset (&act.sa_mask); - if (sigaction (SIGPROF, &act, &oact) < 0) - return -1; - - timer.it_value.tv_sec = 0; - timer.it_value.tv_usec = 1; - timer.it_interval = timer.it_value; - return setitimer (ITIMER_PROF, &timer, &otimer); -} - -#endif - - -/* This file provides the machine-dependent definitions of the _MCOUNT_DECL - and MCOUNT macros. */ -#include <bits/machine-gmon.h> -#include <bits/atomicity.h> - -/* - * mcount is called on entry to each function compiled with the profiling - * switch set. _mcount(), which is declared in a machine-dependent way - * with _MCOUNT_DECL, does the actual work and is either inlined into a - * C routine or called by an assembly stub. In any case, this magic is - * taken care of by the MCOUNT definition in <machine/profile.h>. - * - * _mcount updates data structures that represent traversals of the - * program's call graph edges. frompc and selfpc are the return - * address and function address that represents the given call graph edge. - * - * Note: the original BSD code used the same variable (frompcindex) for - * both frompcindex and frompc. Any reasonable, modern compiler will - * perform this optimization. - */ -_MCOUNT_DECL(frompc, selfpc) /* _mcount; may be static, inline, etc */ -{ - register ARCINDEX *frompcindex; - register struct tostruct *top, *prevtop; - register struct gmonparam *p; - register ARCINDEX toindex; - int i; - - p = &_gmonparam; - /* - * check that we are profiling - * and that we aren't recursively invoked. - */ - if (! compare_and_swap (&p->state, GMON_PROF_ON, GMON_PROF_BUSY)) - return; - - /* - * check that frompcindex is a reasonable pc value. - * for example: signal catchers get called from the stack, - * not from text space. too bad. - */ - frompc -= p->lowpc; - if (frompc > p->textsize) - goto done; - - /* The following test used to be - if (p->log_hashfraction >= 0) - But we can simplify this if we assume the profiling data - is always initialized by the functions in gmon.c. But - then it is possible to avoid a runtime check and use the - smae `if' as in gmon.c. So keep these tests in sync. */ - if ((HASHFRACTION & (HASHFRACTION - 1)) == 0) { - /* avoid integer divide if possible: */ - i = frompc >> p->log_hashfraction; - } else { - i = frompc / (p->hashfraction * sizeof(*p->froms)); - } - frompcindex = &p->froms[i]; - toindex = *frompcindex; - if (toindex == 0) { - /* - * first time traversing this arc - */ - toindex = ++p->tos[0].link; - if (toindex >= p->tolimit) - /* halt further profiling */ - goto overflow; - - *frompcindex = toindex; - top = &p->tos[toindex]; - top->selfpc = selfpc; - top->count = 1; - top->link = 0; - goto done; - } - top = &p->tos[toindex]; - if (top->selfpc == selfpc) { - /* - * arc at front of chain; usual case. - */ - top->count++; - goto done; - } - /* - * have to go looking down chain for it. - * top points to what we are looking at, - * prevtop points to previous top. - * we know it is not at the head of the chain. - */ - for (; /* goto done */; ) { - if (top->link == 0) { - /* - * top is end of the chain and none of the chain - * had top->selfpc == selfpc. - * so we allocate a new tostruct - * and link it to the head of the chain. - */ - toindex = ++p->tos[0].link; - if (toindex >= p->tolimit) - goto overflow; - - top = &p->tos[toindex]; - top->selfpc = selfpc; - top->count = 1; - top->link = *frompcindex; - *frompcindex = toindex; - goto done; - } - /* - * otherwise, check the next arc on the chain. - */ - prevtop = top; - top = &p->tos[top->link]; - if (top->selfpc == selfpc) { - /* - * there it is. - * increment its count - * move it to the head of the chain. - */ - top->count++; - toindex = prevtop->link; - prevtop->link = top->link; - top->link = *frompcindex; - *frompcindex = toindex; - goto done; - } - - } -done: - p->state = GMON_PROF_ON; - return; -overflow: - p->state = GMON_PROF_ERROR; - return; -} - -/* - * Actual definition of mcount function. Defined in <machine/profile.h>, - * which is included by <sys/gmon.h>. - */ -MCOUNT - -#endif - |