Merge in the pthread library. This is the linuxthreads library taken from

glibc 2.1.3 and ported to work with uClibc by Stefan Soucek and Erik Andersen
(me).  Stefan has hacked things up such that linuxthreads runs on MMU-less
systems (tested only on arm-nommu).  Erik cleaned things up and made it work
properly as a shared library.
 -Erik

1 files changed, 143 insertions, 0 deletions

diff --git a/libpthread/linuxthreads_db/td_ta_thr_iter.c b/libpthread/linuxthreads_db/td_ta_thr_iter.c
new file mode 100644
index 000000000..f1223d113
--- /dev/null
+++ b/libpthread/linuxthreads_db/td_ta_thr_iter.c
@@ -0,0 +1,143 @@
+/* Iterate over a process's threads.
+   Copyright (C) 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <stdlib.h>
+#include "thread_dbP.h"
+
+
+static int
+handle_descr (const td_thragent_t *ta, td_thr_iter_f *callback,
+	      void *cbdata_p, td_thr_state_e state, int ti_pri,
+	      size_t cnt, pthread_descr descr)
+{
+  struct _pthread_descr_struct pds;
+  size_t sizeof_descr = ta->sizeof_descr;
+  td_thrhandle_t th;
+
+  if (ps_pdread (ta->ph, descr, &pds, sizeof_descr) != PS_OK)
+    return TD_ERR;	/* XXX Other error value?  */
+
+  /* The manager thread must be handled special.  The descriptor
+     exists but the thread only gets created when the first
+     `pthread_create' call is issued.  A clear indication that this
+     happened is when the p_pid field is non-zero.  */
+  if (cnt == 1 && pds.p_pid == 0)
+    return TD_OK;
+
+  /* Now test whether this thread matches the specified
+     conditions.  */
+
+  /* Only if the priority level is as high or higher.  */
+  if (pds.p_priority < ti_pri)
+    return TD_OK;
+
+  /* Test the state.
+     XXX This is incomplete.  */
+  if (state != TD_THR_ANY_STATE)
+    return TD_OK;
+
+  /* XXX For now we ignore threads which are not running anymore.
+     The reason is that gdb tries to get the registers and fails.
+     In future we should have a special mode of the thread library
+     in which we keep the process around until the actual join
+     operation happened.  */
+  if (pds.p_exited != 0)
+    return TD_OK;
+
+  /* Yep, it matches.  Call the callback function.  */
+  th.th_ta_p = (td_thragent_t *) ta;
+  th.th_unique = descr;
+  if (callback (&th, cbdata_p) != 0)
+    return TD_DBERR;
+
+  /* All done successfully.  */
+  return TD_OK;
+}
+
+
+td_err_e
+td_ta_thr_iter (const td_thragent_t *ta, td_thr_iter_f *callback,
+		void *cbdata_p, td_thr_state_e state, int ti_pri,
+		sigset_t *ti_sigmask_p, unsigned int ti_user_flags)
+{
+  int pthread_threads_max;
+  struct pthread_handle_struct *phc;
+  td_err_e result = TD_OK;
+  int cnt;
+#ifdef ALL_THREADS_STOPPED
+  int num;
+#else
+# define num 1
+#endif
+
+  LOG (__FUNCTION__);
+
+  /* Test whether the TA parameter is ok.  */
+  if (! ta_ok (ta))
+    return TD_BADTA;
+
+  pthread_threads_max = ta->pthread_threads_max;
+  phc = (struct pthread_handle_struct *) alloca (sizeof (phc[0])
+						 * pthread_threads_max);
+
+  /* First read only the main thread and manager thread information.  */
+  if (ps_pdread (ta->ph, ta->handles, phc,
+		 sizeof (struct pthread_handle_struct) * 2) != PS_OK)
+    return TD_ERR;	/* XXX Other error value?  */
+
+  /* Now handle these descriptors.  */
+  result = handle_descr (ta, callback, cbdata_p, state, ti_pri, 0,
+			 phc[0].h_descr);
+  if (result != TD_OK)
+    return result;
+  result = handle_descr (ta, callback, cbdata_p, state, ti_pri, 1,
+			 phc[1].h_descr);
+  if (result != TD_OK)
+    return result;
+
+  /* Read all the descriptors.  */
+  if (ps_pdread (ta->ph, ta->handles + 2, &phc[2],
+		 (sizeof (struct pthread_handle_struct)
+		  * (pthread_threads_max - 2))) != PS_OK)
+    return TD_ERR;	/* XXX Other error value?  */
+
+#ifdef ALL_THREADS_STOPPED
+  /* Read the number of currently active threads.  */
+  if (ps_pdread (ta->ph, ta->pthread_handles_num, &num, sizeof (int)) != PS_OK)
+    return TD_ERR;	/* XXX Other error value?  */
+#endif
+
+  /* Now get all descriptors, one after the other.  */
+  for (cnt = 2; cnt < pthread_threads_max && num > 0; ++cnt)
+    if (phc[cnt].h_descr != NULL)
+      {
+#ifdef ALL_THREADS_STOPPED
+	/* First count this active thread.  */
+	--num;
+#endif
+
+	result = handle_descr (ta, callback, cbdata_p, state, ti_pri, cnt,
+			       phc[cnt].h_descr);
+	if (result != TD_OK)
+	  break;
+      }
+
+  return result;
+}