import new linuxthreads_db from glibc HEAD

1 files changed, 70 insertions, 0 deletions

diff --git a/libpthread/linuxthreads_db/td_thr_validate.c b/libpthread/linuxthreads_db/td_thr_validate.c
new file mode 100644
index 000000000..6f893d3f7
--- /dev/null
+++ b/libpthread/linuxthreads_db/td_thr_validate.c
@@ -0,0 +1,70 @@
+/* Validate a thread handle.
+   Copyright (C) 1999, 2001, 2002 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 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 "thread_dbP.h"
+#include <linuxthreads/internals.h>
+
+
+td_err_e
+td_thr_validate (const td_thrhandle_t *th)
+{
+  struct pthread_handle_struct *handles = th->th_ta_p->handles;
+  int pthread_threads_max = th->th_ta_p->pthread_threads_max;
+  int cnt;
+  struct pthread_handle_struct phc;
+
+  LOG ("td_thr_validate");
+
+  /* A special case: if the program just starts up the handle is
+     NULL.  */
+  if (th->th_unique == NULL)
+    {
+      /* Read the first handle.  If the pointer to the thread
+	 descriptor is not NULL this is an error.  */
+      if (ps_pdread (th->th_ta_p->ph, handles, &phc,
+		     sizeof (struct pthread_handle_struct)) != PS_OK)
+	return TD_ERR;	/* XXX Other error value?  */
+
+      return phc.h_descr == NULL ? TD_OK : TD_NOTHR;
+    }
+
+  /* Now get all descriptors, one after the other.  */
+  for (cnt = 0; cnt < pthread_threads_max; ++cnt, ++handles)
+    {
+      if (ps_pdread (th->th_ta_p->ph, handles, &phc,
+		     sizeof (struct pthread_handle_struct)) != PS_OK)
+	return TD_ERR;	/* XXX Other error value?  */
+
+      if (phc.h_descr != NULL && phc.h_descr == th->th_unique)
+	{
+	  struct _pthread_descr_struct pds;
+
+	  if (ps_pdread (th->th_ta_p->ph, phc.h_descr, &pds,
+			 th->th_ta_p->sizeof_descr) != PS_OK)
+	    return TD_ERR;	/* XXX Other error value?  */
+
+	  /* XXX There should be another test using the TID but this is
+	     currently not available.  */
+	  return pds.p_terminated != 0 ? TD_NOTHR : TD_OK;
+	}
+    }
+
+  return TD_ERR;
+}