(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

1 files changed, 91 insertions, 0 deletions

diff --git a/linuxthreads_db/td_ta_map_lwp2thr.c b/linuxthreads_db/td_ta_map_lwp2thr.c
new file mode 100644
index 0000000000..dd2fcbfe4e
--- /dev/null
+++ b/linuxthreads_db/td_ta_map_lwp2thr.c
@@ -0,0 +1,91 @@
+/* Which thread is running on an lwp?
+   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_ta_map_lwp2thr (const td_thragent_t *ta, lwpid_t lwpid, td_thrhandle_t *th)
+{
+  int pthread_threads_max = ta->pthread_threads_max;
+  size_t sizeof_descr = ta->sizeof_descr;
+  struct pthread_handle_struct phc[pthread_threads_max];
+  size_t cnt;
+#ifdef ALL_THREADS_STOPPED
+  int num;
+#else
+# define num 1
+#endif
+
+  LOG ("td_ta_map_lwp2thr");
+
+  /* Test whether the TA parameter is ok.  */
+  if (! ta_ok (ta))
+    return TD_BADTA;
+
+  /* Read all the descriptors.  */
+  if (ps_pdread (ta->ph, ta->handles, phc,
+		 sizeof (struct pthread_handle_struct) * pthread_threads_max)
+      != 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
+
+  /* Get the entries one after the other and find out whether the ID
+     matches.  */
+  for (cnt = 0; cnt < pthread_threads_max && num > 0; ++cnt)
+    if (phc[cnt].h_descr != NULL)
+      {
+	struct _pthread_descr_struct pds;
+
+#ifdef ALL_THREADS_STOPPED
+	/* First count this active thread.  */
+	--num;
+#endif
+
+	if (ps_pdread (ta->ph, phc[cnt].h_descr, &pds, sizeof_descr) != PS_OK)
+	  return TD_ERR;	/* XXX Other error value?  */
+
+	if ((pds.p_pid ?: ps_getpid (ta->ph)) == lwpid)
+	  {
+	    /* Found it.  Now fill in the `td_thrhandle_t' object.  */
+	    th->th_ta_p = (td_thragent_t *) ta;
+	    th->th_unique = phc[cnt].h_descr;
+
+	    return TD_OK;
+	  }
+      }
+    else if (cnt == 0)
+      {
+	/* The initial thread always exists.  But it might not yet be
+	   initialized.  Construct a value.  */
+	th->th_ta_p = (td_thragent_t *) ta;
+	th->th_unique = NULL;
+
+	return TD_OK;
+      }
+
+  return TD_NOLWP;
+}