2005-12-13 Ulrich Drepper <drepper@redhat.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/debug/backtracesyms.c b/debug/backtracesyms.c
new file mode 100644
index 0000000..db7ba36
--- /dev/null
+++ b/debug/backtracesyms.c
@@ -0,0 +1,58 @@
+/* Return list with names for address in backtrace.
+   Copyright (C) 1998, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+   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 <execinfo.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+/* Assume the worst for the width of an address.  */
+#define WORD_WIDTH 16
+
+
+char **
+__backtrace_symbols (array, size)
+     void *const *array;
+     int size;
+{
+  int cnt;
+  size_t total = 0;
+  char **result;
+
+  /* We can compute the text size needed for the symbols since we print
+     them all as "[+0x<addr>]".  */
+  total = size * (WORD_WIDTH + 6);
+
+  /* Allocate memory for the result.  */
+  result = malloc (size * sizeof (char *) + total);
+  if (result != NULL)
+    {
+      char *last = (char *) (result + size);
+
+      for (cnt = 0; cnt < size; ++cnt)
+	{
+	  result[cnt] = last;
+	  last += 1 + sprintf (last, "[+%p]", array[cnt]);
+	}
+    }
+
+  return result;
+}
+weak_alias (__backtrace_symbols, backtrace_symbols)