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authorUlrich Drepper <drepper@redhat.com>2009-07-30 16:53:52 -0700
committerUlrich Drepper <drepper@redhat.com>2009-07-30 16:53:52 -0700
commit2dec6007d183aa51abedbbb048382973129f3935 (patch)
tree774535810d618d76979a2852cc3bf59917dd7453 /sysdeps
parent78c4ef475d47a2289635f74b726f52defedb4651 (diff)
downloadglibc-2dec6007d183aa51abedbbb048382973129f3935.tar.gz
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Stop backtrace when we make no more progress.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/ia64/backtrace.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/sysdeps/ia64/backtrace.c b/sysdeps/ia64/backtrace.c
index 423fed80a8..5cefb86ae4 100644
--- a/sysdeps/ia64/backtrace.c
+++ b/sysdeps/ia64/backtrace.c
@@ -1,5 +1,5 @@
 /* Return backtrace of current program state.
-   Copyright (C) 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2005, 2007, 2009 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
 
@@ -61,7 +61,13 @@ backtrace_helper (struct _Unwind_Context *ctx, void *a)
   /* We are first called with address in the __backtrace function.
      Skip it.  */
   if (arg->cnt != -1)
-    arg->array[arg->cnt] = (void *) unwind_getip (ctx);
+    {
+      arg->array[arg->cnt] = (void *) unwind_getip (ctx);
+
+      /* Check whether we make any progress.  */
+      if (arg->cnt > 0 && arg->array[arg->cnt - 1] == arg->array[arg->cnt])
+	return _URC_END_OF_STACK;
+    }
   if (++arg->cnt == arg->size)
     return _URC_END_OF_STACK;
   return _URC_NO_REASON;