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authorUlrich Drepper <drepper@redhat.com>2009-06-15 16:17:09 -0700
committerUlrich Drepper <drepper@redhat.com>2009-06-15 16:17:09 -0700
commit48dcd0ba84c5a0fa08a0bd000b24af07d20dce44 (patch)
tree846d0d74f1e00584a5973bb3eec4ee414314f436 /assert
parent6355c99740c91ed5a7fa14e378f74950e09f5f48 (diff)
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Preserve message printed before abort.
The terminal output etc is not visible in a core file.  The new
libc-internal variable __abort_msg will point to a string with the
message which has been printed before the abort in case abort is
called from inside libc.  BZ #10217
Diffstat (limited to 'assert')
-rw-r--r--assert/assert-perr.c10
-rw-r--r--assert/assert.c11
2 files changed, 13 insertions, 8 deletions
diff --git a/assert/assert-perr.c b/assert/assert-perr.c
index dd54246360..f239fab86b 100644
--- a/assert/assert-perr.c
+++ b/assert/assert-perr.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1994-1998,2001,2002,2005 Free Software Foundation, Inc.
+/* Copyright (C) 1994-1998,2001,2002,2005,2009 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -17,6 +17,7 @@
    02111-1307 USA.  */
 
 #include <assert.h>
+#include <atomic.h>
 #include <libintl.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -64,9 +65,10 @@ __assert_perror_fail (int errnum,
       (void) __fxprintf (NULL, "%s", buf);
       (void) fflush (stderr);
 
-      /* We have to free the buffer since the appplication might catch the
-	 SIGABRT.  */
-      free (buf);
+      /* We have to free the old buffer since the application might
+	 catch the SIGABRT signal.  */
+      char *old = atomic_exchange_acq (&__abort_msg, buf);
+      free (old);
     }
   else
     {
diff --git a/assert/assert.c b/assert/assert.c
index 0ef4ca62e4..727fb1446c 100644
--- a/assert/assert.c
+++ b/assert/assert.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991,1994-1996,1998,2001,2002,2005
+/* Copyright (C) 1991,1994-1996,1998,2001,2002,2005,2009
    Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
@@ -18,6 +18,7 @@
    02111-1307 USA.  */
 
 #include <assert.h>
+#include <atomic.h>
 #include <libintl.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -43,6 +44,7 @@ extern const char *__progname;
 # include FATAL_PREPARE_INCLUDE
 #endif
 
+
 #undef __assert_fail
 void
 __assert_fail (const char *assertion, const char *file, unsigned int line,
@@ -64,9 +66,10 @@ __assert_fail (const char *assertion, const char *file, unsigned int line,
       (void) __fxprintf (NULL, "%s", buf);
       (void) fflush (stderr);
 
-      /* We have to free the buffer since the application might catch the
-	 SIGABRT.  */
-      free (buf);
+      /* We have to free the old buffer since the application might
+	 catch the SIGABRT signal.  */
+      char *old = atomic_exchange_acq (&__abort_msg, buf);
+      free (old);
     }
   else
     {