2.5-18.1

1 files changed, 29 insertions, 3 deletions

diff --git a/sysdeps/unix/sysv/linux/libc_fatal.c b/sysdeps/unix/sysv/linux/libc_fatal.c
index a79cfbabb9..c7fac6ab51 100644
--- a/sysdeps/unix/sysv/linux/libc_fatal.c
+++ b/sysdeps/unix/sysv/linux/libc_fatal.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1993-1995,1997,2000,2002-2004 Free Software Foundation, Inc.
+/* Copyright (C) 1993-1995,1997,2000,2002-2005 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
@@ -27,6 +27,7 @@
 #include <sysdep.h>
 #include <unistd.h>
 #include <sys/syslog.h>
+#include <execinfo.h>
 
 /* Abort with an error message.  */
 #include <not-cancel.h>
@@ -141,8 +142,33 @@ __libc_message (int do_abort, const char *fmt, ...)
   va_end (ap_copy);
 
   if (do_abort)
-    /* Terminate the process.  */
-    abort ();
+    {
+      if (do_abort > 1 && written)
+	{
+	  void *addrs[64];
+#define naddrs (sizeof (addrs) / sizeof (addrs[0]))
+	  int n = __backtrace (addrs, naddrs);
+	  if (n > 2)
+	    {
+#define strnsize(str) str, strlen (str)
+#define writestr(str) write_not_cancel (fd, str)
+	      writestr (strnsize ("======= Backtrace: =========\n"));
+	      __backtrace_symbols_fd (addrs + 1, n - 1, fd);
+
+	      writestr (strnsize ("======= Memory map: ========\n"));
+	      int fd2 = open_not_cancel_2 ("/proc/self/maps", O_RDONLY);
+	      char buf[1024];
+	      ssize_t n2;
+	      while ((n2 = read_not_cancel (fd2, buf, sizeof (buf))) > 0)
+		if (write_not_cancel (fd, buf, n2) != n2)
+		  break;
+	      close_not_cancel_no_status (fd2);
+	    }
+	}
+
+      /* Terminate the process.  */
+      abort ();
+    }
 }