Paul Jakma:

lib/debug.{c,h}: glibc backtrace printing function (from the glibc info page)
configure.ac: check for glibc backtrace and set define
lib/zebra.h: glibc backtrace support

configure.ac

@@ -856,6 +856,18 @@ AC_TRY_COMPILE([#include <sys/resource.h>
  AC_DEFINE(HAVE_RUSAGE,,rusage)],
  AC_MSG_RESULT(no))
 
+dnl ---------------------------
+dnl check for glibc 'backtrace'
+dnl --------------------------- 
+if test "${glibc}" = "yes"; then
+   AC_CHECK_HEADER(execinfo.h)
+fi
+if test x"${ac_cv_header_execinfo_h}" = x"yes"; then
+  AC_CHECK_FUNC(backtrace,
+    [AC_DEFINE(HAVE_GLIBC_BACKTRACE,,Glibc backtrace)]
+  )
+fi
+
 dnl -------------
 dnl check version
 dnl -------------

configure.in

@@ -856,6 +856,18 @@ AC_TRY_COMPILE([#include <sys/resource.h>
  AC_DEFINE(HAVE_RUSAGE,,rusage)],
  AC_MSG_RESULT(no))
 
+dnl ---------------------------
+dnl check for glibc 'backtrace'
+dnl --------------------------- 
+if test "${glibc}" = "yes"; then
+   AC_CHECK_HEADER(execinfo.h)
+fi
+if test x"${ac_cv_header_execinfo_h}" = x"yes"; then
+  AC_CHECK_FUNC(backtrace,
+    [AC_DEFINE(HAVE_GLIBC_BACKTRACE,,Glibc backtrace)]
+  )
+fi
+
 dnl -------------
 dnl check version
 dnl -------------

lib/debug.c

@@ -0,0 +1,23 @@
+#include <zebra.h>
+#include "log.h"
+
+void 
+debug_print_trace (int signal)
+{
+    void *array[10];
+    size_t size;
+    char **strings;   
+    size_t i;
+
+    size = backtrace (array, 10);
+    strings = backtrace_symbols (array, size);
+
+    printf ("Obtained %zd stack frames.\n", size);
+
+    for (i = 0; i < size; i++)
+      printf ("%s\n", strings[i]);
+
+    free (strings);
+    
+    exit(1);
+}

lib/debug.h

@@ -0,0 +1,3 @@
+
+void debug_print_trace (int);
+

lib/zebra.h

@@ -172,6 +172,10 @@ typedef int socklen_t;
 #include <libutil.h>
 #endif /* HAVE_LIBUTIL_H */
 
+#ifdef HAVE_GLIBC_BACKTRACE
+#include <execinfo.h>
+#endif /* HAVE_GLIBC_BACKTRACE */
+
 #ifdef BSDI_NRL
 
 #ifdef HAVE_NETINET6_IN6_H