From 81aade769a17e5b5ecfbdd7d57a30e67d78a15d3 Mon Sep 17 00:00:00 2001
From: Nigel Horne <njh@clamav.net>
Date: Tue, 22 Jun 2004 09:36:28 +0000
Subject: [PATCH] Added backtrace

git-svn: trunk@625
---
 clamav-devel/test/mbox/debugm.c | 49 +++++++++++++++++++++++++++++++--
 1 file changed, 47 insertions(+), 2 deletions(-)

diff --git a/clamav-devel/test/mbox/debugm.c b/clamav-devel/test/mbox/debugm.c
index a220a4697..a37454361 100644
--- a/clamav-devel/test/mbox/debugm.c
+++ b/clamav-devel/test/mbox/debugm.c
@@ -1,5 +1,7 @@
 /*
- * $CC $CFLAGS debugm.c -lclamav -lefence (or what ever memory debugger)
+ * $CC $CFLAGS -I../.. debugm.c -lclamav -lefence (or what ever memory debugger)
+ * If you're going to use HAVE_BACKTRACE, ensure CFLAGS includes -g and doesn't
+ * include -fomit-frame-pointer
  *
  * njh@bandsman.co.uk
  */
@@ -11,6 +13,48 @@
 #include <malloc.h>
 #include <clamav.h>
 #include <sys/resource.h>
+#include <signal.h>
+#include <features.h>
+#include "clamav-config.h"
+
+#if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 1
+/*#define HAVE_BACKTRACE	/* Only tested on Linux... */
+#endif
+
+#ifdef HAVE_BACKTRACE
+#include <execinfo.h>
+#endif
+
+static	void	print_trace(void);
+static	void	sigsegv(int sig);
+
+static void
+sigsegv(int sig)
+{
+	signal(SIGSEGV, SIG_DFL);
+	print_trace();
+	_exit(SIGSEGV);
+}
+
+static void
+print_trace(void)
+{
+#ifdef HAVE_BACKTRACE
+	void *array[10];
+	size_t size, i;
+	char **strings;
+
+	puts("Segfault caught, backtrace:");
+
+	size = backtrace(array, 10);
+	strings = backtrace_symbols(array, size);
+
+	for(i = 0; i < size; i++)
+		printf("\t%s\n", strings[i]);
+
+	free(strings);
+#endif
+}
 
 int
 main(int argc, char **argv)
@@ -29,6 +73,7 @@ main(int argc, char **argv)
 		perror("/tmp/mboxtest");
 		return errno;
 	}
+	signal(SIGSEGV, sigsegv);
 	while(*++argv) {
 		int fd = open(*argv, 0);
 
@@ -42,5 +87,5 @@ main(int argc, char **argv)
 	}
 	puts("Finished - don't forget to rm -rf /tmp/mboxtest");
 
-	exit(0);
+	return 0;
 }