Index: logger.c
===================================================================
RCS file: /usr/cvsroot/asterisk/logger.c,v
retrieving revision 1.90
diff -u -r1.90 logger.c
--- logger.c	30 Nov 2005 08:49:59 -0000	1.90
+++ logger.c	1 Dec 2005 20:19:41 -0000
@@ -32,6 +32,9 @@
 #include <stdlib.h>
 #include <errno.h>
 #include <sys/stat.h>
+#ifdef STACK_BACKTRACES
+#include <execinfo.h>
+#endif
 
 #define SYSLOG_NAMES /* so we can map syslog facilities names to their numeric values,
 		        from <syslog.h> which is included by logger.h */
@@ -816,6 +819,39 @@
 	}
 }
 
+void ast_backtrace(void)
+{
+#ifdef STACK_BACKTRACES
+	int count=0, i=0;
+	void **addresses;
+	char **strings;
+
+	addresses = calloc(levels, sizeof(void *));
+	if (addresses) {
+		count = backtrace(addresses, 20);
+		strings = backtrace_symbols(addresses, count);
+		if (strings) {
+			ast_log(LOG_WARNING, "Got %d backtrace record%c\n", count, count != 1 ? 's' : ' ');
+			for (i=0; i < count ; i++) {
+				ast_log(LOG_WARNING, "#%d: [%08X] %s\n", i, (unsigned int)addresses[i], strings[i]);
+			}
+			free(strings);
+		} else {
+			ast_log(LOG_WARNING, "Could not allocate memory for backtrace\n");
+		}
+		free(addresses);
+	} else {
+		ast_log(LOG_WARNING, "Could not allocate memory for backtrace\n");
+	}
+#else
+#ifdef Linux
+	ast_log(LOG_WARNING, "Must compile with 'make dont-optimize' for stack backtraces\n");
+#else
+	ast_log(LOG_WARNING, "Inline stack backtraces are only available on the Linux platform.\n");
+#endif
+#endif
+}
+
 void ast_verbose(const char *fmt, ...)
 {
 	static char stuff[4096];
Index: Makefile
===================================================================
RCS file: /usr/cvsroot/asterisk/Makefile,v
retrieving revision 1.233
diff -u -r1.233 Makefile
--- Makefile	30 Nov 2005 08:49:58 -0000	1.233
+++ Makefile	1 Dec 2005 20:19:41 -0000
@@ -45,6 +45,11 @@
 
 #Tell gcc to optimize the code
 OPTIMIZE+=-O6
+else
+  # Stack backtraces, while useful for debugging, are incompatible with optimizations
+  ifeq (${OSARCH},Linux)
+    CFLAGS+=-DSTACK_BACKTRACES
+  endif
 endif
 
 #Overwite config files on "make samples"
Index: include/asterisk/logger.h
===================================================================
RCS file: /usr/cvsroot/asterisk/include/asterisk/logger.h,v
retrieving revision 1.15
diff -u -r1.15 logger.h
--- include/asterisk/logger.h	8 Sep 2005 02:19:02 -0000	1.15
+++ include/asterisk/logger.h	1 Dec 2005 20:19:41 -0000
@@ -56,6 +56,8 @@
 extern void ast_log(int level, const char *file, int line, const char *function, const char *fmt, ...)
 	__attribute__ ((format (printf, 5, 6)));
 
+extern void ast_backtrace(void);
+
 extern void ast_queue_log(const char *queuename, const char *callid, const char *agent, const char *event, const char *fmt, ...)
 	__attribute__ ((format (printf, 5, 6)));