Add support for simple glibc based backtrace

1 files changed, 51 insertions, 0 deletions

diff --git a/src/log.c b/src/log.c
index 25ccd12f..51d1b0d0 100644
--- a/src/log.c
+++ b/src/log.c
@@ -23,8 +23,12 @@
 #include <config.h>
 #endif
 
+#define _GNU_SOURCE
 #include <stdarg.h>
 #include <syslog.h>
+#include <stdlib.h>
+#include <execinfo.h>
+#include <dlfcn.h>
 
 #include "ofono.h"
 
@@ -103,6 +107,49 @@ void ofono_debug(const char *format, ...)
 	va_end(ap);
 }
 
+static void signal_handler(int signo)
+{
+	void *frames[64];
+	char **symbols;
+	size_t n_ptrs;
+	unsigned int i;
+
+	n_ptrs = backtrace(frames, G_N_ELEMENTS(frames));
+	symbols = backtrace_symbols(frames, n_ptrs);
+	if (symbols == NULL) {
+		ofono_error("No backtrace symbols");
+		exit(1);
+	}
+
+	ofono_error("Aborting (signal %d)", signo);
+	ofono_error("++++++++ backtrace ++++++++");
+
+	for (i = 1; i < n_ptrs; i++)
+		ofono_error("[%d]: %s", i - 1, symbols[i]);
+
+	ofono_error("+++++++++++++++++++++++++++");
+
+	g_free(symbols);
+	exit(1);
+}
+
+static void signal_setup(sighandler_t handler)
+{
+	struct sigaction sa;
+	sigset_t mask;
+
+	sigemptyset(&mask);
+	sa.sa_handler = handler;
+	sa.sa_mask = mask;
+	sa.sa_flags = 0;
+	sigaction(SIGBUS, &sa, NULL);
+	sigaction(SIGILL, &sa, NULL);
+	sigaction(SIGFPE, &sa, NULL);
+	sigaction(SIGSEGV, &sa, NULL);
+	sigaction(SIGABRT, &sa, NULL);
+	sigaction(SIGPIPE, &sa, NULL);
+}
+
 extern struct ofono_debug_desc __start___debug[];
 extern struct ofono_debug_desc __stop___debug[];
 
@@ -152,6 +199,8 @@ int __ofono_log_init(const char *debug, ofono_bool_t detach)
 	if (detach == FALSE)
 		option |= LOG_PERROR;
 
+	signal_setup(signal_handler);
+
 	openlog("ofonod", option, LOG_DAEMON);
 
 	syslog(LOG_INFO, "oFono version %s", VERSION);
@@ -165,5 +214,7 @@ void __ofono_log_cleanup(void)
 
 	closelog();
 
+	signal_setup(SIG_DFL);
+
 	g_strfreev(enabled);
 }