Make exception messages more verbose.

configure.ac

@@ -64,6 +64,7 @@ AC_CHECK_LIB(m, floor)
 AC_CHECK_LIB(socket, getsockname)
 AC_CHECK_LIB(ws2_32, getsockname)
 AC_CHECK_LIB(shlwapi, PathRemoveFileSpecA)
+AC_CHECK_FUNCS([backtrace_symbols])
 
 AC_CONFIG_FILES([
 Makefile

icinga-app/Makefile.am

@@ -21,7 +21,8 @@ icinga2_CPPFLAGS = \
 	-DICINGA_LIBDIR="\"$(pkglibdir)\""
 
 icinga2_LDFLAGS = \
-	$(BOOST_LDFLAGS)
+	$(BOOST_LDFLAGS) \
+	-export-dynamic
 
 icinga2_LDADD = \
 	$(LIBLTDL) \

icinga-app/icinga.cpp

@@ -18,6 +18,7 @@
  ******************************************************************************/
 
 #include <i2-icinga.h>
+#include <execinfo.h>
 
 #ifndef _WIN32
 #	include "icinga-version.h"
@@ -28,6 +29,65 @@
 
 using namespace icinga;
 
+/**
+ * Handler for unhandled exceptions.
+ *
+ */
+static void exception_handler(void)
+{
+	static bool rethrow = true;
+
+	try {
+		rethrow = false;
+		throw;
+	} catch (const std::exception& ex) {
+		std::cerr << std::endl;
+		std::cerr << "Unhandled exception of type "
+			  << Utility::GetTypeName(typeid(ex))
+			  << std::endl;
+		std::cerr << "Diagnostic Information: "
+			  << ex.what()
+			  << std::endl;
+	}
+
+#ifdef HAVE_BACKTRACE_SYMBOLS
+	void *frames[50];
+	int framecount = backtrace(frames, sizeof(frames) / sizeof(frames[0]));
+
+	char **messages = backtrace_symbols(frames, framecount);
+
+	std::cerr << std::endl << "Stacktrace:" << std::endl;
+
+	for (int i = 0; i < framecount && messages != NULL; ++i) {
+		String message = messages[i];
+
+		char *sym_begin = strchr(messages[i], '(');
+
+		if (sym_begin != NULL) {
+			char *sym_end = strchr(sym_begin, '+');
+
+			if (sym_end != NULL) {
+				String sym = String(sym_begin + 1, sym_end);
+				String sym_demangled = Utility::DemangleSymbolName(sym);
+
+				if (sym_demangled.IsEmpty())
+					sym_demangled = "<unknown function>";
+
+				message = String(messages[i], sym_begin) + ": " + sym_demangled + " (" + String(sym_end);
+			}
+		}
+
+        	std::cerr << "\t(" << i << ") " << message << std::endl;
+	}
+
+	free(messages);
+
+	std::cerr << std::endl;
+#endif /* HAVE_BACKTRACE_SYMBOLS */
+
+	abort();
+}
+
 /**
  * Entry point for the Icinga application.
  *
@@ -37,6 +97,8 @@ using namespace icinga;
  */
 int main(int argc, char **argv)
 {
+	std::set_terminate(exception_handler);
+
 #ifndef _WIN32
 	LTDL_SET_PRELOADED_SYMBOLS();
 #endif /* _WIN32 */

lib/base/application.cpp

@@ -338,19 +338,7 @@ int Application::Run(int argc, char **argv)
 
 	DynamicObject::BeginTx();
 
-	if (IsDebugging()) {
-		result = Main(m_Arguments);
-	} else {
-		try {
-			result = Main(m_Arguments);
-		} catch (const exception& ex) {
-			Logger::Write(LogCritical, "base", "---");
-			Logger::Write(LogCritical, "base", "Exception: " + Utility::GetTypeName(typeid(ex)));
-			Logger::Write(LogCritical, "base", "Message: " + String(ex.what()));
-
-			result = EXIT_FAILURE;
-		}
-	}
+	result = Main(m_Arguments);
 
 	DynamicObject::FinishTx();
 	DynamicObject::DeactivateObjects();

lib/base/utility.cpp

@@ -24,6 +24,29 @@ using namespace icinga;
 
 bool I2_EXPORT Utility::m_SSLInitialized = false;
 
+/**
+ * Demangles a symbol name.
+ *
+ * @param sym The symbol name.
+ * @returns A human-readable version of the symbol name.
+ */
+String Utility::DemangleSymbolName(const String& sym)
+{
+	String result = sym;
+
+#ifdef HAVE_GCC_ABI_DEMANGLE
+	int status;
+	char *realname = abi::__cxa_demangle(sym.CStr(), 0, 0, &status);
+
+	if (realname != NULL) {
+		result = String(realname);
+		free(realname);
+	}
+#endif /* HAVE_GCC_ABI_DEMANGLE */
+
+	return result;
+}
+
 /**
  * Returns a human-readable type name of a type_info object.
  *
@@ -32,22 +55,9 @@ bool I2_EXPORT Utility::m_SSLInitialized = false;
  */
 String Utility::GetTypeName(const type_info& ti)
 {
-	String klass = ti.name();
-
-#ifdef HAVE_GCC_ABI_DEMANGLE
-	int status;
-	char *realname = abi::__cxa_demangle(klass.CStr(), 0, 0, &status);
-
-	if (realname != NULL) {
-		klass = String(realname);
-		free(realname);
-	}
-#endif /* HAVE_GCC_ABI_DEMANGLE */
-
-	return klass;
+	return DemangleSymbolName(ti.name());
 }
 
-
 /**
  * Detaches from the controlling terminal.
  */

lib/base/utility.h

@@ -31,6 +31,7 @@ namespace icinga
 class I2_BASE_API Utility
 {
 public:
+	static String DemangleSymbolName(const String& sym);
 	static String GetTypeName(const type_info& ti);
 
 	static void Daemonize(void);