[core] convert all assert() to LI_FORCE_ASSERT(), and support writing backtraces on fatal errors with libunwind

configure.ac

@@ -268,6 +268,18 @@ if test "ac_cv_sockaddr_storage_support" = yes; then
 fi
 
 
+dnl Checking for libunwind
+AC_MSG_CHECKING(for libunwind)
+AC_ARG_WITH(libunwind,
+    AC_HELP_STRING([--with-libunwind],[Include libunwind support for backtraces on assert failures]),
+    [WITH_LIBUNWIND=$withval],[WITH_LIBUNWIND=no])
+
+if test "$WITH_LIBUNWIND" != "no"; then
+  PKG_CHECK_MODULES(LIBUNWIND, libunwind)
+  AC_DEFINE(HAVE_LIBUNWIND, 1, [Have libunwind support])
+fi
+
+
 dnl Check for openssl
 AC_MSG_CHECKING([for OpenSSL])
 AC_ARG_WITH([openssl],

include/lighttpd/actions.h

@@ -93,7 +93,7 @@ LI_API liAction* li_action_new_list(void);
 LI_API liAction* li_action_new_condition(liCondition *cond, liAction *target, liAction *target_else);
 LI_API liAction* li_action_new_balancer(liBackendSelectCB bselect, liBackendFallbackCB bfallback, liBackendFinishedCB bfinished, liBalancerFreeCB bfree, gpointer param, gboolean provide_backlog);
 
-/* assert(list->refcount == 1)! converts list to a list in place if necessary */
+/* LI_FORCE_ASSERT(list->refcount == 1)! converts list to a list in place if necessary */
 LI_API void li_action_append_inplace(liAction *list, liAction *element);
 
 #endif

include/lighttpd/angel_log.h

@@ -5,13 +5,11 @@
 #error Please include <lighttpd/angel_base.h> instead of this file
 #endif
 
-/* #include <lighttpd/valgrind/valgrind.h> */
-
 #define SEGFAULT(srv, fmt, ...) \
 	do { \
-		li_log_write_(srv, LI_LOG_LEVEL_ABORT, LI_LOG_FLAG_TIMESTAMP, "(crashing) %s.%d: "fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__); \
-		/* VALGRIND_PRINTF_BACKTRACE(fmt, __VA_ARGS__); */\
-		abort();\
+		li_log_write_(srv, LI_LOG_LEVEL_ABORT, LI_LOG_FLAG_TIMESTAMP, "(crashing) %s:%d: "fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__); \
+		li_print_backtrace_stderr(); \
+		abort(); \
 	} while(0)
 
 #define ERROR(srv, fmt, ...) \

include/lighttpd/core_lua.h

@@ -114,7 +114,7 @@ INLINE void li_lua_lock(liLuaState *LL) {
 	gboolean b;
 	g_static_rec_mutex_lock(&LL->lualock);
 	b = lua_checkstack(LL->L, LUA_MINSTACK);
-	assert(b);
+	LI_FORCE_ASSERT(b);
 }
 
 INLINE void li_lua_unlock(liLuaState *LL) {

include/lighttpd/events.h

@@ -201,8 +201,8 @@ INLINE li_tstamp li_event_time(void) {
 }
 
 INLINE void li_event_attach_(liEventLoop *loop, liEventBase *base) {
-	assert(NULL == base->link_watchers.data);
-	assert(NULL != loop);
+	LI_FORCE_ASSERT(NULL == base->link_watchers.data);
+	LI_FORCE_ASSERT(NULL != loop);
 
 	base->link_watchers.data = loop;
 	g_queue_push_tail_link(&loop->watchers, &base->link_watchers);
@@ -238,8 +238,8 @@ INLINE liEventLoop* li_event_get_loop_(liEventBase *base) {
 INLINE void li_event_start_(liEventBase *base) {
 	liEventLoop *loop = base->link_watchers.data;
 
-	assert(NULL != base->callback);
-	assert(LI_EVT_NONE != base->type);
+	LI_FORCE_ASSERT(NULL != base->callback);
+	LI_FORCE_ASSERT(LI_EVT_NONE != base->type);
 
 	if (base->active) return;
 	base->active = 1;
@@ -251,8 +251,8 @@ INLINE void li_event_start_(liEventBase *base) {
 		case LI_EVT_IO:
 			{
 				liEventIO *io = li_event_io_from(base);
-				assert(!ev_is_active(&io->libevmess.w));
-				assert(-1 != io->libevmess.io.fd);
+				LI_FORCE_ASSERT(!ev_is_active(&io->libevmess.w));
+				LI_FORCE_ASSERT(-1 != io->libevmess.io.fd);
 				ev_io_start(loop->loop, &io->libevmess.io);
 				if (!base->keep_loop_alive) ev_unref(loop->loop);
 			}
@@ -260,7 +260,7 @@ INLINE void li_event_start_(liEventBase *base) {
 		case LI_EVT_TIMER:
 			{
 				liEventTimer *timer = li_event_timer_from(base);
-				assert(!ev_is_active(&timer->libevmess.w));
+				LI_FORCE_ASSERT(!ev_is_active(&timer->libevmess.w));
 				if (0 >= timer->libevmess.timer.repeat) timer->libevmess.timer.repeat = 0.0001;
 				ev_timer_again(loop->loop, &timer->libevmess.timer);
 				if (!base->keep_loop_alive) ev_unref(loop->loop);
@@ -269,7 +269,7 @@ INLINE void li_event_start_(liEventBase *base) {
 		case LI_EVT_ASYNC:
 			{
 				liEventAsync *async = li_event_async_from(base);
-				assert(!ev_is_active(&async->libevmess.w));
+				LI_FORCE_ASSERT(!ev_is_active(&async->libevmess.w));
 				ev_async_start(loop->loop, &async->libevmess.async);
 				if (!base->keep_loop_alive) ev_unref(loop->loop);
 			}
@@ -277,7 +277,7 @@ INLINE void li_event_start_(liEventBase *base) {
 		case LI_EVT_CHILD:
 			{
 				liEventChild *child = li_event_child_from(base);
-				assert(!ev_is_active(&child->libevmess.w));
+				LI_FORCE_ASSERT(!ev_is_active(&child->libevmess.w));
 				ev_child_start(loop->loop, &child->libevmess.child);
 				if (!base->keep_loop_alive) ev_unref(loop->loop);
 			}
@@ -285,7 +285,7 @@ INLINE void li_event_start_(liEventBase *base) {
 		case LI_EVT_SIGNAL:
 			{
 				liEventSignal *sig = li_event_signal_from(base);
-				assert(!ev_is_active(&sig->libevmess.w));
+				LI_FORCE_ASSERT(!ev_is_active(&sig->libevmess.w));
 				ev_signal_start(loop->loop, &sig->libevmess.sig);
 				if (!base->keep_loop_alive) ev_unref(loop->loop);
 			}
@@ -293,7 +293,7 @@ INLINE void li_event_start_(liEventBase *base) {
 		case LI_EVT_PREPARE:
 			{
 				liEventPrepare *prepare = li_event_prepare_from(base);
-				assert(!ev_is_active(&prepare->libevmess.w));
+				LI_FORCE_ASSERT(!ev_is_active(&prepare->libevmess.w));
 				ev_prepare_start(loop->loop, &prepare->libevmess.prepare);
 				if (!base->keep_loop_alive) ev_unref(loop->loop);
 			}
@@ -301,7 +301,7 @@ INLINE void li_event_start_(liEventBase *base) {
 		case LI_EVT_CHECK:
 			{
 				liEventCheck *check = li_event_check_from(base);
-				assert(!ev_is_active(&check->libevmess.w));
+				LI_FORCE_ASSERT(!ev_is_active(&check->libevmess.w));
 				ev_check_start(loop->loop, &check->libevmess.check);
 				if (!base->keep_loop_alive) ev_unref(loop->loop);
 			}
@@ -316,8 +316,8 @@ INLINE void li_event_stop_(liEventBase *base) {
 	if (!base->active) return;
 	base->active = 0;
 
-	assert(NULL != base->callback);
-	assert(LI_EVT_NONE != base->type);
+	LI_FORCE_ASSERT(NULL != base->callback);
+	LI_FORCE_ASSERT(LI_EVT_NONE != base->type);
 
 	if (NULL != loop) {
 		switch (base->type) {
@@ -326,7 +326,7 @@ INLINE void li_event_stop_(liEventBase *base) {
 		case LI_EVT_IO:
 			{
 				liEventIO *io = li_event_io_from(base);
-				assert(ev_is_active(&io->libevmess.w));
+				LI_FORCE_ASSERT(ev_is_active(&io->libevmess.w));
 				if (!base->keep_loop_alive) ev_ref(loop->loop);
 				ev_io_stop(loop->loop, &io->libevmess.io);
 			}
@@ -334,7 +334,7 @@ INLINE void li_event_stop_(liEventBase *base) {
 		case LI_EVT_TIMER:
 			{
 				liEventTimer *timer = li_event_timer_from(base);
-				assert(ev_is_active(&timer->libevmess.w));
+				LI_FORCE_ASSERT(ev_is_active(&timer->libevmess.w));
 				if (!base->keep_loop_alive) ev_ref(loop->loop);
 				ev_timer_stop(loop->loop, &timer->libevmess.timer);
 			}
@@ -342,7 +342,7 @@ INLINE void li_event_stop_(liEventBase *base) {
 		case LI_EVT_ASYNC:
 			{
 				liEventAsync *async = li_event_async_from(base);
-				assert(ev_is_active(&async->libevmess.w));
+				LI_FORCE_ASSERT(ev_is_active(&async->libevmess.w));
 				if (!base->keep_loop_alive) ev_ref(loop->loop);
 				ev_async_stop(loop->loop, &async->libevmess.async);
 			}
@@ -350,7 +350,7 @@ INLINE void li_event_stop_(liEventBase *base) {
 		case LI_EVT_CHILD:
 			{
 				liEventChild *child = li_event_child_from(base);
-				assert(ev_is_active(&child->libevmess.w));
+				LI_FORCE_ASSERT(ev_is_active(&child->libevmess.w));
 				if (!base->keep_loop_alive) ev_ref(loop->loop);
 				ev_child_stop(loop->loop, &child->libevmess.child);
 			}
@@ -358,7 +358,7 @@ INLINE void li_event_stop_(liEventBase *base) {
 		case LI_EVT_SIGNAL:
 			{
 				liEventSignal *sig = li_event_signal_from(base);
-				assert(ev_is_active(&sig->libevmess.w));
+				LI_FORCE_ASSERT(ev_is_active(&sig->libevmess.w));
 				if (!base->keep_loop_alive) ev_ref(loop->loop);
 				ev_signal_stop(loop->loop, &sig->libevmess.sig);
 			}
@@ -366,7 +366,7 @@ INLINE void li_event_stop_(liEventBase *base) {
 		case LI_EVT_PREPARE:
 			{
 				liEventPrepare *prepare = li_event_prepare_from(base);
-				assert(ev_is_active(&prepare->libevmess.w));
+				LI_FORCE_ASSERT(ev_is_active(&prepare->libevmess.w));
 				if (!base->keep_loop_alive) ev_ref(loop->loop);
 				ev_prepare_stop(loop->loop, &prepare->libevmess.prepare);
 			}
@@ -374,7 +374,7 @@ INLINE void li_event_stop_(liEventBase *base) {
 		case LI_EVT_CHECK:
 			{
 				liEventCheck *check = li_event_check_from(base);
-				assert(ev_is_active(&check->libevmess.w));
+				LI_FORCE_ASSERT(ev_is_active(&check->libevmess.w));
 				if (!base->keep_loop_alive) ev_ref(loop->loop);
 				ev_check_stop(loop->loop, &check->libevmess.check);
 			}
@@ -473,7 +473,7 @@ INLINE int li_event_io_fd(liEventIO *io) {
 }
 
 INLINE liEventIO* li_event_io_from(liEventBase *base) {
-	assert(LI_EVT_IO == base->type);
+	LI_FORCE_ASSERT(LI_EVT_IO == base->type);
 	return LI_CONTAINER_OF(base, liEventIO, base);
 }
 
@@ -484,7 +484,7 @@ INLINE void li_event_timer_once(liEventTimer *timer, li_tstamp timeout) {
 }
 
 INLINE liEventTimer* li_event_timer_from(liEventBase *base) {
-	assert(LI_EVT_TIMER == base->type);
+	LI_FORCE_ASSERT(LI_EVT_TIMER == base->type);
 	return LI_CONTAINER_OF(base, liEventTimer, base);
 }
 
@@ -494,7 +494,7 @@ INLINE void li_event_async_send(liEventAsync *async) {
 }
 
 INLINE liEventAsync* li_event_async_from(liEventBase *base){
-	assert(LI_EVT_ASYNC == base->type);
+	LI_FORCE_ASSERT(LI_EVT_ASYNC == base->type);
 	return LI_CONTAINER_OF(base, liEventAsync, base);
 }
 
@@ -507,7 +507,7 @@ INLINE int li_event_child_status(liEventChild *child) {
 }
 
 INLINE liEventChild* li_event_child_from(liEventBase *base) {
-	assert(LI_EVT_CHILD == base->type);
+	LI_FORCE_ASSERT(LI_EVT_CHILD == base->type);
 	return LI_CONTAINER_OF(base, liEventChild, base);
 }
 
@@ -516,17 +516,17 @@ INLINE int li_event_signal_signum(liEventSignal *sig) {
 }
 
 INLINE liEventSignal* li_event_signal_from(liEventBase *base) {
-	assert(LI_EVT_SIGNAL == base->type);
+	LI_FORCE_ASSERT(LI_EVT_SIGNAL == base->type);
 	return LI_CONTAINER_OF(base, liEventSignal, base);
 }
 
 INLINE liEventPrepare* li_event_prepare_from(liEventBase *base) {
-	assert(LI_EVT_PREPARE == base->type);
+	LI_FORCE_ASSERT(LI_EVT_PREPARE == base->type);
 	return LI_CONTAINER_OF(base, liEventPrepare, base);
 }
 
 INLINE liEventCheck* li_event_check_from(liEventBase *base) {
-	assert(LI_EVT_CHECK == base->type);
+	LI_FORCE_ASSERT(LI_EVT_CHECK == base->type);
 	return LI_CONTAINER_OF(base, liEventCheck, base);
 }
 

include/lighttpd/log.h

@@ -16,27 +16,25 @@
  * Logs are sent once per event loop iteration to the logging thread in order to reduce syscalls and lock contention.
  */
 
-/* #include <lighttpd/valgrind/valgrind.h> */
-
 /* at least one of srv and wrk must not be NULL. log_map may be NULL. */
 #define _SEGFAULT(srv, wrk, log_map, fmt, ...) \
 	do { \
-		li_log_write(srv, NULL, NULL, LI_LOG_LEVEL_ABORT, LI_LOG_FLAG_TIMESTAMP, "(crashing) %s.%d: "fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__); \
-		/* VALGRIND_PRINTF_BACKTRACE(fmt, __VA_ARGS__); */\
-		abort();\
+		li_log_write(srv, NULL, NULL, LI_LOG_LEVEL_ABORT, LI_LOG_FLAG_TIMESTAMP, "(crashing) %s:%d: %s " fmt, LI_REMOVE_PATH(__FILE__), __LINE__, G_STRFUNC, __VA_ARGS__); \
+		li_print_backtrace_stderr(); \
+		abort(); \
 	} while(0)
 
 #define _ERROR(srv, wrk, ctx, fmt, ...) \
-	li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_ERROR, LI_LOG_FLAG_TIMESTAMP, "(error) %s.%d: "fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__)
+	li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_ERROR, LI_LOG_FLAG_TIMESTAMP, "(error) %s:%d: " fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__)
 
 #define _WARNING(srv, wrk, ctx, fmt, ...) \
-	li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_WARNING, LI_LOG_FLAG_TIMESTAMP, "(warning) %s.%d: "fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__)
+	li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_WARNING, LI_LOG_FLAG_TIMESTAMP, "(warning) %s:%d: " fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__)
 
 #define _INFO(srv, wrk, ctx, fmt, ...) \
-	li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_INFO, LI_LOG_FLAG_TIMESTAMP, "(info) %s.%d: "fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__)
+	li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_INFO, LI_LOG_FLAG_TIMESTAMP, "(info) %s:%d: " fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__)
 
 #define _DEBUG(srv, wrk, ctx, fmt, ...) \
-	li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_DEBUG, LI_LOG_FLAG_TIMESTAMP, "(debug) %s.%d: "fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__)
+	li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_DEBUG, LI_LOG_FLAG_TIMESTAMP, "(debug) %s:%d: " fmt, LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__)
 
 #define _BACKEND(srv, wrk, ctx, fmt, ...) \
 	li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_BACKEND, LI_LOG_FLAG_TIMESTAMP, fmt, __VA_ARGS__)
@@ -44,7 +42,7 @@
 	li_log_split_lines_(srv, wrk, ctx, LI_LOG_LEVEL_BACKEND, LI_LOG_FLAG_TIMESTAMP, txt, fmt, __VA_ARGS__)
 
 #define _GERROR(srv, wrk, ctx, error, fmt, ...) \
-	li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_ERROR, LI_LOG_FLAG_TIMESTAMP, "(error) %s.%d: " fmt "\n  %s", LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__, error ? error->message : "Empty GError")
+	li_log_write(srv, wrk, ctx, LI_LOG_LEVEL_ERROR, LI_LOG_FLAG_TIMESTAMP, "(error) %s:%d: " fmt "\n  %s", LI_REMOVE_PATH(__FILE__), __LINE__, __VA_ARGS__, error ? error->message : "Empty GError")
 
 #define VR_SEGFAULT(vr, fmt, ...) _SEGFAULT(vr->wrk->srv, vr->wrk, &vr->log_context, fmt, __VA_ARGS__)
 #define VR_ERROR(vr, fmt, ...)    _ERROR(vr->wrk->srv, vr->wrk, &vr->log_context, fmt, __VA_ARGS__)

include/lighttpd/settings.h

@@ -65,8 +65,6 @@
 #define GUSTR_LEN(x) ((const guchar*) ((x)->str)), ((x)->len)
 #define GSTR_SAFE_STR(x) ((x && x->str) ? x->str : "(null)")
 
-#include <assert.h>
-
 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif

include/lighttpd/utils.h

@@ -9,7 +9,13 @@ typedef enum {
 	COUNTER_UNITS
 } liCounterType;
 
-LI_API void li_fatal(const gchar* msg);
+/* log message, print backtrace, and abort() (use LI_FATAL(msg) to call it) */
+LI_API void li_fatal(const char *filename, unsigned int line, const char *function, const char *msg) G_GNUC_NORETURN;
+/* if libunwind is available this prints a backtrace to STDERR */
+LI_API void li_print_backtrace_stderr(void);
+/* LI_FORCE_ASSERT is *always* active - in debug and release builds */
+#define LI_FORCE_ASSERT(x) do { if (G_UNLIKELY(!(x))) li_fatal(__FILE__, __LINE__, G_STRFUNC, "Assertion `" #x "' failed."); } while(0)
+#define LI_FATAL(msg) li_fatal(__FILE__, __LINE__, G_STRFUNC, msg)
 
 /* set O_NONBLOCK and FD_CLOEXEC */
 LI_API void li_fd_init(int fd);

src/CMakeLists.txt

@@ -19,6 +19,7 @@ ADD_DEFINITIONS(-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGE_FILES)
 
 OPTION(WITH_LUA "with lua 5.1 for lua-configfile [default: on]" ON)
 OPTION(WITHOUT_CONFIG_PARSER "without standard config parser [default: off]" OFF)
+OPTION(WITH_UNWIND "with (lib)unwind support in asserts to print backtraces [default: off]" OFF)
 OPTION(WITH_OPENSSL "with openssl support [default: off]")
 OPTION(WITH_GNUTLS "with gnutls support [default: off]")
 OPTION(WITH_SNI "with SNI support for gnutls/openssl, needs libidn [default: off]")
@@ -109,6 +110,11 @@ IF(WITH_GNUTLS)
   pkg_search_module(GNUTLS REQUIRED gnutls)
 ENDIF(WITH_GNUTLS)
 
+IF(WITH_UNWIND)
+  pkg_search_module(UNWIND REQUIRED libunwind)
+  SET(HAVE_LIBUNWIND 1 "Have libunwind")
+ENDIF(WITH_UNWIND)
+
 IF(WITH_OPENSSL)
   CHECK_INCLUDE_FILES(openssl/ssl.h HAVE_OPENSSL_SSL_H)
   IF(HAVE_OPENSSL_SSL_H)
@@ -388,8 +394,8 @@ IF(WITH_OPENSSL)
   ADD_TARGET_PROPERTIES(mod_openssl COMPILE_FLAGS ${IDN_CFLAGS})
 ENDIF(WITH_OPENSSL)
 
-TARGET_LINK_LIBRARIES(lighttpd-${PACKAGE_VERSION}-common ${COMMON_LDFLAGS})
-ADD_TARGET_PROPERTIES(lighttpd-${PACKAGE_VERSION}-common COMPILE_FLAGS ${COMMON_CFLAGS})
+TARGET_LINK_LIBRARIES(lighttpd-${PACKAGE_VERSION}-common ${COMMON_LDFLAGS} ${UNWIND_LDFLAGS})
+ADD_TARGET_PROPERTIES(lighttpd-${PACKAGE_VERSION}-common COMPILE_FLAGS ${COMMON_CFLAGS} ${UNWIND_CFLAGS})
 
 TARGET_LINK_LIBRARIES(lighttpd-${PACKAGE_VERSION}-shared ${COMMON_LDFLAGS})
 ADD_TARGET_PROPERTIES(lighttpd-${PACKAGE_VERSION}-shared COMPILE_FLAGS ${COMMON_CFLAGS})

src/angel/angel_config_parser.rl

@@ -413,7 +413,7 @@ static liConfigToken tokenizer_next(liConfigTokenizerContext *ctx, GError **erro
 		else if (TK_ERROR == (token = tokenizer_next(ctx, error))) goto error; \
 	} while (0)
 #define REMEMBER(token) do { \
-		assert(TK_ERROR == ctx->next_token); /* mustn't contain a token */ \
+		LI_FORCE_ASSERT(TK_ERROR == ctx->next_token); /* mustn't contain a token */ \
 		ctx->next_token = token; \
 	} while (0)
 

src/angel/angel_plugin_core.c

@@ -498,7 +498,7 @@ static void listen_ref_release(liServer *srv, liInstance *i, liPlugin *p, liInst
 	UNUSED(i);
 	UNUSED(srv);
 
-	assert(g_atomic_int_get(&sock->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&sock->refcount) > 0);
 	if (g_atomic_int_dec_and_test(&sock->refcount)) {
 		liPluginCoreConfig *config = (liPluginCoreConfig*) p->data;
 

src/angel/angel_server.c

@@ -387,7 +387,7 @@ void li_instance_release(liInstance *i) {
 }
 
 void li_instance_acquire(liInstance *i) {
-	assert(g_atomic_int_get(&i->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&i->refcount) > 0);
 	g_atomic_int_inc(&i->refcount);
 }
 
@@ -406,7 +406,7 @@ liInstanceConf* li_instance_conf_new(gchar **cmd, gchar **env, GString *username
 
 void li_instance_conf_release(liInstanceConf *ic) {
 	if (!ic) return;
-	assert(g_atomic_int_get(&ic->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&ic->refcount) > 0);
 	if (!g_atomic_int_dec_and_test(&ic->refcount)) return;
 
 	if (ic->username) g_string_free(ic->username, TRUE);
@@ -416,7 +416,7 @@ void li_instance_conf_release(liInstanceConf *ic) {
 }
 
 void li_instance_conf_acquire(liInstanceConf *ic) {
-	assert(g_atomic_int_get(&ic->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&ic->refcount) > 0);
 	g_atomic_int_inc(&ic->refcount);
 }
 

src/common/Makefile.am

@@ -39,5 +39,5 @@ ip_parsers.c: ip_parsers.rl
 
 liblighttpd2_common_la_SOURCES=$(common_src)
 nodist_liblighttpd2_common_la_SOURCES=$(nodist_common_src)
-liblighttpd2_common_la_CPPFLAGS=$(common_cflags) $(GTHREAD_CFLAGS) $(GMODULE_CFLAGS) $(LIBEV_CFLAGS)
-liblighttpd2_common_la_LDFLAGS=-release $(PACKAGE_VERSION) -export-dynamic $(GTHREAD_LIBS) $(GMODULE_LIBS) $(LIBEV_LIBS) $(CRYPT_LIB)
+liblighttpd2_common_la_CPPFLAGS=$(common_cflags) $(GTHREAD_CFLAGS) $(GMODULE_CFLAGS) $(LIBEV_CFLAGS) $(LIBUNWIND_CFLAGS)
+liblighttpd2_common_la_LDFLAGS=-release $(PACKAGE_VERSION) -export-dynamic $(GTHREAD_LIBS) $(GMODULE_LIBS) $(LIBEV_LIBS) $(CRYPT_LIB) $(LIBUNWIND_LIBS)

src/common/angel_connection.c

@@ -489,7 +489,7 @@ static void angel_call_result_cb(liEventBase *watcher, int events) {
 	liAngelCall* call = LI_CONTAINER_OF(li_event_async_from(watcher), liAngelCall, result_watcher);
 	UNUSED(events);
 
-	assert(-1 == call->id);
+	LI_FORCE_ASSERT(-1 == call->id);
 
 	call->acon = NULL;
 

src/common/buffer.c

@@ -1,5 +1,6 @@
 
 #include <lighttpd/buffer.h>
+#include <lighttpd/utils.h>
 
 static void _buffer_init(liBuffer *buf, gsize alloc_size) {
 	buf->alloc_size = alloc_size;
@@ -47,13 +48,13 @@ liBuffer* li_buffer_new_slice(gsize max_size) {
 
 void li_buffer_release(liBuffer *buf) {
 	if (!buf) return;
-	assert(g_atomic_int_get(&buf->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&buf->refcount) > 0);
 	if (g_atomic_int_dec_and_test(&buf->refcount)) {
 		_buffer_destroy(buf);
 	}
 }
 
 void li_buffer_acquire(liBuffer *buf) {
-	assert(g_atomic_int_get(&buf->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&buf->refcount) > 0);
 	g_atomic_int_inc(&buf->refcount);
 }

src/common/events.c

@@ -103,9 +103,9 @@ struct ev_loop* li_event_loop_clear(liEventLoop *loop) {
 
 	while (NULL != (lnk = loop->watchers.head)) {
 		liEventBase *base = LI_CONTAINER_OF(lnk, liEventBase, link_watchers);
-		assert(li_event_attached_(base));
+		LI_FORCE_ASSERT(li_event_attached_(base));
 		li_event_detach_(base);
-		assert(lnk != loop->watchers.head);
+		LI_FORCE_ASSERT(lnk != loop->watchers.head);
 	}
 	loop->loop = NULL;
 	return evloop;
@@ -155,8 +155,8 @@ static void event_io_cb(struct ev_loop *loop, ev_io *w, int revents) {
 	liEventLoop *my_loop = io->base.link_watchers.data;
 	int events = 0;
 
-	assert(NULL != my_loop);
-	assert(loop == my_loop->loop);
+	LI_FORCE_ASSERT(NULL != my_loop);
+	LI_FORCE_ASSERT(loop == my_loop->loop);
 
 	if (revents & EV_READ) events |= LI_EV_READ;
 	if (revents & EV_WRITE) events |= LI_EV_WRITE;
@@ -193,7 +193,7 @@ void li_event_io_set_fd(liEventIO *io, int fd) {
 
 	if (li_event_attached(io) && li_event_active(io)) {
 		liEventLoop *loop = io->base.link_watchers.data;
-		assert(NULL != loop);
+		LI_FORCE_ASSERT(NULL != loop);
 
 		ev_ref(loop->loop);
 
@@ -213,7 +213,7 @@ void li_event_io_set_events(liEventIO *io, int events) {
 
 	if (li_event_attached(io) && li_event_active(io)) {
 		liEventLoop *loop = io->base.link_watchers.data;
-		assert(NULL != loop);
+		LI_FORCE_ASSERT(NULL != loop);
 
 		ev_ref(loop->loop);
 
@@ -239,8 +239,8 @@ static void event_timer_cb(struct ev_loop *loop, ev_timer *w, int revents) {
 	liEventLoop *my_loop = timer->base.link_watchers.data;
 	UNUSED(revents);
 
-	assert(NULL != my_loop);
-	assert(loop == my_loop->loop);
+	LI_FORCE_ASSERT(NULL != my_loop);
+	LI_FORCE_ASSERT(loop == my_loop->loop);
 
 	if (ev_is_active(w)) {
 		if (!timer->base.keep_loop_alive) ev_ref(loop);
@@ -267,8 +267,8 @@ static void event_async_cb(struct ev_loop *loop, ev_async *w, int revents) {
 	liEventLoop *my_loop = async->base.link_watchers.data;
 	UNUSED(revents);
 
-	assert(NULL != my_loop);
-	assert(loop == my_loop->loop);
+	LI_FORCE_ASSERT(NULL != my_loop);
+	LI_FORCE_ASSERT(loop == my_loop->loop);
 
 	async->base.callback(&async->base, LI_EV_WAKEUP);
 }
@@ -290,8 +290,8 @@ static void event_child_cb(struct ev_loop *loop, ev_child *w, int revents) {
 	liEventLoop *my_loop = child->base.link_watchers.data;
 	UNUSED(revents);
 
-	assert(NULL != my_loop);
-	assert(loop == my_loop->loop);
+	LI_FORCE_ASSERT(NULL != my_loop);
+	LI_FORCE_ASSERT(loop == my_loop->loop);
 
 	if (ev_is_active(w)) {
 		if (!child->base.keep_loop_alive) ev_ref(loop);
@@ -320,8 +320,8 @@ static void event_signal_cb(struct ev_loop *loop, ev_signal *w, int revents) {
 	liEventLoop *my_loop = sig->base.link_watchers.data;
 	UNUSED(revents);
 
-	assert(NULL != my_loop);
-	assert(loop == my_loop->loop);
+	LI_FORCE_ASSERT(NULL != my_loop);
+	LI_FORCE_ASSERT(loop == my_loop->loop);
 
 	sig->base.callback(&sig->base, LI_EV_WAKEUP);
 }
@@ -344,8 +344,8 @@ static void event_prepare_cb(struct ev_loop *loop, ev_prepare *w, int revents) {
 	liEventLoop *my_loop = prepare->base.link_watchers.data;
 	UNUSED(revents);
 
-	assert(NULL != my_loop);
-	assert(loop == my_loop->loop);
+	LI_FORCE_ASSERT(NULL != my_loop);
+	LI_FORCE_ASSERT(loop == my_loop->loop);
 
 	prepare->base.callback(&prepare->base, LI_EV_WAKEUP);
 }
@@ -367,8 +367,8 @@ static void event_check_cb(struct ev_loop *loop, ev_check *w, int revents) {
 	liEventLoop *my_loop = check->base.link_watchers.data;
 	UNUSED(revents);
 
-	assert(NULL != my_loop);
-	assert(loop == my_loop->loop);
+	LI_FORCE_ASSERT(NULL != my_loop);
+	LI_FORCE_ASSERT(loop == my_loop->loop);
 
 	check->base.callback(&check->base, LI_EV_WAKEUP);
 }

src/common/fetch.c

@@ -87,7 +87,7 @@ static void append_to_lru(liFetchEntryP *pentry) {
 	GQueue *q = NULL != pentry->public.data ? &db->lru_queue : &db->lru_negative_queue;
 	guint limit = NULL != pentry->public.data ? db->cache_size : db->neg_cache_size;
 
-	assert(LI_ENTRY_VALID == pentry->state);
+	LI_FORCE_ASSERT(LI_ENTRY_VALID == pentry->state);
 	g_queue_push_tail_link(q, &pentry->lru_link);
 	while (q->length > limit) {
 		GList *lru_link  =g_queue_peek_head_link(q);
@@ -97,15 +97,15 @@ static void append_to_lru(liFetchEntryP *pentry) {
 }
 
 static void fetch_db_int_acquire(liFetchDatabase* db) {
-	assert(g_atomic_int_get(&db->internal_refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&db->internal_refcount) > 0);
 	g_atomic_int_inc(&db->internal_refcount);
 }
 
 static void fetch_db_int_release(liFetchDatabase* db) {
-	assert(g_atomic_int_get(&db->internal_refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&db->internal_refcount) > 0);
 	if (g_atomic_int_dec_and_test(&db->internal_refcount)) {
 		db->internal_refcount = 1;
-		assert(NULL == db->cache);
+		LI_FORCE_ASSERT(NULL == db->cache);
 
 		if (NULL != db->callbacks->free_db) db->callbacks->free_db(db->data);
 
@@ -113,33 +113,33 @@ static void fetch_db_int_release(liFetchDatabase* db) {
 		db->lock = NULL;
 		db->data = NULL;
 		db->callbacks = NULL;
-		assert(1 == db->internal_refcount);
+		LI_FORCE_ASSERT(1 == db->internal_refcount);
 		g_slice_free(liFetchDatabase, db);
 	}
 }
 
 void li_fetch_database_acquire(liFetchDatabase* db) {
-	assert(g_atomic_int_get(&db->refcount) > 0);
-	assert(g_atomic_int_get(&db->internal_refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&db->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&db->internal_refcount) > 0);
 	g_atomic_int_inc(&db->refcount);
 }
 
 void li_fetch_database_release(liFetchDatabase* db) {
-	assert(g_atomic_int_get(&db->refcount) > 0);
-	assert(g_atomic_int_get(&db->internal_refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&db->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&db->internal_refcount) > 0);
 	if (g_atomic_int_dec_and_test(&db->refcount)) {
 		GHashTable *cache = db->cache;
 		db->refcount = 1;
 
 		g_mutex_lock(db->lock);
 
-			assert(NULL != cache);
+			LI_FORCE_ASSERT(NULL != cache);
 			db->cache = NULL;
 			g_hash_table_destroy(cache);
 
 		g_mutex_unlock(db->lock);
 
-		assert(1 == db->refcount);
+		LI_FORCE_ASSERT(1 == db->refcount);
 		db->refcount = 0;
 		fetch_db_int_release(db);
 	}
@@ -147,7 +147,7 @@ void li_fetch_database_release(liFetchDatabase* db) {
 
 void li_fetch_entry_acquire(liFetchEntry *entry) {
 	liFetchEntryP *pentry = LI_CONTAINER_OF(entry, liFetchEntryP, public);
-	assert(g_atomic_int_get(&pentry->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&pentry->refcount) > 0);
 	g_atomic_int_inc(&pentry->refcount);
 }
 
@@ -156,7 +156,7 @@ void li_fetch_entry_release(liFetchEntry *entry) {
 	if (NULL == entry) return;
 
 	pentry = LI_CONTAINER_OF(entry, liFetchEntryP, public);
-	assert(g_atomic_int_get(&pentry->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&pentry->refcount) > 0);
 	if (g_atomic_int_dec_and_test(&pentry->refcount)) {
 		liFetchEntryState state = g_atomic_int_get(&pentry->state);
 		liFetchDatabase *db = pentry->db;
@@ -167,11 +167,11 @@ void li_fetch_entry_release(liFetchEntry *entry) {
 		g_string_free(pentry->public.key, TRUE);
 		pentry->public.key = NULL;
 
-		assert(LI_ENTRY_INVALID == state);
+		LI_FORCE_ASSERT(LI_ENTRY_INVALID == state);
 
 		pentry->db = NULL;
 		fetch_db_int_release(db);
-		assert(1 == pentry->refcount);
+		LI_FORCE_ASSERT(1 == pentry->refcount);
 		pentry->refcount = 0;
 		g_slice_free(liFetchEntryP, pentry);
 	}
@@ -188,7 +188,7 @@ void li_fetch_invalidate(liFetchDatabase* db, GString *key) {
 		if (NULL == pentry) goto out;
 
 		state = g_atomic_int_get(&pentry->state);
-		assert(LI_ENTRY_REFRESH_NEW != state && LI_ENTRY_INVALID != state); /* this is never in the cache */
+		LI_FORCE_ASSERT(LI_ENTRY_REFRESH_NEW != state && LI_ENTRY_INVALID != state); /* this is never in the cache */
 		switch (state) {
 		case LI_ENTRY_LOOKUP:
 			goto out;
@@ -221,7 +221,7 @@ static void cache_delete_data_cb(gpointer data) {
 	GQueue wait_queue = G_QUEUE_INIT;
 	liFetchEntryP *new_entry = NULL;
 
-	assert(LI_ENTRY_REFRESH_NEW != state && LI_ENTRY_INVALID != state); /* this is never in the cache */
+	LI_FORCE_ASSERT(LI_ENTRY_REFRESH_NEW != state && LI_ENTRY_INVALID != state); /* this is never in the cache */
 
 	switch (state) {
 	case LI_ENTRY_LOOKUP:
@@ -248,8 +248,8 @@ static void cache_delete_data_cb(gpointer data) {
 	g_atomic_int_set(&pentry->state, LI_ENTRY_INVALID);
 
 	if (NULL != new_entry) {
-		assert(pentry == new_entry->refreshing);
-		assert(LI_ENTRY_REFRESH_NEW == g_atomic_int_get(&new_entry->state));
+		LI_FORCE_ASSERT(pentry == new_entry->refreshing);
+		LI_FORCE_ASSERT(LI_ENTRY_REFRESH_NEW == g_atomic_int_get(&new_entry->state));
 		new_entry->refreshing = NULL;
 		g_atomic_int_set(&new_entry->state, LI_ENTRY_INVALID);
 		li_fetch_entry_release(&pentry->public);
@@ -290,7 +290,7 @@ void li_fetch_entry_ready(liFetchEntry *entry) {
 
 		if (LI_ENTRY_INVALID == state) goto out;
 
-		assert(LI_ENTRY_LOOKUP == state);
+		LI_FORCE_ASSERT(LI_ENTRY_LOOKUP == state);
 
 		g_atomic_int_set(&pentry->state, LI_ENTRY_VALID);
 		append_to_lru(pentry);
@@ -373,14 +373,14 @@ void li_fetch_entry_refresh_skip(liFetchEntry *new_entry) {
 
 		if (LI_ENTRY_INVALID == state) goto out;
 
-		assert(LI_ENTRY_REFRESH_NEW == state);
+		LI_FORCE_ASSERT(LI_ENTRY_REFRESH_NEW == state);
 
 		pentry = pnew_entry->refreshing;
 		pnew_entry->refreshing = NULL;
-		assert(pnew_entry == pentry->refreshing);
+		LI_FORCE_ASSERT(pnew_entry == pentry->refreshing);
 
 		state = g_atomic_int_get(&pentry->state);
-		assert(LI_ENTRY_REFRESH_OLD == state || LI_ENTRY_REFRESH_INVALID == state);
+		LI_FORCE_ASSERT(LI_ENTRY_REFRESH_OLD == state || LI_ENTRY_REFRESH_INVALID == state);
 		if (LI_ENTRY_REFRESH_OLD == state) {
 			g_atomic_int_set(&pentry->state, LI_ENTRY_VALID);
 			append_to_lru(pentry);
@@ -426,14 +426,14 @@ void li_fetch_entry_refresh_ready(liFetchEntry *new_entry) {
 
 		if (LI_ENTRY_INVALID == state) goto out;
 
-		assert(LI_ENTRY_REFRESH_NEW == state);
+		LI_FORCE_ASSERT(LI_ENTRY_REFRESH_NEW == state);
 
 		pentry = pnew_entry->refreshing;
 		pnew_entry->refreshing = NULL;
-		assert(pnew_entry == pentry->refreshing);
+		LI_FORCE_ASSERT(pnew_entry == pentry->refreshing);
 
 		state = g_atomic_int_get(&pentry->state);
-		assert(LI_ENTRY_REFRESH_OLD == state || LI_ENTRY_REFRESH_INVALID == state);
+		LI_FORCE_ASSERT(LI_ENTRY_REFRESH_OLD == state || LI_ENTRY_REFRESH_INVALID == state);
 
 		wait_queue = entry_extract_wait_queue(pnew_entry);
 
@@ -460,7 +460,7 @@ gboolean li_fetch_entry_revalidate(liFetchEntry *entry) {
 	liFetchDatabase *db = pentry->db;
 	liFetchEntryState state = g_atomic_int_get(&pentry->state);
 
-	assert(LI_ENTRY_REFRESH_NEW != state);
+	LI_FORCE_ASSERT(LI_ENTRY_REFRESH_NEW != state);
 	switch (state) {
 	case LI_ENTRY_LOOKUP:
 		return FALSE;
@@ -506,7 +506,7 @@ liFetchEntry* li_fetch_get2(liFetchDatabase* db, GString *key, liFetchWakeupCB w
 	liFetchEntryP *result = NULL;
 	liFetchEntryState state;
 
-	assert(NULL != wakeup);
+	LI_FORCE_ASSERT(NULL != wakeup);
 
 	g_mutex_lock(db->lock);
 
@@ -536,7 +536,7 @@ liFetchEntry* li_fetch_get2(liFetchDatabase* db, GString *key, liFetchWakeupCB w
 		pentry_new = pentry;
 
 		state = g_atomic_int_get(&pentry->state);
-		assert(LI_ENTRY_REFRESH_NEW != state);
+		LI_FORCE_ASSERT(LI_ENTRY_REFRESH_NEW != state);
 		switch (state) {
 		case LI_ENTRY_LOOKUP:
 			/* lookup in progress, just register wakeup */

src/common/jobqueue.c

@@ -169,7 +169,7 @@ void li_job_now(liJobQueue *jq, liJob *job) {
 
 		/* unqueue if queued */
 		if (NULL != job->link.data) {
-			assert(jq == job->link.data);
+			LI_FORCE_ASSERT(jq == job->link.data);
 			g_queue_unlink(&jq->queue, &job->link);
 			job->link.data = NULL;
 		}

src/common/memcached.c

@@ -835,14 +835,14 @@ static void li_memcached_con_free(liMemcachedCon* con) {
 
 void li_memcached_con_release(liMemcachedCon* con) {
 	if (!con) return;
-	assert(g_atomic_int_get(&con->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&con->refcount) > 0);
 	if (g_atomic_int_dec_and_test(&con->refcount)) {
 		li_memcached_con_free(con);
 	}
 }
 
 void li_memcached_con_acquire(liMemcachedCon* con) {
-	assert(g_atomic_int_get(&con->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&con->refcount) > 0);
 	g_atomic_int_inc(&con->refcount);
 }
 

src/common/mempool.c

@@ -1,5 +1,6 @@
 
 #include <lighttpd/mempool.h>
+#include <lighttpd/utils.h>
 
 #ifdef WITH_PROFILER
 #include <lighttpd/profiler.h>
@@ -224,7 +225,7 @@ static mp_magazine* mp_mag_new(mp_pool *pool) {
 /* do NOT call with lock held */
 static inline void mp_mag_release(mp_magazine *mag) {
 	if (!mag) return;
-	assert(g_atomic_int_get(&mag->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&mag->refcount) > 0);
 	if (g_atomic_int_dec_and_test(&mag->refcount)) {
 		MP_LOCK_FREE(mag->mutex);
 		g_slice_free(mp_magazine, mag);
@@ -232,7 +233,7 @@ static inline void mp_mag_release(mp_magazine *mag) {
 }
 
 static inline void mp_mag_acquire(mp_magazine *mag) {
-	assert(g_atomic_int_get(&mag->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&mag->refcount) > 0);
 	g_atomic_int_inc(&mag->refcount);
 }
 

src/common/profiler.c

@@ -103,7 +103,7 @@ static gpointer profiler_try_malloc(gsize n_bytes) {
 static gpointer profiler_malloc(gsize n_bytes) {
 	gpointer p = profiler_try_malloc(n_bytes);
 
-	assert(p);
+	LI_FORCE_ASSERT(p);
 
 	return p;
 }
@@ -137,7 +137,7 @@ static gpointer profiler_try_realloc(gpointer mem, gsize n_bytes) {
 static gpointer profiler_realloc(gpointer mem, gsize n_bytes) {
 	gpointer p = profiler_try_realloc(mem, n_bytes);
 
-	assert(p);
+	LI_FORCE_ASSERT(p);
 
 	return p;
 }
@@ -157,13 +157,13 @@ static gpointer profiler_calloc(gsize n_blocks, gsize n_bytes) {
 		li_profiler_hashtable_insert(p, n_bytes);
 	}
 
-	assert(p);
+	LI_FORCE_ASSERT(p);
 
 	return p;
 }
 
 static void profiler_free(gpointer mem) {
-	assert(mem);
+	LI_FORCE_ASSERT(mem);
 	li_profiler_hashtable_remove(mem);
 	free(mem);
 }

src/common/radix.c

@@ -1,5 +1,6 @@
 
 #include <lighttpd/radix.h>
+#include <lighttpd/utils.h>
 
 /* internal data is saved in "host"-order; search from high to low bit */
 typedef guint32 rdxBase;
@@ -87,13 +88,13 @@ gpointer li_radixtree_insert(liRadixTree *tree, const void *key, guint32 bits, g
 			/* split node */
 			liRadixNode *newnode;
 			guint32 width = (node->width > bits) ? bits : node->width;
-			assert(width <= RDXBITS);
+			LI_FORCE_ASSERT(width <= RDXBITS);
 			mask = RDX_MASK(width);
 			while ((current & mask) != (node->key & mask)) {
 				width--;
 				mask <<= 1;
 			}
-			assert(width <= RDXBITS-1);
+			LI_FORCE_ASSERT(width <= RDXBITS-1);
 			newnode = g_slice_new0(liRadixNode);
 			newnode->width = width;
 			newnode->key = current & mask;

src/common/utils.c

@@ -15,9 +15,67 @@ union fdmsg {
   gchar buf[1000];
 };
 
+#ifdef HAVE_LIBUNWIND
+# define UNW_LOCAL_ONLY
+# include <libunwind.h>
+
+void li_print_backtrace_stderr(void) {
+	unw_cursor_t cursor;
+	unw_context_t context;
+	unw_proc_info_t procinfo;
+	unw_word_t proc_offset;
+	void *proc_ip;
+	char procname[256];
+	int ret;
+	unsigned int frame = 0;
+
+	if (0 != (ret = unw_getcontext(&context))) goto error;
+	if (0 != (ret = unw_init_local(&cursor, &context))) goto error;
+
+	fprintf(stderr, "Backtrace:\n");
+
+	while (0 < (ret = unw_step(&cursor))) {
+		if (0 != (ret = unw_get_proc_info(&cursor, &procinfo))) goto error;
+
+		if (0 != (ret = unw_get_proc_name(&cursor, procname, sizeof(procname), &proc_offset))) {
+			switch (-ret) {
+			case UNW_ENOMEM:
+				memset(procname + sizeof(procname) - 4, '.', 3);
+				procname[sizeof(procname) - 1] = '\0';
+				break;
+			case UNW_ENOINFO:
+				procname[0] = '?';
+				procname[1] = '\0';
+				proc_offset = 0;
+				break;
+			default:
+				goto error;
+			}
+		}
+
+		++frame;
+		proc_ip = (void*) (intptr_t) (procinfo.start_ip + proc_offset);
+		fprintf(stderr, "%u: %s (+0x%x) [%p]\n", frame, procname, (unsigned int) proc_offset, proc_ip);
+	}
+
+	if (0 != ret) goto error;
+
+	return;
+
+error:
+	fprintf(stderr, "Error while generating backtrace: unwind error %i\n", (int) -ret);
+}
+#else
+void li_print_backtrace_stderr(void) {
+}
+#endif
 
-void li_fatal(const gchar* msg) {
-	fprintf(stderr, "%s\n", msg);
+void li_fatal(const char *filename, unsigned int line, const char *function, const gchar* msg) {
+	if (!filename || !filename[0]) filename = "<unknown file>";
+	if (!function || !function[0]) function = "<unknown function>";
+	fprintf(stderr, "[%lu] %s:%u: %s: %s\n",
+		(gulong) getpid(), LI_REMOVE_PATH(filename), line, function, msg);
+	li_print_backtrace_stderr();
 	abort();
 }
 
@@ -960,7 +1018,7 @@ void li_safe_crypt(GString *dest, const GString *password, const GString *salt)
 
 
 void li_g_queue_merge(GQueue *dest, GQueue *src) {
-	assert(dest != src);
+	LI_FORCE_ASSERT(dest != src);
 	if (g_queue_is_empty(src)) return; /* nothing to do */
 
 	/* if dest is empty, just swap dest / src */

src/common/value.c

@@ -1,6 +1,7 @@
 #define _LIGHTTPD_COMMON_VALUE_C_
 
 #include <lighttpd/value.h>
+#include <lighttpd/utils.h>
 
 liValue* li_value_new_none(void) {
 	liValue *v = g_slice_new0(liValue);
@@ -51,13 +52,13 @@ GHashTable *li_value_new_hashtable(void) {
 }
 
 void li_value_list_append(liValue *list, liValue *item) {
-	assert(LI_VALUE_LIST == list->type);
+	LI_FORCE_ASSERT(LI_VALUE_LIST == list->type);
 	g_ptr_array_add(list->data.list, item);
 }
 
 void li_value_wrap_in_list(liValue *val) {
 	liValue *item;
-	assert(NULL != val);
+	LI_FORCE_ASSERT(NULL != val);
 
 	item = li_value_extract(val);
 	val->type = LI_VALUE_LIST;
@@ -117,7 +118,7 @@ void li_value_free(liValue* val) {
 }
 
 void li_value_move(liValue *dest, liValue *src) {
-	assert(NULL != dest && NULL != src && dest != src);
+	LI_FORCE_ASSERT(NULL != dest && NULL != src && dest != src);
 	li_value_clear(dest);
 	*dest = *src;
 	_li_value_clear(src);

src/config.h.cmake

@@ -105,6 +105,9 @@
 #cmakedefine  HAVE_LUA_H
 #cmakedefine  HAVE_LIBLUA
 
+/* libunwind */
+#cmakedefine  HAVE_LIBUNWIND
+
 /* inotify */
 #cmakedefine  HAVE_INOTIFY_INIT
 #cmakedefine  HAVE_SYS_INOTIFY_H

src/main/actions.c

@@ -15,7 +15,7 @@ struct action_stack_element {
 void li_action_release(liServer *srv, liAction *a) {
 	guint i;
 	if (!a) return;
-	assert(g_atomic_int_get(&a->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&a->refcount) > 0);
 	if (g_atomic_int_dec_and_test(&a->refcount)) {
 		switch (a->type) {
 		case LI_ACTION_TNOTHING:
@@ -52,7 +52,7 @@ void li_action_release(liServer *srv, liAction *a) {
 }
 
 void li_action_acquire(liAction *a) {
-	assert(g_atomic_int_get(&a->refcount) > 0);
+	LI_FORCE_ASSERT(g_atomic_int_get(&a->refcount) > 0);
 	g_atomic_int_inc(&a->refcount);
 }
 
@@ -140,8 +140,8 @@ liAction *li_action_new_balancer(liBackendSelectCB bselect, liBackendFallbackCB
 }
 
 void li_action_append_inplace(liAction *list, liAction *element) {
-	assert(NULL != list && NULL != element);
-	assert(1 == g_atomic_int_get(&list->refcount));
+	LI_FORCE_ASSERT(NULL != list && NULL != element);
+	LI_FORCE_ASSERT(1 == g_atomic_int_get(&list->refcount));
 
 	if (LI_ACTION_TLIST != list->type) {
 		liAction *wrapped = NULL;

src/main/backends.c

@@ -105,9 +105,9 @@ static void S_backend_pool_worker_remove_con(liBackendPool_p *pool, liBackendCon
 	gint last_reserved_ndx = last_active_ndx + wpool->reserved;
 	gint last_idle_ndx = last_reserved_ndx + wpool->idle;
 
-	assert(con->ndx >= 0 && (guint)con->ndx < wpool->connections->len);
-	assert(g_ptr_array_index(wpool->connections, con->ndx) == con);
-	assert(last_idle_ndx == (gint) wpool->connections->len - 1);
+	LI_FORCE_ASSERT(con->ndx >= 0 && (guint)con->ndx < wpool->connections->len);
+	LI_FORCE_ASSERT(g_ptr_array_index(wpool->connections, con->ndx) == con);
+	LI_FORCE_ASSERT(last_idle_ndx == (gint) wpool->connections->len - 1);
 
 	if (ndx <= last_active_ndx) {
 		--wpool->active;
@@ -205,7 +205,7 @@ static void S_backend_pool_worker_insert_con(liBackendPool_p *pool, liWorker *wr
 			con->ndx = wpool->active + wpool->reserved;
 		}
 		g_ptr_array_index(wpool->connections, con->ndx) = con;
-		assert(con->ndx == min_ndx);
+		LI_FORCE_ASSERT(con->ndx == min_ndx);
 	} else if (con->ndx > max_ndx) {
 		if ((guint) con->ndx > wpool->active + wpool->reserved - 1) {
 			liBackendConnection_p *move = g_ptr_array_index(wpool->connections, wpool->active + wpool->reserved - 1);
@@ -220,9 +220,9 @@ static void S_backend_pool_worker_insert_con(liBackendPool_p *pool, liWorker *wr
 			con->ndx = wpool->active - 1;
 		}
 		g_ptr_array_index(wpool->connections, con->ndx) = con;
-		assert(con->ndx == max_ndx);
+		LI_FORCE_ASSERT(con->ndx == max_ndx);
 	} else {
-		assert(con->ndx >= min_ndx && con->ndx <= max_ndx);
+		LI_FORCE_ASSERT(con->ndx >= min_ndx && con->ndx <= max_ndx);
 	}
 }
 
@@ -516,7 +516,7 @@ static void S_backend_pool_distribute(liBackendPool_p *pool, liWorker *wrk) {
 				guint src = 0;
 				guint i;
 
-				assert(pool->idle >= use);
+				LI_FORCE_ASSERT(pool->idle >= use);
 				for (i = 0; i < worker_count; ++i) {
 					liBackendWorkerPool *wpool = &pool->worker_pools[i];
 
@@ -527,7 +527,7 @@ static void S_backend_pool_distribute(liBackendPool_p *pool, liWorker *wrk) {
 
 						while (0 == pool->worker_pools[src].idle) {
 							++src;
-							assert(src < worker_count);
+							LI_FORCE_ASSERT(src < worker_count);
 						}
 						srcpool = &pool->worker_pools[src];
 						con = g_ptr_array_index(srcpool->connections, srcpool->active + srcpool->reserved);
@@ -650,7 +650,7 @@ static void backend_pool_worker_run_reserved(liBackendWorkerPool *wpool) {
 		liBackendConnection_p *con = g_ptr_array_index(wpool->connections, wpool->active);
 		if (NULL == con->worker) {
 			/* attach */
-			assert(con->worker_next == wrk);
+			LI_FORCE_ASSERT(con->worker_next == wrk);
 			con->worker = wrk;
 			con->worker_next = NULL;
 
@@ -671,10 +671,10 @@ static void backend_pool_worker_run_reserved(liBackendWorkerPool *wpool) {
 			}
 		}
 
-		assert(NULL != con->wait);
+		LI_FORCE_ASSERT(NULL != con->wait);
 
 		if (NULL == con->worker_next) {
-			assert(con->wait->vr->wrk == wrk);
+			LI_FORCE_ASSERT(con->wait->vr->wrk == wrk);
 			if (!con->active) {
 				con->active = TRUE;
 				S_backend_pool_worker_insert_con(pool, wrk, con);