Fix signal handling for debugger

src/debugger/debugger.c

@@ -11,6 +11,10 @@
 #include <string.h>
 #include <unistd.h>
 
+#ifdef USE_PTHREADS
+#include <pthread.h>
+#endif
+
 struct DebugVector {
 	struct DebugVector* next;
 	enum DVType {
@@ -92,9 +96,18 @@ static void _handleDeath(int sig) {
 static void _breakInto(struct ARMDebugger* debugger, struct DebugVector* dv) {
 	(void)(debugger);
 	(void)(dv);
-	sig_t oldSignal = signal(SIGTRAP, _handleDeath);
+	struct sigaction sa, osa;
+	sa.sa_handler = _handleDeath;
+	sigemptyset(&sa.sa_mask);
+	sigaddset(&sa.sa_mask, SIGTRAP);
+	sa.sa_flags = SA_RESTART;
+	sigaction(SIGTRAP, &sa, &osa);
+#ifdef USE_PTHREADS
+	pthread_kill(pthread_self(), SIGTRAP);
+#else
 	kill(getpid(), SIGTRAP);
-	signal(SIGTRAP, oldSignal);
+#endif
+	sigaction(SIGTRAP, &osa, 0);
 }
 
 static void _continue(struct ARMDebugger* debugger, struct DebugVector* dv) {

src/gba/gba-thread.c

@@ -53,7 +53,8 @@ static THREAD_ENTRY _GBAThreadRun(void* context) {
 #if !defined(_WIN32) && defined(USE_PTHREADS)
 	sigset_t signals;
 	sigfillset(&signals);
-	pthread_sigmask(SIG_UNBLOCK, &signals, 0);
+	sigdelset(&signals, SIGTRAP);
+	pthread_sigmask(SIG_SETMASK, &signals, 0);
 #endif
 
 	GBAInit(&gba);
@@ -166,6 +167,14 @@ int GBAThreadStart(struct GBAThread* threadContext) {
 	MutexInit(&threadContext->sync.audioBufferMutex);
 	ConditionInit(&threadContext->sync.audioRequiredCond);
 
+#ifndef _WIN32
+	sigset_t signals;
+	sigemptyset(&signals);
+	sigaddset(&signals, SIGINT);
+	sigaddset(&signals, SIGTRAP);
+	pthread_sigmask(SIG_BLOCK, &signals, 0);
+#endif
+
 	MutexLock(&threadContext->stateMutex);
 	ThreadCreate(&threadContext->thread, _GBAThreadRun, threadContext);
 	while (threadContext->state < THREAD_RUNNING) {

src/platform/sdl/gl-main.c

@@ -56,14 +56,6 @@ int main(int argc, char** argv) {
 		return 1;
 	}
 
-#ifndef _WIN32
-	sigset_t signals;
-	sigemptyset(&signals);
-	sigaddset(&signals, SIGINT);
-	sigaddset(&signals, SIGTRAP);
-	pthread_sigmask(SIG_BLOCK, &signals, 0);
-#endif
-
 	struct GBAThread context;
 	struct GLSoftwareRenderer renderer;
 	GBAVideoSoftwareRendererCreate(&renderer.d);