sanity-check for cpu thread

src/meta/debugger.c

@@ -1106,7 +1106,12 @@ static void begin_cpu_step()
    ------------------------------------------------------------------------- */
 bool c_debugger_should_break() {
 
-    // WARNING : this state management function should be called from CPU thread only!
+    if (pthread_self() != cpu_thread_id) {
+        // OOPS ...
+        ERRLOG("should only call this from cpu thread, bailing...");
+        void *ptr = NULL;
+        free(ptr);
+    }
 
     if (at_haltpt()) {
         stepping_struct.should_break = true;

src/misc.c

@@ -824,8 +824,7 @@ int main(int sargc, char *sargv[])
     c_initialize_firsttime();           /* init svga graphics and vm */
 
     // spin off cpu thread
-    pthread_t thread1;
-    pthread_create(&thread1, NULL, (void *) &cpu_thread, (void *)NULL);
+    pthread_create(&cpu_thread_id, NULL, (void *) &cpu_thread, (void *)NULL);
 
     // continue with main render thread
     main_thread(NULL);

src/timing.c

@@ -33,6 +33,7 @@ int gc_cycles_timer_0 = 0;
 int gc_cycles_timer_1 = 0;
 
 uint8_t emul_reinitialize;
+pthread_t cpu_thread_id = 0;
 
 static unsigned int g_nCyclesExecuted; // # of cycles executed up to last IO access
 
@@ -156,6 +157,9 @@ void timing_initialize()
 }
 
 void cpu_thread(void *dummyptr) {
+
+    assert(pthread_self() == cpu_thread_id);
+
     struct timespec deltat;
     struct timespec t0;         // the target timer
     struct timespec ti, tj;     // actual time samples

src/timing.h

@@ -45,6 +45,8 @@ extern int g_nCpuCyclesFeedback;
 extern double cpu_scale_factor;
 extern double cpu_altscale_factor;
 
+extern pthread_t cpu_thread_id;
+
 extern int gc_cycles_timer_0;
 extern int gc_cycles_timer_1;