am 5fb042dd: Merge "Expand crasher with a "thread-" prefix to crash on another thread."

* commit '5fb042dd3a04086c340801bc4fa0e3a0ed493e82':
  Expand crasher with a "thread-" prefix to crash on another thread.

debuggerd/crasher.c

@@ -20,6 +20,7 @@
 void crash1(void);
 void crashnostack(void);
 void maybeabort(void);
+int do_action(const char* arg);
 
 static void debuggerd_connect()
 {
@@ -74,24 +75,46 @@ int ctest()
     return 0;
 }
 
-int main(int argc, char **argv)
+static void* thread_callback(void* raw_arg)
 {
+    return (void*) do_action((const char*) raw_arg);
+}
+
+int do_action_on_thread(const char* arg)
+{
+    pthread_t t;
+    pthread_create(&t, NULL, thread_callback, (void*) arg);
+    void* result = NULL;
+    pthread_join(t, &result);
+    return (int) result;
+}
+
+int do_action(const char* arg)
+{
+    if(!strncmp(arg, "thread-", strlen("thread-"))) {
+        return do_action_on_thread(arg + strlen("thread-"));
+    }
+
+    if(!strcmp(arg,"nostack")) crashnostack();
+    if(!strcmp(arg,"ctest")) return ctest();
+    if(!strcmp(arg,"exit")) exit(1);
+    if(!strcmp(arg,"abort")) maybeabort();
+
     pthread_t thr;
     pthread_attr_t attr;
+    pthread_attr_init(&attr);
+    pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+    pthread_create(&thr, &attr, test_thread, 0);
+    while(1) sleep(1);
+}
 
-    fprintf(stderr,"crasher: " __TIME__ "!@\n");
+int main(int argc, char **argv)
+{
+    fprintf(stderr,"crasher: built at " __TIME__ "!@\n");
     fprintf(stderr,"crasher: init pid=%d tid=%d\n", getpid(), gettid());
 
     if(argc > 1) {
-        if(!strcmp(argv[1],"nostack")) crashnostack();
+        return do_action(argv[1]);
-        if(!strcmp(argv[1],"ctest")) return ctest();
-        if(!strcmp(argv[1],"exit")) exit(1);
-        if(!strcmp(argv[1],"abort")) maybeabort();
-        
-        pthread_attr_init(&attr);
-        pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
-        pthread_create(&thr, &attr, test_thread, 0);
-        while(1) sleep(1);
     } else {
         crash1();
 //        *((int*) 0) = 42;