Get android running its sandbox in a seprate, isolated service process. So that we support not extracting the native code from the APK, so that we support distributing as an .aab file, so that we may one day release on the app store.

src/main.c

@@ -607,14 +607,16 @@ static int _tf_command_run(const char* file, int argc, char* argv[])
 static int _tf_command_sandbox(const char* file, int argc, char* argv[])
 {
 	bool show_usage = false;
+	int fd = STDIN_FILENO;
 
 	while (!show_usage)
 	{
 		static const struct option k_options[] = {
+			{ "fd", required_argument, NULL, 'f' },
 			{ "help", no_argument, NULL, 'h' },
 			{ 0 },
 		};
-		int c = getopt_long(argc, argv, "h", k_options, NULL);
+		int c = getopt_long(argc, argv, "f:h", k_options, NULL);
 		if (c == -1)
 		{
 			break;
@@ -626,6 +628,10 @@ static int _tf_command_sandbox(const char* file, int argc, char* argv[])
 		default:
 			show_usage = true;
 			break;
+		case 'f':
+			tf_printf("got -f %s\n", optarg);
+			fd = atoi(optarg);
+			break;
 		}
 	}
 
@@ -634,6 +640,7 @@ static int _tf_command_sandbox(const char* file, int argc, char* argv[])
 		tf_printf("\nUsage: %s sandbox [options]\n\n", file);
 		tf_printf("options:\n");
 		tf_printf("  -h, --help    Show this usage information.\n");
+		tf_printf("  -f, --fd      File descriptor with which to communicate with parent process.\n");
 		return EXIT_FAILURE;
 	}
 
@@ -641,7 +648,7 @@ static int _tf_command_sandbox(const char* file, int argc, char* argv[])
 	prctl(PR_SET_PDEATHSIG, SIGHUP);
 #endif
 	tf_task_t* task = tf_task_create();
-	tf_task_configure_from_fd(task, STDIN_FILENO);
+	tf_task_configure_from_fd(task, fd);
 	_shed_privileges();
 	/* The caller will trigger tf_task_activate with a message. */
 	tf_task_run(task);
@@ -689,10 +696,6 @@ static void _startup(int argc, char* argv[])
 		}
 	}
 
-#if defined(__ANDROID__)
-	setenv("UV_USE_IO_URING", "0", 1);
-#endif
-
 	tf_mem_startup(tracking);
 	g_backtrace_state = backtrace_create_state(argv[0], 0, _backtrace_error, NULL);
 
@@ -720,7 +723,7 @@ static void _startup(int argc, char* argv[])
 	{
 		if (
 #if !defined(_WIN32)
-			signal(SIGSYS, _error_handler) == SIG_ERR ||
+			signal(SIGSYS, _error_handler) == SIG_ERR || signal(SIGABRT, _error_handler) == SIG_ERR ||
 #endif
 			signal(SIGSEGV, _error_handler) == SIG_ERR)
 		{
@@ -730,8 +733,28 @@ static void _startup(int argc, char* argv[])
 }
 
 #if defined(__ANDROID__)
+static JNIEnv* s_jni_env;
+
+static void _tf_service_start(int pipe_fd)
+{
+	tf_printf("_tf_service_start\n");
+	jclass c = (*s_jni_env)->FindClass(s_jni_env, "com/unprompted/tildefriends/TildeFriendsActivity");
+	jmethodID start_sandbox = (*s_jni_env)->GetStaticMethodID(s_jni_env, c, "start_sandbox", "(I)V");
+	(*s_jni_env)->CallStaticVoidMethod(s_jni_env, c, start_sandbox, pipe_fd);
+}
+
+static void _tf_service_stop()
+{
+	tf_printf("_tf_service_stop\n");
+	jclass c = (*s_jni_env)->FindClass(s_jni_env, "com/unprompted/tildefriends/TildeFriendsActivity");
+	jmethodID stop_sandbox = (*s_jni_env)->GetStaticMethodID(s_jni_env, c, "stop_sandbox", "()V");
+	(*s_jni_env)->CallStaticVoidMethod(s_jni_env, c, stop_sandbox);
+}
+
 static jint _tf_server_main(JNIEnv* env, jobject this_object, jstring files_dir, jstring apk_path, jstring out_port_file_path)
 {
+	s_jni_env = env;
+
 	tf_printf("This is tf_server_main main.\n");
 	_startup(0, (char*[]) { NULL });
 	tf_printf("That was startup.\n");
@@ -754,24 +777,51 @@ static jint _tf_server_main(JNIEnv* env, jobject this_object, jstring files_dir,
 	char* port_file_arg = alloca(port_file_arg_length);
 	snprintf(port_file_arg, port_file_arg_length, "out_http_port_file=%s", out_port_file);
 
-	const char* args[] =
-	{
+	const char* args[] = {
+		"run",
 		"-z",
 		apk,
 		"-a",
 		port_file_arg,
 		"-p",
 		"0",
-		"-o", /* HACK!  FIXME! */
 	};
 
+	tf_task_set_android_service_callbacks(_tf_service_start, _tf_service_stop);
 	result = _tf_command_run(apk, _countof(args), (char**)args);
+	tf_task_set_android_service_callbacks(NULL, NULL);
 
 	(*env)->ReleaseStringUTFChars(env, files_dir, files);
 	(*env)->ReleaseStringUTFChars(env, apk_path, apk);
 	(*env)->ReleaseStringUTFChars(env, out_port_file_path, out_port_file);
 
 	tf_printf("tf_server_main finished with %d.", result);
+
+	s_jni_env = NULL;
+	return result;
+}
+
+static jint _tf_sandbox_main(JNIEnv* env, jobject this_object, int pipe_fd)
+{
+	s_jni_env = env;
+
+	tf_printf("This is tf_sandbox_main main (fd=%d).\n", pipe_fd);
+	_startup(0, (char*[]) { NULL });
+	tf_printf("That was startup.\n");
+
+	char fd[32] = { 0 };
+	snprintf(fd, sizeof(fd), "%d", pipe_fd);
+	const char* args[] = {
+		"sandbox",
+		"-f",
+		fd,
+	};
+
+	int result = _tf_command_sandbox(NULL, _countof(args), (char**)args);
+
+	tf_printf("tf_sandbox_main finished with %d.", result);
+
+	s_jni_env = NULL;
 	return result;
 }
 
@@ -796,6 +846,7 @@ JNIEXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved)
 	tf_printf("Registering method.\n");
 	static const JNINativeMethod methods[] = {
 		{ "tf_server_main", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)I", _tf_server_main },
+		{ "tf_sandbox_main", "(I)I", _tf_sandbox_main },
 	};
 	int result = (*env)->RegisterNatives(env, c, methods, (int)_countof(methods));
 	if (result != JNI_OK)