Merge "Fix flaky signal tests." am: a5e0d695fa (8ae9c2d0) · Commits · e / os / android_system_core

libunwindstack/tests/UnwindTest.cpp

+15 −3

Original line number	Diff line number	Diff line
		@@ -47,6 +47,7 @@ namespace unwindstack {
		enum TestTypeEnum : uint8_t {
		TEST_TYPE_LOCAL_UNWINDER = 0,
		TEST_TYPE_LOCAL_UNWINDER_FROM_PID,
		TEST_TYPE_LOCAL_WAIT_FOR_FINISH,
		TEST_TYPE_REMOTE,
		TEST_TYPE_REMOTE_WITH_INVALID_CALL,
		};
		@@ -79,7 +80,10 @@ static void SignalHandler(int, siginfo_t, void sigcontext) {

		extern "C" void SignalInnerFunction() {
		g_signal_ready_for_remote = true;
		while (!g_finish.load()) {
		// Avoid any function calls because not every instruction will be
		// unwindable.
		// This method of looping is only used when testing a remote unwind.
		while (true) {
		}
		}

		@@ -134,6 +138,11 @@ static void VerifyUnwind(pid_t pid, Maps* maps, Regs* regs,
		// off. If this doesn't happen, then all of the calls will be optimized
		// away.
		extern "C" void InnerFunction(TestTypeEnum test_type) {
		if (test_type == TEST_TYPE_LOCAL_WAIT_FOR_FINISH) {
		while (!g_finish.load()) {
		}
		return;
		}
		if (test_type == TEST_TYPE_REMOTE \|\| test_type == TEST_TYPE_REMOTE_WITH_INVALID_CALL) {
		g_ready_for_remote = true;
		g_ready = true;
		@@ -141,7 +150,10 @@ extern "C" void InnerFunction(TestTypeEnum test_type) {
		void (*crash_func)() = nullptr;
		crash_func();
		}
		while (!g_finish.load()) {
		// Avoid any function calls because not every instruction will be
		// unwindable.
		// This method of looping is only used when testing a remote unwind.
		while (true) {
		}
		return;
		}
		@@ -271,7 +283,7 @@ TEST_F(UnwindTest, from_context) {
		std::atomic_int tid(0);
		std::thread thread([&]() {
		tid = syscall(__NR_gettid);
		OuterFunction(TEST_TYPE_REMOTE);
		OuterFunction(TEST_TYPE_LOCAL_WAIT_FOR_FINISH);
		});

		struct sigaction act, oldact;