158 lines
4.1 KiB
C++
158 lines
4.1 KiB
C++
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <android-base/unique_fd.h>
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#include <binder/IPCThreadState.h>
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#include <gtest/gtest.h>
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#include <poll.h>
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#include <trusty/metrics/metrics.h>
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#include <trusty/tipc.h>
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#define TIPC_DEV "/dev/trusty-ipc-dev0"
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#define CRASHER_PORT "com.android.trusty.metrics.test.crasher"
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namespace android {
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namespace trusty {
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namespace metrics {
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using android::base::unique_fd;
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static void TriggerCrash() {
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size_t num_retries = 6;
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int fd = -1;
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for (size_t i = 0; i < num_retries; i++) {
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/* It's possible to time out waiting for crasher TA to restart. */
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fd = tipc_connect(TIPC_DEV, CRASHER_PORT);
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if (fd >= 0) {
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break;
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}
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}
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unique_fd crasher(fd);
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ASSERT_GE(crasher, 0);
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int msg = 0;
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int rc = write(crasher, &msg, sizeof(msg));
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ASSERT_EQ(rc, sizeof(msg));
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}
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class TrustyMetricsTest : public TrustyMetrics, public ::testing::Test {
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public:
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TrustyMetricsTest() : TrustyMetrics(TIPC_DEV) {}
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virtual void HandleCrash(const std::string& app_id) override { crashed_app_ = app_id; }
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virtual void HandleEventDrop() override { event_drop_count_++; }
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virtual void SetUp() override {
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auto ret = Open();
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ASSERT_TRUE(ret.ok()) << ret.error();
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/* Drain events (if any) and reset state */
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DrainEvents();
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crashed_app_.clear();
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event_drop_count_ = 0;
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}
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void DrainEvents() {
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while (WaitForEvent(1000 /* 1 second timeout */).ok()) {
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auto ret = HandleEvent();
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ASSERT_TRUE(ret.ok()) << ret.error();
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}
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}
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void WaitForAndHandleEvent() {
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auto ret = WaitForEvent(30000 /* 30 second timeout */);
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ASSERT_TRUE(ret.ok()) << ret.error();
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ret = HandleEvent();
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ASSERT_TRUE(ret.ok()) << ret.error();
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}
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std::string crashed_app_;
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size_t event_drop_count_;
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};
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TEST_F(TrustyMetricsTest, Crash) {
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TriggerCrash();
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WaitForAndHandleEvent();
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/* Check that no event was dropped. */
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ASSERT_EQ(event_drop_count_, 0);
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/* Check that correct TA crashed. */
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ASSERT_EQ(crashed_app_, "36f5b435-5bd3-4526-8b76-200e3a7e79f3:crasher");
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}
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TEST_F(TrustyMetricsTest, PollSet) {
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int binder_fd;
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int rc = IPCThreadState::self()->setupPolling(&binder_fd);
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ASSERT_EQ(rc, 0);
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ASSERT_GE(binder_fd, 0);
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TriggerCrash();
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struct pollfd pfds[] = {
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{
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.fd = binder_fd,
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.events = POLLIN,
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},
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{
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.fd = GetRawFd(),
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.events = POLLIN,
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},
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};
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rc = poll(pfds, 2, 30000 /* 30 second timeout */);
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/* We expect one event on the metrics fd. */
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ASSERT_EQ(rc, 1);
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ASSERT_TRUE(pfds[1].revents & POLLIN);
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auto ret = HandleEvent();
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ASSERT_TRUE(ret.ok()) << ret.error();
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/* Check that no event was dropped. */
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ASSERT_EQ(event_drop_count_, 0);
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/* Check that correct TA crashed. */
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ASSERT_EQ(crashed_app_, "36f5b435-5bd3-4526-8b76-200e3a7e79f3:crasher");
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}
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TEST_F(TrustyMetricsTest, EventDrop) {
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/* We know the size of the internal event queue is less than this. */
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size_t num_events = 3;
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ASSERT_EQ(event_drop_count_, 0);
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for (auto i = 0; i < num_events; i++) {
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TriggerCrash();
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}
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for (auto i = 0; i < num_events; i++) {
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WaitForAndHandleEvent();
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if (event_drop_count_ > 0) {
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break;
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}
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}
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ASSERT_EQ(event_drop_count_, 1);
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}
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} // namespace metrics
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} // namespace trusty
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} // namespace android
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