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