ab772110c7
We may as well check the entire log. The previous bump seems to have made this test less flaky, so why not go all the way? Change-Id: I26b7524731ec755b724b9363fc9151f6a6d9116d
105 lines
3.2 KiB
C++
105 lines
3.2 KiB
C++
/*
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* Copyright (C) 2022 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 <unistd.h>
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#include <thread>
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#include <android-base/test_utils.h>
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#include <android-base/threads.h>
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#include <gtest/gtest.h>
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#include <utils/CallStack.h>
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#if defined(__ANDROID__)
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#include <log/log.h>
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#include <log/log_read.h>
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#endif
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__attribute__((__noinline__)) extern "C" void CurrentCaller(android::String8& backtrace) {
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android::CallStack cs;
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cs.update();
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backtrace = cs.toString();
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}
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TEST(CallStackTest, current_backtrace) {
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android::String8 backtrace;
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CurrentCaller(backtrace);
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ASSERT_NE(-1, backtrace.find("(CurrentCaller")) << "Full backtrace:\n" << backtrace;
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}
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__attribute__((__noinline__)) extern "C" void ThreadBusyWait(std::atomic<pid_t>* tid,
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volatile bool* done) {
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*tid = android::base::GetThreadId();
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while (!*done) {
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}
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}
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TEST(CallStackTest, thread_backtrace) {
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// Use a volatile to avoid any problems unwinding since sometimes
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// accessing a std::atomic does not include unwind data at every
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// instruction and leads to failed unwinds.
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volatile bool done = false;
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std::atomic<pid_t> tid = -1;
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std::thread thread([&tid, &done]() { ThreadBusyWait(&tid, &done); });
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while (tid == -1) {
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}
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android::CallStack cs;
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cs.update(0, tid);
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done = true;
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thread.join();
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ASSERT_NE(-1, cs.toString().find("(ThreadBusyWait")) << "Full backtrace:\n" << cs.toString();
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}
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#if defined(__ANDROID__)
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TEST(CallStackTest, log_stack) {
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android::CallStack::logStack("callstack_test");
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auto logger_list = android_logger_list_open(android_name_to_log_id("main"),
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ANDROID_LOG_NONBLOCK,
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INT_MAX /* tail */, getpid());
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ASSERT_NE(nullptr, logger_list);
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std::string log;
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while (true) {
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log_msg log_msg;
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auto ret = android_logger_list_read(logger_list, &log_msg);
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if (ret == -EAGAIN) {
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break;
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}
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ASSERT_GT(ret, 0);
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if (log_msg.msg() == nullptr) {
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continue;
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}
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// First get the tag.
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char* msg = &log_msg.msg()[1];
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if (std::string(msg) != "callstack_test") {
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continue;
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}
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// Now move past the tag.
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msg = &msg[strlen(msg) + 1];
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log += msg;
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log += '\n';
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}
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ASSERT_NE("", log) << "No messages found in the log from the test.";
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// Look for a backtrace line such as:
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// #00 pc 00000000000536e4 libutils_test (testing::Test::Run()+436)
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ASSERT_MATCH(log, "#\\d+ pc \\d+");
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android_logger_list_close(logger_list);
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}
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#endif
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