05d26211d8
When there is an error detected, the code runs forever and then times out without any indication of what happened. Change it so that error messages are printed and the test fails. Change-Id: Id3160fc2f394984de0157356594fd8b40de66b4a
120 lines
3.4 KiB
C++
120 lines
3.4 KiB
C++
/*
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* Copyright (C) 2013 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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/*
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* Contributed by: Intel Corporation
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*/
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#include <gtest/gtest.h>
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#include <dlfcn.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <unwind.h>
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#include "ScopedSignalHandler.h"
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#define noinline __attribute__((__noinline__))
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#define __unused __attribute__((__unused__))
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static _Unwind_Reason_Code FrameCounter(_Unwind_Context* ctx __unused, void* arg) {
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int* count_ptr = reinterpret_cast<int*>(arg);
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#if SHOW_FRAME_LOCATIONS
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void* ip = reinterpret_cast<void*>(_Unwind_GetIP(ctx));
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const char* symbol = "<unknown>";
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int offset = 0;
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Dl_info info;
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memset(&info, 0, sizeof(info));
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if (dladdr(ip, &info) != 0) {
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symbol = info.dli_sname;
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if (info.dli_saddr != nullptr) {
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offset = static_cast<int>(reinterpret_cast<char*>(ip) - reinterpret_cast<char*>(info.dli_saddr));
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}
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}
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fprintf(stderr, " #%02d %p %s%+d (%s)\n", *count_ptr, ip, symbol, offset, info.dli_fname ? info.dli_fname : "??");
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fflush(stderr);
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#endif
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++*count_ptr;
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return _URC_NO_REASON;
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}
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static int noinline unwind_one_frame_deeper() {
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int count = 0;
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_Unwind_Backtrace(FrameCounter, &count);
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return count;
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}
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TEST(stack_unwinding, easy) {
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int count = 0;
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_Unwind_Backtrace(FrameCounter, &count);
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int deeper_count = unwind_one_frame_deeper();
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ASSERT_EQ(count + 1, deeper_count);
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}
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struct UnwindData {
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volatile bool signal_handler_complete = false;
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int expected_frame_count = 0;
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int handler_frame_count = 0;
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int handler_one_deeper_frame_count = 0;
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};
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static UnwindData g_unwind_data;
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static void noinline UnwindSignalHandler(int) {
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_Unwind_Backtrace(FrameCounter, &g_unwind_data.handler_frame_count);
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g_unwind_data.handler_one_deeper_frame_count = unwind_one_frame_deeper();
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g_unwind_data.signal_handler_complete = true;
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}
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static void verify_unwind_data(const UnwindData& unwind_data) {
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EXPECT_GT(unwind_data.handler_frame_count, unwind_data.expected_frame_count);
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EXPECT_EQ(unwind_data.handler_frame_count + 1, unwind_data.handler_one_deeper_frame_count);
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}
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TEST(stack_unwinding, unwind_through_signal_frame) {
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g_unwind_data = {};
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ScopedSignalHandler ssh(SIGUSR1, UnwindSignalHandler);
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_Unwind_Backtrace(FrameCounter, &g_unwind_data.expected_frame_count);
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ASSERT_EQ(0, kill(getpid(), SIGUSR1));
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while (!g_unwind_data.signal_handler_complete) {}
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verify_unwind_data(g_unwind_data);
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}
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// On LP32, the SA_SIGINFO flag gets you __restore_rt instead of __restore.
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TEST(stack_unwinding, unwind_through_signal_frame_SA_SIGINFO) {
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g_unwind_data = {};
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ScopedSignalHandler ssh(SIGUSR1, UnwindSignalHandler, SA_SIGINFO);
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_Unwind_Backtrace(FrameCounter, &g_unwind_data.expected_frame_count);
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ASSERT_EQ(0, kill(getpid(), SIGUSR1));
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while (!g_unwind_data.signal_handler_complete) {}
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verify_unwind_data(g_unwind_data);
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}
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