| // Copyright (c) 2008, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| // |
| // Author: Satoru Takabayashi |
| // |
| // This is a helper binary for testing signalhandler.cc. The actual test |
| // is done in signalhandler_unittest.sh. |
| |
| #include "utilities.h" |
| |
| #if defined(HAVE_PTHREAD) |
| # include <pthread.h> |
| #endif |
| #include <csignal> |
| #include <cstdio> |
| #include <cstdlib> |
| #include <string> |
| |
| #include "glog/logging.h" |
| |
| #ifdef GLOG_USE_GFLAGS |
| # include <gflags/gflags.h> |
| using namespace GFLAGS_NAMESPACE; |
| #endif |
| |
| using namespace google; |
| |
| static void* DieInThread(void* /*unused*/) { |
| // We assume pthread_t is an integral number or a pointer, rather |
| // than a complex struct. In some environments, pthread_self() |
| // returns an uint64 but in some other environments pthread_self() |
| // returns a pointer. |
| fprintf( |
| stderr, "0x%px is dying\n", |
| static_cast<const void*>(reinterpret_cast<const char*>(pthread_self()))); |
| // Use volatile to prevent from these to be optimized away. |
| volatile int a = 0; |
| volatile int b = 1 / a; |
| fprintf(stderr, "We should have died: b=%d\n", b); |
| return nullptr; |
| } |
| |
| static void WriteToStdout(const char* data, size_t size) { |
| if (write(STDOUT_FILENO, data, size) < 0) { |
| // Ignore errors. |
| } |
| } |
| |
| int main(int argc, char** argv) { |
| #if defined(HAVE_STACKTRACE) && defined(HAVE_SYMBOLIZE) |
| InitGoogleLogging(argv[0]); |
| # ifdef GLOG_USE_GFLAGS |
| ParseCommandLineFlags(&argc, &argv, true); |
| # endif |
| InstallFailureSignalHandler(); |
| const std::string command = argc > 1 ? argv[1] : "none"; |
| if (command == "segv") { |
| // We'll check if this is outputted. |
| LOG(INFO) << "create the log file"; |
| LOG(INFO) << "a message before segv"; |
| // We assume 0xDEAD is not writable. |
| int* a = (int*)0xDEAD; |
| *a = 0; |
| } else if (command == "loop") { |
| fprintf(stderr, "looping\n"); |
| while (true) { |
| ; |
| } |
| } else if (command == "die_in_thread") { |
| # if defined(HAVE_PTHREAD) |
| pthread_t thread; |
| pthread_create(&thread, nullptr, &DieInThread, nullptr); |
| pthread_join(thread, nullptr); |
| # else |
| fprintf(stderr, "no pthread\n"); |
| return 1; |
| # endif |
| } else if (command == "dump_to_stdout") { |
| InstallFailureWriter(WriteToStdout); |
| abort(); |
| } else if (command == "installed") { |
| fprintf(stderr, "signal handler installed: %s\n", |
| IsFailureSignalHandlerInstalled() ? "true" : "false"); |
| } else { |
| // Tell the shell script |
| puts("OK"); |
| } |
| #endif |
| return 0; |
| } |