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+// 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"
+
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string>
+#include "glog/logging.h"
+
+using namespace GOOGLE_NAMESPACE;
+
+void* DieInThread(void*) {
+ // 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. Hence we use C-style cast here, rather than
+ // reinterpret/static_cast, to support both types of environments.
+ fprintf(stderr, "0x%lx is dying\n", (long)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 NULL;
+}
+
+void WriteToStdout(const char* data, int 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 HAVE_LIB_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") {
+ pthread_t thread;
+ pthread_create(&thread, NULL, &DieInThread, NULL);
+ pthread_join(thread, NULL);
+ } else if (command == "dump_to_stdout") {
+ InstallFailureWriter(WriteToStdout);
+ abort();
+ } else {
+ // Tell the shell script
+ puts("OK");
+ }
+#endif
+ return 0;
+}