/thirdparty/breakpad/third_party/glog/src/signalhandler_unittest.cc

http://github.com/tomahawk-player/tomahawk · C++ · 97 lines · 48 code · 6 blank · 43 comment · 15 complexity · 1f3e7fdcec61bee65b16e9c44c7cc50f MD5 · raw file

  1. // Copyright (c) 2008, Google Inc.
  2. // All rights reserved.
  3. //
  4. // Redistribution and use in source and binary forms, with or without
  5. // modification, are permitted provided that the following conditions are
  6. // met:
  7. //
  8. // * Redistributions of source code must retain the above copyright
  9. // notice, this list of conditions and the following disclaimer.
  10. // * Redistributions in binary form must reproduce the above
  11. // copyright notice, this list of conditions and the following disclaimer
  12. // in the documentation and/or other materials provided with the
  13. // distribution.
  14. // * Neither the name of Google Inc. nor the names of its
  15. // contributors may be used to endorse or promote products derived from
  16. // this software without specific prior written permission.
  17. //
  18. // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19. // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20. // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21. // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22. // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23. // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24. // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25. // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26. // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27. // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28. // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29. //
  30. // Author: Satoru Takabayashi
  31. //
  32. // This is a helper binary for testing signalhandler.cc. The actual test
  33. // is done in signalhandler_unittest.sh.
  34. #include "utilities.h"
  35. #include <pthread.h>
  36. #include <signal.h>
  37. #include <stdio.h>
  38. #include <stdlib.h>
  39. #include <string>
  40. #include "glog/logging.h"
  41. using namespace GOOGLE_NAMESPACE;
  42. void* DieInThread(void*) {
  43. // We assume pthread_t is an integral number or a pointer, rather
  44. // than a complex struct. In some environments, pthread_self()
  45. // returns an uint64 but in some other environments pthread_self()
  46. // returns a pointer. Hence we use C-style cast here, rather than
  47. // reinterpret/static_cast, to support both types of environments.
  48. fprintf(stderr, "0x%lx is dying\n", (long)pthread_self());
  49. // Use volatile to prevent from these to be optimized away.
  50. volatile int a = 0;
  51. volatile int b = 1 / a;
  52. fprintf(stderr, "We should have died: b=%d\n", b);
  53. return NULL;
  54. }
  55. void WriteToStdout(const char* data, int size) {
  56. if (write(STDOUT_FILENO, data, size) < 0) {
  57. // Ignore errors.
  58. }
  59. }
  60. int main(int argc, char **argv) {
  61. #if defined(HAVE_STACKTRACE) && defined(HAVE_SYMBOLIZE)
  62. InitGoogleLogging(argv[0]);
  63. #ifdef HAVE_LIB_GFLAGS
  64. ParseCommandLineFlags(&argc, &argv, true);
  65. #endif
  66. InstallFailureSignalHandler();
  67. const std::string command = argc > 1 ? argv[1] : "none";
  68. if (command == "segv") {
  69. // We'll check if this is outputted.
  70. LOG(INFO) << "create the log file";
  71. LOG(INFO) << "a message before segv";
  72. // We assume 0xDEAD is not writable.
  73. int *a = (int*)0xDEAD;
  74. *a = 0;
  75. } else if (command == "loop") {
  76. fprintf(stderr, "looping\n");
  77. while (true);
  78. } else if (command == "die_in_thread") {
  79. pthread_t thread;
  80. pthread_create(&thread, NULL, &DieInThread, NULL);
  81. pthread_join(thread, NULL);
  82. } else if (command == "dump_to_stdout") {
  83. InstallFailureWriter(WriteToStdout);
  84. abort();
  85. } else {
  86. // Tell the shell script
  87. puts("OK");
  88. }
  89. #endif
  90. return 0;
  91. }