diff options
Diffstat (limited to 'src/client/linux/handler/exception_handler_unittest.cc')
-rw-r--r-- | src/client/linux/handler/exception_handler_unittest.cc | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/src/client/linux/handler/exception_handler_unittest.cc b/src/client/linux/handler/exception_handler_unittest.cc index 6ad3661e..991c85a6 100644 --- a/src/client/linux/handler/exception_handler_unittest.cc +++ b/src/client/linux/handler/exception_handler_unittest.cc @@ -202,6 +202,180 @@ TEST(ExceptionHandlerTest, ChildCrashWithFD) { ASSERT_NO_FATAL_FAILURE(ChildCrash(true)); } +static bool DoneCallbackReturnFalse(const MinidumpDescriptor& descriptor, + void* context, + bool succeeded) { + return false; +} + +static bool DoneCallbackReturnTrue(const MinidumpDescriptor& descriptor, + void* context, + bool succeeded) { + return true; +} + +static bool DoneCallbackRaiseSIGKILL(const MinidumpDescriptor& descriptor, + void* context, + bool succeeded) { + raise(SIGKILL); +} + +static bool FilterCallbackReturnFalse(void* context) { + return false; +} + +static bool FilterCallbackReturnTrue(void* context) { + return true; +} + +// SIGKILL cannot be blocked and a handler cannot be installed for it. In the +// following tests, if the child dies with signal SIGKILL, then the signal was +// redelivered to this handler. If the child dies with SIGSEGV then it wasn't. +static void RaiseSIGKILL(int sig) { + raise(SIGKILL); +} + +static bool InstallRaiseSIGKILL() { + struct sigaction sa; + memset(&sa, 0, sizeof(sa)); + sa.sa_handler = RaiseSIGKILL; + return sigaction(SIGSEGV, &sa, NULL) != -1; +} + +static void CrashWithCallbacks(ExceptionHandler::FilterCallback filter, + ExceptionHandler::MinidumpCallback done, + string path) { + ExceptionHandler handler( + MinidumpDescriptor(path), filter, done, NULL, true, -1); + // Crash with the exception handler in scope. + *reinterpret_cast<volatile int*>(NULL) = 0; +} + +TEST(ExceptionHandlerTest, RedeliveryOnFilterCallbackFalse) { + AutoTempDir temp_dir; + + const pid_t child = fork(); + if (child == 0) { + ASSERT_TRUE(InstallRaiseSIGKILL()); + CrashWithCallbacks(FilterCallbackReturnFalse, NULL, temp_dir.path()); + } + + ASSERT_NO_FATAL_FAILURE(WaitForProcessToTerminate(child, SIGKILL)); +} + +TEST(ExceptionHandlerTest, RedeliveryOnDoneCallbackFalse) { + AutoTempDir temp_dir; + + const pid_t child = fork(); + if (child == 0) { + ASSERT_TRUE(InstallRaiseSIGKILL()); + CrashWithCallbacks(NULL, DoneCallbackReturnFalse, temp_dir.path()); + } + + ASSERT_NO_FATAL_FAILURE(WaitForProcessToTerminate(child, SIGKILL)); +} + +TEST(ExceptionHandlerTest, NoRedeliveryOnDoneCallbackTrue) { + AutoTempDir temp_dir; + + const pid_t child = fork(); + if (child == 0) { + ASSERT_TRUE(InstallRaiseSIGKILL()); + CrashWithCallbacks(NULL, DoneCallbackReturnTrue, temp_dir.path()); + } + + ASSERT_NO_FATAL_FAILURE(WaitForProcessToTerminate(child, SIGSEGV)); +} + +TEST(ExceptionHandlerTest, NoRedeliveryOnFilterCallbackTrue) { + AutoTempDir temp_dir; + + const pid_t child = fork(); + if (child == 0) { + ASSERT_TRUE(InstallRaiseSIGKILL()); + CrashWithCallbacks(FilterCallbackReturnTrue, NULL, temp_dir.path()); + } + + ASSERT_NO_FATAL_FAILURE(WaitForProcessToTerminate(child, SIGSEGV)); +} + +TEST(ExceptionHandlerTest, RedeliveryToDefaultHandler) { + AutoTempDir temp_dir; + + const pid_t child = fork(); + if (child == 0) { + CrashWithCallbacks(FilterCallbackReturnFalse, NULL, temp_dir.path()); + } + + // As RaiseSIGKILL wasn't installed, the redelivery should just kill the child + // with SIGSEGV. + ASSERT_NO_FATAL_FAILURE(WaitForProcessToTerminate(child, SIGSEGV)); +} + +TEST(ExceptionHandlerTest, StackedHandlersDeliveredToTop) { + AutoTempDir temp_dir; + + const pid_t child = fork(); + if (child == 0) { + ExceptionHandler bottom(MinidumpDescriptor(temp_dir.path()), + NULL, + NULL, + NULL, + true, + -1); + CrashWithCallbacks(NULL, DoneCallbackRaiseSIGKILL, temp_dir.path()); + } + ASSERT_NO_FATAL_FAILURE(WaitForProcessToTerminate(child, SIGKILL)); +} + +TEST(ExceptionHandlerTest, StackedHandlersNotDeliveredToBottom) { + AutoTempDir temp_dir; + + const pid_t child = fork(); + if (child == 0) { + ExceptionHandler bottom(MinidumpDescriptor(temp_dir.path()), + NULL, + DoneCallbackRaiseSIGKILL, + NULL, + true, + -1); + CrashWithCallbacks(NULL, NULL, temp_dir.path()); + } + ASSERT_NO_FATAL_FAILURE(WaitForProcessToTerminate(child, SIGSEGV)); +} + +TEST(ExceptionHandlerTest, StackedHandlersFilteredToBottom) { + AutoTempDir temp_dir; + + const pid_t child = fork(); + if (child == 0) { + ExceptionHandler bottom(MinidumpDescriptor(temp_dir.path()), + NULL, + DoneCallbackRaiseSIGKILL, + NULL, + true, + -1); + CrashWithCallbacks(FilterCallbackReturnFalse, NULL, temp_dir.path()); + } + ASSERT_NO_FATAL_FAILURE(WaitForProcessToTerminate(child, SIGKILL)); +} + +TEST(ExceptionHandlerTest, StackedHandlersUnhandledToBottom) { + AutoTempDir temp_dir; + + const pid_t child = fork(); + if (child == 0) { + ExceptionHandler bottom(MinidumpDescriptor(temp_dir.path()), + NULL, + DoneCallbackRaiseSIGKILL, + NULL, + true, + -1); + CrashWithCallbacks(NULL, DoneCallbackReturnFalse, temp_dir.path()); + } + ASSERT_NO_FATAL_FAILURE(WaitForProcessToTerminate(child, SIGKILL)); +} + // Test that memory around the instruction pointer is written // to the dump as a MinidumpMemoryRegion. TEST(ExceptionHandlerTest, InstructionPointerMemory) { |