diff options
Diffstat (limited to 'absl/debugging')
| -rw-r--r-- | absl/debugging/BUILD.bazel | 32 | ||||
| -rw-r--r-- | absl/debugging/CMakeLists.txt | 28 | ||||
| -rw-r--r-- | absl/debugging/failure_signal_handler.cc | 351 | ||||
| -rw-r--r-- | absl/debugging/failure_signal_handler.h | 103 | ||||
| -rw-r--r-- | absl/debugging/failure_signal_handler_test.cc | 146 |
5 files changed, 660 insertions, 0 deletions
diff --git a/absl/debugging/BUILD.bazel b/absl/debugging/BUILD.bazel index 556bb38394c9..e1e7fced69fb 100644 --- a/absl/debugging/BUILD.bazel +++ b/absl/debugging/BUILD.bazel @@ -95,6 +95,38 @@ cc_library( ) cc_library( + name = "failure_signal_handler", + srcs = ["failure_signal_handler.cc"], + hdrs = ["failure_signal_handler.h"], + copts = ABSL_DEFAULT_COPTS, + deps = [ + ":examine_stack", + ":stacktrace", + "//absl/base", + "//absl/base:config", + "//absl/base:core_headers", + ], +) + +cc_test( + name = "failure_signal_handler_test", + srcs = ["failure_signal_handler_test.cc"], + copts = ABSL_TEST_COPTS, + linkopts = select({ + "//absl:windows": [], + "//conditions:default": ["-pthread"], + }), + deps = [ + ":failure_signal_handler", + ":stacktrace", + ":symbolize", + "//absl/base", + "//absl/strings", + "@com_google_googletest//:gtest", + ], +) + +cc_library( name = "debugging_internal", srcs = [ "internal/address_is_readable.cc", diff --git a/absl/debugging/CMakeLists.txt b/absl/debugging/CMakeLists.txt index 456d07271b82..03a0a617e2ec 100644 --- a/absl/debugging/CMakeLists.txt +++ b/absl/debugging/CMakeLists.txt @@ -15,6 +15,7 @@ # list(APPEND DEBUGGING_PUBLIC_HEADERS + "failure_signal_handler.h" "leak_check.h" "stacktrace.h" "symbolize.h" @@ -51,6 +52,11 @@ list(APPEND SYMBOLIZE_SRC ${DEBUGGING_INTERNAL_HEADERS} ) +list(APPEND FAILURE_SIGNAL_HANDLER_SRC + "failure_signal_handler.cc" + ${DEBUGGING_PUBLIC_HEADERS} +) + list(APPEND EXAMINE_STACK_SRC "internal/examine_stack.cc" ${DEBUGGING_PUBLIC_HEADERS} @@ -75,6 +81,17 @@ absl_library( symbolize ) +absl_library( + TARGET + absl_failure_signal_handler + SOURCES + ${FAILURE_SIGNAL_HANDLER_SRC} + PUBLIC_LIBRARIES + absl_base absl_synchronization + EXPORT_NAME + failure_signal_handler +) + # Internal-only. Projects external to Abseil should not depend # directly on this library. absl_library( @@ -163,6 +180,17 @@ absl_test( absl_symbolize absl_stack_consumption ) +list(APPEND FAILURE_SIGNAL_HANDLER_TEST_SRC "failure_signal_handler_test.cc") + +absl_test( + TARGET + failure_signal_handler_test + SOURCES + ${FAILURE_SIGNAL_HANDLER_TEST_SRC} + PUBLIC_LIBRARIES + absl_examine_stack absl_stacktrace absl_symbolize +) + # test leak_check_test list(APPEND LEAK_CHECK_TEST_SRC "leak_check_test.cc") diff --git a/absl/debugging/failure_signal_handler.cc b/absl/debugging/failure_signal_handler.cc new file mode 100644 index 000000000000..597ad1445b29 --- /dev/null +++ b/absl/debugging/failure_signal_handler.cc @@ -0,0 +1,351 @@ +// +// Copyright 2018 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// + +#include "absl/debugging/failure_signal_handler.h" + +#include "absl/base/config.h" + +#ifdef _WIN32 +#include <windows.h> +#else +#include <unistd.h> +#endif + +#ifdef ABSL_HAVE_MMAP +#include <sys/mman.h> +#endif + +#include <algorithm> +#include <atomic> +#include <cerrno> +#include <csignal> +#include <cstring> +#include <ctime> + +#include "absl/base/attributes.h" +#include "absl/base/internal/raw_logging.h" +#include "absl/base/internal/sysinfo.h" +#include "absl/debugging/internal/examine_stack.h" +#include "absl/debugging/stacktrace.h" + +#ifndef _WIN32 +#define ABSL_HAVE_SIGACTION +#endif + +namespace absl { + +ABSL_CONST_INIT static FailureSignalHandlerOptions fsh_options; + +// Resets the signal handler for signo to the default action for that +// signal, then raises the signal. +static void RaiseToDefaultHandler(int signo) { + signal(signo, SIG_DFL); + raise(signo); +} + +struct FailureSignalData { + const int signo; + const char* const as_string; +#ifdef ABSL_HAVE_SIGACTION + struct sigaction previous_action; + // StructSigaction is used to silence -Wmissing-field-initializers. + using StructSigaction = struct sigaction; + #define FSD_PREVIOUS_INIT FailureSignalData::StructSigaction() +#else + void (*previous_handler)(int); + #define FSD_PREVIOUS_INIT SIG_DFL +#endif +}; + +ABSL_CONST_INIT static FailureSignalData failure_signal_data[] = { + {SIGSEGV, "SIGSEGV", FSD_PREVIOUS_INIT}, + {SIGILL, "SIGILL", FSD_PREVIOUS_INIT}, + {SIGFPE, "SIGFPE", FSD_PREVIOUS_INIT}, + {SIGABRT, "SIGABRT", FSD_PREVIOUS_INIT}, + {SIGTERM, "SIGTERM", FSD_PREVIOUS_INIT}, +#ifndef _WIN32 + {SIGBUS, "SIGBUS", FSD_PREVIOUS_INIT}, + {SIGTRAP, "SIGTRAP", FSD_PREVIOUS_INIT}, +#endif +}; + +#undef FSD_PREVIOUS_INIT + +static void RaiseToPreviousHandler(int signo) { + // Search for the previous handler. + for (const auto& it : failure_signal_data) { + if (it.signo == signo) { +#ifdef ABSL_HAVE_SIGACTION + sigaction(signo, &it.previous_action, nullptr); +#else + signal(signo, it.previous_handler); +#endif + raise(signo); + return; + } + } + + // Not found, use the default handler. + RaiseToDefaultHandler(signo); +} + +namespace debugging_internal { + +const char* FailureSignalToString(int signo) { + for (const auto& it : failure_signal_data) { + if (it.signo == signo) { + return it.as_string; + } + } + return ""; +} + +} // namespace debugging_internal + +#ifndef _WIN32 + +static bool SetupAlternateStackOnce() { + const size_t page_mask = getpagesize() - 1; + size_t stack_size = (std::max(SIGSTKSZ, 65536) + page_mask) & ~page_mask; +#if defined(ADDRESS_SANITIZER) || defined(MEMORY_SANITIZER) || \ + defined(THREAD_SANITIZER) + // Account for sanitizer instrumentation requiring additional stack space. + stack_size *= 5; +#endif + + stack_t sigstk; + memset(&sigstk, 0, sizeof(sigstk)); + sigstk.ss_size = stack_size; + +#ifdef ABSL_HAVE_MMAP +#ifndef MAP_STACK +#define MAP_STACK 0 +#endif + sigstk.ss_sp = mmap(nullptr, sigstk.ss_size, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0); + if (sigstk.ss_sp == MAP_FAILED) { + ABSL_RAW_LOG(FATAL, "mmap() for alternate signal stack failed"); + } +#else + sigstk.ss_sp = malloc(sigstk.ss_size); + if (sigstk.ss_sp == nullptr) { + ABSL_RAW_LOG(FATAL, "malloc() for alternate signal stack failed"); + } +#endif + + if (sigaltstack(&sigstk, nullptr) != 0) { + ABSL_RAW_LOG(FATAL, "sigaltstack() failed with errno=%d", errno); + } + return true; +} + +#endif + +// Sets up an alternate stack for signal handlers once. +// Returns the appropriate flag for sig_action.sa_flags +// if the system supports using an alternate stack. +static int MaybeSetupAlternateStack() { +#ifndef _WIN32 + ABSL_ATTRIBUTE_UNUSED static const bool kOnce = SetupAlternateStackOnce(); + return SA_ONSTACK; +#endif + return 0; +} + +#ifdef ABSL_HAVE_SIGACTION + +static void InstallOneFailureHandler(FailureSignalData* data, + void (*handler)(int, siginfo_t*, void*)) { + struct sigaction act; + memset(&act, 0, sizeof(act)); + sigemptyset(&act.sa_mask); + act.sa_flags |= SA_SIGINFO; + // SA_NODEFER is required to handle SIGABRT from + // ImmediateAbortSignalHandler(). + act.sa_flags |= SA_NODEFER; + if (fsh_options.use_alternate_stack) { + act.sa_flags |= MaybeSetupAlternateStack(); + } + act.sa_sigaction = handler; + ABSL_RAW_CHECK(sigaction(data->signo, &act, &data->previous_action) == 0, + "sigaction() failed"); +} + +#else + +static void InstallOneFailureHandler(FailureSignalData* data, + void (*handler)(int)) { + data->previous_handler = signal(data->signo, handler); + ABSL_RAW_CHECK(data->previous_handler != SIG_ERR, "signal() failed"); +} + +#endif + +static void WriteToStderr(const char* data) { + int old_errno = errno; + absl::raw_logging_internal::SafeWriteToStderr(data, strlen(data)); + errno = old_errno; +} + +static void WriteSignalMessage(int signo, void (*writerfn)(const char*)) { + char buf[64]; + const char* const signal_string = + debugging_internal::FailureSignalToString(signo); + if (signal_string != nullptr && signal_string[0] != '\0') { + snprintf(buf, sizeof(buf), "*** %s received at time=%ld ***\n", + signal_string, + static_cast<long>(time(nullptr))); // NOLINT(runtime/int) + } else { + snprintf(buf, sizeof(buf), "*** Signal %d received at time=%ld ***\n", + signo, static_cast<long>(time(nullptr))); // NOLINT(runtime/int) + } + writerfn(buf); +} + +// `void*` might not be big enough to store `void(*)(const char*)`. +struct WriterFnStruct { + void (*writerfn)(const char*); +}; + +// Many of the absl::debugging_internal::Dump* functions in +// examine_stack.h take a writer function pointer that has a void* arg +// for historical reasons. failure_signal_handler_writer only takes a +// data pointer. This function converts between these types. +static void WriterFnWrapper(const char* data, void* arg) { + static_cast<WriterFnStruct*>(arg)->writerfn(data); +} + +// Convenient wrapper around DumpPCAndFrameSizesAndStackTrace() for signal +// handlers. "noinline" so that GetStackFrames() skips the top-most stack +// frame for this function. +ABSL_ATTRIBUTE_NOINLINE static void WriteStackTrace( + void* ucontext, bool symbolize_stacktrace, + void (*writerfn)(const char*, void*), void* writerfn_arg) { + constexpr int kNumStackFrames = 32; + void* stack[kNumStackFrames]; + int frame_sizes[kNumStackFrames]; + int min_dropped_frames; + int depth = absl::GetStackFramesWithContext( + stack, frame_sizes, kNumStackFrames, + 1, // Do not include this function in stack trace. + ucontext, &min_dropped_frames); + absl::debugging_internal::DumpPCAndFrameSizesAndStackTrace( + absl::debugging_internal::GetProgramCounter(ucontext), stack, frame_sizes, + depth, min_dropped_frames, symbolize_stacktrace, writerfn, writerfn_arg); +} + +// Called by FailureSignalHandler() to write the failure info. It is +// called once with writerfn set to WriteToStderr() and then possibly +// with writerfn set to the user provided function. +static void WriteFailureInfo(int signo, void* ucontext, + void (*writerfn)(const char*)) { + WriterFnStruct writerfn_struct{writerfn}; + WriteSignalMessage(signo, writerfn); + WriteStackTrace(ucontext, fsh_options.symbolize_stacktrace, WriterFnWrapper, + &writerfn_struct); +} + +// absl::SleepFor() can't be used here since AbslInternalSleepFor() +// may be overridden to do something that isn't async-signal-safe on +// some platforms. +static void PortableSleepForSeconds(int seconds) { +#ifdef _WIN32 + Sleep(seconds * 1000); +#else + struct timespec sleep_time; + sleep_time.tv_sec = seconds; + sleep_time.tv_nsec = 0; + while (nanosleep(&sleep_time, &sleep_time) != 0 && errno == EINTR) {} +#endif +} + +#ifdef ABSL_HAVE_ALARM +// FailureSignalHandler() installs this as a signal handler for +// SIGALRM, then sets an alarm to be delivered to the program after a +// set amount of time. If FailureSignalHandler() hangs for more than +// the alarm timeout, ImmediateAbortSignalHandler() will abort the +// program. +static void ImmediateAbortSignalHandler(int) { + RaiseToDefaultHandler(SIGABRT); +} +#endif + +// absl::base_internal::GetTID() returns pid_t on most platforms, but +// returns absl::base_internal::pid_t on Windows. +using GetTidType = decltype(absl::base_internal::GetTID()); +ABSL_CONST_INIT static std::atomic<GetTidType> failed_tid(0); + +#ifndef ABSL_HAVE_SIGACTION +static void FailureSignalHandler(int signo) { + void* ucontext = nullptr; +#else +static void FailureSignalHandler(int signo, siginfo_t*, + void* ucontext) { +#endif + + const GetTidType this_tid = absl::base_internal::GetTID(); + GetTidType previous_failed_tid = 0; + if (!failed_tid.compare_exchange_strong( + previous_failed_tid, static_cast<intptr_t>(this_tid), + std::memory_order_acq_rel, std::memory_order_relaxed)) { + ABSL_RAW_LOG( + ERROR, + "Signal %d raised at PC=%p while already in FailureSignalHandler()", + signo, absl::debugging_internal::GetProgramCounter(ucontext)); + if (this_tid != previous_failed_tid) { + // Another thread is already in FailureSignalHandler(), so wait + // a bit for it to finish. If the other thread doesn't kill us, + // we do so after sleeping. + PortableSleepForSeconds(3); + RaiseToDefaultHandler(signo); + // The recursively raised signal may be blocked until we return. + return; + } + } + +#ifdef ABSL_HAVE_ALARM + // Set an alarm to abort the program in case this code hangs or deadlocks. + if (fsh_options.alarm_on_failure_secs > 0) { + alarm(0); // Cancel any existing alarms. + signal(SIGALRM, ImmediateAbortSignalHandler); + alarm(fsh_options.alarm_on_failure_secs); + } +#endif + + // First write to stderr. + WriteFailureInfo(signo, ucontext, WriteToStderr); + + // Riskier code (because it is less likely to be async-signal-safe) + // goes after this point. + if (fsh_options.writerfn != nullptr) { + WriteFailureInfo(signo, ucontext, fsh_options.writerfn); + } + + if (fsh_options.call_previous_handler) { + RaiseToPreviousHandler(signo); + } else { + RaiseToDefaultHandler(signo); + } +} + +void InstallFailureSignalHandler(const FailureSignalHandlerOptions& options) { + fsh_options = options; + for (auto& it : failure_signal_data) { + InstallOneFailureHandler(&it, FailureSignalHandler); + } +} + +} // namespace absl diff --git a/absl/debugging/failure_signal_handler.h b/absl/debugging/failure_signal_handler.h new file mode 100644 index 000000000000..17522f00b13f --- /dev/null +++ b/absl/debugging/failure_signal_handler.h @@ -0,0 +1,103 @@ +// +// Copyright 2018 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// + +// This module allows the programmer to install a signal handler that +// dumps useful debugging information (like a stacktrace) on program +// failure. To use this functionality, call +// absl::InstallFailureSignalHandler() very early in your program, +// usually in the first few lines of main(): +// +// int main(int argc, char** argv) { +// absl::InitializeSymbolizer(argv[0]); +// absl::FailureSignalHandlerOptions options; +// absl::InstallFailureSignalHandler(options); +// DoSomethingInteresting(); +// return 0; +// } + +#ifndef ABSL_DEBUGGING_FAILURE_SIGNAL_HANDLER_H_ +#define ABSL_DEBUGGING_FAILURE_SIGNAL_HANDLER_H_ + +namespace absl { + +// Options struct for absl::InstallFailureSignalHandler(). +struct FailureSignalHandlerOptions { + // If true, try to symbolize the stacktrace emitted on failure. + bool symbolize_stacktrace = true; + + // If true, try to run signal handlers on an alternate stack (if + // supported on the given platform). This is useful in the case + // where the program crashes due to a stack overflow. By running on + // a alternate stack, the signal handler might be able to run even + // when the normal stack space has been exausted. The downside of + // using an alternate stack is that extra memory for the alternate + // stack needs to be pre-allocated. + bool use_alternate_stack = true; + + // If positive, FailureSignalHandler() sets an alarm to be delivered + // to the program after this many seconds, which will immediately + // abort the program. This is useful in the potential case where + // FailureSignalHandler() itself is hung or deadlocked. + int alarm_on_failure_secs = 3; + + // If false, after absl::FailureSignalHandler() runs, the signal is + // raised to the default handler for that signal (which normally + // terminates the program). + // + // If true, after absl::FailureSignalHandler() runs, it will call + // the previously registered signal handler for the signal that was + // received (if one was registered). This can be used to chain + // signal handlers. + // + // IMPORTANT: If true, the chained fatal signal handlers must not + // try to recover from the fatal signal. Instead, they should + // terminate the program via some mechanism, like raising the + // default handler for the signal, or by calling _exit(). + // absl::FailureSignalHandler() may put parts of the Abseil + // library into a state that cannot be recovered from. + bool call_previous_handler = false; + + // If not null, this function may be called with a std::string argument + // containing failure data. This function is used as a hook to write + // the failure data to a secondary location, for instance, to a log + // file. This function may also be called with a null data + // argument. This is a hint that this is a good time to flush any + // buffered data before the program may be terminated. Consider + // flushing any buffered data in all calls to this function. + // + // Since this function runs in a signal handler, it should be + // async-signal-safe if possible. + // See http://man7.org/linux/man-pages/man7/signal-safety.7.html + void (*writerfn)(const char*) = nullptr; +}; + +// Installs a signal handler for the common failure signals SIGSEGV, +// SIGILL, SIGFPE, SIGABRT, SIGTERM, SIGBUG, and SIGTRAP (if they +// exist on the given platform). The signal handler dumps program +// failure data in a unspecified format to stderr. The data dumped by +// the signal handler includes information that may be useful in +// debugging the failure. This may include the program counter, a +// stacktrace, and register information on some systems. Do not rely +// on the exact format of the output; it is subject to change. +void InstallFailureSignalHandler(const FailureSignalHandlerOptions& options); + +namespace debugging_internal { +const char* FailureSignalToString(int signo); +} // namespace debugging_internal + +} // namespace absl + +#endif // ABSL_DEBUGGING_FAILURE_SIGNAL_HANDLER_H_ diff --git a/absl/debugging/failure_signal_handler_test.cc b/absl/debugging/failure_signal_handler_test.cc new file mode 100644 index 000000000000..33170dab192d --- /dev/null +++ b/absl/debugging/failure_signal_handler_test.cc @@ -0,0 +1,146 @@ +// +// Copyright 2018 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// + +#include "absl/debugging/failure_signal_handler.h" + +#include <csignal> +#include <cstdio> +#include <cstdlib> +#include <cstring> +#include <fstream> + +#include "gtest/gtest.h" +#include "absl/base/internal/raw_logging.h" +#include "absl/debugging/stacktrace.h" +#include "absl/debugging/symbolize.h" +#include "absl/strings/match.h" +#include "absl/strings/str_cat.h" + +namespace { + +#if GTEST_HAS_DEATH_TEST + +// For the parameterized death tests. GetParam() returns the signal number. +using FailureSignalHandlerDeathTest = ::testing::TestWithParam<int>; + +// This function runs in a fork()ed process on most systems. +void InstallHandlerAndRaise(int signo) { + absl::InstallFailureSignalHandler(absl::FailureSignalHandlerOptions()); + raise(signo); +} + +TEST_P(FailureSignalHandlerDeathTest, AbslFailureSignal) { + const int signo = GetParam(); + std::string exit_regex = absl::StrCat( + "\\*\\*\\* ", absl::debugging_internal::FailureSignalToString(signo), + " received at time="); +#ifndef _WIN32 + EXPECT_EXIT(InstallHandlerAndRaise(signo), testing::KilledBySignal(signo), + exit_regex); +#else + // Windows doesn't have testing::KilledBySignal(). + EXPECT_DEATH(InstallHandlerAndRaise(signo), exit_regex); +#endif +} + +ABSL_CONST_INIT FILE* error_file = nullptr; + +void WriteToErrorFile(const char* msg) { + if (msg != nullptr) { + ABSL_RAW_CHECK(fwrite(msg, strlen(msg), 1, error_file) == 1, + "fwrite() failed"); + } + ABSL_RAW_CHECK(fflush(error_file) == 0, "fflush() failed"); +} + +std::string GetTmpDir() { + // TEST_TMPDIR is set by Bazel. Try the others when not running under Bazel. + static const char* const kTmpEnvVars[] = {"TEST_TMPDIR", "TMPDIR", "TEMP", + "TEMPDIR", "TMP"}; + for (const char* const var : kTmpEnvVars) { + const char* tmp_dir = std::getenv(var); + if (tmp_dir != nullptr) { + return tmp_dir; + } + } + + // Try something reasonable. + return "/tmp"; +} + +// This function runs in a fork()ed process on most systems. +void InstallHandlerWithWriteToFileAndRaise(const char* file, int signo) { + error_file = fopen(file, "w"); + ABSL_RAW_CHECK(error_file != nullptr, "Failed create error_file"); + absl::FailureSignalHandlerOptions options; + options.writerfn = WriteToErrorFile; + absl::InstallFailureSignalHandler(options); + raise(signo); +} + +TEST_P(FailureSignalHandlerDeathTest, AbslFatalSignalsWithWriterFn) { + const int signo = GetParam(); + std::string tmp_dir = GetTmpDir(); + std::string file = absl::StrCat(tmp_dir, "/signo_", signo); + + std::string exit_regex = absl::StrCat( + "\\*\\*\\* ", absl::debugging_internal::FailureSignalToString(signo), + " received at time="); +#ifndef _WIN32 + EXPECT_EXIT(InstallHandlerWithWriteToFileAndRaise(file.c_str(), signo), + testing::KilledBySignal(signo), exit_regex); +#else + // Windows doesn't have testing::KilledBySignal(). + EXPECT_DEATH(InstallHandlerWithWriteToFileAndRaise(file.c_str(), signo), + exit_regex); +#endif + + // Open the file in this process and check its contents. + std::fstream error_output(file); + ASSERT_TRUE(error_output.is_open()) << file; + std::string error_line; + std::getline(error_output, error_line); + EXPECT_TRUE(absl::StartsWith( + error_line, + absl::StrCat("*** ", + absl::debugging_internal::FailureSignalToString(signo), + " received at "))); + + if (absl::debugging_internal::StackTraceWorksForTest()) { + std::getline(error_output, error_line); + EXPECT_TRUE(absl::StartsWith(error_line, "PC: ")); + } +} + +constexpr int kFailureSignals[] = { + SIGSEGV, SIGILL, SIGFPE, SIGABRT, SIGTERM, +#ifndef _WIN32 + SIGBUS, SIGTRAP, +#endif +}; + +INSTANTIATE_TEST_CASE_P(AbslDeathTest, FailureSignalHandlerDeathTest, + ::testing::ValuesIn(kFailureSignals)); + +#endif // GTEST_HAS_DEATH_TEST + +} // namespace + +int main(int argc, char** argv) { + absl::InitializeSymbolizer(argv[0]); + testing::InitGoogleTest(&argc, argv); + return RUN_ALL_TESTS(); +} |