mirror of
https://github.com/KjellKod/g3log.git
synced 2024-12-12 10:23:50 +01:00
Merge branch 'clang-improved-crash-handling' of https://github.com/KjellKod/g3log into clang-improved-crash-handling
Conflicts: Build.cmake example/main_fatal_choice.cpp
This commit is contained in:
commit
a8d89b67c8
@ -85,9 +85,6 @@ ENDIF()
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add_library(g3logger_shared SHARED ${SRC_FILES})
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set_target_properties(g3logger_shared PROPERTIES LINKER_LANGUAGE CXX)
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IF(APPLE)
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set_target_properties(g3logger_shared PROPERTIES MACOSX_RPATH TRUE)
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ENDIF(APPLE)
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target_link_libraries(g3logger_shared ${PLATFORM_LINK_LIBRIES})
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SET(G3LOG_SHARED_LIBRARY g3logger_shared)
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@ -16,6 +16,7 @@
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#include <string>
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#include <chrono>
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#include <thread>
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#include <exception>
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namespace
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@ -34,34 +35,34 @@ namespace
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}
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void RaiseSIGABRT() {
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std::cout << "Calling :" << __FUNCTION__ << " Line: " << __LINE__ << std::endl << std::flush;
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raise(SIGABRT);
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LOG(DEBUG) << " trigger exit";
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LOG(WARNING) << "Expected to have died by now...";
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}
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void RaiseSIGFPE() {
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std::cout << "Calling :" << __FUNCTION__ << " Line: " << __LINE__ << std::endl << std::flush;
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LOG(DEBUG) << " trigger exit";
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LOGF_IF(INFO, (false != true), "Exiting %s SIGFPE", "by");
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raise(SIGFPE);
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LOG(WARNING) << "Expected to have died by now...";
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}
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void RaiseSIGSEGV() {
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std::cout << "Calling :" << __FUNCTION__ << " Line: " << __LINE__ << std::endl << std::flush;
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LOG(DEBUG) << " trigger exit";
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LOG(DEBUG) << "Exit by SIGSEGV";
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raise(SIGSEGV);
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LOG(WARNING) << "Expected to have died by now...";
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}
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void RaiseSIGILL() {
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std::cout << "Calling :" << __FUNCTION__ << " Line: " << __LINE__ << std::endl << std::flush;
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LOG(DEBUG) << " trigger exit";
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LOGF(DEBUG, "Exit by %s", "SIGILL");
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raise(SIGILL);
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LOG(WARNING) << "Expected to have died by now...";
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}
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void RAiseSIGTERM() {
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std::cout << "Calling :" << __FUNCTION__ << " Line: " << __LINE__ << std::endl << std::flush;
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LOG(DEBUG) << " trigger exit";
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LOGF_IF(INFO, (false != true), "Exiting %s SIGFPE", "by");
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raise(SIGTERM);
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LOG(WARNING) << "Expected to have died by now...";
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@ -69,8 +70,7 @@ namespace
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int gShouldBeZero = 1;
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void DivisionByZero() {
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std::cout << "Calling :" << __FUNCTION__ << " Line: " << __LINE__ << std::endl << std::flush;
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std::cout << "Executing DivisionByZero: gShouldBeZero: " << gShouldBeZero << std::endl;
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LOG(DEBUG) << " trigger exit Executing DivisionByZero: gShouldBeZero: " << gShouldBeZero;
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LOG(INFO) << "Division by zero is a big no-no";
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int value = 3;
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auto test = value / gShouldBeZero;
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@ -78,14 +78,14 @@ namespace
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}
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void IllegalPrintf() {
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std::cout << "Calling :" << __FUNCTION__ << " Line: " << __LINE__ << std::endl << std::flush;
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LOG(DEBUG) << " trigger exit";
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LOG(DEBUG) << "Impending doom due to illeteracy";
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LOGF(INFO, "2nd attempt at ILLEGAL PRINTF_SYNTAX %d EXAMPLE. %s %s", "hello", 1);
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LOG(WARNING) << "Expected to have died by now...";
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}
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void OutOfBoundsArrayIndexing() {
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std::cout << "Calling :" << __FUNCTION__ << " Line: " << __LINE__ << std::endl << std::flush;
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LOG(DEBUG) << " trigger exit";
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std::vector<int> v;
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v[0] = 5;
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LOG(WARNING) << "Expected to have died by now...";
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@ -93,7 +93,7 @@ namespace
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void AccessViolation() {
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std::cout << "Calling :" << __FUNCTION__ << " Line: " << __LINE__ << std::endl << std::flush;
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LOG(DEBUG) << " trigger exit";
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char *ptr = 0;
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LOG(INFO) << "Death by access violation is imminent";
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*ptr = 0;
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@ -101,12 +101,12 @@ namespace
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}
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void NoExitFunction() {
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std::cout << "Calling :" << __FUNCTION__ << " Line: " << __LINE__ << std::endl << std::flush;
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LOG(DEBUG) << " trigger exit";
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CHECK(false) << "This function should never be called";
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}
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void RaiseSIGABRTAndAccessViolation() {
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std::cout << "Calling :" << __FUNCTION__ << " Line: " << __LINE__ << std::endl << std::flush;
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LOG(DEBUG) << " trigger exit";
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auto f1 = std::async(std::launch::async, &RaiseSIGABRT);
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auto f2 = std::async(std::launch::async, &AccessViolation);
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@ -114,11 +114,44 @@ namespace
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f2.wait();
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}
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void ThrowInt() {
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throw 1233210;
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using deathfunc = void (*) (void);
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void Death_x10000(deathfunc func, std::string funcname) noexcept {
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LOG(DEBUG) << " trigger exit";
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std::vector<std::future<void>> asyncs;
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asyncs.reserve(10000);
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for (auto idx = 0; idx < 10000; ++idx) {
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asyncs.push_back(std::async(std::launch::async, func));
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}
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for (const auto& a : asyncs) {
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a.wait();
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}
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std::cout << __FUNCTION__ << " unexpected result. Death by " << funcname << " did not crash and exit the system" << std::endl;
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}
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void Throw() noexcept {
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LOG(DEBUG) << " trigger exit";
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std::future<int> empty;
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empty.get();
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// --> thows future_error http://en.cppreference.com/w/cpp/thread/future_error
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// example of std::exceptions can be found here: http://en.cppreference.com/w/cpp/error/exception
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}
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void SegFaultAttempt_x10000() noexcept {
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deathfunc f = []{Throw(); *(char*)0 = 0; char* ptr = 0; *ptr = 1; AccessViolation();};
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Death_x10000(f, "throw uncaught exception... and then some sigsegv calls");
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}
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void AccessViolation_x10000() {
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Death_x10000(&AccessViolation, "AccessViolation");
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}
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void FailedCHECK() {
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LOG(DEBUG) << " trigger exit";
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CHECK(false) << "This is fatal";
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}
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@ -133,7 +166,8 @@ namespace
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void ExecuteDeathFunction(const bool runInNewThread, int fatalChoice) {
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std::cout << "Calling :" << __FUNCTION__ << " Line: " << __LINE__ << std::endl << std::flush;
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LOG(DEBUG) << "trigger exit";
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auto exitFunction = &NoExitFunction;
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switch (fatalChoice) {
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case 1: exitFunction = &RaiseSIGABRT; break;
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@ -146,8 +180,10 @@ namespace
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case 8: exitFunction = &OutOfBoundsArrayIndexing; break;
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case 9: exitFunction = &AccessViolation; break;
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case 10: exitFunction = &RaiseSIGABRTAndAccessViolation; break;
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case 11: exitFunction = &ThrowInt; break;
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case 11: exitFunction = &Throw; break;
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case 12: exitFunction = &FailedCHECK; break;
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case 13: exitFunction = &AccessViolation_x10000; break;
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case 14: exitFunction = &SegFaultAttempt_x10000; break;
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default: break;
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}
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if (runInNewThread) {
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@ -203,16 +239,17 @@ namespace
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std::cout << "[8] Out of bounds array indexing " << std::endl;
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std::cout << "[9] Access violation" << std::endl;
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std::cout << "[10] Rasing SIGABRT + Access Violation in two separate threads" << std::endl;
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std::cout << "[11] Just throw (in this thread)" << std::endl;
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std::cout << "[11] Throw a std::future_error" << std::endl;
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std::cout << "[12] Just CHECK(false) (in this thread)" << std::endl;
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std::cout << "[13] 10,000 Continious crashes with out of bounds array indexing" << std::endl;
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std::cout << "[14] 10,000 Continious crashes with segmentation fault attempts" << std::endl;
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std::cout << std::flush;
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try {
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std::getline(std::cin, option);
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choice = std::stoi(option);
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if (choice <= 0 || choice > 12) {
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if (choice <= 0 || choice > 14) {
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std::cout << "Invalid choice: [" << option << "\n\n";
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} else {
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return choice;
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@ -236,9 +273,9 @@ namespace
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void breakHere() {
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std::ostringstream oss;
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oss << __FUNCTION__ << " was reached" << std::endl;
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std::cout << oss.str() << std::endl;
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oss << "Fatal hook function: " << __FUNCTION__ << ":" << __LINE__ << " was called";
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oss << " through g3::setFatalPreLoggingHook(). setFatalPreLoggingHook should be called AFTER g3::initializeLogging()" << std::endl;
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LOG(DEBUG) << oss.str();
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#if (defined(WIN32) || defined(_WIN32) || defined(__WIN32__))
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__debugbreak();
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#endif
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@ -246,12 +283,13 @@ void breakHere() {
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int main(int argc, char **argv)
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{
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auto worker = g3::LogWorker::createLogWorker();
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auto handle= worker->addDefaultLogger(argv[0], path_to_log_file);
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g3::initializeLogging(worker.get());
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g3::setFatalPreLoggingHook(&breakHere);
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std::future<std::string> log_file_name = handle->call(&g3::FileSink::fileName);
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std::cout << "**** G3LOG FATAL EXAMPLE ***\n\n"
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<< "Choose your type of fatal exit, then "
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<< " read the generated log and backtrace.\n"
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@ -15,6 +15,7 @@
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#error "crashhandler_unix.cpp used but it's a windows system"
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#endif
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#include <csignal>
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#include <cstring>
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#include <unistd.h>
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@ -23,7 +24,8 @@
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#include <cstdlib>
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#include <sstream>
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#include <iostream>
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#include <thread>
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#include <atomic>
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// Linux/Clang, OSX/Clang, OSX/gcc
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#if (defined(__clang__) || defined(__APPLE__))
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@ -34,10 +36,35 @@
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namespace {
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bool shouldDoExit() {
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static std::atomic<uint64_t> firstExit{0};
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auto const count = firstExit.fetch_add(1, std::memory_order_relaxed);
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return (0 == count);
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}
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void restoreSignalHandler(int signal_number) {
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std::cerr << "\n\n" << __FUNCTION__ << " " << signal_number << " threadID: " << std::this_thread::get_id() << std::endl;
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#if !(defined(DISABLE_FATAL_SIGNALHANDLING))
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struct sigaction action;
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memset(&action, 0, sizeof (action)); //
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sigemptyset(&action.sa_mask);
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action.sa_handler = SIG_DFL; // take default action for the signal
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sigaction(signal_number, &action, NULL);
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#endif
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}
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// Dump of stack,. then exit through g3log background worker
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// ALL thanks to this thread at StackOverflow. Pretty much borrowed from:
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// Ref: http://stackoverflow.com/questions/77005/how-to-generate-a-stacktrace-when-my-gcc-c-app-crashes
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void signalHandler(int signal_number, siginfo_t *info, void *unused_context) {
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// Only one signal will be allowed past this point
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if (false == shouldDoExit()) {
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while (true) {
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std::this_thread::sleep_for(std::chrono::seconds(1));
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}
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}
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using namespace g3::internal;
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{
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const auto dump = stackdump();
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@ -74,10 +101,11 @@ namespace g3 {
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// http://stackoverflow.com/questions/6878546/why-doesnt-parent-process-return-to-the-exact-location-after-handling-signal_number
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namespace internal {
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bool blockForFatalHandling() {
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bool shouldBlockForFatalHandling() {
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return true; // For windows we will after fatal processing change it to false
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}
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/// Generate stackdump. Or in case a stackdump was pre-generated and non-empty just use that one
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/// i.e. the latter case is only for Windows and test purposes
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std::string stackdump(const char *rawdump) {
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@ -180,24 +208,18 @@ namespace g3 {
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// Triggered by g3log->g3LogWorker after receiving a FATAL trigger
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// which is LOG(FATAL), CHECK(false) or a fatal signal our signalhandler caught.
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// --- If LOG(FATAL) or CHECK(false) the signal_number will be SIGABRT
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void exitWithDefaultSignalHandler(const LEVELS &level, g3::SignalType fatal_signal_id) {
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void exitWithDefaultSignalHandler(const LEVELS &level, g3::SignalType fatal_signal_id) {
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const int signal_number = static_cast<int>(fatal_signal_id);
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std::cerr << "Exiting due to " << level.text << ", " << signal_number << " " << std::flush;
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restoreSignalHandler(signal_number);
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std::cerr << "\n\n" << __FUNCTION__ << ":" << __LINE__ << ". Exiting due to " << level.text << ", " << signal_number << " \n\n" << std::flush;
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#if !(defined(DISABLE_FATAL_SIGNALHANDLING))
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struct sigaction action;
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memset(&action, 0, sizeof (action)); //
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sigemptyset(&action.sa_mask);
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action.sa_handler = SIG_DFL; // take default action for the signal
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sigaction(signal_number, &action, NULL);
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#endif
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kill(getpid(), signal_number);
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abort(); // should never reach this
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exit(signal_number);
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}
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} // end g3::internal
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//
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// Installs FATAL signal handler that is enough to handle most fatal events
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// on *NIX systems
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@ -148,11 +148,9 @@ namespace {
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namespace g3 {
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namespace internal {
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// For windows exceptions this might ONCE be set to false, in case of a
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// windows exceptions and not a signal
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bool blockForFatalHandling() {
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bool shouldBlockForFatalHandling() {
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return gBlockForFatal;
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}
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@ -233,7 +233,7 @@ namespace g3 {
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internal::exitWithDefaultSignalHandler(message.get()->_level, message.get()->_signal_id);
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}
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g_logger_instance->fatal(message);
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while (blockForFatalHandling()) {
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while (shouldBlockForFatalHandling()) {
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std::this_thread::sleep_for(std::chrono::seconds(1));
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}
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}
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@ -11,11 +11,22 @@
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#include <csignal>
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#include "g3log/loglevels.hpp"
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#include "g3log/generated_definitions.hpp"
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// kjell. Separera på crashhandler.hpp och crashhanlder_internal.hpp
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// implementationsfilen kan vara den samma
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namespace g3 {
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// PUBLIC API:
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/** Install signal handler that catches FATAL C-runtime or OS signals
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See the wikipedia site for details http://en.wikipedia.org/wiki/SIGFPE
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See the this site for example usage: http://www.tutorialspoint.com/cplusplus/cpp_signal_handling.hpptm
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SIGABRT ABORT (ANSI), abnormal termination
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SIGFPE Floating point exception (ANSI)
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SIGILL ILlegal instruction (ANSI)
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SIGSEGV Segmentation violation i.e. illegal memory reference
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SIGTERM TERMINATION (ANSI) */
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void installCrashHandler();
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#if (defined(WIN32) || defined(_WIN32) || defined(__WIN32__))
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typedef unsigned long SignalType;
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@ -35,30 +46,18 @@ namespace g3 {
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* only in the case of Windows exceptions (not fatal signals)
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* are we interested in changing this from false to true to
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* help any other exceptions handler work with 'EXCEPTION_CONTINUE_SEARCH'*/
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bool blockForFatalHandling();
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bool shouldBlockForFatalHandling();
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/** \return signal_name Ref: signum.hpp and \ref installSignalHandler
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* or for Windows exception name */
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std::string exitReasonName(const LEVELS &level, g3::SignalType signal_number);
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std::string exitReasonName(const LEVELS& level, g3::SignalType signal_number);
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/** return calling thread's stackdump*/
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std::string stackdump(const char *dump = nullptr);
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std::string stackdump(const char* dump = nullptr);
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/** Re-"throw" a fatal signal, previously caught. This will exit the application
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* This is an internal only function. Do not use it elsewhere. It is triggered
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* from g3log, g3LogWorker after flushing messages to file */
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void exitWithDefaultSignalHandler(const LEVELS &level, g3::SignalType signal_number);
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void exitWithDefaultSignalHandler(const LEVELS& level, g3::SignalType signal_number);
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} // end g3::internal
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// PUBLIC API:
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/** Install signal handler that catches FATAL C-runtime or OS signals
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See the wikipedia site for details http://en.wikipedia.org/wiki/SIGFPE
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See the this site for example usage: http://www.tutorialspoint.com/cplusplus/cpp_signal_handling.hpptm
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SIGABRT ABORT (ANSI), abnormal termination
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SIGFPE Floating point exception (ANSI)
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SIGILL ILlegal instruction (ANSI)
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SIGSEGV Segmentation violation i.e. illegal memory reference
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SIGTERM TERMINATION (ANSI) */
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void installCrashHandler();
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}
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} // g3
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