653b832422
The two POSIX style crash handlers (OSX and X11) now remove their signal handlers when they are destroyed. Additonally if they are called while no OS singleton is set, they will simply abort(). This should not happen now that they remove themselves, but if a future change seperates OS object and crash handler lifetimes, this may be easier to report/debug than hanging on SIGSEGV.
145 lines
4.7 KiB
C++
145 lines
4.7 KiB
C++
/*************************************************************************/
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/* crash_handler_x11.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifdef DEBUG_ENABLED
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#define CRASH_HANDLER_ENABLED 1
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#endif
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#include "crash_handler_x11.h"
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#include "core/os/os.h"
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#include "core/project_settings.h"
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#include "main/main.h"
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#ifdef CRASH_HANDLER_ENABLED
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#include <cxxabi.h>
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#include <dlfcn.h>
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#include <execinfo.h>
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#include <signal.h>
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#include <stdlib.h>
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static void handle_crash(int sig) {
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if (OS::get_singleton() == NULL) {
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abort();
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}
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void *bt_buffer[256];
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size_t size = backtrace(bt_buffer, 256);
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String _execpath = OS::get_singleton()->get_executable_path();
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String msg = GLOBAL_GET("debug/settings/crash_handler/message");
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// Dump the backtrace to stderr with a message to the user
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fprintf(stderr, "%s: Program crashed with signal %d\n", __FUNCTION__, sig);
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if (OS::get_singleton()->get_main_loop())
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OS::get_singleton()->get_main_loop()->notification(MainLoop::NOTIFICATION_CRASH);
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fprintf(stderr, "Dumping the backtrace. %ls\n", msg.c_str());
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char **strings = backtrace_symbols(bt_buffer, size);
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if (strings) {
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for (size_t i = 1; i < size; i++) {
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char fname[1024];
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Dl_info info;
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snprintf(fname, 1024, "%s", strings[i]);
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// Try to demangle the function name to provide a more readable one
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if (dladdr(bt_buffer[i], &info) && info.dli_sname) {
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if (info.dli_sname[0] == '_') {
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int status;
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char *demangled = abi::__cxa_demangle(info.dli_sname, NULL, 0, &status);
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if (status == 0 && demangled) {
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snprintf(fname, 1024, "%s", demangled);
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}
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if (demangled)
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free(demangled);
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}
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}
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List<String> args;
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char str[1024];
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snprintf(str, 1024, "%p", bt_buffer[i]);
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args.push_back(str);
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args.push_back("-e");
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args.push_back(_execpath);
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String output = "";
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// Try to get the file/line number using addr2line
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if (OS::get_singleton()) {
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int ret;
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Error err = OS::get_singleton()->execute(String("addr2line"), args, true, NULL, &output, &ret);
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if (err == OK) {
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output.erase(output.length() - 1, 1);
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}
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}
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fprintf(stderr, "[%ld] %s (%ls)\n", i, fname, output.c_str());
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}
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free(strings);
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}
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fprintf(stderr, "-- END OF BACKTRACE --\n");
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// Abort to pass the error to the OS
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abort();
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}
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#endif
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CrashHandler::CrashHandler() {
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disabled = false;
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}
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CrashHandler::~CrashHandler() {
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disable();
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}
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void CrashHandler::disable() {
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if (disabled)
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return;
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#ifdef CRASH_HANDLER_ENABLED
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signal(SIGSEGV, NULL);
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signal(SIGFPE, NULL);
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signal(SIGILL, NULL);
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#endif
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disabled = true;
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}
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void CrashHandler::initialize() {
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#ifdef CRASH_HANDLER_ENABLED
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signal(SIGSEGV, handle_crash);
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signal(SIGFPE, handle_crash);
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signal(SIGILL, handle_crash);
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#endif
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}
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