/*************************************************************************/ /* crash_handler_osx.mm */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ #include "core/project_settings.h" #include "main/main.h" #include "os_osx.h" #include <string.h> #include <unistd.h> #if defined(DEBUG_ENABLED) #define CRASH_HANDLER_ENABLED 1 #endif #ifdef CRASH_HANDLER_ENABLED #include <cxxabi.h> #include <dlfcn.h> #include <execinfo.h> #include <signal.h> #include <stdlib.h> #include <mach-o/dyld.h> #include <mach-o/getsect.h> static uint64_t load_address() { const struct segment_command_64 *cmd = getsegbyname("__TEXT"); char full_path[1024]; uint32_t size = sizeof(full_path); if (cmd && !_NSGetExecutablePath(full_path, &size)) { uint32_t dyld_count = _dyld_image_count(); for (uint32_t i = 0; i < dyld_count; i++) { const char *image_name = _dyld_get_image_name(i); if (image_name && strncmp(image_name, full_path, 1024) == 0) { return cmd->vmaddr + _dyld_get_image_vmaddr_slide(i); } } } return 0; } static void handle_crash(int sig) { if (OS::get_singleton() == NULL) { abort(); } void *bt_buffer[256]; size_t size = backtrace(bt_buffer, 256); String _execpath = OS::get_singleton()->get_executable_path(); String msg = GLOBAL_GET("debug/settings/crash_handler/message"); // Dump the backtrace to stderr with a message to the user fprintf(stderr, "%s: Program crashed with signal %d\n", __FUNCTION__, sig); if (OS::get_singleton()->get_main_loop()) OS::get_singleton()->get_main_loop()->notification(MainLoop::NOTIFICATION_CRASH); fprintf(stderr, "Dumping the backtrace. %ls\n", msg.c_str()); char **strings = backtrace_symbols(bt_buffer, size); if (strings) { void *load_addr = (void *)load_address(); for (int i = 1; i < size; i++) { char fname[1024]; Dl_info info; snprintf(fname, 1024, "%s", strings[i]); // Try to demangle the function name to provide a more readable one if (dladdr(bt_buffer[i], &info) && info.dli_sname) { if (info.dli_sname[0] == '_') { int status; char *demangled = abi::__cxa_demangle(info.dli_sname, NULL, 0, &status); if (status == 0 && demangled) { snprintf(fname, 1024, "%s", demangled); } if (demangled) free(demangled); } } String output = fname; // Try to get the file/line number using atos if (bt_buffer[i] > (void *)0x0 && OS::get_singleton()) { List<String> args; char str[1024]; args.push_back("-o"); args.push_back(_execpath); args.push_back("-arch"); args.push_back("x86_64"); args.push_back("-l"); snprintf(str, 1024, "%p", load_addr); args.push_back(str); snprintf(str, 1024, "%p", bt_buffer[i]); args.push_back(str); int ret; String out = ""; Error err = OS::get_singleton()->execute(String("atos"), args, true, NULL, &out, &ret); if (err == OK && out.substr(0, 2) != "0x") { out.erase(out.length() - 1, 1); output = out; } } fprintf(stderr, "[%d] %ls\n", i, output.c_str()); } free(strings); } fprintf(stderr, "-- END OF BACKTRACE --\n"); // Abort to pass the error to the OS abort(); } #endif CrashHandler::CrashHandler() { disabled = false; } CrashHandler::~CrashHandler() { disable(); } void CrashHandler::disable() { if (disabled) return; #ifdef CRASH_HANDLER_ENABLED signal(SIGSEGV, NULL); signal(SIGFPE, NULL); signal(SIGILL, NULL); #endif disabled = true; } void CrashHandler::initialize() { #ifdef CRASH_HANDLER_ENABLED signal(SIGSEGV, handle_crash); signal(SIGFPE, handle_crash); signal(SIGILL, handle_crash); #endif }