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Merge pull request #11061 from marcelofg55/dump_backtrace
Add a segfault handler to dump the backtrace on Windows, Linux and OS X
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Original file line number | Diff line number | Diff line change |
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/*************************************************************************/ | ||
/* crash_handler_osx.h */ | ||
/*************************************************************************/ | ||
/* This file is part of: */ | ||
/* GODOT ENGINE */ | ||
/* https://godotengine.org */ | ||
/*************************************************************************/ | ||
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */ | ||
/* Copyright (c) 2014-2017 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. */ | ||
/*************************************************************************/ | ||
#ifndef CRASH_HANDLER_OSX_H | ||
#define CRASH_HANDLER_OSX_H | ||
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class CrashHandler { | ||
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bool disabled; | ||
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public: | ||
void initialize(); | ||
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void disable(); | ||
bool is_disabled() const { return disabled; }; | ||
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CrashHandler(); | ||
~CrashHandler(); | ||
}; | ||
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#endif |
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/*************************************************************************/ | ||
/* crash_handler_osx.mm */ | ||
/*************************************************************************/ | ||
/* This file is part of: */ | ||
/* GODOT ENGINE */ | ||
/* https://godotengine.org */ | ||
/*************************************************************************/ | ||
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */ | ||
/* Copyright (c) 2014-2017 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 "main/main.h" | ||
#include "os_osx.h" | ||
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#include <string.h> | ||
#include <unistd.h> | ||
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// Note: Dump backtrace in 32bit mode is getting a bus error on the fgets by the ->execute, so enable only on 64bit | ||
#if defined(DEBUG_ENABLED) && defined(__x86_64__) | ||
#define CRASH_HANDLER_ENABLED 1 | ||
#endif | ||
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#ifdef CRASH_HANDLER_ENABLED | ||
#include <cxxabi.h> | ||
#include <dlfcn.h> | ||
#include <execinfo.h> | ||
#include <signal.h> | ||
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#include <mach-o/dyld.h> | ||
#include <mach-o/getsect.h> | ||
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#ifdef __x86_64__ | ||
static uint64_t load_address() { | ||
const struct segment_command_64 *cmd = getsegbyname("__TEXT"); | ||
#else | ||
static uint32_t load_address() { | ||
const struct segment_command *cmd = getsegbyname("__TEXT"); | ||
#endif | ||
char full_path[1024]; | ||
uint32_t size = sizeof(full_path); | ||
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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); | ||
} | ||
} | ||
} | ||
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return 0; | ||
} | ||
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static void handle_crash(int sig) { | ||
if (OS::get_singleton() == NULL) | ||
return; | ||
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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/backtrace/message"); | ||
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// Dump the backtrace to stderr with a message to the user | ||
fprintf(stderr, "%s: Program crashed with signal %d\n", __FUNCTION__, sig); | ||
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(); | ||
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for (int i = 1; i < size; i++) { | ||
char fname[1024]; | ||
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 | ||
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); | ||
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if (status == 0 && demangled) { | ||
snprintf(fname, 1024, "%s", demangled); | ||
} | ||
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if (demangled) | ||
free(demangled); | ||
} | ||
} | ||
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String output = fname; | ||
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// Try to get the file/line number using atos | ||
if (bt_buffer[i] > (void *)0x0 && OS::get_singleton()) { | ||
List<String> args; | ||
char str[1024]; | ||
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args.push_back("-o"); | ||
args.push_back(_execpath); | ||
args.push_back("-arch"); | ||
#ifdef __x86_64__ | ||
args.push_back("x86_64"); | ||
#else | ||
args.push_back("i386"); | ||
#endif | ||
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); | ||
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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; | ||
} | ||
} | ||
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fprintf(stderr, "[%d] %ls\n", i, output.c_str()); | ||
} | ||
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free(strings); | ||
} | ||
fprintf(stderr, "-- END OF BACKTRACE --\n"); | ||
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// Abort to pass the error to the OS | ||
abort(); | ||
} | ||
#endif | ||
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CrashHandler::CrashHandler() { | ||
disabled = false; | ||
} | ||
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CrashHandler::~CrashHandler() { | ||
} | ||
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void CrashHandler::disable() { | ||
if (disabled) | ||
return; | ||
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#ifdef CRASH_HANDLER_ENABLED | ||
signal(SIGSEGV, NULL); | ||
signal(SIGFPE, NULL); | ||
signal(SIGILL, NULL); | ||
#endif | ||
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disabled = true; | ||
} | ||
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void CrashHandler::initialize() { | ||
#ifdef CRASH_HANDLER_ENABLED | ||
signal(SIGSEGV, handle_crash); | ||
signal(SIGFPE, handle_crash); | ||
signal(SIGILL, handle_crash); | ||
#endif | ||
} |
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