godot/platform/x11/crash_handler_x11.cpp
Ibrahn Sahir 63068e2ccd Check project settings live before lookup in crash handler
In x11, windows and osx crash handlers, check project settings exists
before looking up the crash handler message setting.
Avoids crashing the crash handler when handling a crash outside project
settings lifetime. Instead omitting the configurable message and
continuing with trace dump.
2019-05-23 20:06:56 +01:00

150 lines
4.8 KiB
C++

/*************************************************************************/
/* crash_handler_x11.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2019 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 "crash_handler_x11.h"
#include "core/os/os.h"
#include "core/project_settings.h"
#include "main/main.h"
#ifdef 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>
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;
const ProjectSettings *proj_settings = ProjectSettings::get_singleton();
if (proj_settings) {
msg = proj_settings->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) {
for (size_t 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);
}
}
List<String> args;
char str[1024];
snprintf(str, 1024, "%p", bt_buffer[i]);
args.push_back(str);
args.push_back("-e");
args.push_back(_execpath);
String output = "";
// Try to get the file/line number using addr2line
int ret;
Error err = OS::get_singleton()->execute(String("addr2line"), args, true, NULL, &output, &ret);
if (err == OK) {
output.erase(output.length() - 1, 1);
}
fprintf(stderr, "[%ld] %s (%ls)\n", i, fname, 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
}