206 lines
6.9 KiB
C++
206 lines
6.9 KiB
C++
/**************************************************************************/
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/* crash_handler_windows_signal.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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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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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#include "crash_handler_windows.h"
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#include "core/config/project_settings.h"
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#include "core/os/os.h"
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#include "core/string/print_string.h"
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#include "core/version.h"
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#include "main/main.h"
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#ifdef CRASH_HANDLER_EXCEPTION
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#include <cxxabi.h>
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#include <signal.h>
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#include <algorithm>
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#include <iterator>
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#include <string>
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#include <vector>
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#include <psapi.h>
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#include "thirdparty/libbacktrace/backtrace.h"
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struct CrashHandlerData {
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int64_t index = 0;
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backtrace_state *state = nullptr;
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int64_t offset = 0;
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};
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int symbol_callback(void *data, uintptr_t pc, const char *filename, int lineno, const char *function) {
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CrashHandlerData *ch_data = reinterpret_cast<CrashHandlerData *>(data);
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if (!function) {
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return 0;
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}
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char fname[1024];
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snprintf(fname, 1024, "%s", function);
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if (function[0] == '_') {
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int status;
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char *demangled = abi::__cxa_demangle(function, nullptr, nullptr, &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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print_error(vformat("[%d] %s (%s:%d)", ch_data->index++, String::utf8(fname), String::utf8(filename), lineno));
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return 0;
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}
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void error_callback(void *data, const char *msg, int errnum) {
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CrashHandlerData *ch_data = reinterpret_cast<CrashHandlerData *>(data);
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if (ch_data->index == 0) {
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print_error(vformat("Error(%d): %s", errnum, String::utf8(msg)));
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} else {
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print_error(vformat("[%d] error(%d): %s", ch_data->index++, errnum, String::utf8(msg)));
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}
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}
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int trace_callback(void *data, uintptr_t pc) {
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CrashHandlerData *ch_data = reinterpret_cast<CrashHandlerData *>(data);
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backtrace_pcinfo(ch_data->state, pc - ch_data->offset, &symbol_callback, &error_callback, data);
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return 0;
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}
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int64_t get_image_base(const String &p_path) {
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Ref<FileAccess> f = FileAccess::open(p_path, FileAccess::READ);
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if (f.is_null()) {
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return 0;
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}
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{
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f->seek(0x3c);
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uint32_t pe_pos = f->get_32();
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f->seek(pe_pos);
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uint32_t magic = f->get_32();
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if (magic != 0x00004550) {
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return 0;
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}
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}
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int64_t opt_header_pos = f->get_position() + 0x14;
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f->seek(opt_header_pos);
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uint16_t opt_header_magic = f->get_16();
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if (opt_header_magic == 0x10B) {
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f->seek(opt_header_pos + 0x1C);
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return f->get_32();
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} else if (opt_header_magic == 0x20B) {
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f->seek(opt_header_pos + 0x18);
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return f->get_64();
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} else {
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return 0;
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}
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}
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extern void CrashHandlerException(int signal) {
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CrashHandlerData data;
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if (OS::get_singleton() == nullptr || OS::get_singleton()->is_disable_crash_handler() || IsDebuggerPresent()) {
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return;
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}
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String msg;
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const ProjectSettings *proj_settings = ProjectSettings::get_singleton();
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if (proj_settings) {
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msg = proj_settings->get("debug/settings/crash_handler/message");
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}
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// Tell MainLoop about the crash. This can be handled by users too in Node.
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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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}
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print_error("\n================================================================");
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print_error(vformat("%s: Program crashed with signal %d", __FUNCTION__, signal));
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// Print the engine version just before, so that people are reminded to include the version in backtrace reports.
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if (String(VERSION_HASH).is_empty()) {
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print_error(vformat("Engine version: %s", VERSION_FULL_NAME));
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} else {
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print_error(vformat("Engine version: %s (%s)", VERSION_FULL_NAME, VERSION_HASH));
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}
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print_error(vformat("Dumping the backtrace. %s", msg));
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String _execpath = OS::get_singleton()->get_executable_path();
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// Load process and image info to determine ASLR addresses offset.
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MODULEINFO mi;
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GetModuleInformation(GetCurrentProcess(), GetModuleHandle(NULL), &mi, sizeof(mi));
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int64_t image_mem_base = reinterpret_cast<int64_t>(mi.lpBaseOfDll);
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int64_t image_file_base = get_image_base(_execpath);
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data.offset = image_mem_base - image_file_base;
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data.state = backtrace_create_state(_execpath.utf8().get_data(), 0, &error_callback, reinterpret_cast<void *>(&data));
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if (data.state != nullptr) {
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data.index = 1;
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backtrace_simple(data.state, 1, &trace_callback, &error_callback, reinterpret_cast<void *>(&data));
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}
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print_error("-- END OF BACKTRACE --");
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print_error("================================================================");
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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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}
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void CrashHandler::disable() {
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if (disabled) {
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return;
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}
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#if defined(CRASH_HANDLER_EXCEPTION)
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signal(SIGSEGV, nullptr);
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signal(SIGFPE, nullptr);
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signal(SIGILL, nullptr);
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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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#if defined(CRASH_HANDLER_EXCEPTION)
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signal(SIGSEGV, CrashHandlerException);
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signal(SIGFPE, CrashHandlerException);
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signal(SIGILL, CrashHandlerException);
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#endif
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}
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