63068e2ccd
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.
224 lines
7.5 KiB
C++
224 lines
7.5 KiB
C++
/*************************************************************************/
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/* crash_handler_windows.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) 2007-2019 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2019 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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#include "crash_handler_windows.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_EXCEPTION
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// Backtrace code code based on: https://stackoverflow.com/questions/6205981/windows-c-stack-trace-from-a-running-app
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#include <psapi.h>
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#include <algorithm>
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#include <iterator>
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#include <vector>
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#pragma comment(lib, "psapi.lib")
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#pragma comment(lib, "dbghelp.lib")
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// Some versions of imagehlp.dll lack the proper packing directives themselves
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// so we need to do it.
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#pragma pack(push, before_imagehlp, 8)
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#include <imagehlp.h>
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#pragma pack(pop, before_imagehlp)
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struct module_data {
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std::string image_name;
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std::string module_name;
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void *base_address;
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DWORD load_size;
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};
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class symbol {
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typedef IMAGEHLP_SYMBOL64 sym_type;
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sym_type *sym;
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static const int max_name_len = 1024;
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public:
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symbol(HANDLE process, DWORD64 address) :
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sym((sym_type *)::operator new(sizeof(*sym) + max_name_len)) {
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memset(sym, '\0', sizeof(*sym) + max_name_len);
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sym->SizeOfStruct = sizeof(*sym);
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sym->MaxNameLength = max_name_len;
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DWORD64 displacement;
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SymGetSymFromAddr64(process, address, &displacement, sym);
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}
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std::string name() { return std::string(sym->Name); }
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std::string undecorated_name() {
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if (*sym->Name == '\0')
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return "<couldn't map PC to fn name>";
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std::vector<char> und_name(max_name_len);
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UnDecorateSymbolName(sym->Name, &und_name[0], max_name_len, UNDNAME_COMPLETE);
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return std::string(&und_name[0], strlen(&und_name[0]));
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}
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};
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class get_mod_info {
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HANDLE process;
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public:
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get_mod_info(HANDLE h) :
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process(h) {}
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module_data operator()(HMODULE module) {
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module_data ret;
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char temp[4096];
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MODULEINFO mi;
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GetModuleInformation(process, module, &mi, sizeof(mi));
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ret.base_address = mi.lpBaseOfDll;
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ret.load_size = mi.SizeOfImage;
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GetModuleFileNameEx(process, module, temp, sizeof(temp));
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ret.image_name = temp;
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GetModuleBaseName(process, module, temp, sizeof(temp));
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ret.module_name = temp;
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std::vector<char> img(ret.image_name.begin(), ret.image_name.end());
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std::vector<char> mod(ret.module_name.begin(), ret.module_name.end());
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SymLoadModule64(process, 0, &img[0], &mod[0], (DWORD64)ret.base_address, ret.load_size);
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return ret;
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}
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};
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DWORD CrashHandlerException(EXCEPTION_POINTERS *ep) {
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HANDLE process = GetCurrentProcess();
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HANDLE hThread = GetCurrentThread();
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DWORD offset_from_symbol = 0;
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IMAGEHLP_LINE64 line = { 0 };
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std::vector<module_data> modules;
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DWORD cbNeeded;
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std::vector<HMODULE> module_handles(1);
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if (OS::get_singleton() == NULL || OS::get_singleton()->is_disable_crash_handler() || IsDebuggerPresent()) {
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return EXCEPTION_CONTINUE_SEARCH;
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}
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fprintf(stderr, "%s: Program crashed\n", __FUNCTION__);
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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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// Load the symbols:
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if (!SymInitialize(process, NULL, false))
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return EXCEPTION_CONTINUE_SEARCH;
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SymSetOptions(SymGetOptions() | SYMOPT_LOAD_LINES | SYMOPT_UNDNAME);
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EnumProcessModules(process, &module_handles[0], module_handles.size() * sizeof(HMODULE), &cbNeeded);
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module_handles.resize(cbNeeded / sizeof(HMODULE));
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EnumProcessModules(process, &module_handles[0], module_handles.size() * sizeof(HMODULE), &cbNeeded);
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std::transform(module_handles.begin(), module_handles.end(), std::back_inserter(modules), get_mod_info(process));
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void *base = modules[0].base_address;
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// Setup stuff:
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CONTEXT *context = ep->ContextRecord;
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STACKFRAME64 frame;
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bool skip_first = false;
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frame.AddrPC.Mode = AddrModeFlat;
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frame.AddrStack.Mode = AddrModeFlat;
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frame.AddrFrame.Mode = AddrModeFlat;
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#ifdef _M_X64
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frame.AddrPC.Offset = context->Rip;
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frame.AddrStack.Offset = context->Rsp;
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frame.AddrFrame.Offset = context->Rbp;
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#else
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frame.AddrPC.Offset = context->Eip;
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frame.AddrStack.Offset = context->Esp;
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frame.AddrFrame.Offset = context->Ebp;
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// Skip the first one to avoid a duplicate on 32-bit mode
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skip_first = true;
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#endif
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line.SizeOfStruct = sizeof(line);
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IMAGE_NT_HEADERS *h = ImageNtHeader(base);
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DWORD image_type = h->FileHeader.Machine;
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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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fprintf(stderr, "Dumping the backtrace. %ls\n", msg.c_str());
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int n = 0;
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do {
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if (skip_first) {
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skip_first = false;
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} else {
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if (frame.AddrPC.Offset != 0) {
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std::string fnName = symbol(process, frame.AddrPC.Offset).undecorated_name();
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if (SymGetLineFromAddr64(process, frame.AddrPC.Offset, &offset_from_symbol, &line))
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fprintf(stderr, "[%d] %s (%s:%d)\n", n, fnName.c_str(), line.FileName, line.LineNumber);
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else
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fprintf(stderr, "[%d] %s\n", n, fnName.c_str());
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} else
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fprintf(stderr, "[%d] ???\n", n);
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n++;
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}
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if (!StackWalk64(image_type, process, hThread, &frame, context, NULL, SymFunctionTableAccess64, SymGetModuleBase64, NULL))
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break;
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} while (frame.AddrReturn.Offset != 0 && n < 256);
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fprintf(stderr, "-- END OF BACKTRACE --\n");
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SymCleanup(process);
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// Pass the exception to the OS
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return EXCEPTION_CONTINUE_SEARCH;
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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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disabled = true;
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}
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void CrashHandler::initialize() {
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}
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