godot/platform/windows/crash_handler_windows.cpp
Rémi Verschelde a7f49ac9a1 Update copyright statements to 2020
Happy new year to the wonderful Godot community!

We're starting a new decade with a well-established, non-profit, free
and open source game engine, and tons of further improvements in the
pipeline from hundreds of contributors.

Godot will keep getting better, and we're looking forward to all the
games that the community will keep developing and releasing with it.
2020-01-01 11:16:22 +01:00

225 lines
7.5 KiB
C++

/*************************************************************************/
/* crash_handler_windows.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 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_windows.h"
#include "core/os/os.h"
#include "core/project_settings.h"
#include "main/main.h"
#ifdef CRASH_HANDLER_EXCEPTION
// Backtrace code code based on: https://stackoverflow.com/questions/6205981/windows-c-stack-trace-from-a-running-app
#include <psapi.h>
#include <algorithm>
#include <iterator>
#include <vector>
#pragma comment(lib, "psapi.lib")
#pragma comment(lib, "dbghelp.lib")
// Some versions of imagehlp.dll lack the proper packing directives themselves
// so we need to do it.
#pragma pack(push, before_imagehlp, 8)
#include <imagehlp.h>
#pragma pack(pop, before_imagehlp)
struct module_data {
std::string image_name;
std::string module_name;
void *base_address;
DWORD load_size;
};
class symbol {
typedef IMAGEHLP_SYMBOL64 sym_type;
sym_type *sym;
static const int max_name_len = 1024;
public:
symbol(HANDLE process, DWORD64 address) :
sym((sym_type *)::operator new(sizeof(*sym) + max_name_len)) {
memset(sym, '\0', sizeof(*sym) + max_name_len);
sym->SizeOfStruct = sizeof(*sym);
sym->MaxNameLength = max_name_len;
DWORD64 displacement;
SymGetSymFromAddr64(process, address, &displacement, sym);
}
std::string name() { return std::string(sym->Name); }
std::string undecorated_name() {
if (*sym->Name == '\0')
return "<couldn't map PC to fn name>";
std::vector<char> und_name(max_name_len);
UnDecorateSymbolName(sym->Name, &und_name[0], max_name_len, UNDNAME_COMPLETE);
return std::string(&und_name[0], strlen(&und_name[0]));
}
};
class get_mod_info {
HANDLE process;
public:
get_mod_info(HANDLE h) :
process(h) {}
module_data operator()(HMODULE module) {
module_data ret;
char temp[4096];
MODULEINFO mi;
GetModuleInformation(process, module, &mi, sizeof(mi));
ret.base_address = mi.lpBaseOfDll;
ret.load_size = mi.SizeOfImage;
GetModuleFileNameEx(process, module, temp, sizeof(temp));
ret.image_name = temp;
GetModuleBaseName(process, module, temp, sizeof(temp));
ret.module_name = temp;
std::vector<char> img(ret.image_name.begin(), ret.image_name.end());
std::vector<char> mod(ret.module_name.begin(), ret.module_name.end());
SymLoadModule64(process, 0, &img[0], &mod[0], (DWORD64)ret.base_address, ret.load_size);
return ret;
}
};
DWORD CrashHandlerException(EXCEPTION_POINTERS *ep) {
HANDLE process = GetCurrentProcess();
HANDLE hThread = GetCurrentThread();
DWORD offset_from_symbol = 0;
IMAGEHLP_LINE64 line = { 0 };
std::vector<module_data> modules;
DWORD cbNeeded;
std::vector<HMODULE> module_handles(1);
if (OS::get_singleton() == NULL || OS::get_singleton()->is_disable_crash_handler() || IsDebuggerPresent()) {
return EXCEPTION_CONTINUE_SEARCH;
}
fprintf(stderr, "%s: Program crashed\n", __FUNCTION__);
if (OS::get_singleton()->get_main_loop())
OS::get_singleton()->get_main_loop()->notification(MainLoop::NOTIFICATION_CRASH);
// Load the symbols:
if (!SymInitialize(process, NULL, false))
return EXCEPTION_CONTINUE_SEARCH;
SymSetOptions(SymGetOptions() | SYMOPT_LOAD_LINES | SYMOPT_UNDNAME);
EnumProcessModules(process, &module_handles[0], module_handles.size() * sizeof(HMODULE), &cbNeeded);
module_handles.resize(cbNeeded / sizeof(HMODULE));
EnumProcessModules(process, &module_handles[0], module_handles.size() * sizeof(HMODULE), &cbNeeded);
std::transform(module_handles.begin(), module_handles.end(), std::back_inserter(modules), get_mod_info(process));
void *base = modules[0].base_address;
// Setup stuff:
CONTEXT *context = ep->ContextRecord;
STACKFRAME64 frame;
bool skip_first = false;
frame.AddrPC.Mode = AddrModeFlat;
frame.AddrStack.Mode = AddrModeFlat;
frame.AddrFrame.Mode = AddrModeFlat;
#ifdef _M_X64
frame.AddrPC.Offset = context->Rip;
frame.AddrStack.Offset = context->Rsp;
frame.AddrFrame.Offset = context->Rbp;
#else
frame.AddrPC.Offset = context->Eip;
frame.AddrStack.Offset = context->Esp;
frame.AddrFrame.Offset = context->Ebp;
// Skip the first one to avoid a duplicate on 32-bit mode
skip_first = true;
#endif
line.SizeOfStruct = sizeof(line);
IMAGE_NT_HEADERS *h = ImageNtHeader(base);
DWORD image_type = h->FileHeader.Machine;
String msg;
const ProjectSettings *proj_settings = ProjectSettings::get_singleton();
if (proj_settings) {
msg = proj_settings->get("debug/settings/crash_handler/message");
}
fprintf(stderr, "Dumping the backtrace. %ls\n", msg.c_str());
int n = 0;
do {
if (skip_first) {
skip_first = false;
} else {
if (frame.AddrPC.Offset != 0) {
std::string fnName = symbol(process, frame.AddrPC.Offset).undecorated_name();
if (SymGetLineFromAddr64(process, frame.AddrPC.Offset, &offset_from_symbol, &line))
fprintf(stderr, "[%d] %s (%s:%d)\n", n, fnName.c_str(), line.FileName, line.LineNumber);
else
fprintf(stderr, "[%d] %s\n", n, fnName.c_str());
} else
fprintf(stderr, "[%d] ???\n", n);
n++;
}
if (!StackWalk64(image_type, process, hThread, &frame, context, NULL, SymFunctionTableAccess64, SymGetModuleBase64, NULL))
break;
} while (frame.AddrReturn.Offset != 0 && n < 256);
fprintf(stderr, "-- END OF BACKTRACE --\n");
SymCleanup(process);
// Pass the exception to the OS
return EXCEPTION_CONTINUE_SEARCH;
}
#endif
CrashHandler::CrashHandler() {
disabled = false;
}
CrashHandler::~CrashHandler() {
}
void CrashHandler::disable() {
if (disabled)
return;
disabled = true;
}
void CrashHandler::initialize() {
}