Files
gopeed/ui/flutter/windows/runner/crash_handler.cpp
T

120 lines
4.4 KiB
C++

#include "crash_handler.h"
#include <dbghelp.h>
#include <strsafe.h>
#include <cstdint>
#include <cstring>
#include <filesystem>
#include <string>
#include <system_error>
namespace {
HANDLE crash_log = INVALID_HANDLE_VALUE;
std::wstring dump_path;
volatile LONG recording = 0;
LPTOP_LEVEL_EXCEPTION_FILTER previous_filter = nullptr;
void WriteLog(const char* text) {
if (crash_log == INVALID_HANDLE_VALUE) return;
DWORD written = 0;
WriteFile(crash_log, text, static_cast<DWORD>(strlen(text)), &written,
nullptr);
FlushFileBuffers(crash_log);
}
LONG WINAPI UnhandledException(EXCEPTION_POINTERS* exception) {
RecordNativeCrash(exception);
return previous_filter ? previous_filter(exception)
: EXCEPTION_CONTINUE_SEARCH;
}
LONG CALLBACK FatalCallbackException(EXCEPTION_POINTERS* exception) {
// Windows can terminate on this callback exception without invoking the
// process's unhandled filter. Ignore ordinary first-chance exceptions (Go,
// Dart and plugins may handle those) and observe only this fatal status.
if (exception->ExceptionRecord->ExceptionCode == 0xC000041D) {
RecordNativeCrash(exception);
}
return EXCEPTION_CONTINUE_SEARCH;
}
} // namespace
LONG RecordNativeCrash(EXCEPTION_POINTERS* exception) {
if (!exception || InterlockedCompareExchange(&recording, 1, 0) != 0) {
return EXCEPTION_CONTINUE_SEARCH;
}
SYSTEMTIME time;
GetSystemTime(&time);
const auto* record = exception->ExceptionRecord;
HMODULE module = nullptr;
wchar_t module_path[MAX_PATH] = L"unknown";
GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
reinterpret_cast<LPCWSTR>(record->ExceptionAddress),
&module);
if (module) GetModuleFileNameW(module, module_path, MAX_PATH);
char line[2048] = {};
StringCchPrintfA(
line, ARRAYSIZE(line),
"\r\n%04u-%02u-%02uT%02u:%02u:%02uZ Gopeed %s pid=%lu tid=%lu "
"exception=0x%08lX address=%p module=%ls offset=0x%llX\r\n",
time.wYear, time.wMonth, time.wDay, time.wHour, time.wMinute,
time.wSecond, FLUTTER_VERSION, GetCurrentProcessId(), GetCurrentThreadId(),
record->ExceptionCode, record->ExceptionAddress, module_path,
static_cast<unsigned long long>(
reinterpret_cast<uintptr_t>(record->ExceptionAddress) -
reinterpret_cast<uintptr_t>(module)));
WriteLog(line);
HANDLE dump = CreateFileW(dump_path.c_str(), GENERIC_WRITE, 0, nullptr,
CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr);
if (dump != INVALID_HANDLE_VALUE) {
MINIDUMP_EXCEPTION_INFORMATION info = {};
info.ThreadId = GetCurrentThreadId();
info.ExceptionPointers = exception;
info.ClientPointers = FALSE;
const BOOL ok = MiniDumpWriteDump(
GetCurrentProcess(), GetCurrentProcessId(), dump,
static_cast<MINIDUMP_TYPE>(MiniDumpNormal | MiniDumpWithThreadInfo |
MiniDumpWithUnloadedModules),
&info, nullptr, nullptr);
const DWORD error = ok ? ERROR_SUCCESS : GetLastError();
FlushFileBuffers(dump);
CloseHandle(dump);
StringCchPrintfA(line, ARRAYSIZE(line), "minidump success=%d error=%lu\r\n",
ok, error);
WriteLog(line);
} else {
StringCchPrintfA(line, ARRAYSIZE(line), "minidump open error=%lu\r\n",
GetLastError());
WriteLog(line);
}
// Do not swallow an exception or resume a potentially corrupted process.
return EXCEPTION_CONTINUE_SEARCH;
}
void InstallCrashHandler() {
// Match Dart's Windows storage path independently of the working directory.
wchar_t executable[32768] = {};
const DWORD length = GetModuleFileNameW(nullptr, executable, ARRAYSIZE(executable));
if (length == 0 || length >= ARRAYSIZE(executable)) return;
const auto directory = std::filesystem::path(executable).parent_path() /
L"storage" / L"logs";
std::error_code error;
std::filesystem::create_directories(directory, error);
if (error) return;
dump_path = (directory / L"native-crash.dmp").wstring();
crash_log = CreateFileW((directory / L"native-crash.log").c_str(),
FILE_APPEND_DATA, FILE_SHARE_READ, nullptr, OPEN_ALWAYS,
FILE_ATTRIBUTE_NORMAL, nullptr);
previous_filter = SetUnhandledExceptionFilter(UnhandledException);
AddVectoredExceptionHandler(1, FatalCallbackException);
}