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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#ifdef _WIN32
#include "mongo/platform/basic.h"
#pragma warning(push)
// C4091: 'typedef ': ignored on left of '' when no variable is declared
#pragma warning(disable : 4091)
#include <DbgHelp.h>
#pragma warning(pop)
#include <ostream>
#include "mongo/config.h"
#include "mongo/logv2/log.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/exit_code.h"
#include "mongo/util/quick_exit.h"
#include "mongo/util/stacktrace_windows.h"
#include "mongo/util/text.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kControl
namespace mongo {
namespace {
/* create a process dump.
To use, load up windbg. Set your symbol and source path.
Open the crash dump file. To see the crashing context, use .ecxr in windbg
TODO: consider using WER local dumps in the future
*/
void doMinidumpWithException(struct _EXCEPTION_POINTERS* exceptionInfo) {
WCHAR moduleFileName[MAX_PATH];
DWORD ret = GetModuleFileNameW(nullptr, &moduleFileName[0], ARRAYSIZE(moduleFileName));
if (ret == 0) {
auto ec = lastSystemError();
LOGV2(23130,
"GetModuleFileName failed {error}",
"GetModuleFileName failed",
"error"_attr = errorMessage(ec));
// Fallback name
wcscpy_s(moduleFileName, L"mongo");
} else {
WCHAR* dotStr = wcsrchr(&moduleFileName[0], L'.');
if (dotStr != nullptr) {
*dotStr = L'\0';
}
}
std::wstring dumpName(moduleFileName);
dumpName += L".";
dumpName += toWideStringFromStringData(terseCurrentTimeForFilename());
dumpName += L".mdmp";
HANDLE hFile = CreateFileW(
dumpName.c_str(), GENERIC_WRITE, 0, nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr);
if (INVALID_HANDLE_VALUE == hFile) {
auto ec = lastSystemError();
LOGV2(23131,
"Failed to open minidump file {dumpName}: {error}",
"Failed to open minidump file",
"dumpName"_attr = toUtf8String(dumpName.c_str()),
"error"_attr = errorMessage(ec));
return;
}
MINIDUMP_EXCEPTION_INFORMATION aMiniDumpInfo;
aMiniDumpInfo.ThreadId = GetCurrentThreadId();
aMiniDumpInfo.ExceptionPointers = exceptionInfo;
aMiniDumpInfo.ClientPointers = FALSE;
MINIDUMP_TYPE miniDumpType =
#ifdef MONGO_CONFIG_DEBUG_BUILD
MiniDumpWithFullMemory;
#else
static_cast<MINIDUMP_TYPE>(MiniDumpNormal | MiniDumpWithIndirectlyReferencedMemory |
MiniDumpWithProcessThreadData);
#endif
LOGV2(23132,
"Writing minidump diagnostic file {dumpName}",
"Writing minidump diagnostic file",
"dumpName"_attr = toUtf8String(dumpName.c_str()));
BOOL bstatus = MiniDumpWriteDump(GetCurrentProcess(),
GetCurrentProcessId(),
hFile,
miniDumpType,
exceptionInfo != nullptr ? &aMiniDumpInfo : nullptr,
nullptr,
nullptr);
if (FALSE == bstatus) {
auto ec = lastSystemError();
LOGV2(23133,
"Failed to create minidump: {error}",
"Failed to create minidump",
"error"_attr = errorMessage(ec));
}
CloseHandle(hFile);
}
} // namespace
LONG WINAPI exceptionFilter(struct _EXCEPTION_POINTERS* excPointers) {
char exceptionString[128];
sprintf_s(exceptionString,
sizeof(exceptionString),
(excPointers->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION)
? "(access violation)"
: "0x%08X",
excPointers->ExceptionRecord->ExceptionCode);
char addressString[32];
sprintf_s(addressString,
sizeof(addressString),
"0x%p",
excPointers->ExceptionRecord->ExceptionAddress);
LOGV2_FATAL_CONTINUE(
23134,
"*** unhandled exception {exceptionString} at {addressString}, terminating",
"Unhandled exception",
"exceptionString"_attr = exceptionString,
"addressString"_attr = addressString);
if (excPointers->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION) {
ULONG acType = excPointers->ExceptionRecord->ExceptionInformation[0];
const char* acTypeString;
switch (acType) {
case 0:
acTypeString = "read from";
break;
case 1:
acTypeString = "write to";
break;
case 8:
acTypeString = "DEP violation at";
break;
default:
acTypeString = "unknown violation at";
break;
}
sprintf_s(addressString,
sizeof(addressString),
" 0x%llx",
excPointers->ExceptionRecord->ExceptionInformation[1]);
LOGV2_FATAL_CONTINUE(23135,
"*** access violation was a {accessType}{address}",
"Access violation",
"accessType"_attr = acTypeString,
"address"_attr = addressString);
}
LOGV2_FATAL_CONTINUE(23136, "*** stack trace for unhandled exception:");
// Create a copy of context record because printWindowsStackTrace will mutate it.
CONTEXT contextCopy(*(excPointers->ContextRecord));
printWindowsStackTrace(contextCopy);
doMinidumpWithException(excPointers);
// Don't go through normal shutdown procedure. It may make things worse.
// Do not go through _exit or ExitProcess(), terminate immediately
LOGV2_FATAL_CONTINUE(23137, "*** immediate exit due to unhandled exception");
TerminateProcess(GetCurrentProcess(), static_cast<UINT>(ExitCode::abrupt));
// We won't reach here
return EXCEPTION_EXECUTE_HANDLER;
}
LPTOP_LEVEL_EXCEPTION_FILTER filtLast = 0;
void setWindowsUnhandledExceptionFilter() {
filtLast = SetUnhandledExceptionFilter(exceptionFilter);
}
} // namespace mongo
#else
namespace mongo {
void setWindowsUnhandledExceptionFilter() {}
} // namespace mongo
#endif // _WIN32
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