使用SetUnhandledExceptionFilter转储程序崩溃时内存DMP注意事项

使用代码手工生成dmp文件

SetUnhandledExceptionFilter

为每个线程设置SetUnhandledExceptionFilter(MyCallBack),（必须在每个线程中启动时调用一次，否则造成无法进入回调函数中）这样该线程中发现未处理的 SEH 异常时就会进入到MyCallBack 回调中.

无聊的是虽然MyCallBack 的参数是 SEH 异常的结构体指针,但 C++ 异常也会进入到MyCallBack 中.所以只要SetUnhandledExceptionFilter 就能抓到 C++ 的异常了.

按C++标准,未处理的C++异常应当是触发unexpected.而MS 放出话说它的编译器只触发terminate.而在MFC 中居然terminate 都不触发了,直接变成了 SEH 而进入了MyCallBack.

部分源码：

#include "stdafx.h"
#include "DumpHandle.h"
#include <stdlib.h>
#include <stdio.h>
#include <dbghelp.h>
#pragma comment(lib, "Dbghelp.lib")

LONG WINAPI DumpHandleFilterA(struct _EXCEPTION_POINTERS *lpExceptionInfo)
{
LONG ret = EXCEPTION_EXECUTE_HANDLER;
char szFileName[128] = {0};
SYSTEMTIME st = {0};

::GetLocalTime(&st);

wsprintfA(szFileName, ("CrashAt[%04d-%02d-%02d-%02d-%02d-%02d-%02d-%02d].dmp"),
st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond, st.wMilliseconds, rand()%100);
HANDLE hFile = ::CreateFileA(szFileName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
if (hFile != INVALID_HANDLE_VALUE)
{
MINIDUMP_EXCEPTION_INFORMATION ExInfo;
ExInfo.ThreadId = ::GetCurrentThreadId();
ExInfo.ExceptionPointers = lpExceptionInfo;
ExInfo.ClientPointers = false;
// write the dump
BOOL bOK = MiniDumpWriteDump(GetCurrentProcess(), GetCurrentProcessId(), hFile, MiniDumpNormal, &ExInfo, NULL, NULL );
if (bOK)
{
DumpDbgPrintA(("Create Dump File Success!/n"));
DumpDbgMsgboxA("Create Dump File Success!/n");
}
else
{
DumpDbgPrintA(("MiniDumpWriteDump Failed: %d/n"), GetLastError() );
DumpDbgMsgboxA(("MiniDumpWriteDump Failed: %d/n"), GetLastError() );
}
::CloseHandle(hFile);
}
else
{
DumpDbgPrintA(("Create File %s Failed %d/n"), szFileName, GetLastError());
DumpDbgMsgboxA(("Create File %s Failed %d/n"), szFileName, GetLastError());
}

return ret;
}

void DumpDbgPrintA (char *fmt, ... )
{
va_list argptr;/* Argument list pointer*/
char str[1024*3] = {0};/* Buffer to build sting into*/

va_start (argptr, fmt);/* Initialize va_ functions*/
wvsprintfA (str, fmt, argptr);/* prints string to buffer*/
OutputDebugStringA(str);
va_end (argptr);/* Close va_ functions*/
}

void DumpDbgMsgboxA (char *fmt, ... )
{
va_list argptr;/* Argument list pointer*/
char str[1024*3] = {0};/* Buffer to build sting into*/

va_start (argptr, fmt);/* Initialize va_ functions*/
wvsprintfA (str, fmt, argptr);/* prints string to buffer*/
MessageBoxA (NULL, str, "Debug Message",
MB_ICONINFORMATION | MB_OK);
va_end (argptr);/* Close va_ functions*/
}