如何编写一个会崩溃并产生转储文件的示例代码? [英] How to write a sample code that will crash and produce dump file?
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问题描述
我开始学习windbg,我发现这个好的帖子
如何使用WinDbg分析VC ++应用程序的崩溃转储
如何写这样的代码?
void Example4()
{
int * i = NULL;
* i = 80;
}
上述代码会立即崩溃;
谢谢
解决方案
#include< Windows.h>
#include< Dbghelp.h>
void make_minidump(EXCEPTION_POINTERS * e)
{
auto hDbgHelp = LoadLibraryA(dbghelp);
if(hDbgHelp == nullptr)
return;
auto pMiniDumpWriteDump =(decltype(& MiniDumpWriteDump))GetProcAddress(hDbgHelp,MiniDumpWriteDump);
if(pMiniDumpWriteDump == nullptr)
return;
char name [MAX_PATH];
{
auto nameEnd = name + GetModuleFileNameA(GetModuleHandleA(0),name,MAX_PATH);
SYSTEMTIME t;
GetSystemTime(& t);
wsprintfA(nameEnd - strlen(。exe),
_%4d%02d%02d_%02d%02d%02d.dmp,
t.wYear,t.wMonth, t.wDay,t.wHour,t.wMinute,t.wSecond);
}
auto hFile = CreateFileA(name,GENERIC_WRITE,FILE_SHARE_READ,0,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,0);
if(hFile == INVALID_HANDLE_VALUE)
return;
MINIDUMP_EXCEPTION_INFORMATION exceptionInfo;
exceptionInfo.ThreadId = GetCurrentThreadId();
exceptionInfo.ExceptionPointers = e;
exceptionInfo.ClientPointers = FALSE;
auto dumped = pMiniDumpWriteDump(
GetCurrentProcess(),
GetCurrentProcessId(),
hFile,
MINIDUMP_TYPE(MiniDumpWithIndirectlyReferencedMemory | MiniDumpScanMemory),
e ?& exceptionInfo:nullptr,
nullptr,
nullptr);
CloseHandle(hFile);
return;
}
LONG CALLBACK unhandled_handler(EXCEPTION_POINTERS * e)
{
make_minidump(e);
return EXCEPTION_CONTINUE_SEARCH;
}
int main()
{
SetUnhandledExceptionFilter(unhandled_handler);
return *(int *)0;
}
I started learned windbg and I found this good post How to use WinDbg to analyze the crash dump for VC++ application
Now I want to follow the instructions and do it step by step. Here is the problem: I need to write some sample code that can immediately crash, and create some dump files that can be used by windbg.
How to write such code?
void Example4()
{
int* i = NULL;
*i = 80;
}
The above code will crash immediately; however, I don't know where to find the dump file?
Thank you
解决方案
#include <Windows.h>
#include <Dbghelp.h>
void make_minidump(EXCEPTION_POINTERS* e)
{
auto hDbgHelp = LoadLibraryA("dbghelp");
if(hDbgHelp == nullptr)
return;
auto pMiniDumpWriteDump = (decltype(&MiniDumpWriteDump))GetProcAddress(hDbgHelp, "MiniDumpWriteDump");
if(pMiniDumpWriteDump == nullptr)
return;
char name[MAX_PATH];
{
auto nameEnd = name + GetModuleFileNameA(GetModuleHandleA(0), name, MAX_PATH);
SYSTEMTIME t;
GetSystemTime(&t);
wsprintfA(nameEnd - strlen(".exe"),
"_%4d%02d%02d_%02d%02d%02d.dmp",
t.wYear, t.wMonth, t.wDay, t.wHour, t.wMinute, t.wSecond);
}
auto hFile = CreateFileA(name, GENERIC_WRITE, FILE_SHARE_READ, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
if(hFile == INVALID_HANDLE_VALUE)
return;
MINIDUMP_EXCEPTION_INFORMATION exceptionInfo;
exceptionInfo.ThreadId = GetCurrentThreadId();
exceptionInfo.ExceptionPointers = e;
exceptionInfo.ClientPointers = FALSE;
auto dumped = pMiniDumpWriteDump(
GetCurrentProcess(),
GetCurrentProcessId(),
hFile,
MINIDUMP_TYPE(MiniDumpWithIndirectlyReferencedMemory | MiniDumpScanMemory),
e ? &exceptionInfo : nullptr,
nullptr,
nullptr);
CloseHandle(hFile);
return;
}
LONG CALLBACK unhandled_handler(EXCEPTION_POINTERS* e)
{
make_minidump(e);
return EXCEPTION_CONTINUE_SEARCH;
}
int main()
{
SetUnhandledExceptionFilter(unhandled_handler);
return *(int*)0;
}
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