DLL中的函数如何获取调用者信息？

[EasyTDD]

DLL中的函数：
void DLLFunc();

调用者：

void caller1()
{
DllFunc();
}

void caller2()
{
DllFunc();
}

void caller3()
{
caller1();
}

有没有办法在DllFunc()中编写代码，了解到底是哪个函数调用了自己？

[iu_81]

应该在封装一下
如fun(string caller)
{
DllFunc();
cout<<caller;
}

[iu_81]

或者GetCommandLine

[9527他大爷]

传参数..........
.

[珍惜生命远离CPP]

查看栈中的信息.

[yuzl32]

StackWalk64

[iambic]

当你想这么做的时候，往往是想错了。

[yuzl32]

#include <windows.h>
#include <stdio.h>
#include <dbghelp.h>

#pragma comment( lib, "dbghelp.lib" )

void dump_callstack( CONTEXT *context )
{
 	STACKFRAME sf;
 	memset( &sf, 0, sizeof( STACKFRAME ) );
 	
 	sf.AddrPC.Offset = context->Eip;
 	sf.AddrPC.Mode = AddrModeFlat;
 	sf.AddrStack.Offset = context->Esp;
 	sf.AddrStack.Mode = AddrModeFlat;
 	sf.AddrFrame.Offset = context->Ebp;
 	sf.AddrFrame.Mode = AddrModeFlat;
 	
 	DWORD machineType = IMAGE_FILE_MACHINE_I386;
 	
 	HANDLE hProcess = GetCurrentProcess();
 	HANDLE hThread = GetCurrentThread();

 	for( ; ; )
 	{
  		if( !StackWalk(machineType, hProcess, hThread, &sf, context, 0, SymFunctionTableAccess, SymGetModuleBase, 0 ) )
  		{
   			break;
  		}

  		if( sf.AddrFrame.Offset == 0 )
  		{
  		 	break;
  		}
  		BYTE symbolBuffer[ sizeof( SYMBOL_INFO ) + 1024 ];
  		PSYMBOL_INFO pSymbol = ( PSYMBOL_INFO ) symbolBuffer;
  		
  		pSymbol->SizeOfStruct = sizeof( symbolBuffer );
  		pSymbol->MaxNameLen = 1024;
  		
  		DWORD64 symDisplacement = 0;
  		if( SymFromAddr( hProcess, sf.AddrPC.Offset, 0, pSymbol ) )
  		{
  		 	printf( "Function : %s\n", pSymbol->Name );
  		}
  		else
  		{
  		 	printf( "SymFromAdd failed!\n" );
  		}
  		
  		IMAGEHLP_LINE lineInfo = { sizeof(IMAGEHLP_LINE) };
  		DWORD dwLineDisplacement;
  		
  		if( SymGetLineFromAddr( hProcess, sf.AddrPC.Offset, &dwLineDisplacement, &lineInfo ) )
  		{
  		 	printf( "[Source File : %s]\n", lineInfo.FileName ); 
  		 	printf( "[Source Line : %u]\n", lineInfo.LineNumber ); 
  		}
  		else
  		{
  		 	printf( "SymGetLineFromAddr failed!\n" );
  		}
 	}
}

DWORD excep_filter( LPEXCEPTION_POINTERS lpEP )
{
 	/**//// init dbghelp.dll
 	if( SymInitialize( GetCurrentProcess(), NULL, TRUE ) )
 	{
 	 	printf( "Init dbghelp ok.\n" );
 	}
 	
 	dump_callstack( lpEP->ContextRecord );
 	
 	if( SymCleanup( GetCurrentProcess() ) )
 	{
 	 	printf( "Cleanup dbghelp ok.\n" );
 	}
 	
 	return EXCEPTION_EXECUTE_HANDLER;
}

void func1( int i )
{
 	int *p = 0;
 	*p = i;
}

void func2( int i )
{
 	func1( i - 1 );
}

void func3( int i )
{
 	func2( i - 1 );
}

void test( int i )
{
 	func3( i - 1 );
}

int main()
{
 	__try
 	{
 	 	test( 10 );
 	}
 	__except( excep_filter( GetExceptionInformation() ) )
 	{
 	 	printf( "Some exception occures.\n" );
 	} 	
 	return 0;
}

编译需要禁用优化,并添加调试信息

cmd > cl Client.cpp /Od /Zi

output:
Init dbghelp ok.
Function : func1
[Source File : e:\client.cpp]
[Source Line : 87]
Function : func2
[Source File : e:\client.cpp]
[Source Line : 92]
Function : func3
[Source File : e:\client.cpp]
[Source Line : 97]
Function : test
[Source File : e:\client.cpp]
[Source Line : 102]
Function : main
[Source File : e:\client.cpp]
[Source Line : 109]
Function : __tmainCRTStartup
[Source File : f:\rtm\vctools\crt_bld\self_x86\crt\src\crt0.c]
[Source Line : 318]
Function : GetCommandLineW
SymGetLineFromAddr failed!
Cleanup dbghelp ok.
Some exception occures.