从C ++中的Export DLL返回值时，程序崩溃 [英] Program Crash While returning Value from Export DLL in C++

问题描述

这是我的ABC.DLL标头

Hi,

Here is my ABC.DLL Header

extern "C"
{
  __declspec(dllexport) unsigned int CallFile(string, string);
}

class __declspec(dllexport) CPW
{
  Convert();
};

在ABC.DLL CPP中

In ABC.DLL CPP

__declspec(dllexport) unsigned int CallFile(string str1, string str2)
{
  CPW *pR = new CPW();
  unsigned int nStatus = pR->File(str1, str2);
  
  if (pRAWFileConverter)
   delete pRAWFileConverter;

  return nReaderStatus;
}

现在，我将AS.EXE调用为

Now I am calling in my AS.EXE as

typedef unsigned int (*EntryPointfuncPtr)(string argv_1, string argv_2);

string Lib_File = "ABC.dll";
HINSTANCE LoadMe = LoadLibrary(Lib_File.c_str());
EntryPointfuncPtr LibMainEntryPoint = (EntryPointfuncPtr)GetProcAddresS(LoadMe, "CallFile");

if (LibMainEntryPoint != NULL)
{
  cout << "MESSAGE SENT" << endl;
}
string str1 = "abc.txt";
string str2 = "ytr.txt";

unsigned int nReaderStatus = LibMainEntryPoint(str1, str2); 

FreeLibrary(LoadMe);

当"CallFile"函数返回值时，它将崩溃.
任何帮助!!

When "CallFile" function is returning value, it is getting crashed.
Any Help!!

推荐答案

返回错误与堆栈问题有关(主要是)
所以
1-检查参数是否超出范围
2-检查您的通话转换(std call，cdecl，...)

正如我在您的代码中看到的那样，问题返回到__cdecl调用
使用__stdcall代替__declspec

Error in returns is about stack problem(mostly)
so
1 - check your parameter out of bound write
2 - check your calling conversion (std call , cdecl ,... )

as i see in ur code the problem returns to __cdecl call
use __stdcall Instead of __declspec

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