Run-Time Check Failure #0,The value of ESP was not properly saved 错误解决
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调用DLL函数,出现错误
Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention.
错误原因:
你定义函数指针原型时出错。
其实你定义的没有错,但是编译器不认识而已,因为你调用的dll函数是一个远函数,而且是一个C函数,你得告诉编译器它是个c函数才行。那么你就可以在定义该函数的时候加上一句话,
FAR PASCAL 或者 __stdcall 这个就OK了。
具体做法:
比如说你要定义一个 返回类型为空,参数为空的函数指针:
typedef void (*LPFUN)(void);
这样确实跟我们dll里的函数匹配了,上面也说了,我们应该添上几个字,告诉编译器这个是一个远的C函数。
typedef void (WINAPI *LPFUN)(void);
typedef void (__stdcall *LPFUN)(void);
typedef void (FAR PASCAL *LPFUN) (void);
像上面这样定义就OK了,如果用的是VC++,那么直接用第一种定义就ok了。
注意,上面是使用 MFC (DLL)的做法。
如果是WIN32 DLL,得相应的去掉WINAPI ,__stdcall ,FAR PASCAL 这几个参数。因为WIN32 DLL 默认的入栈方式为 __cedcall方式,不是__stdcall方式。
具体的组合方式太多了,反正知道错误的原因是声明相应的函数未匹配就行了。
调用DLL里的函数 或 类成员函数 碰到此错误:
Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention.
函数定义的调用规则,和实际的调用规则不同。如 编译器默认的是__cdecl,而__stdcall 类型的函数却用了 __cdecl 的调用规则,由于编译时不会报错,结果出现了运行时异常。
所以把在函数定义中进行设置调用规则即可解决此问题。
如: typedef void (__stdcall Foo)(int a);
很久没写代码,一天几行的代码:
typedef int ( *PFUN)(HWND hWnd, LPCTSTR lpText, LPCTSTR lpCaption, UINT uType);
void CTestProcessMonitorDlg::OnBnClickedButton1()
{
// TODO: Add your control notification handler code here
//MessageBox(TEXT("Hello"), TEXT("Test"));
//typedef void (*pfv) ();
HMODULE hmod = ::LoadLibraryExW(TEXT("user32.dll"), NULL, 0);
if (hmod != NULL)
{
PFUN pFun= (PFUN)GetProcAddress(hmod, "MessageBoxW");
if (pFun != NULL)
{
pFun(m_hWnd, TEXT("Hello"), TEXT("Test"), MB_YESNO);
}
:FreeLibrary(hmod);
}
}
突然出现以下的错误:
Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention.
代码改为如下, 则问题没有了
typedef int (WINAPI *PFUN)(HWND hWnd, LPCTSTR lpText, LPCTSTR lpCaption, UINT uType);
void CTestProcessMonitorDlg::OnBnClickedButton1()
{
// TODO: Add your control notification handler code here
//MessageBox(TEXT("Hello"), TEXT("Test"));
//typedef void (*pfv) ();
HMODULE hmod = ::LoadLibraryExW(TEXT("user32.dll"), NULL, 0);
if (hmod != NULL)
{
PFUN pFun= (PFUN)GetProcAddress(hmod, "MessageBoxW");
if (pFun != NULL)
{
pFun(m_hWnd, TEXT("Hello"), TEXT("Test"), MB_YESNO);
}
::FreeLibrary(hmod);
}
}
// 调用约定出现问题,以前这样调用api也没有用上WINAPI , 现在突然就需要了,很是迷惑??? 盼知情者指点!
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