关于DLL里定位内存泄露

[j20j10b]

1， char * lpszText = T2A(bCode.GetBuffer(bCode.GetLength()));

这样的指针赋值会造成内存泄露吗？ 用完如何删除？






2， 另外在DLL里定位内存泄露语句， 用下面代码没找到， 如何在DLL里定位内存泄露位置？


#define _CRTDBG_MAP_ALLOC
// 用于将malloc和free函数重定向至DEBUG版本，使之能输出对应的源文件及行号。

#include <crtdbg.h>

#ifdef _DEBUG
#define new new(_CLIENT_BLOCK, __FILE__, __LINE__)
#endif



InitInstance()里

#ifdef _DEBUG
_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF| _CRTDBG_LEAK_CHECK_DF);
_CrtDumpMemoryLeaks();
_CrtSetReportMode( _CRT_ERROR, _CRTDBG_MODE_DEBUG );

#endif

[赵4老师]

CString::GetBuffer LPTSTR GetBuffer( int nMinBufLength ); throw( CMemoryException ); Return Value An LPTSTR pointer to the object’s (null-terminated) character buffer. Parameters nMinBufLength The minimum size of the character buffer in characters. This value does not include space for a null terminator. Remarks Returns a pointer to the internal character buffer for the CString object. The returned LPTSTR is not const and thus allows direct modification of CString contents. If you use the pointer returned by GetBuffer to change the string contents, you must call ReleaseBuffer before using any other CString member functions. The address returned by GetBuffer may not be valid after the call to ReleaseBuffer since additional CString operations may cause the CString buffer to be reallocated. The buffer will not be reallocated if you do not change the length of the CString. The buffer memory will be freed automatically when the CString object is destroyed. Note that if you keep track of the string length yourself, you should not append the terminating null character. You must, however, specify the final string length when you release the buffer with ReleaseBuffer. If you do append a terminating null character, you should pass –1 for the length to ReleaseBuffer and ReleaseBuffer will perform a strlen on the buffer to determine its length. Example The following example demonstrates the use of CString::GetBuffer. // example for CString::GetBuffer CString s( "abcd" ); #ifdef _DEBUG afxDump << "CString s " << s << "\n"; #endif LPTSTR p = s.GetBuffer( 10 ); strcpy( p, "Hello" ); // directly access CString buffer s.ReleaseBuffer( ); #ifdef _DEBUG afxDump << "CString s " << s << "\n"; #endif CString Overview | Class Members | Hierarchy Chart See Also CString::GetBufferSetLength, CString::ReleaseBuffer