在类中检测到堆损坏(删除后)，但仅在dll(而非exe)中使用时才会触发 [英] Heap corruption detected in class (after delete) but is only triggered when used within a dll, not an exe

问题描述

我有一个用于套接字通信的类(旧代码，不是我写的)，当我这样做时(出于测试目的)，我试图对其进行清理:

 CCommSocket * tst = 新 CCommSocket;
删除 tst; 

在dll中使用该代码时，我收到一个堆损坏调试错误，因为我看不到任何可能导致该类出现的东西，所以我将该类放入了主exe文件中，并且没有新闻/删除.问题.我猜想这与dll中的类有关.任何人都不知道是什么会导致堆损坏问题，例如在dll中而不是exe中吗?

...而且是的，这两个调用在dll中都紧挨着(暂时)...

-更新-
CCommSocket的基类有一个bool，我将其重铸为BOOL，现在它可以正常工作.真的没有意义，特别是因为该类中还有另一个bool. :doh:

-已解决-
http://www.codeproject.com/Messages/3797525/Re-class-size-doesnt-seem-to-be-determined-correct.aspx [解决方案

<似乎正在使用MFC作为DLL问题的一部分.您可能需要检查以下链接.

http://msdn.microsoft.com/en-us/library/zfz4xb9a.aspx [ ^ ]

http://msdn.microsoft.com/en-us/library/hw85e4bb.aspx [ ^ ]

在类之前的某个地方是否有任何#pragma pack(#)或__declspec(align(#))指令(可能会影响它)?

如果``基类''实现为预编译形式，或者在共享库中使用MFC时是MFC类，则默认打包支持为4(对于x86).如您所知，BOOL被定义为"int"类型，其大小为4个字节，而bool为1个字节.

I have a class that I use for socket communications (old code, not written by me) that I''m attempting to clean up, when I do this (for testing purposes):

CCommSocket *tst = new CCommSocket;
delete tst;

I get a heap corruption debug error when the code is used in a dll, since I couldn''t see anything that could cause that within the class, I took the class and placed it within the main exe and it news/deletes with no problem. I''m guessing this has something to do with the class being in the dll. Anyone have any idea what would cause a heap corruption problem such as this within a dll and not an exe?

...and yes, the calls are right next to one another (for now), both within the dll...

--Update--
The base class for CCommSocket had a bool that I recast to BOOL and now it works fine. Doesn''t really make sense, specially because there''s another bool in the class as well. :doh:

--SOLVED--
http://www.codeproject.com/Messages/3797525/Re-class-size-doesnt-seem-to-be-determined-correct.aspx[^]

解决方案

It seems to be using MFC as part of a DLL issue. You may need to check following links.

http://msdn.microsoft.com/en-us/library/zfz4xb9a.aspx[^]

http://msdn.microsoft.com/en-us/library/hw85e4bb.aspx[^]

Is there any #pragma pack(#) or __declspec(align(#)) directive somewhere (may affect it) before your class?

If the base class'' implementation is in pre-compiled form or it is an MFC class while using MFC in shared libs, default packing alingment is 4 (for x86). As you may know, BOOL is defined as type "int" which is 4 bytes in size while bool is 1 byte.

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