在Windows XP下崩溃在CAtlStringMgr :: GetInstance [英] Crash in CAtlStringMgr::GetInstance under Windows XP

问题描述

我写了一个DLL，创建一个ATL CString对象。我使用Visual Studio 2015 - Windows XP（v140_xp）平台工具集在Visual Studio 2015中编译。使用LoadLibrary / GetProcAddress加载DLL。

在分配字符串对象时，在CAtlStringMrg :: GetInstance中，它在Windows XP下崩溃。

这是反汇编：

 
 code> static IAtlStringMgr * GetInstance（）
 {
 #pragma warning（push）
 #pragma warning（disable：4640）
 static CWin32Heap strHeap（:: GetProcessHeap ））; 
 1003B100 mov eax，dword ptr fs：[0000002Ch] 
 1003B106 mov ecx，dword ptr [__tls_index（101B46C8h）] 
 1003B10C push esi 
 
 ***是导致崩溃的指令。 eax和ecx为零。 *** 
 1003B10D mov esi，dword ptr [eax + ecx * 4] 
  

你可以看到代码引用__tls_index，因此它使用线程本地存储。 dumpbin也显示了一个.tls部分，当我用旧的Visual Studio 2013编译我的项目时不存在。

在Windows XP上不支持线程本地存储动态加载。这解释了为什么上面的代码崩溃。

但是，我不知道为什么使用线程本地存储。我找不到__declspec（线程）在ATL源的任何地方。

我正在寻找一个修复/解决方法（除了从VS2015回到VS2013）。

此问题已报告给Microsoft，但他们尚未评论/修正： https://connect.microsoft.com/VisualStudio/feedback/details/1635157/crash-in-catlstringmrg -getinstance-under-windows-xp

解决方案

感谢David指向正确的方向。以下是解决方法：

属性 - > C / C ++ - >命令行 - >添加/ Zc：threadSafeInit -

相关文件：

https://connect.microsoft.com/VisualStudio/feedback/details/1715018/ dll-usage-of-thread-safe-magic-statics-may-crash-on-windows-xp

静态初始化存取违规

https ：//connect.microsoft.com/VisualStudio/feedback/details/1789709/visual-c-2015-runtime-broken-on-windows-server-2003-c-11-magic-statics

https：// msdn。 microsoft.com/en-us/library/vstudio/hh567368.aspx

I've written a DLL that creates an ATL CString object. I compile it with Visual Studio 2015 using the "Visual Studio 2015 - Windows XP (v140_xp)" platform toolset. The DLL is loaded using LoadLibrary/GetProcAddress.

It crashes under Windows XP in CAtlStringMrg::GetInstance when allocating the string object. The same application works well on Windows Vista and later.

Here is the disassembly:

    static IAtlStringMgr* GetInstance()
    {
#pragma warning(push)
#pragma warning(disable: 4640)
        static CWin32Heap strHeap( ::GetProcessHeap() );
1003B100 mov         eax,dword ptr fs:[0000002Ch] 
1003B106 mov         ecx,dword ptr [__tls_index (101B46C8h)] 
1003B10C push        esi 

*** This is the instruction that causes the crash. eax and ecx are zero. ***
1003B10D mov         esi,dword ptr [eax+ecx*4]

As you can see the code references __tls_index, thus it uses thread local storage. dumpbin also shows a .tls section that is not present when I compile my project with the old Visual Studio 2013.

Thread local storage is not supported on Windows XP when a DLL is loaded dynamically. This explains why the code above crashes.

However, I could not figure out why thread local storage is used. I can't find __declspec(thread) anywhere in the ATL sources.

I'm looking for a fix/workaround (other than going back from VS2015 to VS2013).

The issue has already been reported to Microsoft, but they did not comment/fix it yet: https://connect.microsoft.com/VisualStudio/feedback/details/1635157/crash-in-catlstringmrg-getinstance-under-windows-xp

解决方案

Thanks to David to point me in the right direction. Here's the workaround:

Properties -> C/C++ -> Command Line -> add "/Zc:threadSafeInit-"

Related documents:

https://connect.microsoft.com/VisualStudio/feedback/details/1715018/dll-usage-of-thread-safe-magic-statics-may-crash-on-windows-xp

Access violation on static initialization

https://connect.microsoft.com/VisualStudio/feedback/details/1789709/visual-c-2015-runtime-broken-on-windows-server-2003-c-11-magic-statics

https://msdn.microsoft.com/en-us/library/vstudio/hh567368.aspx

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