线程问题. “挂钩" [英] Thread Problem. "Hook"

问题描述

你好，

再一次，我有问题.

我创建了一个DLL，它在目标应用程序中设置了一些钩子.但是我有一个功能的问题.我们称之为ParseData.
我迷上了这个函数，所有传入的数据都显示在ListCtrl中.
我有3个实际上调用此函数的类.
第一个主类将ParseData的地址传递给其余2个类.
喜欢:

Hello,

Once again, I have problem.

I created an DLL that sets few hooks into target application. But I have problem with one function. Let''s call it ParseData.
I hooked this function and any data coming through are displayed in ListCtrl.
I have 3 classes that actually calls this function.
The first master class passes address of the ParseData to 2 remaining classes.
Like:

...
*(DWORD*)&ParseData = m_pParseDataAddress; // Set the function call for MasterClass 
m_SomeDlg->SetParseDataFunction(m_pParseDataAddress); // Pass the addr to class 2
m_Para.SetParseDataFunction(m_pParseDataAddress); // Pass the addr to class 3
...

当m_SomeDlg调用ParseData时，它将经过钩子，并且数据显示在ListCtrl中.

但是m_Para通过以下命令在某个时刻创建新线程:

When m_SomeDlg calls ParseData, it goes though hook and data are displayed in ListCtrl.

m_Para however creates new thread at some point via command:

...
// IN COMMAND HANDLER
	if( strcmp(chCommand, "Load") == 0)
	{
		Init();
		m_bActivated = true;
		_beginthread((void (__cdecl *)(void *))&ProcThreadAddr, 0, (void*)this);
	}
...

void __cdecl CPara::ProcThreadAddr(CPara * ParaPtr)
{
	ParaPtr->MainThread();
	_endthread();
}

在MainThread中有一个while循环，用于检查m_bActivated = true.
但是，从此线程对ParseData的任何调用都不会显示在钩子中(但是会解析数据)

当我从任何地方调用ParseData时，数据都显示在钩子中，但是当我从MainThread调用它时，它不显示任何内容.

这对我来说真的很奇怪.

谢谢您的帮助.

In MainThread there is a while loop which checks if m_bActivated = true.
However any calls to ParseData from this thread aren''t displayed in hook (Data is parsed however)

When I call ParseData from any place, data is displayed in hook, but when I call it from MainThread it doesn''t display anything.

That''s actually pretty strange for me.

Thank you for your help.

推荐答案

Agghhh，我想我现在知道问题了.我失去的所有宝贵时间...该死.

无论如何-让我解释一下其他可能存在相同问题的其他编码器的解决方案/问题:

我没有使用常规断点或弯路/jmp.我正在使用硬件断点.但是，这些断点设置在线程上下文中.并且由于新线程是在设置挂钩之后创建的，因此它不包含硬件断点.

我怎么发现错了?我只是将钩子的地址传递给了m_Para类.
m_Para.SetParseDataFunction(&ParseDataHook);

Agghhh, I guess I know the problem now. All the precious time I lost... Damn it.

Anyways - Let me explain the solution/problem for any other coders that might have same issue:

I''m not using regular breakpoints or detour/jmp. I''m using Hardware breakpoints. However those breakpoints are set into thread context. And because the new thread is created after setting up hooks, it doesn''t contain hardware breakpoints.

How I found what''s wrong? I simply passed address of hook to m_Para class.
m_Para.SetParseDataFunction(&ParseDataHook);

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