GetThreadContext和SetThreadContext

Posted 2020-12-10 ganxiang

 

#include "stdafx.h" 
#include <iostream>
#include <windows.h>

using namespace std;

DWORD WINAPI ThreadProc(LPVOID lpParamter)
{
    for (int i = 0;i<10;i++)
    {
        Sleep(1000);
        printf("ThreadProc1********* %d
",i);
    }
    return 0;
}

DWORD WINAPI ThreadProc1(LPVOID lpParamter)
{
    for (int i = 0;i<50;i++)
    {
        Sleep(100);
        printf("ThreadProc1********* %d
",i);
    }
    return 0;
}

DWORD WINAPI ThreadProc2(LPVOID lpParamter)
{
    for (int j = 0;j<50;j++)
    {
        Sleep(50);
        printf("ThreadProc2********* %d
",j);
    }
    return 5;
}

int main()
{
    //unsigned long ulThreadId = 0;
    HANDLE hThread[2];
    DWORD dwr1;
    DWORD dwr2;


    hThread[0] = CreateThread(NULL, 0, ThreadProc1, NULL, 0, NULL);
    //hThread[1] = CreateThread(NULL, 0, ThreadProc2, NULL, 0, NULL);

    //Sleep(2000);
    SuspendThread(hThread[0]);

    CONTEXT context;
    context.ContextFlags = CONTEXT_INTEGER;

　　//从线程获取寄存器的值存入context
    GetThreadContext(hThread[0],&context);
    printf("%x -- %x
",context.Eax,context.Ecx);
    
    context.Eax = 1;
    context.Ecx = 2;

　　//把修改好的context传入thread
    SetThreadContext(hThread[0],&context);
    printf("%x -- %x
",context.Eax,context.Ecx);
    GetThreadContext(hThread[0],&context);
    printf("%x -- %x
",context.Eax,context.Ecx);


    ResumeThread(hThread[0]);

//     WaitForMultipleObjects(2,hThread,TRUE,INFINITE);
//     GetExitCodeThread(hThread[0],&dwr1);
//     GetExitCodeThread(hThread[1],&dwr2);
    
    cout << "线程结束了！" <<endl;

    getchar();
    CloseHandle(hThread[0]);
    CloseHandle(hThread[1]);

    //system("pause");
    return 0;
}