gdb多线程

gdb测试代码

#include <iostream>
using namespace std;
#include <string>
#include <mutex>
#include <thread>

class test
{
public:
    test()
    {
    }
    ~test()
    {
    }
    static void do_work1()
    {
        cout << "do work 1" << endl;
        std::this_thread::sleep_for(std::chrono::seconds(2));
        cout << "do work 1 exit" << endl;
  
    }
    void do_work2()
    {
        cout << "do work 2" << endl;
        std::this_thread::sleep_for(std::chrono::seconds(2));
        cout << "do work 2 exit" << endl;
    }
    void do_work3(string arg, int x, int y)
    {
        cout << "do work 3 x=" << x << "y=" << y << endl;
        std::this_thread::sleep_for(std::chrono::seconds(2));
        cout << "do work 3 exit" << endl;
    }
};

void test_thread(int &data)
{
    cout << "thread data=" << data << endl;
    std::this_thread::sleep_for(std::chrono::seconds(2));
        cout << "do datathread exit" << endl;

}
int main()
{
    int data=10;
    thread t1(&test_thread,ref(data));
    thread t2(&test::do_work1);//静态成员函数可以直接使用对应的静态函数
    test t;
    thread t3(&test::do_work2,t);//使用普通成员函数，除了有成员函数，还要有类对象
    thread t4(&test::do_work3,t,"string",10,20);//使用普通成员函数，除了有成员函数，还要有类对象
    t1.join();
    t2.join();
    t3.join();
    t4.join();

    return 0;
}

线程相关命令

info threads	查看所有线程信息
thread find	查找线程
thread num	切换线程
b breakpoint thread id	为线程设置端点
thread apply	为线程执行命令
set scheduler-locking off/on/step	锁定线程

info threads

thread 0x7ff..(线程地址) LWP(线程pid，light weight process) at (在某一行) in （在哪个函数停下来)

thread num

切换到2号线程

thread find

使用 线程地址，lwp，线程名字都可以来查找线程

thread name

给线程改名

thread name 2

为线程设置断点

b 29 thread 5

thread apply

thread apply num (执行普通gdb的命令)

这样就不用切换线程了

查看所有线程的调用栈(线程死锁了，就可以查看不同线程的函数调用情况来解决)

thread apply 1-5 bt

//查看所有线程
thread apply all i args
//-s:不显示错误
thread apply -s all i args
//-q 不显示线程信息