CLion 远程模式

发现 Clion 也能进行远程调试了。

真是与时俱进的呢～

按照这个官方教程来进行配置。

由于我的远程机器 CMake/GCC/G++/GDB 版本都比较低（CLion 要求的版本都比较高），而且没有 sudu 权限，所以就用 conda 新建了一整套环境：

conda create --name my_workspace
conda activate my_workspace
conda install -c conda-forge binutils cmake make 
conda install -c conda-forge gdb # 这个有可能会安不上

然后 CLion 中制定 env 的 lib 路径即可。

配置好之后，发现 HelloWorld 本地编译 OK，远端编译失败。看 Log 好像是由于 pthread 导致的。那么修改 CMakeLists 如下：

cmake_minimum_required(VERSION 3.14)
project(CPPPlayground)

set(CMAKE_CXX_STANDARD 17)

find_package (Threads)
add_executable(CPPPlayground main.cpp)
target_link_libraries (CPPPlayground ${CMAKE_THREAD_LIBS_INIT})

然后测试代码如下

#include <iostream>
#include <memory>
#include <thread>
#include <chrono>
#include <mutex>
#include <sys/utsname.h>

struct Base {
    Base() { std::cout << "  Base::Base()\n"; }
    // 注意：此处非虚析构函数 OK
    ~Base() { std::cout << "  Base::~Base()\n"; }
};

struct Derived : public Base {
    Derived() { std::cout << "  Derived::Derived()\n"; }
    ~Derived() { std::cout << "  Derived::~Derived()\n"; }
};

void thr(std::shared_ptr<Base> p) {
    std::this_thread::sleep_for(std::chrono::seconds(1));
    std::shared_ptr<Base> lp = p; // 线程安全，虽然自增共享的 use_count1
    {
        static std::mutex io_mutex;
        std::lock_guard<std::mutex> lk(io_mutex);
        std::cout << "local pointer in a thread:\n"
                  << "  lp.get() = " << lp.get()
                  << ", lp.use_count() = " << lp.use_count() << '\n';
    }
}

int main() {

    // 测试代码编译环境
    struct utsname name;
    std::cout << "I am on "
              #ifdef __linux__
              << "Linux"
              #elif __APPLE__
              <<"Mac OS"
              #endif
              << name.release << std::endl;
    // 测试thread和C++11标准
    std::shared_ptr<Base> p = std::make_shared<Derived>();
    std::cout << "Created a shared Derived (as a pointer to Base)\n"
              << "  p.get() = " << p.get()
              << ", p.use_count() = " << p.use_count() << '\n';
    std::thread t1(thr, p), t2(thr, p), t3(thr, p);
    p.reset(); // 从 main 释放所有权
    std::cout << "Shared ownership between 3 threads and released\n"
              << "ownership from main:\n"
              << "  p.get() = " << p.get()
              << ", p.use_count() = " << p.use_count() << '\n';
    t1.join();
    t2.join();
    t3.join();
    std::cout << "All threads completed, the last one deleted Derived\n";
}

参考资料

• Remote Debug via GDB/gdbserver
• Full Remote Mode