Visual Studio Code，调试子进程不起作用

Question

我有这个确切的问题： https://github.com/Microsoft/vscode-cpptools/issues/511

但是那里的解决方案不起作用。

我尝试过相同的简单示例代码，

#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>

int main()
{
    pid_t pid = fork();
    if (pid != 0) {
        printf("Main process\n");
    } else {
        printf("Forked process\n");
    }

    return 0;
}

我使用-g进行编译，我的launch.json文件如下所示。

我单击“调试”，将断点设置在第一行。在第一站，我在调试控制台下输入

-exec set follow-fork-mode child

，它返回了

=cmd-param-changed,param="follow-fork-mode",value="child"

。那么它就行不通了。它转到父进程（pid 显示不为 0）。我尝试使用

{"text": "-gdb-set follow-fork-mode child"}

在 launch.json 文件本身中设置它，但这也不起作用。

{
        "version": "0.2.0",
        "configurations": [

        { 
            "name": "(gdb) Attach",
            "type": "cppdbg",
            "request": "attach",
            "program": "${workspaceRoot}/a.exe",
            "processId": "${command:pickProcess}",
            "MIMode": "gdb",
            "miDebuggerPath": "C:\\cygwin64\\bin\\gdb.exe"
        },
            {
                "name": "(gdb) Launch",
                "type": "cppdbg",
                "request": "launch",
                "program": "${workspaceRoot}/a.exe",
                "args": [],
                "stopAtEntry": false,
                "cwd": "${workspaceRoot}",
                "environment": [],
                "externalConsole": true,
                "MIMode": "gdb",
                "miDebuggerPath": "C:\\cygwin64\\bin\\gdb.exe",
                "setupCommands": [
                    {
                        "description": "Enable pretty-printing for gdb",
                        "text": "-enable-pretty-printing",
                        "ignoreFailures": true
                    }
                ]
            }
        ]
    }

Answer 1

我遇到了同样的问题，我解决了这个问题：

 "setupCommands": [
                    {
                        "description": "Enable funcy printing to gdb",
                        "text": "-enable-pretty-printing",
                        "ignoreFailures": true
                    },
                    {   "description":"In this mode GDB will be attached to both processes after a call to fork() or vfork().",
                        "text": "-gdb-set detach-on-fork off",
                        "ignoreFailures": true
                    },
                    {   "description": "The new process is debugged after a fork. The parent process runs unimpeded.",
                        "text": "-gdb-set follow-fork-mode child",
                        "ignoreFailures": true
                    }
                ],

Answer 2

需要2步。 首先，通过添加

来设置launch.json

{ "description": "在此模式下，GDB 将附加到两者 调用 fork() 或 vfork() 后进行的进程。", "text": "-gdb-set detach-on-fork off", “忽略失败”：正确 }, { "description": "新进程在fork后进行调试。 父进程运行畅通无阻。", "text": "-gdb-set follow-fork-mode child", “忽略失败”：正确 }

之后，你需要运行

-exec 设置 follow-fork 模式子进程

在调试程序时在调试控制台中。