VS Code调试C程序时执行到main结尾跳转crtexe.c问题修复

在Visual Studio Code中调试C程序时遇到异常：执行到main(int argc, char** argv)函数的闭合大括号后，按下F10键不会自动结束调试，而是打开路径C:\M\mingw-w64-crt-git\src\mingw-w64\mingw-w64-crt\crt\crtexe.c下的空crtexe.c文件。

我的C代码 #

#include <stdio.h>
int main(int argc, char** argv)
{
  int first, second, temp;
  printf("Enter first number: ");
  scanf("%d", &first);
  printf("Enter second number: ");
  scanf("%d", &second);

  // value of first is assigned to temp
  temp = first;

  // value of second is assigned to first
  first = second;

  // value of temp (initial value of first) is assigned to second
  second = temp;

  // %.2lf displays number up to 2 decimal points
  printf("\nAfter swapping, first number = %d\n", first);
  printf("After swapping, second number = %d\n", second);
  return 0;
}

我的launch.json配置 #

{
"version": "0.2.0",
"configurations": [
    {
        "name": "C/C++: g++ build and debug active file",
        "type": "cppdbg",
        "request": "launch",
        "program": "${workspaceFolder}\\a.out",
        "args": [],
        "stopAtEntry": false,
        "cwd": "${workspaceFolder}",
        "environment": [],
        "externalConsole": false,
        "MIMode": "gdb",
        "miDebuggerPath": "C:\\msys64\\mingw64\\bin\\gdb.exe",
        "setupCommands": [
            {
                "description": "Enable pretty-printing for gdb",
                "text": "-enable-pretty-printing",
                "ignoreFailures": true
            }
        ],
        "preLaunchTask": "C/C++: g++ build active file"
    },
    {
        "name": "(Windows) launch",
        "type": "cppvsdbg",
        "request": "launch",
        "program": "${workspaceFolder}/a.exe",
        "args": [],
        "stopAtEntry": false,
        "cwd": "${fileDirname}",
        "environment": [],
        "console": "externalTerminal"
    }
]
}

已安装插件 #

• C/C++(Microsoft)
• C/C++ Extension Pack(Microsoft)
• C/C++ Themes
• CMake
• Cmake Tools
• Code Runner

修复方案 #

1. 修正可执行文件路径 #

Windows平台下MinGW编译生成的是.exe格式的可执行文件，将第一个调试配置（cppdbg类型）中的program路径从"${workspaceFolder}\\a.out"改为"${workspaceFolder}\\a.exe"，确保调试器指向正确的目标程序。

2. 添加自动终止调试配置 #

在cppdbg类型的配置中添加"exitOnDebuggeeExit": true，该配置会让调试器在目标程序退出时自动终止调试会话，避免进入CRT的后续清理代码。修改后的配置片段如下：

{
    "name": "C/C++: g++ build and debug active file",
    "type": "cppdbg",
    "request": "launch",
    "program": "${workspaceFolder}\\a.exe",
    "args": [],
    "stopAtEntry": false,
    "cwd": "${workspaceFolder}",
    "environment": [],
    "externalConsole": false,
    "MIMode": "gdb",
    "miDebuggerPath": "C:\\msys64\\mingw64\\bin\\gdb.exe",
    "exitOnDebuggeeExit": true,
    "setupCommands": [
        {
            "description": "Enable pretty-printing for gdb",
            "text": "-enable-pretty-printing",
            "ignoreFailures": true
        }
    ],
    "preLaunchTask": "C/C++: g++ build active file"
}

3. 调整调试操作 #

当调试到main函数的闭合大括号后，使用**F5（继续运行）**代替F10（单步执行），这样程序会直接完成CRT的清理流程并退出调试会话，不会单步进入CRT的源码文件。

内容的提问来源于stack exchange，提问作者Siarhei Ionushas