vscode linux debug skills & vscode settings.json & launch.json
- vscode 在虚拟机中运行需要禁用 3D 加速。或者在 .bashrc 中添加
alias code="code --disable-gpu" - settings.json 常用配置：
{
"git.enabled": false, // 关掉vscode git插件
// Controls if quick suggestions should show up while typing
"editor.quickSuggestions": {
"other": true,
"comments": false,
"strings": true
},
"files.exclude": { // 去除某些目录
"*build": true,
"*.tar.gz": true,
"*.zip": true
},
"search.exclude": { // 去除某些目录中的搜索
"*build": true,
"*.tar.gz": true,
"*.zip": true
},
// Controls if suggestions should be accepted on 'Enter' - in addition to 'Tab'. Helps to avoid ambiguity between inserting new lines or accepting suggestions. The value 'smart' means only accept a suggestion with Enter when it makes a textual change
"editor.acceptSuggestionOnEnter": "on",
// Controls the delay in ms after which quick suggestions will show up.
"editor.quickSuggestionsDelay": 10,
// Controls if suggestions should automatically show up when typing trigger characters
"editor.suggestOnTriggerCharacters": true,
// Controls if pressing tab inserts the best suggestion and if tab cycles through other suggestions
"editor.tabCompletion": "on",
// Controls whether sorting favours words that appear close to the cursor
"editor.suggest.localityBonus": true,
// Controls how suggestions are pre-selected when showing the suggest list
"editor.suggestSelection": "recentlyUsed",
// Enable word based suggestions
"editor.wordBasedSuggestions": true,
"editor.parameterHints.enabled": true,
"workbench.tree.indent": 20, // Explorer 中目录树的宽度
"editor.mouseWheelScrollSensitivity": 2,
"editor.smoothScrolling": false,
"editor.trimAutoWhitespace": true,
"files.trimTrailingWhitespace": true, // 保存时自动删除行尾的空格
"editor.renderWhitespace": "all", // 将空格显示为 "."
"C_Cpp.clang_format_style": "Google", // c++ format格式
"C_Cpp.errorSquiggles": "Disabled",
"C_Cpp.default.cppStandard": "c++11",
"C_Cpp.loggingLevel": "Debug",
}
- 常用 debug 配置文件：
{
"name": "(gdb) Debug1",
"type": "cppdbg",
"request": "launch",
"program": "/home/key/ws/hello.out",
"args": ["param1", "param2"],
"stopAtEntry": true,
"cwd": "/home/key/ws/",
"environment": [], //, {"name":"alloc_dealloc_mismatch", "value":"0"}],
"externalConsole": false,
"MIMode": "gdb",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
]，
"logging": { "engineLogging": true } // 输出信息到Debug Console
},
{
"name": "(gdb) Docker Launch1",
"type": "cppdbg",
"request": "launch",
"program": "/opt/hello.out",
"cwd": "/root",
"args": [],
"stopAtEntry": true,
"environment": [],
"externalConsole": false,
"pipeTransport": {
"debuggerPath": "/usr/bin/gdb",
"pipeProgram": "docker",
"pipeArgs": ["exec", "-i", "dockerName", "bash", "-c"], // bahs -c: read string as cmd
"pipeCwd": "${workspaceRoot}"
},
// "sourceFileMap": {
// "/root/src":"/home/user/ws/src" // option, 需要从docker中复制一份src到 /home/user/ws 中。
// },
"MIMode": "gdb",
"setupCommands": [{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}]
},
注意，如果希望vscode debug 运行在docker中的程序，则需要在这样启动docker: docker run --privileged xxx （提升所有权限）或者 docker run --security-opt="seccomp=unconfined" --cap-add=SYS_PTRACE xxx (disable address space randomization + enable PTRACE).
- vscode Debug 查看函数返回值: step into 函数，然后再 vscode DEBUG CONSOLE 中输入
"-exec finish" - vscode Debug子进程：需要提前在子进程中打上断点, 并且 break before
fork&&"-exec -gdb-set follow-fork-mode child" - vscode Debug 查看某个地址的内存值：
-exec x/4ub 0x555556e9ba10 或者 -exec x/4xb
VSCode快捷键：
https://code.visualstudio.com/shortcuts/keyboard-shortcuts-linux.pdf
按住 shift + 鼠标点选 （块选，多行选择）
Alt + Shift + 上下 (上下多光标）
Alt + Shift + 左右 (左右单词—— word 选择)
Alt + Shift + i (在选择行的行尾插入光标)
Alt + Shift + 鼠标拖动 (多光标快选)
Alt + 鼠标点击 （单个插入光标）
Ctrl + U (undo 多光标操作)
Ctrl + Shift + L (选中所有当前所选的字符串)
Ctrl + 左右 (左右移动一个单词——word)
Ctrl + L (单行选择——配合Ctrl+C Ctrl+V实现复制一行)
Ctrl + P (打开文件)
以上配合 Ctrl K + Ctrl F (format当前所选)，以及 Ctrl + Shift + P
Trim Trailing Whitespace
... to be continue...