打算开发个Android内核模块玩一玩，奈何我的Pixel3的内核源码和环境全配在服务器上了，只好捣鼓一下远程开发，最后选择了VSCode。

VSCode插件下载

  1. clangd
  2. Remote Development

compile_commands.json文件生成

compile_commands.json 是一个 JSON 格式的文件，用来描述一个 C/C++ 项目中所有源文件的编译信息。这个文件通常由构建系统生成（如 CMake、Bear），并被许多代码编辑器和IDE用来提供更准确的代码补全、语法检查、错误检测等功能。

compile_commands.json的生成方式根据构建系统而异，自行根据所用构建系统搜索相关方法。

有一个哥们写了一个生成的脚本，可以用它来一键生成。

vscode-linux-kernel

1
2
3
4
5
6
7
# 首先确保内核源码经过一次完整的构建
make defconfig 
make
# 进行相关配置文件的生成
# 可以不在.vscode下，自行复制输出的配置文件到.vscode下即可
git clone git@github.com:amezin/vscode-linux-kernel.git .vscode
python .vscode/generate_compdb.py -O /你的编译输出文件路径

VSCode的配置

上文提到了通过脚本来生成配置文件，可以直接用它生成的配置。

针对settings.json可以进行如下配置（clangd等路径信息改为自己的，我这里直接用x86_64的clangd了，反正编译是通过构建脚本的）:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
{
  "files.associations": {
    "iostream": "cpp",
    "intrinsics.h": "c",
    "ostream": "cpp",
    "vector": "cpp",
    "*.h": "c"
  },
  "editor.formatOnPaste": true,
  "editor.formatOnSave": true,
  "editor.formatOnType": true,
  "C_Cpp.errorSquiggles": "disabled",
  "C_Cpp.intelliSenseEngineFallback": "disabled",
  "C_Cpp.intelliSenseEngine": "disabled",
  "C_Cpp.autocomplete": "disabled",
  "clangd.path": "/usr/bin/clangd",
  "clangd.arguments": [
    "--compile-commands-dir=${workspaceFolder}/",
    "--log=verbose",
    "--pretty",
    "--all-scopes-completion",
    "--completion-style=bundled",
    "--cross-file-rename",
    "--header-insertion=iwyu",
    "--header-insertion-decorators",
    "--background-index",
    "--clang-tidy",
    "--clang-tidy-checks=cppcoreguidelines-*,performance-*,bugprone-*,portability-*,modernize-*,google-*",
    "--fallback-style=file",
    "-j=2",
    "--pch-storage=disk",
    "--function-arg-placeholders=false"
  ],
  "C_Cpp_Runner.msvcBatchPath": "",
  "C_Cpp_Runner.cCompilerPath": "gcc",
  "C_Cpp_Runner.cppCompilerPath": "g++",
  "C_Cpp_Runner.debuggerPath": "gdb",
  "C_Cpp_Runner.cStandard": "",
  "C_Cpp_Runner.cppStandard": "",
  "C_Cpp_Runner.useMsvc": false,
  "C_Cpp_Runner.warnings": [
    "-Wall",
    "-Wextra",
    "-Wpedantic",
    "-Wshadow",
    "-Wformat=2",
    "-Wcast-align",
    "-Wconversion",
    "-Wsign-conversion",
    "-Wnull-dereference"
  ],
  "C_Cpp_Runner.msvcWarnings": [
    "/W4",
    "/permissive-",
    "/w14242",
    "/w14287",
    "/w14296",
    "/w14311",
    "/w14826",
    "/w44062",
    "/w44242",
    "/w14905",
    "/w14906",
    "/w14263",
    "/w44265",
    "/w14928"
  ],
  "C_Cpp_Runner.enableWarnings": true,
  "C_Cpp_Runner.warningsAsError": false,
  "C_Cpp_Runner.compilerArgs": [],
  "C_Cpp_Runner.linkerArgs": [],
  "C_Cpp_Runner.includePaths": [],
  "C_Cpp_Runner.includeSearch": [
    "*",
    "**/*"
  ],
  "C_Cpp_Runner.excludeSearch": [
    "**/build",
    "**/build/**",
    "**/.*",
    "**/.*/**",
    "**/.vscode",
    "**/.vscode/**"
  ],
  "C_Cpp_Runner.useAddressSanitizer": false,
  "C_Cpp_Runner.useUndefinedSanitizer": false,
  "C_Cpp_Runner.useLeakSanitizer": false,
  "C_Cpp_Runner.showCompilationTime": false,
  "C_Cpp_Runner.useLinkTimeOptimization": false,
  "C_Cpp_Runner.msvcSecureNoWarnings": false,
  "files.exclude": {
    "**/.*.*.cmd": true,
    "**/.*.d": true,
    "**/.*.S": true
  },
  "[c]": {
    "editor.detectIndentation": false,
    "editor.tabSize": 8,
    "editor.insertSpaces": false,
    "editor.rulers": [
      80,
      100
    ]
  }
}

由于不知道哪里没配置对，我就在c_cpp_properties.json内又配置了一遍includePath：

需要注意的是，我是直接拉取了

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
{
  "configurations": [
    {
      "name": "linux-gcc-x64",
      "cStandard": "${default}",
      "intelliSenseMode": "linux-gcc-x64",
      "compileCommands": "${workspaceFolder}/compile_commands.json",
      "includePath": [
        "${workspaceFolder}/**",
        "${workspaceFolder}/kernel/**",
        "${workspaceFolder}/kernel/google/bluecross/**",
        "${workspaceFolder}/kernel/google/bluecross/drivers",
        "${workspaceFolder}/kernel/google/bluecross/kernel",
        "${workspaceFolder}/kernel/google/bluecross/include/**",
        "${workspaceFolder}/kernel/google/bluecross/arch/arm64/include/**",
      ],
      "cppStandard": "${default}",
      "compilerPath": "/usr/bin/gcc"
    }
  ],
  "version": 4
}

参考文章: