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LLVM基础学习:使用VSCode+GDB 调试 out-of-tree 的 LLVM Pass 的配置

作者:互联网

 

使用VSCode+GDB 调试 out-of-tree 的 LLVM Pass 的配置

 

时间:20220620,版本:V0.1

作者:robotech_erx

 

使用GDB调试文件比较多的项目还是很累的。

尝试了GDBGui等前端,还是感觉VScode,Eclipse这些成熟的IDE作为前端更好。

 

VScode调试 LLVM Pass 的配置:

 

1.设置llvm的包含路径:

C++的配置文件.vscode/c_cpp_properties.json

{

    "configurations": [

        {

            "name": "Linux",

            "includePath": [

                "${workspaceFolder}/**",

                "/home/WorkTable/llvm1301/include/**" # 就是这里

            ],

            "defines": [],

            "compilerPath": "/usr/bin/gcc",

            "cStandard": "gnu17",

            "cppStandard": "gnu++14",

            "intelliSenseMode": "linux-gcc-x64"

        }

    ],

    "version": 4

}

 

2.配置.vscode/launch.json

生成launch.json的时候选择(gdb)launch模板。

主要是两个配置:

"program" :被调试的程序,这里是opt程序

 "args":参数,就是把上个文章里的参数填到这里了。

{

    // Use IntelliSense to learn about possible attributes.

    // Hover to view descriptions of existing attributes.

    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387

    "version": "0.2.0",

    "configurations": [

        {

            "name": "(gdb) Launch",

            "type": "cppdbg",

            "request": "launch",

            "program": "/home/jack/worktable/llvm1301/bin/opt", #这里

            "args": [ "-enable-new-pm=0","-load","/home/path/to/libHelloWorld.so","-legacy-hello-world","/home/path/to/input_for_hello.ll","-o","/dev/null"],  #这里

            "stopAtEntry": false,

            "cwd": "${fileDirname}",

            "environment": [],

            "externalConsole": false,

            "MIMode": "gdb",

            "setupCommands": [

                {

                    "description": "Enable pretty-printing for gdb",

                    "text": "-enable-pretty-printing",

                    "ignoreFailures": true

                },

                {

                    "description":  "Set Disassembly Flavor to Intel",

                    "text": "-gdb-set disassembly-flavor intel",

                    "ignoreFailures": true

                }

            ]

        }

    ]

}

 

3.下断点。

在源码里下好断点,F5就行了。没有opt的源码不重要,GDB会自动定位到有的那部分,然后断下来。

 

注意:

 "args":参数,不要整个参数放到一个字符串里,会出错。

"args": [ "-enable-new-pm=0  -load /home/xxx/libHelloWorld.so -legacy-hello-world  /home/xxx/input_for_hello.ll -o /dev/null"], 

opt会报错:

opt: for the --enable-new-pm option: '0  -load /home/xxx/libHelloWorld.so -legacy-hello-world  /home/xxx/input_for_hello.ll -o /dev/null' is invalid value for boolean argument! Try 0 or 1

0 以及后面的都识别了一个。写成json的格式也不行,像上面那样才行。

标签:opt,LLVM,VSCode,tree,GDB,gdb,home,hello
来源: https://www.cnblogs.com/robotech/p/16394617.html