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Add sample CodeLLDB launch.json #1482

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Feb 15, 2023
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Add sample CodeLLDB launch.json #1482

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6761db5
Add sample CodeLLDB launch.json
AE1020 Oct 12, 2022
37ad7a1
Update src/compiler-debugging.md
spastorino Feb 15, 2023
19245e4
Update src/compiler-debugging.md
spastorino Feb 15, 2023
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34 changes: 34 additions & 0 deletions src/compiler-debugging.md
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Expand Up @@ -307,3 +307,37 @@ error: aborting due to previous error
```

[`Layout`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_target/abi/struct.Layout.html


## Configuring CodeLLDB for debugging `rustc`

If you are using VSCode, and have edited your `config.toml` to request debugging
level 1 or 2 for the parts of the code you're interested in, then you should be
able to use the [CodeLLDB] extension in VSCode to debug it.

Here is a sample `launch.json` file, being used to run a stage 1 compiler direct
from the directory where it is built (does not have to be "installed"):

```javascript
// .vscode/launch.json
{
"version": "0.2.0",
"configurations": [
{
"type": "lldb",
"request": "launch",
"name": "Launch",
"args": [], // array of string command-line arguments to pass to compiler
"program": "${workspaceFolder}/build/TARGET/stage1/bin/rustc",
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let's please use host here now that it exists so people don't have to edit the file by hand

"windows": { // applicable if using windows
"program": "${workspaceFolder}/build/x86_64-pc-windows-msvc/stage1/bin/rustc.exe"
},
"cwd": "${workspaceFolder}", // current working directory at program start
"stopOnEntry": false,
"sourceLanguages": ["rust"]
}
]
}
```

[CodeLLDB]: https://marketplace.visualstudio.com/items?itemName=vadimcn.vscode-lldb