Yes, VSCode can debug Rust programs, but it requires installing rust-analyzer, CodeLLDB extension and lldb or gdb debuggers. After configuring launch.json and setting breakpoints, you can start debugging through F5, check variables, step-by-step execution, and evaluate expressions. Although it is not as convenient as languages ??such as JavaScript, efficient debugging can be achieved through correct configuration.
Debugging a Rust program in VSCode is possible but requires some setup since Rust doesn't have first-class debugging support in VSCode out of the browser. However, with the right tools and configuration, you can effectively debug Rust using the native debugger (like lldb
or gdb
) through extensions. Here's how to set it up and use it.
Install Required Tools
Before debugging, ensure you have the necessary components installed:
- Rust toolchain (
rustc
,cargo
) — Install via rustup . - VSCode — With the rust-analyzer extension for editing and analysis.
- Debugger backend — Either
lldb
orgdb
, depending on your platform.- On macOS : Install Xcode command-line tools (
xcode-select --install
) — includelldb
. - On Linux : Install
gdb
andgdb-gdbserver
via your package manager (eg,sudo apt install gdb
). - On Windows : Use
lldb
via LLVM orgdb
via MSYS2 or WSL.
- On macOS : Install Xcode command-line tools (
- CodeLLDB extension (recommended) — Install CodeLLDB from the VSCode marketplace. This is the most reliable way to debug Rust in VSCode.
Configure Launch Settings
After installing CodeLLDB, create a debug configuration:
- Open your Rust project in VSCode.
- Go to the Run and Debug view (Ctrl Shift D or Cmd Shift D).
- Click "create a launch.json file" if you don't have one.
- Choose "LLDB" as the environment.
- Replace the default configuration with:
{ "version": "0.2.0", "configurations": [ { "type": "lldb", "request": "launch", "name": "Debug", "cargo": { "args": [ "build", "--bin=your-binary-name" ] }, "args": [], "cwd": "${workspaceFolder}" } ] }
Replace your-binary-name
with the actual binary name from your Cargo.toml
. If you're using the default main.rs
, it's usually the crate name.
Alternatively, if you want more control:
{ "type": "lldb", "request": "launch", "name": "Debug", "program": "${workspaceFolder}/target/debug/your-binary-name", "args": [], "cwd": "${workspaceFolder}" }
Make sure the binary exists — run cargo build
first.
Set Breakpoints and Start Debugging
- Open a
.rs
file in your project. - Click to the left of the line numbers to set breakpoints (a red dot will appear).
- Go to the Run panel and select the "Debug" configuration.
- Click Run (F5).
The program will stop at your breakpoints. You can then:
- Inspect variable values ??in the sidebar.
- Step over/into/through code using the debug toolbar.
- Use the Debug Console to evaluate expressions.
Note: Rust-specific types (like String
, Vec
, Option
) are usually displayed in a readable format thanks to lldb
's Rust support.
Common Issues and Tips
- Breakpoints not hit? Make sure you're building in debug mode (default with
cargo build
). Release builds may optimize out debug info. - Variables not showing? Ensure your binary was compiled with debug symbols (they are by default in dev profile).
- Use
cargo build
manually first to catch compile errors before launching the debugger. - For workspace projects, specify the correct binary with
--bin
,--example
, or--lib
in thecargo.args
. - On Windows, consider using WSL for smoother debugging with
gdb
/lldb
.
Basically, it's not as seamless as debugging in languages ??like JavaScript or Python, but with CodeLLDB and proper setup, you can debug Rust effectively in VSCode.
The above is the detailed content of How to debug a Rust program in VSCode. For more information, please follow other related articles on the PHP Chinese website!

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