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Debugging Tremor

This is a short canned synopsis of debugging tremor.

rust-lldb​

We use rust-lldb, to drive breakpoint debugging in tremor.

Alternately, rust integration with IntelliJ CLION also offers interactive breakpoint debugging in an IDE environment.

Setup on Mac OS X​

rust-lldb ships with rust so no added tooling is required.

Run and use the Debugger​

Preparing tremor for debugging:

$ rust-lldb target/debug/tremor
(lldb) command script import "/.../.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/etc/lldb_rust_formatters.py"
(lldb) type summary add --no-value --python-function lldb_rust_formatters.print_val -x ".*" --category Rust
(lldb) type category enable Rust
(lldb) target create "target/debug/tremor"
Current executable set to 'target/debug/tremor' (x86_64).
(lldb) run
...

You can:

  • Run tremor under the debugger:

    (lldb) run

  • Run to breakpoint for malloc related issues:

    (lldb) br set -n malloc_error_break
    (lldb) run

  • Take a backtrace ( stacktrace ) upon hitting a breakpoint:

    (lldb) bt

  • List breakpoints:

    (lldb) br l

  • Quit lldb

    (lldb) quit

For a more detailed synopsis check out lldb project documentation or the lldb cheatsheet.