Debugging Node

[RaisinTen]

How do I generate a stack trace like this for Node.js?

[addaleax]

@RaisinTen That stack trace comes from gdb, a popular debugger for C/C++ code. lldb would also be able to generate similar stack traces.

[RaisinTen]

@addaleax thanks for the response. I did use gdb for debugging some C/C++ codes but I'm not quite sure how I'm supposed to use it for node.

[Srinivasa314]

Run gdb --args node file.js

[addaleax]

@RaisinTen In a case like the one you linked, you could either:

• Run gdb --args node test.js, then run to start the program and use bt for the backtrace once it crashes
• Run node test.js (in a way that would generate a coredump, i.e. with ulimit -c unlimited), then use gdb node core to load the core file and then run bt once that is loaded.

You can also always run gdb --args node ..., use run, and then press Ctrl+C to interrupt the process and then generate a backtrace.

[RaisinTen]

Thank you so much! 🙂