Trying to debug run_web_tests.py

[Chris Blume]

Hello everyone,

I'm trying to debug some libjpeg-turbo changes I'm making. run_web_tests.py shows a slightly different result for some images.

Anything I print to stdout seems to be consumed by run_web_tests.py. If I try to open a file it crashes (presumably sandboxing). I'm not sure how to attach gdb through this script.

Could someone point me in the right direction?
Thanks!

Chris Blume | Software Engineer | cbl...@google.com | +1-614-929-9221

[Dirk Pranke]

This list is mostly dead these days, so you're better off asking on blink-dev.

However, mostly dead != completely dead, so ...

If you run run_web_tests.py with --debug-rwt-logging, it will dump stdout and stderr as it gets it. This gets very verbose if you're running multiple tests, but for a single test or a few tests, it's not too bad.

Apart from that, if you want to instrument things and just see the logs, log to stderr, not stdout. Trying to use run_web_tests + a debugger is a recipe for madness, but if you run wiht --debug-rwt-logging, you should see enough to tell you how to invoke content_shell directly on a test, and then and run *that* under gdb.

Hope this helps,

-- Dirk

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[Chris Blume]

Perfect!
Thank you

Chris Blume | Software Engineer | cbl...@google.com | +1-614-929-9221

[gpcf...@gmail.com]