Bug 188654 – [WPE][GTK] No debug symbols when running 'webkit-flatpak --gtk --gdb'

• Status: RESOLVED
• Resolution: FIXED
• Component: WebKitGTK

[Michael Catanzaro]

I noticed that the web process crashes immediately when visiting youtube.com. I want to report a bug. Since I built webkit using update-webkitgtk-flatpak and then build-webkit, I can't use the normal system coredumpctl to get a backtrace: I have to go through webkit-flatpak. I try this:

$ webkit-flatpak --gtk -m 19974 --gdb

where 19974 is the pid of the crashing web process.

It (unexpectedly?) fetches a bunch of git repos, then opens up gdb:

Core was generated by `/home/mcatanzaro/Projects/WebKit/WebKitBuild/Debug/bin/WebKitWebProcess 5 37'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f4b2cf00629 in ?? ()
[Current thread is 1 (LWP 19974)]
(gdb) bt
#0  0x00007f4b2cf00629 in ?? ()
#1  0x00007ffc1d9d2290 in ?? ()
#2  0x00007f4b3a094b5e in ?? ()
#3  0x00007f4aa81a0788 in ?? ()
#4  0x00007f4aa81a0788 in ?? ()
#5  0x00007ffc1d9d22f0 in ?? ()
#6  0x00007f4b3a08266c in ?? ()
#7  0x0000000000000000 in ?? ()

It's really great that we have the --gdb and -m functionality built-in, but there's no debuginfo so I don't understand how to use it.

[Michael Catanzaro]

Just found this in org.webkit.WebKit.yaml:

build-options:
  cflags: -O2 -g
  cxxflags: -O2 -g
  strip: false
  no-debuginfo: true

I don't know why we're using no-debuginfo: true, but that seems pretty unfriendly for a runtime that's exclusively intended as a developer tool. Thibault, can we change that, or is there an important reason for it?

[Michael Catanzaro]

I guess that controls what we build ourselves though, not the runtime. We need org.gnome.Sdk.Debug to be installed.

[Michael Catanzaro]

I'm running 'update-webkitgtk-flatpak' right now and it is installing debuginfo. Perhaps I hadn't set debug configuration last time I ran it? Not sure. We'll see what happens....

[Thibault Saunier]

(In reply to Michael Catanzaro from comment #3)
> I'm running 'update-webkitgtk-flatpak' right now and it is installing
> debuginfo. Perhaps I hadn't set debug configuration last time I ran it? Not
> sure. We'll see what happens....

Right, Sdk.Debug is installed only when `--debug` is passed.

[Philippe Normand]

Seems like all is solved now? I'll assume so and close. Please reopen if needed!