Add wkdev-setup-debugging host script

[TingPing]

patrick@wkdev:~/checkout/WebKit$ rr record echo 'hello world'
rr needs /proc/sys/kernel/perf_event_paranoid <= 1, but it is 2.
Change it to 1, or use 'rr record -n' (slow).
Consider putting 'kernel.perf_event_paranoid = 1' in /etc/sysctl.d/10-rr.conf.
See 'man 8 sysctl', 'man 5 sysctl.d' (systemd systems)
and 'man 5 sysctl.conf' (non-systemd systems) for more details.

[nikolaszimmermann]

I'm not sure anymore if we really need this. rr is actually nice and explains what you need to do on your host system.
How about we just add a README.md section for tools like rr/perf/etc. and describe with a few sentences what needs to be done on the host -- there are so many host distros, that handle things differently, probably hard to script it.

[fred-wang]

FWIW, this is https://github.com/rr-debugger/rr/wiki/Building-And-Installing#os-configuration

I'm not sure anymore if we really need this. rr is actually nice and explains what you need to do on your host system. How about we just add a README.md section for tools like rr/perf/etc. and describe with a few sentences what needs to be done on the host -- there are so many host distros, that handle things differently, probably hard to script it.

Running WebKitGTK's MiniBrowser on the host system fails on Ubuntu 24.04; that is, without rr:

$ Tools/Scripts/run-minibrowser --gtk --debug
/home/mirko/work/code/WebKit/WebKitBuild/GTK/Debug/bin/MiniBrowser: error while loading shared libraries: libocdm.so: cannot open shared object file: No such file or directory

ScriptError raised: Failed to run "['/home/mirko/work/code/WebKit/WebKitBuild/GTK/Debug/bin/MiniBrowser']" exit_code: 127 cwd: /home/mirko/work/code/WebKit
Traceback (most recent call last):
  File "/home/mirko/work/code/WebKit/Tools/Scripts/webkitpy/minibrowser/run_webkit_app.py", line 65, in main
    return port.run_minibrowser(browser_args)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/mirko/work/code/WebKit/Tools/Scripts/webkitpy/port/gtk.py", line 188, in run_minibrowser
    return self._executive.run_command(command + args, cwd=self.webkit_base(), stdout=None, return_stderr=False, decode_output=False, env=env, pass_fds=pass_fds)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/mirko/work/code/WebKit/Tools/Scripts/webkitpy/common/system/executive.py", line 425, in run_command
    (error_handler or self.default_error_handler)(script_error)
  File "/home/mirko/work/code/WebKit/Tools/Scripts/webkitpy/common/system/abstractexecutive.py", line 98, in default_error_handler
    raise error
webkitpy.common.system.executive.ScriptError: Failed to run "['/home/mirko/work/code/WebKit/WebKitBuild/GTK/Debug/bin/MiniBrowser']" exit_code: 127 cwd: /home/mirko/work/code/WebKit

so it'd be convenient if rr in a webkit-container-sdk works without further configuration steps.

FWIW, this is https://github.com/rr-debugger/rr/wiki/Building-And-Installing#os-configuration

That fixes

$ rr record --bind-to-cpu=0 echo 'hello world'
rr: Saving execution to trace directory `/home/mirko/.local/share/rr/echo-8'.
hello world

--bind-to-cpu=0 was required because of rr-debugger/rr#3338 (comment).

Recording a WebKitGTK MiniBrowser run fails:

$ WEBKIT_MINI_BROWSER_PREFIX="rr record --bind-to-cpu=0" Tools/Scripts/run-minibrowser --gtk --debug
rr: Saving execution to trace directory `/home/mirko/.local/share/rr/MiniBrowser-10'.
bwrap: Can't create tmpfile for /.flatpak-info: File exists

** (MiniBrowser:20465): ERROR **: 15:55:51.179: Failed to fully launch dbus-proxy: Child process exited with code 1

ScriptError raised: Failed to run "['rr', 'record', '--bind-to-cpu=0', '/host/home/mirko/work/code/WebKit/WebKitBuild/GTK/Debug/bin/MiniBrowser']" exit_code: -5 cwd: /host/home/mirko/work/code/WebKit
Traceback (most recent call last):
  File "/host/home/mirko/work/code/WebKit/Tools/Scripts/webkitpy/minibrowser/run_webkit_app.py", line 65, in main
    return port.run_minibrowser(browser_args)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/host/home/mirko/work/code/WebKit/Tools/Scripts/webkitpy/port/gtk.py", line 188, in run_minibrowser
    return self._executive.run_command(command + args, cwd=self.webkit_base(), stdout=None, return_stderr=False, decode_output=False, env=env, pass_fds=pass_fds)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/host/home/mirko/work/code/WebKit/Tools/Scripts/webkitpy/common/system/executive.py", line 425, in run_command
    (error_handler or self.default_error_handler)(script_error)
  File "/host/home/mirko/work/code/WebKit/Tools/Scripts/webkitpy/common/system/abstractexecutive.py", line 98, in default_error_handler
    raise error
webkitpy.common.system.executive.ScriptError: Failed to run "['rr', 'record', '--bind-to-cpu=0', '/host/home/mirko/work/code/WebKit/WebKitBuild/GTK/Debug/bin/MiniBrowser']" exit_code: -5 cwd: /host/home/mirko/work/code/WebKit