[Webkit-unassigned] [Bug 262794] [WPE][GTK] Web process cache suspend/resume does not work, WebProcessProxy::processIdentifier is not the pid of the actual web process

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=262794

--- Comment #3 from Michael Catanzaro <mcatanzaro at redhat.com> ---
I'm not sure what to do here.

Auditing every single use of WebProcessProxy::processIdentifier is going to be disruptive. To confidently prevent bugs, we would indeed need to change it to ensure it cannot be converted to a pid. It would be *much* easier if we could instead just ensure we have the right pid of the WebKit child process (as seen within the UI process's pid namespace). I doubt we are ever going to want to perform operations on the bwrap process, because that's an implementation detail that the rest of WebKit does not know about.

Problem is org.freedesktop.portal.Flatpak is not going to work because the documentation says we cannot assume the returned pid is valid in the caller's pid namespace. So I guess we really do need to either (a) perform this audit and hope we do not actually need real pids except for things that can be handled by org.freedesktop.portal.Flatpak, or (b) change flatpak to provide us a usable pid.

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