Bug#647992: same bug on chromium 14 backport on squeeze
Vincent Bernat
bernat at debian.org
Thu Nov 10 22:27:14 UTC 2011
OoO La nuit ayant déjà recouvert d'encre ce jour du jeudi 10 novembre
2011, vers 23:17, je disais:
> This thread contains some interesting stuff. There seems to be a lot of
> way to debug Chromium. --wait-for-debugger-children=render does not seem
> to work. --wait-for-debugger only waits a debugger for the browser, not
> for the renderer. Moreover, the documentation says it will wait 60
> seconds. This is not true on Linux. It waits for a USR1 signal.
> `chromium --renderer-startup-dialog --allow-sandbox-debugging` seems to
> give some interesting results. We don't have a dialog box and the given
> PID is not really a PID but it is possible to find the appropriate
> processes with `ps` and attach to them with gdb. Then, unpause by
> sending a USR1 signal and you can start to debug.
> Unfortunately, in my case, I get a lot of `Program received signal
> SIGTRAP, Trace/breakpoint trap.`. If I try to ignore them with `handle
> SIGTRAP nostop noprint`, it seems to loop forever. I am never able to
> get back into the renderer code.
> Maybe someone more experienced with debugging C++ code could take the
> lead from here?
I have tried a second time and got more luck. Now I am able to step into
RendererMain() until the following code:
#if defined(OS_POSIX) && !defined(OS_MACOSX)
RenderProcessImpl render_process;
render_process.set_main_thread(new RenderThread());
#endif
Here, I am greeted with:
waiting for new child: No child processes.
Dunno what to do.
--
Vincent Bernat ☯ http://vincent.bernat.im
Replace repetitive expressions by calls to a common function.
- The Elements of Programming Style (Kernighan & Plauger)
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