GPU process terminates rather than crashing on hang.

GPU process terminates rather than crashing on hang.

Hangs are reported via exit code.

BUG=74564, 90406, 74588
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=97359

[vangelis, 2011-08-16 20:22:56]

Could we add a histogram entry to keep track of how often the watchdog
terminates the process (vs, say, process launches)?

[apatrick_chromium, 2011-08-16 21:31:18]

I could do it this way. The trouble with having detected a hang is it's too late
to send an IPC to the browser process!

[vangelis, 2011-08-17 00:09:52]

On 2011/08/16 21:31:18, apatrick_chromium wrote:
> I could do it this way. The trouble with having detected a hang is it's too
late
> to send an IPC to the browser process!

Ah, good point... Does this patch simply try to eliminate the crash reports that
get logged when the gpu process gets wedged?

[apatrick_chromium, 2011-08-17 00:16:09]

On 2011/08/17 00:09:52, vangelis wrote:
> On 2011/08/16 21:31:18, apatrick_chromium wrote:
> > I could do it this way. The trouble with having detected a hang is it's too
> late
> > to send an IPC to the browser process!
> 
> Ah, good point... Does this patch simply try to eliminate the crash reports
that
> get logged when the gpu process gets wedged?

Yes it's a P1.

[apatrick_chromium, 2011-08-18 18:07:14]

I found that Chrome has some standard process exit codes and there is one for
hangs.

[vangelis, 2011-08-18 18:11:30]

On 2011/08/18 18:07:14, apatrick_chromium wrote:
> I found that Chrome has some standard process exit codes and there is one for
> hangs.

Oh, that's good.  With some luck we will catch the hangs in histograms recorded
at
GpuProcessHost::OnChildDied()