[Webkit-unassigned] [Bug 75528] Optimize the multiply-add in Biquad.cpp::process

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=75528





--- Comment #36 from Raymond Toy <rtoy at chromium.org>  2012-03-15 09:26:08 PST ---
(In reply to comment #33)
> (In reply to comment #31)
> > This patch seems to crash in debug:
> > 
> > [49220:49236:17280644243061:ERROR:process_util_posix.cc(142)] Received signal 11
> >     base::debug::StackTrace::StackTrace() [0x851b56]
> >     base::(anonymous namespace)::StackDumpSignalHandler() [0x80b739]
> >     0x7f352f9d1af0
> >     WebCore::Biquad::process() [0x256d73e]
> >     WebCore::HRTFKernel::HRTFKernel() [0x25ac2e4]
> >     WebCore::HRTFKernel::create() [0x25ab549]
> >     WebCore::HRTFElevation::calculateKernelsForAzimuthElevation() [0x25aa703]
> >     WebCore::HRTFElevation::createForSubject() [0x25aa9db]
> >     WebCore::HRTFDatabase::HRTFDatabase() [0x25a987e]
> >     WebCore::HRTFDatabase::create() [0x25a9630]
> >     WebCore::HRTFDatabaseLoader::load() [0x257382d]
> >     WebCore::databaseLoaderEntry() [0x25737ac]
> >     WTF::threadEntryPoint() [0x1f509e5]
> >     WTF::wtfThreadEntryPoint() [0x793cb8]
> >     start_thread [0x7f3531e369ca]
> >     0x7f352fa8470d
> > None
> 
> Hi,
> That`s strange that I cannot reproduce the issue (by several different machines). Could you provide more details about your platform?

The stack trace looks totally bogus. (I'm pretty sure the HRTFKernel doesn't call Biquad).

But I can reproduce the crash on my system.  The stack trace is totally trash too.  More work needed....

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