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Re: [PATCH] qtest: add a reproducer for LP#1878642

From: Peter Maydell
Subject: Re: [PATCH] qtest: add a reproducer for LP#1878642
Date: Tue, 16 Feb 2021 17:48:49 +0000

On Tue, 16 Feb 2021 at 17:31, Philippe Mathieu-Daudé <philmd@redhat.com> wrote:
> On 2/16/21 4:00 PM, Alexander Bulekov wrote:
> > On 210216 1325, Peter Maydell wrote:
> >> Hi; I just noticed this, but why does this test case pass
> >> "-trace pci*" to QEMU? It doesn't look like it does anything to
> >> try to capture the trace output, which thus winds up just going
> >> to the stdout/stderr of the "make check" run. Similarly I'm not
> >> sure '-d guest_errors' is going to do anything helpful unless
> >> you take steps to capture the output and check it.
> I suppose Alex took it from commit 4177b062fc5 ("hw/isa/lpc_ich9:
> Ignore reserved/invalid SCI IRQ") where it is used to show the
> problem the fuzzer reproducer triggers. Not useful in regular testing.
> > Ah, I sometimes include those in the initial report, if the device has
> > trace-events. I can remove this from fuzz-test.c, if it is slowing
> > things down.
> I doubt it is slowing things down, but it probably make it harder to
> find other problems (I suppose Peter got confused when looking for
> another failure and found these traces).

Not even that; it just looks a bit weird in the 'make check'
output. If there's no particular reason for them to be in there
we might as well remove them.

-- PMM

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