[Qemu-devel] Regression: segfault on ARM host

[Aurelien Jarno]

While trying to implement setcond on TCG ARM, I have discovered it does
not work anymore. I have bisected this regression to:

commit 6113d6d3169393c323ac4c82d756a850145a5e7a
Author: Paolo Bonzini <address@hidden>
Date:   Fri Jan 15 09:42:09 2010 +0100

    change while to if

    The while loop will be executed exactly 0 or 1 times, depending on
    env->exit_request.

    Signed-off-by: Paolo Bonzini <address@hidden>
    Signed-off-by: Anthony Liguori <address@hidden>

The assertion is actually triggered. When the next patch removing the
assertion is also applied it segfaults instead.

The patch does not seem to be wrong. Moreover I have tried to debug the
problem, but I failed to as it looks like an Heisenbug. Compiling this
file with -O0 also fixes the problem.

Does someone have an idea?

-- 
Aurelien Jarno                          GPG: 1024D/F1BCDB73
address@hidden                 http://www.aurel32.net