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HotSpotResolvedObjectType: implement hasFinalizeSubclass() correctly don't use the (wrong) cached value, but ask the runtime on each request. Fixes regression on xml.* benchmarks @ specjvm2008. The problem was: After the constructor of Object was deoptimized due to an assumption violation, it was recompiled again after some time. However, on recompilation, the value of hasFinalizeSubclass for the class was not updated and it was compiled again with a, now wrong, assumption, which then triggers deoptimization again. This was repeated until it hit the recompilation limit (defined by PerMethodRecompilationCutoff), and therefore only executed by the interpreter from now on, causing the performance regression.
author Bernhard Urban <bernhard.urban@jku.at>
date Mon, 15 Apr 2013 19:54:58 +0200
parents e4019a78c938
children
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Gilles Duboscq (gdub)
Peter Hofer
Christian Haeubl (chaeubl)
Christian Humer (chumer)
Roland Schatz
Doug Simon (dnsimon)
Lukas Stadler (lstadler)
Alexander Stipsits
Katrin Strassl
Christian Wimmer (cwimmer)
Andreas Woess (aw)
Thomas Wuerthinger (thomaswue)