Mercurial > hg > truffle
diff src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp @ 3746:537a4053b0f9
7042740: CMS: assert(n> q) failed: Looping at: ... blockOffsetTable.cpp:557
Summary: Do a one-step look-ahead, when sweeping free or garbage blocks, to avoid overstepping sweep limit, which may become a non-block-boundary because of a heap expansion delta coalescing with a previously co-terminal free block.
Reviewed-by: brutisso, tonyp
| author | ysr |
|---|---|
| date | Mon, 23 May 2011 16:42:14 -0700 |
| parents | f95d63e2154a |
| children | c08412904149 |
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--- a/src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp Fri May 20 22:27:48 2011 -0700 +++ b/src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp Mon May 23 16:42:14 2011 -0700 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -407,6 +407,11 @@ void save_sweep_limit() { _sweep_limit = BlockOffsetArrayUseUnallocatedBlock ? unallocated_block() : end(); + if (CMSTraceSweeper) { + gclog_or_tty->print_cr(">>>>> Saving sweep limit " PTR_FORMAT + " for space [" PTR_FORMAT "," PTR_FORMAT ") <<<<<<", + _sweep_limit, bottom(), end()); + } } NOT_PRODUCT( void clear_sweep_limit() { _sweep_limit = NULL; }