jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/concurrentMarkSweep/cmsLockVerifier.hpp@4947ee68d19c

7008136: CMS: assert((HeapWord*)nextChunk <= _limit) failed: sweep invariant
Summary: The recorded _sweep_limit may not necessarily remain a block boundary as the old generation expands during a concurrent cycle. Terminal actions inside the sweep closure need to be aware of this as they cross over the limit.
Reviewed-by: johnc, minqi

     1 /*

     2  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

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    23  */

    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CMSLOCKVERIFIER_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CMSLOCKVERIFIER_HPP

    28 #include "runtime/mutex.hpp"

    30 ///////////// Locking verification specific to CMS //////////////

    31 // Much like "assert_lock_strong()", except

    32 // that it relaxes the assertion somewhat for the parallel GC case, where

    33 // main GC thread or the CMS thread might hold the lock on behalf of

    34 // the parallel threads.

    35 class CMSLockVerifier: AllStatic {

    36  public:

    37   static void assert_locked(const Mutex* lock, const Mutex* p_lock1, const Mutex* p_lock2)

    38     PRODUCT_RETURN;

    39   static void assert_locked(const Mutex* lock, const Mutex* p_lock) {

    40     assert_locked(lock, p_lock, NULL);

    41   }

    42   static void assert_locked(const Mutex* lock) {

    43     assert_locked(lock, NULL);

    44   }

    45 };

    47 #endif // SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CMSLOCKVERIFIER_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/gc_implementation/concurrentMarkSweep/cmsLockVerifier.hpp@4947ee68d19c

src/share/vm/gc_implementation/concurrentMarkSweep/cmsLockVerifier.hpp