jdk8-mips64-public/hotspot: src/share/vm/memory/gcLocker.inline.hpp@8ce625481709

7032407: Crash in LinkResolver::runtime_resolve_virtual_method()
Summary: Make CDS reorder vtables so that dump time vtables match run time order, so when redefine classes reinitializes them, they aren't in the wrong order.
Reviewed-by: dcubed, acorn

     1 /*

     2  * Copyright (c) 2000, 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

    21  * questions.

    22  *

    23  */

    25 #ifndef SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP

    26 #define SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP

    28 #include "memory/gcLocker.hpp"

    30 inline bool GC_locker::is_active() {

    31   return _lock_count > 0 || _jni_lock_count > 0;

    32 }

    34 inline bool GC_locker::check_active_before_gc() {

    35   if (is_active()) {

    36     set_needs_gc();

    37   }

    38   return is_active();

    39 }

    41 inline void GC_locker::lock() {

    42   // cast away volatile

    43   Atomic::inc(&_lock_count);

    44   CHECK_UNHANDLED_OOPS_ONLY(

    45     if (CheckUnhandledOops) { Thread::current()->_gc_locked_out_count++; })

    46   assert(Universe::heap() == NULL ||

    47          !Universe::heap()->is_gc_active(), "locking failed");

    48 }

    50 inline void GC_locker::unlock() {

    51   // cast away volatile

    52   Atomic::dec(&_lock_count);

    53   CHECK_UNHANDLED_OOPS_ONLY(

    54     if (CheckUnhandledOops) { Thread::current()->_gc_locked_out_count--; })

    55 }

    57 inline void GC_locker::lock_critical(JavaThread* thread) {

    58   if (!thread->in_critical()) {

    59     if (!needs_gc()) {

    60       jni_lock();

    61     } else {

    62       jni_lock_slow();

    63     }

    64   }

    65   thread->enter_critical();

    66 }

    68 inline void GC_locker::unlock_critical(JavaThread* thread) {

    69   thread->exit_critical();

    70   if (!thread->in_critical()) {

    71     if (!needs_gc()) {

    72       jni_unlock();

    73     } else {

    74       jni_unlock_slow();

    75     }

    76   }

    77 }

    79 #endif // SHARE_VM_MEMORY_GCLOCKER_INLINE_HPP

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

src/share/vm/memory/gcLocker.inline.hpp@8ce625481709

src/share/vm/memory/gcLocker.inline.hpp