jdk8-mips64-public/hotspot: src/share/vm/memory/space.inline.hpp@fc9d8850ab8b

7150058: Allocate symbols from null boot loader to an arena for NMT
Summary: Move symbol allocation to an arena so NMT doesn't have to track them at startup.
Reviewed-by: never, kamg, zgu

     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

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    23  */

    25 #ifndef SHARE_VM_MEMORY_SPACE_INLINE_HPP

    26 #define SHARE_VM_MEMORY_SPACE_INLINE_HPP

    28 #include "gc_interface/collectedHeap.hpp"

    29 #include "memory/space.hpp"

    30 #include "memory/universe.hpp"

    31 #include "runtime/safepoint.hpp"

    33 inline HeapWord* Space::block_start(const void* p) {

    34   return block_start_const(p);

    35 }

    37 inline HeapWord* OffsetTableContigSpace::allocate(size_t size) {

    38   HeapWord* res = ContiguousSpace::allocate(size);

    39   if (res != NULL) {

    40     _offsets.alloc_block(res, size);

    41   }

    42   return res;

    43 }

    45 // Because of the requirement of keeping "_offsets" up to date with the

    46 // allocations, we sequentialize these with a lock.  Therefore, best if

    47 // this is used for larger LAB allocations only.

    48 inline HeapWord* OffsetTableContigSpace::par_allocate(size_t size) {

    49   MutexLocker x(&_par_alloc_lock);

    50   // This ought to be just "allocate", because of the lock above, but that

    51   // ContiguousSpace::allocate asserts that either the allocating thread

    52   // holds the heap lock or it is the VM thread and we're at a safepoint.

    53   // The best I (dld) could figure was to put a field in ContiguousSpace

    54   // meaning "locking at safepoint taken care of", and set/reset that

    55   // here.  But this will do for now, especially in light of the comment

    56   // above.  Perhaps in the future some lock-free manner of keeping the

    57   // coordination.

    58   HeapWord* res = ContiguousSpace::par_allocate(size);

    59   if (res != NULL) {

    60     _offsets.alloc_block(res, size);

    61   }

    62   return res;

    63 }

    65 inline HeapWord*

    66 OffsetTableContigSpace::block_start_const(const void* p) const {

    67   return _offsets.block_start(p);

    68 }

    70 inline HeapWord* ContiguousSpace::concurrent_iteration_safe_limit()

    71 {

    72   assert(_concurrent_iteration_safe_limit <= top(),

    73          "_concurrent_iteration_safe_limit update missed");

    74   return _concurrent_iteration_safe_limit;

    75 }

    77 inline void ContiguousSpace::set_concurrent_iteration_safe_limit(HeapWord* new_limit)

    78 {

    79   assert(new_limit <= top(), "uninitialized objects in the safe range");

    80   _concurrent_iteration_safe_limit = new_limit;

    81 }

    83 #endif // SHARE_VM_MEMORY_SPACE_INLINE_HPP

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

src/share/vm/memory/space.inline.hpp@fc9d8850ab8b

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