Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/concurrentMarkSweep/freeChunk.cpp @ 6842:b9a9ed0f8eeb
7197424: update copyright year to match last edit in jdk8 hotspot repository
Summary: Update copyright year to 2012 for relevant files
Reviewed-by: dholmes, coleenp
| author | mikael |
|---|---|
| date | Tue, 09 Oct 2012 10:09:34 -0700 |
| parents | 9f059abe8cf2 |
| children | 78bbf4d43a14 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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7197424: update copyright year to match last edit in jdk8 hotspot repository
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2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 6026 | 26 #include "gc_implementation/concurrentMarkSweep/freeChunk.hpp" |
| 27 #include "memory/freeBlockDictionary.hpp" | |
| 1972 | 28 #include "utilities/copy.hpp" |
| 0 | 29 |
| 30 #ifndef PRODUCT | |
| 31 | |
| 32 #define baadbabeHeapWord badHeapWordVal | |
| 33 #define deadbeefHeapWord 0xdeadbeef | |
| 34 | |
| 35 size_t const FreeChunk::header_size() { | |
| 36 return sizeof(FreeChunk)/HeapWordSize; | |
| 37 } | |
| 38 | |
| 39 void FreeChunk::mangleAllocated(size_t size) { | |
| 40 // mangle all but the header of a just-allocated block | |
| 41 // of storage | |
| 42 assert(size >= MinChunkSize, "smallest size of object"); | |
| 43 // we can't assert that _size == size because this may be an | |
| 44 // allocation out of a linear allocation block | |
| 45 assert(sizeof(FreeChunk) % HeapWordSize == 0, | |
| 46 "shouldn't write beyond chunk"); | |
| 47 HeapWord* addr = (HeapWord*)this; | |
| 48 size_t hdr = header_size(); | |
| 49 Copy::fill_to_words(addr + hdr, size - hdr, baadbabeHeapWord); | |
| 50 } | |
| 51 | |
| 187 | 52 void FreeChunk::mangleFreed(size_t sz) { |
| 0 | 53 assert(baadbabeHeapWord != deadbeefHeapWord, "Need distinct patterns"); |
| 54 // mangle all but the header of a just-freed block of storage | |
| 55 // just prior to passing it to the storage dictionary | |
| 187 | 56 assert(sz >= MinChunkSize, "smallest size of object"); |
| 57 assert(sz == size(), "just checking"); | |
| 0 | 58 HeapWord* addr = (HeapWord*)this; |
| 59 size_t hdr = header_size(); | |
| 187 | 60 Copy::fill_to_words(addr + hdr, sz - hdr, deadbeefHeapWord); |
| 0 | 61 } |
| 62 | |
| 63 void FreeChunk::verifyList() const { | |
| 64 FreeChunk* nextFC = next(); | |
| 65 if (nextFC != NULL) { | |
| 66 assert(this == nextFC->prev(), "broken chain"); | |
| 67 assert(size() == nextFC->size(), "wrong size"); | |
| 68 nextFC->verifyList(); | |
| 69 } | |
| 70 } | |
| 71 #endif | |
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72 |
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73 void FreeChunk::print_on(outputStream* st) { |
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74 st->print_cr("Next: " PTR_FORMAT " Prev: " PTR_FORMAT " %s", |
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75 next(), prev(), cantCoalesce() ? "[can't coalesce]" : ""); |
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76 } |