Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/concurrentMarkSweep/freeChunk.cpp @ 1278:da9559b49b84
6915557: assert(_gvn.type(l)->higher_equal(type),"must constrain OSR typestate") with debug build
Reviewed-by: kvn
author | never |
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date | Thu, 25 Feb 2010 11:38:50 -0800 |
parents | e018e6884bd8 |
children | c18cbe5936b8 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 2001-2008 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_freeChunk.cpp.incl" | |
27 | |
28 #ifndef PRODUCT | |
29 | |
30 #define baadbabeHeapWord badHeapWordVal | |
31 #define deadbeefHeapWord 0xdeadbeef | |
32 | |
33 size_t const FreeChunk::header_size() { | |
34 return sizeof(FreeChunk)/HeapWordSize; | |
35 } | |
36 | |
37 void FreeChunk::mangleAllocated(size_t size) { | |
38 // mangle all but the header of a just-allocated block | |
39 // of storage | |
40 assert(size >= MinChunkSize, "smallest size of object"); | |
41 // we can't assert that _size == size because this may be an | |
42 // allocation out of a linear allocation block | |
43 assert(sizeof(FreeChunk) % HeapWordSize == 0, | |
44 "shouldn't write beyond chunk"); | |
45 HeapWord* addr = (HeapWord*)this; | |
46 size_t hdr = header_size(); | |
47 Copy::fill_to_words(addr + hdr, size - hdr, baadbabeHeapWord); | |
48 } | |
49 | |
187 | 50 void FreeChunk::mangleFreed(size_t sz) { |
0 | 51 assert(baadbabeHeapWord != deadbeefHeapWord, "Need distinct patterns"); |
52 // mangle all but the header of a just-freed block of storage | |
53 // just prior to passing it to the storage dictionary | |
187 | 54 assert(sz >= MinChunkSize, "smallest size of object"); |
55 assert(sz == size(), "just checking"); | |
0 | 56 HeapWord* addr = (HeapWord*)this; |
57 size_t hdr = header_size(); | |
187 | 58 Copy::fill_to_words(addr + hdr, sz - hdr, deadbeefHeapWord); |
0 | 59 } |
60 | |
61 void FreeChunk::verifyList() const { | |
62 FreeChunk* nextFC = next(); | |
63 if (nextFC != NULL) { | |
64 assert(this == nextFC->prev(), "broken chain"); | |
65 assert(size() == nextFC->size(), "wrong size"); | |
66 nextFC->verifyList(); | |
67 } | |
68 } | |
69 #endif | |
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70 |
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71 void FreeChunk::print_on(outputStream* st) { |
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72 st->print_cr("Next: " PTR_FORMAT " Prev: " PTR_FORMAT " %s", |
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73 next(), prev(), cantCoalesce() ? "[can't coalesce]" : ""); |
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74 } |