truffle: src/share/vm/memory/metachunk.cpp annotate

annotate src/share/vm/memory/metachunk.cpp @ 17937:78bbf4d43a14

8037816: Fix for 8036122 breaks build with Xcode5/clang 8043029: Change 8037816 breaks HS build with older GCC versions which don't support diagnostic pragmas 8043164: Format warning in traceStream.hpp Summary: Backport of main fix + two corrections, enables clang compilation, turns on format attributes, corrects/mutes warnings Reviewed-by: kvn, coleenp, iveresov, twisti

author	drchase
date	Thu, 22 May 2014 15:52:41 -0400
parents	ec2e26e26183
children

rev	line source
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	1 /*
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 12903 diff changeset	2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	4 *
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	7 * published by the Free Software Foundation.
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	8 *
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	13 * accompanied this code).
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	14 *
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	18 *
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	20 * or visit www.oracle.com if you need additional information or have any
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	21 * questions.
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	22 *
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	23 */
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	24
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	25 #include "precompiled.hpp"
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	26 #include "memory/allocation.hpp"
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	27 #include "memory/metachunk.hpp"
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	28 #include "utilities/copy.hpp"
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	29 #include "utilities/debug.hpp"
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	30
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 12903 diff changeset	31 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 12903 diff changeset	32
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	33 class VirtualSpaceNode;
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	34
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	35 const size_t metadata_chunk_initialize = 0xf7f7f7f7;
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	36
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	37 size_t Metachunk::object_alignment() {
12903 ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	38 // Must align pointers and sizes to 8,
ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	39 // so that 64 bit types get correctly aligned.
ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	40 const size_t alignment = 8;
ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	41
ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	42 // Make sure that the Klass alignment also agree.
ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	43 STATIC_ASSERT(alignment == (size_t)KlassAlignmentInBytes);
ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	44
ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	45 return alignment;
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	46 }
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	47
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	48 size_t Metachunk::overhead() {
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	49 return align_size_up(sizeof(Metachunk), object_alignment()) / BytesPerWord;
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	50 }
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	51
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	52 // Metachunk methods
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	53
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	54 Metachunk::Metachunk(size_t word_size,
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	55 VirtualSpaceNode* container)
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	56 : Metabase<Metachunk>(word_size),
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	57 _top(NULL),
c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	58 _container(container)
c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	59 {
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	60 _top = initial_top();
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	61 #ifdef ASSERT
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	62 set_is_tagged_free(false);
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	63 size_t data_word_size = pointer_delta(end(),
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	64 _top,
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	65 sizeof(MetaWord));
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	66 Copy::fill_to_words((HeapWord*)_top,
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	67 data_word_size,
c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	68 metadata_chunk_initialize);
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	69 #endif
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	70 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	71
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	72 MetaWord* Metachunk::allocate(size_t word_size) {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	73 MetaWord* result = NULL;
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	74 // If available, bump the pointer to allocate.
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	75 if (free_word_size() >= word_size) {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	76 result = _top;
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	77 _top = _top + word_size;
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	78 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	79 return result;
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	80 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	81
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	82 // _bottom points to the start of the chunk including the overhead.
7446 e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7208 diff changeset	83 size_t Metachunk::used_word_size() const {
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	84 return pointer_delta(_top, bottom(), sizeof(MetaWord));
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	85 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	86
7446 e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7208 diff changeset	87 size_t Metachunk::free_word_size() const {
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	88 return pointer_delta(end(), _top, sizeof(MetaWord));
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	89 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	90
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	91 void Metachunk::print_on(outputStream* st) const {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	92 st->print_cr("Metachunk:"
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	93 " bottom " PTR_FORMAT " top " PTR_FORMAT
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	94 " end " PTR_FORMAT " size " SIZE_FORMAT,
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	95 bottom(), _top, end(), word_size());
7446 e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7208 diff changeset	96 if (Verbose) {
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7208 diff changeset	97 st->print_cr(" used " SIZE_FORMAT " free " SIZE_FORMAT,
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7208 diff changeset	98 used_word_size(), free_word_size());
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7208 diff changeset	99 }
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	100 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	101
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	102 #ifndef PRODUCT
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	103 void Metachunk::mangle() {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	104 // Mangle the payload of the chunk and not the links that
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	105 // maintain list of chunks.
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	106 HeapWord* start = (HeapWord*)(bottom() + overhead());
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	107 size_t size = word_size() - overhead();
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	108 Copy::fill_to_words(start, size, metadata_chunk_initialize);
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	109 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	110 #endif // PRODUCT
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	111
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	112 void Metachunk::verify() {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	113 #ifdef ASSERT
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	114 // Cannot walk through the blocks unless the blocks have
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	115 // headers with sizes.
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	116 assert(bottom() <= _top &&
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	117 _top <= (MetaWord*)end(),
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	118 "Chunk has been smashed");
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	119 #endif
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	120 return;
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	121 }
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	122
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	123 /////////////// Unit tests ///////////////
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	124
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	125 #ifndef PRODUCT
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	126
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	127 class TestMetachunk {
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	128 public:
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	129 static void test() {
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	130 size_t size = 2 * 1024 * 1024;
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	131 void* memory = malloc(size);
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	132 assert(memory != NULL, "Failed to malloc 2MB");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	133
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	134 Metachunk* metachunk = ::new (memory) Metachunk(size / BytesPerWord, NULL);
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	135
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	136 assert(metachunk->bottom() == (MetaWord*)metachunk, "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	137 assert(metachunk->end() == (uintptr_t*)metachunk + metachunk->size(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	138
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	139 // Check sizes
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	140 assert(metachunk->size() == metachunk->word_size(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	141 assert(metachunk->word_size() == pointer_delta(metachunk->end(), metachunk->bottom(),
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	142 sizeof(MetaWord*)), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	143
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	144 // Check usage
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	145 assert(metachunk->used_word_size() == metachunk->overhead(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	146 assert(metachunk->free_word_size() == metachunk->word_size() - metachunk->used_word_size(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	147 assert(metachunk->top() == metachunk->initial_top(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	148 assert(metachunk->is_empty(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	149
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	150 // Allocate
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	151 size_t alloc_size = 64; // Words
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	152 assert(is_size_aligned(alloc_size, Metachunk::object_alignment()), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	153
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	154 MetaWord* mem = metachunk->allocate(alloc_size);
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	155
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	156 // Check post alloc
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	157 assert(mem == metachunk->initial_top(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	158 assert(mem + alloc_size == metachunk->top(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	159 assert(metachunk->used_word_size() == metachunk->overhead() + alloc_size, "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	160 assert(metachunk->free_word_size() == metachunk->word_size() - metachunk->used_word_size(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	161 assert(!metachunk->is_empty(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	162
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	163 // Clear chunk
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	164 metachunk->reset_empty();
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	165
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	166 // Check post clear
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	167 assert(metachunk->used_word_size() == metachunk->overhead(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	168 assert(metachunk->free_word_size() == metachunk->word_size() - metachunk->used_word_size(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	169 assert(metachunk->top() == metachunk->initial_top(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	170 assert(metachunk->is_empty(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	171
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	172 free(memory);
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	173 }
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	174 };
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	175
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	176 void TestMetachunk_test() {
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	177 TestMetachunk::test();
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	178 }
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	179
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	180 #endif

Mercurial > hg > truffle

annotate src/share/vm/memory/metachunk.cpp @ 17937:78bbf4d43a14