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

annotate src/share/vm/memory/metachunk.cpp @ 12902:bdfbb1fb19ca

8026391: The Metachunk header wastes memory Reviewed-by: coleenp, jmasa

author	stefank
date	Tue, 15 Oct 2013 14:28:51 +0200
parents	c23dbf0e8ab7
children	ec2e26e26183

rev	line source
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	1 /*
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	2 * Copyright (c) 2012, 2013, 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
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	31 class VirtualSpaceNode;
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	32
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	33 const size_t metadata_chunk_initialize = 0xf7f7f7f7;
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	34
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	35 size_t Metachunk::object_alignment() {
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	36 return ARENA_AMALLOC_ALIGNMENT;
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	37 }
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	38
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	39 size_t Metachunk::overhead() {
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	40 return align_size_up(sizeof(Metachunk), object_alignment()) / BytesPerWord;
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	41 }
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	42
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	43 // Metachunk methods
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	44
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	45 Metachunk::Metachunk(size_t word_size,
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	46 VirtualSpaceNode* container)
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	47 : Metabase<Metachunk>(word_size),
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	48 _top(NULL),
c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	49 _container(container)
c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	50 {
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	51 _top = initial_top();
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	52 #ifdef ASSERT
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	53 set_is_tagged_free(false);
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	54 size_t data_word_size = pointer_delta(end(),
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	55 _top,
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	56 sizeof(MetaWord));
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	57 Copy::fill_to_words((HeapWord*)_top,
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	58 data_word_size,
c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	59 metadata_chunk_initialize);
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	60 #endif
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	61 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	62
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	63 MetaWord* Metachunk::allocate(size_t word_size) {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	64 MetaWord* result = NULL;
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	65 // If available, bump the pointer to allocate.
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	66 if (free_word_size() >= word_size) {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	67 result = _top;
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	68 _top = _top + word_size;
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	69 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	70 return result;
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
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	73 // _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	74 size_t Metachunk::used_word_size() const {
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	75 return pointer_delta(_top, bottom(), sizeof(MetaWord));
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	76 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	77
7446 e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7208 diff changeset	78 size_t Metachunk::free_word_size() const {
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	79 return pointer_delta(end(), _top, sizeof(MetaWord));
7208 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 void Metachunk::print_on(outputStream* st) const {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	83 st->print_cr("Metachunk:"
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	84 " bottom " PTR_FORMAT " top " PTR_FORMAT
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	85 " end " PTR_FORMAT " size " SIZE_FORMAT,
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	86 bottom(), _top, end(), word_size());
7446 e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7208 diff changeset	87 if (Verbose) {
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7208 diff changeset	88 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	89 used_word_size(), free_word_size());
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7208 diff changeset	90 }
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	91 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	92
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	93 #ifndef PRODUCT
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	94 void Metachunk::mangle() {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	95 // 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	96 // maintain list of chunks.
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	97 HeapWord* start = (HeapWord*)(bottom() + overhead());
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	98 size_t size = word_size() - overhead();
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	99 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	100 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	101 #endif // PRODUCT
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	102
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	103 void Metachunk::verify() {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	104 #ifdef ASSERT
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	105 // 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	106 // headers with sizes.
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	107 assert(bottom() <= _top &&
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	108 _top <= (MetaWord*)end(),
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	109 "Chunk has been smashed");
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	110 #endif
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	111 return;
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	112 }
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	113
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	114 /////////////// Unit tests ///////////////
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	115
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	116 #ifndef PRODUCT
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	117
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	118 class TestMetachunk {
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	119 public:
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	120 static void test() {
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	121 size_t size = 2 * 1024 * 1024;
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	122 void* memory = malloc(size);
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	123 assert(memory != NULL, "Failed to malloc 2MB");
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 Metachunk* metachunk = ::new (memory) Metachunk(size / BytesPerWord, NULL);
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 assert(metachunk->bottom() == (MetaWord*)metachunk, "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	128 assert(metachunk->end() == (uintptr_t*)metachunk + metachunk->size(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	129
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	130 // Check sizes
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	131 assert(metachunk->size() == metachunk->word_size(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	132 assert(metachunk->word_size() == pointer_delta(metachunk->end(), metachunk->bottom(),
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	133 sizeof(MetaWord*)), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	134
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	135 // Check usage
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	136 assert(metachunk->used_word_size() == metachunk->overhead(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	137 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	138 assert(metachunk->top() == metachunk->initial_top(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	139 assert(metachunk->is_empty(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	140
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	141 // Allocate
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	142 size_t alloc_size = 64; // Words
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	143 assert(is_size_aligned(alloc_size, Metachunk::object_alignment()), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	144
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	145 MetaWord* mem = metachunk->allocate(alloc_size);
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	146
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	147 // Check post alloc
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	148 assert(mem == metachunk->initial_top(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	149 assert(mem + alloc_size == metachunk->top(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	150 assert(metachunk->used_word_size() == metachunk->overhead() + alloc_size, "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	151 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	152 assert(!metachunk->is_empty(), "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 // Clear chunk
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	155 metachunk->reset_empty();
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	156
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	157 // Check post clear
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	158 assert(metachunk->used_word_size() == metachunk->overhead(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	159 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	160 assert(metachunk->top() == metachunk->initial_top(), "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 free(memory);
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	164 }
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
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	167 void TestMetachunk_test() {
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	168 TestMetachunk::test();
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	169 }
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	170
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	171 #endif

Mercurial > hg > truffle

annotate src/share/vm/memory/metachunk.cpp @ 12902:bdfbb1fb19ca