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

annotate src/share/vm/memory/metachunk.cpp @ 14697:bac9ef65b71d

8035057: NewSize ergonomics wrong when setting small or unaligned size on command line Summary: Making sure that if NewSize is set on the command line it should be used for both min and initial size even if it is re-aligned. Reviewed-by: jwilhelm, jmasa

author	sjohanss
date	Fri, 21 Feb 2014 09:48:52 +0100
parents	ec2e26e26183
children	78bbf4d43a14

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() {
12903 ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	36 // Must align pointers and sizes to 8,
ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	37 // so that 64 bit types get correctly aligned.
ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	38 const size_t alignment = 8;
ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	39
ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	40 // Make sure that the Klass alignment also agree.
ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	41 STATIC_ASSERT(alignment == (size_t)KlassAlignmentInBytes);
ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	42
ec2e26e26183 8026392: Metachunks and Metablocks are using a too large alignment stefank parents: 12902 diff changeset	43 return alignment;
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	44 }
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	45
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	46 size_t Metachunk::overhead() {
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	47 return align_size_up(sizeof(Metachunk), object_alignment()) / BytesPerWord;
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	48 }
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	49
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	50 // Metachunk methods
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	51
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	52 Metachunk::Metachunk(size_t word_size,
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	53 VirtualSpaceNode* container)
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	54 : Metabase<Metachunk>(word_size),
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	55 _top(NULL),
c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	56 _container(container)
c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	57 {
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	58 _top = initial_top();
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	59 #ifdef ASSERT
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	60 set_is_tagged_free(false);
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	61 size_t data_word_size = pointer_delta(end(),
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	62 _top,
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	63 sizeof(MetaWord));
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	64 Copy::fill_to_words((HeapWord*)_top,
10175 c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	65 data_word_size,
c23dbf0e8ab7 8011268: NPG: Free unused VirtualSpaceNodes jmasa parents: 7446 diff changeset	66 metadata_chunk_initialize);
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	67 #endif
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	68 }
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 MetaWord* Metachunk::allocate(size_t word_size) {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	71 MetaWord* result = NULL;
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	72 // If available, bump the pointer to allocate.
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	73 if (free_word_size() >= word_size) {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	74 result = _top;
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	75 _top = _top + word_size;
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 return result;
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
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	80 // _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	81 size_t Metachunk::used_word_size() const {
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	82 return pointer_delta(_top, bottom(), sizeof(MetaWord));
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	83 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	84
7446 e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7208 diff changeset	85 size_t Metachunk::free_word_size() const {
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	86 return pointer_delta(end(), _top, sizeof(MetaWord));
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	87 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	88
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	89 void Metachunk::print_on(outputStream* st) const {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	90 st->print_cr("Metachunk:"
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	91 " bottom " PTR_FORMAT " top " PTR_FORMAT
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	92 " end " PTR_FORMAT " size " SIZE_FORMAT,
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	93 bottom(), _top, end(), word_size());
7446 e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7208 diff changeset	94 if (Verbose) {
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7208 diff changeset	95 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	96 used_word_size(), free_word_size());
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7208 diff changeset	97 }
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	98 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	99
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	100 #ifndef PRODUCT
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	101 void Metachunk::mangle() {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	102 // 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	103 // maintain list of chunks.
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	104 HeapWord* start = (HeapWord*)(bottom() + overhead());
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	105 size_t size = word_size() - overhead();
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	106 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	107 }
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	108 #endif // PRODUCT
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 void Metachunk::verify() {
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	111 #ifdef ASSERT
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	112 // 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	113 // headers with sizes.
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	114 assert(bottom() <= _top &&
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	115 _top <= (MetaWord*)end(),
7208 eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	116 "Chunk has been smashed");
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	117 #endif
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	118 return;
eade6b2e4782 8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp jmasa parents: diff changeset	119 }
12902 bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	120
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	121 /////////////// Unit tests ///////////////
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 #ifndef PRODUCT
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 class TestMetachunk {
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	126 public:
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	127 static void test() {
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	128 size_t size = 2 * 1024 * 1024;
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	129 void* memory = malloc(size);
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	130 assert(memory != NULL, "Failed to malloc 2MB");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	131
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	132 Metachunk* metachunk = ::new (memory) Metachunk(size / BytesPerWord, NULL);
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 assert(metachunk->bottom() == (MetaWord*)metachunk, "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	135 assert(metachunk->end() == (uintptr_t*)metachunk + metachunk->size(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	136
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	137 // Check sizes
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	138 assert(metachunk->size() == metachunk->word_size(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	139 assert(metachunk->word_size() == pointer_delta(metachunk->end(), metachunk->bottom(),
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	140 sizeof(MetaWord*)), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	141
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	142 // Check usage
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	143 assert(metachunk->used_word_size() == metachunk->overhead(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	144 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	145 assert(metachunk->top() == metachunk->initial_top(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	146 assert(metachunk->is_empty(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	147
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	148 // Allocate
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	149 size_t alloc_size = 64; // Words
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	150 assert(is_size_aligned(alloc_size, Metachunk::object_alignment()), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	151
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	152 MetaWord* mem = metachunk->allocate(alloc_size);
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 // Check post alloc
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	155 assert(mem == metachunk->initial_top(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	156 assert(mem + alloc_size == metachunk->top(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	157 assert(metachunk->used_word_size() == metachunk->overhead() + alloc_size, "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	158 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	159 assert(!metachunk->is_empty(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	160
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	161 // Clear chunk
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	162 metachunk->reset_empty();
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	163
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	164 // Check post clear
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	165 assert(metachunk->used_word_size() == metachunk->overhead(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	166 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	167 assert(metachunk->top() == metachunk->initial_top(), "assert");
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	168 assert(metachunk->is_empty(), "assert");
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 free(memory);
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 };
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 void TestMetachunk_test() {
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	175 TestMetachunk::test();
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	176 }
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	177
bdfbb1fb19ca 8026391: The Metachunk header wastes memory stefank parents: 10175 diff changeset	178 #endif

Mercurial > hg > truffle

annotate src/share/vm/memory/metachunk.cpp @ 14697:bac9ef65b71d