graal-jvmci-8: src/share/vm/gc_implementation/g1/g1AllocRegion.cpp annotate

annotate src/share/vm/gc_implementation/g1/g1AllocRegion.cpp @ 20211:82693fb204a5

8038930: G1CodeRootSet::test fails with assert(_num_chunks_handed_out == 0) failed: No elements must have been handed out yet Summary: The test incorrectly assumed that it had been started with no other previous compilation activity. Fix this by allowing multiple code root free chunk lists, and use one separate from the global one to perform the test. Reviewed-by: brutisso

author	tschatzl
date	Wed, 16 Apr 2014 10:14:50 +0200
parents	ce8f6bb717c9
children	227a9e5e4b4a

rev	line source
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	1 /*
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 6010 diff changeset	2 * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	4 *
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	7 * published by the Free Software Foundation.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	8 *
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	13 * accompanied this code).
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	14 *
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	18 *
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	20 * or visit www.oracle.com if you need additional information or have any
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	21 * questions.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	22 *
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	23 */
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	24
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	25 #include "precompiled.hpp"
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	26 #include "gc_implementation/g1/g1AllocRegion.inline.hpp"
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	27 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
20197 ce8f6bb717c9 8042195: Introduce umbrella header orderAccess.inline.hpp. goetz parents: 17937 diff changeset	28 #include "runtime/orderAccess.inline.hpp"
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	29
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	30 G1CollectedHeap* G1AllocRegion::_g1h = NULL;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	31 HeapRegion* G1AllocRegion::_dummy_region = NULL;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	32
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	33 void G1AllocRegion::setup(G1CollectedHeap* g1h, HeapRegion* dummy_region) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	34 assert(_dummy_region == NULL, "should be set once");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	35 assert(dummy_region != NULL, "pre-condition");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	36 assert(dummy_region->free() == 0, "pre-condition");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	37
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	38 // Make sure that any allocation attempt on this region will fail
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	39 // and will not trigger any asserts.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	40 assert(allocate(dummy_region, 1, false) == NULL, "should fail");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	41 assert(par_allocate(dummy_region, 1, false) == NULL, "should fail");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	42 assert(allocate(dummy_region, 1, true) == NULL, "should fail");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	43 assert(par_allocate(dummy_region, 1, true) == NULL, "should fail");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	44
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	45 _g1h = g1h;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	46 _dummy_region = dummy_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	47 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	48
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	49 void G1AllocRegion::fill_up_remaining_space(HeapRegion* alloc_region,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	50 bool bot_updates) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	51 assert(alloc_region != NULL && alloc_region != _dummy_region,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	52 "pre-condition");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	53
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	54 // Other threads might still be trying to allocate using a CAS out
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	55 // of the region we are trying to retire, as they can do so without
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	56 // holding the lock. So, we first have to make sure that noone else
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	57 // can allocate out of it by doing a maximal allocation. Even if our
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	58 // CAS attempt fails a few times, we'll succeed sooner or later
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	59 // given that failed CAS attempts mean that the region is getting
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	60 // closed to being full.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	61 size_t free_word_size = alloc_region->free() / HeapWordSize;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	62
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	63 // This is the minimum free chunk we can turn into a dummy
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	64 // object. If the free space falls below this, then noone can
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	65 // allocate in this region anyway (all allocation requests will be
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	66 // of a size larger than this) so we won't have to perform the dummy
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	67 // allocation.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	68 size_t min_word_size_to_fill = CollectedHeap::min_fill_size();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	69
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	70 while (free_word_size >= min_word_size_to_fill) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	71 HeapWord* dummy = par_allocate(alloc_region, free_word_size, bot_updates);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	72 if (dummy != NULL) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	73 // If the allocation was successful we should fill in the space.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	74 CollectedHeap::fill_with_object(dummy, free_word_size);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	75 alloc_region->set_pre_dummy_top(dummy);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	76 break;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	77 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	78
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	79 free_word_size = alloc_region->free() / HeapWordSize;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	80 // It's also possible that someone else beats us to the
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	81 // allocation and they fill up the region. In that case, we can
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	82 // just get out of the loop.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	83 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	84 assert(alloc_region->free() / HeapWordSize < min_word_size_to_fill,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	85 "post-condition");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	86 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	87
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	88 void G1AllocRegion::retire(bool fill_up) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	89 assert(_alloc_region != NULL, ar_ext_msg(this, "not initialized properly"));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	90
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	91 trace("retiring");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	92 HeapRegion* alloc_region = _alloc_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	93 if (alloc_region != _dummy_region) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	94 // We never have to check whether the active region is empty or not,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	95 // and potentially free it if it is, given that it's guaranteed that
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	96 // it will never be empty.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	97 assert(!alloc_region->is_empty(),
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	98 ar_ext_msg(this, "the alloc region should never be empty"));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	99
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	100 if (fill_up) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	101 fill_up_remaining_space(alloc_region, _bot_updates);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	102 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	103
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	104 assert(alloc_region->used() >= _used_bytes_before,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	105 ar_ext_msg(this, "invariant"));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	106 size_t allocated_bytes = alloc_region->used() - _used_bytes_before;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	107 retire_region(alloc_region, allocated_bytes);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	108 _used_bytes_before = 0;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	109 _alloc_region = _dummy_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	110 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	111 trace("retired");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	112 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	113
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	114 HeapWord* G1AllocRegion::new_alloc_region_and_allocate(size_t word_size,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	115 bool force) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	116 assert(_alloc_region == _dummy_region, ar_ext_msg(this, "pre-condition"));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	117 assert(_used_bytes_before == 0, ar_ext_msg(this, "pre-condition"));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	118
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	119 trace("attempting region allocation");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	120 HeapRegion* new_alloc_region = allocate_new_region(word_size, force);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	121 if (new_alloc_region != NULL) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	122 new_alloc_region->reset_pre_dummy_top();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	123 // Need to do this before the allocation
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	124 _used_bytes_before = new_alloc_region->used();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	125 HeapWord* result = allocate(new_alloc_region, word_size, _bot_updates);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	126 assert(result != NULL, ar_ext_msg(this, "the allocation should succeeded"));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	127
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	128 OrderAccess::storestore();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	129 // Note that we first perform the allocation and then we store the
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	130 // region in _alloc_region. This is the reason why an active region
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	131 // can never be empty.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	132 _alloc_region = new_alloc_region;
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	133 _count += 1;
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	134 trace("region allocation successful");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	135 return result;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	136 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	137 trace("region allocation failed");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	138 return NULL;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	139 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	140 ShouldNotReachHere();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	141 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	142
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	143 void G1AllocRegion::fill_in_ext_msg(ar_ext_msg* msg, const char* message) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 3830 diff changeset	144 msg->append("[%s] %s c: %u b: %s r: "PTR_FORMAT" u: "SIZE_FORMAT,
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	145 _name, message, _count, BOOL_TO_STR(_bot_updates),
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 6010 diff changeset	146 p2i(_alloc_region), _used_bytes_before);
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	147 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	148
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	149 void G1AllocRegion::init() {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	150 trace("initializing");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	151 assert(_alloc_region == NULL && _used_bytes_before == 0,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	152 ar_ext_msg(this, "pre-condition"));
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	153 assert(_dummy_region != NULL, ar_ext_msg(this, "should have been set"));
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	154 _alloc_region = _dummy_region;
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	155 _count = 0;
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	156 trace("initialized");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	157 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	158
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	159 void G1AllocRegion::set(HeapRegion* alloc_region) {
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	160 trace("setting");
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	161 // We explicitly check that the region is not empty to make sure we
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	162 // maintain the "the alloc region cannot be empty" invariant.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	163 assert(alloc_region != NULL && !alloc_region->is_empty(),
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	164 ar_ext_msg(this, "pre-condition"));
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	165 assert(_alloc_region == _dummy_region &&
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	166 _used_bytes_before == 0 && _count == 0,
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	167 ar_ext_msg(this, "pre-condition"));
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	168
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	169 _used_bytes_before = alloc_region->used();
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	170 _alloc_region = alloc_region;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	171 _count += 1;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	172 trace("set");
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	173 }
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	174
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	175 HeapRegion* G1AllocRegion::release() {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	176 trace("releasing");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	177 HeapRegion* alloc_region = _alloc_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	178 retire(false /* fill_up */);
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	179 assert(_alloc_region == _dummy_region,
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	180 ar_ext_msg(this, "post-condition of retire()"));
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	181 _alloc_region = NULL;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	182 trace("released");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	183 return (alloc_region == _dummy_region) ? NULL : alloc_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	184 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	185
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	186 #if G1_ALLOC_REGION_TRACING
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	187 void G1AllocRegion::trace(const char* str, size_t word_size, HeapWord* result) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	188 // All the calls to trace that set either just the size or the size
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	189 // and the result are considered part of level 2 tracing and are
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	190 // skipped during level 1 tracing.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	191 if ((word_size == 0 && result == NULL) \|\| (G1_ALLOC_REGION_TRACING > 1)) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	192 const size_t buffer_length = 128;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	193 char hr_buffer[buffer_length];
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	194 char rest_buffer[buffer_length];
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	195
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	196 HeapRegion* alloc_region = _alloc_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	197 if (alloc_region == NULL) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	198 jio_snprintf(hr_buffer, buffer_length, "NULL");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	199 } else if (alloc_region == _dummy_region) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	200 jio_snprintf(hr_buffer, buffer_length, "DUMMY");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	201 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	202 jio_snprintf(hr_buffer, buffer_length,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	203 HR_FORMAT, HR_FORMAT_PARAMS(alloc_region));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	204 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	205
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	206 if (G1_ALLOC_REGION_TRACING > 1) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	207 if (result != NULL) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	208 jio_snprintf(rest_buffer, buffer_length, SIZE_FORMAT" "PTR_FORMAT,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	209 word_size, result);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	210 } else if (word_size != 0) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	211 jio_snprintf(rest_buffer, buffer_length, SIZE_FORMAT, word_size);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	212 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	213 jio_snprintf(rest_buffer, buffer_length, "");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	214 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	215 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	216 jio_snprintf(rest_buffer, buffer_length, "");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	217 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	218
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 3830 diff changeset	219 tty->print_cr("[%s] %u %s : %s %s",
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	220 _name, _count, hr_buffer, str, rest_buffer);
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	221 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	222 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	223 #endif // G1_ALLOC_REGION_TRACING
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	224
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	225 G1AllocRegion::G1AllocRegion(const char* name,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	226 bool bot_updates)
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	227 : _name(name), _bot_updates(bot_updates),
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	228 _alloc_region(NULL), _count(0), _used_bytes_before(0) { }
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	229

Mercurial > hg > graal-jvmci-8

annotate src/share/vm/gc_implementation/g1/g1AllocRegion.cpp @ 20211:82693fb204a5