truffle: src/share/vm/gc_implementation/g1/heapRegionSet.cpp annotate

annotate src/share/vm/gc_implementation/g1/heapRegionSet.cpp @ 20377:a8ea2f110d87

8054819: Rename HeapRegionSeq to HeapRegionManager Reviewed-by: jwilhelm, jmasa

author	tschatzl
date	Tue, 26 Aug 2014 09:36:53 +0200
parents	1f1d373cd044
children	c02ec279b062

rev	line source
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	1 /*
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	2 * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	4 *
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	7 * published by the Free Software Foundation.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	8 *
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	13 * accompanied this code).
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	14 *
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	18 *
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	20 * or visit www.oracle.com if you need additional information or have any
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	21 * questions.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	22 *
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	23 */
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	24
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	25 #include "precompiled.hpp"
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	26 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	27 #include "gc_implementation/g1/heapRegionRemSet.hpp"
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	28 #include "gc_implementation/g1/heapRegionSet.inline.hpp"
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	29
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17773 diff changeset	30 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17773 diff changeset	31
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	32 uint FreeRegionList::_unrealistically_long_length = 0;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	33
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	34 void HeapRegionSetBase::fill_in_ext_msg(hrs_ext_msg* msg, const char* message) {
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	35 msg->append("[%s] %s ln: %u cy: "SIZE_FORMAT,
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	36 name(), message, length(), total_capacity_bytes());
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	37 fill_in_ext_msg_extra(msg);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	38 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	39
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	40 #ifndef PRODUCT
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	41 void HeapRegionSetBase::verify_region(HeapRegion* hr) {
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20337 diff changeset	42 assert(hr->containing_set() == this, err_msg("Inconsistent containing set for %u", hr->hrm_index()));
a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20337 diff changeset	43 assert(!hr->is_young(), err_msg("Adding young region %u", hr->hrm_index())); // currently we don't use these sets for young regions
a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20337 diff changeset	44 assert(hr->isHumongous() == regions_humongous(), err_msg("Wrong humongous state for region %u and set %s", hr->hrm_index(), name()));
a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20337 diff changeset	45 assert(hr->is_empty() == regions_empty(), err_msg("Wrong empty state for region %u and set %s", hr->hrm_index(), name()));
a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20337 diff changeset	46 assert(hr->rem_set()->verify_ready_for_par_iteration(), err_msg("Wrong iteration state %u", hr->hrm_index()));
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	47 }
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	48 #endif
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	49
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	50 void HeapRegionSetBase::verify() {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	51 // It's important that we also observe the MT safety protocol even
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	52 // for the verification calls. If we do verification without the
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	53 // appropriate locks and the set changes underneath our feet
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	54 // verification might fail and send us on a wild goose chase.
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	55 check_mt_safety();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	56
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	57 guarantee(( is_empty() && length() == 0 && total_capacity_bytes() == 0) \|\|
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	58 (!is_empty() && length() >= 0 && total_capacity_bytes() >= 0),
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	59 hrs_ext_msg(this, "invariant"));
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	60 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	61
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	62 void HeapRegionSetBase::verify_start() {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	63 // See comment in verify() about MT safety and verification.
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	64 check_mt_safety();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	65 assert(!_verify_in_progress,
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	66 hrs_ext_msg(this, "verification should not be in progress"));
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	67
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	68 // Do the basic verification first before we do the checks over the regions.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	69 HeapRegionSetBase::verify();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	70
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	71 _verify_in_progress = true;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	72 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	73
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	74 void HeapRegionSetBase::verify_end() {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	75 // See comment in verify() about MT safety and verification.
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	76 check_mt_safety();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	77 assert(_verify_in_progress,
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	78 hrs_ext_msg(this, "verification should be in progress"));
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	79
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	80 _verify_in_progress = false;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	81 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	82
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	83 void HeapRegionSetBase::print_on(outputStream* out, bool print_contents) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	84 out->cr();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	85 out->print_cr("Set: %s ("PTR_FORMAT")", name(), this);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	86 out->print_cr(" Region Assumptions");
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	87 out->print_cr(" humongous : %s", BOOL_TO_STR(regions_humongous()));
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	88 out->print_cr(" empty : %s", BOOL_TO_STR(regions_empty()));
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	89 out->print_cr(" Attributes");
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 4072 diff changeset	90 out->print_cr(" length : %14u", length());
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	91 out->print_cr(" total capacity : "SIZE_FORMAT_W(14)" bytes",
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	92 total_capacity_bytes());
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	93 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	94
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	95 HeapRegionSetBase::HeapRegionSetBase(const char* name, bool humongous, bool empty, HRSMtSafeChecker* mt_safety_checker)
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	96 : _name(name), _verify_in_progress(false),
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	97 _is_humongous(humongous), _is_empty(empty), _mt_safety_checker(mt_safety_checker),
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	98 _count()
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	99 { }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	100
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	101 void FreeRegionList::set_unrealistically_long_length(uint len) {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	102 guarantee(_unrealistically_long_length == 0, "should only be set once");
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	103 _unrealistically_long_length = len;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	104 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	105
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	106 void FreeRegionList::fill_in_ext_msg_extra(hrs_ext_msg* msg) {
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	107 msg->append(" hd: "PTR_FORMAT" tl: "PTR_FORMAT, _head, _tail);
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	108 }
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	109
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	110 void FreeRegionList::remove_all() {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	111 check_mt_safety();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	112 verify_optional();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	113
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	114 HeapRegion* curr = _head;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	115 while (curr != NULL) {
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	116 verify_region(curr);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	117
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	118 HeapRegion* next = curr->next();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	119 curr->set_next(NULL);
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	120 curr->set_prev(NULL);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	121 curr->set_containing_set(NULL);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	122 curr = next;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	123 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	124 clear();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	125
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	126 verify_optional();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	127 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	128
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	129 void FreeRegionList::add_ordered(FreeRegionList* from_list) {
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	130 check_mt_safety();
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	131 from_list->check_mt_safety();
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	132
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	133 verify_optional();
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	134 from_list->verify_optional();
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	135
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	136 if (from_list->is_empty()) {
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	137 return;
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	138 }
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	139
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	140 #ifdef ASSERT
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	141 FreeRegionListIterator iter(from_list);
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	142 while (iter.more_available()) {
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	143 HeapRegion* hr = iter.get_next();
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	144 // In set_containing_set() we check that we either set the value
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	145 // from NULL to non-NULL or vice versa to catch bugs. So, we have
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	146 // to NULL it first before setting it to the value.
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	147 hr->set_containing_set(NULL);
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	148 hr->set_containing_set(this);
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	149 }
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	150 #endif // ASSERT
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	151
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	152 if (is_empty()) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	153 assert(length() == 0 && _tail == NULL, hrs_ext_msg(this, "invariant"));
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	154 _head = from_list->_head;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	155 _tail = from_list->_tail;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	156 } else {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	157 HeapRegion* curr_to = _head;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	158 HeapRegion* curr_from = from_list->_head;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	159
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	160 while (curr_from != NULL) {
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20337 diff changeset	161 while (curr_to != NULL && curr_to->hrm_index() < curr_from->hrm_index()) {
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	162 curr_to = curr_to->next();
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	163 }
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	164
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	165 if (curr_to == NULL) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	166 // The rest of the from list should be added as tail
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	167 _tail->set_next(curr_from);
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	168 curr_from->set_prev(_tail);
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	169 curr_from = NULL;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	170 } else {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	171 HeapRegion* next_from = curr_from->next();
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	172
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	173 curr_from->set_next(curr_to);
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	174 curr_from->set_prev(curr_to->prev());
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	175 if (curr_to->prev() == NULL) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	176 _head = curr_from;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	177 } else {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	178 curr_to->prev()->set_next(curr_from);
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	179 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	180 curr_to->set_prev(curr_from);
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	181
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	182 curr_from = next_from;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	183 }
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	184 }
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	185
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20337 diff changeset	186 if (_tail->hrm_index() < from_list->_tail->hrm_index()) {
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	187 _tail = from_list->_tail;
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	188 }
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	189 }
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	190
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	191 _count.increment(from_list->length(), from_list->total_capacity_bytes());
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	192 from_list->clear();
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	193
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	194 verify_optional();
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	195 from_list->verify_optional();
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	196 }
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	197
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	198 void FreeRegionList::remove_starting_at(HeapRegion* first, uint num_regions) {
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	199 check_mt_safety();
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	200 assert(num_regions >= 1, hrs_ext_msg(this, "pre-condition"));
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	201 assert(!is_empty(), hrs_ext_msg(this, "pre-condition"));
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	202
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	203 verify_optional();
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 4072 diff changeset	204 DEBUG_ONLY(uint old_length = length();)
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	205
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	206 HeapRegion* curr = first;
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 4072 diff changeset	207 uint count = 0;
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	208 while (count < num_regions) {
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	209 verify_region(curr);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	210 HeapRegion* next = curr->next();
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	211 HeapRegion* prev = curr->prev();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	212
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	213 assert(count < num_regions,
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	214 hrs_err_msg("[%s] should not come across more regions "
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	215 "pending for removal than num_regions: %u",
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	216 name(), num_regions));
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	217
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	218 if (prev == NULL) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	219 assert(_head == curr, hrs_ext_msg(this, "invariant"));
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	220 _head = next;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	221 } else {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	222 assert(_head != curr, hrs_ext_msg(this, "invariant"));
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	223 prev->set_next(next);
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	224 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	225 if (next == NULL) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	226 assert(_tail == curr, hrs_ext_msg(this, "invariant"));
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	227 _tail = prev;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	228 } else {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	229 assert(_tail != curr, hrs_ext_msg(this, "invariant"));
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	230 next->set_prev(prev);
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	231 }
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	232 if (_last = curr) {
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	233 _last = NULL;
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	234 }
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	235
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	236 curr->set_next(NULL);
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	237 curr->set_prev(NULL);
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	238 remove(curr);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	239
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	240 count++;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	241 curr = next;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	242 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	243
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	244 assert(count == num_regions,
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	245 hrs_err_msg("[%s] count: %u should be == num_regions: %u",
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	246 name(), count, num_regions));
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	247 assert(length() + num_regions == old_length,
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2152 diff changeset	248 hrs_err_msg("[%s] new length should be consistent "
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	249 "new length: %u old length: %u num_regions: %u",
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	250 name(), length(), old_length, num_regions));
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	251
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	252 verify_optional();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	253 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	254
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	255 void FreeRegionList::verify() {
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	256 // See comment in HeapRegionSetBase::verify() about MT safety and
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	257 // verification.
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	258 check_mt_safety();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	259
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	260 // This will also do the basic verification too.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	261 verify_start();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	262
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	263 verify_list();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	264
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	265 verify_end();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	266 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	267
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	268 void FreeRegionList::clear() {
58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	269 _count = HeapRegionSetCount();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	270 _head = NULL;
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	271 _tail = NULL;
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	272 _last = NULL;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	273 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	274
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	275 void FreeRegionList::print_on(outputStream* out, bool print_contents) {
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	276 HeapRegionSetBase::print_on(out, print_contents);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	277 out->print_cr(" Linking");
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	278 out->print_cr(" head : "PTR_FORMAT, _head);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	279 out->print_cr(" tail : "PTR_FORMAT, _tail);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	280
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	281 if (print_contents) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	282 out->print_cr(" Contents");
17736 58fc1b1523dc 8034079: G1: Refactor the HeapRegionSet hierarchy brutisso parents: 6254 diff changeset	283 FreeRegionListIterator iter(this);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	284 while (iter.more_available()) {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	285 HeapRegion* hr = iter.get_next();
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	286 hr->print_on(out);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	287 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	288 }
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	289
6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	290 out->cr();
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: diff changeset	291 }
17737 0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	292
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	293 void FreeRegionList::verify_list() {
20336 6701abbc4441 8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data tschatzl parents: 17937 diff changeset	294 HeapRegion* curr = _head;
17737 0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	295 HeapRegion* prev1 = NULL;
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	296 HeapRegion* prev0 = NULL;
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	297 uint count = 0;
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	298 size_t capacity = 0;
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	299 uint last_index = 0;
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	300
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	301 guarantee(_head == NULL \|\| _head->prev() == NULL, "_head should not have a prev");
17737 0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	302 while (curr != NULL) {
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	303 verify_region(curr);
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	304
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	305 count++;
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	306 guarantee(count < _unrealistically_long_length,
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	307 hrs_err_msg("[%s] the calculated length: %u seems very long, is there maybe a cycle? curr: "PTR_FORMAT" prev0: "PTR_FORMAT" " "prev1: "PTR_FORMAT" length: %u", name(), count, curr, prev0, prev1, length()));
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	308
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	309 if (curr->next() != NULL) {
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	310 guarantee(curr->next()->prev() == curr, "Next or prev pointers messed up");
8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	311 }
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20337 diff changeset	312 guarantee(curr->hrm_index() == 0 \|\| curr->hrm_index() > last_index, "List should be sorted");
a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20337 diff changeset	313 last_index = curr->hrm_index();
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	314
17737 0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	315 capacity += curr->capacity();
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	316
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	317 prev1 = prev0;
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	318 prev0 = curr;
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	319 curr = curr->next();
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	320 }
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	321
20377 a8ea2f110d87 8054819: Rename HeapRegionSeq to HeapRegionManager tschatzl parents: 20337 diff changeset	322 guarantee(_tail == prev0, err_msg("Expected %s to end with %u but it ended with %u.", name(), _tail->hrm_index(), prev0->hrm_index()));
17773 8ee855b4e667 8036025: Sort the freelist in order to shrink the heap jwilhelm parents: 17737 diff changeset	323 guarantee(_tail == NULL \|\| _tail->next() == NULL, "_tail should not have a next");
17737 0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	324 guarantee(length() == count, err_msg("%s count mismatch. Expected %u, actual %u.", name(), length(), count));
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	325 guarantee(total_capacity_bytes() == capacity, err_msg("%s capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT,
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	326 name(), total_capacity_bytes(), capacity));
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	327 }
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	328
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	329 // Note on the check_mt_safety() methods below:
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	330 //
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	331 // Verification of the "master" heap region sets / lists that are
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	332 // maintained by G1CollectedHeap is always done during a STW pause and
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	333 // by the VM thread at the start / end of the pause. The standard
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	334 // verification methods all assert check_mt_safety(). This is
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	335 // important as it ensures that verification is done without
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	336 // concurrent updates taking place at the same time. It follows, that,
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	337 // for the "master" heap region sets / lists, the check_mt_safety()
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	338 // method should include the VM thread / STW case.
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	339
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	340 void MasterFreeRegionListMtSafeChecker::check() {
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	341 // Master Free List MT safety protocol:
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	342 // (a) If we're at a safepoint, operations on the master free list
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	343 // should be invoked by either the VM thread (which will serialize
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	344 // them) or by the GC workers while holding the
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	345 // FreeList_lock.
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	346 // (b) If we're not at a safepoint, operations on the master free
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	347 // list should be invoked while holding the Heap_lock.
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	348
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	349 if (SafepointSynchronize::is_at_safepoint()) {
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	350 guarantee(Thread::current()->is_VM_thread() \|\|
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	351 FreeList_lock->owned_by_self(), "master free list MT safety protocol at a safepoint");
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	352 } else {
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	353 guarantee(Heap_lock->owned_by_self(), "master free list MT safety protocol outside a safepoint");
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	354 }
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	355 }
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	356
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	357 void SecondaryFreeRegionListMtSafeChecker::check() {
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	358 // Secondary Free List MT safety protocol:
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	359 // Operations on the secondary free list should always be invoked
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	360 // while holding the SecondaryFreeList_lock.
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	361
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	362 guarantee(SecondaryFreeList_lock->owned_by_self(), "secondary free list MT safety protocol");
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	363 }
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	364
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	365 void OldRegionSetMtSafeChecker::check() {
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	366 // Master Old Set MT safety protocol:
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	367 // (a) If we're at a safepoint, operations on the master old set
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	368 // should be invoked:
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	369 // - by the VM thread (which will serialize them), or
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	370 // - by the GC workers while holding the FreeList_lock, if we're
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	371 // at a safepoint for an evacuation pause (this lock is taken
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	372 // anyway when an GC alloc region is retired so that a new one
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	373 // is allocated from the free list), or
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	374 // - by the GC workers while holding the OldSets_lock, if we're at a
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	375 // safepoint for a cleanup pause.
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	376 // (b) If we're not at a safepoint, operations on the master old set
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	377 // should be invoked while holding the Heap_lock.
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	378
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	379 if (SafepointSynchronize::is_at_safepoint()) {
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	380 guarantee(Thread::current()->is_VM_thread()
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	381 \|\| FreeList_lock->owned_by_self() \|\| OldSets_lock->owned_by_self(),
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	382 "master old set MT safety protocol at a safepoint");
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	383 } else {
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	384 guarantee(Heap_lock->owned_by_self(), "master old set MT safety protocol outside a safepoint");
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	385 }
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	386 }
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	387
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	388 void HumongousRegionSetMtSafeChecker::check() {
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	389 // Humongous Set MT safety protocol:
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	390 // (a) If we're at a safepoint, operations on the master humongous
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	391 // set should be invoked by either the VM thread (which will
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	392 // serialize them) or by the GC workers while holding the
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	393 // OldSets_lock.
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	394 // (b) If we're not at a safepoint, operations on the master
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	395 // humongous set should be invoked while holding the Heap_lock.
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	396
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	397 if (SafepointSynchronize::is_at_safepoint()) {
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	398 guarantee(Thread::current()->is_VM_thread() \|\|
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	399 OldSets_lock->owned_by_self(),
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	400 "master humongous set MT safety protocol at a safepoint");
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	401 } else {
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	402 guarantee(Heap_lock->owned_by_self(),
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	403 "master humongous set MT safety protocol outside a safepoint");
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	404 }
0d2ce7411240 8037407: G1: Remove heapRegionSets.cpp brutisso parents: 17736 diff changeset	405 }
20337 1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	406
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	407 void FreeRegionList_test() {
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	408 FreeRegionList l("test");
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	409
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	410 const uint num_regions_in_test = 5;
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	411 // Create a fake heap. It does not need to be valid, as the HeapRegion constructor
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	412 // does not access it.
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	413 MemRegion heap(NULL, num_regions_in_test * HeapRegion::GrainWords);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	414 // Allocate a fake BOT because the HeapRegion constructor initializes
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	415 // the BOT.
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	416 size_t bot_size = G1BlockOffsetSharedArray::compute_size(heap.word_size());
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	417 HeapWord* bot_data = NEW_C_HEAP_ARRAY(HeapWord, bot_size, mtGC);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	418 ReservedSpace bot_rs(G1BlockOffsetSharedArray::compute_size(heap.word_size()));
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	419 G1RegionToSpaceMapper* bot_storage =
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	420 G1RegionToSpaceMapper::create_mapper(bot_rs,
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	421 os::vm_page_size(),
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	422 HeapRegion::GrainBytes,
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	423 G1BlockOffsetSharedArray::N_bytes,
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	424 mtGC);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	425 G1BlockOffsetSharedArray oa(heap, bot_storage);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	426 bot_storage->commit_regions(0, num_regions_in_test);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	427 HeapRegion hr0(0, &oa, heap);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	428 HeapRegion hr1(1, &oa, heap);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	429 HeapRegion hr2(2, &oa, heap);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	430 HeapRegion hr3(3, &oa, heap);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	431 HeapRegion hr4(4, &oa, heap);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	432 l.add_ordered(&hr1);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	433 l.add_ordered(&hr0);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	434 l.add_ordered(&hr3);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	435 l.add_ordered(&hr4);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	436 l.add_ordered(&hr2);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	437 assert(l.length() == num_regions_in_test, "wrong length");
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	438 l.verify_list();
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	439
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	440 bot_storage->uncommit_regions(0, num_regions_in_test);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	441 delete bot_storage;
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	442 FREE_C_HEAP_ARRAY(HeapWord, bot_data, mtGC);
1f1d373cd044 8038423: G1: Decommit memory within heap tschatzl parents: 20336 diff changeset	443 }

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/g1/heapRegionSet.cpp @ 20377:a8ea2f110d87