truffle: src/share/vm/memory/iterator.hpp annotate

annotate src/share/vm/memory/iterator.hpp @ 20804:7848fc12602b

Merge with jdk8u40-b25

author	Gilles Duboscq <gilles.m.duboscq@oracle.com>
date	Tue, 07 Apr 2015 14:58:49 +0200
parents	89152779163c 2c6ef90f030a
children

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
14223 de6a9e811145 8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013 mikael parents: 10327 diff changeset	2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1190 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1190 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1190 diff changeset	21 * questions.
0 a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	25 #ifndef SHARE_VM_MEMORY_ITERATOR_HPP
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	26 #define SHARE_VM_MEMORY_ITERATOR_HPP
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	27
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	28 #include "memory/allocation.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	29 #include "memory/memRegion.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	30 #include "runtime/prefetch.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	31 #include "utilities/top.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	32
0 a61af66fc99e Initial load duke parents: diff changeset	33 // The following classes are C++ `closures` for iterating over objects, roots and spaces
a61af66fc99e Initial load duke parents: diff changeset	34
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	35 class CodeBlob;
994 753cf9794df9 6885169: merge of 4957990 and 6863023 causes conflict on do_nmethods jrose parents: 993 diff changeset	36 class nmethod;
0 a61af66fc99e Initial load duke parents: diff changeset	37 class ReferenceProcessor;
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 935 diff changeset	38 class DataLayout;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	39 class KlassClosure;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	40 class ClassLoaderData;
0 a61af66fc99e Initial load duke parents: diff changeset	41
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	42 // Closure provides abortability.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	43
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	44 class Closure : public StackObj {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	45 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	46 bool _abort;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	47 void set_abort() { _abort = true; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	48 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	49 Closure() : _abort(false) {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	50 // A subtype can use this mechanism to indicate to some iterator mapping
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	51 // functions that the iteration should cease.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	52 bool abort() { return _abort; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	53 void clear_abort() { _abort = false; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	54 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	55
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	56 // OopClosure is used for iterating through references to Java objects.
0 a61af66fc99e Initial load duke parents: diff changeset	57
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	58 class OopClosure : public Closure {
0 a61af66fc99e Initial load duke parents: diff changeset	59 public:
a61af66fc99e Initial load duke parents: diff changeset	60 virtual void do_oop(oop* o) = 0;
a61af66fc99e Initial load duke parents: diff changeset	61 virtual void do_oop_v(oop* o) { do_oop(o); }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	62 virtual void do_oop(narrowOop* o) = 0;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	63 virtual void do_oop_v(narrowOop* o) { do_oop(o); }
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	64 };
935 05f89f00a864 6798898: CMS: bugs related to class unloading jmasa parents: 356 diff changeset	65
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	66 // ExtendedOopClosure adds extra code to be run during oop iterations.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	67 // This is needed by the GC and is extracted to a separate type to not
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	68 // pollute the OopClosure interface.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	69 class ExtendedOopClosure : public OopClosure {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	70 public:
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	71 ReferenceProcessor* _ref_processor;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	72 ExtendedOopClosure(ReferenceProcessor* rp) : _ref_processor(rp) { }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	73 ExtendedOopClosure() : OopClosure(), _ref_processor(NULL) { }
0 a61af66fc99e Initial load duke parents: diff changeset	74
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	75 // If the do_metadata functions return "true",
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	76 // we invoke the following when running oop_iterate():
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	77 //
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	78 // 1) do_klass on the header klass pointer.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	79 // 2) do_klass on the klass pointer in the mirrors.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	80 // 3) do_class_loader_data on the class loader data in class loaders.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	81 //
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	82 // The virtual (without suffix) and the non-virtual (with _nv suffix) need
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	83 // to be updated together, or else the devirtualization will break.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	84 //
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	85 // Providing default implementations of the _nv functions unfortunately
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	86 // removes the compile-time safeness, but reduces the clutter for the
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	87 // ExtendedOopClosures that don't need to walk the metadata.
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	88 // Currently, only CMS and G1 need these.
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 935 diff changeset	89
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	90 virtual bool do_metadata() { return do_metadata_nv(); }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	91 bool do_metadata_v() { return do_metadata(); }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	92 bool do_metadata_nv() { return false; }
0 a61af66fc99e Initial load duke parents: diff changeset	93
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	94 virtual void do_klass(Klass* k) { do_klass_nv(k); }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	95 void do_klass_v(Klass* k) { do_klass(k); }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	96 void do_klass_nv(Klass* k) { ShouldNotReachHere(); }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	97
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	98 virtual void do_class_loader_data(ClassLoaderData* cld) { ShouldNotReachHere(); }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	99
0 a61af66fc99e Initial load duke parents: diff changeset	100 // Controls how prefetching is done for invocations of this closure.
a61af66fc99e Initial load duke parents: diff changeset	101 Prefetch::style prefetch_style() { // Note that this is non-virtual.
a61af66fc99e Initial load duke parents: diff changeset	102 return Prefetch::do_none;
a61af66fc99e Initial load duke parents: diff changeset	103 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	104
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	105 // True iff this closure may be safely applied more than once to an oop
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	106 // location without an intervening "major reset" (like the end of a GC).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	107 virtual bool idempotent() { return false; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	108 virtual bool apply_to_weak_ref_discovered_field() { return false; }
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	109 };
935 05f89f00a864 6798898: CMS: bugs related to class unloading jmasa parents: 356 diff changeset	110
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	111 // Wrapper closure only used to implement oop_iterate_no_header().
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	112 class NoHeaderExtendedOopClosure : public ExtendedOopClosure {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	113 OopClosure* _wrapped_closure;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	114 public:
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	115 NoHeaderExtendedOopClosure(OopClosure* cl) : _wrapped_closure(cl) {}
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	116 // Warning: this calls the virtual version do_oop in the the wrapped closure.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	117 void do_oop_nv(oop* p) { _wrapped_closure->do_oop(p); }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	118 void do_oop_nv(narrowOop* p) { _wrapped_closure->do_oop(p); }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	119
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	120 void do_oop(oop* p) { assert(false, "Only the _nv versions should be used");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	121 _wrapped_closure->do_oop(p); }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	122 void do_oop(narrowOop* p) { assert(false, "Only the _nv versions should be used");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	123 _wrapped_closure->do_oop(p);}
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	124 };
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	125
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	126 class KlassClosure : public Closure {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	127 public:
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	128 virtual void do_klass(Klass* k) = 0;
0 a61af66fc99e Initial load duke parents: diff changeset	129 };
a61af66fc99e Initial load duke parents: diff changeset	130
14483 be0ac0e8f6e7 8035393: Use CLDClosure instead of CLDToOopClosure in frame::oops_interpreted_do stefank parents: 14223 diff changeset	131 class CLDClosure : public Closure {
be0ac0e8f6e7 8035393: Use CLDClosure instead of CLDToOopClosure in frame::oops_interpreted_do stefank parents: 14223 diff changeset	132 public:
be0ac0e8f6e7 8035393: Use CLDClosure instead of CLDToOopClosure in frame::oops_interpreted_do stefank parents: 14223 diff changeset	133 virtual void do_cld(ClassLoaderData* cld) = 0;
be0ac0e8f6e7 8035393: Use CLDClosure instead of CLDToOopClosure in frame::oops_interpreted_do stefank parents: 14223 diff changeset	134 };
be0ac0e8f6e7 8035393: Use CLDClosure instead of CLDToOopClosure in frame::oops_interpreted_do stefank parents: 14223 diff changeset	135
6738 ec98e58952b2 7197350: NPG: jvmtiHeapReferenceCallback receives incorrect reference_kind for system class roots stefank parents: 6725 diff changeset	136 class KlassToOopClosure : public KlassClosure {
20268 4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	137 friend class MetadataAwareOopClosure;
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	138 friend class MetadataAwareOopsInGenClosure;
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	139
6738 ec98e58952b2 7197350: NPG: jvmtiHeapReferenceCallback receives incorrect reference_kind for system class roots stefank parents: 6725 diff changeset	140 OopClosure* _oop_closure;
20268 4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	141
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	142 // Used when _oop_closure couldn't be set in an initialization list.
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	143 void initialize(OopClosure* oop_closure) {
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	144 assert(_oop_closure == NULL, "Should only be called once");
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	145 _oop_closure = oop_closure;
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	146 }
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	147
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	148 public:
20268 4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	149 KlassToOopClosure(OopClosure* oop_closure = NULL) : _oop_closure(oop_closure) {}
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	150
6738 ec98e58952b2 7197350: NPG: jvmtiHeapReferenceCallback receives incorrect reference_kind for system class roots stefank parents: 6725 diff changeset	151 virtual void do_klass(Klass* k);
ec98e58952b2 7197350: NPG: jvmtiHeapReferenceCallback receives incorrect reference_kind for system class roots stefank parents: 6725 diff changeset	152 };
ec98e58952b2 7197350: NPG: jvmtiHeapReferenceCallback receives incorrect reference_kind for system class roots stefank parents: 6725 diff changeset	153
14483 be0ac0e8f6e7 8035393: Use CLDClosure instead of CLDToOopClosure in frame::oops_interpreted_do stefank parents: 14223 diff changeset	154 class CLDToOopClosure : public CLDClosure {
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	155 OopClosure* _oop_closure;
7179 d0aa87f04bd5 8003720: NPG: Method in interpreter stack frame can be deallocated stefank parents: 6738 diff changeset	156 KlassToOopClosure _klass_closure;
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	157 bool _must_claim_cld;
7179 d0aa87f04bd5 8003720: NPG: Method in interpreter stack frame can be deallocated stefank parents: 6738 diff changeset	158
d0aa87f04bd5 8003720: NPG: Method in interpreter stack frame can be deallocated stefank parents: 6738 diff changeset	159 public:
d0aa87f04bd5 8003720: NPG: Method in interpreter stack frame can be deallocated stefank parents: 6738 diff changeset	160 CLDToOopClosure(OopClosure* oop_closure, bool must_claim_cld = true) :
d0aa87f04bd5 8003720: NPG: Method in interpreter stack frame can be deallocated stefank parents: 6738 diff changeset	161 _oop_closure(oop_closure),
d0aa87f04bd5 8003720: NPG: Method in interpreter stack frame can be deallocated stefank parents: 6738 diff changeset	162 _klass_closure(oop_closure),
d0aa87f04bd5 8003720: NPG: Method in interpreter stack frame can be deallocated stefank parents: 6738 diff changeset	163 _must_claim_cld(must_claim_cld) {}
d0aa87f04bd5 8003720: NPG: Method in interpreter stack frame can be deallocated stefank parents: 6738 diff changeset	164
d0aa87f04bd5 8003720: NPG: Method in interpreter stack frame can be deallocated stefank parents: 6738 diff changeset	165 void do_cld(ClassLoaderData* cld);
d0aa87f04bd5 8003720: NPG: Method in interpreter stack frame can be deallocated stefank parents: 6738 diff changeset	166 };
d0aa87f04bd5 8003720: NPG: Method in interpreter stack frame can be deallocated stefank parents: 6738 diff changeset	167
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	168 class CLDToKlassAndOopClosure : public CLDClosure {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	169 friend class SharedHeap;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	170 friend class G1CollectedHeap;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	171 protected:
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	172 OopClosure* _oop_closure;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	173 KlassClosure* _klass_closure;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	174 bool _must_claim_cld;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	175 public:
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	176 CLDToKlassAndOopClosure(KlassClosure* klass_closure,
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	177 OopClosure* oop_closure,
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	178 bool must_claim_cld) :
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	179 _oop_closure(oop_closure),
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	180 _klass_closure(klass_closure),
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	181 _must_claim_cld(must_claim_cld) {}
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	182 void do_cld(ClassLoaderData* cld);
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	183 };
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	184
20268 4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	185 // The base class for all concurrent marking closures,
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	186 // that participates in class unloading.
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	187 // It's used to proxy through the metadata to the oops defined in them.
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	188 class MetadataAwareOopClosure: public ExtendedOopClosure {
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	189 KlassToOopClosure _klass_closure;
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	190
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	191 public:
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	192 MetadataAwareOopClosure() : ExtendedOopClosure() {
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	193 _klass_closure.initialize(this);
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	194 }
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	195 MetadataAwareOopClosure(ReferenceProcessor* rp) : ExtendedOopClosure(rp) {
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	196 _klass_closure.initialize(this);
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	197 }
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	198
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	199 virtual bool do_metadata() { return do_metadata_nv(); }
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	200 inline bool do_metadata_nv() { return true; }
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	201
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	202 virtual void do_klass(Klass* k);
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	203 void do_klass_nv(Klass* k);
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	204
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	205 virtual void do_class_loader_data(ClassLoaderData* cld);
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	206 };
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	207
0 a61af66fc99e Initial load duke parents: diff changeset	208 // ObjectClosure is used for iterating through an object space
a61af66fc99e Initial load duke parents: diff changeset	209
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	210 class ObjectClosure : public Closure {
0 a61af66fc99e Initial load duke parents: diff changeset	211 public:
a61af66fc99e Initial load duke parents: diff changeset	212 // Called for each object.
a61af66fc99e Initial load duke parents: diff changeset	213 virtual void do_object(oop obj) = 0;
a61af66fc99e Initial load duke parents: diff changeset	214 };
a61af66fc99e Initial load duke parents: diff changeset	215
a61af66fc99e Initial load duke parents: diff changeset	216
10327 001ec9515f84 8014277: Remove ObjectClosure as base class for BoolObjectClosure ehelin parents: 7179 diff changeset	217 class BoolObjectClosure : public Closure {
0 a61af66fc99e Initial load duke parents: diff changeset	218 public:
a61af66fc99e Initial load duke parents: diff changeset	219 virtual bool do_object_b(oop obj) = 0;
a61af66fc99e Initial load duke parents: diff changeset	220 };
a61af66fc99e Initial load duke parents: diff changeset	221
a61af66fc99e Initial load duke parents: diff changeset	222 // Applies an oop closure to all ref fields in objects iterated over in an
a61af66fc99e Initial load duke parents: diff changeset	223 // object iteration.
a61af66fc99e Initial load duke parents: diff changeset	224 class ObjectToOopClosure: public ObjectClosure {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	225 ExtendedOopClosure* _cl;
0 a61af66fc99e Initial load duke parents: diff changeset	226 public:
a61af66fc99e Initial load duke parents: diff changeset	227 void do_object(oop obj);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	228 ObjectToOopClosure(ExtendedOopClosure* cl) : _cl(cl) {}
0 a61af66fc99e Initial load duke parents: diff changeset	229 };
a61af66fc99e Initial load duke parents: diff changeset	230
a61af66fc99e Initial load duke parents: diff changeset	231 // A version of ObjectClosure that is expected to be robust
a61af66fc99e Initial load duke parents: diff changeset	232 // in the face of possibly uninitialized objects.
a61af66fc99e Initial load duke parents: diff changeset	233 class ObjectClosureCareful : public ObjectClosure {
a61af66fc99e Initial load duke parents: diff changeset	234 public:
a61af66fc99e Initial load duke parents: diff changeset	235 virtual size_t do_object_careful_m(oop p, MemRegion mr) = 0;
a61af66fc99e Initial load duke parents: diff changeset	236 virtual size_t do_object_careful(oop p) = 0;
a61af66fc99e Initial load duke parents: diff changeset	237 };
a61af66fc99e Initial load duke parents: diff changeset	238
a61af66fc99e Initial load duke parents: diff changeset	239 // The following are used in CompactibleFreeListSpace and
a61af66fc99e Initial load duke parents: diff changeset	240 // ConcurrentMarkSweepGeneration.
a61af66fc99e Initial load duke parents: diff changeset	241
a61af66fc99e Initial load duke parents: diff changeset	242 // Blk closure (abstract class)
a61af66fc99e Initial load duke parents: diff changeset	243 class BlkClosure : public StackObj {
a61af66fc99e Initial load duke parents: diff changeset	244 public:
a61af66fc99e Initial load duke parents: diff changeset	245 virtual size_t do_blk(HeapWord* addr) = 0;
a61af66fc99e Initial load duke parents: diff changeset	246 };
a61af66fc99e Initial load duke parents: diff changeset	247
a61af66fc99e Initial load duke parents: diff changeset	248 // A version of BlkClosure that is expected to be robust
a61af66fc99e Initial load duke parents: diff changeset	249 // in the face of possibly uninitialized objects.
a61af66fc99e Initial load duke parents: diff changeset	250 class BlkClosureCareful : public BlkClosure {
a61af66fc99e Initial load duke parents: diff changeset	251 public:
a61af66fc99e Initial load duke parents: diff changeset	252 size_t do_blk(HeapWord* addr) {
a61af66fc99e Initial load duke parents: diff changeset	253 guarantee(false, "call do_blk_careful instead");
a61af66fc99e Initial load duke parents: diff changeset	254 return 0;
a61af66fc99e Initial load duke parents: diff changeset	255 }
a61af66fc99e Initial load duke parents: diff changeset	256 virtual size_t do_blk_careful(HeapWord* addr) = 0;
a61af66fc99e Initial load duke parents: diff changeset	257 };
a61af66fc99e Initial load duke parents: diff changeset	258
a61af66fc99e Initial load duke parents: diff changeset	259 // SpaceClosure is used for iterating over spaces
a61af66fc99e Initial load duke parents: diff changeset	260
a61af66fc99e Initial load duke parents: diff changeset	261 class Space;
a61af66fc99e Initial load duke parents: diff changeset	262 class CompactibleSpace;
a61af66fc99e Initial load duke parents: diff changeset	263
a61af66fc99e Initial load duke parents: diff changeset	264 class SpaceClosure : public StackObj {
a61af66fc99e Initial load duke parents: diff changeset	265 public:
a61af66fc99e Initial load duke parents: diff changeset	266 // Called for each space
a61af66fc99e Initial load duke parents: diff changeset	267 virtual void do_space(Space* s) = 0;
a61af66fc99e Initial load duke parents: diff changeset	268 };
a61af66fc99e Initial load duke parents: diff changeset	269
a61af66fc99e Initial load duke parents: diff changeset	270 class CompactibleSpaceClosure : public StackObj {
a61af66fc99e Initial load duke parents: diff changeset	271 public:
a61af66fc99e Initial load duke parents: diff changeset	272 // Called for each compactible space
a61af66fc99e Initial load duke parents: diff changeset	273 virtual void do_space(CompactibleSpace* s) = 0;
a61af66fc99e Initial load duke parents: diff changeset	274 };
a61af66fc99e Initial load duke parents: diff changeset	275
a61af66fc99e Initial load duke parents: diff changeset	276
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	277 // CodeBlobClosure is used for iterating through code blobs
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	278 // in the code cache or on thread stacks
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	279
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	280 class CodeBlobClosure : public Closure {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	281 public:
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	282 // Called for each code blob.
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	283 virtual void do_code_blob(CodeBlob* cb) = 0;
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	284 };
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	285
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	286 // Applies an oop closure to all ref fields in code blobs
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	287 // iterated over in an object iteration.
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	288 class CodeBlobToOopClosure : public CodeBlobClosure {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	289 OopClosure* _cl;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	290 bool _fix_relocations;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	291 protected:
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	292 void do_nmethod(nmethod* nm);
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	293 public:
20278 2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	294 CodeBlobToOopClosure(OopClosure* cl, bool fix_relocations) : _cl(cl), _fix_relocations(fix_relocations) {}
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	295 virtual void do_code_blob(CodeBlob* cb);
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	296
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	297 const static bool FixRelocations = true;
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	298 };
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	299
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	300 class MarkingCodeBlobClosure : public CodeBlobToOopClosure {
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	301 public:
2c6ef90f030a 8049421: G1 Class Unloading after completing a concurrent mark cycle stefank parents: 20268 diff changeset	302 MarkingCodeBlobClosure(OopClosure* cl, bool fix_relocations) : CodeBlobToOopClosure(cl, fix_relocations) {}
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	303 // Called for each code blob, but at most once per unique blob.
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	304
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	305 virtual void do_code_blob(CodeBlob* cb);
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	306
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	307 class MarkScope : public StackObj {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	308 protected:
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	309 bool _active;
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	310 public:
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	311 MarkScope(bool activate = true);
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	312 // = { if (active) nmethod::oops_do_marking_prologue(); }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	313 ~MarkScope();
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	314 // = { if (active) nmethod::oops_do_marking_epilogue(); }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	315 };
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	316 };
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	317
0 a61af66fc99e Initial load duke parents: diff changeset	318 // MonitorClosure is used for iterating over monitors in the monitors cache
a61af66fc99e Initial load duke parents: diff changeset	319
a61af66fc99e Initial load duke parents: diff changeset	320 class ObjectMonitor;
a61af66fc99e Initial load duke parents: diff changeset	321
a61af66fc99e Initial load duke parents: diff changeset	322 class MonitorClosure : public StackObj {
a61af66fc99e Initial load duke parents: diff changeset	323 public:
a61af66fc99e Initial load duke parents: diff changeset	324 // called for each monitor in cache
a61af66fc99e Initial load duke parents: diff changeset	325 virtual void do_monitor(ObjectMonitor* m) = 0;
a61af66fc99e Initial load duke parents: diff changeset	326 };
a61af66fc99e Initial load duke parents: diff changeset	327
a61af66fc99e Initial load duke parents: diff changeset	328 // A closure that is applied without any arguments.
a61af66fc99e Initial load duke parents: diff changeset	329 class VoidClosure : public StackObj {
a61af66fc99e Initial load duke parents: diff changeset	330 public:
a61af66fc99e Initial load duke parents: diff changeset	331 // I would have liked to declare this a pure virtual, but that breaks
a61af66fc99e Initial load duke parents: diff changeset	332 // in mysterious ways, for unknown reasons.
a61af66fc99e Initial load duke parents: diff changeset	333 virtual void do_void();
a61af66fc99e Initial load duke parents: diff changeset	334 };
a61af66fc99e Initial load duke parents: diff changeset	335
a61af66fc99e Initial load duke parents: diff changeset	336
a61af66fc99e Initial load duke parents: diff changeset	337 // YieldClosure is intended for use by iteration loops
a61af66fc99e Initial load duke parents: diff changeset	338 // to incrementalize their work, allowing interleaving
a61af66fc99e Initial load duke parents: diff changeset	339 // of an interruptable task so as to allow other
a61af66fc99e Initial load duke parents: diff changeset	340 // threads to run (which may not otherwise be able to access
a61af66fc99e Initial load duke parents: diff changeset	341 // exclusive resources, for instance). Additionally, the
a61af66fc99e Initial load duke parents: diff changeset	342 // closure also allows for aborting an ongoing iteration
a61af66fc99e Initial load duke parents: diff changeset	343 // by means of checking the return value from the polling
a61af66fc99e Initial load duke parents: diff changeset	344 // call.
a61af66fc99e Initial load duke parents: diff changeset	345 class YieldClosure : public StackObj {
a61af66fc99e Initial load duke parents: diff changeset	346 public:
a61af66fc99e Initial load duke parents: diff changeset	347 virtual bool should_return() = 0;
a61af66fc99e Initial load duke parents: diff changeset	348 };
a61af66fc99e Initial load duke parents: diff changeset	349
a61af66fc99e Initial load duke parents: diff changeset	350 // Abstract closure for serializing data (read or write).
a61af66fc99e Initial load duke parents: diff changeset	351
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	352 class SerializeClosure : public Closure {
0 a61af66fc99e Initial load duke parents: diff changeset	353 public:
a61af66fc99e Initial load duke parents: diff changeset	354 // Return bool indicating whether closure implements read or write.
a61af66fc99e Initial load duke parents: diff changeset	355 virtual bool reading() const = 0;
a61af66fc99e Initial load duke parents: diff changeset	356
a61af66fc99e Initial load duke parents: diff changeset	357 // Read/write the void pointer pointed to by p.
a61af66fc99e Initial load duke parents: diff changeset	358 virtual void do_ptr(void** p) = 0;
a61af66fc99e Initial load duke parents: diff changeset	359
a61af66fc99e Initial load duke parents: diff changeset	360 // Read/write the region specified.
a61af66fc99e Initial load duke parents: diff changeset	361 virtual void do_region(u_char* start, size_t size) = 0;
a61af66fc99e Initial load duke parents: diff changeset	362
a61af66fc99e Initial load duke parents: diff changeset	363 // Check/write the tag. If reading, then compare the tag against
a61af66fc99e Initial load duke parents: diff changeset	364 // the passed in value and fail is they don't match. This allows
a61af66fc99e Initial load duke parents: diff changeset	365 // for verification that sections of the serialized data are of the
a61af66fc99e Initial load duke parents: diff changeset	366 // correct length.
a61af66fc99e Initial load duke parents: diff changeset	367 virtual void do_tag(int tag) = 0;
a61af66fc99e Initial load duke parents: diff changeset	368 };
935 05f89f00a864 6798898: CMS: bugs related to class unloading jmasa parents: 356 diff changeset	369
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	370 class SymbolClosure : public StackObj {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	371 public:
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	372 virtual void do_symbol(Symbol**) = 0;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	373
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	374 // Clear LSB in symbol address; it can be set by CPSlot.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	375 static Symbol* load_symbol(Symbol** p) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	376 return (Symbol)(intptr_t(p) & ~1);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	377 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	378
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	379 // Store symbol, adjusting new pointer if the original pointer was adjusted
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	380 // (symbol references in constant pool slots have their LSB set to 1).
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	381 static void store_symbol(Symbol** p, Symbol* sym) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	382 p = (Symbol)(intptr_t(sym) \| (intptr_t(*p) & 1));
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	383 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	384 };
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	385
20268 4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	386
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	387 // Helper defines for ExtendOopClosure
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	388
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	389 #define if_do_metadata_checked(closure, nv_suffix) \
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	390 /* Make sure the non-virtual and the virtual versions match. */ \
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	391 assert(closure->do_metadata##nv_suffix() == closure->do_metadata(), \
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	392 "Inconsistency in do_metadata"); \
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	393 if (closure->do_metadata##nv_suffix())
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	394
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	395 #define assert_should_ignore_metadata(closure, nv_suffix) \
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	396 assert(!closure->do_metadata##nv_suffix(), "Code to handle metadata is not implemented")
4c1b88a53c74 8046670: Make CMS metadata aware closures applicable for other collectors stefank parents: 20265 diff changeset	397
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	398 #endif // SHARE_VM_MEMORY_ITERATOR_HPP

Mercurial > hg > truffle

annotate src/share/vm/memory/iterator.hpp @ 20804:7848fc12602b