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

annotate src/share/vm/memory/iterator.hpp @ 6725:da91efe96a93

6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>

author	coleenp
date	Sat, 01 Sep 2012 13:25:18 -0400
parents	1d1603768966
children	ec98e58952b2

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	2 * Copyright (c) 1997, 2012, 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
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	87 // ExtendedOopClosures that don't need to walk the metadata. Currently,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	88 // only CMS needs 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
a61af66fc99e Initial load duke parents: diff changeset	131 // ObjectClosure is used for iterating through an object space
a61af66fc99e Initial load duke parents: diff changeset	132
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 113 diff changeset	133 class ObjectClosure : public Closure {
0 a61af66fc99e Initial load duke parents: diff changeset	134 public:
a61af66fc99e Initial load duke parents: diff changeset	135 // Called for each object.
a61af66fc99e Initial load duke parents: diff changeset	136 virtual void do_object(oop obj) = 0;
a61af66fc99e Initial load duke parents: diff changeset	137 };
a61af66fc99e Initial load duke parents: diff changeset	138
a61af66fc99e Initial load duke parents: diff changeset	139
a61af66fc99e Initial load duke parents: diff changeset	140 class BoolObjectClosure : public ObjectClosure {
a61af66fc99e Initial load duke parents: diff changeset	141 public:
a61af66fc99e Initial load duke parents: diff changeset	142 virtual bool do_object_b(oop obj) = 0;
a61af66fc99e Initial load duke parents: diff changeset	143 };
a61af66fc99e Initial load duke parents: diff changeset	144
a61af66fc99e Initial load duke parents: diff changeset	145 // Applies an oop closure to all ref fields in objects iterated over in an
a61af66fc99e Initial load duke parents: diff changeset	146 // object iteration.
a61af66fc99e Initial load duke parents: diff changeset	147 class ObjectToOopClosure: public ObjectClosure {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	148 ExtendedOopClosure* _cl;
0 a61af66fc99e Initial load duke parents: diff changeset	149 public:
a61af66fc99e Initial load duke parents: diff changeset	150 void do_object(oop obj);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	151 ObjectToOopClosure(ExtendedOopClosure* cl) : _cl(cl) {}
0 a61af66fc99e Initial load duke parents: diff changeset	152 };
a61af66fc99e Initial load duke parents: diff changeset	153
a61af66fc99e Initial load duke parents: diff changeset	154 // A version of ObjectClosure with "memory" (see _previous_address below)
a61af66fc99e Initial load duke parents: diff changeset	155 class UpwardsObjectClosure: public BoolObjectClosure {
a61af66fc99e Initial load duke parents: diff changeset	156 HeapWord* _previous_address;
a61af66fc99e Initial load duke parents: diff changeset	157 public:
a61af66fc99e Initial load duke parents: diff changeset	158 UpwardsObjectClosure() : _previous_address(NULL) { }
a61af66fc99e Initial load duke parents: diff changeset	159 void set_previous(HeapWord* addr) { _previous_address = addr; }
a61af66fc99e Initial load duke parents: diff changeset	160 HeapWord* previous() { return _previous_address; }
a61af66fc99e Initial load duke parents: diff changeset	161 // A return value of "true" can be used by the caller to decide
a61af66fc99e Initial load duke parents: diff changeset	162 // if this object's end should NOT be recorded in
a61af66fc99e Initial load duke parents: diff changeset	163 // _previous_address above.
a61af66fc99e Initial load duke parents: diff changeset	164 virtual bool do_object_bm(oop obj, MemRegion mr) = 0;
a61af66fc99e Initial load duke parents: diff changeset	165 };
a61af66fc99e Initial load duke parents: diff changeset	166
a61af66fc99e Initial load duke parents: diff changeset	167 // A version of ObjectClosure that is expected to be robust
a61af66fc99e Initial load duke parents: diff changeset	168 // in the face of possibly uninitialized objects.
a61af66fc99e Initial load duke parents: diff changeset	169 class ObjectClosureCareful : public ObjectClosure {
a61af66fc99e Initial load duke parents: diff changeset	170 public:
a61af66fc99e Initial load duke parents: diff changeset	171 virtual size_t do_object_careful_m(oop p, MemRegion mr) = 0;
a61af66fc99e Initial load duke parents: diff changeset	172 virtual size_t do_object_careful(oop p) = 0;
a61af66fc99e Initial load duke parents: diff changeset	173 };
a61af66fc99e Initial load duke parents: diff changeset	174
a61af66fc99e Initial load duke parents: diff changeset	175 // The following are used in CompactibleFreeListSpace and
a61af66fc99e Initial load duke parents: diff changeset	176 // ConcurrentMarkSweepGeneration.
a61af66fc99e Initial load duke parents: diff changeset	177
a61af66fc99e Initial load duke parents: diff changeset	178 // Blk closure (abstract class)
a61af66fc99e Initial load duke parents: diff changeset	179 class BlkClosure : public StackObj {
a61af66fc99e Initial load duke parents: diff changeset	180 public:
a61af66fc99e Initial load duke parents: diff changeset	181 virtual size_t do_blk(HeapWord* addr) = 0;
a61af66fc99e Initial load duke parents: diff changeset	182 };
a61af66fc99e Initial load duke parents: diff changeset	183
a61af66fc99e Initial load duke parents: diff changeset	184 // A version of BlkClosure that is expected to be robust
a61af66fc99e Initial load duke parents: diff changeset	185 // in the face of possibly uninitialized objects.
a61af66fc99e Initial load duke parents: diff changeset	186 class BlkClosureCareful : public BlkClosure {
a61af66fc99e Initial load duke parents: diff changeset	187 public:
a61af66fc99e Initial load duke parents: diff changeset	188 size_t do_blk(HeapWord* addr) {
a61af66fc99e Initial load duke parents: diff changeset	189 guarantee(false, "call do_blk_careful instead");
a61af66fc99e Initial load duke parents: diff changeset	190 return 0;
a61af66fc99e Initial load duke parents: diff changeset	191 }
a61af66fc99e Initial load duke parents: diff changeset	192 virtual size_t do_blk_careful(HeapWord* addr) = 0;
a61af66fc99e Initial load duke parents: diff changeset	193 };
a61af66fc99e Initial load duke parents: diff changeset	194
a61af66fc99e Initial load duke parents: diff changeset	195 // SpaceClosure is used for iterating over spaces
a61af66fc99e Initial load duke parents: diff changeset	196
a61af66fc99e Initial load duke parents: diff changeset	197 class Space;
a61af66fc99e Initial load duke parents: diff changeset	198 class CompactibleSpace;
a61af66fc99e Initial load duke parents: diff changeset	199
a61af66fc99e Initial load duke parents: diff changeset	200 class SpaceClosure : public StackObj {
a61af66fc99e Initial load duke parents: diff changeset	201 public:
a61af66fc99e Initial load duke parents: diff changeset	202 // Called for each space
a61af66fc99e Initial load duke parents: diff changeset	203 virtual void do_space(Space* s) = 0;
a61af66fc99e Initial load duke parents: diff changeset	204 };
a61af66fc99e Initial load duke parents: diff changeset	205
a61af66fc99e Initial load duke parents: diff changeset	206 class CompactibleSpaceClosure : public StackObj {
a61af66fc99e Initial load duke parents: diff changeset	207 public:
a61af66fc99e Initial load duke parents: diff changeset	208 // Called for each compactible space
a61af66fc99e Initial load duke parents: diff changeset	209 virtual void do_space(CompactibleSpace* s) = 0;
a61af66fc99e Initial load duke parents: diff changeset	210 };
a61af66fc99e Initial load duke parents: diff changeset	211
a61af66fc99e Initial load duke parents: diff changeset	212
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	213 // 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	214 // 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	215
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	216 class CodeBlobClosure : public Closure {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	217 public:
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	218 // Called for each code blob.
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	219 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	220 };
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	221
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	222
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	223 class MarkingCodeBlobClosure : public CodeBlobClosure {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	224 public:
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	225 // Called for each code blob, but at most once per unique blob.
994 753cf9794df9 6885169: merge of 4957990 and 6863023 causes conflict on do_nmethods jrose parents: 993 diff changeset	226 virtual void do_newly_marked_nmethod(nmethod* nm) = 0;
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	227
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	228 virtual void do_code_blob(CodeBlob* cb);
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	229 // = { if (!nmethod(cb)->test_set_oops_do_mark()) do_newly_marked_nmethod(cb); }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	230
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	231 class MarkScope : public StackObj {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	232 protected:
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	233 bool _active;
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	234 public:
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	235 MarkScope(bool activate = true);
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	236 // = { if (active) nmethod::oops_do_marking_prologue(); }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	237 ~MarkScope();
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	238 // = { if (active) nmethod::oops_do_marking_epilogue(); }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	239 };
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	240 };
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	241
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	242
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	243 // Applies an oop closure to all ref fields in code blobs
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	244 // iterated over in an object iteration.
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	245 class CodeBlobToOopClosure: public MarkingCodeBlobClosure {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	246 OopClosure* _cl;
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	247 bool _do_marking;
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	248 public:
994 753cf9794df9 6885169: merge of 4957990 and 6863023 causes conflict on do_nmethods jrose parents: 993 diff changeset	249 virtual void do_newly_marked_nmethod(nmethod* cb);
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	250 // = { cb->oops_do(_cl); }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	251 virtual void do_code_blob(CodeBlob* cb);
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	252 // = { if (_do_marking) super::do_code_blob(cb); else cb->oops_do(_cl); }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	253 CodeBlobToOopClosure(OopClosure* cl, bool do_marking)
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	254 : _cl(cl), _do_marking(do_marking) {}
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	255 };
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	256
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 356 diff changeset	257
0 a61af66fc99e Initial load duke parents: diff changeset	258
a61af66fc99e Initial load duke parents: diff changeset	259 // MonitorClosure is used for iterating over monitors in the monitors cache
a61af66fc99e Initial load duke parents: diff changeset	260
a61af66fc99e Initial load duke parents: diff changeset	261 class ObjectMonitor;
a61af66fc99e Initial load duke parents: diff changeset	262
a61af66fc99e Initial load duke parents: diff changeset	263 class MonitorClosure : public StackObj {
a61af66fc99e Initial load duke parents: diff changeset	264 public:
a61af66fc99e Initial load duke parents: diff changeset	265 // called for each monitor in cache
a61af66fc99e Initial load duke parents: diff changeset	266 virtual void do_monitor(ObjectMonitor* m) = 0;
a61af66fc99e Initial load duke parents: diff changeset	267 };
a61af66fc99e Initial load duke parents: diff changeset	268
a61af66fc99e Initial load duke parents: diff changeset	269 // A closure that is applied without any arguments.
a61af66fc99e Initial load duke parents: diff changeset	270 class VoidClosure : public StackObj {
a61af66fc99e Initial load duke parents: diff changeset	271 public:
a61af66fc99e Initial load duke parents: diff changeset	272 // I would have liked to declare this a pure virtual, but that breaks
a61af66fc99e Initial load duke parents: diff changeset	273 // in mysterious ways, for unknown reasons.
a61af66fc99e Initial load duke parents: diff changeset	274 virtual void do_void();
a61af66fc99e Initial load duke parents: diff changeset	275 };
a61af66fc99e Initial load duke parents: diff changeset	276
a61af66fc99e Initial load duke parents: diff changeset	277
a61af66fc99e Initial load duke parents: diff changeset	278 // YieldClosure is intended for use by iteration loops
a61af66fc99e Initial load duke parents: diff changeset	279 // to incrementalize their work, allowing interleaving
a61af66fc99e Initial load duke parents: diff changeset	280 // of an interruptable task so as to allow other
a61af66fc99e Initial load duke parents: diff changeset	281 // threads to run (which may not otherwise be able to access
a61af66fc99e Initial load duke parents: diff changeset	282 // exclusive resources, for instance). Additionally, the
a61af66fc99e Initial load duke parents: diff changeset	283 // closure also allows for aborting an ongoing iteration
a61af66fc99e Initial load duke parents: diff changeset	284 // by means of checking the return value from the polling
a61af66fc99e Initial load duke parents: diff changeset	285 // call.
a61af66fc99e Initial load duke parents: diff changeset	286 class YieldClosure : public StackObj {
a61af66fc99e Initial load duke parents: diff changeset	287 public:
a61af66fc99e Initial load duke parents: diff changeset	288 virtual bool should_return() = 0;
a61af66fc99e Initial load duke parents: diff changeset	289 };
a61af66fc99e Initial load duke parents: diff changeset	290
a61af66fc99e Initial load duke parents: diff changeset	291 // Abstract closure for serializing data (read or write).
a61af66fc99e Initial load duke parents: diff changeset	292
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 2426 diff changeset	293 class SerializeClosure : public Closure {
0 a61af66fc99e Initial load duke parents: diff changeset	294 public:
a61af66fc99e Initial load duke parents: diff changeset	295 // Return bool indicating whether closure implements read or write.
a61af66fc99e Initial load duke parents: diff changeset	296 virtual bool reading() const = 0;
a61af66fc99e Initial load duke parents: diff changeset	297
a61af66fc99e Initial load duke parents: diff changeset	298 // Read/write the void pointer pointed to by p.
a61af66fc99e Initial load duke parents: diff changeset	299 virtual void do_ptr(void** p) = 0;
a61af66fc99e Initial load duke parents: diff changeset	300
a61af66fc99e Initial load duke parents: diff changeset	301 // Read/write the region specified.
a61af66fc99e Initial load duke parents: diff changeset	302 virtual void do_region(u_char* start, size_t size) = 0;
a61af66fc99e Initial load duke parents: diff changeset	303
a61af66fc99e Initial load duke parents: diff changeset	304 // Check/write the tag. If reading, then compare the tag against
a61af66fc99e Initial load duke parents: diff changeset	305 // the passed in value and fail is they don't match. This allows
a61af66fc99e Initial load duke parents: diff changeset	306 // for verification that sections of the serialized data are of the
a61af66fc99e Initial load duke parents: diff changeset	307 // correct length.
a61af66fc99e Initial load duke parents: diff changeset	308 virtual void do_tag(int tag) = 0;
a61af66fc99e Initial load duke parents: diff changeset	309 };
935 05f89f00a864 6798898: CMS: bugs related to class unloading jmasa parents: 356 diff changeset	310
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	311 class SymbolClosure : public StackObj {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	312 public:
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	313 virtual void do_symbol(Symbol**) = 0;
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	314
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	315 // 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	316 static Symbol* load_symbol(Symbol** p) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	317 return (Symbol)(intptr_t(p) & ~1);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	318 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	319
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	320 // 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	321 // (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	322 static void store_symbol(Symbol** p, Symbol* sym) {
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	323 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	324 }
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	325 };
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	326
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	327 #endif // SHARE_VM_MEMORY_ITERATOR_HPP

Mercurial > hg > truffle

annotate src/share/vm/memory/iterator.hpp @ 6725:da91efe96a93