truffle: src/share/vm/classfile/classLoaderData.hpp annotate

annotate src/share/vm/classfile/classLoaderData.hpp @ 17935:7384f6a12fc1

8038212: Method::is_valid_method() check has performance regression impact for stackwalking Summary: Only prune metaspace virtual spaces at safepoint so walking them is safe outside a safepoint. Reviewed-by: mgerdin, mgronlun, hseigel, stefank

author	coleenp
date	Thu, 15 May 2014 18:23:26 -0400
parents	85318d1fe8fe
children	e4a6e7f1b90b

rev	line source
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	1 /*
17674 85318d1fe8fe 8027146: Class loading verification failure if GC occurs in Universe::flush_dependents_on coleenp parents: 17663 diff changeset	2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	4 *
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	7 * published by the Free Software Foundation.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	8 *
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
7440 79f492f184d0 8004982: JDK8 source with GPL header errors katleman parents: 7185 diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	13 * accompanied this code).
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	14 *
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	18 *
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	20 * or visit www.oracle.com if you need additional information or have any
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	21 * questions.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	22 *
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	23 */
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	24
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	25 #ifndef SHARE_VM_CLASSFILE_CLASSLOADERDATA_HPP
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	26 #define SHARE_VM_CLASSFILE_CLASSLOADERDATA_HPP
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	27
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	28 #include "memory/allocation.hpp"
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	29 #include "memory/memRegion.hpp"
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	30 #include "memory/metaspace.hpp"
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	31 #include "memory/metaspaceCounters.hpp"
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	32 #include "runtime/mutex.hpp"
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	33 #include "utilities/growableArray.hpp"
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	34
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10184 diff changeset	35 #if INCLUDE_TRACE
13400 86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data mgronlun parents: 12995 diff changeset	36 # include "utilities/ticks.hpp"
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10184 diff changeset	37 #endif
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10184 diff changeset	38
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	39 //
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	40 // A class loader represents a linkset. Conceptually, a linkset identifies
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	41 // the complete transitive closure of resolved links that a dynamic linker can
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	42 // produce.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	43 //
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	44 // A ClassLoaderData also encapsulates the allocation space, called a metaspace,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	45 // used by the dynamic linker to allocate the runtime representation of all
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	46 // the types it defines.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	47 //
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	48 // ClassLoaderData are stored in the runtime representation of classes and the
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	49 // system dictionary, are roots of garbage collection, and provides iterators
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	50 // for root tracing and other GC operations.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	51
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	52 class ClassLoaderData;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	53 class JNIMethodBlock;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	54 class JNIHandleBlock;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	55 class Metadebug;
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10184 diff changeset	56
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	57 // GC root for walking class loader data created
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	58
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	59 class ClassLoaderDataGraph : public AllStatic {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	60 friend class ClassLoaderData;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	61 friend class ClassLoaderDataGraphMetaspaceIterator;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	62 friend class VMStructs;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	63 private:
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	64 // All CLDs (except the null CLD) can be reached by walking _head->_next->...
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	65 static ClassLoaderData* _head;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	66 static ClassLoaderData* _unloading;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	67 // CMS support.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	68 static ClassLoaderData* _saved_head;
17935 7384f6a12fc1 8038212: Method::is_valid_method() check has performance regression impact for stackwalking coleenp parents: 17674 diff changeset	69 static bool _should_purge;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	70
10181 1cb4795305b9 8011802: NPG: init_dependencies in class loader data graph can cause invalid CLD mgerdin parents: 9075 diff changeset	71 static ClassLoaderData* add(Handle class_loader, bool anonymous, TRAPS);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10184 diff changeset	72 static void post_class_unload_events(void);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	73 public:
7185 90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap coleenp parents: 6757 diff changeset	74 static ClassLoaderData* find_or_create(Handle class_loader, TRAPS);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	75 static void purge();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	76 static void clear_claimed_marks();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	77 static void oops_do(OopClosure* f, KlassClosure* klass_closure, bool must_claim);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	78 static void always_strong_oops_do(OopClosure* blk, KlassClosure* klass_closure, bool must_claim);
7185 90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap coleenp parents: 6757 diff changeset	79 static void keep_alive_oops_do(OopClosure* blk, KlassClosure* klass_closure, bool must_claim);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	80 static void classes_do(KlassClosure* klass_closure);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10184 diff changeset	81 static void classes_do(void f(Klass* const));
12995 e64f1fe9756b 8024423: JVMTI: GetLoadedClasses doesn't enumerate anonymous classes farvidsson parents: 10405 diff changeset	82 static void loaded_classes_do(KlassClosure* klass_closure);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10184 diff changeset	83 static void classes_unloading_do(void f(Klass* const));
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	84 static bool do_unloading(BoolObjectClosure* is_alive);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	85
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	86 // CMS support.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	87 static void remember_new_clds(bool remember) { _saved_head = (remember ? _head : NULL); }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	88 static GrowableArray<ClassLoaderData> new_clds();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	89
17935 7384f6a12fc1 8038212: Method::is_valid_method() check has performance regression impact for stackwalking coleenp parents: 17674 diff changeset	90 static void set_should_purge(bool b) { _should_purge = b; }
7384f6a12fc1 8038212: Method::is_valid_method() check has performance regression impact for stackwalking coleenp parents: 17674 diff changeset	91 static void purge_if_needed() {
7384f6a12fc1 8038212: Method::is_valid_method() check has performance regression impact for stackwalking coleenp parents: 17674 diff changeset	92 // Only purge the CLDG for CMS if concurrent sweep is complete.
7384f6a12fc1 8038212: Method::is_valid_method() check has performance regression impact for stackwalking coleenp parents: 17674 diff changeset	93 if (_should_purge) {
7384f6a12fc1 8038212: Method::is_valid_method() check has performance regression impact for stackwalking coleenp parents: 17674 diff changeset	94 purge();
7384f6a12fc1 8038212: Method::is_valid_method() check has performance regression impact for stackwalking coleenp parents: 17674 diff changeset	95 // reset for next time.
7384f6a12fc1 8038212: Method::is_valid_method() check has performance regression impact for stackwalking coleenp parents: 17674 diff changeset	96 set_should_purge(false);
7384f6a12fc1 8038212: Method::is_valid_method() check has performance regression impact for stackwalking coleenp parents: 17674 diff changeset	97 }
7384f6a12fc1 8038212: Method::is_valid_method() check has performance regression impact for stackwalking coleenp parents: 17674 diff changeset	98 }
7384f6a12fc1 8038212: Method::is_valid_method() check has performance regression impact for stackwalking coleenp parents: 17674 diff changeset	99
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	100 static void dump_on(outputStream * const out) PRODUCT_RETURN;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	101 static void dump() { dump_on(tty); }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	102 static void verify();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	103
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	104 #ifndef PRODUCT
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	105 static bool contains_loader_data(ClassLoaderData* loader_data);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	106 #endif
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10184 diff changeset	107
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10184 diff changeset	108 #if INCLUDE_TRACE
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10184 diff changeset	109 private:
13400 86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data mgronlun parents: 12995 diff changeset	110 static Ticks _class_unload_time;
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10184 diff changeset	111 static void class_unload_event(Klass* const k);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10184 diff changeset	112 #endif
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	113 };
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	114
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	115 // ClassLoaderData class
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	116
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	117 class ClassLoaderData : public CHeapObj<mtClass> {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	118 friend class VMStructs;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	119 private:
9075 ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	120 class Dependencies VALUE_OBJ_CLASS_SPEC {
ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	121 objArrayOop _list_head;
ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	122 void locked_add(objArrayHandle last,
ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	123 objArrayHandle new_dependency,
ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	124 Thread* THREAD);
ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	125 public:
ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	126 Dependencies() : _list_head(NULL) {}
10184 9d75bcd7c890 8013136: NPG: Parallel class loading tests fail after fix for JDK-8011802 mgerdin parents: 10181 diff changeset	127 Dependencies(TRAPS) : _list_head(NULL) {
9d75bcd7c890 8013136: NPG: Parallel class loading tests fail after fix for JDK-8011802 mgerdin parents: 10181 diff changeset	128 init(CHECK);
9d75bcd7c890 8013136: NPG: Parallel class loading tests fail after fix for JDK-8011802 mgerdin parents: 10181 diff changeset	129 }
9075 ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	130 void add(Handle dependency, TRAPS);
ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	131 void init(TRAPS);
ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	132 void oops_do(OopClosure* f);
ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	133 };
ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	134
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	135 friend class ClassLoaderDataGraph;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	136 friend class ClassLoaderDataGraphMetaspaceIterator;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	137 friend class MetaDataFactory;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	138 friend class Method;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	139
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	140 static ClassLoaderData * _the_null_class_loader_data;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	141
9075 ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	142 oop _class_loader; // oop used to uniquely identify a class loader
ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	143 // class loader or a canonical class path
ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	144 Dependencies _dependencies; // holds dependencies from this class loader
ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	145 // data to others.
ba42fd5e00e6 8010196: NPG: Internal Error: Metaspace allocation lock -- possible deadlock mgerdin parents: 8866 diff changeset	146
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	147 Metaspace * _metaspace; // Meta-space where meta-data defined by the
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	148 // classes in the class loader are allocated.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	149 Mutex* _metaspace_lock; // Locks the metaspace for allocations and setup.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	150 bool _unloading; // true if this class loader goes away
7185 90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap coleenp parents: 6757 diff changeset	151 bool _keep_alive; // if this CLD can be unloaded for anonymous loaders
7409 30866cd626b0 8004883: NPG: clean up anonymous class fix coleenp parents: 7185 diff changeset	152 bool _is_anonymous; // if this CLD is for an anonymous class
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	153 volatile int _claimed; // true if claimed, for example during GC traces.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	154 // To avoid applying oop closure more than once.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	155 // Has to be an int because we cas it.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	156 Klass* _klasses; // The classes defined by the class loader.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	157
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	158 JNIHandleBlock* _handles; // Handles to constant pool arrays
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	159
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	160 // These method IDs are created for the class loader and set to NULL when the
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	161 // class loader is unloaded. They are rarely freed, only for redefine classes
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	162 // and if they lose a data race in InstanceKlass.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	163 JNIMethodBlock* _jmethod_ids;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	164
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	165 // Metadata to be deallocated when it's safe at class unloading, when
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	166 // this class loader isn't unloaded itself.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	167 GrowableArray<Metadata> _deallocate_list;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	168
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	169 // Support for walking class loader data objects
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	170 ClassLoaderData* _next; /// Next loader_datas created
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	171
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	172 // ReadOnly and ReadWrite metaspaces (static because only on the null
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	173 // class loader for now).
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	174 static Metaspace* _ro_metaspace;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	175 static Metaspace* _rw_metaspace;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	176
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	177 void set_next(ClassLoaderData* next) { _next = next; }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	178 ClassLoaderData* next() const { return _next; }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	179
10184 9d75bcd7c890 8013136: NPG: Parallel class loading tests fail after fix for JDK-8011802 mgerdin parents: 10181 diff changeset	180 ClassLoaderData(Handle h_class_loader, bool is_anonymous, Dependencies dependencies);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	181 ~ClassLoaderData();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	182
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	183 void set_metaspace(Metaspace* m) { _metaspace = m; }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	184
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	185 JNIHandleBlock* handles() const;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	186 void set_handles(JNIHandleBlock* handles);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	187
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	188 Mutex* metaspace_lock() const { return _metaspace_lock; }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	189
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	190 // GC interface.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	191 void clear_claimed() { _claimed = 0; }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	192 bool claimed() const { return _claimed == 1; }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	193 bool claim();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	194
7185 90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap coleenp parents: 6757 diff changeset	195 void unload();
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap coleenp parents: 6757 diff changeset	196 bool keep_alive() const { return _keep_alive; }
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap coleenp parents: 6757 diff changeset	197 bool is_alive(BoolObjectClosure* is_alive_closure) const;
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10184 diff changeset	198 void classes_do(void f(Klass*));
12995 e64f1fe9756b 8024423: JVMTI: GetLoadedClasses doesn't enumerate anonymous classes farvidsson parents: 10405 diff changeset	199 void loaded_classes_do(KlassClosure* klass_closure);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	200 void classes_do(void f(InstanceKlass*));
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	201
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	202 // Deallocate free list during class unloading.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	203 void free_deallocate_list();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	204
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	205 // Allocate out of this class loader data
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	206 MetaWord* allocate(size_t size);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	207
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	208 public:
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	209 // Accessors
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	210 Metaspace* metaspace_or_null() const { return _metaspace; }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	211
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	212 static ClassLoaderData* the_null_class_loader_data() {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	213 return _the_null_class_loader_data;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	214 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	215
7409 30866cd626b0 8004883: NPG: clean up anonymous class fix coleenp parents: 7185 diff changeset	216 bool is_anonymous() const { return _is_anonymous; }
7185 90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap coleenp parents: 6757 diff changeset	217
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	218 static void init_null_class_loader_data() {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	219 assert(_the_null_class_loader_data == NULL, "cannot initialize twice");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	220 assert(ClassLoaderDataGraph::_head == NULL, "cannot initialize twice");
10184 9d75bcd7c890 8013136: NPG: Parallel class loading tests fail after fix for JDK-8011802 mgerdin parents: 10181 diff changeset	221
9d75bcd7c890 8013136: NPG: Parallel class loading tests fail after fix for JDK-8011802 mgerdin parents: 10181 diff changeset	222 // We explicitly initialize the Dependencies object at a later phase in the initialization
9d75bcd7c890 8013136: NPG: Parallel class loading tests fail after fix for JDK-8011802 mgerdin parents: 10181 diff changeset	223 _the_null_class_loader_data = new ClassLoaderData((oop)NULL, false, Dependencies());
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	224 ClassLoaderDataGraph::_head = _the_null_class_loader_data;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	225 assert(_the_null_class_loader_data->is_the_null_class_loader_data(), "Must be");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	226 if (DumpSharedSpaces) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	227 _the_null_class_loader_data->initialize_shared_metaspaces();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	228 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	229 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	230
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	231 bool is_the_null_class_loader_data() const {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	232 return this == _the_null_class_loader_data;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	233 }
8866 16885e702c88 7198429: need checked categorization of caller-sensitive methods in the JDK twisti parents: 8667 diff changeset	234 bool is_ext_class_loader_data() const;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	235
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	236 // The Metaspace is created lazily so may be NULL. This
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	237 // method will allocate a Metaspace if needed.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	238 Metaspace* metaspace_non_null();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	239
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	240 oop class_loader() const { return _class_loader; }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	241
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	242 // Returns true if this class loader data is for a loader going away.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	243 bool is_unloading() const {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	244 assert(!(is_the_null_class_loader_data() && _unloading), "The null class loader can never be unloaded");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	245 return _unloading;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	246 }
7185 90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap coleenp parents: 6757 diff changeset	247 // Anonymous class loader data doesn't have anything to keep them from
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap coleenp parents: 6757 diff changeset	248 // being unloaded during parsing the anonymous class.
90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap coleenp parents: 6757 diff changeset	249 void set_keep_alive(bool value) { _keep_alive = value; }
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	250
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	251 unsigned int identity_hash() {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	252 return _class_loader == NULL ? 0 : _class_loader->identity_hash();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	253 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	254
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	255 // Used when tracing from klasses.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	256 void oops_do(OopClosure* f, KlassClosure* klass_closure, bool must_claim);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	257
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	258 void classes_do(KlassClosure* klass_closure);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	259
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	260 JNIMethodBlock* jmethod_ids() const { return _jmethod_ids; }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	261 void set_jmethod_ids(JNIMethodBlock* new_block) { _jmethod_ids = new_block; }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	262
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	263 void print_value() { print_value_on(tty); }
7956 16fb9f942703 6479360: PrintClassHistogram improvements acorn parents: 7441 diff changeset	264 void print_value_on(outputStream* out) const;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	265 void dump(outputStream * const out) PRODUCT_RETURN;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	266 void verify();
7185 90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap coleenp parents: 6757 diff changeset	267 const char* loader_name();
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	268
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	269 jobject add_handle(Handle h);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	270 void add_class(Klass* k);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	271 void remove_class(Klass* k);
17674 85318d1fe8fe 8027146: Class loading verification failure if GC occurs in Universe::flush_dependents_on coleenp parents: 17663 diff changeset	272 bool contains_klass(Klass* k);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	273 void record_dependency(Klass* to, TRAPS);
7185 90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap coleenp parents: 6757 diff changeset	274 void init_dependencies(TRAPS);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	275
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	276 void add_to_deallocate_list(Metadata* m);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	277
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	278 static ClassLoaderData* class_loader_data(oop loader);
8667 1f9994892f89 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive stefank parents: 7956 diff changeset	279 static ClassLoaderData* class_loader_data_or_null(oop loader);
7185 90273fc0a981 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap coleenp parents: 6757 diff changeset	280 static ClassLoaderData* anonymous_class_loader_data(oop loader, TRAPS);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	281 static void print_loader(ClassLoaderData loader_data, outputStream out);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	282
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	283 // CDS support
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	284 Metaspace* ro_metaspace();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	285 Metaspace* rw_metaspace();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	286 void initialize_shared_metaspaces();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	287 };
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	288
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	289 class ClassLoaderDataGraphMetaspaceIterator : public StackObj {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	290 ClassLoaderData* _data;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	291 public:
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	292 ClassLoaderDataGraphMetaspaceIterator();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	293 ~ClassLoaderDataGraphMetaspaceIterator();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	294 bool repeat() { return _data != NULL; }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	295 Metaspace* get_next() {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	296 assert(_data != NULL, "Should not be NULL in call to the iterator");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	297 Metaspace* result = _data->metaspace_or_null();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	298 _data = _data->next();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	299 // This result might be NULL for class loaders without metaspace
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	300 // yet. It would be nice to return only non-null results but
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	301 // there is no guarantee that there will be a non-null result
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	302 // down the list so the caller is going to have to check.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	303 return result;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	304 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	305 };
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: diff changeset	306 #endif // SHARE_VM_CLASSFILE_CLASSLOADERDATA_HPP

Mercurial > hg > truffle

annotate src/share/vm/classfile/classLoaderData.hpp @ 17935:7384f6a12fc1