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comparison src/share/vm/runtime/jniHandles.cpp @ 6725:da91efe96a93

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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 f08d439fab8c
children f34d701e952e
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6724:36d1d483d5d6 6725:da91efe96a93
1 /* 1 /*
2 * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
109 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 109 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
110 } 110 }
111 return res; 111 return res;
112 } 112 }
113 113
114 jmethodID JNIHandles::make_jmethod_id(methodHandle mh) {
115 return (jmethodID) make_weak_global(mh);
116 }
117
118
119
120 void JNIHandles::change_method_associated_with_jmethod_id(jmethodID jmid, methodHandle mh) {
121 MutexLocker ml(JNIGlobalHandle_lock); // Is this necessary?
122 Handle obj = (Handle)mh;
123 oop* jobj = (oop*)jmid;
124 *jobj = obj();
125 }
126
127 114
128 void JNIHandles::destroy_global(jobject handle) { 115 void JNIHandles::destroy_global(jobject handle) {
129 if (handle != NULL) { 116 if (handle != NULL) {
130 assert(is_global_handle(handle), "Invalid delete of global JNI handle"); 117 assert(is_global_handle(handle), "Invalid delete of global JNI handle");
131 *((oop*)handle) = deleted_handle(); // Mark the handle as deleted, allocate will reuse it 118 *((oop*)handle) = deleted_handle(); // Mark the handle as deleted, allocate will reuse it
136 void JNIHandles::destroy_weak_global(jobject handle) { 123 void JNIHandles::destroy_weak_global(jobject handle) {
137 if (handle != NULL) { 124 if (handle != NULL) {
138 assert(!CheckJNICalls || is_weak_global_handle(handle), "Invalid delete of weak global JNI handle"); 125 assert(!CheckJNICalls || is_weak_global_handle(handle), "Invalid delete of weak global JNI handle");
139 *((oop*)handle) = deleted_handle(); // Mark the handle as deleted, allocate will reuse it 126 *((oop*)handle) = deleted_handle(); // Mark the handle as deleted, allocate will reuse it
140 } 127 }
141 }
142
143 void JNIHandles::destroy_jmethod_id(jmethodID mid) {
144 destroy_weak_global((jobject)mid);
145 } 128 }
146 129
147 130
148 void JNIHandles::oops_do(OopClosure* f) { 131 void JNIHandles::oops_do(OopClosure* f) {
149 f->do_oop(&_deleted_handle); 132 f->do_oop(&_deleted_handle);
160 _global_handles = JNIHandleBlock::allocate_block(); 143 _global_handles = JNIHandleBlock::allocate_block();
161 _weak_global_handles = JNIHandleBlock::allocate_block(); 144 _weak_global_handles = JNIHandleBlock::allocate_block();
162 EXCEPTION_MARK; 145 EXCEPTION_MARK;
163 // We will never reach the CATCH below since Exceptions::_throw will cause 146 // We will never reach the CATCH below since Exceptions::_throw will cause
164 // the VM to exit if an exception is thrown during initialization 147 // the VM to exit if an exception is thrown during initialization
165 klassOop k = SystemDictionary::Object_klass(); 148 Klass* k = SystemDictionary::Object_klass();
166 _deleted_handle = instanceKlass::cast(k)->allocate_permanent_instance(CATCH); 149 _deleted_handle = InstanceKlass::cast(k)->allocate_instance(CATCH);
167 } 150 }
168 151
169 152
170 bool JNIHandles::is_local_handle(Thread* thread, jobject handle) { 153 bool JNIHandles::is_local_handle(Thread* thread, jobject handle) {
171 JNIHandleBlock* block = thread->active_handles(); 154 JNIHandleBlock* block = thread->active_handles();