author | trims |
Thu, 27 May 2010 19:08:38 -0700 | |
changeset 5547 | f4b087cbb361 |
parent 1 | 489c9b5090e2 |
child 7397 | 5b173b4ca846 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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5547
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6941466: Oracle rebranding changes for Hotspot repositories
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changeset
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
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diff
changeset
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* or visit www.oracle.com if you need additional information or have any |
f4b087cbb361
6941466: Oracle rebranding changes for Hotspot repositories
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* questions. |
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* |
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*/ |
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# include "incls/_precompiled.incl" |
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# include "incls/_jvmtiGetLoadedClasses.cpp.incl" |
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// The closure for GetLoadedClasses and GetClassLoaderClasses |
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class JvmtiGetLoadedClassesClosure : public StackObj { |
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// Since the SystemDictionary::classes_do callback |
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// doesn't pass a closureData pointer, |
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// we use a thread-local slot to hold a pointer to |
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// a stack allocated instance of this structure. |
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private: |
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jobject _initiatingLoader; |
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int _count; |
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Handle* _list; |
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int _index; |
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private: |
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// Getting and setting the thread local pointer |
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static JvmtiGetLoadedClassesClosure* get_this() { |
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JvmtiGetLoadedClassesClosure* result = NULL; |
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JavaThread* thread = JavaThread::current(); |
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result = thread->get_jvmti_get_loaded_classes_closure(); |
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return result; |
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} |
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static void set_this(JvmtiGetLoadedClassesClosure* that) { |
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JavaThread* thread = JavaThread::current(); |
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thread->set_jvmti_get_loaded_classes_closure(that); |
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} |
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public: |
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// Constructor/Destructor |
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JvmtiGetLoadedClassesClosure() { |
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JvmtiGetLoadedClassesClosure* that = get_this(); |
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assert(that == NULL, "JvmtiGetLoadedClassesClosure in use"); |
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_initiatingLoader = NULL; |
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_count = 0; |
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_list = NULL; |
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_index = 0; |
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set_this(this); |
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} |
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JvmtiGetLoadedClassesClosure(jobject initiatingLoader) { |
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JvmtiGetLoadedClassesClosure* that = get_this(); |
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assert(that == NULL, "JvmtiGetLoadedClassesClosure in use"); |
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_initiatingLoader = initiatingLoader; |
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_count = 0; |
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_list = NULL; |
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_index = 0; |
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set_this(this); |
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} |
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~JvmtiGetLoadedClassesClosure() { |
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JvmtiGetLoadedClassesClosure* that = get_this(); |
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assert(that != NULL, "JvmtiGetLoadedClassesClosure not found"); |
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set_this(NULL); |
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_initiatingLoader = NULL; |
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_count = 0; |
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if (_list != NULL) { |
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FreeHeap(_list); |
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_list = NULL; |
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} |
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_index = 0; |
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} |
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// Accessors. |
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jobject get_initiatingLoader() { |
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return _initiatingLoader; |
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} |
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int get_count() { |
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return _count; |
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} |
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void set_count(int value) { |
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_count = value; |
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} |
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Handle* get_list() { |
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return _list; |
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} |
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void set_list(Handle* value) { |
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_list = value; |
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} |
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int get_index() { |
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return _index; |
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} |
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void set_index(int value) { |
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_index = value; |
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} |
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Handle get_element(int index) { |
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if ((_list != NULL) && (index < _count)) { |
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return _list[index]; |
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} else { |
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assert(false, "empty get_element"); |
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return Handle(); |
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} |
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} |
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void set_element(int index, Handle value) { |
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if ((_list != NULL) && (index < _count)) { |
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_list[index] = value; |
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} else { |
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assert(false, "bad set_element"); |
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} |
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} |
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// Other predicates |
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bool available() { |
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return (_list != NULL); |
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} |
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#ifdef ASSERT |
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// For debugging. |
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void check(int limit) { |
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for (int i = 0; i < limit; i += 1) { |
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assert(Universe::heap()->is_in(get_element(i)()), "check fails"); |
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} |
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} |
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#endif |
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// Public methods that get called within the scope of the closure |
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void allocate() { |
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_list = NEW_C_HEAP_ARRAY(Handle, _count); |
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assert(_list != NULL, "Out of memory"); |
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if (_list == NULL) { |
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_count = 0; |
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} |
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} |
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void extract(JvmtiEnv *env, jclass* result) { |
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for (int index = 0; index < _count; index += 1) { |
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result[index] = (jclass) env->jni_reference(get_element(index)); |
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} |
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} |
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// Finally, the static methods that are the callbacks |
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static void increment(klassOop k) { |
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JvmtiGetLoadedClassesClosure* that = JvmtiGetLoadedClassesClosure::get_this(); |
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if (that->get_initiatingLoader() == NULL) { |
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for (klassOop l = k; l != NULL; l = Klass::cast(l)->array_klass_or_null()) { |
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that->set_count(that->get_count() + 1); |
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} |
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} else if (k != NULL) { |
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// if initiating loader not null, just include the instance with 1 dimension |
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that->set_count(that->get_count() + 1); |
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} |
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} |
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static void increment_with_loader(klassOop k, oop loader) { |
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JvmtiGetLoadedClassesClosure* that = JvmtiGetLoadedClassesClosure::get_this(); |
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if (loader == JNIHandles::resolve(that->get_initiatingLoader())) { |
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for (klassOop l = k; l != NULL; l = Klass::cast(l)->array_klass_or_null()) { |
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that->set_count(that->get_count() + 1); |
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} |
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} |
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} |
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static void prim_array_increment_with_loader(klassOop array, oop loader) { |
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JvmtiGetLoadedClassesClosure* that = JvmtiGetLoadedClassesClosure::get_this(); |
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if (loader == JNIHandles::resolve(that->get_initiatingLoader())) { |
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that->set_count(that->get_count() + 1); |
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} |
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} |
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static void add(klassOop k) { |
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JvmtiGetLoadedClassesClosure* that = JvmtiGetLoadedClassesClosure::get_this(); |
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if (that->available()) { |
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if (that->get_initiatingLoader() == NULL) { |
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for (klassOop l = k; l != NULL; l = Klass::cast(l)->array_klass_or_null()) { |
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oop mirror = Klass::cast(l)->java_mirror(); |
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that->set_element(that->get_index(), mirror); |
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that->set_index(that->get_index() + 1); |
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} |
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} else if (k != NULL) { |
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// if initiating loader not null, just include the instance with 1 dimension |
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oop mirror = Klass::cast(k)->java_mirror(); |
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that->set_element(that->get_index(), mirror); |
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that->set_index(that->get_index() + 1); |
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} |
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} |
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} |
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static void add_with_loader(klassOop k, oop loader) { |
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JvmtiGetLoadedClassesClosure* that = JvmtiGetLoadedClassesClosure::get_this(); |
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if (that->available()) { |
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if (loader == JNIHandles::resolve(that->get_initiatingLoader())) { |
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for (klassOop l = k; l != NULL; l = Klass::cast(l)->array_klass_or_null()) { |
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oop mirror = Klass::cast(l)->java_mirror(); |
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that->set_element(that->get_index(), mirror); |
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that->set_index(that->get_index() + 1); |
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} |
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} |
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} |
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} |
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// increment the count for the given basic type array class (and any |
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// multi-dimensional arrays). For example, for [B we check for |
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// [[B, [[[B, .. and the count is incremented for each one that exists. |
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static void increment_for_basic_type_arrays(klassOop k) { |
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JvmtiGetLoadedClassesClosure* that = JvmtiGetLoadedClassesClosure::get_this(); |
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assert(that != NULL, "no JvmtiGetLoadedClassesClosure"); |
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for (klassOop l = k; l != NULL; l = Klass::cast(l)->array_klass_or_null()) { |
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that->set_count(that->get_count() + 1); |
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} |
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} |
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// add the basic type array class and its multi-dimensional array classes to the list |
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static void add_for_basic_type_arrays(klassOop k) { |
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JvmtiGetLoadedClassesClosure* that = JvmtiGetLoadedClassesClosure::get_this(); |
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assert(that != NULL, "no JvmtiGetLoadedClassesClosure"); |
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assert(that->available(), "no list"); |
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for (klassOop l = k; l != NULL; l = Klass::cast(l)->array_klass_or_null()) { |
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oop mirror = Klass::cast(l)->java_mirror(); |
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that->set_element(that->get_index(), mirror); |
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that->set_index(that->get_index() + 1); |
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} |
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} |
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}; |
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jvmtiError |
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JvmtiGetLoadedClasses::getLoadedClasses(JvmtiEnv *env, jint* classCountPtr, jclass** classesPtr) { |
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// Since SystemDictionary::classes_do only takes a function pointer |
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// and doesn't call back with a closure data pointer, |
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// we can only pass static methods. |
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JvmtiGetLoadedClassesClosure closure; |
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{ |
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// To get a consistent list of classes we need MultiArray_lock to ensure |
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// array classes aren't created, and SystemDictionary_lock to ensure that |
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// classes aren't added to the system dictionary, |
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MutexLocker ma(MultiArray_lock); |
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MutexLocker sd(SystemDictionary_lock); |
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// First, count the classes |
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SystemDictionary::classes_do(&JvmtiGetLoadedClassesClosure::increment); |
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Universe::basic_type_classes_do(&JvmtiGetLoadedClassesClosure::increment); |
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// Next, fill in the classes |
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closure.allocate(); |
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SystemDictionary::classes_do(&JvmtiGetLoadedClassesClosure::add); |
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Universe::basic_type_classes_do(&JvmtiGetLoadedClassesClosure::add); |
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// Drop the SystemDictionary_lock, so the results could be wrong from here, |
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// but we still have a snapshot. |
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} |
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// Post results |
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jclass* result_list; |
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jvmtiError err = env->Allocate(closure.get_count() * sizeof(jclass), |
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(unsigned char**)&result_list); |
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if (err != JVMTI_ERROR_NONE) { |
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return err; |
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} |
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closure.extract(env, result_list); |
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*classCountPtr = closure.get_count(); |
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*classesPtr = result_list; |
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return JVMTI_ERROR_NONE; |
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} |
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jvmtiError |
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JvmtiGetLoadedClasses::getClassLoaderClasses(JvmtiEnv *env, jobject initiatingLoader, |
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jint* classCountPtr, jclass** classesPtr) { |
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// Since SystemDictionary::classes_do only takes a function pointer |
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// and doesn't call back with a closure data pointer, |
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// we can only pass static methods. |
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JvmtiGetLoadedClassesClosure closure(initiatingLoader); |
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{ |
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// To get a consistent list of classes we need MultiArray_lock to ensure |
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// array classes aren't created, and SystemDictionary_lock to ensure that |
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// classes aren't added to the system dictionary, |
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MutexLocker ma(MultiArray_lock); |
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MutexLocker sd(SystemDictionary_lock); |
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// First, count the classes in the system dictionary which have this loader recorded |
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// as an initiating loader. For basic type arrays this information is not recorded |
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// so GetClassLoaderClasses will return all of the basic type arrays. This is okay |
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// because the defining loader for basic type arrays is always the boot class loader |
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// and these classes are "visible" to all loaders. |
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SystemDictionary::classes_do(&JvmtiGetLoadedClassesClosure::increment_with_loader); |
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Universe::basic_type_classes_do(&JvmtiGetLoadedClassesClosure::increment_for_basic_type_arrays); |
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// Next, fill in the classes |
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closure.allocate(); |
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SystemDictionary::classes_do(&JvmtiGetLoadedClassesClosure::add_with_loader); |
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Universe::basic_type_classes_do(&JvmtiGetLoadedClassesClosure::add_for_basic_type_arrays); |
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// Drop the SystemDictionary_lock, so the results could be wrong from here, |
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// but we still have a snapshot. |
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} |
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// Post results |
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jclass* result_list; |
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jvmtiError err = env->Allocate(closure.get_count() * sizeof(jclass), |
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(unsigned char**)&result_list); |
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if (err != JVMTI_ERROR_NONE) { |
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return err; |
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} |
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closure.extract(env, result_list); |
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*classCountPtr = closure.get_count(); |
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*classesPtr = result_list; |
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return JVMTI_ERROR_NONE; |
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} |