author | kbarrett |
Thu, 01 Mar 2018 16:51:22 -0500 | |
changeset 49192 | 6734eeef4283 |
parent 49041 | 44122f767467 |
child 49340 | 4e82736053ae |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 2003, 2018, 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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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#include "precompiled.hpp" |
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#include "classfile/javaClasses.inline.hpp" |
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#include "classfile/symbolTable.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "classfile/vmSymbols.hpp" |
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#include "code/codeCache.hpp" |
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#include "jvmtifiles/jvmtiEnv.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "oops/access.inline.hpp" |
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#include "oops/arrayOop.inline.hpp" |
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#include "oops/instanceMirrorKlass.hpp" |
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#include "oops/objArrayKlass.hpp" |
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#include "oops/objArrayOop.inline.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "oops/typeArrayOop.inline.hpp" |
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#include "prims/jvmtiEventController.hpp" |
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#include "prims/jvmtiEventController.inline.hpp" |
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#include "prims/jvmtiExport.hpp" |
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#include "prims/jvmtiImpl.hpp" |
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#include "prims/jvmtiTagMap.hpp" |
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#include "runtime/biasedLocking.hpp" |
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#include "runtime/javaCalls.hpp" |
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#include "runtime/jniHandles.inline.hpp" |
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#include "runtime/mutex.hpp" |
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#include "runtime/mutexLocker.hpp" |
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#include "runtime/reflectionUtils.hpp" |
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#include "runtime/thread.inline.hpp" |
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#include "runtime/threadSMR.hpp" |
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#include "runtime/vframe.hpp" |
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#include "runtime/vmThread.hpp" |
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#include "runtime/vm_operations.hpp" |
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#include "services/serviceUtil.hpp" |
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#include "utilities/macros.hpp" |
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// JvmtiTagHashmapEntry |
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// |
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// Each entry encapsulates a reference to the tagged object |
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// and the tag value. In addition an entry includes a next pointer which |
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// is used to chain entries together. |
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class JvmtiTagHashmapEntry : public CHeapObj<mtInternal> { |
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private: |
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friend class JvmtiTagMap; |
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||
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oop _object; // tagged object |
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jlong _tag; // the tag |
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JvmtiTagHashmapEntry* _next; // next on the list |
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inline void init(oop object, jlong tag) { |
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_object = object; |
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_tag = tag; |
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_next = NULL; |
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} |
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// constructor |
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JvmtiTagHashmapEntry(oop object, jlong tag) { init(object, tag); } |
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public: |
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// accessor methods |
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inline oop* object_addr() { return &_object; } |
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inline oop object() { return RootAccess<ON_PHANTOM_OOP_REF>::oop_load(object_addr()); } |
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// Peek at the object without keeping it alive. The returned object must be |
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// kept alive using a normal access if it leaks out of a thread transition from VM. |
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inline oop object_peek() { |
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return RootAccess<ON_PHANTOM_OOP_REF | AS_NO_KEEPALIVE>::oop_load(object_addr()); |
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} |
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inline jlong tag() const { return _tag; } |
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inline void set_tag(jlong tag) { |
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assert(tag != 0, "can't be zero"); |
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_tag = tag; |
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} |
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inline bool equals(oop object) { |
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return object == object_peek(); |
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} |
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inline JvmtiTagHashmapEntry* next() const { return _next; } |
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inline void set_next(JvmtiTagHashmapEntry* next) { _next = next; } |
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}; |
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// JvmtiTagHashmap |
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// |
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// A hashmap is essentially a table of pointers to entries. Entries |
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// are hashed to a location, or position in the table, and then |
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// chained from that location. The "key" for hashing is address of |
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// the object, or oop. The "value" is the tag value. |
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// |
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// A hashmap maintains a count of the number entries in the hashmap |
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// and resizes if the number of entries exceeds a given threshold. |
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// The threshold is specified as a percentage of the size - for |
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// example a threshold of 0.75 will trigger the hashmap to resize |
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// if the number of entries is >75% of table size. |
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// |
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// A hashmap provides functions for adding, removing, and finding |
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// entries. It also provides a function to iterate over all entries |
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// in the hashmap. |
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class JvmtiTagHashmap : public CHeapObj<mtInternal> { |
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private: |
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friend class JvmtiTagMap; |
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enum { |
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small_trace_threshold = 10000, // threshold for tracing |
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medium_trace_threshold = 100000, |
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large_trace_threshold = 1000000, |
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initial_trace_threshold = small_trace_threshold |
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}; |
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static int _sizes[]; // array of possible hashmap sizes |
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int _size; // actual size of the table |
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int _size_index; // index into size table |
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int _entry_count; // number of entries in the hashmap |
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float _load_factor; // load factor as a % of the size |
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int _resize_threshold; // computed threshold to trigger resizing. |
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bool _resizing_enabled; // indicates if hashmap can resize |
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int _trace_threshold; // threshold for trace messages |
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JvmtiTagHashmapEntry** _table; // the table of entries. |
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// private accessors |
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int resize_threshold() const { return _resize_threshold; } |
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int trace_threshold() const { return _trace_threshold; } |
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// initialize the hashmap |
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void init(int size_index=0, float load_factor=4.0f) { |
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int initial_size = _sizes[size_index]; |
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_size_index = size_index; |
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_size = initial_size; |
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_entry_count = 0; |
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_trace_threshold = initial_trace_threshold; |
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_load_factor = load_factor; |
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_resize_threshold = (int)(_load_factor * _size); |
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_resizing_enabled = true; |
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size_t s = initial_size * sizeof(JvmtiTagHashmapEntry*); |
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_table = (JvmtiTagHashmapEntry**)os::malloc(s, mtInternal); |
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if (_table == NULL) { |
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vm_exit_out_of_memory(s, OOM_MALLOC_ERROR, |
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"unable to allocate initial hashtable for jvmti object tags"); |
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} |
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for (int i=0; i<initial_size; i++) { |
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_table[i] = NULL; |
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} |
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} |
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// hash a given key (oop) with the specified size |
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static unsigned int hash(oop key, int size) { |
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// shift right to get better distribution (as these bits will be zero |
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// with aligned addresses) |
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unsigned int addr = (unsigned int)(cast_from_oop<intptr_t>(key)); |
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#ifdef _LP64 |
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return (addr >> 3) % size; |
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#else |
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return (addr >> 2) % size; |
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#endif |
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} |
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// hash a given key (oop) |
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unsigned int hash(oop key) { |
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return hash(key, _size); |
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} |
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// resize the hashmap - allocates a large table and re-hashes |
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// all entries into the new table. |
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void resize() { |
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int new_size_index = _size_index+1; |
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int new_size = _sizes[new_size_index]; |
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if (new_size < 0) { |
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// hashmap already at maximum capacity |
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return; |
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} |
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202 |
// allocate new table |
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size_t s = new_size * sizeof(JvmtiTagHashmapEntry*); |
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JvmtiTagHashmapEntry** new_table = (JvmtiTagHashmapEntry**)os::malloc(s, mtInternal); |
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if (new_table == NULL) { |
206 |
warning("unable to allocate larger hashtable for jvmti object tags"); |
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set_resizing_enabled(false); |
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return; |
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} |
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// initialize new table |
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int i; |
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for (i=0; i<new_size; i++) { |
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new_table[i] = NULL; |
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} |
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// rehash all entries into the new table |
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for (i=0; i<_size; i++) { |
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JvmtiTagHashmapEntry* entry = _table[i]; |
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while (entry != NULL) { |
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JvmtiTagHashmapEntry* next = entry->next(); |
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oop key = entry->object_peek(); |
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assert(key != NULL, "jni weak reference cleared!!"); |
224 |
unsigned int h = hash(key, new_size); |
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225 |
JvmtiTagHashmapEntry* anchor = new_table[h]; |
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if (anchor == NULL) { |
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new_table[h] = entry; |
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entry->set_next(NULL); |
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} else { |
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230 |
entry->set_next(anchor); |
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231 |
new_table[h] = entry; |
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232 |
} |
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entry = next; |
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234 |
} |
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235 |
} |
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236 |
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237 |
// free old table and update settings. |
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238 |
os::free((void*)_table); |
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239 |
_table = new_table; |
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240 |
_size_index = new_size_index; |
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_size = new_size; |
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242 |
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243 |
// compute new resize threshold |
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244 |
_resize_threshold = (int)(_load_factor * _size); |
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245 |
} |
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246 |
||
247 |
||
248 |
// internal remove function - remove an entry at a given position in the |
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249 |
// table. |
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250 |
inline void remove(JvmtiTagHashmapEntry* prev, int pos, JvmtiTagHashmapEntry* entry) { |
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251 |
assert(pos >= 0 && pos < _size, "out of range"); |
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252 |
if (prev == NULL) { |
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253 |
_table[pos] = entry->next(); |
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254 |
} else { |
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255 |
prev->set_next(entry->next()); |
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256 |
} |
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257 |
assert(_entry_count > 0, "checking"); |
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258 |
_entry_count--; |
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259 |
} |
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260 |
||
261 |
// resizing switch |
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262 |
bool is_resizing_enabled() const { return _resizing_enabled; } |
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263 |
void set_resizing_enabled(bool enable) { _resizing_enabled = enable; } |
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264 |
||
265 |
// debugging |
|
266 |
void print_memory_usage(); |
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267 |
void compute_next_trace_threshold(); |
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268 |
||
269 |
public: |
|
270 |
||
271 |
// create a JvmtiTagHashmap of a preferred size and optionally a load factor. |
|
272 |
// The preferred size is rounded down to an actual size. |
|
273 |
JvmtiTagHashmap(int size, float load_factor=0.0f) { |
|
274 |
int i=0; |
|
275 |
while (_sizes[i] < size) { |
|
276 |
if (_sizes[i] < 0) { |
|
277 |
assert(i > 0, "sanity check"); |
|
278 |
i--; |
|
279 |
break; |
|
280 |
} |
|
281 |
i++; |
|
282 |
} |
|
283 |
||
284 |
// if a load factor is specified then use it, otherwise use default |
|
285 |
if (load_factor > 0.01f) { |
|
286 |
init(i, load_factor); |
|
287 |
} else { |
|
288 |
init(i); |
|
289 |
} |
|
290 |
} |
|
291 |
||
292 |
// create a JvmtiTagHashmap with default settings |
|
293 |
JvmtiTagHashmap() { |
|
294 |
init(); |
|
295 |
} |
|
296 |
||
297 |
// release table when JvmtiTagHashmap destroyed |
|
298 |
~JvmtiTagHashmap() { |
|
299 |
if (_table != NULL) { |
|
300 |
os::free((void*)_table); |
|
301 |
_table = NULL; |
|
302 |
} |
|
303 |
} |
|
304 |
||
305 |
// accessors |
|
306 |
int size() const { return _size; } |
|
307 |
JvmtiTagHashmapEntry** table() const { return _table; } |
|
308 |
int entry_count() const { return _entry_count; } |
|
309 |
||
310 |
// find an entry in the hashmap, returns NULL if not found. |
|
311 |
inline JvmtiTagHashmapEntry* find(oop key) { |
|
312 |
unsigned int h = hash(key); |
|
313 |
JvmtiTagHashmapEntry* entry = _table[h]; |
|
314 |
while (entry != NULL) { |
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if (entry->equals(key)) { |
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return entry; |
1 | 317 |
} |
318 |
entry = entry->next(); |
|
319 |
} |
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return NULL; |
1 | 321 |
} |
322 |
||
323 |
||
324 |
// add a new entry to hashmap |
|
325 |
inline void add(oop key, JvmtiTagHashmapEntry* entry) { |
|
326 |
assert(key != NULL, "checking"); |
|
327 |
assert(find(key) == NULL, "duplicate detected"); |
|
328 |
unsigned int h = hash(key); |
|
329 |
JvmtiTagHashmapEntry* anchor = _table[h]; |
|
330 |
if (anchor == NULL) { |
|
331 |
_table[h] = entry; |
|
332 |
entry->set_next(NULL); |
|
333 |
} else { |
|
334 |
entry->set_next(anchor); |
|
335 |
_table[h] = entry; |
|
336 |
} |
|
337 |
||
338 |
_entry_count++; |
|
37993 | 339 |
if (log_is_enabled(Debug, jvmti, objecttagging) && entry_count() >= trace_threshold()) { |
1 | 340 |
print_memory_usage(); |
341 |
compute_next_trace_threshold(); |
|
342 |
} |
|
343 |
||
344 |
// if the number of entries exceed the threshold then resize |
|
345 |
if (entry_count() > resize_threshold() && is_resizing_enabled()) { |
|
346 |
resize(); |
|
347 |
} |
|
348 |
} |
|
349 |
||
350 |
// remove an entry with the given key. |
|
351 |
inline JvmtiTagHashmapEntry* remove(oop key) { |
|
352 |
unsigned int h = hash(key); |
|
353 |
JvmtiTagHashmapEntry* entry = _table[h]; |
|
354 |
JvmtiTagHashmapEntry* prev = NULL; |
|
355 |
while (entry != NULL) { |
|
48616
80239a242d34
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diff
changeset
|
356 |
if (entry->equals(key)) { |
1 | 357 |
break; |
358 |
} |
|
359 |
prev = entry; |
|
360 |
entry = entry->next(); |
|
361 |
} |
|
362 |
if (entry != NULL) { |
|
363 |
remove(prev, h, entry); |
|
364 |
} |
|
365 |
return entry; |
|
366 |
} |
|
367 |
||
368 |
// iterate over all entries in the hashmap |
|
369 |
void entry_iterate(JvmtiTagHashmapEntryClosure* closure); |
|
370 |
}; |
|
371 |
||
372 |
// possible hashmap sizes - odd primes that roughly double in size. |
|
373 |
// To avoid excessive resizing the odd primes from 4801-76831 and |
|
374 |
// 76831-307261 have been removed. The list must be terminated by -1. |
|
375 |
int JvmtiTagHashmap::_sizes[] = { 4801, 76831, 307261, 614563, 1228891, |
|
376 |
2457733, 4915219, 9830479, 19660831, 39321619, 78643219, -1 }; |
|
377 |
||
378 |
||
379 |
// A supporting class for iterating over all entries in Hashmap |
|
380 |
class JvmtiTagHashmapEntryClosure { |
|
381 |
public: |
|
382 |
virtual void do_entry(JvmtiTagHashmapEntry* entry) = 0; |
|
383 |
}; |
|
384 |
||
385 |
||
386 |
// iterate over all entries in the hashmap |
|
387 |
void JvmtiTagHashmap::entry_iterate(JvmtiTagHashmapEntryClosure* closure) { |
|
388 |
for (int i=0; i<_size; i++) { |
|
389 |
JvmtiTagHashmapEntry* entry = _table[i]; |
|
390 |
JvmtiTagHashmapEntry* prev = NULL; |
|
391 |
while (entry != NULL) { |
|
392 |
// obtain the next entry before invoking do_entry - this is |
|
393 |
// necessary because do_entry may remove the entry from the |
|
394 |
// hashmap. |
|
395 |
JvmtiTagHashmapEntry* next = entry->next(); |
|
396 |
closure->do_entry(entry); |
|
397 |
entry = next; |
|
398 |
} |
|
399 |
} |
|
400 |
} |
|
401 |
||
402 |
// debugging |
|
403 |
void JvmtiTagHashmap::print_memory_usage() { |
|
404 |
intptr_t p = (intptr_t)this; |
|
405 |
tty->print("[JvmtiTagHashmap @ " INTPTR_FORMAT, p); |
|
406 |
||
407 |
// table + entries in KB |
|
408 |
int hashmap_usage = (size()*sizeof(JvmtiTagHashmapEntry*) + |
|
409 |
entry_count()*sizeof(JvmtiTagHashmapEntry))/K; |
|
410 |
||
411 |
int weak_globals_usage = (int)(JNIHandles::weak_global_handle_memory_usage()/K); |
|
412 |
tty->print_cr(", %d entries (%d KB) <JNI weak globals: %d KB>]", |
|
413 |
entry_count(), hashmap_usage, weak_globals_usage); |
|
414 |
} |
|
415 |
||
416 |
// compute threshold for the next trace message |
|
417 |
void JvmtiTagHashmap::compute_next_trace_threshold() { |
|
37993 | 418 |
_trace_threshold = entry_count(); |
1 | 419 |
if (trace_threshold() < medium_trace_threshold) { |
420 |
_trace_threshold += small_trace_threshold; |
|
421 |
} else { |
|
422 |
if (trace_threshold() < large_trace_threshold) { |
|
423 |
_trace_threshold += medium_trace_threshold; |
|
424 |
} else { |
|
425 |
_trace_threshold += large_trace_threshold; |
|
426 |
} |
|
427 |
} |
|
428 |
} |
|
429 |
||
430 |
// create a JvmtiTagMap |
|
431 |
JvmtiTagMap::JvmtiTagMap(JvmtiEnv* env) : |
|
432 |
_env(env), |
|
433 |
_lock(Mutex::nonleaf+2, "JvmtiTagMap._lock", false), |
|
434 |
_free_entries(NULL), |
|
435 |
_free_entries_count(0) |
|
436 |
{ |
|
437 |
assert(JvmtiThreadState_lock->is_locked(), "sanity check"); |
|
438 |
assert(((JvmtiEnvBase *)env)->tag_map() == NULL, "tag map already exists for environment"); |
|
439 |
||
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
440 |
_hashmap = new JvmtiTagHashmap(); |
1 | 441 |
|
442 |
// finally add us to the environment |
|
443 |
((JvmtiEnvBase *)env)->set_tag_map(this); |
|
444 |
} |
|
445 |
||
446 |
||
447 |
// destroy a JvmtiTagMap |
|
448 |
JvmtiTagMap::~JvmtiTagMap() { |
|
449 |
||
450 |
// no lock acquired as we assume the enclosing environment is |
|
451 |
// also being destroryed. |
|
452 |
((JvmtiEnvBase *)_env)->set_tag_map(NULL); |
|
453 |
||
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
454 |
JvmtiTagHashmapEntry** table = _hashmap->table(); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
455 |
for (int j = 0; j < _hashmap->size(); j++) { |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
456 |
JvmtiTagHashmapEntry* entry = table[j]; |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
457 |
while (entry != NULL) { |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
458 |
JvmtiTagHashmapEntry* next = entry->next(); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
459 |
delete entry; |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
460 |
entry = next; |
1 | 461 |
} |
462 |
} |
|
463 |
||
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
464 |
// finally destroy the hashmap |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
465 |
delete _hashmap; |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
466 |
_hashmap = NULL; |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
467 |
|
1 | 468 |
// remove any entries on the free list |
469 |
JvmtiTagHashmapEntry* entry = _free_entries; |
|
470 |
while (entry != NULL) { |
|
471 |
JvmtiTagHashmapEntry* next = entry->next(); |
|
472 |
delete entry; |
|
473 |
entry = next; |
|
474 |
} |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
475 |
_free_entries = NULL; |
1 | 476 |
} |
477 |
||
478 |
// create a hashmap entry |
|
479 |
// - if there's an entry on the (per-environment) free list then this |
|
480 |
// is returned. Otherwise an new entry is allocated. |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
481 |
JvmtiTagHashmapEntry* JvmtiTagMap::create_entry(oop ref, jlong tag) { |
1 | 482 |
assert(Thread::current()->is_VM_thread() || is_locked(), "checking"); |
483 |
JvmtiTagHashmapEntry* entry; |
|
484 |
if (_free_entries == NULL) { |
|
485 |
entry = new JvmtiTagHashmapEntry(ref, tag); |
|
486 |
} else { |
|
487 |
assert(_free_entries_count > 0, "mismatched _free_entries_count"); |
|
488 |
_free_entries_count--; |
|
489 |
entry = _free_entries; |
|
490 |
_free_entries = entry->next(); |
|
491 |
entry->init(ref, tag); |
|
492 |
} |
|
493 |
return entry; |
|
494 |
} |
|
495 |
||
496 |
// destroy an entry by returning it to the free list |
|
497 |
void JvmtiTagMap::destroy_entry(JvmtiTagHashmapEntry* entry) { |
|
498 |
assert(SafepointSynchronize::is_at_safepoint() || is_locked(), "checking"); |
|
499 |
// limit the size of the free list |
|
500 |
if (_free_entries_count >= max_free_entries) { |
|
501 |
delete entry; |
|
502 |
} else { |
|
503 |
entry->set_next(_free_entries); |
|
504 |
_free_entries = entry; |
|
505 |
_free_entries_count++; |
|
506 |
} |
|
507 |
} |
|
508 |
||
509 |
// returns the tag map for the given environments. If the tag map |
|
510 |
// doesn't exist then it is created. |
|
511 |
JvmtiTagMap* JvmtiTagMap::tag_map_for(JvmtiEnv* env) { |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
512 |
JvmtiTagMap* tag_map = ((JvmtiEnvBase*)env)->tag_map(); |
1 | 513 |
if (tag_map == NULL) { |
514 |
MutexLocker mu(JvmtiThreadState_lock); |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
515 |
tag_map = ((JvmtiEnvBase*)env)->tag_map(); |
1 | 516 |
if (tag_map == NULL) { |
517 |
tag_map = new JvmtiTagMap(env); |
|
518 |
} |
|
519 |
} else { |
|
520 |
CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
|
521 |
} |
|
522 |
return tag_map; |
|
523 |
} |
|
524 |
||
525 |
// iterate over all entries in the tag map. |
|
526 |
void JvmtiTagMap::entry_iterate(JvmtiTagHashmapEntryClosure* closure) { |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
527 |
hashmap()->entry_iterate(closure); |
1 | 528 |
} |
529 |
||
530 |
// returns true if the hashmaps are empty |
|
531 |
bool JvmtiTagMap::is_empty() { |
|
532 |
assert(SafepointSynchronize::is_at_safepoint() || is_locked(), "checking"); |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
533 |
return hashmap()->entry_count() == 0; |
1 | 534 |
} |
535 |
||
536 |
||
537 |
// Return the tag value for an object, or 0 if the object is |
|
538 |
// not tagged |
|
539 |
// |
|
540 |
static inline jlong tag_for(JvmtiTagMap* tag_map, oop o) { |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
541 |
JvmtiTagHashmapEntry* entry = tag_map->hashmap()->find(o); |
1 | 542 |
if (entry == NULL) { |
543 |
return 0; |
|
544 |
} else { |
|
545 |
return entry->tag(); |
|
546 |
} |
|
547 |
} |
|
548 |
||
549 |
||
550 |
// A CallbackWrapper is a support class for querying and tagging an object |
|
551 |
// around a callback to a profiler. The constructor does pre-callback |
|
552 |
// work to get the tag value, klass tag value, ... and the destructor |
|
553 |
// does the post-callback work of tagging or untagging the object. |
|
554 |
// |
|
555 |
// { |
|
556 |
// CallbackWrapper wrapper(tag_map, o); |
|
557 |
// |
|
558 |
// (*callback)(wrapper.klass_tag(), wrapper.obj_size(), wrapper.obj_tag_p(), ...) |
|
559 |
// |
|
560 |
// } // wrapper goes out of scope here which results in the destructor |
|
561 |
// checking to see if the object has been tagged, untagged, or the |
|
562 |
// tag value has changed. |
|
563 |
// |
|
564 |
class CallbackWrapper : public StackObj { |
|
565 |
private: |
|
566 |
JvmtiTagMap* _tag_map; |
|
567 |
JvmtiTagHashmap* _hashmap; |
|
568 |
JvmtiTagHashmapEntry* _entry; |
|
569 |
oop _o; |
|
570 |
jlong _obj_size; |
|
571 |
jlong _obj_tag; |
|
572 |
jlong _klass_tag; |
|
573 |
||
574 |
protected: |
|
575 |
JvmtiTagMap* tag_map() const { return _tag_map; } |
|
576 |
||
577 |
// invoked post-callback to tag, untag, or update the tag of an object |
|
578 |
void inline post_callback_tag_update(oop o, JvmtiTagHashmap* hashmap, |
|
579 |
JvmtiTagHashmapEntry* entry, jlong obj_tag); |
|
580 |
public: |
|
581 |
CallbackWrapper(JvmtiTagMap* tag_map, oop o) { |
|
582 |
assert(Thread::current()->is_VM_thread() || tag_map->is_locked(), |
|
583 |
"MT unsafe or must be VM thread"); |
|
584 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
585 |
// object to tag |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
586 |
_o = o; |
1 | 587 |
|
588 |
// object size |
|
13096
8a01a0702816
7178846: IterateThroughHeap: heap_iteration_callback passes a negative size
sla
parents:
11773
diff
changeset
|
589 |
_obj_size = (jlong)_o->size() * wordSize; |
1 | 590 |
|
591 |
// record the context |
|
592 |
_tag_map = tag_map; |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
593 |
_hashmap = tag_map->hashmap(); |
1 | 594 |
_entry = _hashmap->find(_o); |
595 |
||
596 |
// get object tag |
|
597 |
_obj_tag = (_entry == NULL) ? 0 : _entry->tag(); |
|
598 |
||
599 |
// get the class and the class's tag value |
|
33602 | 600 |
assert(SystemDictionary::Class_klass()->is_mirror_instance_klass(), "Is not?"); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
601 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
602 |
_klass_tag = tag_for(tag_map, _o->klass()->java_mirror()); |
1 | 603 |
} |
604 |
||
605 |
~CallbackWrapper() { |
|
606 |
post_callback_tag_update(_o, _hashmap, _entry, _obj_tag); |
|
607 |
} |
|
608 |
||
609 |
inline jlong* obj_tag_p() { return &_obj_tag; } |
|
610 |
inline jlong obj_size() const { return _obj_size; } |
|
611 |
inline jlong obj_tag() const { return _obj_tag; } |
|
612 |
inline jlong klass_tag() const { return _klass_tag; } |
|
613 |
}; |
|
614 |
||
615 |
||
616 |
||
617 |
// callback post-callback to tag, untag, or update the tag of an object |
|
618 |
void inline CallbackWrapper::post_callback_tag_update(oop o, |
|
619 |
JvmtiTagHashmap* hashmap, |
|
620 |
JvmtiTagHashmapEntry* entry, |
|
621 |
jlong obj_tag) { |
|
622 |
if (entry == NULL) { |
|
623 |
if (obj_tag != 0) { |
|
624 |
// callback has tagged the object |
|
625 |
assert(Thread::current()->is_VM_thread(), "must be VMThread"); |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
626 |
entry = tag_map()->create_entry(o, obj_tag); |
1 | 627 |
hashmap->add(o, entry); |
628 |
} |
|
629 |
} else { |
|
630 |
// object was previously tagged - the callback may have untagged |
|
631 |
// the object or changed the tag value |
|
632 |
if (obj_tag == 0) { |
|
633 |
||
634 |
JvmtiTagHashmapEntry* entry_removed = hashmap->remove(o); |
|
635 |
assert(entry_removed == entry, "checking"); |
|
636 |
tag_map()->destroy_entry(entry); |
|
637 |
||
638 |
} else { |
|
639 |
if (obj_tag != entry->tag()) { |
|
640 |
entry->set_tag(obj_tag); |
|
641 |
} |
|
642 |
} |
|
643 |
} |
|
644 |
} |
|
645 |
||
646 |
// An extended CallbackWrapper used when reporting an object reference |
|
647 |
// to the agent. |
|
648 |
// |
|
649 |
// { |
|
650 |
// TwoOopCallbackWrapper wrapper(tag_map, referrer, o); |
|
651 |
// |
|
652 |
// (*callback)(wrapper.klass_tag(), |
|
653 |
// wrapper.obj_size(), |
|
654 |
// wrapper.obj_tag_p() |
|
655 |
// wrapper.referrer_tag_p(), ...) |
|
656 |
// |
|
657 |
// } // wrapper goes out of scope here which results in the destructor |
|
658 |
// checking to see if the referrer object has been tagged, untagged, |
|
659 |
// or the tag value has changed. |
|
660 |
// |
|
661 |
class TwoOopCallbackWrapper : public CallbackWrapper { |
|
662 |
private: |
|
663 |
bool _is_reference_to_self; |
|
664 |
JvmtiTagHashmap* _referrer_hashmap; |
|
665 |
JvmtiTagHashmapEntry* _referrer_entry; |
|
666 |
oop _referrer; |
|
667 |
jlong _referrer_obj_tag; |
|
668 |
jlong _referrer_klass_tag; |
|
669 |
jlong* _referrer_tag_p; |
|
670 |
||
671 |
bool is_reference_to_self() const { return _is_reference_to_self; } |
|
672 |
||
673 |
public: |
|
674 |
TwoOopCallbackWrapper(JvmtiTagMap* tag_map, oop referrer, oop o) : |
|
675 |
CallbackWrapper(tag_map, o) |
|
676 |
{ |
|
677 |
// self reference needs to be handled in a special way |
|
678 |
_is_reference_to_self = (referrer == o); |
|
679 |
||
680 |
if (_is_reference_to_self) { |
|
681 |
_referrer_klass_tag = klass_tag(); |
|
682 |
_referrer_tag_p = obj_tag_p(); |
|
683 |
} else { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
684 |
_referrer = referrer; |
1 | 685 |
// record the context |
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
686 |
_referrer_hashmap = tag_map->hashmap(); |
1 | 687 |
_referrer_entry = _referrer_hashmap->find(_referrer); |
688 |
||
689 |
// get object tag |
|
690 |
_referrer_obj_tag = (_referrer_entry == NULL) ? 0 : _referrer_entry->tag(); |
|
691 |
_referrer_tag_p = &_referrer_obj_tag; |
|
692 |
||
693 |
// get referrer class tag. |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
694 |
_referrer_klass_tag = tag_for(tag_map, _referrer->klass()->java_mirror()); |
1 | 695 |
} |
696 |
} |
|
697 |
||
698 |
~TwoOopCallbackWrapper() { |
|
699 |
if (!is_reference_to_self()){ |
|
700 |
post_callback_tag_update(_referrer, |
|
701 |
_referrer_hashmap, |
|
702 |
_referrer_entry, |
|
703 |
_referrer_obj_tag); |
|
704 |
} |
|
705 |
} |
|
706 |
||
707 |
// address of referrer tag |
|
708 |
// (for a self reference this will return the same thing as obj_tag_p()) |
|
709 |
inline jlong* referrer_tag_p() { return _referrer_tag_p; } |
|
710 |
||
711 |
// referrer's class tag |
|
712 |
inline jlong referrer_klass_tag() { return _referrer_klass_tag; } |
|
713 |
}; |
|
714 |
||
715 |
// tag an object |
|
716 |
// |
|
717 |
// This function is performance critical. If many threads attempt to tag objects |
|
718 |
// around the same time then it's possible that the Mutex associated with the |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
719 |
// tag map will be a hot lock. |
1 | 720 |
void JvmtiTagMap::set_tag(jobject object, jlong tag) { |
721 |
MutexLocker ml(lock()); |
|
722 |
||
723 |
// resolve the object |
|
724 |
oop o = JNIHandles::resolve_non_null(object); |
|
725 |
||
726 |
// see if the object is already tagged |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
727 |
JvmtiTagHashmap* hashmap = _hashmap; |
1 | 728 |
JvmtiTagHashmapEntry* entry = hashmap->find(o); |
729 |
||
730 |
// if the object is not already tagged then we tag it |
|
731 |
if (entry == NULL) { |
|
732 |
if (tag != 0) { |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
733 |
entry = create_entry(o, tag); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
734 |
hashmap->add(o, entry); |
1 | 735 |
} else { |
736 |
// no-op |
|
737 |
} |
|
738 |
} else { |
|
739 |
// if the object is already tagged then we either update |
|
740 |
// the tag (if a new tag value has been provided) |
|
741 |
// or remove the object if the new tag value is 0. |
|
742 |
if (tag == 0) { |
|
743 |
hashmap->remove(o); |
|
744 |
destroy_entry(entry); |
|
745 |
} else { |
|
746 |
entry->set_tag(tag); |
|
747 |
} |
|
748 |
} |
|
749 |
} |
|
750 |
||
751 |
// get the tag for an object |
|
752 |
jlong JvmtiTagMap::get_tag(jobject object) { |
|
753 |
MutexLocker ml(lock()); |
|
754 |
||
755 |
// resolve the object |
|
756 |
oop o = JNIHandles::resolve_non_null(object); |
|
757 |
||
13728
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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13391
diff
changeset
|
758 |
return tag_for(this, o); |
1 | 759 |
} |
760 |
||
761 |
||
762 |
// Helper class used to describe the static or instance fields of a class. |
|
763 |
// For each field it holds the field index (as defined by the JVMTI specification), |
|
764 |
// the field type, and the offset. |
|
765 |
||
13195 | 766 |
class ClassFieldDescriptor: public CHeapObj<mtInternal> { |
1 | 767 |
private: |
768 |
int _field_index; |
|
769 |
int _field_offset; |
|
770 |
char _field_type; |
|
771 |
public: |
|
772 |
ClassFieldDescriptor(int index, char type, int offset) : |
|
773 |
_field_index(index), _field_type(type), _field_offset(offset) { |
|
774 |
} |
|
775 |
int field_index() const { return _field_index; } |
|
776 |
char field_type() const { return _field_type; } |
|
777 |
int field_offset() const { return _field_offset; } |
|
778 |
}; |
|
779 |
||
13195 | 780 |
class ClassFieldMap: public CHeapObj<mtInternal> { |
1 | 781 |
private: |
782 |
enum { |
|
783 |
initial_field_count = 5 |
|
784 |
}; |
|
785 |
||
786 |
// list of field descriptors |
|
787 |
GrowableArray<ClassFieldDescriptor*>* _fields; |
|
788 |
||
789 |
// constructor |
|
790 |
ClassFieldMap(); |
|
791 |
||
792 |
// add a field |
|
793 |
void add(int index, char type, int offset); |
|
794 |
||
795 |
// returns the field count for the given class |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
796 |
static int compute_field_count(InstanceKlass* ik); |
1 | 797 |
|
798 |
public: |
|
799 |
~ClassFieldMap(); |
|
800 |
||
801 |
// access |
|
802 |
int field_count() { return _fields->length(); } |
|
803 |
ClassFieldDescriptor* field_at(int i) { return _fields->at(i); } |
|
804 |
||
805 |
// functions to create maps of static or instance fields |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
806 |
static ClassFieldMap* create_map_of_static_fields(Klass* k); |
1 | 807 |
static ClassFieldMap* create_map_of_instance_fields(oop obj); |
808 |
}; |
|
809 |
||
810 |
ClassFieldMap::ClassFieldMap() { |
|
13195 | 811 |
_fields = new (ResourceObj::C_HEAP, mtInternal) |
812 |
GrowableArray<ClassFieldDescriptor*>(initial_field_count, true); |
|
1 | 813 |
} |
814 |
||
815 |
ClassFieldMap::~ClassFieldMap() { |
|
816 |
for (int i=0; i<_fields->length(); i++) { |
|
817 |
delete _fields->at(i); |
|
818 |
} |
|
819 |
delete _fields; |
|
820 |
} |
|
821 |
||
822 |
void ClassFieldMap::add(int index, char type, int offset) { |
|
823 |
ClassFieldDescriptor* field = new ClassFieldDescriptor(index, type, offset); |
|
824 |
_fields->append(field); |
|
825 |
} |
|
826 |
||
827 |
// Returns a heap allocated ClassFieldMap to describe the static fields |
|
828 |
// of the given class. |
|
829 |
// |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
830 |
ClassFieldMap* ClassFieldMap::create_map_of_static_fields(Klass* k) { |
1 | 831 |
HandleMark hm; |
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
832 |
InstanceKlass* ik = InstanceKlass::cast(k); |
1 | 833 |
|
834 |
// create the field map |
|
835 |
ClassFieldMap* field_map = new ClassFieldMap(); |
|
836 |
||
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
837 |
FilteredFieldStream f(ik, false, false); |
1 | 838 |
int max_field_index = f.field_count()-1; |
839 |
||
840 |
int index = 0; |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
841 |
for (FilteredFieldStream fld(ik, true, true); !fld.eos(); fld.next(), index++) { |
1 | 842 |
// ignore instance fields |
843 |
if (!fld.access_flags().is_static()) { |
|
844 |
continue; |
|
845 |
} |
|
846 |
field_map->add(max_field_index - index, fld.signature()->byte_at(0), fld.offset()); |
|
847 |
} |
|
848 |
return field_map; |
|
849 |
} |
|
850 |
||
851 |
// Returns a heap allocated ClassFieldMap to describe the instance fields |
|
852 |
// of the given class. All instance fields are included (this means public |
|
853 |
// and private fields declared in superclasses and superinterfaces too). |
|
854 |
// |
|
855 |
ClassFieldMap* ClassFieldMap::create_map_of_instance_fields(oop obj) { |
|
856 |
HandleMark hm; |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
857 |
InstanceKlass* ik = InstanceKlass::cast(obj->klass()); |
1 | 858 |
|
859 |
// create the field map |
|
860 |
ClassFieldMap* field_map = new ClassFieldMap(); |
|
861 |
||
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
862 |
FilteredFieldStream f(ik, false, false); |
1 | 863 |
|
864 |
int max_field_index = f.field_count()-1; |
|
865 |
||
866 |
int index = 0; |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
867 |
for (FilteredFieldStream fld(ik, false, false); !fld.eos(); fld.next(), index++) { |
1 | 868 |
// ignore static fields |
869 |
if (fld.access_flags().is_static()) { |
|
870 |
continue; |
|
871 |
} |
|
872 |
field_map->add(max_field_index - index, fld.signature()->byte_at(0), fld.offset()); |
|
873 |
} |
|
874 |
||
875 |
return field_map; |
|
876 |
} |
|
877 |
||
878 |
// Helper class used to cache a ClassFileMap for the instance fields of |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
879 |
// a cache. A JvmtiCachedClassFieldMap can be cached by an InstanceKlass during |
1 | 880 |
// heap iteration and avoid creating a field map for each object in the heap |
881 |
// (only need to create the map when the first instance of a class is encountered). |
|
882 |
// |
|
13195 | 883 |
class JvmtiCachedClassFieldMap : public CHeapObj<mtInternal> { |
1 | 884 |
private: |
885 |
enum { |
|
886 |
initial_class_count = 200 |
|
887 |
}; |
|
888 |
ClassFieldMap* _field_map; |
|
889 |
||
890 |
ClassFieldMap* field_map() const { return _field_map; } |
|
891 |
||
892 |
JvmtiCachedClassFieldMap(ClassFieldMap* field_map); |
|
893 |
~JvmtiCachedClassFieldMap(); |
|
894 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
895 |
static GrowableArray<InstanceKlass*>* _class_list; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
896 |
static void add_to_class_list(InstanceKlass* ik); |
1 | 897 |
|
898 |
public: |
|
899 |
// returns the field map for a given object (returning map cached |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
900 |
// by InstanceKlass if possible |
1 | 901 |
static ClassFieldMap* get_map_of_instance_fields(oop obj); |
902 |
||
903 |
// removes the field map from all instanceKlasses - should be |
|
904 |
// called before VM operation completes |
|
905 |
static void clear_cache(); |
|
906 |
||
907 |
// returns the number of ClassFieldMap cached by instanceKlasses |
|
908 |
static int cached_field_map_count(); |
|
909 |
}; |
|
910 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
911 |
GrowableArray<InstanceKlass*>* JvmtiCachedClassFieldMap::_class_list; |
1 | 912 |
|
913 |
JvmtiCachedClassFieldMap::JvmtiCachedClassFieldMap(ClassFieldMap* field_map) { |
|
914 |
_field_map = field_map; |
|
915 |
} |
|
916 |
||
917 |
JvmtiCachedClassFieldMap::~JvmtiCachedClassFieldMap() { |
|
918 |
if (_field_map != NULL) { |
|
919 |
delete _field_map; |
|
920 |
} |
|
921 |
} |
|
922 |
||
923 |
// Marker class to ensure that the class file map cache is only used in a defined |
|
924 |
// scope. |
|
925 |
class ClassFieldMapCacheMark : public StackObj { |
|
926 |
private: |
|
927 |
static bool _is_active; |
|
928 |
public: |
|
929 |
ClassFieldMapCacheMark() { |
|
930 |
assert(Thread::current()->is_VM_thread(), "must be VMThread"); |
|
931 |
assert(JvmtiCachedClassFieldMap::cached_field_map_count() == 0, "cache not empty"); |
|
932 |
assert(!_is_active, "ClassFieldMapCacheMark cannot be nested"); |
|
933 |
_is_active = true; |
|
934 |
} |
|
935 |
~ClassFieldMapCacheMark() { |
|
936 |
JvmtiCachedClassFieldMap::clear_cache(); |
|
937 |
_is_active = false; |
|
938 |
} |
|
939 |
static bool is_active() { return _is_active; } |
|
940 |
}; |
|
941 |
||
942 |
bool ClassFieldMapCacheMark::_is_active; |
|
943 |
||
944 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
945 |
// record that the given InstanceKlass is caching a field map |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
946 |
void JvmtiCachedClassFieldMap::add_to_class_list(InstanceKlass* ik) { |
1 | 947 |
if (_class_list == NULL) { |
13195 | 948 |
_class_list = new (ResourceObj::C_HEAP, mtInternal) |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
949 |
GrowableArray<InstanceKlass*>(initial_class_count, true); |
1 | 950 |
} |
951 |
_class_list->push(ik); |
|
952 |
} |
|
953 |
||
954 |
// returns the instance field map for the given object |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
955 |
// (returns field map cached by the InstanceKlass if possible) |
1 | 956 |
ClassFieldMap* JvmtiCachedClassFieldMap::get_map_of_instance_fields(oop obj) { |
957 |
assert(Thread::current()->is_VM_thread(), "must be VMThread"); |
|
958 |
assert(ClassFieldMapCacheMark::is_active(), "ClassFieldMapCacheMark not active"); |
|
959 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
960 |
Klass* k = obj->klass(); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
961 |
InstanceKlass* ik = InstanceKlass::cast(k); |
1 | 962 |
|
963 |
// return cached map if possible |
|
964 |
JvmtiCachedClassFieldMap* cached_map = ik->jvmti_cached_class_field_map(); |
|
965 |
if (cached_map != NULL) { |
|
966 |
assert(cached_map->field_map() != NULL, "missing field list"); |
|
967 |
return cached_map->field_map(); |
|
968 |
} else { |
|
969 |
ClassFieldMap* field_map = ClassFieldMap::create_map_of_instance_fields(obj); |
|
970 |
cached_map = new JvmtiCachedClassFieldMap(field_map); |
|
971 |
ik->set_jvmti_cached_class_field_map(cached_map); |
|
972 |
add_to_class_list(ik); |
|
973 |
return field_map; |
|
974 |
} |
|
975 |
} |
|
976 |
||
977 |
// remove the fields maps cached from all instanceKlasses |
|
978 |
void JvmtiCachedClassFieldMap::clear_cache() { |
|
979 |
assert(Thread::current()->is_VM_thread(), "must be VMThread"); |
|
980 |
if (_class_list != NULL) { |
|
981 |
for (int i = 0; i < _class_list->length(); i++) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
982 |
InstanceKlass* ik = _class_list->at(i); |
1 | 983 |
JvmtiCachedClassFieldMap* cached_map = ik->jvmti_cached_class_field_map(); |
984 |
assert(cached_map != NULL, "should not be NULL"); |
|
985 |
ik->set_jvmti_cached_class_field_map(NULL); |
|
986 |
delete cached_map; // deletes the encapsulated field map |
|
987 |
} |
|
988 |
delete _class_list; |
|
989 |
_class_list = NULL; |
|
990 |
} |
|
991 |
} |
|
992 |
||
993 |
// returns the number of ClassFieldMap cached by instanceKlasses |
|
994 |
int JvmtiCachedClassFieldMap::cached_field_map_count() { |
|
995 |
return (_class_list == NULL) ? 0 : _class_list->length(); |
|
996 |
} |
|
997 |
||
998 |
// helper function to indicate if an object is filtered by its tag or class tag |
|
999 |
static inline bool is_filtered_by_heap_filter(jlong obj_tag, |
|
1000 |
jlong klass_tag, |
|
1001 |
int heap_filter) { |
|
1002 |
// apply the heap filter |
|
1003 |
if (obj_tag != 0) { |
|
1004 |
// filter out tagged objects |
|
1005 |
if (heap_filter & JVMTI_HEAP_FILTER_TAGGED) return true; |
|
1006 |
} else { |
|
1007 |
// filter out untagged objects |
|
1008 |
if (heap_filter & JVMTI_HEAP_FILTER_UNTAGGED) return true; |
|
1009 |
} |
|
1010 |
if (klass_tag != 0) { |
|
1011 |
// filter out objects with tagged classes |
|
1012 |
if (heap_filter & JVMTI_HEAP_FILTER_CLASS_TAGGED) return true; |
|
1013 |
} else { |
|
1014 |
// filter out objects with untagged classes. |
|
1015 |
if (heap_filter & JVMTI_HEAP_FILTER_CLASS_UNTAGGED) return true; |
|
1016 |
} |
|
1017 |
return false; |
|
1018 |
} |
|
1019 |
||
1020 |
// helper function to indicate if an object is filtered by a klass filter |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1021 |
static inline bool is_filtered_by_klass_filter(oop obj, Klass* klass_filter) { |
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1022 |
if (klass_filter != NULL) { |
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1023 |
if (obj->klass() != klass_filter) { |
1 | 1024 |
return true; |
1025 |
} |
|
1026 |
} |
|
1027 |
return false; |
|
1028 |
} |
|
1029 |
||
1030 |
// helper function to tell if a field is a primitive field or not |
|
1031 |
static inline bool is_primitive_field_type(char type) { |
|
1032 |
return (type != 'L' && type != '['); |
|
1033 |
} |
|
1034 |
||
1035 |
// helper function to copy the value from location addr to jvalue. |
|
1036 |
static inline void copy_to_jvalue(jvalue *v, address addr, jvmtiPrimitiveType value_type) { |
|
1037 |
switch (value_type) { |
|
1038 |
case JVMTI_PRIMITIVE_TYPE_BOOLEAN : { v->z = *(jboolean*)addr; break; } |
|
1039 |
case JVMTI_PRIMITIVE_TYPE_BYTE : { v->b = *(jbyte*)addr; break; } |
|
1040 |
case JVMTI_PRIMITIVE_TYPE_CHAR : { v->c = *(jchar*)addr; break; } |
|
1041 |
case JVMTI_PRIMITIVE_TYPE_SHORT : { v->s = *(jshort*)addr; break; } |
|
1042 |
case JVMTI_PRIMITIVE_TYPE_INT : { v->i = *(jint*)addr; break; } |
|
1043 |
case JVMTI_PRIMITIVE_TYPE_LONG : { v->j = *(jlong*)addr; break; } |
|
1044 |
case JVMTI_PRIMITIVE_TYPE_FLOAT : { v->f = *(jfloat*)addr; break; } |
|
1045 |
case JVMTI_PRIMITIVE_TYPE_DOUBLE : { v->d = *(jdouble*)addr; break; } |
|
1046 |
default: ShouldNotReachHere(); |
|
1047 |
} |
|
1048 |
} |
|
1049 |
||
1050 |
// helper function to invoke string primitive value callback |
|
1051 |
// returns visit control flags |
|
1052 |
static jint invoke_string_value_callback(jvmtiStringPrimitiveValueCallback cb, |
|
1053 |
CallbackWrapper* wrapper, |
|
1054 |
oop str, |
|
1055 |
void* user_data) |
|
1056 |
{ |
|
4571 | 1057 |
assert(str->klass() == SystemDictionary::String_klass(), "not a string"); |
1 | 1058 |
|
28624
88972fd01f71
6584008: jvmtiStringPrimitiveCallback should not be invoked when string value is null
aph
parents:
25716
diff
changeset
|
1059 |
typeArrayOop s_value = java_lang_String::value(str); |
88972fd01f71
6584008: jvmtiStringPrimitiveCallback should not be invoked when string value is null
aph
parents:
25716
diff
changeset
|
1060 |
|
88972fd01f71
6584008: jvmtiStringPrimitiveCallback should not be invoked when string value is null
aph
parents:
25716
diff
changeset
|
1061 |
// JDK-6584008: the value field may be null if a String instance is |
88972fd01f71
6584008: jvmtiStringPrimitiveCallback should not be invoked when string value is null
aph
parents:
25716
diff
changeset
|
1062 |
// partially constructed. |
88972fd01f71
6584008: jvmtiStringPrimitiveCallback should not be invoked when string value is null
aph
parents:
25716
diff
changeset
|
1063 |
if (s_value == NULL) { |
88972fd01f71
6584008: jvmtiStringPrimitiveCallback should not be invoked when string value is null
aph
parents:
25716
diff
changeset
|
1064 |
return 0; |
88972fd01f71
6584008: jvmtiStringPrimitiveCallback should not be invoked when string value is null
aph
parents:
25716
diff
changeset
|
1065 |
} |
1 | 1066 |
// get the string value and length |
1067 |
// (string value may be offset from the base) |
|
1068 |
int s_len = java_lang_String::length(str); |
|
33628 | 1069 |
bool is_latin1 = java_lang_String::is_latin1(str); |
1 | 1070 |
jchar* value; |
1071 |
if (s_len > 0) { |
|
33628 | 1072 |
if (!is_latin1) { |
1073 |
value = s_value->char_at_addr(0); |
|
1074 |
} else { |
|
1075 |
// Inflate latin1 encoded string to UTF16 |
|
1076 |
jchar* buf = NEW_C_HEAP_ARRAY(jchar, s_len, mtInternal); |
|
1077 |
for (int i = 0; i < s_len; i++) { |
|
1078 |
buf[i] = ((jchar) s_value->byte_at(i)) & 0xff; |
|
1079 |
} |
|
1080 |
value = &buf[0]; |
|
1081 |
} |
|
1 | 1082 |
} else { |
33628 | 1083 |
// Don't use char_at_addr(0) if length is 0 |
1 | 1084 |
value = (jchar*) s_value->base(T_CHAR); |
1085 |
} |
|
1086 |
||
1087 |
// invoke the callback |
|
33628 | 1088 |
jint res = (*cb)(wrapper->klass_tag(), |
1089 |
wrapper->obj_size(), |
|
1090 |
wrapper->obj_tag_p(), |
|
1091 |
value, |
|
1092 |
(jint)s_len, |
|
1093 |
user_data); |
|
1094 |
||
1095 |
if (is_latin1 && s_len > 0) { |
|
1096 |
FREE_C_HEAP_ARRAY(jchar, value); |
|
1097 |
} |
|
1098 |
return res; |
|
1 | 1099 |
} |
1100 |
||
1101 |
// helper function to invoke string primitive value callback |
|
1102 |
// returns visit control flags |
|
1103 |
static jint invoke_array_primitive_value_callback(jvmtiArrayPrimitiveValueCallback cb, |
|
1104 |
CallbackWrapper* wrapper, |
|
1105 |
oop obj, |
|
1106 |
void* user_data) |
|
1107 |
{ |
|
1108 |
assert(obj->is_typeArray(), "not a primitive array"); |
|
1109 |
||
1110 |
// get base address of first element |
|
1111 |
typeArrayOop array = typeArrayOop(obj); |
|
13952
e3cf184080bc
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents:
13741
diff
changeset
|
1112 |
BasicType type = TypeArrayKlass::cast(array->klass())->element_type(); |
1 | 1113 |
void* elements = array->base(type); |
1114 |
||
1115 |
// jvmtiPrimitiveType is defined so this mapping is always correct |
|
1116 |
jvmtiPrimitiveType elem_type = (jvmtiPrimitiveType)type2char(type); |
|
1117 |
||
1118 |
return (*cb)(wrapper->klass_tag(), |
|
1119 |
wrapper->obj_size(), |
|
1120 |
wrapper->obj_tag_p(), |
|
1121 |
(jint)array->length(), |
|
1122 |
elem_type, |
|
1123 |
elements, |
|
1124 |
user_data); |
|
1125 |
} |
|
1126 |
||
1127 |
// helper function to invoke the primitive field callback for all static fields |
|
1128 |
// of a given class |
|
1129 |
static jint invoke_primitive_field_callback_for_static_fields |
|
1130 |
(CallbackWrapper* wrapper, |
|
1131 |
oop obj, |
|
1132 |
jvmtiPrimitiveFieldCallback cb, |
|
1133 |
void* user_data) |
|
1134 |
{ |
|
1135 |
// for static fields only the index will be set |
|
1136 |
static jvmtiHeapReferenceInfo reference_info = { 0 }; |
|
1137 |
||
4571 | 1138 |
assert(obj->klass() == SystemDictionary::Class_klass(), "not a class"); |
1 | 1139 |
if (java_lang_Class::is_primitive(obj)) { |
1140 |
return 0; |
|
1141 |
} |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
1142 |
Klass* klass = java_lang_Class::as_Klass(obj); |
1 | 1143 |
|
1144 |
// ignore classes for object and type arrays |
|
33611
9abd65805e19
8139203: Consistent naming for klass type predicates
coleenp
parents:
33602
diff
changeset
|
1145 |
if (!klass->is_instance_klass()) { |
1 | 1146 |
return 0; |
1147 |
} |
|
1148 |
||
1149 |
// ignore classes which aren't linked yet |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
1150 |
InstanceKlass* ik = InstanceKlass::cast(klass); |
1 | 1151 |
if (!ik->is_linked()) { |
1152 |
return 0; |
|
1153 |
} |
|
1154 |
||
1155 |
// get the field map |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
1156 |
ClassFieldMap* field_map = ClassFieldMap::create_map_of_static_fields(klass); |
1 | 1157 |
|
1158 |
// invoke the callback for each static primitive field |
|
1159 |
for (int i=0; i<field_map->field_count(); i++) { |
|
1160 |
ClassFieldDescriptor* field = field_map->field_at(i); |
|
1161 |
||
1162 |
// ignore non-primitive fields |
|
1163 |
char type = field->field_type(); |
|
1164 |
if (!is_primitive_field_type(type)) { |
|
1165 |
continue; |
|
1166 |
} |
|
1167 |
// one-to-one mapping |
|
1168 |
jvmtiPrimitiveType value_type = (jvmtiPrimitiveType)type; |
|
1169 |
||
1170 |
// get offset and field value |
|
1171 |
int offset = field->field_offset(); |
|
14082
7425bbf64ead
7093328: JVMTI: jvmtiPrimitiveFieldCallback always report 0's for static primitives
rbackman
parents:
13977
diff
changeset
|
1172 |
address addr = (address)klass->java_mirror() + offset; |
1 | 1173 |
jvalue value; |
1174 |
copy_to_jvalue(&value, addr, value_type); |
|
1175 |
||
1176 |
// field index |
|
1177 |
reference_info.field.index = field->field_index(); |
|
1178 |
||
1179 |
// invoke the callback |
|
1180 |
jint res = (*cb)(JVMTI_HEAP_REFERENCE_STATIC_FIELD, |
|
1181 |
&reference_info, |
|
1182 |
wrapper->klass_tag(), |
|
1183 |
wrapper->obj_tag_p(), |
|
1184 |
value, |
|
1185 |
value_type, |
|
1186 |
user_data); |
|
1187 |
if (res & JVMTI_VISIT_ABORT) { |
|
1188 |
delete field_map; |
|
1189 |
return res; |
|
1190 |
} |
|
1191 |
} |
|
1192 |
||
1193 |
delete field_map; |
|
1194 |
return 0; |
|
1195 |
} |
|
1196 |
||
1197 |
// helper function to invoke the primitive field callback for all instance fields |
|
1198 |
// of a given object |
|
1199 |
static jint invoke_primitive_field_callback_for_instance_fields( |
|
1200 |
CallbackWrapper* wrapper, |
|
1201 |
oop obj, |
|
1202 |
jvmtiPrimitiveFieldCallback cb, |
|
1203 |
void* user_data) |
|
1204 |
{ |
|
1205 |
// for instance fields only the index will be set |
|
1206 |
static jvmtiHeapReferenceInfo reference_info = { 0 }; |
|
1207 |
||
1208 |
// get the map of the instance fields |
|
1209 |
ClassFieldMap* fields = JvmtiCachedClassFieldMap::get_map_of_instance_fields(obj); |
|
1210 |
||
1211 |
// invoke the callback for each instance primitive field |
|
1212 |
for (int i=0; i<fields->field_count(); i++) { |
|
1213 |
ClassFieldDescriptor* field = fields->field_at(i); |
|
1214 |
||
1215 |
// ignore non-primitive fields |
|
1216 |
char type = field->field_type(); |
|
1217 |
if (!is_primitive_field_type(type)) { |
|
1218 |
continue; |
|
1219 |
} |
|
1220 |
// one-to-one mapping |
|
1221 |
jvmtiPrimitiveType value_type = (jvmtiPrimitiveType)type; |
|
1222 |
||
1223 |
// get offset and field value |
|
1224 |
int offset = field->field_offset(); |
|
1225 |
address addr = (address)obj + offset; |
|
1226 |
jvalue value; |
|
1227 |
copy_to_jvalue(&value, addr, value_type); |
|
1228 |
||
1229 |
// field index |
|
1230 |
reference_info.field.index = field->field_index(); |
|
1231 |
||
1232 |
// invoke the callback |
|
1233 |
jint res = (*cb)(JVMTI_HEAP_REFERENCE_FIELD, |
|
1234 |
&reference_info, |
|
1235 |
wrapper->klass_tag(), |
|
1236 |
wrapper->obj_tag_p(), |
|
1237 |
value, |
|
1238 |
value_type, |
|
1239 |
user_data); |
|
1240 |
if (res & JVMTI_VISIT_ABORT) { |
|
1241 |
return res; |
|
1242 |
} |
|
1243 |
} |
|
1244 |
return 0; |
|
1245 |
} |
|
1246 |
||
1247 |
||
1248 |
// VM operation to iterate over all objects in the heap (both reachable |
|
1249 |
// and unreachable) |
|
1250 |
class VM_HeapIterateOperation: public VM_Operation { |
|
1251 |
private: |
|
1252 |
ObjectClosure* _blk; |
|
1253 |
public: |
|
1254 |
VM_HeapIterateOperation(ObjectClosure* blk) { _blk = blk; } |
|
1255 |
||
1256 |
VMOp_Type type() const { return VMOp_HeapIterateOperation; } |
|
1257 |
void doit() { |
|
1258 |
// allows class files maps to be cached during iteration |
|
1259 |
ClassFieldMapCacheMark cm; |
|
1260 |
||
1261 |
// make sure that heap is parsable (fills TLABs with filler objects) |
|
1262 |
Universe::heap()->ensure_parsability(false); // no need to retire TLABs |
|
1263 |
||
1264 |
// Verify heap before iteration - if the heap gets corrupted then |
|
1265 |
// JVMTI's IterateOverHeap will crash. |
|
1266 |
if (VerifyBeforeIteration) { |
|
1267 |
Universe::verify(); |
|
1268 |
} |
|
1269 |
||
1270 |
// do the iteration |
|
1893
c82e388e17c5
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
1388
diff
changeset
|
1271 |
// If this operation encounters a bad object when using CMS, |
c82e388e17c5
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
1388
diff
changeset
|
1272 |
// consider using safe_object_iterate() which avoids perm gen |
c82e388e17c5
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
1388
diff
changeset
|
1273 |
// objects that may contain bad references. |
1 | 1274 |
Universe::heap()->object_iterate(_blk); |
1275 |
} |
|
1276 |
||
1277 |
}; |
|
1278 |
||
1279 |
||
1280 |
// An ObjectClosure used to support the deprecated IterateOverHeap and |
|
1281 |
// IterateOverInstancesOfClass functions |
|
1282 |
class IterateOverHeapObjectClosure: public ObjectClosure { |
|
1283 |
private: |
|
1284 |
JvmtiTagMap* _tag_map; |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1285 |
Klass* _klass; |
1 | 1286 |
jvmtiHeapObjectFilter _object_filter; |
1287 |
jvmtiHeapObjectCallback _heap_object_callback; |
|
1288 |
const void* _user_data; |
|
1289 |
||
1290 |
// accessors |
|
1291 |
JvmtiTagMap* tag_map() const { return _tag_map; } |
|
1292 |
jvmtiHeapObjectFilter object_filter() const { return _object_filter; } |
|
1293 |
jvmtiHeapObjectCallback object_callback() const { return _heap_object_callback; } |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1294 |
Klass* klass() const { return _klass; } |
1 | 1295 |
const void* user_data() const { return _user_data; } |
1296 |
||
1297 |
// indicates if iteration has been aborted |
|
1298 |
bool _iteration_aborted; |
|
1299 |
bool is_iteration_aborted() const { return _iteration_aborted; } |
|
1300 |
void set_iteration_aborted(bool aborted) { _iteration_aborted = aborted; } |
|
1301 |
||
1302 |
public: |
|
1303 |
IterateOverHeapObjectClosure(JvmtiTagMap* tag_map, |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1304 |
Klass* klass, |
1 | 1305 |
jvmtiHeapObjectFilter object_filter, |
1306 |
jvmtiHeapObjectCallback heap_object_callback, |
|
1307 |
const void* user_data) : |
|
1308 |
_tag_map(tag_map), |
|
1309 |
_klass(klass), |
|
1310 |
_object_filter(object_filter), |
|
1311 |
_heap_object_callback(heap_object_callback), |
|
1312 |
_user_data(user_data), |
|
1313 |
_iteration_aborted(false) |
|
1314 |
{ |
|
1315 |
} |
|
1316 |
||
1317 |
void do_object(oop o); |
|
1318 |
}; |
|
1319 |
||
1320 |
// invoked for each object in the heap |
|
1321 |
void IterateOverHeapObjectClosure::do_object(oop o) { |
|
1322 |
// check if iteration has been halted |
|
1323 |
if (is_iteration_aborted()) return; |
|
1324 |
||
1325 |
// ignore any objects that aren't visible to profiler |
|
1326 |
if (!ServiceUtil::visible_oop(o)) return; |
|
1327 |
||
1328 |
// instanceof check when filtering by klass |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1329 |
if (klass() != NULL && !o->is_a(klass())) { |
1 | 1330 |
return; |
1331 |
} |
|
1332 |
// prepare for the calllback |
|
1333 |
CallbackWrapper wrapper(tag_map(), o); |
|
1334 |
||
1335 |
// if the object is tagged and we're only interested in untagged objects |
|
1336 |
// then don't invoke the callback. Similiarly, if the object is untagged |
|
1337 |
// and we're only interested in tagged objects we skip the callback. |
|
1338 |
if (wrapper.obj_tag() != 0) { |
|
1339 |
if (object_filter() == JVMTI_HEAP_OBJECT_UNTAGGED) return; |
|
1340 |
} else { |
|
1341 |
if (object_filter() == JVMTI_HEAP_OBJECT_TAGGED) return; |
|
1342 |
} |
|
1343 |
||
1344 |
// invoke the agent's callback |
|
1345 |
jvmtiIterationControl control = (*object_callback())(wrapper.klass_tag(), |
|
1346 |
wrapper.obj_size(), |
|
1347 |
wrapper.obj_tag_p(), |
|
1348 |
(void*)user_data()); |
|
1349 |
if (control == JVMTI_ITERATION_ABORT) { |
|
1350 |
set_iteration_aborted(true); |
|
1351 |
} |
|
1352 |
} |
|
1353 |
||
1354 |
// An ObjectClosure used to support the IterateThroughHeap function |
|
1355 |
class IterateThroughHeapObjectClosure: public ObjectClosure { |
|
1356 |
private: |
|
1357 |
JvmtiTagMap* _tag_map; |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1358 |
Klass* _klass; |
1 | 1359 |
int _heap_filter; |
1360 |
const jvmtiHeapCallbacks* _callbacks; |
|
1361 |
const void* _user_data; |
|
1362 |
||
1363 |
// accessor functions |
|
1364 |
JvmtiTagMap* tag_map() const { return _tag_map; } |
|
1365 |
int heap_filter() const { return _heap_filter; } |
|
1366 |
const jvmtiHeapCallbacks* callbacks() const { return _callbacks; } |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1367 |
Klass* klass() const { return _klass; } |
1 | 1368 |
const void* user_data() const { return _user_data; } |
1369 |
||
1370 |
// indicates if the iteration has been aborted |
|
1371 |
bool _iteration_aborted; |
|
1372 |
bool is_iteration_aborted() const { return _iteration_aborted; } |
|
1373 |
||
1374 |
// used to check the visit control flags. If the abort flag is set |
|
1375 |
// then we set the iteration aborted flag so that the iteration completes |
|
1376 |
// without processing any further objects |
|
1377 |
bool check_flags_for_abort(jint flags) { |
|
1378 |
bool is_abort = (flags & JVMTI_VISIT_ABORT) != 0; |
|
1379 |
if (is_abort) { |
|
1380 |
_iteration_aborted = true; |
|
1381 |
} |
|
1382 |
return is_abort; |
|
1383 |
} |
|
1384 |
||
1385 |
public: |
|
1386 |
IterateThroughHeapObjectClosure(JvmtiTagMap* tag_map, |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1387 |
Klass* klass, |
1 | 1388 |
int heap_filter, |
1389 |
const jvmtiHeapCallbacks* heap_callbacks, |
|
1390 |
const void* user_data) : |
|
1391 |
_tag_map(tag_map), |
|
1392 |
_klass(klass), |
|
1393 |
_heap_filter(heap_filter), |
|
1394 |
_callbacks(heap_callbacks), |
|
1395 |
_user_data(user_data), |
|
1396 |
_iteration_aborted(false) |
|
1397 |
{ |
|
1398 |
} |
|
1399 |
||
1400 |
void do_object(oop o); |
|
1401 |
}; |
|
1402 |
||
1403 |
// invoked for each object in the heap |
|
1404 |
void IterateThroughHeapObjectClosure::do_object(oop obj) { |
|
1405 |
// check if iteration has been halted |
|
1406 |
if (is_iteration_aborted()) return; |
|
1407 |
||
1408 |
// ignore any objects that aren't visible to profiler |
|
1409 |
if (!ServiceUtil::visible_oop(obj)) return; |
|
1410 |
||
1411 |
// apply class filter |
|
1412 |
if (is_filtered_by_klass_filter(obj, klass())) return; |
|
1413 |
||
1414 |
// prepare for callback |
|
1415 |
CallbackWrapper wrapper(tag_map(), obj); |
|
1416 |
||
1417 |
// check if filtered by the heap filter |
|
1418 |
if (is_filtered_by_heap_filter(wrapper.obj_tag(), wrapper.klass_tag(), heap_filter())) { |
|
1419 |
return; |
|
1420 |
} |
|
1421 |
||
1422 |
// for arrays we need the length, otherwise -1 |
|
1423 |
bool is_array = obj->is_array(); |
|
1424 |
int len = is_array ? arrayOop(obj)->length() : -1; |
|
1425 |
||
1426 |
// invoke the object callback (if callback is provided) |
|
1427 |
if (callbacks()->heap_iteration_callback != NULL) { |
|
1428 |
jvmtiHeapIterationCallback cb = callbacks()->heap_iteration_callback; |
|
1429 |
jint res = (*cb)(wrapper.klass_tag(), |
|
1430 |
wrapper.obj_size(), |
|
1431 |
wrapper.obj_tag_p(), |
|
1432 |
(jint)len, |
|
1433 |
(void*)user_data()); |
|
1434 |
if (check_flags_for_abort(res)) return; |
|
1435 |
} |
|
1436 |
||
1437 |
// for objects and classes we report primitive fields if callback provided |
|
1438 |
if (callbacks()->primitive_field_callback != NULL && obj->is_instance()) { |
|
1439 |
jint res; |
|
1440 |
jvmtiPrimitiveFieldCallback cb = callbacks()->primitive_field_callback; |
|
4571 | 1441 |
if (obj->klass() == SystemDictionary::Class_klass()) { |
1 | 1442 |
res = invoke_primitive_field_callback_for_static_fields(&wrapper, |
1443 |
obj, |
|
1444 |
cb, |
|
1445 |
(void*)user_data()); |
|
1446 |
} else { |
|
1447 |
res = invoke_primitive_field_callback_for_instance_fields(&wrapper, |
|
1448 |
obj, |
|
1449 |
cb, |
|
1450 |
(void*)user_data()); |
|
1451 |
} |
|
1452 |
if (check_flags_for_abort(res)) return; |
|
1453 |
} |
|
1454 |
||
1455 |
// string callback |
|
1456 |
if (!is_array && |
|
1457 |
callbacks()->string_primitive_value_callback != NULL && |
|
4571 | 1458 |
obj->klass() == SystemDictionary::String_klass()) { |
1 | 1459 |
jint res = invoke_string_value_callback( |
1460 |
callbacks()->string_primitive_value_callback, |
|
1461 |
&wrapper, |
|
1462 |
obj, |
|
1463 |
(void*)user_data() ); |
|
1464 |
if (check_flags_for_abort(res)) return; |
|
1465 |
} |
|
1466 |
||
1467 |
// array callback |
|
1468 |
if (is_array && |
|
1469 |
callbacks()->array_primitive_value_callback != NULL && |
|
1470 |
obj->is_typeArray()) { |
|
1471 |
jint res = invoke_array_primitive_value_callback( |
|
1472 |
callbacks()->array_primitive_value_callback, |
|
1473 |
&wrapper, |
|
1474 |
obj, |
|
1475 |
(void*)user_data() ); |
|
1476 |
if (check_flags_for_abort(res)) return; |
|
1477 |
} |
|
1478 |
}; |
|
1479 |
||
1480 |
||
1481 |
// Deprecated function to iterate over all objects in the heap |
|
1482 |
void JvmtiTagMap::iterate_over_heap(jvmtiHeapObjectFilter object_filter, |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1483 |
Klass* klass, |
1 | 1484 |
jvmtiHeapObjectCallback heap_object_callback, |
1485 |
const void* user_data) |
|
1486 |
{ |
|
1487 |
MutexLocker ml(Heap_lock); |
|
1488 |
IterateOverHeapObjectClosure blk(this, |
|
1489 |
klass, |
|
1490 |
object_filter, |
|
1491 |
heap_object_callback, |
|
1492 |
user_data); |
|
1493 |
VM_HeapIterateOperation op(&blk); |
|
1494 |
VMThread::execute(&op); |
|
1495 |
} |
|
1496 |
||
1497 |
||
1498 |
// Iterates over all objects in the heap |
|
1499 |
void JvmtiTagMap::iterate_through_heap(jint heap_filter, |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1500 |
Klass* klass, |
1 | 1501 |
const jvmtiHeapCallbacks* callbacks, |
1502 |
const void* user_data) |
|
1503 |
{ |
|
1504 |
MutexLocker ml(Heap_lock); |
|
1505 |
IterateThroughHeapObjectClosure blk(this, |
|
1506 |
klass, |
|
1507 |
heap_filter, |
|
1508 |
callbacks, |
|
1509 |
user_data); |
|
1510 |
VM_HeapIterateOperation op(&blk); |
|
1511 |
VMThread::execute(&op); |
|
1512 |
} |
|
1513 |
||
1514 |
// support class for get_objects_with_tags |
|
1515 |
||
1516 |
class TagObjectCollector : public JvmtiTagHashmapEntryClosure { |
|
1517 |
private: |
|
1518 |
JvmtiEnv* _env; |
|
1519 |
jlong* _tags; |
|
1520 |
jint _tag_count; |
|
1521 |
||
1522 |
GrowableArray<jobject>* _object_results; // collected objects (JNI weak refs) |
|
1523 |
GrowableArray<uint64_t>* _tag_results; // collected tags |
|
1524 |
||
1525 |
public: |
|
1526 |
TagObjectCollector(JvmtiEnv* env, const jlong* tags, jint tag_count) { |
|
1527 |
_env = env; |
|
1528 |
_tags = (jlong*)tags; |
|
1529 |
_tag_count = tag_count; |
|
13195 | 1530 |
_object_results = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jobject>(1,true); |
1531 |
_tag_results = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<uint64_t>(1,true); |
|
1 | 1532 |
} |
1533 |
||
1534 |
~TagObjectCollector() { |
|
1535 |
delete _object_results; |
|
1536 |
delete _tag_results; |
|
1537 |
} |
|
1538 |
||
1539 |
// for each tagged object check if the tag value matches |
|
1540 |
// - if it matches then we create a JNI local reference to the object |
|
1541 |
// and record the reference and tag value. |
|
1542 |
// |
|
1543 |
void do_entry(JvmtiTagHashmapEntry* entry) { |
|
1544 |
for (int i=0; i<_tag_count; i++) { |
|
1545 |
if (_tags[i] == entry->tag()) { |
|
48616
80239a242d34
8191894: Refactor weak references in JvmtiTagHashmap to use the Access API
eosterlund
parents:
48105
diff
changeset
|
1546 |
// The reference in this tag map could be the only (implicitly weak) |
80239a242d34
8191894: Refactor weak references in JvmtiTagHashmap to use the Access API
eosterlund
parents:
48105
diff
changeset
|
1547 |
// reference to that object. If we hand it out, we need to keep it live wrt |
80239a242d34
8191894: Refactor weak references in JvmtiTagHashmap to use the Access API
eosterlund
parents:
48105
diff
changeset
|
1548 |
// SATB marking similar to other j.l.ref.Reference referents. This is |
80239a242d34
8191894: Refactor weak references in JvmtiTagHashmap to use the Access API
eosterlund
parents:
48105
diff
changeset
|
1549 |
// achieved by using a phantom load in the object() accessor. |
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
1550 |
oop o = entry->object(); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
1551 |
assert(o != NULL && Universe::heap()->is_in_reserved(o), "sanity check"); |
1 | 1552 |
jobject ref = JNIHandles::make_local(JavaThread::current(), o); |
1553 |
_object_results->append(ref); |
|
1554 |
_tag_results->append((uint64_t)entry->tag()); |
|
1555 |
} |
|
1556 |
} |
|
1557 |
} |
|
1558 |
||
1559 |
// return the results from the collection |
|
1560 |
// |
|
1561 |
jvmtiError result(jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) { |
|
1562 |
jvmtiError error; |
|
1563 |
int count = _object_results->length(); |
|
1564 |
assert(count >= 0, "sanity check"); |
|
1565 |
||
1566 |
// if object_result_ptr is not NULL then allocate the result and copy |
|
1567 |
// in the object references. |
|
1568 |
if (object_result_ptr != NULL) { |
|
1569 |
error = _env->Allocate(count * sizeof(jobject), (unsigned char**)object_result_ptr); |
|
1570 |
if (error != JVMTI_ERROR_NONE) { |
|
1571 |
return error; |
|
1572 |
} |
|
1573 |
for (int i=0; i<count; i++) { |
|
1574 |
(*object_result_ptr)[i] = _object_results->at(i); |
|
1575 |
} |
|
1576 |
} |
|
1577 |
||
1578 |
// if tag_result_ptr is not NULL then allocate the result and copy |
|
1579 |
// in the tag values. |
|
1580 |
if (tag_result_ptr != NULL) { |
|
1581 |
error = _env->Allocate(count * sizeof(jlong), (unsigned char**)tag_result_ptr); |
|
1582 |
if (error != JVMTI_ERROR_NONE) { |
|
1583 |
if (object_result_ptr != NULL) { |
|
1584 |
_env->Deallocate((unsigned char*)object_result_ptr); |
|
1585 |
} |
|
1586 |
return error; |
|
1587 |
} |
|
1588 |
for (int i=0; i<count; i++) { |
|
1589 |
(*tag_result_ptr)[i] = (jlong)_tag_results->at(i); |
|
1590 |
} |
|
1591 |
} |
|
1592 |
||
1593 |
*count_ptr = count; |
|
1594 |
return JVMTI_ERROR_NONE; |
|
1595 |
} |
|
1596 |
}; |
|
1597 |
||
1598 |
// return the list of objects with the specified tags |
|
1599 |
jvmtiError JvmtiTagMap::get_objects_with_tags(const jlong* tags, |
|
1600 |
jint count, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) { |
|
1601 |
||
1602 |
TagObjectCollector collector(env(), tags, count); |
|
1603 |
{ |
|
1604 |
// iterate over all tagged objects |
|
1605 |
MutexLocker ml(lock()); |
|
1606 |
entry_iterate(&collector); |
|
1607 |
} |
|
1608 |
return collector.result(count_ptr, object_result_ptr, tag_result_ptr); |
|
1609 |
} |
|
1610 |
||
1611 |
||
1612 |
// ObjectMarker is used to support the marking objects when walking the |
|
1613 |
// heap. |
|
1614 |
// |
|
1615 |
// This implementation uses the existing mark bits in an object for |
|
1616 |
// marking. Objects that are marked must later have their headers restored. |
|
1617 |
// As most objects are unlocked and don't have their identity hash computed |
|
1618 |
// we don't have to save their headers. Instead we save the headers that |
|
1619 |
// are "interesting". Later when the headers are restored this implementation |
|
1620 |
// restores all headers to their initial value and then restores the few |
|
1621 |
// objects that had interesting headers. |
|
1622 |
// |
|
1623 |
// Future work: This implementation currently uses growable arrays to save |
|
1624 |
// the oop and header of interesting objects. As an optimization we could |
|
1625 |
// use the same technique as the GC and make use of the unused area |
|
1626 |
// between top() and end(). |
|
1627 |
// |
|
1628 |
||
1629 |
// An ObjectClosure used to restore the mark bits of an object |
|
1630 |
class RestoreMarksClosure : public ObjectClosure { |
|
1631 |
public: |
|
1632 |
void do_object(oop o) { |
|
1633 |
if (o != NULL) { |
|
1634 |
markOop mark = o->mark(); |
|
1635 |
if (mark->is_marked()) { |
|
1636 |
o->init_mark(); |
|
1637 |
} |
|
1638 |
} |
|
1639 |
} |
|
1640 |
}; |
|
1641 |
||
1642 |
// ObjectMarker provides the mark and visited functions |
|
1643 |
class ObjectMarker : AllStatic { |
|
1644 |
private: |
|
1645 |
// saved headers |
|
1646 |
static GrowableArray<oop>* _saved_oop_stack; |
|
1647 |
static GrowableArray<markOop>* _saved_mark_stack; |
|
10228 | 1648 |
static bool _needs_reset; // do we need to reset mark bits? |
1 | 1649 |
|
1650 |
public: |
|
1651 |
static void init(); // initialize |
|
1652 |
static void done(); // clean-up |
|
1653 |
||
1654 |
static inline void mark(oop o); // mark an object |
|
1655 |
static inline bool visited(oop o); // check if object has been visited |
|
10228 | 1656 |
|
1657 |
static inline bool needs_reset() { return _needs_reset; } |
|
1658 |
static inline void set_needs_reset(bool v) { _needs_reset = v; } |
|
1 | 1659 |
}; |
1660 |
||
1661 |
GrowableArray<oop>* ObjectMarker::_saved_oop_stack = NULL; |
|
1662 |
GrowableArray<markOop>* ObjectMarker::_saved_mark_stack = NULL; |
|
10228 | 1663 |
bool ObjectMarker::_needs_reset = true; // need to reset mark bits by default |
1 | 1664 |
|
1665 |
// initialize ObjectMarker - prepares for object marking |
|
1666 |
void ObjectMarker::init() { |
|
1667 |
assert(Thread::current()->is_VM_thread(), "must be VMThread"); |
|
1668 |
||
1669 |
// prepare heap for iteration |
|
1670 |
Universe::heap()->ensure_parsability(false); // no need to retire TLABs |
|
1671 |
||
1672 |
// create stacks for interesting headers |
|
13195 | 1673 |
_saved_mark_stack = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<markOop>(4000, true); |
1674 |
_saved_oop_stack = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(4000, true); |
|
1 | 1675 |
|
1676 |
if (UseBiasedLocking) { |
|
1677 |
BiasedLocking::preserve_marks(); |
|
1678 |
} |
|
1679 |
} |
|
1680 |
||
1681 |
// Object marking is done so restore object headers |
|
1682 |
void ObjectMarker::done() { |
|
1683 |
// iterate over all objects and restore the mark bits to |
|
1684 |
// their initial value |
|
1685 |
RestoreMarksClosure blk; |
|
10228 | 1686 |
if (needs_reset()) { |
1687 |
Universe::heap()->object_iterate(&blk); |
|
1688 |
} else { |
|
1689 |
// We don't need to reset mark bits on this call, but reset the |
|
1690 |
// flag to the default for the next call. |
|
1691 |
set_needs_reset(true); |
|
1692 |
} |
|
1 | 1693 |
|
1694 |
// now restore the interesting headers |
|
1695 |
for (int i = 0; i < _saved_oop_stack->length(); i++) { |
|
1696 |
oop o = _saved_oop_stack->at(i); |
|
1697 |
markOop mark = _saved_mark_stack->at(i); |
|
1698 |
o->set_mark(mark); |
|
1699 |
} |
|
1700 |
||
1701 |
if (UseBiasedLocking) { |
|
1702 |
BiasedLocking::restore_marks(); |
|
1703 |
} |
|
1704 |
||
1705 |
// free the stacks |
|
1706 |
delete _saved_oop_stack; |
|
1707 |
delete _saved_mark_stack; |
|
1708 |
} |
|
1709 |
||
1710 |
// mark an object |
|
1711 |
inline void ObjectMarker::mark(oop o) { |
|
1712 |
assert(Universe::heap()->is_in(o), "sanity check"); |
|
1713 |
assert(!o->mark()->is_marked(), "should only mark an object once"); |
|
1714 |
||
1715 |
// object's mark word |
|
1716 |
markOop mark = o->mark(); |
|
1717 |
||
1718 |
if (mark->must_be_preserved(o)) { |
|
1719 |
_saved_mark_stack->push(mark); |
|
1720 |
_saved_oop_stack->push(o); |
|
1721 |
} |
|
1722 |
||
1723 |
// mark the object |
|
1724 |
o->set_mark(markOopDesc::prototype()->set_marked()); |
|
1725 |
} |
|
1726 |
||
1727 |
// return true if object is marked |
|
1728 |
inline bool ObjectMarker::visited(oop o) { |
|
1729 |
return o->mark()->is_marked(); |
|
1730 |
} |
|
1731 |
||
1732 |
// Stack allocated class to help ensure that ObjectMarker is used |
|
1733 |
// correctly. Constructor initializes ObjectMarker, destructor calls |
|
1734 |
// ObjectMarker's done() function to restore object headers. |
|
1735 |
class ObjectMarkerController : public StackObj { |
|
1736 |
public: |
|
1737 |
ObjectMarkerController() { |
|
1738 |
ObjectMarker::init(); |
|
1739 |
} |
|
1740 |
~ObjectMarkerController() { |
|
1741 |
ObjectMarker::done(); |
|
1742 |
} |
|
1743 |
}; |
|
1744 |
||
1745 |
||
1746 |
// helper to map a jvmtiHeapReferenceKind to an old style jvmtiHeapRootKind |
|
1747 |
// (not performance critical as only used for roots) |
|
1748 |
static jvmtiHeapRootKind toJvmtiHeapRootKind(jvmtiHeapReferenceKind kind) { |
|
1749 |
switch (kind) { |
|
1750 |
case JVMTI_HEAP_REFERENCE_JNI_GLOBAL: return JVMTI_HEAP_ROOT_JNI_GLOBAL; |
|
1751 |
case JVMTI_HEAP_REFERENCE_SYSTEM_CLASS: return JVMTI_HEAP_ROOT_SYSTEM_CLASS; |
|
1752 |
case JVMTI_HEAP_REFERENCE_MONITOR: return JVMTI_HEAP_ROOT_MONITOR; |
|
1753 |
case JVMTI_HEAP_REFERENCE_STACK_LOCAL: return JVMTI_HEAP_ROOT_STACK_LOCAL; |
|
1754 |
case JVMTI_HEAP_REFERENCE_JNI_LOCAL: return JVMTI_HEAP_ROOT_JNI_LOCAL; |
|
1755 |
case JVMTI_HEAP_REFERENCE_THREAD: return JVMTI_HEAP_ROOT_THREAD; |
|
1756 |
case JVMTI_HEAP_REFERENCE_OTHER: return JVMTI_HEAP_ROOT_OTHER; |
|
1757 |
default: ShouldNotReachHere(); return JVMTI_HEAP_ROOT_OTHER; |
|
1758 |
} |
|
1759 |
} |
|
1760 |
||
1761 |
// Base class for all heap walk contexts. The base class maintains a flag |
|
1762 |
// to indicate if the context is valid or not. |
|
1763 |
class HeapWalkContext VALUE_OBJ_CLASS_SPEC { |
|
1764 |
private: |
|
1765 |
bool _valid; |
|
1766 |
public: |
|
1767 |
HeapWalkContext(bool valid) { _valid = valid; } |
|
1768 |
void invalidate() { _valid = false; } |
|
1769 |
bool is_valid() const { return _valid; } |
|
1770 |
}; |
|
1771 |
||
1772 |
// A basic heap walk context for the deprecated heap walking functions. |
|
1773 |
// The context for a basic heap walk are the callbacks and fields used by |
|
1774 |
// the referrer caching scheme. |
|
1775 |
class BasicHeapWalkContext: public HeapWalkContext { |
|
1776 |
private: |
|
1777 |
jvmtiHeapRootCallback _heap_root_callback; |
|
1778 |
jvmtiStackReferenceCallback _stack_ref_callback; |
|
1779 |
jvmtiObjectReferenceCallback _object_ref_callback; |
|
1780 |
||
1781 |
// used for caching |
|
1782 |
oop _last_referrer; |
|
1783 |
jlong _last_referrer_tag; |
|
1784 |
||
1785 |
public: |
|
1786 |
BasicHeapWalkContext() : HeapWalkContext(false) { } |
|
1787 |
||
1788 |
BasicHeapWalkContext(jvmtiHeapRootCallback heap_root_callback, |
|
1789 |
jvmtiStackReferenceCallback stack_ref_callback, |
|
1790 |
jvmtiObjectReferenceCallback object_ref_callback) : |
|
1791 |
HeapWalkContext(true), |
|
1792 |
_heap_root_callback(heap_root_callback), |
|
1793 |
_stack_ref_callback(stack_ref_callback), |
|
1794 |
_object_ref_callback(object_ref_callback), |
|
1795 |
_last_referrer(NULL), |
|
1796 |
_last_referrer_tag(0) { |
|
1797 |
} |
|
1798 |
||
1799 |
// accessors |
|
1800 |
jvmtiHeapRootCallback heap_root_callback() const { return _heap_root_callback; } |
|
1801 |
jvmtiStackReferenceCallback stack_ref_callback() const { return _stack_ref_callback; } |
|
1802 |
jvmtiObjectReferenceCallback object_ref_callback() const { return _object_ref_callback; } |
|
1803 |
||
1804 |
oop last_referrer() const { return _last_referrer; } |
|
1805 |
void set_last_referrer(oop referrer) { _last_referrer = referrer; } |
|
1806 |
jlong last_referrer_tag() const { return _last_referrer_tag; } |
|
1807 |
void set_last_referrer_tag(jlong value) { _last_referrer_tag = value; } |
|
1808 |
}; |
|
1809 |
||
1810 |
// The advanced heap walk context for the FollowReferences functions. |
|
1811 |
// The context is the callbacks, and the fields used for filtering. |
|
1812 |
class AdvancedHeapWalkContext: public HeapWalkContext { |
|
1813 |
private: |
|
1814 |
jint _heap_filter; |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1815 |
Klass* _klass_filter; |
1 | 1816 |
const jvmtiHeapCallbacks* _heap_callbacks; |
1817 |
||
1818 |
public: |
|
1819 |
AdvancedHeapWalkContext() : HeapWalkContext(false) { } |
|
1820 |
||
1821 |
AdvancedHeapWalkContext(jint heap_filter, |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1822 |
Klass* klass_filter, |
1 | 1823 |
const jvmtiHeapCallbacks* heap_callbacks) : |
1824 |
HeapWalkContext(true), |
|
1825 |
_heap_filter(heap_filter), |
|
1826 |
_klass_filter(klass_filter), |
|
1827 |
_heap_callbacks(heap_callbacks) { |
|
1828 |
} |
|
1829 |
||
1830 |
// accessors |
|
1831 |
jint heap_filter() const { return _heap_filter; } |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
1832 |
Klass* klass_filter() const { return _klass_filter; } |
1 | 1833 |
|
1834 |
const jvmtiHeapReferenceCallback heap_reference_callback() const { |
|
1835 |
return _heap_callbacks->heap_reference_callback; |
|
1836 |
}; |
|
1837 |
const jvmtiPrimitiveFieldCallback primitive_field_callback() const { |
|
1838 |
return _heap_callbacks->primitive_field_callback; |
|
1839 |
} |
|
1840 |
const jvmtiArrayPrimitiveValueCallback array_primitive_value_callback() const { |
|
1841 |
return _heap_callbacks->array_primitive_value_callback; |
|
1842 |
} |
|
1843 |
const jvmtiStringPrimitiveValueCallback string_primitive_value_callback() const { |
|
1844 |
return _heap_callbacks->string_primitive_value_callback; |
|
1845 |
} |
|
1846 |
}; |
|
1847 |
||
1848 |
// The CallbackInvoker is a class with static functions that the heap walk can call |
|
1849 |
// into to invoke callbacks. It works in one of two modes. The "basic" mode is |
|
1850 |
// used for the deprecated IterateOverReachableObjects functions. The "advanced" |
|
1851 |
// mode is for the newer FollowReferences function which supports a lot of |
|
1852 |
// additional callbacks. |
|
1853 |
class CallbackInvoker : AllStatic { |
|
1854 |
private: |
|
1855 |
// heap walk styles |
|
1856 |
enum { basic, advanced }; |
|
1857 |
static int _heap_walk_type; |
|
1858 |
static bool is_basic_heap_walk() { return _heap_walk_type == basic; } |
|
1859 |
static bool is_advanced_heap_walk() { return _heap_walk_type == advanced; } |
|
1860 |
||
1861 |
// context for basic style heap walk |
|
1862 |
static BasicHeapWalkContext _basic_context; |
|
1863 |
static BasicHeapWalkContext* basic_context() { |
|
1864 |
assert(_basic_context.is_valid(), "invalid"); |
|
1865 |
return &_basic_context; |
|
1866 |
} |
|
1867 |
||
1868 |
// context for advanced style heap walk |
|
1869 |
static AdvancedHeapWalkContext _advanced_context; |
|
1870 |
static AdvancedHeapWalkContext* advanced_context() { |
|
1871 |
assert(_advanced_context.is_valid(), "invalid"); |
|
1872 |
return &_advanced_context; |
|
1873 |
} |
|
1874 |
||
1875 |
// context needed for all heap walks |
|
1876 |
static JvmtiTagMap* _tag_map; |
|
1877 |
static const void* _user_data; |
|
1878 |
static GrowableArray<oop>* _visit_stack; |
|
1879 |
||
1880 |
// accessors |
|
1881 |
static JvmtiTagMap* tag_map() { return _tag_map; } |
|
1882 |
static const void* user_data() { return _user_data; } |
|
1883 |
static GrowableArray<oop>* visit_stack() { return _visit_stack; } |
|
1884 |
||
1885 |
// if the object hasn't been visited then push it onto the visit stack |
|
1886 |
// so that it will be visited later |
|
1887 |
static inline bool check_for_visit(oop obj) { |
|
1888 |
if (!ObjectMarker::visited(obj)) visit_stack()->push(obj); |
|
1889 |
return true; |
|
1890 |
} |
|
1891 |
||
1892 |
// invoke basic style callbacks |
|
1893 |
static inline bool invoke_basic_heap_root_callback |
|
1894 |
(jvmtiHeapRootKind root_kind, oop obj); |
|
1895 |
static inline bool invoke_basic_stack_ref_callback |
|
1896 |
(jvmtiHeapRootKind root_kind, jlong thread_tag, jint depth, jmethodID method, |
|
1897 |
int slot, oop obj); |
|
1898 |
static inline bool invoke_basic_object_reference_callback |
|
1899 |
(jvmtiObjectReferenceKind ref_kind, oop referrer, oop referree, jint index); |
|
1900 |
||
1901 |
// invoke advanced style callbacks |
|
1902 |
static inline bool invoke_advanced_heap_root_callback |
|
1903 |
(jvmtiHeapReferenceKind ref_kind, oop obj); |
|
1904 |
static inline bool invoke_advanced_stack_ref_callback |
|
1905 |
(jvmtiHeapReferenceKind ref_kind, jlong thread_tag, jlong tid, int depth, |
|
1906 |
jmethodID method, jlocation bci, jint slot, oop obj); |
|
1907 |
static inline bool invoke_advanced_object_reference_callback |
|
1908 |
(jvmtiHeapReferenceKind ref_kind, oop referrer, oop referree, jint index); |
|
1909 |
||
1910 |
// used to report the value of primitive fields |
|
1911 |
static inline bool report_primitive_field |
|
1912 |
(jvmtiHeapReferenceKind ref_kind, oop obj, jint index, address addr, char type); |
|
1913 |
||
1914 |
public: |
|
1915 |
// initialize for basic mode |
|
1916 |
static void initialize_for_basic_heap_walk(JvmtiTagMap* tag_map, |
|
1917 |
GrowableArray<oop>* visit_stack, |
|
1918 |
const void* user_data, |
|
1919 |
BasicHeapWalkContext context); |
|
1920 |
||
1921 |
// initialize for advanced mode |
|
1922 |
static void initialize_for_advanced_heap_walk(JvmtiTagMap* tag_map, |
|
1923 |
GrowableArray<oop>* visit_stack, |
|
1924 |
const void* user_data, |
|
1925 |
AdvancedHeapWalkContext context); |
|
1926 |
||
1927 |
// functions to report roots |
|
1928 |
static inline bool report_simple_root(jvmtiHeapReferenceKind kind, oop o); |
|
1929 |
static inline bool report_jni_local_root(jlong thread_tag, jlong tid, jint depth, |
|
1930 |
jmethodID m, oop o); |
|
1931 |
static inline bool report_stack_ref_root(jlong thread_tag, jlong tid, jint depth, |
|
1932 |
jmethodID method, jlocation bci, jint slot, oop o); |
|
1933 |
||
1934 |
// functions to report references |
|
1935 |
static inline bool report_array_element_reference(oop referrer, oop referree, jint index); |
|
1936 |
static inline bool report_class_reference(oop referrer, oop referree); |
|
1937 |
static inline bool report_class_loader_reference(oop referrer, oop referree); |
|
1938 |
static inline bool report_signers_reference(oop referrer, oop referree); |
|
1939 |
static inline bool report_protection_domain_reference(oop referrer, oop referree); |
|
1940 |
static inline bool report_superclass_reference(oop referrer, oop referree); |
|
1941 |
static inline bool report_interface_reference(oop referrer, oop referree); |
|
1942 |
static inline bool report_static_field_reference(oop referrer, oop referree, jint slot); |
|
1943 |
static inline bool report_field_reference(oop referrer, oop referree, jint slot); |
|
1944 |
static inline bool report_constant_pool_reference(oop referrer, oop referree, jint index); |
|
1945 |
static inline bool report_primitive_array_values(oop array); |
|
1946 |
static inline bool report_string_value(oop str); |
|
1947 |
static inline bool report_primitive_instance_field(oop o, jint index, address value, char type); |
|
1948 |
static inline bool report_primitive_static_field(oop o, jint index, address value, char type); |
|
1949 |
}; |
|
1950 |
||
1951 |
// statics |
|
1952 |
int CallbackInvoker::_heap_walk_type; |
|
1953 |
BasicHeapWalkContext CallbackInvoker::_basic_context; |
|
1954 |
AdvancedHeapWalkContext CallbackInvoker::_advanced_context; |
|
1955 |
JvmtiTagMap* CallbackInvoker::_tag_map; |
|
1956 |
const void* CallbackInvoker::_user_data; |
|
1957 |
GrowableArray<oop>* CallbackInvoker::_visit_stack; |
|
1958 |
||
1959 |
// initialize for basic heap walk (IterateOverReachableObjects et al) |
|
1960 |
void CallbackInvoker::initialize_for_basic_heap_walk(JvmtiTagMap* tag_map, |
|
1961 |
GrowableArray<oop>* visit_stack, |
|
1962 |
const void* user_data, |
|
1963 |
BasicHeapWalkContext context) { |
|
1964 |
_tag_map = tag_map; |
|
1965 |
_visit_stack = visit_stack; |
|
1966 |
_user_data = user_data; |
|
1967 |
_basic_context = context; |
|
1968 |
_advanced_context.invalidate(); // will trigger assertion if used |
|
1969 |
_heap_walk_type = basic; |
|
1970 |
} |
|
1971 |
||
1972 |
// initialize for advanced heap walk (FollowReferences) |
|
1973 |
void CallbackInvoker::initialize_for_advanced_heap_walk(JvmtiTagMap* tag_map, |
|
1974 |
GrowableArray<oop>* visit_stack, |
|
1975 |
const void* user_data, |
|
1976 |
AdvancedHeapWalkContext context) { |
|
1977 |
_tag_map = tag_map; |
|
1978 |
_visit_stack = visit_stack; |
|
1979 |
_user_data = user_data; |
|
1980 |
_advanced_context = context; |
|
1981 |
_basic_context.invalidate(); // will trigger assertion if used |
|
1982 |
_heap_walk_type = advanced; |
|
1983 |
} |
|
1984 |
||
1985 |
||
1986 |
// invoke basic style heap root callback |
|
1987 |
inline bool CallbackInvoker::invoke_basic_heap_root_callback(jvmtiHeapRootKind root_kind, oop obj) { |
|
1988 |
assert(ServiceUtil::visible_oop(obj), "checking"); |
|
1989 |
||
1990 |
// if we heap roots should be reported |
|
1991 |
jvmtiHeapRootCallback cb = basic_context()->heap_root_callback(); |
|
1992 |
if (cb == NULL) { |
|
1993 |
return check_for_visit(obj); |
|
1994 |
} |
|
1995 |
||
1996 |
CallbackWrapper wrapper(tag_map(), obj); |
|
1997 |
jvmtiIterationControl control = (*cb)(root_kind, |
|
1998 |
wrapper.klass_tag(), |
|
1999 |
wrapper.obj_size(), |
|
2000 |
wrapper.obj_tag_p(), |
|
2001 |
(void*)user_data()); |
|
2002 |
// push root to visit stack when following references |
|
2003 |
if (control == JVMTI_ITERATION_CONTINUE && |
|
2004 |
basic_context()->object_ref_callback() != NULL) { |
|
2005 |
visit_stack()->push(obj); |
|
2006 |
} |
|
2007 |
return control != JVMTI_ITERATION_ABORT; |
|
2008 |
} |
|
2009 |
||
2010 |
// invoke basic style stack ref callback |
|
2011 |
inline bool CallbackInvoker::invoke_basic_stack_ref_callback(jvmtiHeapRootKind root_kind, |
|
2012 |
jlong thread_tag, |
|
2013 |
jint depth, |
|
2014 |
jmethodID method, |
|
47765
b7c7428eaab9
8189610: Reconcile jvm.h and all jvm_md.h between java.base and hotspot
coleenp
parents:
47580
diff
changeset
|
2015 |
int slot, |
1 | 2016 |
oop obj) { |
2017 |
assert(ServiceUtil::visible_oop(obj), "checking"); |
|
2018 |
||
2019 |
// if we stack refs should be reported |
|
2020 |
jvmtiStackReferenceCallback cb = basic_context()->stack_ref_callback(); |
|
2021 |
if (cb == NULL) { |
|
2022 |
return check_for_visit(obj); |
|
2023 |
} |
|
2024 |
||
2025 |
CallbackWrapper wrapper(tag_map(), obj); |
|
2026 |
jvmtiIterationControl control = (*cb)(root_kind, |
|
2027 |
wrapper.klass_tag(), |
|
2028 |
wrapper.obj_size(), |
|
2029 |
wrapper.obj_tag_p(), |
|
2030 |
thread_tag, |
|
2031 |
depth, |
|
2032 |
method, |
|
2033 |
slot, |
|
2034 |
(void*)user_data()); |
|
2035 |
// push root to visit stack when following references |
|
2036 |
if (control == JVMTI_ITERATION_CONTINUE && |
|
2037 |
basic_context()->object_ref_callback() != NULL) { |
|
2038 |
visit_stack()->push(obj); |
|
2039 |
} |
|
2040 |
return control != JVMTI_ITERATION_ABORT; |
|
2041 |
} |
|
2042 |
||
2043 |
// invoke basic style object reference callback |
|
2044 |
inline bool CallbackInvoker::invoke_basic_object_reference_callback(jvmtiObjectReferenceKind ref_kind, |
|
2045 |
oop referrer, |
|
2046 |
oop referree, |
|
2047 |
jint index) { |
|
2048 |
||
2049 |
assert(ServiceUtil::visible_oop(referrer), "checking"); |
|
2050 |
assert(ServiceUtil::visible_oop(referree), "checking"); |
|
2051 |
||
2052 |
BasicHeapWalkContext* context = basic_context(); |
|
2053 |
||
2054 |
// callback requires the referrer's tag. If it's the same referrer |
|
2055 |
// as the last call then we use the cached value. |
|
2056 |
jlong referrer_tag; |
|
2057 |
if (referrer == context->last_referrer()) { |
|
2058 |
referrer_tag = context->last_referrer_tag(); |
|
2059 |
} else { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
2060 |
referrer_tag = tag_for(tag_map(), referrer); |
1 | 2061 |
} |
2062 |
||
2063 |
// do the callback |
|
2064 |
CallbackWrapper wrapper(tag_map(), referree); |
|
2065 |
jvmtiObjectReferenceCallback cb = context->object_ref_callback(); |
|
2066 |
jvmtiIterationControl control = (*cb)(ref_kind, |
|
2067 |
wrapper.klass_tag(), |
|
2068 |
wrapper.obj_size(), |
|
2069 |
wrapper.obj_tag_p(), |
|
2070 |
referrer_tag, |
|
2071 |
index, |
|
2072 |
(void*)user_data()); |
|
2073 |
||
2074 |
// record referrer and referrer tag. For self-references record the |
|
2075 |
// tag value from the callback as this might differ from referrer_tag. |
|
2076 |
context->set_last_referrer(referrer); |
|
2077 |
if (referrer == referree) { |
|
2078 |
context->set_last_referrer_tag(*wrapper.obj_tag_p()); |
|
2079 |
} else { |
|
2080 |
context->set_last_referrer_tag(referrer_tag); |
|
2081 |
} |
|
2082 |
||
2083 |
if (control == JVMTI_ITERATION_CONTINUE) { |
|
2084 |
return check_for_visit(referree); |
|
2085 |
} else { |
|
2086 |
return control != JVMTI_ITERATION_ABORT; |
|
2087 |
} |
|
2088 |
} |
|
2089 |
||
2090 |
// invoke advanced style heap root callback |
|
2091 |
inline bool CallbackInvoker::invoke_advanced_heap_root_callback(jvmtiHeapReferenceKind ref_kind, |
|
2092 |
oop obj) { |
|
2093 |
assert(ServiceUtil::visible_oop(obj), "checking"); |
|
2094 |
||
2095 |
AdvancedHeapWalkContext* context = advanced_context(); |
|
2096 |
||
2097 |
// check that callback is provided |
|
2098 |
jvmtiHeapReferenceCallback cb = context->heap_reference_callback(); |
|
2099 |
if (cb == NULL) { |
|
2100 |
return check_for_visit(obj); |
|
2101 |
} |
|
2102 |
||
2103 |
// apply class filter |
|
2104 |
if (is_filtered_by_klass_filter(obj, context->klass_filter())) { |
|
2105 |
return check_for_visit(obj); |
|
2106 |
} |
|
2107 |
||
2108 |
// setup the callback wrapper |
|
2109 |
CallbackWrapper wrapper(tag_map(), obj); |
|
2110 |
||
2111 |
// apply tag filter |
|
2112 |
if (is_filtered_by_heap_filter(wrapper.obj_tag(), |
|
2113 |
wrapper.klass_tag(), |
|
2114 |
context->heap_filter())) { |
|
2115 |
return check_for_visit(obj); |
|
2116 |
} |
|
2117 |
||
2118 |
// for arrays we need the length, otherwise -1 |
|
2119 |
jint len = (jint)(obj->is_array() ? arrayOop(obj)->length() : -1); |
|
2120 |
||
2121 |
// invoke the callback |
|
2122 |
jint res = (*cb)(ref_kind, |
|
2123 |
NULL, // referrer info |
|
2124 |
wrapper.klass_tag(), |
|
2125 |
0, // referrer_class_tag is 0 for heap root |
|
2126 |
wrapper.obj_size(), |
|
2127 |
wrapper.obj_tag_p(), |
|
2128 |
NULL, // referrer_tag_p |
|
2129 |
len, |
|
2130 |
(void*)user_data()); |
|
2131 |
if (res & JVMTI_VISIT_ABORT) { |
|
2132 |
return false;// referrer class tag |
|
2133 |
} |
|
2134 |
if (res & JVMTI_VISIT_OBJECTS) { |
|
2135 |
check_for_visit(obj); |
|
2136 |
} |
|
2137 |
return true; |
|
2138 |
} |
|
2139 |
||
2140 |
// report a reference from a thread stack to an object |
|
2141 |
inline bool CallbackInvoker::invoke_advanced_stack_ref_callback(jvmtiHeapReferenceKind ref_kind, |
|
2142 |
jlong thread_tag, |
|
2143 |
jlong tid, |
|
2144 |
int depth, |
|
2145 |
jmethodID method, |
|
2146 |
jlocation bci, |
|
2147 |
jint slot, |
|
2148 |
oop obj) { |
|
2149 |
assert(ServiceUtil::visible_oop(obj), "checking"); |
|
2150 |
||
2151 |
AdvancedHeapWalkContext* context = advanced_context(); |
|
2152 |
||
2153 |
// check that callback is provider |
|
2154 |
jvmtiHeapReferenceCallback cb = context->heap_reference_callback(); |
|
2155 |
if (cb == NULL) { |
|
2156 |
return check_for_visit(obj); |
|
2157 |
} |
|
2158 |
||
2159 |
// apply class filter |
|
2160 |
if (is_filtered_by_klass_filter(obj, context->klass_filter())) { |
|
2161 |
return check_for_visit(obj); |
|
2162 |
} |
|
2163 |
||
2164 |
// setup the callback wrapper |
|
2165 |
CallbackWrapper wrapper(tag_map(), obj); |
|
2166 |
||
2167 |
// apply tag filter |
|
2168 |
if (is_filtered_by_heap_filter(wrapper.obj_tag(), |
|
2169 |
wrapper.klass_tag(), |
|
2170 |
context->heap_filter())) { |
|
2171 |
return check_for_visit(obj); |
|
2172 |
} |
|
2173 |
||
2174 |
// setup the referrer info |
|
2175 |
jvmtiHeapReferenceInfo reference_info; |
|
2176 |
reference_info.stack_local.thread_tag = thread_tag; |
|
2177 |
reference_info.stack_local.thread_id = tid; |
|
2178 |
reference_info.stack_local.depth = depth; |
|
2179 |
reference_info.stack_local.method = method; |
|
2180 |
reference_info.stack_local.location = bci; |
|
2181 |
reference_info.stack_local.slot = slot; |
|
2182 |
||
2183 |
// for arrays we need the length, otherwise -1 |
|
2184 |
jint len = (jint)(obj->is_array() ? arrayOop(obj)->length() : -1); |
|
2185 |
||
2186 |
// call into the agent |
|
2187 |
int res = (*cb)(ref_kind, |
|
2188 |
&reference_info, |
|
2189 |
wrapper.klass_tag(), |
|
2190 |
0, // referrer_class_tag is 0 for heap root (stack) |
|
2191 |
wrapper.obj_size(), |
|
2192 |
wrapper.obj_tag_p(), |
|
2193 |
NULL, // referrer_tag is 0 for root |
|
2194 |
len, |
|
2195 |
(void*)user_data()); |
|
2196 |
||
2197 |
if (res & JVMTI_VISIT_ABORT) { |
|
2198 |
return false; |
|
2199 |
} |
|
2200 |
if (res & JVMTI_VISIT_OBJECTS) { |
|
2201 |
check_for_visit(obj); |
|
2202 |
} |
|
2203 |
return true; |
|
2204 |
} |
|
2205 |
||
2206 |
// This mask is used to pass reference_info to a jvmtiHeapReferenceCallback |
|
2207 |
// only for ref_kinds defined by the JVM TI spec. Otherwise, NULL is passed. |
|
2208 |
#define REF_INFO_MASK ((1 << JVMTI_HEAP_REFERENCE_FIELD) \ |
|
2209 |
| (1 << JVMTI_HEAP_REFERENCE_STATIC_FIELD) \ |
|
2210 |
| (1 << JVMTI_HEAP_REFERENCE_ARRAY_ELEMENT) \ |
|
2211 |
| (1 << JVMTI_HEAP_REFERENCE_CONSTANT_POOL) \ |
|
2212 |
| (1 << JVMTI_HEAP_REFERENCE_STACK_LOCAL) \ |
|
2213 |
| (1 << JVMTI_HEAP_REFERENCE_JNI_LOCAL)) |
|
2214 |
||
2215 |
// invoke the object reference callback to report a reference |
|
2216 |
inline bool CallbackInvoker::invoke_advanced_object_reference_callback(jvmtiHeapReferenceKind ref_kind, |
|
2217 |
oop referrer, |
|
2218 |
oop obj, |
|
2219 |
jint index) |
|
2220 |
{ |
|
2221 |
// field index is only valid field in reference_info |
|
2222 |
static jvmtiHeapReferenceInfo reference_info = { 0 }; |
|
2223 |
||
2224 |
assert(ServiceUtil::visible_oop(referrer), "checking"); |
|
2225 |
assert(ServiceUtil::visible_oop(obj), "checking"); |
|
2226 |
||
2227 |
AdvancedHeapWalkContext* context = advanced_context(); |
|
2228 |
||
2229 |
// check that callback is provider |
|
2230 |
jvmtiHeapReferenceCallback cb = context->heap_reference_callback(); |
|
2231 |
if (cb == NULL) { |
|
2232 |
return check_for_visit(obj); |
|
2233 |
} |
|
2234 |
||
2235 |
// apply class filter |
|
2236 |
if (is_filtered_by_klass_filter(obj, context->klass_filter())) { |
|
2237 |
return check_for_visit(obj); |
|
2238 |
} |
|
2239 |
||
2240 |
// setup the callback wrapper |
|
2241 |
TwoOopCallbackWrapper wrapper(tag_map(), referrer, obj); |
|
2242 |
||
2243 |
// apply tag filter |
|
2244 |
if (is_filtered_by_heap_filter(wrapper.obj_tag(), |
|
2245 |
wrapper.klass_tag(), |
|
2246 |
context->heap_filter())) { |
|
2247 |
return check_for_visit(obj); |
|
2248 |
} |
|
2249 |
||
2250 |
// field index is only valid field in reference_info |
|
2251 |
reference_info.field.index = index; |
|
2252 |
||
2253 |
// for arrays we need the length, otherwise -1 |
|
2254 |
jint len = (jint)(obj->is_array() ? arrayOop(obj)->length() : -1); |
|
2255 |
||
2256 |
// invoke the callback |
|
2257 |
int res = (*cb)(ref_kind, |
|
2258 |
(REF_INFO_MASK & (1 << ref_kind)) ? &reference_info : NULL, |
|
2259 |
wrapper.klass_tag(), |
|
2260 |
wrapper.referrer_klass_tag(), |
|
2261 |
wrapper.obj_size(), |
|
2262 |
wrapper.obj_tag_p(), |
|
2263 |
wrapper.referrer_tag_p(), |
|
2264 |
len, |
|
2265 |
(void*)user_data()); |
|
2266 |
||
2267 |
if (res & JVMTI_VISIT_ABORT) { |
|
2268 |
return false; |
|
2269 |
} |
|
2270 |
if (res & JVMTI_VISIT_OBJECTS) { |
|
2271 |
check_for_visit(obj); |
|
2272 |
} |
|
2273 |
return true; |
|
2274 |
} |
|
2275 |
||
2276 |
// report a "simple root" |
|
2277 |
inline bool CallbackInvoker::report_simple_root(jvmtiHeapReferenceKind kind, oop obj) { |
|
2278 |
assert(kind != JVMTI_HEAP_REFERENCE_STACK_LOCAL && |
|
2279 |
kind != JVMTI_HEAP_REFERENCE_JNI_LOCAL, "not a simple root"); |
|
2280 |
assert(ServiceUtil::visible_oop(obj), "checking"); |
|
2281 |
||
2282 |
if (is_basic_heap_walk()) { |
|
2283 |
// map to old style root kind |
|
2284 |
jvmtiHeapRootKind root_kind = toJvmtiHeapRootKind(kind); |
|
2285 |
return invoke_basic_heap_root_callback(root_kind, obj); |
|
2286 |
} else { |
|
2287 |
assert(is_advanced_heap_walk(), "wrong heap walk type"); |
|
2288 |
return invoke_advanced_heap_root_callback(kind, obj); |
|
2289 |
} |
|
2290 |
} |
|
2291 |
||
2292 |
||
2293 |
// invoke the primitive array values |
|
2294 |
inline bool CallbackInvoker::report_primitive_array_values(oop obj) { |
|
2295 |
assert(obj->is_typeArray(), "not a primitive array"); |
|
2296 |
||
2297 |
AdvancedHeapWalkContext* context = advanced_context(); |
|
2298 |
assert(context->array_primitive_value_callback() != NULL, "no callback"); |
|
2299 |
||
2300 |
// apply class filter |
|
2301 |
if (is_filtered_by_klass_filter(obj, context->klass_filter())) { |
|
2302 |
return true; |
|
2303 |
} |
|
2304 |
||
2305 |
CallbackWrapper wrapper(tag_map(), obj); |
|
2306 |
||
2307 |
// apply tag filter |
|
2308 |
if (is_filtered_by_heap_filter(wrapper.obj_tag(), |
|
2309 |
wrapper.klass_tag(), |
|
2310 |
context->heap_filter())) { |
|
2311 |
return true; |
|
2312 |
} |
|
2313 |
||
2314 |
// invoke the callback |
|
2315 |
int res = invoke_array_primitive_value_callback(context->array_primitive_value_callback(), |
|
2316 |
&wrapper, |
|
2317 |
obj, |
|
2318 |
(void*)user_data()); |
|
2319 |
return (!(res & JVMTI_VISIT_ABORT)); |
|
2320 |
} |
|
2321 |
||
2322 |
// invoke the string value callback |
|
2323 |
inline bool CallbackInvoker::report_string_value(oop str) { |
|
4571 | 2324 |
assert(str->klass() == SystemDictionary::String_klass(), "not a string"); |
1 | 2325 |
|
2326 |
AdvancedHeapWalkContext* context = advanced_context(); |
|
2327 |
assert(context->string_primitive_value_callback() != NULL, "no callback"); |
|
2328 |
||
2329 |
// apply class filter |
|
2330 |
if (is_filtered_by_klass_filter(str, context->klass_filter())) { |
|
2331 |
return true; |
|
2332 |
} |
|
2333 |
||
2334 |
CallbackWrapper wrapper(tag_map(), str); |
|
2335 |
||
2336 |
// apply tag filter |
|
2337 |
if (is_filtered_by_heap_filter(wrapper.obj_tag(), |
|
2338 |
wrapper.klass_tag(), |
|
2339 |
context->heap_filter())) { |
|
2340 |
return true; |
|
2341 |
} |
|
2342 |
||
2343 |
// invoke the callback |
|
2344 |
int res = invoke_string_value_callback(context->string_primitive_value_callback(), |
|
2345 |
&wrapper, |
|
2346 |
str, |
|
2347 |
(void*)user_data()); |
|
2348 |
return (!(res & JVMTI_VISIT_ABORT)); |
|
2349 |
} |
|
2350 |
||
2351 |
// invoke the primitive field callback |
|
2352 |
inline bool CallbackInvoker::report_primitive_field(jvmtiHeapReferenceKind ref_kind, |
|
2353 |
oop obj, |
|
2354 |
jint index, |
|
2355 |
address addr, |
|
2356 |
char type) |
|
2357 |
{ |
|
2358 |
// for primitive fields only the index will be set |
|
2359 |
static jvmtiHeapReferenceInfo reference_info = { 0 }; |
|
2360 |
||
2361 |
AdvancedHeapWalkContext* context = advanced_context(); |
|
2362 |
assert(context->primitive_field_callback() != NULL, "no callback"); |
|
2363 |
||
2364 |
// apply class filter |
|
2365 |
if (is_filtered_by_klass_filter(obj, context->klass_filter())) { |
|
2366 |
return true; |
|
2367 |
} |
|
2368 |
||
2369 |
CallbackWrapper wrapper(tag_map(), obj); |
|
2370 |
||
2371 |
// apply tag filter |
|
2372 |
if (is_filtered_by_heap_filter(wrapper.obj_tag(), |
|
2373 |
wrapper.klass_tag(), |
|
2374 |
context->heap_filter())) { |
|
2375 |
return true; |
|
2376 |
} |
|
2377 |
||
2378 |
// the field index in the referrer |
|
2379 |
reference_info.field.index = index; |
|
2380 |
||
2381 |
// map the type |
|
2382 |
jvmtiPrimitiveType value_type = (jvmtiPrimitiveType)type; |
|
2383 |
||
2384 |
// setup the jvalue |
|
2385 |
jvalue value; |
|
2386 |
copy_to_jvalue(&value, addr, value_type); |
|
2387 |
||
2388 |
jvmtiPrimitiveFieldCallback cb = context->primitive_field_callback(); |
|
2389 |
int res = (*cb)(ref_kind, |
|
2390 |
&reference_info, |
|
2391 |
wrapper.klass_tag(), |
|
2392 |
wrapper.obj_tag_p(), |
|
2393 |
value, |
|
2394 |
value_type, |
|
2395 |
(void*)user_data()); |
|
2396 |
return (!(res & JVMTI_VISIT_ABORT)); |
|
2397 |
} |
|
2398 |
||
2399 |
||
2400 |
// instance field |
|
2401 |
inline bool CallbackInvoker::report_primitive_instance_field(oop obj, |
|
2402 |
jint index, |
|
2403 |
address value, |
|
2404 |
char type) { |
|
2405 |
return report_primitive_field(JVMTI_HEAP_REFERENCE_FIELD, |
|
2406 |
obj, |
|
2407 |
index, |
|
2408 |
value, |
|
2409 |
type); |
|
2410 |
} |
|
2411 |
||
2412 |
// static field |
|
2413 |
inline bool CallbackInvoker::report_primitive_static_field(oop obj, |
|
2414 |
jint index, |
|
2415 |
address value, |
|
2416 |
char type) { |
|
2417 |
return report_primitive_field(JVMTI_HEAP_REFERENCE_STATIC_FIELD, |
|
2418 |
obj, |
|
2419 |
index, |
|
2420 |
value, |
|
2421 |
type); |
|
2422 |
} |
|
2423 |
||
2424 |
// report a JNI local (root object) to the profiler |
|
2425 |
inline bool CallbackInvoker::report_jni_local_root(jlong thread_tag, jlong tid, jint depth, jmethodID m, oop obj) { |
|
2426 |
if (is_basic_heap_walk()) { |
|
2427 |
return invoke_basic_stack_ref_callback(JVMTI_HEAP_ROOT_JNI_LOCAL, |
|
2428 |
thread_tag, |
|
2429 |
depth, |
|
2430 |
m, |
|
2431 |
-1, |
|
2432 |
obj); |
|
2433 |
} else { |
|
2434 |
return invoke_advanced_stack_ref_callback(JVMTI_HEAP_REFERENCE_JNI_LOCAL, |
|
2435 |
thread_tag, tid, |
|
2436 |
depth, |
|
2437 |
m, |
|
2438 |
(jlocation)-1, |
|
2439 |
-1, |
|
2440 |
obj); |
|
2441 |
} |
|
2442 |
} |
|
2443 |
||
2444 |
||
2445 |
// report a local (stack reference, root object) |
|
2446 |
inline bool CallbackInvoker::report_stack_ref_root(jlong thread_tag, |
|
2447 |
jlong tid, |
|
2448 |
jint depth, |
|
2449 |
jmethodID method, |
|
2450 |
jlocation bci, |
|
2451 |
jint slot, |
|
2452 |
oop obj) { |
|
2453 |
if (is_basic_heap_walk()) { |
|
2454 |
return invoke_basic_stack_ref_callback(JVMTI_HEAP_ROOT_STACK_LOCAL, |
|
2455 |
thread_tag, |
|
2456 |
depth, |
|
2457 |
method, |
|
2458 |
slot, |
|
2459 |
obj); |
|
2460 |
} else { |
|
2461 |
return invoke_advanced_stack_ref_callback(JVMTI_HEAP_REFERENCE_STACK_LOCAL, |
|
2462 |
thread_tag, |
|
2463 |
tid, |
|
2464 |
depth, |
|
2465 |
method, |
|
2466 |
bci, |
|
2467 |
slot, |
|
2468 |
obj); |
|
2469 |
} |
|
2470 |
} |
|
2471 |
||
2472 |
// report an object referencing a class. |
|
2473 |
inline bool CallbackInvoker::report_class_reference(oop referrer, oop referree) { |
|
2474 |
if (is_basic_heap_walk()) { |
|
2475 |
return invoke_basic_object_reference_callback(JVMTI_REFERENCE_CLASS, referrer, referree, -1); |
|
2476 |
} else { |
|
2477 |
return invoke_advanced_object_reference_callback(JVMTI_HEAP_REFERENCE_CLASS, referrer, referree, -1); |
|
2478 |
} |
|
2479 |
} |
|
2480 |
||
2481 |
// report a class referencing its class loader. |
|
2482 |
inline bool CallbackInvoker::report_class_loader_reference(oop referrer, oop referree) { |
|
2483 |
if (is_basic_heap_walk()) { |
|
2484 |
return invoke_basic_object_reference_callback(JVMTI_REFERENCE_CLASS_LOADER, referrer, referree, -1); |
|
2485 |
} else { |
|
2486 |
return invoke_advanced_object_reference_callback(JVMTI_HEAP_REFERENCE_CLASS_LOADER, referrer, referree, -1); |
|
2487 |
} |
|
2488 |
} |
|
2489 |
||
2490 |
// report a class referencing its signers. |
|
2491 |
inline bool CallbackInvoker::report_signers_reference(oop referrer, oop referree) { |
|
2492 |
if (is_basic_heap_walk()) { |
|
2493 |
return invoke_basic_object_reference_callback(JVMTI_REFERENCE_SIGNERS, referrer, referree, -1); |
|
2494 |
} else { |
|
2495 |
return invoke_advanced_object_reference_callback(JVMTI_HEAP_REFERENCE_SIGNERS, referrer, referree, -1); |
|
2496 |
} |
|
2497 |
} |
|
2498 |
||
2499 |
// report a class referencing its protection domain.. |
|
2500 |
inline bool CallbackInvoker::report_protection_domain_reference(oop referrer, oop referree) { |
|
2501 |
if (is_basic_heap_walk()) { |
|
2502 |
return invoke_basic_object_reference_callback(JVMTI_REFERENCE_PROTECTION_DOMAIN, referrer, referree, -1); |
|
2503 |
} else { |
|
2504 |
return invoke_advanced_object_reference_callback(JVMTI_HEAP_REFERENCE_PROTECTION_DOMAIN, referrer, referree, -1); |
|
2505 |
} |
|
2506 |
} |
|
2507 |
||
2508 |
// report a class referencing its superclass. |
|
2509 |
inline bool CallbackInvoker::report_superclass_reference(oop referrer, oop referree) { |
|
2510 |
if (is_basic_heap_walk()) { |
|
2511 |
// Send this to be consistent with past implementation |
|
2512 |
return invoke_basic_object_reference_callback(JVMTI_REFERENCE_CLASS, referrer, referree, -1); |
|
2513 |
} else { |
|
2514 |
return invoke_advanced_object_reference_callback(JVMTI_HEAP_REFERENCE_SUPERCLASS, referrer, referree, -1); |
|
2515 |
} |
|
2516 |
} |
|
2517 |
||
2518 |
// report a class referencing one of its interfaces. |
|
2519 |
inline bool CallbackInvoker::report_interface_reference(oop referrer, oop referree) { |
|
2520 |
if (is_basic_heap_walk()) { |
|
2521 |
return invoke_basic_object_reference_callback(JVMTI_REFERENCE_INTERFACE, referrer, referree, -1); |
|
2522 |
} else { |
|
2523 |
return invoke_advanced_object_reference_callback(JVMTI_HEAP_REFERENCE_INTERFACE, referrer, referree, -1); |
|
2524 |
} |
|
2525 |
} |
|
2526 |
||
2527 |
// report a class referencing one of its static fields. |
|
2528 |
inline bool CallbackInvoker::report_static_field_reference(oop referrer, oop referree, jint slot) { |
|
2529 |
if (is_basic_heap_walk()) { |
|
2530 |
return invoke_basic_object_reference_callback(JVMTI_REFERENCE_STATIC_FIELD, referrer, referree, slot); |
|
2531 |
} else { |
|
2532 |
return invoke_advanced_object_reference_callback(JVMTI_HEAP_REFERENCE_STATIC_FIELD, referrer, referree, slot); |
|
2533 |
} |
|
2534 |
} |
|
2535 |
||
2536 |
// report an array referencing an element object |
|
2537 |
inline bool CallbackInvoker::report_array_element_reference(oop referrer, oop referree, jint index) { |
|
2538 |
if (is_basic_heap_walk()) { |
|
2539 |
return invoke_basic_object_reference_callback(JVMTI_REFERENCE_ARRAY_ELEMENT, referrer, referree, index); |
|
2540 |
} else { |
|
2541 |
return invoke_advanced_object_reference_callback(JVMTI_HEAP_REFERENCE_ARRAY_ELEMENT, referrer, referree, index); |
|
2542 |
} |
|
2543 |
} |
|
2544 |
||
2545 |
// report an object referencing an instance field object |
|
2546 |
inline bool CallbackInvoker::report_field_reference(oop referrer, oop referree, jint slot) { |
|
2547 |
if (is_basic_heap_walk()) { |
|
2548 |
return invoke_basic_object_reference_callback(JVMTI_REFERENCE_FIELD, referrer, referree, slot); |
|
2549 |
} else { |
|
2550 |
return invoke_advanced_object_reference_callback(JVMTI_HEAP_REFERENCE_FIELD, referrer, referree, slot); |
|
2551 |
} |
|
2552 |
} |
|
2553 |
||
2554 |
// report an array referencing an element object |
|
2555 |
inline bool CallbackInvoker::report_constant_pool_reference(oop referrer, oop referree, jint index) { |
|
2556 |
if (is_basic_heap_walk()) { |
|
2557 |
return invoke_basic_object_reference_callback(JVMTI_REFERENCE_CONSTANT_POOL, referrer, referree, index); |
|
2558 |
} else { |
|
2559 |
return invoke_advanced_object_reference_callback(JVMTI_HEAP_REFERENCE_CONSTANT_POOL, referrer, referree, index); |
|
2560 |
} |
|
2561 |
} |
|
2562 |
||
2563 |
// A supporting closure used to process simple roots |
|
2564 |
class SimpleRootsClosure : public OopClosure { |
|
2565 |
private: |
|
2566 |
jvmtiHeapReferenceKind _kind; |
|
2567 |
bool _continue; |
|
2568 |
||
2569 |
jvmtiHeapReferenceKind root_kind() { return _kind; } |
|
2570 |
||
2571 |
public: |
|
2572 |
void set_kind(jvmtiHeapReferenceKind kind) { |
|
2573 |
_kind = kind; |
|
2574 |
_continue = true; |
|
2575 |
} |
|
2576 |
||
2577 |
inline bool stopped() { |
|
2578 |
return !_continue; |
|
2579 |
} |
|
2580 |
||
2581 |
void do_oop(oop* obj_p) { |
|
2582 |
// iteration has terminated |
|
2583 |
if (stopped()) { |
|
2584 |
return; |
|
2585 |
} |
|
2586 |
||
2587 |
oop o = *obj_p; |
|
48787
7638bf98a312
8194312: Support parallel and concurrent JNI global handle processing
kbarrett
parents:
48616
diff
changeset
|
2588 |
// ignore null |
7638bf98a312
8194312: Support parallel and concurrent JNI global handle processing
kbarrett
parents:
48616
diff
changeset
|
2589 |
if (o == NULL) { |
1 | 2590 |
return; |
2591 |
} |
|
2592 |
||
13741
e4395deb8597
7197350: NPG: jvmtiHeapReferenceCallback receives incorrect reference_kind for system class roots
stefank
parents:
13738
diff
changeset
|
2593 |
assert(Universe::heap()->is_in_reserved(o), "should be impossible"); |
e4395deb8597
7197350: NPG: jvmtiHeapReferenceCallback receives incorrect reference_kind for system class roots
stefank
parents:
13738
diff
changeset
|
2594 |
|
1 | 2595 |
jvmtiHeapReferenceKind kind = root_kind(); |
13741
e4395deb8597
7197350: NPG: jvmtiHeapReferenceCallback receives incorrect reference_kind for system class roots
stefank
parents:
13738
diff
changeset
|
2596 |
if (kind == JVMTI_HEAP_REFERENCE_SYSTEM_CLASS) { |
1 | 2597 |
// SystemDictionary::always_strong_oops_do reports the application |
2598 |
// class loader as a root. We want this root to be reported as |
|
2599 |
// a root kind of "OTHER" rather than "SYSTEM_CLASS". |
|
33611
9abd65805e19
8139203: Consistent naming for klass type predicates
coleenp
parents:
33602
diff
changeset
|
2600 |
if (!o->is_instance() || !InstanceKlass::cast(o->klass())->is_mirror_instance_klass()) { |
1 | 2601 |
kind = JVMTI_HEAP_REFERENCE_OTHER; |
2602 |
} |
|
13741
e4395deb8597
7197350: NPG: jvmtiHeapReferenceCallback receives incorrect reference_kind for system class roots
stefank
parents:
13738
diff
changeset
|
2603 |
} |
1 | 2604 |
|
2605 |
// some objects are ignored - in the case of simple |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7916
diff
changeset
|
2606 |
// roots it's mostly Symbol*s that we are skipping |
1 | 2607 |
// here. |
2608 |
if (!ServiceUtil::visible_oop(o)) { |
|
2609 |
return; |
|
2610 |
} |
|
2611 |
||
2612 |
// invoke the callback |
|
2613 |
_continue = CallbackInvoker::report_simple_root(kind, o); |
|
2614 |
||
2615 |
} |
|
360
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
1
diff
changeset
|
2616 |
virtual void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
1 | 2617 |
}; |
2618 |
||
2619 |
// A supporting closure used to process JNI locals |
|
2620 |
class JNILocalRootsClosure : public OopClosure { |
|
2621 |
private: |
|
2622 |
jlong _thread_tag; |
|
2623 |
jlong _tid; |
|
2624 |
jint _depth; |
|
2625 |
jmethodID _method; |
|
2626 |
bool _continue; |
|
2627 |
public: |
|
2628 |
void set_context(jlong thread_tag, jlong tid, jint depth, jmethodID method) { |
|
2629 |
_thread_tag = thread_tag; |
|
2630 |
_tid = tid; |
|
2631 |
_depth = depth; |
|
2632 |
_method = method; |
|
2633 |
_continue = true; |
|
2634 |
} |
|
2635 |
||
2636 |
inline bool stopped() { |
|
2637 |
return !_continue; |
|
2638 |
} |
|
2639 |
||
2640 |
void do_oop(oop* obj_p) { |
|
2641 |
// iteration has terminated |
|
2642 |
if (stopped()) { |
|
2643 |
return; |
|
2644 |
} |
|
2645 |
||
2646 |
oop o = *obj_p; |
|
48787
7638bf98a312
8194312: Support parallel and concurrent JNI global handle processing
kbarrett
parents:
48616
diff
changeset
|
2647 |
// ignore null |
7638bf98a312
8194312: Support parallel and concurrent JNI global handle processing
kbarrett
parents:
48616
diff
changeset
|
2648 |
if (o == NULL) { |
1 | 2649 |
return; |
2650 |
} |
|
2651 |
||
2652 |
if (!ServiceUtil::visible_oop(o)) { |
|
2653 |
return; |
|
2654 |
} |
|
2655 |
||
2656 |
// invoke the callback |
|
2657 |
_continue = CallbackInvoker::report_jni_local_root(_thread_tag, _tid, _depth, _method, o); |
|
2658 |
} |
|
360
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
1
diff
changeset
|
2659 |
virtual void do_oop(narrowOop* obj_p) { ShouldNotReachHere(); } |
1 | 2660 |
}; |
2661 |
||
2662 |
||
2663 |
// A VM operation to iterate over objects that are reachable from |
|
2664 |
// a set of roots or an initial object. |
|
2665 |
// |
|
2666 |
// For VM_HeapWalkOperation the set of roots used is :- |
|
2667 |
// |
|
2668 |
// - All JNI global references |
|
2669 |
// - All inflated monitors |
|
2670 |
// - All classes loaded by the boot class loader (or all classes |
|
2671 |
// in the event that class unloading is disabled) |
|
2672 |
// - All java threads |
|
2673 |
// - For each java thread then all locals and JNI local references |
|
2674 |
// on the thread's execution stack |
|
2675 |
// - All visible/explainable objects from Universes::oops_do |
|
2676 |
// |
|
2677 |
class VM_HeapWalkOperation: public VM_Operation { |
|
2678 |
private: |
|
2679 |
enum { |
|
2680 |
initial_visit_stack_size = 4000 |
|
2681 |
}; |
|
2682 |
||
2683 |
bool _is_advanced_heap_walk; // indicates FollowReferences |
|
2684 |
JvmtiTagMap* _tag_map; |
|
2685 |
Handle _initial_object; |
|
2686 |
GrowableArray<oop>* _visit_stack; // the visit stack |
|
2687 |
||
2688 |
bool _collecting_heap_roots; // are we collecting roots |
|
2689 |
bool _following_object_refs; // are we following object references |
|
2690 |
||
2691 |
bool _reporting_primitive_fields; // optional reporting |
|
2692 |
bool _reporting_primitive_array_values; |
|
2693 |
bool _reporting_string_values; |
|
2694 |
||
2695 |
GrowableArray<oop>* create_visit_stack() { |
|
13195 | 2696 |
return new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(initial_visit_stack_size, true); |
1 | 2697 |
} |
2698 |
||
2699 |
// accessors |
|
2700 |
bool is_advanced_heap_walk() const { return _is_advanced_heap_walk; } |
|
2701 |
JvmtiTagMap* tag_map() const { return _tag_map; } |
|
2702 |
Handle initial_object() const { return _initial_object; } |
|
2703 |
||
2704 |
bool is_following_references() const { return _following_object_refs; } |
|
2705 |
||
2706 |
bool is_reporting_primitive_fields() const { return _reporting_primitive_fields; } |
|
2707 |
bool is_reporting_primitive_array_values() const { return _reporting_primitive_array_values; } |
|
2708 |
bool is_reporting_string_values() const { return _reporting_string_values; } |
|
2709 |
||
2710 |
GrowableArray<oop>* visit_stack() const { return _visit_stack; } |
|
2711 |
||
2712 |
// iterate over the various object types |
|
2713 |
inline bool iterate_over_array(oop o); |
|
2714 |
inline bool iterate_over_type_array(oop o); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
2715 |
inline bool iterate_over_class(oop o); |
1 | 2716 |
inline bool iterate_over_object(oop o); |
2717 |
||
2718 |
// root collection |
|
2719 |
inline bool collect_simple_roots(); |
|
2720 |
inline bool collect_stack_roots(); |
|
2721 |
inline bool collect_stack_roots(JavaThread* java_thread, JNILocalRootsClosure* blk); |
|
2722 |
||
2723 |
// visit an object |
|
2724 |
inline bool visit(oop o); |
|
2725 |
||
2726 |
public: |
|
2727 |
VM_HeapWalkOperation(JvmtiTagMap* tag_map, |
|
2728 |
Handle initial_object, |
|
2729 |
BasicHeapWalkContext callbacks, |
|
2730 |
const void* user_data); |
|
2731 |
||
2732 |
VM_HeapWalkOperation(JvmtiTagMap* tag_map, |
|
2733 |
Handle initial_object, |
|
2734 |
AdvancedHeapWalkContext callbacks, |
|
2735 |
const void* user_data); |
|
2736 |
||
2737 |
~VM_HeapWalkOperation(); |
|
2738 |
||
2739 |
VMOp_Type type() const { return VMOp_HeapWalkOperation; } |
|
2740 |
void doit(); |
|
2741 |
}; |
|
2742 |
||
2743 |
||
2744 |
VM_HeapWalkOperation::VM_HeapWalkOperation(JvmtiTagMap* tag_map, |
|
2745 |
Handle initial_object, |
|
2746 |
BasicHeapWalkContext callbacks, |
|
2747 |
const void* user_data) { |
|
2748 |
_is_advanced_heap_walk = false; |
|
2749 |
_tag_map = tag_map; |
|
2750 |
_initial_object = initial_object; |
|
2751 |
_following_object_refs = (callbacks.object_ref_callback() != NULL); |
|
2752 |
_reporting_primitive_fields = false; |
|
2753 |
_reporting_primitive_array_values = false; |
|
2754 |
_reporting_string_values = false; |
|
2755 |
_visit_stack = create_visit_stack(); |
|
2756 |
||
2757 |
||
2758 |
CallbackInvoker::initialize_for_basic_heap_walk(tag_map, _visit_stack, user_data, callbacks); |
|
2759 |
} |
|
2760 |
||
2761 |
VM_HeapWalkOperation::VM_HeapWalkOperation(JvmtiTagMap* tag_map, |
|
2762 |
Handle initial_object, |
|
2763 |
AdvancedHeapWalkContext callbacks, |
|
2764 |
const void* user_data) { |
|
2765 |
_is_advanced_heap_walk = true; |
|
2766 |
_tag_map = tag_map; |
|
2767 |
_initial_object = initial_object; |
|
2768 |
_following_object_refs = true; |
|
2769 |
_reporting_primitive_fields = (callbacks.primitive_field_callback() != NULL);; |
|
2770 |
_reporting_primitive_array_values = (callbacks.array_primitive_value_callback() != NULL);; |
|
2771 |
_reporting_string_values = (callbacks.string_primitive_value_callback() != NULL);; |
|
2772 |
_visit_stack = create_visit_stack(); |
|
2773 |
||
2774 |
CallbackInvoker::initialize_for_advanced_heap_walk(tag_map, _visit_stack, user_data, callbacks); |
|
2775 |
} |
|
2776 |
||
2777 |
VM_HeapWalkOperation::~VM_HeapWalkOperation() { |
|
2778 |
if (_following_object_refs) { |
|
2779 |
assert(_visit_stack != NULL, "checking"); |
|
2780 |
delete _visit_stack; |
|
2781 |
_visit_stack = NULL; |
|
2782 |
} |
|
2783 |
} |
|
2784 |
||
2785 |
// an array references its class and has a reference to |
|
2786 |
// each element in the array |
|
2787 |
inline bool VM_HeapWalkOperation::iterate_over_array(oop o) { |
|
2788 |
objArrayOop array = objArrayOop(o); |
|
2789 |
||
2790 |
// array reference to its class |
|
13952
e3cf184080bc
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents:
13741
diff
changeset
|
2791 |
oop mirror = ObjArrayKlass::cast(array->klass())->java_mirror(); |
1 | 2792 |
if (!CallbackInvoker::report_class_reference(o, mirror)) { |
2793 |
return false; |
|
2794 |
} |
|
2795 |
||
2796 |
// iterate over the array and report each reference to a |
|
2797 |
// non-null element |
|
2798 |
for (int index=0; index<array->length(); index++) { |
|
2799 |
oop elem = array->obj_at(index); |
|
2800 |
if (elem == NULL) { |
|
2801 |
continue; |
|
2802 |
} |
|
2803 |
||
2804 |
// report the array reference o[index] = elem |
|
2805 |
if (!CallbackInvoker::report_array_element_reference(o, elem, index)) { |
|
2806 |
return false; |
|
2807 |
} |
|
2808 |
} |
|
2809 |
return true; |
|
2810 |
} |
|
2811 |
||
2812 |
// a type array references its class |
|
2813 |
inline bool VM_HeapWalkOperation::iterate_over_type_array(oop o) { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
2814 |
Klass* k = o->klass(); |
14488 | 2815 |
oop mirror = k->java_mirror(); |
1 | 2816 |
if (!CallbackInvoker::report_class_reference(o, mirror)) { |
2817 |
return false; |
|
2818 |
} |
|
2819 |
||
2820 |
// report the array contents if required |
|
2821 |
if (is_reporting_primitive_array_values()) { |
|
2822 |
if (!CallbackInvoker::report_primitive_array_values(o)) { |
|
2823 |
return false; |
|
2824 |
} |
|
2825 |
} |
|
2826 |
return true; |
|
2827 |
} |
|
2828 |
||
22741
13fdeb7d7aad
8033289: clang: clean up unused function warning
henryjen
parents:
20282
diff
changeset
|
2829 |
#ifdef ASSERT |
1 | 2830 |
// verify that a static oop field is in range |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
2831 |
static inline bool verify_static_oop(InstanceKlass* ik, |
8725
8c1e3dd5fe1b
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
8076
diff
changeset
|
2832 |
oop mirror, int offset) { |
8c1e3dd5fe1b
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
8076
diff
changeset
|
2833 |
address obj_p = (address)mirror + offset; |
13738
d67be49a5beb
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
parents:
13728
diff
changeset
|
2834 |
address start = (address)InstanceMirrorKlass::start_of_static_fields(mirror); |
8725
8c1e3dd5fe1b
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
8076
diff
changeset
|
2835 |
address end = start + (java_lang_Class::static_oop_field_count(mirror) * heapOopSize); |
1 | 2836 |
assert(end >= start, "sanity check"); |
2837 |
||
2838 |
if (obj_p >= start && obj_p < end) { |
|
2839 |
return true; |
|
2840 |
} else { |
|
2841 |
return false; |
|
2842 |
} |
|
2843 |
} |
|
22741
13fdeb7d7aad
8033289: clang: clean up unused function warning
henryjen
parents:
20282
diff
changeset
|
2844 |
#endif // #ifdef ASSERT |
1 | 2845 |
|
2846 |
// a class references its super class, interfaces, class loader, ... |
|
2847 |
// and finally its static fields |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
2848 |
inline bool VM_HeapWalkOperation::iterate_over_class(oop java_class) { |
1 | 2849 |
int i; |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
2850 |
Klass* klass = java_lang_Class::as_Klass(java_class); |
1 | 2851 |
|
33611
9abd65805e19
8139203: Consistent naming for klass type predicates
coleenp
parents:
33602
diff
changeset
|
2852 |
if (klass->is_instance_klass()) { |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
2853 |
InstanceKlass* ik = InstanceKlass::cast(klass); |
1 | 2854 |
|
31974
869b4f9cbb40
8131600: heapdump/JMapHeap EXCEPTION_ACCESS_VIOLATION
brutisso
parents:
30764
diff
changeset
|
2855 |
// Ignore the class if it hasn't been initialized yet |
1 | 2856 |
if (!ik->is_linked()) { |
2857 |
return true; |
|
2858 |
} |
|
2859 |
||
2860 |
// get the java mirror |
|
2861 |
oop mirror = klass->java_mirror(); |
|
2862 |
||
2863 |
// super (only if something more interesting than java.lang.Object) |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
2864 |
Klass* java_super = ik->java_super(); |
4571 | 2865 |
if (java_super != NULL && java_super != SystemDictionary::Object_klass()) { |
14488 | 2866 |
oop super = java_super->java_mirror(); |
1 | 2867 |
if (!CallbackInvoker::report_superclass_reference(mirror, super)) { |
2868 |
return false; |
|
2869 |
} |
|
2870 |
} |
|
2871 |
||
2872 |
// class loader |
|
2873 |
oop cl = ik->class_loader(); |
|
2874 |
if (cl != NULL) { |
|
2875 |
if (!CallbackInvoker::report_class_loader_reference(mirror, cl)) { |
|
2876 |
return false; |
|
2877 |
} |
|
2878 |
} |
|
2879 |
||
2880 |
// protection domain |
|
2881 |
oop pd = ik->protection_domain(); |
|
2882 |
if (pd != NULL) { |
|
2883 |
if (!CallbackInvoker::report_protection_domain_reference(mirror, pd)) { |
|
2884 |
return false; |
|
2885 |
} |
|
2886 |
} |
|
2887 |
||
2888 |
// signers |
|
2889 |
oop signers = ik->signers(); |
|
2890 |
if (signers != NULL) { |
|
2891 |
if (!CallbackInvoker::report_signers_reference(mirror, signers)) { |
|
2892 |
return false; |
|
2893 |
} |
|
2894 |
} |
|
2895 |
||
2896 |
// references from the constant pool |
|
2897 |
{ |
|
17370
59a0620561fa
8003557: NPG: Klass* const k should be const Klass* k.
minqi
parents:
17087
diff
changeset
|
2898 |
ConstantPool* pool = ik->constants(); |
1 | 2899 |
for (int i = 1; i < pool->length(); i++) { |
2900 |
constantTag tag = pool->tag_at(i).value(); |
|
2901 |
if (tag.is_string() || tag.is_klass()) { |
|
2902 |
oop entry; |
|
2903 |
if (tag.is_string()) { |
|
2904 |
entry = pool->resolved_string_at(i); |
|
13976
93a075193661
8000459: assert(java_lang_String::is_instance(entry)) failure with various mlvm tests.
jiangli
parents:
13741
diff
changeset
|
2905 |
// If the entry is non-null it is resolved. |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
2906 |
if (entry == NULL) continue; |
1 | 2907 |
} else { |
14488 | 2908 |
entry = pool->resolved_klass_at(i)->java_mirror(); |
1 | 2909 |
} |
2910 |
if (!CallbackInvoker::report_constant_pool_reference(mirror, entry, (jint)i)) { |
|
2911 |
return false; |
|
2912 |
} |
|
2913 |
} |
|
2914 |
} |
|
2915 |
} |
|
2916 |
||
2917 |
// interfaces |
|
2918 |
// (These will already have been reported as references from the constant pool |
|
2919 |
// but are specified by IterateOverReachableObjects and must be reported). |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
2920 |
Array<Klass*>* interfaces = ik->local_interfaces(); |
1 | 2921 |
for (i = 0; i < interfaces->length(); i++) { |
14488 | 2922 |
oop interf = ((Klass*)interfaces->at(i))->java_mirror(); |
1 | 2923 |
if (interf == NULL) { |
2924 |
continue; |
|
2925 |
} |
|
2926 |
if (!CallbackInvoker::report_interface_reference(mirror, interf)) { |
|
2927 |
return false; |
|
2928 |
} |
|
2929 |
} |
|
2930 |
||
2931 |
// iterate over the static fields |
|
2932 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
2933 |
ClassFieldMap* field_map = ClassFieldMap::create_map_of_static_fields(klass); |
1 | 2934 |
for (i=0; i<field_map->field_count(); i++) { |
2935 |
ClassFieldDescriptor* field = field_map->field_at(i); |
|
2936 |
char type = field->field_type(); |
|
2937 |
if (!is_primitive_field_type(type)) { |
|
8725
8c1e3dd5fe1b
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
8076
diff
changeset
|
2938 |
oop fld_o = mirror->obj_field(field->field_offset()); |
8c1e3dd5fe1b
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
8076
diff
changeset
|
2939 |
assert(verify_static_oop(ik, mirror, field->field_offset()), "sanity check"); |
1 | 2940 |
if (fld_o != NULL) { |
2941 |
int slot = field->field_index(); |
|
2942 |
if (!CallbackInvoker::report_static_field_reference(mirror, fld_o, slot)) { |
|
2943 |
delete field_map; |
|
2944 |
return false; |
|
2945 |
} |
|
2946 |
} |
|
2947 |
} else { |
|
2948 |
if (is_reporting_primitive_fields()) { |
|
8726
7bafcf0e5bfb
7029509: nightly failures after static fields in Class
never
parents:
8725
diff
changeset
|
2949 |
address addr = (address)mirror + field->field_offset(); |
1 | 2950 |
int slot = field->field_index(); |
2951 |
if (!CallbackInvoker::report_primitive_static_field(mirror, slot, addr, type)) { |
|
2952 |
delete field_map; |
|
2953 |
return false; |
|
2954 |
} |
|
2955 |
} |
|
2956 |
} |
|
2957 |
} |
|
2958 |
delete field_map; |
|
2959 |
||
2960 |
return true; |
|
2961 |
} |
|
2962 |
||
2963 |
return true; |
|
2964 |
} |
|
2965 |
||
2966 |
// an object references a class and its instance fields |
|
2967 |
// (static fields are ignored here as we report these as |
|
2968 |
// references from the class). |
|
2969 |
inline bool VM_HeapWalkOperation::iterate_over_object(oop o) { |
|
2970 |
// reference to the class |
|
14488 | 2971 |
if (!CallbackInvoker::report_class_reference(o, o->klass()->java_mirror())) { |
1 | 2972 |
return false; |
2973 |
} |
|
2974 |
||
2975 |
// iterate over instance fields |
|
2976 |
ClassFieldMap* field_map = JvmtiCachedClassFieldMap::get_map_of_instance_fields(o); |
|
2977 |
for (int i=0; i<field_map->field_count(); i++) { |
|
2978 |
ClassFieldDescriptor* field = field_map->field_at(i); |
|
2979 |
char type = field->field_type(); |
|
2980 |
if (!is_primitive_field_type(type)) { |
|
360
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
1
diff
changeset
|
2981 |
oop fld_o = o->obj_field(field->field_offset()); |
11773
7c8ab49996da
7130993: nsk/jdi/ReferenceType/instances/instances004 fails with JFR: assert(ServiceUtil::visible_oop(obj))
sspitsyn
parents:
10229
diff
changeset
|
2982 |
// ignore any objects that aren't visible to profiler |
7c8ab49996da
7130993: nsk/jdi/ReferenceType/instances/instances004 fails with JFR: assert(ServiceUtil::visible_oop(obj))
sspitsyn
parents:
10229
diff
changeset
|
2983 |
if (fld_o != NULL && ServiceUtil::visible_oop(fld_o)) { |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
2984 |
assert(Universe::heap()->is_in_reserved(fld_o), "unsafe code should not " |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
2985 |
"have references to Klass* anymore"); |
1 | 2986 |
int slot = field->field_index(); |
2987 |
if (!CallbackInvoker::report_field_reference(o, fld_o, slot)) { |
|
2988 |
return false; |
|
2989 |
} |
|
2990 |
} |
|
2991 |
} else { |
|
2992 |
if (is_reporting_primitive_fields()) { |
|
2993 |
// primitive instance field |
|
2994 |
address addr = (address)o + field->field_offset(); |
|
2995 |
int slot = field->field_index(); |
|
2996 |
if (!CallbackInvoker::report_primitive_instance_field(o, slot, addr, type)) { |
|
2997 |
return false; |
|
2998 |
} |
|
2999 |
} |
|
3000 |
} |
|
3001 |
} |
|
3002 |
||
3003 |
// if the object is a java.lang.String |
|
3004 |
if (is_reporting_string_values() && |
|
4571 | 3005 |
o->klass() == SystemDictionary::String_klass()) { |
1 | 3006 |
if (!CallbackInvoker::report_string_value(o)) { |
3007 |
return false; |
|
3008 |
} |
|
3009 |
} |
|
3010 |
return true; |
|
3011 |
} |
|
3012 |
||
3013 |
||
10229
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3014 |
// Collects all simple (non-stack) roots except for threads; |
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3015 |
// threads are handled in collect_stack_roots() as an optimization. |
1 | 3016 |
// if there's a heap root callback provided then the callback is |
3017 |
// invoked for each simple root. |
|
3018 |
// if an object reference callback is provided then all simple |
|
3019 |
// roots are pushed onto the marking stack so that they can be |
|
3020 |
// processed later |
|
3021 |
// |
|
3022 |
inline bool VM_HeapWalkOperation::collect_simple_roots() { |
|
3023 |
SimpleRootsClosure blk; |
|
3024 |
||
3025 |
// JNI globals |
|
3026 |
blk.set_kind(JVMTI_HEAP_REFERENCE_JNI_GLOBAL); |
|
3027 |
JNIHandles::oops_do(&blk); |
|
3028 |
if (blk.stopped()) { |
|
3029 |
return false; |
|
3030 |
} |
|
3031 |
||
3032 |
// Preloaded classes and loader from the system dictionary |
|
3033 |
blk.set_kind(JVMTI_HEAP_REFERENCE_SYSTEM_CLASS); |
|
3034 |
SystemDictionary::always_strong_oops_do(&blk); |
|
47580 | 3035 |
ClassLoaderDataGraph::always_strong_oops_do(&blk, false); |
1 | 3036 |
if (blk.stopped()) { |
3037 |
return false; |
|
3038 |
} |
|
3039 |
||
3040 |
// Inflated monitors |
|
3041 |
blk.set_kind(JVMTI_HEAP_REFERENCE_MONITOR); |
|
3042 |
ObjectSynchronizer::oops_do(&blk); |
|
3043 |
if (blk.stopped()) { |
|
3044 |
return false; |
|
3045 |
} |
|
3046 |
||
10229
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3047 |
// threads are now handled in collect_stack_roots() |
1 | 3048 |
|
3049 |
// Other kinds of roots maintained by HotSpot |
|
3050 |
// Many of these won't be visible but others (such as instances of important |
|
3051 |
// exceptions) will be visible. |
|
3052 |
blk.set_kind(JVMTI_HEAP_REFERENCE_OTHER); |
|
3053 |
Universe::oops_do(&blk); |
|
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
2105
diff
changeset
|
3054 |
|
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
2105
diff
changeset
|
3055 |
// If there are any non-perm roots in the code cache, visit them. |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
2105
diff
changeset
|
3056 |
blk.set_kind(JVMTI_HEAP_REFERENCE_OTHER); |
25492
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
3057 |
CodeBlobToOopClosure look_in_blobs(&blk, !CodeBlobToOopClosure::FixRelocations); |
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
2105
diff
changeset
|
3058 |
CodeCache::scavenge_root_nmethods_do(&look_in_blobs); |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
2105
diff
changeset
|
3059 |
|
1 | 3060 |
return true; |
3061 |
} |
|
3062 |
||
3063 |
// Walk the stack of a given thread and find all references (locals |
|
3064 |
// and JNI calls) and report these as stack references |
|
3065 |
inline bool VM_HeapWalkOperation::collect_stack_roots(JavaThread* java_thread, |
|
3066 |
JNILocalRootsClosure* blk) |
|
3067 |
{ |
|
3068 |
oop threadObj = java_thread->threadObj(); |
|
3069 |
assert(threadObj != NULL, "sanity check"); |
|
3070 |
||
3071 |
// only need to get the thread's tag once per thread |
|
3072 |
jlong thread_tag = tag_for(_tag_map, threadObj); |
|
3073 |
||
3074 |
// also need the thread id |
|
3075 |
jlong tid = java_lang_Thread::thread_id(threadObj); |
|
3076 |
||
3077 |
||
3078 |
if (java_thread->has_last_Java_frame()) { |
|
3079 |
||
3080 |
// vframes are resource allocated |
|
3081 |
Thread* current_thread = Thread::current(); |
|
3082 |
ResourceMark rm(current_thread); |
|
3083 |
HandleMark hm(current_thread); |
|
3084 |
||
3085 |
RegisterMap reg_map(java_thread); |
|
3086 |
frame f = java_thread->last_frame(); |
|
3087 |
vframe* vf = vframe::new_vframe(&f, ®_map, java_thread); |
|
3088 |
||
3089 |
bool is_top_frame = true; |
|
3090 |
int depth = 0; |
|
3091 |
frame* last_entry_frame = NULL; |
|
3092 |
||
3093 |
while (vf != NULL) { |
|
3094 |
if (vf->is_java_frame()) { |
|
3095 |
||
3096 |
// java frame (interpreted, compiled, ...) |
|
3097 |
javaVFrame *jvf = javaVFrame::cast(vf); |
|
3098 |
||
3099 |
// the jmethodID |
|
3100 |
jmethodID method = jvf->method()->jmethod_id(); |
|
3101 |
||
3102 |
if (!(jvf->method()->is_native())) { |
|
3103 |
jlocation bci = (jlocation)jvf->bci(); |
|
3104 |
StackValueCollection* locals = jvf->locals(); |
|
3105 |
for (int slot=0; slot<locals->size(); slot++) { |
|
3106 |
if (locals->at(slot)->type() == T_OBJECT) { |
|
3107 |
oop o = locals->obj_at(slot)(); |
|
3108 |
if (o == NULL) { |
|
3109 |
continue; |
|
3110 |
} |
|
3111 |
||
3112 |
// stack reference |
|
3113 |
if (!CallbackInvoker::report_stack_ref_root(thread_tag, tid, depth, method, |
|
3114 |
bci, slot, o)) { |
|
3115 |
return false; |
|
3116 |
} |
|
3117 |
} |
|
3118 |
} |
|
22895
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3119 |
|
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3120 |
StackValueCollection* exprs = jvf->expressions(); |
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3121 |
for (int index=0; index < exprs->size(); index++) { |
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3122 |
if (exprs->at(index)->type() == T_OBJECT) { |
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3123 |
oop o = exprs->obj_at(index)(); |
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3124 |
if (o == NULL) { |
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3125 |
continue; |
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3126 |
} |
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3127 |
|
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3128 |
// stack reference |
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3129 |
if (!CallbackInvoker::report_stack_ref_root(thread_tag, tid, depth, method, |
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3130 |
bci, locals->size() + index, o)) { |
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3131 |
return false; |
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3132 |
} |
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3133 |
} |
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3134 |
} |
52fbddf39901
8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
sspitsyn
parents:
22741
diff
changeset
|
3135 |
|
40662
6e951c9e7318
8038797: JVMTI FollowReferences does not report roots reachable from nmethods
coleenp
parents:
37993
diff
changeset
|
3136 |
// Follow oops from compiled nmethod |
6e951c9e7318
8038797: JVMTI FollowReferences does not report roots reachable from nmethods
coleenp
parents:
37993
diff
changeset
|
3137 |
if (jvf->cb() != NULL && jvf->cb()->is_nmethod()) { |
6e951c9e7318
8038797: JVMTI FollowReferences does not report roots reachable from nmethods
coleenp
parents:
37993
diff
changeset
|
3138 |
blk->set_context(thread_tag, tid, depth, method); |
6e951c9e7318
8038797: JVMTI FollowReferences does not report roots reachable from nmethods
coleenp
parents:
37993
diff
changeset
|
3139 |
jvf->cb()->as_nmethod()->oops_do(blk); |
6e951c9e7318
8038797: JVMTI FollowReferences does not report roots reachable from nmethods
coleenp
parents:
37993
diff
changeset
|
3140 |
} |
1 | 3141 |
} else { |
3142 |
blk->set_context(thread_tag, tid, depth, method); |
|
3143 |
if (is_top_frame) { |
|
3144 |
// JNI locals for the top frame. |
|
3145 |
java_thread->active_handles()->oops_do(blk); |
|
3146 |
} else { |
|
3147 |
if (last_entry_frame != NULL) { |
|
3148 |
// JNI locals for the entry frame |
|
3149 |
assert(last_entry_frame->is_entry_frame(), "checking"); |
|
3150 |
last_entry_frame->entry_frame_call_wrapper()->handles()->oops_do(blk); |
|
3151 |
} |
|
3152 |
} |
|
3153 |
} |
|
3154 |
last_entry_frame = NULL; |
|
3155 |
depth++; |
|
3156 |
} else { |
|
3157 |
// externalVFrame - for an entry frame then we report the JNI locals |
|
3158 |
// when we find the corresponding javaVFrame |
|
3159 |
frame* fr = vf->frame_pointer(); |
|
3160 |
assert(fr != NULL, "sanity check"); |
|
3161 |
if (fr->is_entry_frame()) { |
|
3162 |
last_entry_frame = fr; |
|
3163 |
} |
|
3164 |
} |
|
3165 |
||
3166 |
vf = vf->sender(); |
|
3167 |
is_top_frame = false; |
|
3168 |
} |
|
3169 |
} else { |
|
3170 |
// no last java frame but there may be JNI locals |
|
3171 |
blk->set_context(thread_tag, tid, 0, (jmethodID)NULL); |
|
3172 |
java_thread->active_handles()->oops_do(blk); |
|
3173 |
} |
|
3174 |
return true; |
|
3175 |
} |
|
3176 |
||
3177 |
||
10229
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3178 |
// Collects the simple roots for all threads and collects all |
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3179 |
// stack roots - for each thread it walks the execution |
1 | 3180 |
// stack to find all references and local JNI refs. |
3181 |
inline bool VM_HeapWalkOperation::collect_stack_roots() { |
|
3182 |
JNILocalRootsClosure blk; |
|
48105
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47765
diff
changeset
|
3183 |
for (JavaThreadIteratorWithHandle jtiwh; JavaThread *thread = jtiwh.next(); ) { |
1 | 3184 |
oop threadObj = thread->threadObj(); |
3185 |
if (threadObj != NULL && !thread->is_exiting() && !thread->is_hidden_from_external_view()) { |
|
10229
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3186 |
// Collect the simple root for this thread before we |
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3187 |
// collect its stack roots |
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3188 |
if (!CallbackInvoker::report_simple_root(JVMTI_HEAP_REFERENCE_THREAD, |
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3189 |
threadObj)) { |
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3190 |
return false; |
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3191 |
} |
1 | 3192 |
if (!collect_stack_roots(thread, &blk)) { |
3193 |
return false; |
|
3194 |
} |
|
3195 |
} |
|
3196 |
} |
|
3197 |
return true; |
|
3198 |
} |
|
3199 |
||
3200 |
// visit an object |
|
3201 |
// first mark the object as visited |
|
3202 |
// second get all the outbound references from this object (in other words, all |
|
3203 |
// the objects referenced by this object). |
|
3204 |
// |
|
3205 |
bool VM_HeapWalkOperation::visit(oop o) { |
|
3206 |
// mark object as visited |
|
3207 |
assert(!ObjectMarker::visited(o), "can't visit same object more than once"); |
|
3208 |
ObjectMarker::mark(o); |
|
3209 |
||
3210 |
// instance |
|
3211 |
if (o->is_instance()) { |
|
4571 | 3212 |
if (o->klass() == SystemDictionary::Class_klass()) { |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
3213 |
if (!java_lang_Class::is_primitive(o)) { |
1 | 3214 |
// a java.lang.Class |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
3215 |
return iterate_over_class(o); |
1 | 3216 |
} |
3217 |
} else { |
|
3218 |
return iterate_over_object(o); |
|
3219 |
} |
|
3220 |
} |
|
3221 |
||
3222 |
// object array |
|
3223 |
if (o->is_objArray()) { |
|
3224 |
return iterate_over_array(o); |
|
3225 |
} |
|
3226 |
||
3227 |
// type array |
|
3228 |
if (o->is_typeArray()) { |
|
3229 |
return iterate_over_type_array(o); |
|
3230 |
} |
|
3231 |
||
3232 |
return true; |
|
3233 |
} |
|
3234 |
||
3235 |
void VM_HeapWalkOperation::doit() { |
|
3236 |
ResourceMark rm; |
|
3237 |
ObjectMarkerController marker; |
|
3238 |
ClassFieldMapCacheMark cm; |
|
3239 |
||
3240 |
assert(visit_stack()->is_empty(), "visit stack must be empty"); |
|
3241 |
||
3242 |
// the heap walk starts with an initial object or the heap roots |
|
3243 |
if (initial_object().is_null()) { |
|
10228 | 3244 |
// If either collect_stack_roots() or collect_simple_roots() |
3245 |
// returns false at this point, then there are no mark bits |
|
3246 |
// to reset. |
|
3247 |
ObjectMarker::set_needs_reset(false); |
|
3248 |
||
10229
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3249 |
// Calling collect_stack_roots() before collect_simple_roots() |
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3250 |
// can result in a big performance boost for an agent that is |
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3251 |
// focused on analyzing references in the thread stacks. |
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3252 |
if (!collect_stack_roots()) return; |
7b358d5def21
6951623: 3/3 possible performance problems in FollowReferences() and GetObjectsWithTags()
dcubed
parents:
10228
diff
changeset
|
3253 |
|
1 | 3254 |
if (!collect_simple_roots()) return; |
10228 | 3255 |
|
3256 |
// no early return so enable heap traversal to reset the mark bits |
|
3257 |
ObjectMarker::set_needs_reset(true); |
|
1 | 3258 |
} else { |
3259 |
visit_stack()->push(initial_object()()); |
|
3260 |
} |
|
3261 |
||
3262 |
// object references required |
|
3263 |
if (is_following_references()) { |
|
3264 |
||
3265 |
// visit each object until all reachable objects have been |
|
3266 |
// visited or the callback asked to terminate the iteration. |
|
3267 |
while (!visit_stack()->is_empty()) { |
|
3268 |
oop o = visit_stack()->pop(); |
|
3269 |
if (!ObjectMarker::visited(o)) { |
|
3270 |
if (!visit(o)) { |
|
3271 |
break; |
|
3272 |
} |
|
3273 |
} |
|
3274 |
} |
|
3275 |
} |
|
3276 |
} |
|
3277 |
||
3278 |
// iterate over all objects that are reachable from a set of roots |
|
3279 |
void JvmtiTagMap::iterate_over_reachable_objects(jvmtiHeapRootCallback heap_root_callback, |
|
3280 |
jvmtiStackReferenceCallback stack_ref_callback, |
|
3281 |
jvmtiObjectReferenceCallback object_ref_callback, |
|
3282 |
const void* user_data) { |
|
3283 |
MutexLocker ml(Heap_lock); |
|
3284 |
BasicHeapWalkContext context(heap_root_callback, stack_ref_callback, object_ref_callback); |
|
3285 |
VM_HeapWalkOperation op(this, Handle(), context, user_data); |
|
3286 |
VMThread::execute(&op); |
|
3287 |
} |
|
3288 |
||
3289 |
// iterate over all objects that are reachable from a given object |
|
3290 |
void JvmtiTagMap::iterate_over_objects_reachable_from_object(jobject object, |
|
3291 |
jvmtiObjectReferenceCallback object_ref_callback, |
|
3292 |
const void* user_data) { |
|
3293 |
oop obj = JNIHandles::resolve(object); |
|
3294 |
Handle initial_object(Thread::current(), obj); |
|
3295 |
||
3296 |
MutexLocker ml(Heap_lock); |
|
3297 |
BasicHeapWalkContext context(NULL, NULL, object_ref_callback); |
|
3298 |
VM_HeapWalkOperation op(this, initial_object, context, user_data); |
|
3299 |
VMThread::execute(&op); |
|
3300 |
} |
|
3301 |
||
3302 |
// follow references from an initial object or the GC roots |
|
3303 |
void JvmtiTagMap::follow_references(jint heap_filter, |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
43944
diff
changeset
|
3304 |
Klass* klass, |
1 | 3305 |
jobject object, |
3306 |
const jvmtiHeapCallbacks* callbacks, |
|
3307 |
const void* user_data) |
|
3308 |
{ |
|
3309 |
oop obj = JNIHandles::resolve(object); |
|
3310 |
Handle initial_object(Thread::current(), obj); |
|
3311 |
||
3312 |
MutexLocker ml(Heap_lock); |
|
3313 |
AdvancedHeapWalkContext context(heap_filter, klass, callbacks); |
|
3314 |
VM_HeapWalkOperation op(this, initial_object, context, user_data); |
|
3315 |
VMThread::execute(&op); |
|
3316 |
} |
|
3317 |
||
3318 |
||
32817
acc2744fd84b
8136627: Backout JDK-8133818 Additional number of processed references printed with -XX:+PrintReferenceGC after JDK-8047125
kbarrett
parents:
32607
diff
changeset
|
3319 |
void JvmtiTagMap::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) { |
7916
84e5b29decb0
7012493: 2/2 6849574/Test.java fails with Internal Error (src/share/vm/prims/jvmtiTagMap.cpp:3294)
dcubed
parents:
7896
diff
changeset
|
3320 |
// No locks during VM bring-up (0 threads) and no safepoints after main |
84e5b29decb0
7012493: 2/2 6849574/Test.java fails with Internal Error (src/share/vm/prims/jvmtiTagMap.cpp:3294)
dcubed
parents:
7896
diff
changeset
|
3321 |
// thread creation and before VMThread creation (1 thread); initial GC |
84e5b29decb0
7012493: 2/2 6849574/Test.java fails with Internal Error (src/share/vm/prims/jvmtiTagMap.cpp:3294)
dcubed
parents:
7896
diff
changeset
|
3322 |
// verification can happen in that window which gets to here. |
84e5b29decb0
7012493: 2/2 6849574/Test.java fails with Internal Error (src/share/vm/prims/jvmtiTagMap.cpp:3294)
dcubed
parents:
7896
diff
changeset
|
3323 |
assert(Threads::number_of_threads() <= 1 || |
84e5b29decb0
7012493: 2/2 6849574/Test.java fails with Internal Error (src/share/vm/prims/jvmtiTagMap.cpp:3294)
dcubed
parents:
7896
diff
changeset
|
3324 |
SafepointSynchronize::is_at_safepoint(), |
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3325 |
"must be executed at a safepoint"); |
1 | 3326 |
if (JvmtiEnv::environments_might_exist()) { |
3327 |
JvmtiEnvIterator it; |
|
3328 |
for (JvmtiEnvBase* env = it.first(); env != NULL; env = it.next(env)) { |
|
3329 |
JvmtiTagMap* tag_map = env->tag_map(); |
|
3330 |
if (tag_map != NULL && !tag_map->is_empty()) { |
|
32817
acc2744fd84b
8136627: Backout JDK-8133818 Additional number of processed references printed with -XX:+PrintReferenceGC after JDK-8047125
kbarrett
parents:
32607
diff
changeset
|
3331 |
tag_map->do_weak_oops(is_alive, f); |
1 | 3332 |
} |
3333 |
} |
|
3334 |
} |
|
3335 |
} |
|
3336 |
||
32817
acc2744fd84b
8136627: Backout JDK-8133818 Additional number of processed references printed with -XX:+PrintReferenceGC after JDK-8047125
kbarrett
parents:
32607
diff
changeset
|
3337 |
void JvmtiTagMap::do_weak_oops(BoolObjectClosure* is_alive, OopClosure* f) { |
1 | 3338 |
|
3339 |
// does this environment have the OBJECT_FREE event enabled |
|
3340 |
bool post_object_free = env()->is_enabled(JVMTI_EVENT_OBJECT_FREE); |
|
3341 |
||
3342 |
// counters used for trace message |
|
32817
acc2744fd84b
8136627: Backout JDK-8133818 Additional number of processed references printed with -XX:+PrintReferenceGC after JDK-8047125
kbarrett
parents:
32607
diff
changeset
|
3343 |
int freed = 0; |
acc2744fd84b
8136627: Backout JDK-8133818 Additional number of processed references printed with -XX:+PrintReferenceGC after JDK-8047125
kbarrett
parents:
32607
diff
changeset
|
3344 |
int moved = 0; |
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3345 |
|
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3346 |
JvmtiTagHashmap* hashmap = this->hashmap(); |
1 | 3347 |
|
3348 |
// reenable sizing (if disabled) |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3349 |
hashmap->set_resizing_enabled(true); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3350 |
|
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3351 |
// if the hashmap is empty then we can skip it |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3352 |
if (hashmap->_entry_count == 0) { |
32817
acc2744fd84b
8136627: Backout JDK-8133818 Additional number of processed references printed with -XX:+PrintReferenceGC after JDK-8047125
kbarrett
parents:
32607
diff
changeset
|
3353 |
return; |
1 | 3354 |
} |
3355 |
||
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3356 |
// now iterate through each entry in the table |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3357 |
|
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3358 |
JvmtiTagHashmapEntry** table = hashmap->table(); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3359 |
int size = hashmap->size(); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3360 |
|
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3361 |
JvmtiTagHashmapEntry* delayed_add = NULL; |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3362 |
|
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3363 |
for (int pos = 0; pos < size; ++pos) { |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3364 |
JvmtiTagHashmapEntry* entry = table[pos]; |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3365 |
JvmtiTagHashmapEntry* prev = NULL; |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3366 |
|
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3367 |
while (entry != NULL) { |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3368 |
JvmtiTagHashmapEntry* next = entry->next(); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3369 |
|
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3370 |
// has object been GC'ed |
48616
80239a242d34
8191894: Refactor weak references in JvmtiTagHashmap to use the Access API
eosterlund
parents:
48105
diff
changeset
|
3371 |
if (!is_alive->do_object_b(entry->object_peek())) { |
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3372 |
// grab the tag |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3373 |
jlong tag = entry->tag(); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3374 |
guarantee(tag != 0, "checking"); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3375 |
|
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3376 |
// remove GC'ed entry from hashmap and return the |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3377 |
// entry to the free list |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3378 |
hashmap->remove(prev, pos, entry); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3379 |
destroy_entry(entry); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3380 |
|
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3381 |
// post the event to the profiler |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3382 |
if (post_object_free) { |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3383 |
JvmtiExport::post_object_free(env(), tag); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3384 |
} |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3385 |
|
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3386 |
++freed; |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3387 |
} else { |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3388 |
f->do_oop(entry->object_addr()); |
48616
80239a242d34
8191894: Refactor weak references in JvmtiTagHashmap to use the Access API
eosterlund
parents:
48105
diff
changeset
|
3389 |
oop new_oop = entry->object_peek(); |
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3390 |
|
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3391 |
// if the object has moved then re-hash it and move its |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3392 |
// entry to its new location. |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3393 |
unsigned int new_pos = JvmtiTagHashmap::hash(new_oop, size); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3394 |
if (new_pos != (unsigned int)pos) { |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3395 |
if (prev == NULL) { |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3396 |
table[pos] = next; |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3397 |
} else { |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3398 |
prev->set_next(next); |
1 | 3399 |
} |
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3400 |
if (new_pos < (unsigned int)pos) { |
1 | 3401 |
entry->set_next(table[new_pos]); |
3402 |
table[new_pos] = entry; |
|
3403 |
} else { |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3404 |
// Delay adding this entry to it's new position as we'd end up |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3405 |
// hitting it again during this iteration. |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3406 |
entry->set_next(delayed_add); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3407 |
delayed_add = entry; |
1 | 3408 |
} |
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3409 |
moved++; |
1 | 3410 |
} else { |
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3411 |
// object didn't move |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3412 |
prev = entry; |
1 | 3413 |
} |
3414 |
} |
|
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3415 |
|
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3416 |
entry = next; |
1 | 3417 |
} |
3418 |
} |
|
3419 |
||
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3420 |
// Re-add all the entries which were kept aside |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3421 |
while (delayed_add != NULL) { |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3422 |
JvmtiTagHashmapEntry* next = delayed_add->next(); |
48616
80239a242d34
8191894: Refactor weak references in JvmtiTagHashmap to use the Access API
eosterlund
parents:
48105
diff
changeset
|
3423 |
unsigned int pos = JvmtiTagHashmap::hash(delayed_add->object_peek(), size); |
7896
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3424 |
delayed_add->set_next(table[pos]); |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3425 |
table[pos] = delayed_add; |
08aadd7aa3ee
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
7397
diff
changeset
|
3426 |
delayed_add = next; |
1 | 3427 |
} |
3428 |
||
37993 | 3429 |
log_debug(jvmti, objecttagging)("(%d->%d, %d freed, %d total moves)", |
3430 |
hashmap->_entry_count + freed, hashmap->_entry_count, freed, moved); |
|
1 | 3431 |
} |