1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_OPENJDKJVMTI_TI_HEAP_H_ 18 #define ART_OPENJDKJVMTI_TI_HEAP_H_ 19 20 #include <unordered_map> 21 22 #include "jvmti.h" 23 24 #include "base/locks.h" 25 26 namespace art { 27 class Thread; 28 template<typename T> class ObjPtr; 29 class HashObjPtr; 30 namespace mirror { 31 class Object; 32 } // namespace mirror 33 } // namespace art 34 35 namespace openjdkjvmti { 36 37 class EventHandler; 38 class ObjectTagTable; 39 40 class HeapUtil { 41 public: HeapUtil(ObjectTagTable * tags)42 explicit HeapUtil(ObjectTagTable* tags) : tags_(tags) { 43 } 44 45 jvmtiError GetLoadedClasses(jvmtiEnv* env, jint* class_count_ptr, jclass** classes_ptr); 46 47 jvmtiError IterateOverInstancesOfClass(jvmtiEnv* env, 48 jclass klass, 49 jvmtiHeapObjectFilter filter, 50 jvmtiHeapObjectCallback cb, 51 const void* user_data); 52 53 jvmtiError IterateThroughHeap(jvmtiEnv* env, 54 jint heap_filter, 55 jclass klass, 56 const jvmtiHeapCallbacks* callbacks, 57 const void* user_data); 58 59 jvmtiError FollowReferences(jvmtiEnv* env, 60 jint heap_filter, 61 jclass klass, 62 jobject initial_object, 63 const jvmtiHeapCallbacks* callbacks, 64 const void* user_data); 65 66 static jvmtiError ForceGarbageCollection(jvmtiEnv* env); 67 GetTags()68 ObjectTagTable* GetTags() { 69 return tags_; 70 } 71 72 static void Register(); 73 static void Unregister(); 74 75 private: 76 ObjectTagTable* tags_; 77 }; 78 79 class HeapExtensions { 80 public: 81 static void Register(EventHandler* eh); 82 83 static jvmtiError JNICALL GetObjectHeapId(jvmtiEnv* env, jlong tag, jint* heap_id, ...); 84 static jvmtiError JNICALL GetHeapName(jvmtiEnv* env, jint heap_id, char** heap_name, ...); 85 86 static jvmtiError JNICALL IterateThroughHeapExt(jvmtiEnv* env, 87 jint heap_filter, 88 jclass klass, 89 const jvmtiHeapCallbacks* callbacks, 90 const void* user_data); 91 92 static jvmtiError JNICALL ChangeArraySize(jvmtiEnv* env, jobject arr, jsize new_size); 93 94 static void ReplaceReferences( 95 art::Thread* self, 96 const std::unordered_map<art::ObjPtr<art::mirror::Object>, 97 art::ObjPtr<art::mirror::Object>, 98 art::HashObjPtr>& refs) 99 REQUIRES(art::Locks::mutator_lock_, art::Roles::uninterruptible_); 100 101 static void ReplaceReference(art::Thread* self, 102 art::ObjPtr<art::mirror::Object> original, 103 art::ObjPtr<art::mirror::Object> replacement) 104 REQUIRES(art::Locks::mutator_lock_, 105 art::Roles::uninterruptible_); 106 107 private: 108 static EventHandler* gEventHandler; 109 }; 110 111 } // namespace openjdkjvmti 112 113 #endif // ART_OPENJDKJVMTI_TI_HEAP_H_ 114