object_registry.cc revision 692063955ae845d8bd9fa2d22a50a1e06513bdcf
164f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes/* 264f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes * Copyright (C) 2013 The Android Open Source Project 364f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes * 464f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes * Licensed under the Apache License, Version 2.0 (the "License"); 564f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes * you may not use this file except in compliance with the License. 664f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes * You may obtain a copy of the License at 764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes * 864f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes * http://www.apache.org/licenses/LICENSE-2.0 964f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes * 1064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes * Unless required by applicable law or agreed to in writing, software 1164f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes * distributed under the License is distributed on an "AS IS" BASIS, 1264f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1364f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes * See the License for the specific language governing permissions and 1464f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes * limitations under the License. 1564f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes */ 1664f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 1764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes#include "object_registry.h" 1864f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 19e2d628b5b0a1b9c29c173f3cbad3ef6cb6c24d2dSebastien Hertz#include "handle_scope-inl.h" 206a3c1fcb4ba42ad4d5d142c17a3712a6ddd3866fIan Rogers#include "jni_internal.h" 21e63db27db913f1a88e2095a1ee8239b2bb9124e8Ian Rogers#include "mirror/class.h" 2264f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes#include "scoped_thread_state_change.h" 2364f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 2464f574f474aa77c72778640ab21f8cfa72546812Elliott Hughesnamespace art { 2564f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 2664f574f474aa77c72778640ab21f8cfa72546812Elliott Hughesstd::ostream& operator<<(std::ostream& os, const ObjectRegistryEntry& rhs) { 2764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes os << "ObjectRegistryEntry[" << rhs.jni_reference_type 2864f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes << ",reference=" << rhs.jni_reference 2964f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes << ",count=" << rhs.reference_count 3064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes << ",id=" << rhs.id << "]"; 3164f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes return os; 3264f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} 3364f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 340f827169742aad6209d830db773a101849c32a83Elliott HughesObjectRegistry::ObjectRegistry() 35b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi : lock_("ObjectRegistry lock", kJdwpObjectRegistryLock), next_id_(1) { 3664f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} 3764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 3864f574f474aa77c72778640ab21f8cfa72546812Elliott HughesJDWP::RefTypeId ObjectRegistry::AddRefType(mirror::Class* c) { 3964f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes return InternalAdd(c); 4064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} 4164f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 4264f574f474aa77c72778640ab21f8cfa72546812Elliott HughesJDWP::ObjectId ObjectRegistry::Add(mirror::Object* o) { 4364f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes return InternalAdd(o); 4464f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} 4564f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 4664f574f474aa77c72778640ab21f8cfa72546812Elliott HughesJDWP::ObjectId ObjectRegistry::InternalAdd(mirror::Object* o) { 47b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi if (o == nullptr) { 4864f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes return 0; 4964f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes } 5064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 51e2d628b5b0a1b9c29c173f3cbad3ef6cb6c24d2dSebastien Hertz Thread* const self = Thread::Current(); 52e4266c511ffe6a1ed472292bea06881dcbf06f7aSebastien Hertz self->AssertNoPendingException(); 53692063955ae845d8bd9fa2d22a50a1e06513bdcfSebastien Hertz // Object::IdentityHashCode may cause these locks to be held so check we do not already 54692063955ae845d8bd9fa2d22a50a1e06513bdcfSebastien Hertz // hold them. 55692063955ae845d8bd9fa2d22a50a1e06513bdcfSebastien Hertz Locks::thread_list_lock_->AssertNotHeld(self); 56692063955ae845d8bd9fa2d22a50a1e06513bdcfSebastien Hertz Locks::thread_suspend_count_lock_->AssertNotHeld(self); 57e4266c511ffe6a1ed472292bea06881dcbf06f7aSebastien Hertz 58e2d628b5b0a1b9c29c173f3cbad3ef6cb6c24d2dSebastien Hertz StackHandleScope<1> hs(self); 59e2d628b5b0a1b9c29c173f3cbad3ef6cb6c24d2dSebastien Hertz Handle<mirror::Object> obj_h(hs.NewHandle(o)); 60e2d628b5b0a1b9c29c173f3cbad3ef6cb6c24d2dSebastien Hertz 61b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi // Call IdentityHashCode here to avoid a lock level violation between lock_ and monitor_lock. 62e2d628b5b0a1b9c29c173f3cbad3ef6cb6c24d2dSebastien Hertz int32_t identity_hash_code = obj_h->IdentityHashCode(); 63e2d628b5b0a1b9c29c173f3cbad3ef6cb6c24d2dSebastien Hertz 64e2d628b5b0a1b9c29c173f3cbad3ef6cb6c24d2dSebastien Hertz ScopedObjectAccessUnchecked soa(self); 6564f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes MutexLock mu(soa.Self(), lock_); 66b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi ObjectRegistryEntry* entry = nullptr; 67e2d628b5b0a1b9c29c173f3cbad3ef6cb6c24d2dSebastien Hertz if (ContainsLocked(soa.Self(), obj_h.Get(), identity_hash_code, &entry)) { 68412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier // This object was already in our map. 69412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier ++entry->reference_count; 70412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier } else { 71412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier entry = new ObjectRegistryEntry; 72412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier entry->jni_reference_type = JNIWeakGlobalRefType; 73412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier entry->jni_reference = nullptr; 74412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier entry->reference_count = 0; 75412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier entry->id = 0; 76b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi entry->identity_hash_code = identity_hash_code; 77b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi object_to_entry_.insert(std::make_pair(identity_hash_code, entry)); 7864f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 79412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier // This object isn't in the registry yet, so add it. 80412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier JNIEnv* env = soa.Env(); 8164f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 82e2d628b5b0a1b9c29c173f3cbad3ef6cb6c24d2dSebastien Hertz jobject local_reference = soa.AddLocalReference<jobject>(obj_h.Get()); 8364f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 84412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier entry->jni_reference_type = JNIWeakGlobalRefType; 85412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier entry->jni_reference = env->NewWeakGlobalRef(local_reference); 86412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier entry->reference_count = 1; 87412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier entry->id = next_id_++; 8864f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 89412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier id_to_entry_.Put(entry->id, entry); 9064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 91412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier env->DeleteLocalRef(local_reference); 92412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier } 93412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier return entry->id; 9464f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} 9564f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 96b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchibool ObjectRegistry::ContainsLocked(Thread* self, mirror::Object* o, int32_t identity_hash_code, 97b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi ObjectRegistryEntry** out_entry) { 98b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi DCHECK(o != nullptr); 99b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi for (auto it = object_to_entry_.lower_bound(identity_hash_code), end = object_to_entry_.end(); 100b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi it != end && it->first == identity_hash_code; ++it) { 101b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi ObjectRegistryEntry* entry = it->second; 102b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi if (o == self->DecodeJObject(entry->jni_reference)) { 103b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi if (out_entry != nullptr) { 104b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi *out_entry = entry; 105b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi } 106b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi return true; 107b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi } 108b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi } 109b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi return false; 11064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} 11164f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 11264f574f474aa77c72778640ab21f8cfa72546812Elliott Hughesvoid ObjectRegistry::Clear() { 11355f6534f260ec82ef2d69a0667b1883f13d11399Sebastien Hertz Thread* const self = Thread::Current(); 11455f6534f260ec82ef2d69a0667b1883f13d11399Sebastien Hertz 11555f6534f260ec82ef2d69a0667b1883f13d11399Sebastien Hertz // We must not hold the mutator lock exclusively if we want to delete weak global 11655f6534f260ec82ef2d69a0667b1883f13d11399Sebastien Hertz // references. Otherwise this can lead to a deadlock with a running GC: 11755f6534f260ec82ef2d69a0667b1883f13d11399Sebastien Hertz // 1. GC thread disables access to weak global references, then releases 11855f6534f260ec82ef2d69a0667b1883f13d11399Sebastien Hertz // mutator lock. 11955f6534f260ec82ef2d69a0667b1883f13d11399Sebastien Hertz // 2. JDWP thread takes mutator lock exclusively after suspending all 12055f6534f260ec82ef2d69a0667b1883f13d11399Sebastien Hertz // threads. 12155f6534f260ec82ef2d69a0667b1883f13d11399Sebastien Hertz // 3. GC thread waits for shared mutator lock which is held by JDWP 12255f6534f260ec82ef2d69a0667b1883f13d11399Sebastien Hertz // thread. 12355f6534f260ec82ef2d69a0667b1883f13d11399Sebastien Hertz // 4. JDWP thread clears weak global references but need to wait for GC 12455f6534f260ec82ef2d69a0667b1883f13d11399Sebastien Hertz // thread to re-enable access to them. 12555f6534f260ec82ef2d69a0667b1883f13d11399Sebastien Hertz Locks::mutator_lock_->AssertNotExclusiveHeld(self); 12655f6534f260ec82ef2d69a0667b1883f13d11399Sebastien Hertz 12764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes MutexLock mu(self, lock_); 12864f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes VLOG(jdwp) << "Object registry contained " << object_to_entry_.size() << " entries"; 12964f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes // Delete all the JNI references. 13064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes JNIEnv* env = self->GetJniEnv(); 131412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier for (const auto& pair : object_to_entry_) { 132a032870e19e4a6c8d62b7dab806261006fa711eeSebastien Hertz const ObjectRegistryEntry* entry = pair.second; 133a032870e19e4a6c8d62b7dab806261006fa711eeSebastien Hertz if (entry->jni_reference_type == JNIWeakGlobalRefType) { 134a032870e19e4a6c8d62b7dab806261006fa711eeSebastien Hertz env->DeleteWeakGlobalRef(entry->jni_reference); 13564f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes } else { 136a032870e19e4a6c8d62b7dab806261006fa711eeSebastien Hertz env->DeleteGlobalRef(entry->jni_reference); 13764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes } 138a032870e19e4a6c8d62b7dab806261006fa711eeSebastien Hertz delete entry; 13964f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes } 14064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes // Clear the maps. 14164f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes object_to_entry_.clear(); 14264f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes id_to_entry_.clear(); 14364f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} 14464f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 145c0542af3e2170143ba40d89136e284997e16bf64Ian Rogersmirror::Object* ObjectRegistry::InternalGet(JDWP::ObjectId id, JDWP::JdwpError* error) { 14664f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes Thread* self = Thread::Current(); 14764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes MutexLock mu(self, lock_); 148412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier auto it = id_to_entry_.find(id); 14964f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes if (it == id_to_entry_.end()) { 150c0542af3e2170143ba40d89136e284997e16bf64Ian Rogers *error = JDWP::ERR_INVALID_OBJECT; 151c0542af3e2170143ba40d89136e284997e16bf64Ian Rogers return nullptr; 15264f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes } 153412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier ObjectRegistryEntry& entry = *it->second; 154c0542af3e2170143ba40d89136e284997e16bf64Ian Rogers *error = JDWP::ERR_NONE; 15564f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes return self->DecodeJObject(entry.jni_reference); 15664f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} 15764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 158449db33fafa29578df60e8a323f78d5eb6247e76Jeff Haojobject ObjectRegistry::GetJObject(JDWP::ObjectId id) { 1590630ab5239a7d7be24dedbc3f66c822332446fc3Sebastien Hertz if (id == 0) { 1607d95565c84d91ae5dcec4b89728ada208633de0cSebastien Hertz return nullptr; 1610630ab5239a7d7be24dedbc3f66c822332446fc3Sebastien Hertz } 162449db33fafa29578df60e8a323f78d5eb6247e76Jeff Hao Thread* self = Thread::Current(); 163449db33fafa29578df60e8a323f78d5eb6247e76Jeff Hao MutexLock mu(self, lock_); 164412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier auto it = id_to_entry_.find(id); 165449db33fafa29578df60e8a323f78d5eb6247e76Jeff Hao CHECK(it != id_to_entry_.end()) << id; 166412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier ObjectRegistryEntry& entry = *it->second; 167449db33fafa29578df60e8a323f78d5eb6247e76Jeff Hao return entry.jni_reference; 168449db33fafa29578df60e8a323f78d5eb6247e76Jeff Hao} 169449db33fafa29578df60e8a323f78d5eb6247e76Jeff Hao 17064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughesvoid ObjectRegistry::DisableCollection(JDWP::ObjectId id) { 17164f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes Thread* self = Thread::Current(); 17264f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes MutexLock mu(self, lock_); 173412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier auto it = id_to_entry_.find(id); 174e96060aa2483529d087031f7cdcc0405f1ef9218Sebastien Hertz CHECK(it != id_to_entry_.end()); 175412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier Promote(*it->second); 17664f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} 17764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 17864f574f474aa77c72778640ab21f8cfa72546812Elliott Hughesvoid ObjectRegistry::EnableCollection(JDWP::ObjectId id) { 17964f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes Thread* self = Thread::Current(); 18064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes MutexLock mu(self, lock_); 181412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier auto it = id_to_entry_.find(id); 182e96060aa2483529d087031f7cdcc0405f1ef9218Sebastien Hertz CHECK(it != id_to_entry_.end()); 183412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier Demote(*it->second); 18464f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} 18564f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 18664f574f474aa77c72778640ab21f8cfa72546812Elliott Hughesvoid ObjectRegistry::Demote(ObjectRegistryEntry& entry) { 18764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes if (entry.jni_reference_type == JNIGlobalRefType) { 18864f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes Thread* self = Thread::Current(); 18964f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes JNIEnv* env = self->GetJniEnv(); 19064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes jobject global = entry.jni_reference; 19164f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes entry.jni_reference = env->NewWeakGlobalRef(entry.jni_reference); 19264f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes entry.jni_reference_type = JNIWeakGlobalRefType; 19364f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes env->DeleteGlobalRef(global); 19464f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes } 19564f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} 19664f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 19764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughesvoid ObjectRegistry::Promote(ObjectRegistryEntry& entry) { 19864f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes if (entry.jni_reference_type == JNIWeakGlobalRefType) { 19964f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes Thread* self = Thread::Current(); 20064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes JNIEnv* env = self->GetJniEnv(); 20164f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes jobject weak = entry.jni_reference; 20264f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes entry.jni_reference = env->NewGlobalRef(entry.jni_reference); 20364f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes entry.jni_reference_type = JNIGlobalRefType; 20464f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes env->DeleteWeakGlobalRef(weak); 20564f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes } 20664f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} 20764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 20864f574f474aa77c72778640ab21f8cfa72546812Elliott Hughesbool ObjectRegistry::IsCollected(JDWP::ObjectId id) { 20964f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes Thread* self = Thread::Current(); 21064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes MutexLock mu(self, lock_); 211412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier auto it = id_to_entry_.find(id); 212e96060aa2483529d087031f7cdcc0405f1ef9218Sebastien Hertz CHECK(it != id_to_entry_.end()); 213412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier ObjectRegistryEntry& entry = *it->second; 21464f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes if (entry.jni_reference_type == JNIWeakGlobalRefType) { 21564f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes JNIEnv* env = self->GetJniEnv(); 2167d95565c84d91ae5dcec4b89728ada208633de0cSebastien Hertz return env->IsSameObject(entry.jni_reference, nullptr); // Has the jweak been collected? 21764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes } else { 2187934ac288acfb2552bb0b06ec1f61e5820d924a4Brian Carlstrom return false; // We hold a strong reference, so we know this is live. 21964f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes } 22064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} 22164f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 22264f574f474aa77c72778640ab21f8cfa72546812Elliott Hughesvoid ObjectRegistry::DisposeObject(JDWP::ObjectId id, uint32_t reference_count) { 22364f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes Thread* self = Thread::Current(); 22464f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes MutexLock mu(self, lock_); 225412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier auto it = id_to_entry_.find(id); 22664f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes if (it == id_to_entry_.end()) { 22764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes return; 22864f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes } 229412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier ObjectRegistryEntry* entry = it->second; 230412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier entry->reference_count -= reference_count; 231412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier if (entry->reference_count <= 0) { 23264f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes JNIEnv* env = self->GetJniEnv(); 233b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi // Erase the object from the maps. Note object may be null if it's 234b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi // a weak ref and the GC has cleared it. 235b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi int32_t hash_code = entry->identity_hash_code; 236277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe for (auto inner_it = object_to_entry_.lower_bound(hash_code), end = object_to_entry_.end(); 237277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe inner_it != end && inner_it->first == hash_code; ++inner_it) { 238277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe if (entry == inner_it->second) { 239277ccbd200ea43590dfc06a93ae184a765327ad0Andreas Gampe object_to_entry_.erase(inner_it); 240b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi break; 241b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi } 242b5a9e3d1cc1fd66683e43e365afc8c900e2800c4Hiroshi Yamauchi } 243412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier if (entry->jni_reference_type == JNIWeakGlobalRefType) { 244412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier env->DeleteWeakGlobalRef(entry->jni_reference); 24564f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes } else { 246412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier env->DeleteGlobalRef(entry->jni_reference); 24764f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes } 24864f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes id_to_entry_.erase(id); 249412c7fced915fc8d4d5e4166e977d55c809168a6Mathieu Chartier delete entry; 25064f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes } 25164f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} 25264f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes 25364f574f474aa77c72778640ab21f8cfa72546812Elliott Hughes} // namespace art 254