ti_threadgroup.cc revision d18d9e2a94445d4b42e4bc6f0e642e6f76b4706d
1d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe/* Copyright (C) 2017 The Android Open Source Project 2d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * 4d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * This file implements interfaces from the file jvmti.h. This implementation 5d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * is licensed under the same terms as the file jvmti.h. The 6d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * copyright and license information for the file jvmti.h follows. 7d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * 8d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. 9d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 10d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * 11d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * This code is free software; you can redistribute it and/or modify it 12d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * under the terms of the GNU General Public License version 2 only, as 13d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * published by the Free Software Foundation. Oracle designates this 14d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * particular file as subject to the "Classpath" exception as provided 15d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * by Oracle in the LICENSE file that accompanied this code. 16d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * 17d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * This code is distributed in the hope that it will be useful, but WITHOUT 18d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 19d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 20d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * version 2 for more details (a copy is included in the LICENSE file that 21d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * accompanied this code). 22d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * 23d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * You should have received a copy of the GNU General Public License version 24d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * 2 along with this work; if not, write to the Free Software Foundation, 25d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 26d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * 27d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 28d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * or visit www.oracle.com if you need additional information or have any 29d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe * questions. 30d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe */ 31d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 32d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "ti_threadgroup.h" 33d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 34d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "art_field.h" 35d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "art_jvmti.h" 36d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "base/logging.h" 37d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "base/macros.h" 38d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "base/mutex.h" 39d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "handle_scope-inl.h" 40d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "jni_internal.h" 41d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "mirror/class.h" 42d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "mirror/object-inl.h" 43d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "mirror/string.h" 44d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "obj_ptr.h" 45d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "object_lock.h" 46d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "runtime.h" 47d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "scoped_thread_state_change-inl.h" 48d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "thread-inl.h" 49d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "thread_list.h" 50d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe#include "well_known_classes.h" 51d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 52d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampenamespace openjdkjvmti { 53d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 54d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 55d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas GampejvmtiError ThreadGroupUtil::GetTopThreadGroups(jvmtiEnv* env, 56d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jint* group_count_ptr, 57d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jthreadGroup** groups_ptr) { 58d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe // We only have a single top group. So we can take the current thread and move upwards. 59d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (group_count_ptr == nullptr || groups_ptr == nullptr) { 60d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return ERR(NULL_POINTER); 61d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 62d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 63d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::Runtime* runtime = art::Runtime::Current(); 64d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (runtime == nullptr) { 65d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe // Must be starting the runtime, or dying. 66d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return ERR(WRONG_PHASE); 67d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 68d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 69d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jobject sys_thread_group = runtime->GetSystemThreadGroup(); 70d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (sys_thread_group == nullptr) { 71d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe // Seems we're still starting up. 72d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return ERR(WRONG_PHASE); 73d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 74d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 75d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe unsigned char* data; 76d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jvmtiError result = env->Allocate(sizeof(jthreadGroup), &data); 77d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (result != ERR(NONE)) { 78d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return result; 79d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 80d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 81d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jthreadGroup* groups = reinterpret_cast<jthreadGroup*>(data); 82d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe *groups = 83d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe reinterpret_cast<JNIEnv*>(art::Thread::Current()->GetJniEnv())->NewLocalRef(sys_thread_group); 84d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe *groups_ptr = groups; 85d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe *group_count_ptr = 1; 86d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 87d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return ERR(NONE); 88d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe} 89d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 90d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas GampejvmtiError ThreadGroupUtil::GetThreadGroupInfo(jvmtiEnv* env, 91d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jthreadGroup group, 92d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jvmtiThreadGroupInfo* info_ptr) { 93d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (group == nullptr) { 94d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return ERR(INVALID_THREAD_GROUP); 95d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 96d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 97d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ScopedObjectAccess soa(art::Thread::Current()); 98d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (soa.Env()->IsInstanceOf(group, art::WellKnownClasses::java_lang_ThreadGroup) == JNI_FALSE) { 99d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return ERR(INVALID_THREAD_GROUP); 100d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 101d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 102d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ObjPtr<art::mirror::Object> obj = soa.Decode<art::mirror::Object>(group); 103d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 104d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe // Do the name first. It's the only thing that can fail. 105d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe { 106d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ArtField* name_field = 107d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::jni::DecodeArtField(art::WellKnownClasses::java_lang_ThreadGroup_name); 108d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe CHECK(name_field != nullptr); 109d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ObjPtr<art::mirror::String> name_obj = 110d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ObjPtr<art::mirror::String>::DownCast(name_field->GetObject(obj)); 111d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe std::string tmp_str; 112d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe const char* tmp_cstr; 113d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (name_obj == nullptr) { 114d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe tmp_cstr = ""; 115d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } else { 116d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe tmp_str = name_obj->ToModifiedUtf8(); 117d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe tmp_cstr = tmp_str.c_str(); 118d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 119d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jvmtiError result = 120d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe CopyString(env, tmp_cstr, reinterpret_cast<unsigned char**>(&info_ptr->name)); 121d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (result != ERR(NONE)) { 122d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return result; 123d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 124d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 125d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 126d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe // Parent. 127d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe { 128d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ArtField* parent_field = 129d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::jni::DecodeArtField(art::WellKnownClasses::java_lang_ThreadGroup_parent); 130d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe CHECK(parent_field != nullptr); 131d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ObjPtr<art::mirror::Object> parent_group = parent_field->GetObject(obj); 132d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe info_ptr->parent = parent_group == nullptr 133d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe ? nullptr 134d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe : soa.AddLocalReference<jthreadGroup>(parent_group); 135d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 136d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 137d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe // Max priority. 138d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe { 139d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ArtField* prio_field = obj->GetClass()->FindDeclaredInstanceField("maxPriority", "I"); 140d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe CHECK(prio_field != nullptr); 141d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe info_ptr->max_priority = static_cast<jint>(prio_field->GetInt(obj)); 142d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 143d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 144d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe // Daemon. 145d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe { 146d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ArtField* daemon_field = obj->GetClass()->FindDeclaredInstanceField("daemon", "Z"); 147d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe CHECK(daemon_field != nullptr); 148d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe info_ptr->is_daemon = daemon_field->GetBoolean(obj) == 0 ? JNI_FALSE : JNI_TRUE; 149d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 150d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 151d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return ERR(NONE); 152d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe} 153d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 154d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 155d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampestatic bool IsInDesiredThreadGroup(art::Handle<art::mirror::Object> desired_thread_group, 156d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ObjPtr<art::mirror::Object> peer) 157d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe REQUIRES_SHARED(art::Locks::mutator_lock_) { 158d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe CHECK(desired_thread_group.Get() != nullptr); 159d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 160d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ArtField* thread_group_field = 161d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::jni::DecodeArtField(art::WellKnownClasses::java_lang_Thread_group); 162d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe DCHECK(thread_group_field != nullptr); 163d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ObjPtr<art::mirror::Object> group = thread_group_field->GetObject(peer); 164d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return (group == desired_thread_group.Get()); 165d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe} 166d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 167d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampestatic void GetThreads(art::Handle<art::mirror::Object> thread_group, 168d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe std::vector<art::ObjPtr<art::mirror::Object>>* thread_peers) 169d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe REQUIRES_SHARED(art::Locks::mutator_lock_) REQUIRES(!art::Locks::thread_list_lock_) { 170d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe CHECK(thread_group.Get() != nullptr); 171d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 172d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::MutexLock mu(art::Thread::Current(), *art::Locks::thread_list_lock_); 173d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe for (art::Thread* t : art::Runtime::Current()->GetThreadList()->GetList()) { 174d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (t->IsStillStarting()) { 175d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe continue; 176d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 177d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ObjPtr<art::mirror::Object> peer = t->GetPeer(); 178d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (peer == nullptr) { 179d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe continue; 180d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 181d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (IsInDesiredThreadGroup(thread_group, peer)) { 182d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe thread_peers->push_back(peer); 183d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 184d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 185d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe} 186d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 187d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampestatic void GetChildThreadGroups(art::Handle<art::mirror::Object> thread_group, 188d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe std::vector<art::ObjPtr<art::mirror::Object>>* thread_groups) 189d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe REQUIRES_SHARED(art::Locks::mutator_lock_) { 190d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe CHECK(thread_group.Get() != nullptr); 191d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 192d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe // Get the ThreadGroup[] "groups" out of this thread group... 193d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ArtField* groups_field = 194d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::jni::DecodeArtField(art::WellKnownClasses::java_lang_ThreadGroup_groups); 195d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ObjPtr<art::mirror::Object> groups_array = groups_field->GetObject(thread_group.Get()); 196d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 197d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (groups_array == nullptr) { 198d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return; 199d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 200d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe CHECK(groups_array->IsObjectArray()); 201d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 202d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ObjPtr<art::mirror::ObjectArray<art::mirror::Object>> groups_array_as_array = 203d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe groups_array->AsObjectArray<art::mirror::Object>(); 204d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 205d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe // Copy all non-null elements. 206d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe for (int32_t i = 0; i < groups_array_as_array->GetLength(); ++i) { 207d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ObjPtr<art::mirror::Object> entry = groups_array_as_array->Get(i); 208d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (entry != nullptr) { 209d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe thread_groups->push_back(entry); 210d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 211d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 212d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe} 213d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 214d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas GampejvmtiError ThreadGroupUtil::GetThreadGroupChildren(jvmtiEnv* env, 215d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jthreadGroup group, 216d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jint* thread_count_ptr, 217d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jthread** threads_ptr, 218d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jint* group_count_ptr, 219d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jthreadGroup** groups_ptr) { 220d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (group == nullptr) { 221d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return ERR(INVALID_THREAD_GROUP); 222d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 223d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 224d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ScopedObjectAccess soa(art::Thread::Current()); 225d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 226d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (!soa.Env()->IsInstanceOf(group, art::WellKnownClasses::java_lang_ThreadGroup)) { 227d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return ERR(INVALID_THREAD_GROUP); 228d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 229d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 230d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::StackHandleScope<1> hs(soa.Self()); 231d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::Handle<art::mirror::Object> thread_group = hs.NewHandle( 232d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe soa.Decode<art::mirror::Object>(group)); 233d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 234d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe art::ObjectLock<art::mirror::Object> thread_group_lock(soa.Self(), thread_group); 235d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 236d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe std::vector<art::ObjPtr<art::mirror::Object>> thread_peers; 237d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe GetThreads(thread_group, &thread_peers); 238d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 239d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe std::vector<art::ObjPtr<art::mirror::Object>> thread_groups; 240d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe GetChildThreadGroups(thread_group, &thread_groups); 241d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 242d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jthread* thread_data = nullptr; 243d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe JvmtiUniquePtr peers_uptr; 244d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (!thread_peers.empty()) { 245d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe unsigned char* data; 246d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jvmtiError res = env->Allocate(sizeof(jthread) * thread_peers.size(), &data); 247d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (res != ERR(NONE)) { 248d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return res; 249d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 250d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe thread_data = reinterpret_cast<jthread*>(data); 251d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe peers_uptr = MakeJvmtiUniquePtr(env, data); 252d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 253d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 254d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jthreadGroup* group_data = nullptr; 255d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (!thread_groups.empty()) { 256d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe unsigned char* data; 257d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe jvmtiError res = env->Allocate(sizeof(jthreadGroup) * thread_groups.size(), &data); 258d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe if (res != ERR(NONE)) { 259d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return res; 260d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 261d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe group_data = reinterpret_cast<jthreadGroup*>(data); 262d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 263d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 264d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe // Can't fail anymore from here on. 265d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 266d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe // Copy data into out buffers. 267d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe for (size_t i = 0; i != thread_peers.size(); ++i) { 268d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe thread_data[i] = soa.AddLocalReference<jthread>(thread_peers[i]); 269d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 270d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe for (size_t i = 0; i != thread_groups.size(); ++i) { 271d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe group_data[i] = soa.AddLocalReference<jthreadGroup>(thread_groups[i]); 272d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe } 273d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 274d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe *thread_count_ptr = static_cast<jint>(thread_peers.size()); 275d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe *threads_ptr = thread_data; 276d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe *group_count_ptr = static_cast<jint>(thread_groups.size()); 277d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe *groups_ptr = group_data; 278d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 279d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe // Everything's fine. 280d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe peers_uptr.release(); 281d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 282d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe return ERR(NONE); 283d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe} 284d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe 285d18d9e2a94445d4b42e4bc6f0e642e6f76b4706dAndreas Gampe} // namespace openjdkjvmti 286