1 /* Copyright (C) 2017 The Android Open Source Project 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * 4 * This file implements interfaces from the file jvmti.h. This implementation 5 * is licensed under the same terms as the file jvmti.h. The 6 * copyright and license information for the file jvmti.h follows. 7 * 8 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. 9 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 10 * 11 * This code is free software; you can redistribute it and/or modify it 12 * under the terms of the GNU General Public License version 2 only, as 13 * published by the Free Software Foundation. Oracle designates this 14 * particular file as subject to the "Classpath" exception as provided 15 * by Oracle in the LICENSE file that accompanied this code. 16 * 17 * This code is distributed in the hope that it will be useful, but WITHOUT 18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 20 * version 2 for more details (a copy is included in the LICENSE file that 21 * accompanied this code). 22 * 23 * You should have received a copy of the GNU General Public License version 24 * 2 along with this work; if not, write to the Free Software Foundation, 25 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 26 * 27 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 28 * or visit www.oracle.com if you need additional information or have any 29 * questions. 30 */ 31 32 #include <functional> 33 34 #include "ti_breakpoint.h" 35 36 #include "art_jvmti.h" 37 #include "art_method-inl.h" 38 #include "base/enums.h" 39 #include "base/mutex-inl.h" 40 #include "deopt_manager.h" 41 #include "dex/dex_file_annotations.h" 42 #include "dex/modifiers.h" 43 #include "events-inl.h" 44 #include "jni_internal.h" 45 #include "mirror/class-inl.h" 46 #include "mirror/object_array-inl.h" 47 #include "nativehelper/scoped_local_ref.h" 48 #include "runtime_callbacks.h" 49 #include "scoped_thread_state_change-inl.h" 50 #include "thread-current-inl.h" 51 #include "thread_list.h" 52 #include "ti_phase.h" 53 54 namespace openjdkjvmti { 55 56 size_t Breakpoint::hash() const { 57 return std::hash<uintptr_t> {}(reinterpret_cast<uintptr_t>(method_)) 58 ^ std::hash<jlocation> {}(location_); 59 } 60 61 Breakpoint::Breakpoint(art::ArtMethod* m, jlocation loc) : method_(m), location_(loc) { 62 DCHECK(!m->IsDefault() || !m->IsCopied() || !m->IsInvokable()) 63 << "Flags are: 0x" << std::hex << m->GetAccessFlags(); 64 } 65 66 void BreakpointUtil::RemoveBreakpointsInClass(ArtJvmTiEnv* env, art::mirror::Class* klass) { 67 std::vector<Breakpoint> to_remove; 68 { 69 art::WriterMutexLock lk(art::Thread::Current(), env->event_info_mutex_); 70 for (const Breakpoint& b : env->breakpoints) { 71 if (b.GetMethod()->GetDeclaringClass() == klass) { 72 to_remove.push_back(b); 73 } 74 } 75 for (const Breakpoint& b : to_remove) { 76 auto it = env->breakpoints.find(b); 77 DCHECK(it != env->breakpoints.end()); 78 env->breakpoints.erase(it); 79 } 80 } 81 DeoptManager* deopt = DeoptManager::Get(); 82 for (const Breakpoint& b : to_remove) { 83 // TODO It might be good to send these all at once instead. 84 deopt->RemoveMethodBreakpoint(b.GetMethod()); 85 } 86 } 87 88 jvmtiError BreakpointUtil::SetBreakpoint(jvmtiEnv* jenv, jmethodID method, jlocation location) { 89 ArtJvmTiEnv* env = ArtJvmTiEnv::AsArtJvmTiEnv(jenv); 90 if (method == nullptr) { 91 return ERR(INVALID_METHODID); 92 } 93 art::ScopedObjectAccess soa(art::Thread::Current()); 94 art::ArtMethod* art_method = art::jni::DecodeArtMethod(method)->GetCanonicalMethod(); 95 if (location < 0 || static_cast<uint32_t>(location) >= 96 art_method->DexInstructions().InsnsSizeInCodeUnits()) { 97 return ERR(INVALID_LOCATION); 98 } 99 DeoptManager::Get()->AddMethodBreakpoint(art_method); 100 { 101 art::WriterMutexLock lk(art::Thread::Current(), env->event_info_mutex_); 102 auto res_pair = env->breakpoints.insert(/* Breakpoint */ {art_method, location}); 103 if (LIKELY(res_pair.second)) { 104 return OK; 105 } 106 } 107 // Didn't get inserted because it's already present! 108 DeoptManager::Get()->RemoveMethodBreakpoint(art_method); 109 return ERR(DUPLICATE); 110 } 111 112 jvmtiError BreakpointUtil::ClearBreakpoint(jvmtiEnv* jenv, jmethodID method, jlocation location) { 113 ArtJvmTiEnv* env = ArtJvmTiEnv::AsArtJvmTiEnv(jenv); 114 if (method == nullptr) { 115 return ERR(INVALID_METHODID); 116 } 117 art::ScopedObjectAccess soa(art::Thread::Current()); 118 art::ArtMethod* art_method = art::jni::DecodeArtMethod(method)->GetCanonicalMethod(); 119 { 120 art::WriterMutexLock lk(art::Thread::Current(), env->event_info_mutex_); 121 auto pos = env->breakpoints.find(/* Breakpoint */ {art_method, location}); 122 if (pos == env->breakpoints.end()) { 123 return ERR(NOT_FOUND); 124 } 125 env->breakpoints.erase(pos); 126 } 127 DeoptManager::Get()->RemoveMethodBreakpoint(art_method); 128 return OK; 129 } 130 131 } // namespace openjdkjvmti 132
