/* Copyright (C) 2016 The Android Open Source Project
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This file implements interfaces from the file jvmti.h. This implementation
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* is licensed under the same terms as the file jvmti.h. The
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* copyright and license information for the file jvmti.h follows.
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*
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* Copyright (c) 2003, 2011, 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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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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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#include "ti_method.h"
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#include <type_traits>
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#include "arch/context.h"
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#include "art_jvmti.h"
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#include "art_method-inl.h"
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#include "base/enums.h"
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#include "base/mutex-inl.h"
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#include "deopt_manager.h"
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#include "dex/code_item_accessors-inl.h"
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#include "dex/dex_file_annotations.h"
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#include "dex/dex_file_types.h"
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#include "dex/modifiers.h"
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#include "events-inl.h"
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#include "gc_root-inl.h"
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#include "jit/jit.h"
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#include "jni/jni_internal.h"
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#include "mirror/class-inl.h"
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#include "mirror/class_loader.h"
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#include "mirror/object-inl.h"
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#include "mirror/object_array-inl.h"
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#include "nativehelper/scoped_local_ref.h"
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#include "oat_file.h"
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#include "obj_ptr.h"
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#include "runtime_callbacks.h"
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#include "scoped_thread_state_change-inl.h"
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#include "stack.h"
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#include "thread-current-inl.h"
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#include "thread.h"
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#include "thread_list.h"
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#include "ti_stack.h"
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#include "ti_thread.h"
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#include "ti_phase.h"
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namespace openjdkjvmti {
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struct TiMethodCallback : public art::MethodCallback {
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void RegisterNativeMethod(art::ArtMethod* method,
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const void* cur_method,
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/*out*/void** new_method)
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override REQUIRES_SHARED(art::Locks::mutator_lock_) {
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if (event_handler->IsEventEnabledAnywhere(ArtJvmtiEvent::kNativeMethodBind)) {
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art::Thread* thread = art::Thread::Current();
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art::JNIEnvExt* jnienv = thread->GetJniEnv();
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ScopedLocalRef<jthread> thread_jni(
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jnienv, PhaseUtil::IsLivePhase() ? jnienv->AddLocalReference<jthread>(thread->GetPeer())
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: nullptr);
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art::ScopedThreadSuspension sts(thread, art::ThreadState::kNative);
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event_handler->DispatchEvent<ArtJvmtiEvent::kNativeMethodBind>(
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thread,
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static_cast<JNIEnv*>(jnienv),
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thread_jni.get(),
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art::jni::EncodeArtMethod(method),
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const_cast<void*>(cur_method),
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new_method);
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}
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}
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EventHandler* event_handler = nullptr;
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};
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TiMethodCallback gMethodCallback;
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void MethodUtil::Register(EventHandler* handler) {
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gMethodCallback.event_handler = handler;
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art::ScopedThreadStateChange stsc(art::Thread::Current(),
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art::ThreadState::kWaitingForDebuggerToAttach);
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art::ScopedSuspendAll ssa("Add method callback");
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art::RuntimeCallbacks* callbacks = art::Runtime::Current()->GetRuntimeCallbacks();
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callbacks->AddMethodCallback(&gMethodCallback);
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}
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void MethodUtil::Unregister() {
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art::ScopedThreadStateChange stsc(art::Thread::Current(),
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art::ThreadState::kWaitingForDebuggerToAttach);
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art::ScopedSuspendAll ssa("Remove method callback");
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art::RuntimeCallbacks* callbacks = art::Runtime::Current()->GetRuntimeCallbacks();
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callbacks->RemoveMethodCallback(&gMethodCallback);
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}
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jvmtiError MethodUtil::GetBytecodes(jvmtiEnv* env,
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jmethodID method,
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jint* size_ptr,
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unsigned char** bytecode_ptr) {
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if (method == nullptr) {
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return ERR(INVALID_METHODID);
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}
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art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
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if (art_method->IsNative()) {
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return ERR(NATIVE_METHOD);
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}
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if (size_ptr == nullptr || bytecode_ptr == nullptr) {
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return ERR(NULL_POINTER);
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}
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art::ScopedObjectAccess soa(art::Thread::Current());
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art::CodeItemInstructionAccessor accessor(art_method->DexInstructions());
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if (!accessor.HasCodeItem()) {
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*size_ptr = 0;
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*bytecode_ptr = nullptr;
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return OK;
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}
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// 2 bytes per instruction for dex code.
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*size_ptr = accessor.InsnsSizeInCodeUnits() * 2;
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jvmtiError err = env->Allocate(*size_ptr, bytecode_ptr);
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if (err != OK) {
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return err;
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}
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memcpy(*bytecode_ptr, accessor.Insns(), *size_ptr);
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return OK;
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}
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jvmtiError MethodUtil::GetArgumentsSize(jvmtiEnv* env ATTRIBUTE_UNUSED,
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jmethodID method,
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jint* size_ptr) {
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if (method == nullptr) {
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return ERR(INVALID_METHODID);
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}
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art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
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if (art_method->IsNative()) {
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return ERR(NATIVE_METHOD);
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}
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if (size_ptr == nullptr) {
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return ERR(NULL_POINTER);
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}
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art::ScopedObjectAccess soa(art::Thread::Current());
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if (art_method->IsProxyMethod() || art_method->IsAbstract()) {
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// Use the shorty.
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art::ArtMethod* base_method = art_method->GetInterfaceMethodIfProxy(art::kRuntimePointerSize);
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size_t arg_count = art::ArtMethod::NumArgRegisters(base_method->GetShorty());
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if (!base_method->IsStatic()) {
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arg_count++;
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}
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*size_ptr = static_cast<jint>(arg_count);
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return ERR(NONE);
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}
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DCHECK_NE(art_method->GetCodeItemOffset(), 0u);
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*size_ptr = art_method->DexInstructionData().InsSize();
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return ERR(NONE);
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}
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jvmtiError MethodUtil::GetLocalVariableTable(jvmtiEnv* env,
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jmethodID method,
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jint* entry_count_ptr,
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jvmtiLocalVariableEntry** table_ptr) {
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if (method == nullptr) {
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return ERR(INVALID_METHODID);
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}
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art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
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if (art_method->IsNative()) {
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return ERR(NATIVE_METHOD);
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}
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if (entry_count_ptr == nullptr || table_ptr == nullptr) {
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return ERR(NULL_POINTER);
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}
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art::ScopedObjectAccess soa(art::Thread::Current());
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const art::DexFile* const dex_file = art_method->GetDexFile();
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if (dex_file == nullptr) {
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return ERR(ABSENT_INFORMATION);
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}
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// TODO HasCodeItem == false means that the method is abstract (or native, but we check that
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// earlier). We should check what is returned by the RI in this situation since it's not clear
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// what the appropriate return value is from the spec.
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art::CodeItemDebugInfoAccessor accessor(art_method->DexInstructionDebugInfo());
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if (!accessor.HasCodeItem()) {
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return ERR(ABSENT_INFORMATION);
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}
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std::vector<jvmtiLocalVariableEntry> variables;
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jvmtiError err = OK;
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auto release = [&](jint* out_entry_count_ptr, jvmtiLocalVariableEntry** out_table_ptr) {
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jlong table_size = sizeof(jvmtiLocalVariableEntry) * variables.size();
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if (err != OK ||
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(err = env->Allocate(table_size,
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reinterpret_cast<unsigned char**>(out_table_ptr))) != OK) {
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for (jvmtiLocalVariableEntry& e : variables) {
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env->Deallocate(reinterpret_cast<unsigned char*>(e.name));
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env->Deallocate(reinterpret_cast<unsigned char*>(e.signature));
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env->Deallocate(reinterpret_cast<unsigned char*>(e.generic_signature));
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}
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return err;
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}
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*out_entry_count_ptr = variables.size();
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memcpy(*out_table_ptr, variables.data(), table_size);
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return OK;
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};
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auto visitor = [&](const art::DexFile::LocalInfo& entry) {
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if (err != OK) {
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return;
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}
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JvmtiUniquePtr<char[]> name_str = CopyString(env, entry.name_, &err);
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if (err != OK) {
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return;
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}
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JvmtiUniquePtr<char[]> sig_str = CopyString(env, entry.descriptor_, &err);
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if (err != OK) {
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return;
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}
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JvmtiUniquePtr<char[]> generic_sig_str = CopyString(env, entry.signature_, &err);
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if (err != OK) {
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return;
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}
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variables.push_back({
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.start_location = static_cast<jlocation>(entry.start_address_),
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.length = static_cast<jint>(entry.end_address_ - entry.start_address_),
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.name = name_str.release(),
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.signature = sig_str.release(),
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.generic_signature = generic_sig_str.release(),
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.slot = entry.reg_,
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});
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};
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if (!accessor.DecodeDebugLocalInfo(art_method->IsStatic(),
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art_method->GetDexMethodIndex(),
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visitor)) {
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// Something went wrong with decoding the debug information. It might as well not be there.
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return ERR(ABSENT_INFORMATION);
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}
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return release(entry_count_ptr, table_ptr);
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}
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jvmtiError MethodUtil::GetMaxLocals(jvmtiEnv* env ATTRIBUTE_UNUSED,
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jmethodID method,
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jint* max_ptr) {
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if (method == nullptr) {
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return ERR(INVALID_METHODID);
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}
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art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
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if (art_method->IsNative()) {
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return ERR(NATIVE_METHOD);
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}
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if (max_ptr == nullptr) {
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return ERR(NULL_POINTER);
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}
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art::ScopedObjectAccess soa(art::Thread::Current());
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if (art_method->IsProxyMethod() || art_method->IsAbstract()) {
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// This isn't specified as an error case, so return 0.
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*max_ptr = 0;
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return ERR(NONE);
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}
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DCHECK_NE(art_method->GetCodeItemOffset(), 0u);
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*max_ptr = art_method->DexInstructionData().RegistersSize();
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return ERR(NONE);
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}
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jvmtiError MethodUtil::GetMethodName(jvmtiEnv* env,
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jmethodID method,
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char** name_ptr,
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char** signature_ptr,
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char** generic_ptr) {
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art::ScopedObjectAccess soa(art::Thread::Current());
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art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
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art_method = art_method->GetInterfaceMethodIfProxy(art::kRuntimePointerSize);
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JvmtiUniquePtr<char[]> name_copy;
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if (name_ptr != nullptr) {
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const char* method_name = art_method->GetName();
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if (method_name == nullptr) {
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method_name = "<error>";
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}
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jvmtiError ret;
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name_copy = CopyString(env, method_name, &ret);
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if (name_copy == nullptr) {
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return ret;
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}
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*name_ptr = name_copy.get();
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}
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JvmtiUniquePtr<char[]> signature_copy;
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if (signature_ptr != nullptr) {
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const art::Signature sig = art_method->GetSignature();
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std::string str = sig.ToString();
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jvmtiError ret;
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signature_copy = CopyString(env, str.c_str(), &ret);
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if (signature_copy == nullptr) {
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return ret;
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}
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*signature_ptr = signature_copy.get();
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}
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if (generic_ptr != nullptr) {
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*generic_ptr = nullptr;
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if (!art_method->GetDeclaringClass()->IsProxyClass()) {
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art::ObjPtr<art::mirror::ObjectArray<art::mirror::String>> str_array =
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art::annotations::GetSignatureAnnotationForMethod(art_method);
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if (str_array != nullptr) {
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std::ostringstream oss;
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for (int32_t i = 0; i != str_array->GetLength(); ++i) {
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oss << str_array->Get(i)->ToModifiedUtf8();
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}
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std::string output_string = oss.str();
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jvmtiError ret;
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JvmtiUniquePtr<char[]> generic_copy = CopyString(env, output_string.c_str(), &ret);
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if (generic_copy == nullptr) {
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return ret;
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}
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*generic_ptr = generic_copy.release();
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} else if (soa.Self()->IsExceptionPending()) {
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// TODO: Should we report an error here?
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soa.Self()->ClearException();
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}
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}
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}
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// Everything is fine, release the buffers.
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name_copy.release();
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signature_copy.release();
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return ERR(NONE);
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}
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jvmtiError MethodUtil::GetMethodDeclaringClass(jvmtiEnv* env ATTRIBUTE_UNUSED,
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jmethodID method,
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jclass* declaring_class_ptr) {
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if (declaring_class_ptr == nullptr) {
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return ERR(NULL_POINTER);
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}
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art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
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// Note: No GetInterfaceMethodIfProxy, we want to actual class.
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art::ScopedObjectAccess soa(art::Thread::Current());
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art::ObjPtr<art::mirror::Class> klass = art_method->GetDeclaringClass();
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*declaring_class_ptr = soa.AddLocalReference<jclass>(klass);
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return ERR(NONE);
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}
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jvmtiError MethodUtil::GetMethodLocation(jvmtiEnv* env ATTRIBUTE_UNUSED,
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jmethodID method,
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jlocation* start_location_ptr,
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jlocation* end_location_ptr) {
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if (method == nullptr) {
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return ERR(INVALID_METHODID);
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}
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art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
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if (art_method->IsNative()) {
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return ERR(NATIVE_METHOD);
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}
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if (start_location_ptr == nullptr || end_location_ptr == nullptr) {
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return ERR(NULL_POINTER);
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}
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art::ScopedObjectAccess soa(art::Thread::Current());
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if (art_method->IsProxyMethod() || art_method->IsAbstract()) {
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// This isn't specified as an error case, so return -1/-1 as the RI does.
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*start_location_ptr = -1;
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*end_location_ptr = -1;
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return ERR(NONE);
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}
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DCHECK_NE(art_method->GetCodeItemOffset(), 0u);
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*start_location_ptr = 0;
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*end_location_ptr = art_method->DexInstructions().InsnsSizeInCodeUnits() - 1;
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return ERR(NONE);
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}
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jvmtiError MethodUtil::GetMethodModifiers(jvmtiEnv* env ATTRIBUTE_UNUSED,
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jmethodID method,
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jint* modifiers_ptr) {
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if (modifiers_ptr == nullptr) {
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return ERR(NULL_POINTER);
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}
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art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
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uint32_t modifiers = art_method->GetAccessFlags();
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// Note: Keep this code in sync with Executable.fixMethodFlags.
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if ((modifiers & art::kAccAbstract) != 0) {
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modifiers &= ~art::kAccNative;
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}
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modifiers &= ~art::kAccSynchronized;
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if ((modifiers & art::kAccDeclaredSynchronized) != 0) {
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modifiers |= art::kAccSynchronized;
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}
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modifiers &= art::kAccJavaFlagsMask;
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*modifiers_ptr = modifiers;
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return ERR(NONE);
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}
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jvmtiError MethodUtil::GetLineNumberTable(jvmtiEnv* env,
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jmethodID method,
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jint* entry_count_ptr,
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jvmtiLineNumberEntry** table_ptr) {
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if (method == nullptr) {
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return ERR(NULL_POINTER);
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}
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art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
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DCHECK(!art_method->IsRuntimeMethod());
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art::CodeItemDebugInfoAccessor accessor;
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const art::DexFile* dex_file;
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{
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art::ScopedObjectAccess soa(art::Thread::Current());
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if (art_method->IsProxyMethod()) {
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return ERR(ABSENT_INFORMATION);
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}
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if (art_method->IsNative()) {
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return ERR(NATIVE_METHOD);
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}
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if (entry_count_ptr == nullptr || table_ptr == nullptr) {
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return ERR(NULL_POINTER);
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}
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accessor = art::CodeItemDebugInfoAccessor(art_method->DexInstructionDebugInfo());
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dex_file = art_method->GetDexFile();
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DCHECK(accessor.HasCodeItem()) << art_method->PrettyMethod() << " " << dex_file->GetLocation();
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}
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std::vector<jvmtiLineNumberEntry> context;
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bool success = accessor.DecodeDebugPositionInfo([&](const art::DexFile::PositionInfo& entry) {
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context.push_back({static_cast<jlocation>(entry.address_), static_cast<jint>(entry.line_)});
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return false;
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});
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if (!success) {
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return ERR(ABSENT_INFORMATION);
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}
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unsigned char* data;
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jlong mem_size = context.size() * sizeof(jvmtiLineNumberEntry);
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jvmtiError alloc_error = env->Allocate(mem_size, &data);
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if (alloc_error != ERR(NONE)) {
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return alloc_error;
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}
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*table_ptr = reinterpret_cast<jvmtiLineNumberEntry*>(data);
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memcpy(*table_ptr, context.data(), mem_size);
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*entry_count_ptr = static_cast<jint>(context.size());
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return ERR(NONE);
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}
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template <typename T>
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static jvmtiError IsMethodT(jvmtiEnv* env ATTRIBUTE_UNUSED,
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jmethodID method,
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T test,
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jboolean* is_t_ptr) {
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if (method == nullptr) {
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return ERR(INVALID_METHODID);
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}
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if (is_t_ptr == nullptr) {
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return ERR(NULL_POINTER);
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}
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art::ArtMethod* art_method = art::jni::DecodeArtMethod(method);
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*is_t_ptr = test(art_method) ? JNI_TRUE : JNI_FALSE;
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return ERR(NONE);
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}
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jvmtiError MethodUtil::IsMethodNative(jvmtiEnv* env, jmethodID m, jboolean* is_native_ptr) {
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auto test = [](art::ArtMethod* method) {
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return method->IsNative();
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};
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return IsMethodT(env, m, test, is_native_ptr);
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}
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jvmtiError MethodUtil::IsMethodObsolete(jvmtiEnv* env, jmethodID m, jboolean* is_obsolete_ptr) {
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auto test = [](art::ArtMethod* method) {
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return method->IsObsolete();
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};
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return IsMethodT(env, m, test, is_obsolete_ptr);
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}
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jvmtiError MethodUtil::IsMethodSynthetic(jvmtiEnv* env, jmethodID m, jboolean* is_synthetic_ptr) {
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auto test = [](art::ArtMethod* method) {
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return method->IsSynthetic();
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};
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return IsMethodT(env, m, test, is_synthetic_ptr);
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}
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class CommonLocalVariableClosure : public art::Closure {
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public:
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CommonLocalVariableClosure(jint depth, jint slot)
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: result_(ERR(INTERNAL)), depth_(depth), slot_(slot) {}
|
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void Run(art::Thread* self) override REQUIRES(art::Locks::mutator_lock_) {
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art::Locks::mutator_lock_->AssertSharedHeld(art::Thread::Current());
|
bool needs_instrument;
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{
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art::ScopedAssertNoThreadSuspension sants("CommonLocalVariableClosure::Run");
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std::unique_ptr<art::Context> context(art::Context::Create());
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FindFrameAtDepthVisitor visitor(self, context.get(), depth_);
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visitor.WalkStack();
|
if (!visitor.FoundFrame()) {
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// Must have been a bad depth.
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result_ = ERR(NO_MORE_FRAMES);
|
return;
|
}
|
art::ArtMethod* method = visitor.GetMethod();
|
// Native and 'art' proxy methods don't have registers.
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if (method->IsNative() || method->IsProxyMethod()) {
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// TODO It might be useful to fake up support for get at least on proxy frames.
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result_ = ERR(OPAQUE_FRAME);
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return;
|
} else if (method->DexInstructionData().RegistersSize() <= slot_) {
|
result_ = ERR(INVALID_SLOT);
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return;
|
}
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needs_instrument = !visitor.IsShadowFrame();
|
uint32_t pc = visitor.GetDexPc(/*abort_on_failure=*/false);
|
if (pc == art::dex::kDexNoIndex) {
|
// Cannot figure out current PC.
|
result_ = ERR(OPAQUE_FRAME);
|
return;
|
}
|
std::string descriptor;
|
art::Primitive::Type slot_type = art::Primitive::kPrimVoid;
|
jvmtiError err = GetSlotType(method, pc, &descriptor, &slot_type);
|
if (err != OK) {
|
result_ = err;
|
return;
|
}
|
|
err = GetTypeError(method, slot_type, descriptor);
|
if (err != OK) {
|
result_ = err;
|
return;
|
}
|
result_ = Execute(method, visitor);
|
}
|
if (needs_instrument) {
|
DeoptManager::Get()->DeoptimizeThread(self);
|
}
|
}
|
|
virtual jvmtiError GetResult() {
|
return result_;
|
}
|
|
protected:
|
virtual jvmtiError Execute(art::ArtMethod* method, art::StackVisitor& visitor)
|
REQUIRES_SHARED(art::Locks::mutator_lock_) = 0;
|
virtual jvmtiError GetTypeError(art::ArtMethod* method,
|
art::Primitive::Type type,
|
const std::string& descriptor)
|
REQUIRES_SHARED(art::Locks::mutator_lock_) = 0;
|
|
jvmtiError GetSlotType(art::ArtMethod* method,
|
uint32_t dex_pc,
|
/*out*/std::string* descriptor,
|
/*out*/art::Primitive::Type* type)
|
REQUIRES(art::Locks::mutator_lock_) {
|
const art::DexFile* dex_file = method->GetDexFile();
|
if (dex_file == nullptr) {
|
return ERR(OPAQUE_FRAME);
|
}
|
art::CodeItemDebugInfoAccessor accessor(method->DexInstructionDebugInfo());
|
if (!accessor.HasCodeItem()) {
|
return ERR(OPAQUE_FRAME);
|
}
|
bool found = false;
|
*type = art::Primitive::kPrimVoid;
|
descriptor->clear();
|
auto visitor = [&](const art::DexFile::LocalInfo& entry) {
|
if (!found &&
|
entry.start_address_ <= dex_pc &&
|
entry.end_address_ > dex_pc &&
|
entry.reg_ == slot_) {
|
found = true;
|
*type = art::Primitive::GetType(entry.descriptor_[0]);
|
*descriptor = entry.descriptor_;
|
}
|
};
|
if (!accessor.DecodeDebugLocalInfo(method->IsStatic(), method->GetDexMethodIndex(), visitor) ||
|
!found) {
|
// Something went wrong with decoding the debug information. It might as well not be there.
|
return ERR(INVALID_SLOT);
|
}
|
return OK;
|
}
|
|
jvmtiError result_;
|
jint depth_;
|
jint slot_;
|
};
|
|
class GetLocalVariableClosure : public CommonLocalVariableClosure {
|
public:
|
GetLocalVariableClosure(jint depth,
|
jint slot,
|
art::Primitive::Type type,
|
jvalue* val)
|
: CommonLocalVariableClosure(depth, slot),
|
type_(type),
|
val_(val),
|
obj_val_(nullptr) {}
|
|
jvmtiError GetResult() override REQUIRES_SHARED(art::Locks::mutator_lock_) {
|
if (result_ == OK && type_ == art::Primitive::kPrimNot) {
|
if (obj_val_ == nullptr) {
|
val_->l = nullptr;
|
} else {
|
art::JNIEnvExt* jni = art::Thread::Current()->GetJniEnv();
|
val_->l = static_cast<JNIEnv*>(jni)->NewLocalRef(obj_val_);
|
jni->DeleteGlobalRef(obj_val_);
|
obj_val_ = nullptr;
|
}
|
}
|
return CommonLocalVariableClosure::GetResult();
|
}
|
|
protected:
|
jvmtiError GetTypeError(art::ArtMethod* method ATTRIBUTE_UNUSED,
|
art::Primitive::Type slot_type,
|
const std::string& descriptor ATTRIBUTE_UNUSED)
|
override REQUIRES_SHARED(art::Locks::mutator_lock_) {
|
switch (slot_type) {
|
case art::Primitive::kPrimByte:
|
case art::Primitive::kPrimChar:
|
case art::Primitive::kPrimInt:
|
case art::Primitive::kPrimShort:
|
case art::Primitive::kPrimBoolean:
|
return type_ == art::Primitive::kPrimInt ? OK : ERR(TYPE_MISMATCH);
|
case art::Primitive::kPrimLong:
|
case art::Primitive::kPrimFloat:
|
case art::Primitive::kPrimDouble:
|
case art::Primitive::kPrimNot:
|
return type_ == slot_type ? OK : ERR(TYPE_MISMATCH);
|
case art::Primitive::kPrimVoid:
|
LOG(FATAL) << "Unexpected primitive type " << slot_type;
|
UNREACHABLE();
|
}
|
}
|
|
jvmtiError Execute(art::ArtMethod* method, art::StackVisitor& visitor)
|
override REQUIRES_SHARED(art::Locks::mutator_lock_) {
|
switch (type_) {
|
case art::Primitive::kPrimNot: {
|
uint32_t ptr_val;
|
if (!visitor.GetVReg(method,
|
static_cast<uint16_t>(slot_),
|
art::kReferenceVReg,
|
&ptr_val)) {
|
return ERR(OPAQUE_FRAME);
|
}
|
art::JNIEnvExt* jni = art::Thread::Current()->GetJniEnv();
|
art::ObjPtr<art::mirror::Object> obj(reinterpret_cast<art::mirror::Object*>(ptr_val));
|
ScopedLocalRef<jobject> local(
|
jni, obj.IsNull() ? nullptr : jni->AddLocalReference<jobject>(obj));
|
obj_val_ = jni->NewGlobalRef(local.get());
|
break;
|
}
|
case art::Primitive::kPrimInt:
|
case art::Primitive::kPrimFloat: {
|
if (!visitor.GetVReg(method,
|
static_cast<uint16_t>(slot_),
|
type_ == art::Primitive::kPrimFloat ? art::kFloatVReg : art::kIntVReg,
|
reinterpret_cast<uint32_t*>(&val_->i))) {
|
return ERR(OPAQUE_FRAME);
|
}
|
break;
|
}
|
case art::Primitive::kPrimDouble:
|
case art::Primitive::kPrimLong: {
|
auto lo_type = type_ == art::Primitive::kPrimLong ? art::kLongLoVReg : art::kDoubleLoVReg;
|
auto high_type = type_ == art::Primitive::kPrimLong ? art::kLongHiVReg : art::kDoubleHiVReg;
|
if (!visitor.GetVRegPair(method,
|
static_cast<uint16_t>(slot_),
|
lo_type,
|
high_type,
|
reinterpret_cast<uint64_t*>(&val_->j))) {
|
return ERR(OPAQUE_FRAME);
|
}
|
break;
|
}
|
default: {
|
LOG(FATAL) << "unexpected register type " << type_;
|
UNREACHABLE();
|
}
|
}
|
return OK;
|
}
|
|
private:
|
art::Primitive::Type type_;
|
jvalue* val_;
|
// A global reference to the return value. We use the global reference to safely transfer the
|
// value between threads.
|
jobject obj_val_;
|
};
|
|
jvmtiError MethodUtil::GetLocalVariableGeneric(jvmtiEnv* env ATTRIBUTE_UNUSED,
|
jthread thread,
|
jint depth,
|
jint slot,
|
art::Primitive::Type type,
|
jvalue* val) {
|
if (depth < 0) {
|
return ERR(ILLEGAL_ARGUMENT);
|
}
|
art::Thread* self = art::Thread::Current();
|
art::ScopedObjectAccess soa(self);
|
art::Locks::thread_list_lock_->ExclusiveLock(self);
|
art::Thread* target = nullptr;
|
jvmtiError err = ERR(INTERNAL);
|
if (!ThreadUtil::GetAliveNativeThread(thread, soa, &target, &err)) {
|
art::Locks::thread_list_lock_->ExclusiveUnlock(self);
|
return err;
|
}
|
GetLocalVariableClosure c(depth, slot, type, val);
|
// RequestSynchronousCheckpoint releases the thread_list_lock_ as a part of its execution.
|
if (!target->RequestSynchronousCheckpoint(&c)) {
|
return ERR(THREAD_NOT_ALIVE);
|
} else {
|
return c.GetResult();
|
}
|
}
|
|
class SetLocalVariableClosure : public CommonLocalVariableClosure {
|
public:
|
SetLocalVariableClosure(art::Thread* caller,
|
jint depth,
|
jint slot,
|
art::Primitive::Type type,
|
jvalue val)
|
: CommonLocalVariableClosure(depth, slot), caller_(caller), type_(type), val_(val) {}
|
|
protected:
|
jvmtiError GetTypeError(art::ArtMethod* method,
|
art::Primitive::Type slot_type,
|
const std::string& descriptor)
|
override REQUIRES_SHARED(art::Locks::mutator_lock_) {
|
switch (slot_type) {
|
case art::Primitive::kPrimNot: {
|
if (type_ != art::Primitive::kPrimNot) {
|
return ERR(TYPE_MISMATCH);
|
} else if (val_.l == nullptr) {
|
return OK;
|
} else {
|
art::ClassLinker* cl = art::Runtime::Current()->GetClassLinker();
|
art::ObjPtr<art::mirror::Class> set_class =
|
caller_->DecodeJObject(val_.l)->GetClass();
|
art::ObjPtr<art::mirror::ClassLoader> loader =
|
method->GetDeclaringClass()->GetClassLoader();
|
art::ObjPtr<art::mirror::Class> slot_class =
|
cl->LookupClass(caller_, descriptor.c_str(), loader);
|
DCHECK(!slot_class.IsNull());
|
return slot_class->IsAssignableFrom(set_class) ? OK : ERR(TYPE_MISMATCH);
|
}
|
}
|
case art::Primitive::kPrimByte:
|
case art::Primitive::kPrimChar:
|
case art::Primitive::kPrimInt:
|
case art::Primitive::kPrimShort:
|
case art::Primitive::kPrimBoolean:
|
return type_ == art::Primitive::kPrimInt ? OK : ERR(TYPE_MISMATCH);
|
case art::Primitive::kPrimLong:
|
case art::Primitive::kPrimFloat:
|
case art::Primitive::kPrimDouble:
|
return type_ == slot_type ? OK : ERR(TYPE_MISMATCH);
|
case art::Primitive::kPrimVoid:
|
LOG(FATAL) << "Unexpected primitive type " << slot_type;
|
UNREACHABLE();
|
}
|
}
|
|
jvmtiError Execute(art::ArtMethod* method, art::StackVisitor& visitor)
|
override REQUIRES_SHARED(art::Locks::mutator_lock_) {
|
switch (type_) {
|
case art::Primitive::kPrimNot: {
|
uint32_t ptr_val;
|
art::ObjPtr<art::mirror::Object> obj(caller_->DecodeJObject(val_.l));
|
ptr_val = static_cast<uint32_t>(reinterpret_cast<uintptr_t>(obj.Ptr()));
|
if (!visitor.SetVReg(method,
|
static_cast<uint16_t>(slot_),
|
ptr_val,
|
art::kReferenceVReg)) {
|
return ERR(OPAQUE_FRAME);
|
}
|
break;
|
}
|
case art::Primitive::kPrimInt:
|
case art::Primitive::kPrimFloat: {
|
if (!visitor.SetVReg(method,
|
static_cast<uint16_t>(slot_),
|
static_cast<uint32_t>(val_.i),
|
type_ == art::Primitive::kPrimFloat ? art::kFloatVReg
|
: art::kIntVReg)) {
|
return ERR(OPAQUE_FRAME);
|
}
|
break;
|
}
|
case art::Primitive::kPrimDouble:
|
case art::Primitive::kPrimLong: {
|
auto lo_type = type_ == art::Primitive::kPrimLong ? art::kLongLoVReg : art::kDoubleLoVReg;
|
auto high_type = type_ == art::Primitive::kPrimLong ? art::kLongHiVReg : art::kDoubleHiVReg;
|
if (!visitor.SetVRegPair(method,
|
static_cast<uint16_t>(slot_),
|
static_cast<uint64_t>(val_.j),
|
lo_type,
|
high_type)) {
|
return ERR(OPAQUE_FRAME);
|
}
|
break;
|
}
|
default: {
|
LOG(FATAL) << "unexpected register type " << type_;
|
UNREACHABLE();
|
}
|
}
|
return OK;
|
}
|
|
private:
|
art::Thread* caller_;
|
art::Primitive::Type type_;
|
jvalue val_;
|
};
|
|
jvmtiError MethodUtil::SetLocalVariableGeneric(jvmtiEnv* env ATTRIBUTE_UNUSED,
|
jthread thread,
|
jint depth,
|
jint slot,
|
art::Primitive::Type type,
|
jvalue val) {
|
if (depth < 0) {
|
return ERR(ILLEGAL_ARGUMENT);
|
}
|
// Make sure that we know not to do any OSR anymore.
|
// TODO We should really keep track of this at the Frame granularity.
|
DeoptManager::Get()->SetLocalsUpdated();
|
art::Thread* self = art::Thread::Current();
|
art::ScopedObjectAccess soa(self);
|
art::Locks::thread_list_lock_->ExclusiveLock(self);
|
art::Thread* target = nullptr;
|
jvmtiError err = ERR(INTERNAL);
|
if (!ThreadUtil::GetAliveNativeThread(thread, soa, &target, &err)) {
|
art::Locks::thread_list_lock_->ExclusiveUnlock(self);
|
return err;
|
}
|
SetLocalVariableClosure c(self, depth, slot, type, val);
|
// RequestSynchronousCheckpoint releases the thread_list_lock_ as a part of its execution.
|
if (!target->RequestSynchronousCheckpoint(&c)) {
|
return ERR(THREAD_NOT_ALIVE);
|
} else {
|
return c.GetResult();
|
}
|
}
|
|
class GetLocalInstanceClosure : public art::Closure {
|
public:
|
explicit GetLocalInstanceClosure(jint depth)
|
: result_(ERR(INTERNAL)),
|
depth_(depth),
|
val_(nullptr) {}
|
|
void Run(art::Thread* self) override REQUIRES(art::Locks::mutator_lock_) {
|
art::ScopedAssertNoThreadSuspension sants("GetLocalInstanceClosure::Run");
|
art::Locks::mutator_lock_->AssertSharedHeld(art::Thread::Current());
|
std::unique_ptr<art::Context> context(art::Context::Create());
|
FindFrameAtDepthVisitor visitor(self, context.get(), depth_);
|
visitor.WalkStack();
|
if (!visitor.FoundFrame()) {
|
// Must have been a bad depth.
|
result_ = ERR(NO_MORE_FRAMES);
|
return;
|
}
|
result_ = OK;
|
val_ = art::GcRoot<art::mirror::Object>(visitor.GetThisObject());
|
}
|
|
jvmtiError GetResult(jobject* data_out) REQUIRES_SHARED(art::Locks::mutator_lock_) {
|
if (result_ == OK) {
|
*data_out = val_.IsNull()
|
? nullptr
|
: art::Thread::Current()->GetJniEnv()->AddLocalReference<jobject>(val_.Read());
|
}
|
return result_;
|
}
|
|
private:
|
jvmtiError result_;
|
jint depth_;
|
art::GcRoot<art::mirror::Object> val_;
|
};
|
|
jvmtiError MethodUtil::GetLocalInstance(jvmtiEnv* env ATTRIBUTE_UNUSED,
|
jthread thread,
|
jint depth,
|
jobject* data) {
|
if (depth < 0) {
|
return ERR(ILLEGAL_ARGUMENT);
|
}
|
art::Thread* self = art::Thread::Current();
|
art::ScopedObjectAccess soa(self);
|
art::Locks::thread_list_lock_->ExclusiveLock(self);
|
art::Thread* target = nullptr;
|
jvmtiError err = ERR(INTERNAL);
|
if (!ThreadUtil::GetAliveNativeThread(thread, soa, &target, &err)) {
|
art::Locks::thread_list_lock_->ExclusiveUnlock(self);
|
return err;
|
}
|
art::ScopedAssertNoThreadSuspension sants("Performing GetLocalInstance");
|
GetLocalInstanceClosure c(depth);
|
// RequestSynchronousCheckpoint releases the thread_list_lock_ as a part of its execution. We
|
// need to avoid suspending as we wait for the checkpoint to occur since we are (potentially)
|
// transfering a GcRoot across threads.
|
if (!target->RequestSynchronousCheckpoint(&c, art::ThreadState::kRunnable)) {
|
return ERR(THREAD_NOT_ALIVE);
|
} else {
|
return c.GetResult(data);
|
}
|
}
|
|
#define FOR_JVMTI_JVALUE_TYPES(fn) \
|
fn(jint, art::Primitive::kPrimInt, i) \
|
fn(jlong, art::Primitive::kPrimLong, j) \
|
fn(jfloat, art::Primitive::kPrimFloat, f) \
|
fn(jdouble, art::Primitive::kPrimDouble, d) \
|
fn(jobject, art::Primitive::kPrimNot, l)
|
|
namespace impl {
|
|
template<typename T> void WriteJvalue(T, jvalue*);
|
template<typename T> void ReadJvalue(jvalue, T*);
|
template<typename T> art::Primitive::Type GetJNIType();
|
|
#define JNI_TYPE_CHAR(type, prim, id) \
|
template<> art::Primitive::Type GetJNIType<type>() { \
|
return prim; \
|
}
|
|
FOR_JVMTI_JVALUE_TYPES(JNI_TYPE_CHAR);
|
|
#undef JNI_TYPE_CHAR
|
|
#define RW_JVALUE(srctype, prim, id) \
|
template<> void ReadJvalue<srctype>(jvalue in, std::add_pointer<srctype>::type out) { \
|
*out = in.id; \
|
} \
|
template<> void WriteJvalue<srctype>(srctype in, jvalue* out) { \
|
out->id = in; \
|
}
|
|
FOR_JVMTI_JVALUE_TYPES(RW_JVALUE);
|
|
#undef RW_JVALUE
|
|
} // namespace impl
|
|
template<typename T>
|
jvmtiError MethodUtil::SetLocalVariable(jvmtiEnv* env,
|
jthread thread,
|
jint depth,
|
jint slot,
|
T data) {
|
jvalue v = {.j = 0};
|
art::Primitive::Type type = impl::GetJNIType<T>();
|
impl::WriteJvalue(data, &v);
|
return SetLocalVariableGeneric(env, thread, depth, slot, type, v);
|
}
|
|
template<typename T>
|
jvmtiError MethodUtil::GetLocalVariable(jvmtiEnv* env,
|
jthread thread,
|
jint depth,
|
jint slot,
|
T* data) {
|
if (data == nullptr) {
|
return ERR(NULL_POINTER);
|
}
|
jvalue v = {.j = 0};
|
art::Primitive::Type type = impl::GetJNIType<T>();
|
jvmtiError err = GetLocalVariableGeneric(env, thread, depth, slot, type, &v);
|
if (err != OK) {
|
return err;
|
} else {
|
impl::ReadJvalue(v, data);
|
return OK;
|
}
|
}
|
|
#define GET_SET_LV(srctype, prim, id) \
|
template jvmtiError MethodUtil::GetLocalVariable<srctype>(jvmtiEnv*, \
|
jthread, \
|
jint, \
|
jint, \
|
std::add_pointer<srctype>::type); \
|
template jvmtiError MethodUtil::SetLocalVariable<srctype>(jvmtiEnv*, \
|
jthread, \
|
jint, \
|
jint, \
|
srctype);
|
|
FOR_JVMTI_JVALUE_TYPES(GET_SET_LV);
|
|
#undef GET_SET_LV
|
|
#undef FOR_JVMTI_JVALUE_TYPES
|
|
} // namespace openjdkjvmti
|
