| /* Copyright (C) 2016 The Android Open Source Project |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This file implements interfaces from the file jvmti.h. This implementation |
| * is licensed under the same terms as the file jvmti.h. The |
| * copyright and license information for the file jvmti.h follows. |
| * |
| * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include "ti_method.h" |
| |
| #include <type_traits> |
| |
| #include "art_jvmti.h" |
| #include "art_method-inl.h" |
| #include "base/enums.h" |
| #include "base/mutex-inl.h" |
| #include "dex_file_annotations.h" |
| #include "dex_file_types.h" |
| #include "events-inl.h" |
| #include "jit/jit.h" |
| #include "jni_internal.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/class_loader.h" |
| #include "mirror/object-inl.h" |
| #include "mirror/object_array-inl.h" |
| #include "modifiers.h" |
| #include "nativehelper/scoped_local_ref.h" |
| #include "oat_file.h" |
| #include "runtime_callbacks.h" |
| #include "scoped_thread_state_change-inl.h" |
| #include "stack.h" |
| #include "thread-current-inl.h" |
| #include "thread_list.h" |
| #include "ti_stack.h" |
| #include "ti_thread.h" |
| #include "ti_phase.h" |
| |
| namespace openjdkjvmti { |
| |
| struct TiMethodCallback : public art::MethodCallback { |
| void RegisterNativeMethod(art::ArtMethod* method, |
| const void* cur_method, |
| /*out*/void** new_method) |
| OVERRIDE REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| if (event_handler->IsEventEnabledAnywhere(ArtJvmtiEvent::kNativeMethodBind)) { |
| art::Thread* thread = art::Thread::Current(); |
| art::JNIEnvExt* jnienv = thread->GetJniEnv(); |
| ScopedLocalRef<jthread> thread_jni( |
| jnienv, PhaseUtil::IsLivePhase() ? jnienv->AddLocalReference<jthread>(thread->GetPeer()) |
| : nullptr); |
| art::ScopedThreadSuspension sts(thread, art::ThreadState::kNative); |
| event_handler->DispatchEvent<ArtJvmtiEvent::kNativeMethodBind>( |
| thread, |
| static_cast<JNIEnv*>(jnienv), |
| thread_jni.get(), |
| art::jni::EncodeArtMethod(method), |
| const_cast<void*>(cur_method), |
| new_method); |
| } |
| } |
| |
| EventHandler* event_handler = nullptr; |
| }; |
| |
| TiMethodCallback gMethodCallback; |
| |
| void MethodUtil::Register(EventHandler* handler) { |
| gMethodCallback.event_handler = handler; |
| art::ScopedThreadStateChange stsc(art::Thread::Current(), |
| art::ThreadState::kWaitingForDebuggerToAttach); |
| art::ScopedSuspendAll ssa("Add method callback"); |
| art::RuntimeCallbacks* callbacks = art::Runtime::Current()->GetRuntimeCallbacks(); |
| callbacks->AddMethodCallback(&gMethodCallback); |
| } |
| |
| void MethodUtil::Unregister() { |
| art::ScopedThreadStateChange stsc(art::Thread::Current(), |
| art::ThreadState::kWaitingForDebuggerToAttach); |
| art::ScopedSuspendAll ssa("Remove method callback"); |
| art::RuntimeCallbacks* callbacks = art::Runtime::Current()->GetRuntimeCallbacks(); |
| callbacks->RemoveMethodCallback(&gMethodCallback); |
| } |
| |
| jvmtiError MethodUtil::GetBytecodes(jvmtiEnv* env, |
| jmethodID method, |
| jint* size_ptr, |
| unsigned char** bytecode_ptr) { |
| if (method == nullptr) { |
| return ERR(INVALID_METHODID); |
| } |
| art::ArtMethod* art_method = art::jni::DecodeArtMethod(method); |
| |
| if (art_method->IsNative()) { |
| return ERR(NATIVE_METHOD); |
| } |
| |
| if (size_ptr == nullptr || bytecode_ptr == nullptr) { |
| return ERR(NULL_POINTER); |
| } |
| |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| const art::DexFile::CodeItem* code_item = art_method->GetCodeItem(); |
| if (code_item == nullptr) { |
| *size_ptr = 0; |
| *bytecode_ptr = nullptr; |
| return OK; |
| } |
| // 2 bytes per instruction for dex code. |
| *size_ptr = code_item->insns_size_in_code_units_ * 2; |
| jvmtiError err = env->Allocate(*size_ptr, bytecode_ptr); |
| if (err != OK) { |
| return err; |
| } |
| memcpy(*bytecode_ptr, code_item->insns_, *size_ptr); |
| return OK; |
| } |
| |
| jvmtiError MethodUtil::GetArgumentsSize(jvmtiEnv* env ATTRIBUTE_UNUSED, |
| jmethodID method, |
| jint* size_ptr) { |
| if (method == nullptr) { |
| return ERR(INVALID_METHODID); |
| } |
| art::ArtMethod* art_method = art::jni::DecodeArtMethod(method); |
| |
| if (art_method->IsNative()) { |
| return ERR(NATIVE_METHOD); |
| } |
| |
| if (size_ptr == nullptr) { |
| return ERR(NULL_POINTER); |
| } |
| |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| if (art_method->IsProxyMethod() || art_method->IsAbstract()) { |
| // Use the shorty. |
| art::ArtMethod* base_method = art_method->GetInterfaceMethodIfProxy(art::kRuntimePointerSize); |
| size_t arg_count = art::ArtMethod::NumArgRegisters(base_method->GetShorty()); |
| if (!base_method->IsStatic()) { |
| arg_count++; |
| } |
| *size_ptr = static_cast<jint>(arg_count); |
| return ERR(NONE); |
| } |
| |
| DCHECK_NE(art_method->GetCodeItemOffset(), 0u); |
| *size_ptr = art_method->GetCodeItem()->ins_size_; |
| |
| return ERR(NONE); |
| } |
| |
| jvmtiError MethodUtil::GetLocalVariableTable(jvmtiEnv* env, |
| jmethodID method, |
| jint* entry_count_ptr, |
| jvmtiLocalVariableEntry** table_ptr) { |
| if (method == nullptr) { |
| return ERR(INVALID_METHODID); |
| } |
| art::ArtMethod* art_method = art::jni::DecodeArtMethod(method); |
| |
| if (art_method->IsNative()) { |
| return ERR(NATIVE_METHOD); |
| } |
| |
| if (entry_count_ptr == nullptr || table_ptr == nullptr) { |
| return ERR(NULL_POINTER); |
| } |
| |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| const art::DexFile* dex_file = art_method->GetDexFile(); |
| const art::DexFile::CodeItem* code_item = art_method->GetCodeItem(); |
| // TODO code_item == nullptr means that the method is abstract (or native, but we check that |
| // earlier). We should check what is returned by the RI in this situation since it's not clear |
| // what the appropriate return value is from the spec. |
| if (dex_file == nullptr || code_item == nullptr) { |
| return ERR(ABSENT_INFORMATION); |
| } |
| |
| struct LocalVariableContext { |
| explicit LocalVariableContext(jvmtiEnv* jenv) : env_(jenv), variables_(), err_(OK) {} |
| |
| static void Callback(void* raw_ctx, const art::DexFile::LocalInfo& entry) { |
| reinterpret_cast<LocalVariableContext*>(raw_ctx)->Insert(entry); |
| } |
| |
| void Insert(const art::DexFile::LocalInfo& entry) { |
| if (err_ != OK) { |
| return; |
| } |
| JvmtiUniquePtr<char[]> name_str = CopyString(env_, entry.name_, &err_); |
| if (err_ != OK) { |
| return; |
| } |
| JvmtiUniquePtr<char[]> sig_str = CopyString(env_, entry.descriptor_, &err_); |
| if (err_ != OK) { |
| return; |
| } |
| JvmtiUniquePtr<char[]> generic_sig_str = CopyString(env_, entry.signature_, &err_); |
| if (err_ != OK) { |
| return; |
| } |
| variables_.push_back({ |
| .start_location = static_cast<jlocation>(entry.start_address_), |
| .length = static_cast<jint>(entry.end_address_ - entry.start_address_), |
| .name = name_str.release(), |
| .signature = sig_str.release(), |
| .generic_signature = generic_sig_str.release(), |
| .slot = entry.reg_, |
| }); |
| } |
| |
| jvmtiError Release(jint* out_entry_count_ptr, jvmtiLocalVariableEntry** out_table_ptr) { |
| jlong table_size = sizeof(jvmtiLocalVariableEntry) * variables_.size(); |
| if (err_ != OK || |
| (err_ = env_->Allocate(table_size, |
| reinterpret_cast<unsigned char**>(out_table_ptr))) != OK) { |
| Cleanup(); |
| return err_; |
| } else { |
| *out_entry_count_ptr = variables_.size(); |
| memcpy(*out_table_ptr, variables_.data(), table_size); |
| return OK; |
| } |
| } |
| |
| void Cleanup() { |
| for (jvmtiLocalVariableEntry& e : variables_) { |
| env_->Deallocate(reinterpret_cast<unsigned char*>(e.name)); |
| env_->Deallocate(reinterpret_cast<unsigned char*>(e.signature)); |
| env_->Deallocate(reinterpret_cast<unsigned char*>(e.generic_signature)); |
| } |
| } |
| |
| jvmtiEnv* env_; |
| std::vector<jvmtiLocalVariableEntry> variables_; |
| jvmtiError err_; |
| }; |
| |
| LocalVariableContext context(env); |
| uint32_t debug_info_offset = art::OatFile::GetDebugInfoOffset(*dex_file, code_item); |
| if (!dex_file->DecodeDebugLocalInfo(code_item, |
| debug_info_offset, |
| art_method->IsStatic(), |
| art_method->GetDexMethodIndex(), |
| LocalVariableContext::Callback, |
| &context)) { |
| // Something went wrong with decoding the debug information. It might as well not be there. |
| return ERR(ABSENT_INFORMATION); |
| } else { |
| return context.Release(entry_count_ptr, table_ptr); |
| } |
| } |
| |
| jvmtiError MethodUtil::GetMaxLocals(jvmtiEnv* env ATTRIBUTE_UNUSED, |
| jmethodID method, |
| jint* max_ptr) { |
| if (method == nullptr) { |
| return ERR(INVALID_METHODID); |
| } |
| art::ArtMethod* art_method = art::jni::DecodeArtMethod(method); |
| |
| if (art_method->IsNative()) { |
| return ERR(NATIVE_METHOD); |
| } |
| |
| if (max_ptr == nullptr) { |
| return ERR(NULL_POINTER); |
| } |
| |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| if (art_method->IsProxyMethod() || art_method->IsAbstract()) { |
| // This isn't specified as an error case, so return 0. |
| *max_ptr = 0; |
| return ERR(NONE); |
| } |
| |
| DCHECK_NE(art_method->GetCodeItemOffset(), 0u); |
| *max_ptr = art_method->GetCodeItem()->registers_size_; |
| |
| return ERR(NONE); |
| } |
| |
| jvmtiError MethodUtil::GetMethodName(jvmtiEnv* env, |
| jmethodID method, |
| char** name_ptr, |
| char** signature_ptr, |
| char** generic_ptr) { |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| art::ArtMethod* art_method = art::jni::DecodeArtMethod(method); |
| art_method = art_method->GetInterfaceMethodIfProxy(art::kRuntimePointerSize); |
| |
| JvmtiUniquePtr<char[]> name_copy; |
| if (name_ptr != nullptr) { |
| const char* method_name = art_method->GetName(); |
| if (method_name == nullptr) { |
| method_name = "<error>"; |
| } |
| jvmtiError ret; |
| name_copy = CopyString(env, method_name, &ret); |
| if (name_copy == nullptr) { |
| return ret; |
| } |
| *name_ptr = name_copy.get(); |
| } |
| |
| JvmtiUniquePtr<char[]> signature_copy; |
| if (signature_ptr != nullptr) { |
| const art::Signature sig = art_method->GetSignature(); |
| std::string str = sig.ToString(); |
| jvmtiError ret; |
| signature_copy = CopyString(env, str.c_str(), &ret); |
| if (signature_copy == nullptr) { |
| return ret; |
| } |
| *signature_ptr = signature_copy.get(); |
| } |
| |
| if (generic_ptr != nullptr) { |
| *generic_ptr = nullptr; |
| if (!art_method->GetDeclaringClass()->IsProxyClass()) { |
| art::mirror::ObjectArray<art::mirror::String>* str_array = |
| art::annotations::GetSignatureAnnotationForMethod(art_method); |
| if (str_array != nullptr) { |
| std::ostringstream oss; |
| for (int32_t i = 0; i != str_array->GetLength(); ++i) { |
| oss << str_array->Get(i)->ToModifiedUtf8(); |
| } |
| std::string output_string = oss.str(); |
| jvmtiError ret; |
| JvmtiUniquePtr<char[]> generic_copy = CopyString(env, output_string.c_str(), &ret); |
| if (generic_copy == nullptr) { |
| return ret; |
| } |
| *generic_ptr = generic_copy.release(); |
| } else if (soa.Self()->IsExceptionPending()) { |
| // TODO: Should we report an error here? |
| soa.Self()->ClearException(); |
| } |
| } |
| } |
| |
| // Everything is fine, release the buffers. |
| name_copy.release(); |
| signature_copy.release(); |
| |
| return ERR(NONE); |
| } |
| |
| jvmtiError MethodUtil::GetMethodDeclaringClass(jvmtiEnv* env ATTRIBUTE_UNUSED, |
| jmethodID method, |
| jclass* declaring_class_ptr) { |
| if (declaring_class_ptr == nullptr) { |
| return ERR(NULL_POINTER); |
| } |
| |
| art::ArtMethod* art_method = art::jni::DecodeArtMethod(method); |
| // Note: No GetInterfaceMethodIfProxy, we want to actual class. |
| |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| art::mirror::Class* klass = art_method->GetDeclaringClass(); |
| *declaring_class_ptr = soa.AddLocalReference<jclass>(klass); |
| |
| return ERR(NONE); |
| } |
| |
| jvmtiError MethodUtil::GetMethodLocation(jvmtiEnv* env ATTRIBUTE_UNUSED, |
| jmethodID method, |
| jlocation* start_location_ptr, |
| jlocation* end_location_ptr) { |
| if (method == nullptr) { |
| return ERR(INVALID_METHODID); |
| } |
| art::ArtMethod* art_method = art::jni::DecodeArtMethod(method); |
| |
| if (art_method->IsNative()) { |
| return ERR(NATIVE_METHOD); |
| } |
| |
| if (start_location_ptr == nullptr || end_location_ptr == nullptr) { |
| return ERR(NULL_POINTER); |
| } |
| |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| if (art_method->IsProxyMethod() || art_method->IsAbstract()) { |
| // This isn't specified as an error case, so return -1/-1 as the RI does. |
| *start_location_ptr = -1; |
| *end_location_ptr = -1; |
| return ERR(NONE); |
| } |
| |
| DCHECK_NE(art_method->GetCodeItemOffset(), 0u); |
| *start_location_ptr = 0; |
| *end_location_ptr = art_method->GetCodeItem()->insns_size_in_code_units_ - 1; |
| |
| return ERR(NONE); |
| } |
| |
| jvmtiError MethodUtil::GetMethodModifiers(jvmtiEnv* env ATTRIBUTE_UNUSED, |
| jmethodID method, |
| jint* modifiers_ptr) { |
| if (modifiers_ptr == nullptr) { |
| return ERR(NULL_POINTER); |
| } |
| |
| art::ArtMethod* art_method = art::jni::DecodeArtMethod(method); |
| uint32_t modifiers = art_method->GetAccessFlags(); |
| |
| // Note: Keep this code in sync with Executable.fixMethodFlags. |
| if ((modifiers & art::kAccAbstract) != 0) { |
| modifiers &= ~art::kAccNative; |
| } |
| modifiers &= ~art::kAccSynchronized; |
| if ((modifiers & art::kAccDeclaredSynchronized) != 0) { |
| modifiers |= art::kAccSynchronized; |
| } |
| modifiers &= art::kAccJavaFlagsMask; |
| |
| *modifiers_ptr = modifiers; |
| return ERR(NONE); |
| } |
| |
| using LineNumberContext = std::vector<jvmtiLineNumberEntry>; |
| |
| static bool CollectLineNumbers(void* void_context, const art::DexFile::PositionInfo& entry) { |
| LineNumberContext* context = reinterpret_cast<LineNumberContext*>(void_context); |
| jvmtiLineNumberEntry jvmti_entry = { static_cast<jlocation>(entry.address_), |
| static_cast<jint>(entry.line_) }; |
| context->push_back(jvmti_entry); |
| return false; // Collect all, no early exit. |
| } |
| |
| jvmtiError MethodUtil::GetLineNumberTable(jvmtiEnv* env, |
| jmethodID method, |
| jint* entry_count_ptr, |
| jvmtiLineNumberEntry** table_ptr) { |
| if (method == nullptr) { |
| return ERR(NULL_POINTER); |
| } |
| art::ArtMethod* art_method = art::jni::DecodeArtMethod(method); |
| DCHECK(!art_method->IsRuntimeMethod()); |
| |
| const art::DexFile::CodeItem* code_item; |
| const art::DexFile* dex_file; |
| { |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| |
| if (art_method->IsProxyMethod()) { |
| return ERR(ABSENT_INFORMATION); |
| } |
| if (art_method->IsNative()) { |
| return ERR(NATIVE_METHOD); |
| } |
| if (entry_count_ptr == nullptr || table_ptr == nullptr) { |
| return ERR(NULL_POINTER); |
| } |
| |
| code_item = art_method->GetCodeItem(); |
| dex_file = art_method->GetDexFile(); |
| DCHECK(code_item != nullptr) << art_method->PrettyMethod() << " " << dex_file->GetLocation(); |
| } |
| |
| LineNumberContext context; |
| uint32_t debug_info_offset = art::OatFile::GetDebugInfoOffset(*dex_file, code_item); |
| bool success = dex_file->DecodeDebugPositionInfo( |
| code_item, debug_info_offset, CollectLineNumbers, &context); |
| if (!success) { |
| return ERR(ABSENT_INFORMATION); |
| } |
| |
| unsigned char* data; |
| jlong mem_size = context.size() * sizeof(jvmtiLineNumberEntry); |
| jvmtiError alloc_error = env->Allocate(mem_size, &data); |
| if (alloc_error != ERR(NONE)) { |
| return alloc_error; |
| } |
| *table_ptr = reinterpret_cast<jvmtiLineNumberEntry*>(data); |
| memcpy(*table_ptr, context.data(), mem_size); |
| *entry_count_ptr = static_cast<jint>(context.size()); |
| |
| return ERR(NONE); |
| } |
| |
| template <typename T> |
| static jvmtiError IsMethodT(jvmtiEnv* env ATTRIBUTE_UNUSED, |
| jmethodID method, |
| T test, |
| jboolean* is_t_ptr) { |
| if (method == nullptr) { |
| return ERR(INVALID_METHODID); |
| } |
| if (is_t_ptr == nullptr) { |
| return ERR(NULL_POINTER); |
| } |
| |
| art::ArtMethod* art_method = art::jni::DecodeArtMethod(method); |
| *is_t_ptr = test(art_method) ? JNI_TRUE : JNI_FALSE; |
| |
| return ERR(NONE); |
| } |
| |
| jvmtiError MethodUtil::IsMethodNative(jvmtiEnv* env, jmethodID m, jboolean* is_native_ptr) { |
| auto test = [](art::ArtMethod* method) { |
| return method->IsNative(); |
| }; |
| return IsMethodT(env, m, test, is_native_ptr); |
| } |
| |
| jvmtiError MethodUtil::IsMethodObsolete(jvmtiEnv* env, jmethodID m, jboolean* is_obsolete_ptr) { |
| auto test = [](art::ArtMethod* method) { |
| return method->IsObsolete(); |
| }; |
| return IsMethodT(env, m, test, is_obsolete_ptr); |
| } |
| |
| jvmtiError MethodUtil::IsMethodSynthetic(jvmtiEnv* env, jmethodID m, jboolean* is_synthetic_ptr) { |
| auto test = [](art::ArtMethod* method) { |
| return method->IsSynthetic(); |
| }; |
| return IsMethodT(env, m, test, is_synthetic_ptr); |
| } |
| |
| class CommonLocalVariableClosure : public art::Closure { |
| public: |
| CommonLocalVariableClosure(art::Thread* caller, |
| jint depth, |
| jint slot) |
| : result_(ERR(INTERNAL)), caller_(caller), depth_(depth), slot_(slot) {} |
| |
| void Run(art::Thread* self) OVERRIDE REQUIRES(art::Locks::mutator_lock_) { |
| 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; |
| } |
| art::ArtMethod* method = visitor.GetMethod(); |
| // Native and 'art' proxy methods don't have registers. |
| if (method->IsNative() || method->IsProxyMethod()) { |
| // TODO It might be useful to fake up support for get at least on proxy frames. |
| result_ = ERR(OPAQUE_FRAME); |
| return; |
| } else if (method->GetCodeItem()->registers_size_ <= slot_) { |
| result_ = ERR(INVALID_SLOT); |
| return; |
| } |
| bool 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) { |
| art::Runtime::Current()->GetInstrumentation()->InstrumentThreadStack(self); |
| } |
| } |
| |
| jvmtiError GetResult() const { |
| return result_; |
| } |
| |
| protected: |
| virtual jvmtiError Execute(art::ArtMethod* method, art::StackVisitor& visitor) |
| REQUIRES(art::Locks::mutator_lock_) = 0; |
| virtual jvmtiError GetTypeError(art::ArtMethod* method, |
| art::Primitive::Type type, |
| const std::string& descriptor) |
| REQUIRES(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(); |
| const art::DexFile::CodeItem* code_item = method->GetCodeItem(); |
| if (dex_file == nullptr || code_item == nullptr) { |
| return ERR(OPAQUE_FRAME); |
| } |
| |
| struct GetLocalVariableInfoContext { |
| explicit GetLocalVariableInfoContext(jint slot, |
| uint32_t pc, |
| std::string* out_descriptor, |
| art::Primitive::Type* out_type) |
| : found_(false), jslot_(slot), pc_(pc), descriptor_(out_descriptor), type_(out_type) { |
| *descriptor_ = ""; |
| *type_ = art::Primitive::kPrimVoid; |
| } |
| |
| static void Callback(void* raw_ctx, const art::DexFile::LocalInfo& entry) { |
| reinterpret_cast<GetLocalVariableInfoContext*>(raw_ctx)->Handle(entry); |
| } |
| |
| void Handle(const art::DexFile::LocalInfo& entry) { |
| if (found_) { |
| return; |
| } else if (entry.start_address_ <= pc_ && |
| entry.end_address_ > pc_ && |
| entry.reg_ == jslot_) { |
| found_ = true; |
| *type_ = art::Primitive::GetType(entry.descriptor_[0]); |
| *descriptor_ = entry.descriptor_; |
| } |
| return; |
| } |
| |
| bool found_; |
| jint jslot_; |
| uint32_t pc_; |
| std::string* descriptor_; |
| art::Primitive::Type* type_; |
| }; |
| |
| GetLocalVariableInfoContext context(slot_, dex_pc, descriptor, type); |
| uint32_t debug_info_offset = art::OatFile::GetDebugInfoOffset(*dex_file, code_item); |
| if (!dex_file->DecodeDebugLocalInfo(code_item, |
| debug_info_offset, |
| method->IsStatic(), |
| method->GetDexMethodIndex(), |
| GetLocalVariableInfoContext::Callback, |
| &context) || !context.found_) { |
| // Something went wrong with decoding the debug information. It might as well not be there. |
| return ERR(INVALID_SLOT); |
| } else { |
| return OK; |
| } |
| } |
| |
| jvmtiError result_; |
| art::Thread* caller_; |
| jint depth_; |
| jint slot_; |
| }; |
| |
| class GetLocalVariableClosure : public CommonLocalVariableClosure { |
| public: |
| GetLocalVariableClosure(art::Thread* caller, |
| jint depth, |
| jint slot, |
| art::Primitive::Type type, |
| jvalue* val) |
| : CommonLocalVariableClosure(caller, depth, slot), type_(type), val_(val) {} |
| |
| protected: |
| jvmtiError GetTypeError(art::ArtMethod* method ATTRIBUTE_UNUSED, |
| art::Primitive::Type slot_type, |
| const std::string& descriptor ATTRIBUTE_UNUSED) |
| OVERRIDE REQUIRES(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(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::ObjPtr<art::mirror::Object> obj(reinterpret_cast<art::mirror::Object*>(ptr_val)); |
| val_->l = obj.IsNull() ? nullptr : caller_->GetJniEnv()->AddLocalReference<jobject>(obj); |
| 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_; |
| }; |
| |
| 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(); |
| // Suspend JIT since it can get confused if we deoptimize methods getting jitted. |
| art::jit::ScopedJitSuspend suspend_jit; |
| 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(self, depth, slot, type, val); |
| // RequestSynchronousCheckpoint releases the thread_list_lock_ as a part of its execution. |
| if (!ThreadUtil::RequestGCSafeSynchronousCheckpoint(target, &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(caller, depth, slot), type_(type), val_(val) {} |
| |
| protected: |
| jvmtiError GetTypeError(art::ArtMethod* method, |
| art::Primitive::Type slot_type, |
| const std::string& descriptor) |
| OVERRIDE REQUIRES(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(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::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); |
| } |
| art::Thread* self = art::Thread::Current(); |
| // Suspend JIT since it can get confused if we deoptimize methods getting jitted. |
| art::jit::ScopedJitSuspend suspend_jit; |
| 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 (!ThreadUtil::RequestGCSafeSynchronousCheckpoint(target, &c)) { |
| return ERR(THREAD_NOT_ALIVE); |
| } else { |
| return c.GetResult(); |
| } |
| } |
| |
| class GetLocalInstanceClosure : public art::Closure { |
| public: |
| GetLocalInstanceClosure(art::Thread* caller, jint depth, jobject* val) |
| : result_(ERR(INTERNAL)), |
| caller_(caller), |
| depth_(depth), |
| val_(val) {} |
| |
| void Run(art::Thread* self) OVERRIDE REQUIRES(art::Locks::mutator_lock_) { |
| 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; |
| art::ObjPtr<art::mirror::Object> obj = visitor.GetThisObject(); |
| *val_ = obj.IsNull() ? nullptr : caller_->GetJniEnv()->AddLocalReference<jobject>(obj); |
| } |
| |
| jvmtiError GetResult() const { |
| return result_; |
| } |
| |
| private: |
| jvmtiError result_; |
| art::Thread* caller_; |
| jint depth_; |
| jobject* 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; |
| } |
| GetLocalInstanceClosure c(self, depth, data); |
| // RequestSynchronousCheckpoint releases the thread_list_lock_ as a part of its execution. |
| if (!ThreadUtil::RequestGCSafeSynchronousCheckpoint(target, &c)) { |
| return ERR(THREAD_NOT_ALIVE); |
| } else { |
| return c.GetResult(); |
| } |
| } |
| |
| #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 |