1431 lines
54 KiB
C++
1431 lines
54 KiB
C++
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "class.h"
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#include "android-base/stringprintf.h"
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#include "art_field-inl.h"
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#include "art_method-inl.h"
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#include "class_ext.h"
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#include "class_linker-inl.h"
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#include "class_loader.h"
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#include "class-inl.h"
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#include "dex_cache.h"
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#include "dex_file-inl.h"
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#include "dex_file_annotations.h"
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#include "gc/accounting/card_table-inl.h"
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#include "handle_scope-inl.h"
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#include "method.h"
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#include "object_array-inl.h"
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#include "object-inl.h"
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#include "object-refvisitor-inl.h"
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#include "object_lock.h"
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#include "runtime.h"
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#include "thread.h"
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#include "throwable.h"
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#include "utils.h"
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#include "well_known_classes.h"
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namespace art {
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namespace mirror {
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using android::base::StringPrintf;
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GcRoot<Class> Class::java_lang_Class_;
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void Class::SetClassClass(ObjPtr<Class> java_lang_Class) {
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CHECK(java_lang_Class_.IsNull())
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<< java_lang_Class_.Read()
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<< " " << java_lang_Class;
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CHECK(java_lang_Class != nullptr);
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java_lang_Class->SetClassFlags(kClassFlagClass);
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java_lang_Class_ = GcRoot<Class>(java_lang_Class);
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}
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void Class::ResetClass() {
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CHECK(!java_lang_Class_.IsNull());
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java_lang_Class_ = GcRoot<Class>(nullptr);
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}
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void Class::VisitRoots(RootVisitor* visitor) {
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java_lang_Class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
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}
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ClassExt* Class::EnsureExtDataPresent(Thread* self) {
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ObjPtr<ClassExt> existing(GetExtData());
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if (!existing.IsNull()) {
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return existing.Ptr();
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}
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StackHandleScope<3> hs(self);
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// Handlerize 'this' since we are allocating here.
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Handle<Class> h_this(hs.NewHandle(this));
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// Clear exception so we can allocate.
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Handle<Throwable> throwable(hs.NewHandle(self->GetException()));
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self->ClearException();
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// Allocate the ClassExt
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Handle<ClassExt> new_ext(hs.NewHandle(ClassExt::Alloc(self)));
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if (new_ext == nullptr) {
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// OOM allocating the classExt.
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// TODO Should we restore the suppressed exception?
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self->AssertPendingOOMException();
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return nullptr;
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} else {
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MemberOffset ext_offset(OFFSET_OF_OBJECT_MEMBER(Class, ext_data_));
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bool set;
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// Set the ext_data_ field using CAS semantics.
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if (Runtime::Current()->IsActiveTransaction()) {
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set = h_this->CasFieldStrongSequentiallyConsistentObject<true>(ext_offset,
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ObjPtr<ClassExt>(nullptr),
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new_ext.Get());
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} else {
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set = h_this->CasFieldStrongSequentiallyConsistentObject<false>(ext_offset,
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ObjPtr<ClassExt>(nullptr),
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new_ext.Get());
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}
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ObjPtr<ClassExt> ret(set ? new_ext.Get() : h_this->GetExtData());
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DCHECK(!set || h_this->GetExtData() == new_ext.Get());
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CHECK(!ret.IsNull());
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// Restore the exception if there was one.
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if (throwable != nullptr) {
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self->SetException(throwable.Get());
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}
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return ret.Ptr();
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}
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}
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void Class::SetStatus(Handle<Class> h_this, Status new_status, Thread* self) {
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Status old_status = h_this->GetStatus();
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ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
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bool class_linker_initialized = class_linker != nullptr && class_linker->IsInitialized();
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if (LIKELY(class_linker_initialized)) {
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if (UNLIKELY(new_status <= old_status &&
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new_status != kStatusErrorUnresolved &&
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new_status != kStatusErrorResolved &&
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new_status != kStatusRetired)) {
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LOG(FATAL) << "Unexpected change back of class status for " << h_this->PrettyClass()
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<< " " << old_status << " -> " << new_status;
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}
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if (new_status >= kStatusResolved || old_status >= kStatusResolved) {
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// When classes are being resolved the resolution code should hold the lock.
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CHECK_EQ(h_this->GetLockOwnerThreadId(), self->GetThreadId())
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<< "Attempt to change status of class while not holding its lock: "
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<< h_this->PrettyClass() << " " << old_status << " -> " << new_status;
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}
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}
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if (UNLIKELY(IsErroneous(new_status))) {
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CHECK(!h_this->IsErroneous())
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<< "Attempt to set as erroneous an already erroneous class "
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<< h_this->PrettyClass()
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<< " old_status: " << old_status << " new_status: " << new_status;
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CHECK_EQ(new_status == kStatusErrorResolved, old_status >= kStatusResolved);
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if (VLOG_IS_ON(class_linker)) {
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LOG(ERROR) << "Setting " << h_this->PrettyDescriptor() << " to erroneous.";
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if (self->IsExceptionPending()) {
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LOG(ERROR) << "Exception: " << self->GetException()->Dump();
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}
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}
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ObjPtr<ClassExt> ext(h_this->EnsureExtDataPresent(self));
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if (!ext.IsNull()) {
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self->AssertPendingException();
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ext->SetVerifyError(self->GetException());
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} else {
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self->AssertPendingOOMException();
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}
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self->AssertPendingException();
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}
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static_assert(sizeof(Status) == sizeof(uint32_t), "Size of status not equal to uint32");
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if (Runtime::Current()->IsActiveTransaction()) {
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h_this->SetField32Volatile<true>(StatusOffset(), new_status);
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} else {
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h_this->SetField32Volatile<false>(StatusOffset(), new_status);
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}
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// Setting the object size alloc fast path needs to be after the status write so that if the
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// alloc path sees a valid object size, we would know that it's initialized as long as it has a
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// load-acquire/fake dependency.
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if (new_status == kStatusInitialized && !h_this->IsVariableSize()) {
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DCHECK_EQ(h_this->GetObjectSizeAllocFastPath(), std::numeric_limits<uint32_t>::max());
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// Finalizable objects must always go slow path.
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if (!h_this->IsFinalizable()) {
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h_this->SetObjectSizeAllocFastPath(RoundUp(h_this->GetObjectSize(), kObjectAlignment));
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}
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}
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if (!class_linker_initialized) {
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// When the class linker is being initialized its single threaded and by definition there can be
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// no waiters. During initialization classes may appear temporary but won't be retired as their
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// size was statically computed.
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} else {
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// Classes that are being resolved or initialized need to notify waiters that the class status
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// changed. See ClassLinker::EnsureResolved and ClassLinker::WaitForInitializeClass.
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if (h_this->IsTemp()) {
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// Class is a temporary one, ensure that waiters for resolution get notified of retirement
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// so that they can grab the new version of the class from the class linker's table.
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CHECK_LT(new_status, kStatusResolved) << h_this->PrettyDescriptor();
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if (new_status == kStatusRetired || new_status == kStatusErrorUnresolved) {
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h_this->NotifyAll(self);
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}
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} else {
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CHECK_NE(new_status, kStatusRetired);
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if (old_status >= kStatusResolved || new_status >= kStatusResolved) {
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h_this->NotifyAll(self);
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}
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}
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}
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}
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void Class::SetDexCache(ObjPtr<DexCache> new_dex_cache) {
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SetFieldObjectTransaction(OFFSET_OF_OBJECT_MEMBER(Class, dex_cache_), new_dex_cache);
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}
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void Class::SetClassSize(uint32_t new_class_size) {
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if (kIsDebugBuild && new_class_size < GetClassSize()) {
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DumpClass(LOG_STREAM(FATAL_WITHOUT_ABORT), kDumpClassFullDetail);
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LOG(FATAL_WITHOUT_ABORT) << new_class_size << " vs " << GetClassSize();
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LOG(FATAL) << "class=" << PrettyTypeOf();
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}
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SetField32Transaction(OFFSET_OF_OBJECT_MEMBER(Class, class_size_), new_class_size);
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}
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// Return the class' name. The exact format is bizarre, but it's the specified behavior for
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// Class.getName: keywords for primitive types, regular "[I" form for primitive arrays (so "int"
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// but "[I"), and arrays of reference types written between "L" and ";" but with dots rather than
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// slashes (so "java.lang.String" but "[Ljava.lang.String;"). Madness.
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String* Class::ComputeName(Handle<Class> h_this) {
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String* name = h_this->GetName();
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if (name != nullptr) {
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return name;
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}
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std::string temp;
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const char* descriptor = h_this->GetDescriptor(&temp);
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Thread* self = Thread::Current();
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if ((descriptor[0] != 'L') && (descriptor[0] != '[')) {
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// The descriptor indicates that this is the class for
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// a primitive type; special-case the return value.
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const char* c_name = nullptr;
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switch (descriptor[0]) {
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case 'Z': c_name = "boolean"; break;
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case 'B': c_name = "byte"; break;
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case 'C': c_name = "char"; break;
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case 'S': c_name = "short"; break;
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case 'I': c_name = "int"; break;
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case 'J': c_name = "long"; break;
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case 'F': c_name = "float"; break;
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case 'D': c_name = "double"; break;
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case 'V': c_name = "void"; break;
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default:
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LOG(FATAL) << "Unknown primitive type: " << PrintableChar(descriptor[0]);
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}
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name = String::AllocFromModifiedUtf8(self, c_name);
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} else {
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// Convert the UTF-8 name to a java.lang.String. The name must use '.' to separate package
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// components.
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name = String::AllocFromModifiedUtf8(self, DescriptorToDot(descriptor).c_str());
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}
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h_this->SetName(name);
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return name;
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}
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void Class::DumpClass(std::ostream& os, int flags) {
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if ((flags & kDumpClassFullDetail) == 0) {
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os << PrettyClass();
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if ((flags & kDumpClassClassLoader) != 0) {
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os << ' ' << GetClassLoader();
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}
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if ((flags & kDumpClassInitialized) != 0) {
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os << ' ' << GetStatus();
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}
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os << "\n";
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return;
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}
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Thread* const self = Thread::Current();
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StackHandleScope<2> hs(self);
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Handle<Class> h_this(hs.NewHandle(this));
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Handle<Class> h_super(hs.NewHandle(GetSuperClass()));
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auto image_pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize();
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std::string temp;
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os << "----- " << (IsInterface() ? "interface" : "class") << " "
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<< "'" << GetDescriptor(&temp) << "' cl=" << GetClassLoader() << " -----\n",
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os << " objectSize=" << SizeOf() << " "
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<< "(" << (h_super != nullptr ? h_super->SizeOf() : -1) << " from super)\n",
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os << StringPrintf(" access=0x%04x.%04x\n",
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GetAccessFlags() >> 16, GetAccessFlags() & kAccJavaFlagsMask);
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if (h_super != nullptr) {
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os << " super='" << h_super->PrettyClass() << "' (cl=" << h_super->GetClassLoader()
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<< ")\n";
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}
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if (IsArrayClass()) {
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os << " componentType=" << PrettyClass(GetComponentType()) << "\n";
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}
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const size_t num_direct_interfaces = NumDirectInterfaces();
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if (num_direct_interfaces > 0) {
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os << " interfaces (" << num_direct_interfaces << "):\n";
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for (size_t i = 0; i < num_direct_interfaces; ++i) {
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ObjPtr<Class> interface = GetDirectInterface(self, h_this.Get(), i);
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if (interface == nullptr) {
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os << StringPrintf(" %2zd: nullptr!\n", i);
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} else {
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ObjPtr<ClassLoader> cl = interface->GetClassLoader();
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os << StringPrintf(" %2zd: %s (cl=%p)\n", i, PrettyClass(interface).c_str(), cl.Ptr());
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}
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}
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}
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if (!IsLoaded()) {
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os << " class not yet loaded";
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} else {
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// After this point, this may have moved due to GetDirectInterface.
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os << " vtable (" << h_this->NumVirtualMethods() << " entries, "
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<< (h_super != nullptr ? h_super->NumVirtualMethods() : 0) << " in super):\n";
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for (size_t i = 0; i < NumVirtualMethods(); ++i) {
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os << StringPrintf(" %2zd: %s\n", i, ArtMethod::PrettyMethod(
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h_this->GetVirtualMethodDuringLinking(i, image_pointer_size)).c_str());
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}
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os << " direct methods (" << h_this->NumDirectMethods() << " entries):\n";
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for (size_t i = 0; i < h_this->NumDirectMethods(); ++i) {
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os << StringPrintf(" %2zd: %s\n", i, ArtMethod::PrettyMethod(
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h_this->GetDirectMethod(i, image_pointer_size)).c_str());
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}
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if (h_this->NumStaticFields() > 0) {
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os << " static fields (" << h_this->NumStaticFields() << " entries):\n";
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if (h_this->IsResolved()) {
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for (size_t i = 0; i < h_this->NumStaticFields(); ++i) {
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os << StringPrintf(" %2zd: %s\n", i,
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ArtField::PrettyField(h_this->GetStaticField(i)).c_str());
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}
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} else {
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os << " <not yet available>";
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}
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}
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if (h_this->NumInstanceFields() > 0) {
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os << " instance fields (" << h_this->NumInstanceFields() << " entries):\n";
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if (h_this->IsResolved()) {
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for (size_t i = 0; i < h_this->NumInstanceFields(); ++i) {
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os << StringPrintf(" %2zd: %s\n", i,
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ArtField::PrettyField(h_this->GetInstanceField(i)).c_str());
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}
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} else {
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os << " <not yet available>";
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}
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}
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}
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}
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void Class::SetReferenceInstanceOffsets(uint32_t new_reference_offsets) {
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if (kIsDebugBuild && new_reference_offsets != kClassWalkSuper) {
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// Sanity check that the number of bits set in the reference offset bitmap
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// agrees with the number of references
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uint32_t count = 0;
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for (ObjPtr<Class> c = this; c != nullptr; c = c->GetSuperClass()) {
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count += c->NumReferenceInstanceFieldsDuringLinking();
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}
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// +1 for the Class in Object.
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CHECK_EQ(static_cast<uint32_t>(POPCOUNT(new_reference_offsets)) + 1, count);
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}
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// Not called within a transaction.
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SetField32<false>(OFFSET_OF_OBJECT_MEMBER(Class, reference_instance_offsets_),
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new_reference_offsets);
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}
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bool Class::IsInSamePackage(const StringPiece& descriptor1, const StringPiece& descriptor2) {
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size_t i = 0;
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size_t min_length = std::min(descriptor1.size(), descriptor2.size());
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while (i < min_length && descriptor1[i] == descriptor2[i]) {
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++i;
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}
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if (descriptor1.find('/', i) != StringPiece::npos ||
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descriptor2.find('/', i) != StringPiece::npos) {
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return false;
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} else {
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return true;
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}
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}
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bool Class::IsInSamePackage(ObjPtr<Class> that) {
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ObjPtr<Class> klass1 = this;
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ObjPtr<Class> klass2 = that;
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if (klass1 == klass2) {
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return true;
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}
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// Class loaders must match.
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if (klass1->GetClassLoader() != klass2->GetClassLoader()) {
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return false;
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}
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// Arrays are in the same package when their element classes are.
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while (klass1->IsArrayClass()) {
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klass1 = klass1->GetComponentType();
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}
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while (klass2->IsArrayClass()) {
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klass2 = klass2->GetComponentType();
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}
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// trivial check again for array types
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if (klass1 == klass2) {
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return true;
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}
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// Compare the package part of the descriptor string.
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std::string temp1, temp2;
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return IsInSamePackage(klass1->GetDescriptor(&temp1), klass2->GetDescriptor(&temp2));
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}
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bool Class::IsThrowableClass() {
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return WellKnownClasses::ToClass(WellKnownClasses::java_lang_Throwable)->IsAssignableFrom(this);
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}
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void Class::SetClassLoader(ObjPtr<ClassLoader> new_class_loader) {
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if (Runtime::Current()->IsActiveTransaction()) {
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SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(Class, class_loader_), new_class_loader);
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} else {
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SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Class, class_loader_), new_class_loader);
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}
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}
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template <typename SignatureType>
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static inline ArtMethod* FindInterfaceMethodWithSignature(ObjPtr<Class> klass,
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const StringPiece& name,
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const SignatureType& signature,
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PointerSize pointer_size)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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// If the current class is not an interface, skip the search of its declared methods;
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// such lookup is used only to distinguish between IncompatibleClassChangeError and
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// NoSuchMethodError and the caller has already tried to search methods in the class.
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if (LIKELY(klass->IsInterface())) {
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// Search declared methods, both direct and virtual.
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// (This lookup is used also for invoke-static on interface classes.)
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for (ArtMethod& method : klass->GetDeclaredMethodsSlice(pointer_size)) {
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if (method.GetName() == name && method.GetSignature() == signature) {
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return &method;
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}
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}
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}
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// TODO: If there is a unique maximally-specific non-abstract superinterface method,
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// we should return it, otherwise an arbitrary one can be returned.
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ObjPtr<IfTable> iftable = klass->GetIfTable();
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for (int32_t i = 0, iftable_count = iftable->Count(); i < iftable_count; ++i) {
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ObjPtr<Class> iface = iftable->GetInterface(i);
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for (ArtMethod& method : iface->GetVirtualMethodsSlice(pointer_size)) {
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if (method.GetName() == name && method.GetSignature() == signature) {
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return &method;
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}
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}
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}
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// Then search for public non-static methods in the java.lang.Object.
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if (LIKELY(klass->IsInterface())) {
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ObjPtr<Class> object_class = klass->GetSuperClass();
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DCHECK(object_class->IsObjectClass());
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for (ArtMethod& method : object_class->GetDeclaredMethodsSlice(pointer_size)) {
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if (method.IsPublic() && !method.IsStatic() &&
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method.GetName() == name && method.GetSignature() == signature) {
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return &method;
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}
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}
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}
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return nullptr;
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}
|
|
|
|
ArtMethod* Class::FindInterfaceMethod(const StringPiece& name,
|
|
const StringPiece& signature,
|
|
PointerSize pointer_size) {
|
|
return FindInterfaceMethodWithSignature(this, name, signature, pointer_size);
|
|
}
|
|
|
|
ArtMethod* Class::FindInterfaceMethod(const StringPiece& name,
|
|
const Signature& signature,
|
|
PointerSize pointer_size) {
|
|
return FindInterfaceMethodWithSignature(this, name, signature, pointer_size);
|
|
}
|
|
|
|
ArtMethod* Class::FindInterfaceMethod(ObjPtr<DexCache> dex_cache,
|
|
uint32_t dex_method_idx,
|
|
PointerSize pointer_size) {
|
|
// We always search by name and signature, ignoring the type index in the MethodId.
|
|
const DexFile& dex_file = *dex_cache->GetDexFile();
|
|
const DexFile::MethodId& method_id = dex_file.GetMethodId(dex_method_idx);
|
|
StringPiece name = dex_file.StringDataByIdx(method_id.name_idx_);
|
|
const Signature signature = dex_file.GetMethodSignature(method_id);
|
|
return FindInterfaceMethod(name, signature, pointer_size);
|
|
}
|
|
|
|
static inline bool IsValidInheritanceCheck(ObjPtr<mirror::Class> klass,
|
|
ObjPtr<mirror::Class> declaring_class)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
if (klass->IsArrayClass()) {
|
|
return declaring_class->IsObjectClass();
|
|
} else if (klass->IsInterface()) {
|
|
return declaring_class->IsObjectClass() || declaring_class == klass;
|
|
} else {
|
|
return klass->IsSubClass(declaring_class);
|
|
}
|
|
}
|
|
|
|
static inline bool IsInheritedMethod(ObjPtr<mirror::Class> klass,
|
|
ObjPtr<mirror::Class> declaring_class,
|
|
ArtMethod& method)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
DCHECK_EQ(declaring_class, method.GetDeclaringClass());
|
|
DCHECK_NE(klass, declaring_class);
|
|
DCHECK(IsValidInheritanceCheck(klass, declaring_class));
|
|
uint32_t access_flags = method.GetAccessFlags();
|
|
if ((access_flags & (kAccPublic | kAccProtected)) != 0) {
|
|
return true;
|
|
}
|
|
if ((access_flags & kAccPrivate) != 0) {
|
|
return false;
|
|
}
|
|
for (; klass != declaring_class; klass = klass->GetSuperClass()) {
|
|
if (!klass->IsInSamePackage(declaring_class)) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
template <typename SignatureType>
|
|
static inline ArtMethod* FindClassMethodWithSignature(ObjPtr<Class> this_klass,
|
|
const StringPiece& name,
|
|
const SignatureType& signature,
|
|
PointerSize pointer_size)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
// Search declared methods first.
|
|
for (ArtMethod& method : this_klass->GetDeclaredMethodsSlice(pointer_size)) {
|
|
ArtMethod* np_method = method.GetInterfaceMethodIfProxy(pointer_size);
|
|
if (np_method->GetName() == name && np_method->GetSignature() == signature) {
|
|
return &method;
|
|
}
|
|
}
|
|
|
|
// Then search the superclass chain. If we find an inherited method, return it.
|
|
// If we find a method that's not inherited because of access restrictions,
|
|
// try to find a method inherited from an interface in copied methods.
|
|
ObjPtr<Class> klass = this_klass->GetSuperClass();
|
|
ArtMethod* uninherited_method = nullptr;
|
|
for (; klass != nullptr; klass = klass->GetSuperClass()) {
|
|
DCHECK(!klass->IsProxyClass());
|
|
for (ArtMethod& method : klass->GetDeclaredMethodsSlice(pointer_size)) {
|
|
if (method.GetName() == name && method.GetSignature() == signature) {
|
|
if (IsInheritedMethod(this_klass, klass, method)) {
|
|
return &method;
|
|
}
|
|
uninherited_method = &method;
|
|
break;
|
|
}
|
|
}
|
|
if (uninherited_method != nullptr) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Then search copied methods.
|
|
// If we found a method that's not inherited, stop the search in its declaring class.
|
|
ObjPtr<Class> end_klass = klass;
|
|
DCHECK_EQ(uninherited_method != nullptr, end_klass != nullptr);
|
|
klass = this_klass;
|
|
if (UNLIKELY(klass->IsProxyClass())) {
|
|
DCHECK(klass->GetCopiedMethodsSlice(pointer_size).empty());
|
|
klass = klass->GetSuperClass();
|
|
}
|
|
for (; klass != end_klass; klass = klass->GetSuperClass()) {
|
|
DCHECK(!klass->IsProxyClass());
|
|
for (ArtMethod& method : klass->GetCopiedMethodsSlice(pointer_size)) {
|
|
if (method.GetName() == name && method.GetSignature() == signature) {
|
|
return &method; // No further check needed, copied methods are inherited by definition.
|
|
}
|
|
}
|
|
}
|
|
return uninherited_method; // Return the `uninherited_method` if any.
|
|
}
|
|
|
|
|
|
ArtMethod* Class::FindClassMethod(const StringPiece& name,
|
|
const StringPiece& signature,
|
|
PointerSize pointer_size) {
|
|
return FindClassMethodWithSignature(this, name, signature, pointer_size);
|
|
}
|
|
|
|
ArtMethod* Class::FindClassMethod(const StringPiece& name,
|
|
const Signature& signature,
|
|
PointerSize pointer_size) {
|
|
return FindClassMethodWithSignature(this, name, signature, pointer_size);
|
|
}
|
|
|
|
ArtMethod* Class::FindClassMethod(ObjPtr<DexCache> dex_cache,
|
|
uint32_t dex_method_idx,
|
|
PointerSize pointer_size) {
|
|
// FIXME: Hijacking a proxy class by a custom class loader can break this assumption.
|
|
DCHECK(!IsProxyClass());
|
|
|
|
// First try to find a declared method by dex_method_idx if we have a dex_cache match.
|
|
ObjPtr<DexCache> this_dex_cache = GetDexCache();
|
|
if (this_dex_cache == dex_cache) {
|
|
// Lookup is always performed in the class referenced by the MethodId.
|
|
DCHECK_EQ(dex_type_idx_, GetDexFile().GetMethodId(dex_method_idx).class_idx_.index_);
|
|
for (ArtMethod& method : GetDeclaredMethodsSlice(pointer_size)) {
|
|
if (method.GetDexMethodIndex() == dex_method_idx) {
|
|
return &method;
|
|
}
|
|
}
|
|
}
|
|
// If not found, we need to search by name and signature.
|
|
const DexFile& dex_file = *dex_cache->GetDexFile();
|
|
const DexFile::MethodId& method_id = dex_file.GetMethodId(dex_method_idx);
|
|
const Signature signature = dex_file.GetMethodSignature(method_id);
|
|
StringPiece name; // Delay strlen() until actually needed.
|
|
// If we do not have a dex_cache match, try to find the declared method in this class now.
|
|
if (this_dex_cache != dex_cache && !GetDeclaredMethodsSlice(pointer_size).empty()) {
|
|
DCHECK(name.empty());
|
|
name = dex_file.StringDataByIdx(method_id.name_idx_);
|
|
for (ArtMethod& method : GetDeclaredMethodsSlice(pointer_size)) {
|
|
if (method.GetName() == name && method.GetSignature() == signature) {
|
|
return &method;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Then search the superclass chain. If we find an inherited method, return it.
|
|
// If we find a method that's not inherited because of access restrictions,
|
|
// try to find a method inherited from an interface in copied methods.
|
|
ArtMethod* uninherited_method = nullptr;
|
|
ObjPtr<Class> klass = GetSuperClass();
|
|
for (; klass != nullptr; klass = klass->GetSuperClass()) {
|
|
ArtMethod* candidate_method = nullptr;
|
|
ArraySlice<ArtMethod> declared_methods = klass->GetDeclaredMethodsSlice(pointer_size);
|
|
if (klass->GetDexCache() == dex_cache) {
|
|
// Matching dex_cache. We cannot compare the `dex_method_idx` anymore because
|
|
// the type index differs, so compare the name index and proto index.
|
|
for (ArtMethod& method : declared_methods) {
|
|
const DexFile::MethodId& cmp_method_id = dex_file.GetMethodId(method.GetDexMethodIndex());
|
|
if (cmp_method_id.name_idx_ == method_id.name_idx_ &&
|
|
cmp_method_id.proto_idx_ == method_id.proto_idx_) {
|
|
candidate_method = &method;
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
if (!declared_methods.empty() && name.empty()) {
|
|
name = dex_file.StringDataByIdx(method_id.name_idx_);
|
|
}
|
|
for (ArtMethod& method : declared_methods) {
|
|
if (method.GetName() == name && method.GetSignature() == signature) {
|
|
candidate_method = &method;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (candidate_method != nullptr) {
|
|
if (IsInheritedMethod(this, klass, *candidate_method)) {
|
|
return candidate_method;
|
|
} else {
|
|
uninherited_method = candidate_method;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Then search copied methods.
|
|
// If we found a method that's not inherited, stop the search in its declaring class.
|
|
ObjPtr<Class> end_klass = klass;
|
|
DCHECK_EQ(uninherited_method != nullptr, end_klass != nullptr);
|
|
// After we have searched the declared methods of the super-class chain,
|
|
// search copied methods which can contain methods from interfaces.
|
|
for (klass = this; klass != end_klass; klass = klass->GetSuperClass()) {
|
|
ArraySlice<ArtMethod> copied_methods = klass->GetCopiedMethodsSlice(pointer_size);
|
|
if (!copied_methods.empty() && name.empty()) {
|
|
name = dex_file.StringDataByIdx(method_id.name_idx_);
|
|
}
|
|
for (ArtMethod& method : copied_methods) {
|
|
if (method.GetName() == name && method.GetSignature() == signature) {
|
|
return &method; // No further check needed, copied methods are inherited by definition.
|
|
}
|
|
}
|
|
}
|
|
return uninherited_method; // Return the `uninherited_method` if any.
|
|
}
|
|
|
|
ArtMethod* Class::FindConstructor(const StringPiece& signature, PointerSize pointer_size) {
|
|
// Internal helper, never called on proxy classes. We can skip GetInterfaceMethodIfProxy().
|
|
DCHECK(!IsProxyClass());
|
|
StringPiece name("<init>");
|
|
for (ArtMethod& method : GetDirectMethodsSliceUnchecked(pointer_size)) {
|
|
if (method.GetName() == name && method.GetSignature() == signature) {
|
|
return &method;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
ArtMethod* Class::FindDeclaredDirectMethodByName(const StringPiece& name,
|
|
PointerSize pointer_size) {
|
|
for (auto& method : GetDirectMethods(pointer_size)) {
|
|
ArtMethod* const np_method = method.GetInterfaceMethodIfProxy(pointer_size);
|
|
if (name == np_method->GetName()) {
|
|
return &method;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
ArtMethod* Class::FindDeclaredVirtualMethodByName(const StringPiece& name,
|
|
PointerSize pointer_size) {
|
|
for (auto& method : GetVirtualMethods(pointer_size)) {
|
|
ArtMethod* const np_method = method.GetInterfaceMethodIfProxy(pointer_size);
|
|
if (name == np_method->GetName()) {
|
|
return &method;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
ArtMethod* Class::FindVirtualMethodForInterfaceSuper(ArtMethod* method, PointerSize pointer_size) {
|
|
DCHECK(method->GetDeclaringClass()->IsInterface());
|
|
DCHECK(IsInterface()) << "Should only be called on a interface class";
|
|
// Check if we have one defined on this interface first. This includes searching copied ones to
|
|
// get any conflict methods. Conflict methods are copied into each subtype from the supertype. We
|
|
// don't do any indirect method checks here.
|
|
for (ArtMethod& iface_method : GetVirtualMethods(pointer_size)) {
|
|
if (method->HasSameNameAndSignature(&iface_method)) {
|
|
return &iface_method;
|
|
}
|
|
}
|
|
|
|
std::vector<ArtMethod*> abstract_methods;
|
|
// Search through the IFTable for a working version. We don't need to check for conflicts
|
|
// because if there was one it would appear in this classes virtual_methods_ above.
|
|
|
|
Thread* self = Thread::Current();
|
|
StackHandleScope<2> hs(self);
|
|
MutableHandle<IfTable> iftable(hs.NewHandle(GetIfTable()));
|
|
MutableHandle<Class> iface(hs.NewHandle<Class>(nullptr));
|
|
size_t iftable_count = GetIfTableCount();
|
|
// Find the method. We don't need to check for conflicts because they would have been in the
|
|
// copied virtuals of this interface. Order matters, traverse in reverse topological order; most
|
|
// subtypiest interfaces get visited first.
|
|
for (size_t k = iftable_count; k != 0;) {
|
|
k--;
|
|
DCHECK_LT(k, iftable->Count());
|
|
iface.Assign(iftable->GetInterface(k));
|
|
// Iterate through every declared method on this interface. Each direct method's name/signature
|
|
// is unique so the order of the inner loop doesn't matter.
|
|
for (auto& method_iter : iface->GetDeclaredVirtualMethods(pointer_size)) {
|
|
ArtMethod* current_method = &method_iter;
|
|
if (current_method->HasSameNameAndSignature(method)) {
|
|
if (current_method->IsDefault()) {
|
|
// Handle JLS soft errors, a default method from another superinterface tree can
|
|
// "override" an abstract method(s) from another superinterface tree(s). To do this,
|
|
// ignore any [default] method which are dominated by the abstract methods we've seen so
|
|
// far. Check if overridden by any in abstract_methods. We do not need to check for
|
|
// default_conflicts because we would hit those before we get to this loop.
|
|
bool overridden = false;
|
|
for (ArtMethod* possible_override : abstract_methods) {
|
|
DCHECK(possible_override->HasSameNameAndSignature(current_method));
|
|
if (iface->IsAssignableFrom(possible_override->GetDeclaringClass())) {
|
|
overridden = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!overridden) {
|
|
return current_method;
|
|
}
|
|
} else {
|
|
// Is not default.
|
|
// This might override another default method. Just stash it for now.
|
|
abstract_methods.push_back(current_method);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// If we reach here we either never found any declaration of the method (in which case
|
|
// 'abstract_methods' is empty or we found no non-overriden default methods in which case
|
|
// 'abstract_methods' contains a number of abstract implementations of the methods. We choose one
|
|
// of these arbitrarily.
|
|
return abstract_methods.empty() ? nullptr : abstract_methods[0];
|
|
}
|
|
|
|
ArtMethod* Class::FindClassInitializer(PointerSize pointer_size) {
|
|
for (ArtMethod& method : GetDirectMethods(pointer_size)) {
|
|
if (method.IsClassInitializer()) {
|
|
DCHECK_STREQ(method.GetName(), "<clinit>");
|
|
DCHECK_STREQ(method.GetSignature().ToString().c_str(), "()V");
|
|
return &method;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// Custom binary search to avoid double comparisons from std::binary_search.
|
|
static ArtField* FindFieldByNameAndType(LengthPrefixedArray<ArtField>* fields,
|
|
const StringPiece& name,
|
|
const StringPiece& type)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
if (fields == nullptr) {
|
|
return nullptr;
|
|
}
|
|
size_t low = 0;
|
|
size_t high = fields->size();
|
|
ArtField* ret = nullptr;
|
|
while (low < high) {
|
|
size_t mid = (low + high) / 2;
|
|
ArtField& field = fields->At(mid);
|
|
// Fields are sorted by class, then name, then type descriptor. This is verified in dex file
|
|
// verifier. There can be multiple fields with the same in the same class name due to proguard.
|
|
int result = StringPiece(field.GetName()).Compare(name);
|
|
if (result == 0) {
|
|
result = StringPiece(field.GetTypeDescriptor()).Compare(type);
|
|
}
|
|
if (result < 0) {
|
|
low = mid + 1;
|
|
} else if (result > 0) {
|
|
high = mid;
|
|
} else {
|
|
ret = &field;
|
|
break;
|
|
}
|
|
}
|
|
if (kIsDebugBuild) {
|
|
ArtField* found = nullptr;
|
|
for (ArtField& field : MakeIterationRangeFromLengthPrefixedArray(fields)) {
|
|
if (name == field.GetName() && type == field.GetTypeDescriptor()) {
|
|
found = &field;
|
|
break;
|
|
}
|
|
}
|
|
CHECK_EQ(found, ret) << "Found " << found->PrettyField() << " vs " << ret->PrettyField();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
ArtField* Class::FindDeclaredInstanceField(const StringPiece& name, const StringPiece& type) {
|
|
// Binary search by name. Interfaces are not relevant because they can't contain instance fields.
|
|
return FindFieldByNameAndType(GetIFieldsPtr(), name, type);
|
|
}
|
|
|
|
ArtField* Class::FindDeclaredInstanceField(ObjPtr<DexCache> dex_cache, uint32_t dex_field_idx) {
|
|
if (GetDexCache() == dex_cache) {
|
|
for (ArtField& field : GetIFields()) {
|
|
if (field.GetDexFieldIndex() == dex_field_idx) {
|
|
return &field;
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
ArtField* Class::FindInstanceField(const StringPiece& name, const StringPiece& type) {
|
|
// Is the field in this class, or any of its superclasses?
|
|
// Interfaces are not relevant because they can't contain instance fields.
|
|
for (ObjPtr<Class> c = this; c != nullptr; c = c->GetSuperClass()) {
|
|
ArtField* f = c->FindDeclaredInstanceField(name, type);
|
|
if (f != nullptr) {
|
|
return f;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
ArtField* Class::FindInstanceField(ObjPtr<DexCache> dex_cache, uint32_t dex_field_idx) {
|
|
// Is the field in this class, or any of its superclasses?
|
|
// Interfaces are not relevant because they can't contain instance fields.
|
|
for (ObjPtr<Class> c = this; c != nullptr; c = c->GetSuperClass()) {
|
|
ArtField* f = c->FindDeclaredInstanceField(dex_cache, dex_field_idx);
|
|
if (f != nullptr) {
|
|
return f;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
ArtField* Class::FindDeclaredStaticField(const StringPiece& name, const StringPiece& type) {
|
|
DCHECK(type != nullptr);
|
|
return FindFieldByNameAndType(GetSFieldsPtr(), name, type);
|
|
}
|
|
|
|
ArtField* Class::FindDeclaredStaticField(ObjPtr<DexCache> dex_cache, uint32_t dex_field_idx) {
|
|
if (dex_cache == GetDexCache()) {
|
|
for (ArtField& field : GetSFields()) {
|
|
if (field.GetDexFieldIndex() == dex_field_idx) {
|
|
return &field;
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
ArtField* Class::FindStaticField(Thread* self,
|
|
ObjPtr<Class> klass,
|
|
const StringPiece& name,
|
|
const StringPiece& type) {
|
|
// Is the field in this class (or its interfaces), or any of its
|
|
// superclasses (or their interfaces)?
|
|
for (ObjPtr<Class> k = klass; k != nullptr; k = k->GetSuperClass()) {
|
|
// Is the field in this class?
|
|
ArtField* f = k->FindDeclaredStaticField(name, type);
|
|
if (f != nullptr) {
|
|
return f;
|
|
}
|
|
// Is this field in any of this class' interfaces?
|
|
for (uint32_t i = 0, num_interfaces = k->NumDirectInterfaces(); i != num_interfaces; ++i) {
|
|
ObjPtr<Class> interface = GetDirectInterface(self, k, i);
|
|
DCHECK(interface != nullptr);
|
|
f = FindStaticField(self, interface, name, type);
|
|
if (f != nullptr) {
|
|
return f;
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
ArtField* Class::FindStaticField(Thread* self,
|
|
ObjPtr<Class> klass,
|
|
ObjPtr<DexCache> dex_cache,
|
|
uint32_t dex_field_idx) {
|
|
for (ObjPtr<Class> k = klass; k != nullptr; k = k->GetSuperClass()) {
|
|
// Is the field in this class?
|
|
ArtField* f = k->FindDeclaredStaticField(dex_cache, dex_field_idx);
|
|
if (f != nullptr) {
|
|
return f;
|
|
}
|
|
// Though GetDirectInterface() should not cause thread suspension when called
|
|
// from here, it takes a Handle as an argument, so we need to wrap `k`.
|
|
ScopedAssertNoThreadSuspension ants(__FUNCTION__);
|
|
// Is this field in any of this class' interfaces?
|
|
for (uint32_t i = 0, num_interfaces = k->NumDirectInterfaces(); i != num_interfaces; ++i) {
|
|
ObjPtr<Class> interface = GetDirectInterface(self, k, i);
|
|
DCHECK(interface != nullptr);
|
|
f = FindStaticField(self, interface, dex_cache, dex_field_idx);
|
|
if (f != nullptr) {
|
|
return f;
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
ArtField* Class::FindField(Thread* self,
|
|
ObjPtr<Class> klass,
|
|
const StringPiece& name,
|
|
const StringPiece& type) {
|
|
// Find a field using the JLS field resolution order
|
|
for (ObjPtr<Class> k = klass; k != nullptr; k = k->GetSuperClass()) {
|
|
// Is the field in this class?
|
|
ArtField* f = k->FindDeclaredInstanceField(name, type);
|
|
if (f != nullptr) {
|
|
return f;
|
|
}
|
|
f = k->FindDeclaredStaticField(name, type);
|
|
if (f != nullptr) {
|
|
return f;
|
|
}
|
|
// Is this field in any of this class' interfaces?
|
|
for (uint32_t i = 0, num_interfaces = k->NumDirectInterfaces(); i != num_interfaces; ++i) {
|
|
ObjPtr<Class> interface = GetDirectInterface(self, k, i);
|
|
DCHECK(interface != nullptr);
|
|
f = FindStaticField(self, interface, name, type);
|
|
if (f != nullptr) {
|
|
return f;
|
|
}
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void Class::SetSkipAccessChecksFlagOnAllMethods(PointerSize pointer_size) {
|
|
DCHECK(IsVerified());
|
|
for (auto& m : GetMethods(pointer_size)) {
|
|
if (!m.IsNative() && m.IsInvokable()) {
|
|
m.SetSkipAccessChecks();
|
|
}
|
|
}
|
|
}
|
|
|
|
const char* Class::GetDescriptor(std::string* storage) {
|
|
if (IsPrimitive()) {
|
|
return Primitive::Descriptor(GetPrimitiveType());
|
|
} else if (IsArrayClass()) {
|
|
return GetArrayDescriptor(storage);
|
|
} else if (IsProxyClass()) {
|
|
*storage = Runtime::Current()->GetClassLinker()->GetDescriptorForProxy(this);
|
|
return storage->c_str();
|
|
} else {
|
|
const DexFile& dex_file = GetDexFile();
|
|
const DexFile::TypeId& type_id = dex_file.GetTypeId(GetClassDef()->class_idx_);
|
|
return dex_file.GetTypeDescriptor(type_id);
|
|
}
|
|
}
|
|
|
|
const char* Class::GetArrayDescriptor(std::string* storage) {
|
|
std::string temp;
|
|
const char* elem_desc = GetComponentType()->GetDescriptor(&temp);
|
|
*storage = "[";
|
|
*storage += elem_desc;
|
|
return storage->c_str();
|
|
}
|
|
|
|
const DexFile::ClassDef* Class::GetClassDef() {
|
|
uint16_t class_def_idx = GetDexClassDefIndex();
|
|
if (class_def_idx == DexFile::kDexNoIndex16) {
|
|
return nullptr;
|
|
}
|
|
return &GetDexFile().GetClassDef(class_def_idx);
|
|
}
|
|
|
|
dex::TypeIndex Class::GetDirectInterfaceTypeIdx(uint32_t idx) {
|
|
DCHECK(!IsPrimitive());
|
|
DCHECK(!IsArrayClass());
|
|
return GetInterfaceTypeList()->GetTypeItem(idx).type_idx_;
|
|
}
|
|
|
|
ObjPtr<Class> Class::GetDirectInterface(Thread* self, ObjPtr<Class> klass, uint32_t idx) {
|
|
DCHECK(klass != nullptr);
|
|
DCHECK(!klass->IsPrimitive());
|
|
if (klass->IsArrayClass()) {
|
|
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
|
|
// Use ClassLinker::LookupClass(); avoid poisoning ObjPtr<>s by ClassLinker::FindSystemClass().
|
|
ObjPtr<Class> interface;
|
|
if (idx == 0) {
|
|
interface = class_linker->LookupClass(self, "Ljava/lang/Cloneable;", nullptr);
|
|
} else {
|
|
DCHECK_EQ(1U, idx);
|
|
interface = class_linker->LookupClass(self, "Ljava/io/Serializable;", nullptr);
|
|
}
|
|
DCHECK(interface != nullptr);
|
|
return interface;
|
|
} else if (klass->IsProxyClass()) {
|
|
ObjPtr<ObjectArray<Class>> interfaces = klass->GetProxyInterfaces();
|
|
DCHECK(interfaces != nullptr);
|
|
return interfaces->Get(idx);
|
|
} else {
|
|
dex::TypeIndex type_idx = klass->GetDirectInterfaceTypeIdx(idx);
|
|
ObjPtr<Class> interface = ClassLinker::LookupResolvedType(
|
|
type_idx, klass->GetDexCache(), klass->GetClassLoader());
|
|
return interface;
|
|
}
|
|
}
|
|
|
|
ObjPtr<Class> Class::ResolveDirectInterface(Thread* self, Handle<Class> klass, uint32_t idx) {
|
|
ObjPtr<Class> interface = GetDirectInterface(self, klass.Get(), idx);
|
|
if (interface == nullptr) {
|
|
DCHECK(!klass->IsArrayClass());
|
|
DCHECK(!klass->IsProxyClass());
|
|
dex::TypeIndex type_idx = klass->GetDirectInterfaceTypeIdx(idx);
|
|
interface = Runtime::Current()->GetClassLinker()->ResolveType(klass->GetDexFile(),
|
|
type_idx,
|
|
klass.Get());
|
|
CHECK(interface != nullptr || self->IsExceptionPending());
|
|
}
|
|
return interface;
|
|
}
|
|
|
|
ObjPtr<Class> Class::GetCommonSuperClass(Handle<Class> klass) {
|
|
DCHECK(klass != nullptr);
|
|
DCHECK(!klass->IsInterface());
|
|
DCHECK(!IsInterface());
|
|
ObjPtr<Class> common_super_class = this;
|
|
while (!common_super_class->IsAssignableFrom(klass.Get())) {
|
|
ObjPtr<Class> old_common = common_super_class;
|
|
common_super_class = old_common->GetSuperClass();
|
|
DCHECK(common_super_class != nullptr) << old_common->PrettyClass();
|
|
}
|
|
return common_super_class;
|
|
}
|
|
|
|
const char* Class::GetSourceFile() {
|
|
const DexFile& dex_file = GetDexFile();
|
|
const DexFile::ClassDef* dex_class_def = GetClassDef();
|
|
if (dex_class_def == nullptr) {
|
|
// Generated classes have no class def.
|
|
return nullptr;
|
|
}
|
|
return dex_file.GetSourceFile(*dex_class_def);
|
|
}
|
|
|
|
std::string Class::GetLocation() {
|
|
ObjPtr<DexCache> dex_cache = GetDexCache();
|
|
if (dex_cache != nullptr && !IsProxyClass()) {
|
|
return dex_cache->GetLocation()->ToModifiedUtf8();
|
|
}
|
|
// Arrays and proxies are generated and have no corresponding dex file location.
|
|
return "generated class";
|
|
}
|
|
|
|
const DexFile::TypeList* Class::GetInterfaceTypeList() {
|
|
const DexFile::ClassDef* class_def = GetClassDef();
|
|
if (class_def == nullptr) {
|
|
return nullptr;
|
|
}
|
|
return GetDexFile().GetInterfacesList(*class_def);
|
|
}
|
|
|
|
void Class::PopulateEmbeddedVTable(PointerSize pointer_size) {
|
|
PointerArray* table = GetVTableDuringLinking();
|
|
CHECK(table != nullptr) << PrettyClass();
|
|
const size_t table_length = table->GetLength();
|
|
SetEmbeddedVTableLength(table_length);
|
|
for (size_t i = 0; i < table_length; i++) {
|
|
SetEmbeddedVTableEntry(i, table->GetElementPtrSize<ArtMethod*>(i, pointer_size), pointer_size);
|
|
}
|
|
// Keep java.lang.Object class's vtable around for since it's easier
|
|
// to be reused by array classes during their linking.
|
|
if (!IsObjectClass()) {
|
|
SetVTable(nullptr);
|
|
}
|
|
}
|
|
|
|
class ReadBarrierOnNativeRootsVisitor {
|
|
public:
|
|
void operator()(ObjPtr<Object> obj ATTRIBUTE_UNUSED,
|
|
MemberOffset offset ATTRIBUTE_UNUSED,
|
|
bool is_static ATTRIBUTE_UNUSED) const {}
|
|
|
|
void VisitRootIfNonNull(CompressedReference<Object>* root) const
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
if (!root->IsNull()) {
|
|
VisitRoot(root);
|
|
}
|
|
}
|
|
|
|
void VisitRoot(CompressedReference<Object>* root) const
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
ObjPtr<Object> old_ref = root->AsMirrorPtr();
|
|
ObjPtr<Object> new_ref = ReadBarrier::BarrierForRoot(root);
|
|
if (old_ref != new_ref) {
|
|
// Update the field atomically. This may fail if mutator updates before us, but it's ok.
|
|
auto* atomic_root =
|
|
reinterpret_cast<Atomic<CompressedReference<Object>>*>(root);
|
|
atomic_root->CompareExchangeStrongSequentiallyConsistent(
|
|
CompressedReference<Object>::FromMirrorPtr(old_ref.Ptr()),
|
|
CompressedReference<Object>::FromMirrorPtr(new_ref.Ptr()));
|
|
}
|
|
}
|
|
};
|
|
|
|
// The pre-fence visitor for Class::CopyOf().
|
|
class CopyClassVisitor {
|
|
public:
|
|
CopyClassVisitor(Thread* self,
|
|
Handle<Class>* orig,
|
|
size_t new_length,
|
|
size_t copy_bytes,
|
|
ImTable* imt,
|
|
PointerSize pointer_size)
|
|
: self_(self), orig_(orig), new_length_(new_length),
|
|
copy_bytes_(copy_bytes), imt_(imt), pointer_size_(pointer_size) {
|
|
}
|
|
|
|
void operator()(ObjPtr<Object> obj, size_t usable_size ATTRIBUTE_UNUSED) const
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
StackHandleScope<1> hs(self_);
|
|
Handle<mirror::Class> h_new_class_obj(hs.NewHandle(obj->AsClass()));
|
|
Object::CopyObject(h_new_class_obj.Get(), orig_->Get(), copy_bytes_);
|
|
Class::SetStatus(h_new_class_obj, Class::kStatusResolving, self_);
|
|
h_new_class_obj->PopulateEmbeddedVTable(pointer_size_);
|
|
h_new_class_obj->SetImt(imt_, pointer_size_);
|
|
h_new_class_obj->SetClassSize(new_length_);
|
|
// Visit all of the references to make sure there is no from space references in the native
|
|
// roots.
|
|
ObjPtr<Object>(h_new_class_obj.Get())->VisitReferences(
|
|
ReadBarrierOnNativeRootsVisitor(), VoidFunctor());
|
|
}
|
|
|
|
private:
|
|
Thread* const self_;
|
|
Handle<Class>* const orig_;
|
|
const size_t new_length_;
|
|
const size_t copy_bytes_;
|
|
ImTable* imt_;
|
|
const PointerSize pointer_size_;
|
|
DISALLOW_COPY_AND_ASSIGN(CopyClassVisitor);
|
|
};
|
|
|
|
Class* Class::CopyOf(Thread* self, int32_t new_length, ImTable* imt, PointerSize pointer_size) {
|
|
DCHECK_GE(new_length, static_cast<int32_t>(sizeof(Class)));
|
|
// We may get copied by a compacting GC.
|
|
StackHandleScope<1> hs(self);
|
|
Handle<Class> h_this(hs.NewHandle(this));
|
|
gc::Heap* heap = Runtime::Current()->GetHeap();
|
|
// The num_bytes (3rd param) is sizeof(Class) as opposed to SizeOf()
|
|
// to skip copying the tail part that we will overwrite here.
|
|
CopyClassVisitor visitor(self, &h_this, new_length, sizeof(Class), imt, pointer_size);
|
|
ObjPtr<Object> new_class = kMovingClasses ?
|
|
heap->AllocObject<true>(self, java_lang_Class_.Read(), new_length, visitor) :
|
|
heap->AllocNonMovableObject<true>(self, java_lang_Class_.Read(), new_length, visitor);
|
|
if (UNLIKELY(new_class == nullptr)) {
|
|
self->AssertPendingOOMException();
|
|
return nullptr;
|
|
}
|
|
return new_class->AsClass();
|
|
}
|
|
|
|
bool Class::ProxyDescriptorEquals(const char* match) {
|
|
DCHECK(IsProxyClass());
|
|
return Runtime::Current()->GetClassLinker()->GetDescriptorForProxy(this) == match;
|
|
}
|
|
|
|
// TODO: Move this to java_lang_Class.cc?
|
|
ArtMethod* Class::GetDeclaredConstructor(
|
|
Thread* self, Handle<ObjectArray<Class>> args, PointerSize pointer_size) {
|
|
for (auto& m : GetDirectMethods(pointer_size)) {
|
|
// Skip <clinit> which is a static constructor, as well as non constructors.
|
|
if (m.IsStatic() || !m.IsConstructor()) {
|
|
continue;
|
|
}
|
|
// May cause thread suspension and exceptions.
|
|
if (m.GetInterfaceMethodIfProxy(kRuntimePointerSize)->EqualParameters(args)) {
|
|
return &m;
|
|
}
|
|
if (UNLIKELY(self->IsExceptionPending())) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
uint32_t Class::Depth() {
|
|
uint32_t depth = 0;
|
|
for (ObjPtr<Class> klass = this; klass->GetSuperClass() != nullptr; klass = klass->GetSuperClass()) {
|
|
depth++;
|
|
}
|
|
return depth;
|
|
}
|
|
|
|
dex::TypeIndex Class::FindTypeIndexInOtherDexFile(const DexFile& dex_file) {
|
|
std::string temp;
|
|
const DexFile::TypeId* type_id = dex_file.FindTypeId(GetDescriptor(&temp));
|
|
return (type_id == nullptr) ? dex::TypeIndex() : dex_file.GetIndexForTypeId(*type_id);
|
|
}
|
|
|
|
template <PointerSize kPointerSize, bool kTransactionActive>
|
|
ObjPtr<Method> Class::GetDeclaredMethodInternal(
|
|
Thread* self,
|
|
ObjPtr<Class> klass,
|
|
ObjPtr<String> name,
|
|
ObjPtr<ObjectArray<Class>> args) {
|
|
// Covariant return types permit the class to define multiple
|
|
// methods with the same name and parameter types. Prefer to
|
|
// return a non-synthetic method in such situations. We may
|
|
// still return a synthetic method to handle situations like
|
|
// escalated visibility. We never return miranda methods that
|
|
// were synthesized by the runtime.
|
|
constexpr uint32_t kSkipModifiers = kAccMiranda | kAccSynthetic;
|
|
StackHandleScope<3> hs(self);
|
|
auto h_method_name = hs.NewHandle(name);
|
|
if (UNLIKELY(h_method_name == nullptr)) {
|
|
ThrowNullPointerException("name == null");
|
|
return nullptr;
|
|
}
|
|
auto h_args = hs.NewHandle(args);
|
|
Handle<Class> h_klass = hs.NewHandle(klass);
|
|
ArtMethod* result = nullptr;
|
|
for (auto& m : h_klass->GetDeclaredVirtualMethods(kPointerSize)) {
|
|
auto* np_method = m.GetInterfaceMethodIfProxy(kPointerSize);
|
|
// May cause thread suspension.
|
|
ObjPtr<String> np_name = np_method->GetNameAsString(self);
|
|
if (!np_name->Equals(h_method_name.Get()) || !np_method->EqualParameters(h_args)) {
|
|
if (UNLIKELY(self->IsExceptionPending())) {
|
|
return nullptr;
|
|
}
|
|
continue;
|
|
}
|
|
auto modifiers = m.GetAccessFlags();
|
|
if ((modifiers & kSkipModifiers) == 0) {
|
|
return Method::CreateFromArtMethod<kPointerSize, kTransactionActive>(self, &m);
|
|
}
|
|
if ((modifiers & kAccMiranda) == 0) {
|
|
result = &m; // Remember as potential result if it's not a miranda method.
|
|
}
|
|
}
|
|
if (result == nullptr) {
|
|
for (auto& m : h_klass->GetDirectMethods(kPointerSize)) {
|
|
auto modifiers = m.GetAccessFlags();
|
|
if ((modifiers & kAccConstructor) != 0) {
|
|
continue;
|
|
}
|
|
auto* np_method = m.GetInterfaceMethodIfProxy(kPointerSize);
|
|
// May cause thread suspension.
|
|
ObjPtr<String> np_name = np_method->GetNameAsString(self);
|
|
if (np_name == nullptr) {
|
|
self->AssertPendingException();
|
|
return nullptr;
|
|
}
|
|
if (!np_name->Equals(h_method_name.Get()) || !np_method->EqualParameters(h_args)) {
|
|
if (UNLIKELY(self->IsExceptionPending())) {
|
|
return nullptr;
|
|
}
|
|
continue;
|
|
}
|
|
if ((modifiers & kSkipModifiers) == 0) {
|
|
return Method::CreateFromArtMethod<kPointerSize, kTransactionActive>(self, &m);
|
|
}
|
|
// Direct methods cannot be miranda methods, so this potential result must be synthetic.
|
|
result = &m;
|
|
}
|
|
}
|
|
return result != nullptr
|
|
? Method::CreateFromArtMethod<kPointerSize, kTransactionActive>(self, result)
|
|
: nullptr;
|
|
}
|
|
|
|
template
|
|
ObjPtr<Method> Class::GetDeclaredMethodInternal<PointerSize::k32, false>(
|
|
Thread* self,
|
|
ObjPtr<Class> klass,
|
|
ObjPtr<String> name,
|
|
ObjPtr<ObjectArray<Class>> args);
|
|
template
|
|
ObjPtr<Method> Class::GetDeclaredMethodInternal<PointerSize::k32, true>(
|
|
Thread* self,
|
|
ObjPtr<Class> klass,
|
|
ObjPtr<String> name,
|
|
ObjPtr<ObjectArray<Class>> args);
|
|
template
|
|
ObjPtr<Method> Class::GetDeclaredMethodInternal<PointerSize::k64, false>(
|
|
Thread* self,
|
|
ObjPtr<Class> klass,
|
|
ObjPtr<String> name,
|
|
ObjPtr<ObjectArray<Class>> args);
|
|
template
|
|
ObjPtr<Method> Class::GetDeclaredMethodInternal<PointerSize::k64, true>(
|
|
Thread* self,
|
|
ObjPtr<Class> klass,
|
|
ObjPtr<String> name,
|
|
ObjPtr<ObjectArray<Class>> args);
|
|
|
|
template <PointerSize kPointerSize, bool kTransactionActive>
|
|
ObjPtr<Constructor> Class::GetDeclaredConstructorInternal(
|
|
Thread* self,
|
|
ObjPtr<Class> klass,
|
|
ObjPtr<ObjectArray<Class>> args) {
|
|
StackHandleScope<1> hs(self);
|
|
ArtMethod* result = klass->GetDeclaredConstructor(self, hs.NewHandle(args), kPointerSize);
|
|
return result != nullptr
|
|
? Constructor::CreateFromArtMethod<kPointerSize, kTransactionActive>(self, result)
|
|
: nullptr;
|
|
}
|
|
|
|
// Constructor::CreateFromArtMethod<kTransactionActive>(self, result)
|
|
|
|
template
|
|
ObjPtr<Constructor> Class::GetDeclaredConstructorInternal<PointerSize::k32, false>(
|
|
Thread* self,
|
|
ObjPtr<Class> klass,
|
|
ObjPtr<ObjectArray<Class>> args);
|
|
template
|
|
ObjPtr<Constructor> Class::GetDeclaredConstructorInternal<PointerSize::k32, true>(
|
|
Thread* self,
|
|
ObjPtr<Class> klass,
|
|
ObjPtr<ObjectArray<Class>> args);
|
|
template
|
|
ObjPtr<Constructor> Class::GetDeclaredConstructorInternal<PointerSize::k64, false>(
|
|
Thread* self,
|
|
ObjPtr<Class> klass,
|
|
ObjPtr<ObjectArray<Class>> args);
|
|
template
|
|
ObjPtr<Constructor> Class::GetDeclaredConstructorInternal<PointerSize::k64, true>(
|
|
Thread* self,
|
|
ObjPtr<Class> klass,
|
|
ObjPtr<ObjectArray<Class>> args);
|
|
|
|
int32_t Class::GetInnerClassFlags(Handle<Class> h_this, int32_t default_value) {
|
|
if (h_this->IsProxyClass() || h_this->GetDexCache() == nullptr) {
|
|
return default_value;
|
|
}
|
|
uint32_t flags;
|
|
if (!annotations::GetInnerClassFlags(h_this, &flags)) {
|
|
return default_value;
|
|
}
|
|
return flags;
|
|
}
|
|
|
|
void Class::SetObjectSizeAllocFastPath(uint32_t new_object_size) {
|
|
if (Runtime::Current()->IsActiveTransaction()) {
|
|
SetField32Volatile<true>(ObjectSizeAllocFastPathOffset(), new_object_size);
|
|
} else {
|
|
SetField32Volatile<false>(ObjectSizeAllocFastPathOffset(), new_object_size);
|
|
}
|
|
}
|
|
|
|
std::string Class::PrettyDescriptor(ObjPtr<mirror::Class> klass) {
|
|
if (klass == nullptr) {
|
|
return "null";
|
|
}
|
|
return klass->PrettyDescriptor();
|
|
}
|
|
|
|
std::string Class::PrettyDescriptor() {
|
|
std::string temp;
|
|
return art::PrettyDescriptor(GetDescriptor(&temp));
|
|
}
|
|
|
|
std::string Class::PrettyClass(ObjPtr<mirror::Class> c) {
|
|
if (c == nullptr) {
|
|
return "null";
|
|
}
|
|
return c->PrettyClass();
|
|
}
|
|
|
|
std::string Class::PrettyClass() {
|
|
std::string result;
|
|
result += "java.lang.Class<";
|
|
result += PrettyDescriptor();
|
|
result += ">";
|
|
return result;
|
|
}
|
|
|
|
std::string Class::PrettyClassAndClassLoader(ObjPtr<mirror::Class> c) {
|
|
if (c == nullptr) {
|
|
return "null";
|
|
}
|
|
return c->PrettyClassAndClassLoader();
|
|
}
|
|
|
|
std::string Class::PrettyClassAndClassLoader() {
|
|
std::string result;
|
|
result += "java.lang.Class<";
|
|
result += PrettyDescriptor();
|
|
result += ",";
|
|
result += mirror::Object::PrettyTypeOf(GetClassLoader());
|
|
// TODO: add an identifying hash value for the loader
|
|
result += ">";
|
|
return result;
|
|
}
|
|
|
|
template<VerifyObjectFlags kVerifyFlags> void Class::GetAccessFlagsDCheck() {
|
|
// Check class is loaded/retired or this is java.lang.String that has a
|
|
// circularity issue during loading the names of its members
|
|
DCHECK(IsIdxLoaded<kVerifyFlags>() || IsRetired<kVerifyFlags>() ||
|
|
IsErroneous<static_cast<VerifyObjectFlags>(kVerifyFlags & ~kVerifyThis)>() ||
|
|
this == String::GetJavaLangString())
|
|
<< "IsIdxLoaded=" << IsIdxLoaded<kVerifyFlags>()
|
|
<< " IsRetired=" << IsRetired<kVerifyFlags>()
|
|
<< " IsErroneous=" <<
|
|
IsErroneous<static_cast<VerifyObjectFlags>(kVerifyFlags & ~kVerifyThis)>()
|
|
<< " IsString=" << (this == String::GetJavaLangString())
|
|
<< " status= " << GetStatus<kVerifyFlags>()
|
|
<< " descriptor=" << PrettyDescriptor();
|
|
}
|
|
// Instantiate the common cases.
|
|
template void Class::GetAccessFlagsDCheck<kVerifyNone>();
|
|
template void Class::GetAccessFlagsDCheck<kVerifyThis>();
|
|
template void Class::GetAccessFlagsDCheck<kVerifyReads>();
|
|
template void Class::GetAccessFlagsDCheck<kVerifyWrites>();
|
|
template void Class::GetAccessFlagsDCheck<kVerifyAll>();
|
|
|
|
} // namespace mirror
|
|
} // namespace art
|