| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "class.h" |
| |
| #include "art_field-inl.h" |
| #include "art_method-inl.h" |
| #include "class_ext.h" |
| #include "class_linker-inl.h" |
| #include "class_loader.h" |
| #include "class-inl.h" |
| #include "dex_cache.h" |
| #include "dex_file-inl.h" |
| #include "dex_file_annotations.h" |
| #include "gc/accounting/card_table-inl.h" |
| #include "handle_scope-inl.h" |
| #include "method.h" |
| #include "object_array-inl.h" |
| #include "object-inl.h" |
| #include "object_lock.h" |
| #include "runtime.h" |
| #include "thread.h" |
| #include "throwable.h" |
| #include "utils.h" |
| #include "well_known_classes.h" |
| |
| namespace art { |
| namespace mirror { |
| |
| GcRoot<Class> Class::java_lang_Class_; |
| |
| void Class::SetClassClass(ObjPtr<Class> java_lang_Class) { |
| CHECK(java_lang_Class_.IsNull()) |
| << java_lang_Class_.Read() |
| << " " << java_lang_Class; |
| CHECK(java_lang_Class != nullptr); |
| java_lang_Class->SetClassFlags(kClassFlagClass); |
| java_lang_Class_ = GcRoot<Class>(java_lang_Class); |
| } |
| |
| void Class::ResetClass() { |
| CHECK(!java_lang_Class_.IsNull()); |
| java_lang_Class_ = GcRoot<Class>(nullptr); |
| } |
| |
| void Class::VisitRoots(RootVisitor* visitor) { |
| java_lang_Class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass)); |
| } |
| |
| ClassExt* Class::GetExtData() { |
| return GetFieldObject<ClassExt>(OFFSET_OF_OBJECT_MEMBER(Class, ext_data_)); |
| } |
| |
| ClassExt* Class::EnsureExtDataPresent(Thread* self) { |
| ObjPtr<ClassExt> existing(GetExtData()); |
| if (!existing.IsNull()) { |
| return existing.Ptr(); |
| } |
| StackHandleScope<3> hs(self); |
| // Handlerize 'this' since we are allocating here. |
| Handle<Class> h_this(hs.NewHandle(this)); |
| // Clear exception so we can allocate. |
| Handle<Throwable> throwable(hs.NewHandle(self->GetException())); |
| self->ClearException(); |
| // Allocate the ClassExt |
| Handle<ClassExt> new_ext(hs.NewHandle(ClassExt::Alloc(self))); |
| if (new_ext.Get() == nullptr) { |
| // OOM allocating the classExt. |
| // TODO Should we restore the suppressed exception? |
| self->AssertPendingOOMException(); |
| return nullptr; |
| } else { |
| MemberOffset ext_offset(OFFSET_OF_OBJECT_MEMBER(Class, ext_data_)); |
| bool set; |
| // Set the ext_data_ field using CAS semantics. |
| if (Runtime::Current()->IsActiveTransaction()) { |
| set = h_this->CasFieldStrongSequentiallyConsistentObject<true>(ext_offset, |
| ObjPtr<ClassExt>(nullptr), |
| new_ext.Get()); |
| } else { |
| set = h_this->CasFieldStrongSequentiallyConsistentObject<false>(ext_offset, |
| ObjPtr<ClassExt>(nullptr), |
| new_ext.Get()); |
| } |
| ObjPtr<ClassExt> ret(set ? new_ext.Get() : h_this->GetExtData()); |
| DCHECK(!set || h_this->GetExtData() == new_ext.Get()); |
| CHECK(!ret.IsNull()); |
| // Restore the exception if there was one. |
| if (throwable.Get() != nullptr) { |
| self->SetException(throwable.Get()); |
| } |
| return ret.Ptr(); |
| } |
| } |
| |
| void Class::SetStatus(Handle<Class> h_this, Status new_status, Thread* self) { |
| Status old_status = h_this->GetStatus(); |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| bool class_linker_initialized = class_linker != nullptr && class_linker->IsInitialized(); |
| if (LIKELY(class_linker_initialized)) { |
| if (UNLIKELY(new_status <= old_status && new_status != kStatusError && |
| new_status != kStatusRetired)) { |
| LOG(FATAL) << "Unexpected change back of class status for " << h_this->PrettyClass() |
| << " " << old_status << " -> " << new_status; |
| } |
| if (new_status >= kStatusResolved || old_status >= kStatusResolved) { |
| // When classes are being resolved the resolution code should hold the lock. |
| CHECK_EQ(h_this->GetLockOwnerThreadId(), self->GetThreadId()) |
| << "Attempt to change status of class while not holding its lock: " |
| << h_this->PrettyClass() << " " << old_status << " -> " << new_status; |
| } |
| } |
| if (UNLIKELY(new_status == kStatusError)) { |
| CHECK_NE(h_this->GetStatus(), kStatusError) |
| << "Attempt to set as erroneous an already erroneous class " |
| << h_this->PrettyClass(); |
| if (VLOG_IS_ON(class_linker)) { |
| LOG(ERROR) << "Setting " << h_this->PrettyDescriptor() << " to erroneous."; |
| if (self->IsExceptionPending()) { |
| LOG(ERROR) << "Exception: " << self->GetException()->Dump(); |
| } |
| } |
| |
| ObjPtr<ClassExt> ext(h_this->EnsureExtDataPresent(self)); |
| if (!ext.IsNull()) { |
| self->AssertPendingException(); |
| ext->SetVerifyError(self->GetException()); |
| } else { |
| self->AssertPendingOOMException(); |
| } |
| self->AssertPendingException(); |
| } |
| |
| static_assert(sizeof(Status) == sizeof(uint32_t), "Size of status not equal to uint32"); |
| if (Runtime::Current()->IsActiveTransaction()) { |
| h_this->SetField32Volatile<true>(StatusOffset(), new_status); |
| } else { |
| h_this->SetField32Volatile<false>(StatusOffset(), new_status); |
| } |
| |
| // Setting the object size alloc fast path needs to be after the status write so that if the |
| // alloc path sees a valid object size, we would know that it's initialized as long as it has a |
| // load-acquire/fake dependency. |
| if (new_status == kStatusInitialized && !h_this->IsVariableSize()) { |
| DCHECK_EQ(h_this->GetObjectSizeAllocFastPath(), std::numeric_limits<uint32_t>::max()); |
| // Finalizable objects must always go slow path. |
| if (!h_this->IsFinalizable()) { |
| h_this->SetObjectSizeAllocFastPath(RoundUp(h_this->GetObjectSize(), kObjectAlignment)); |
| } |
| } |
| |
| if (!class_linker_initialized) { |
| // When the class linker is being initialized its single threaded and by definition there can be |
| // no waiters. During initialization classes may appear temporary but won't be retired as their |
| // size was statically computed. |
| } else { |
| // Classes that are being resolved or initialized need to notify waiters that the class status |
| // changed. See ClassLinker::EnsureResolved and ClassLinker::WaitForInitializeClass. |
| if (h_this->IsTemp()) { |
| // Class is a temporary one, ensure that waiters for resolution get notified of retirement |
| // so that they can grab the new version of the class from the class linker's table. |
| CHECK_LT(new_status, kStatusResolved) << h_this->PrettyDescriptor(); |
| if (new_status == kStatusRetired || new_status == kStatusError) { |
| h_this->NotifyAll(self); |
| } |
| } else { |
| CHECK_NE(new_status, kStatusRetired); |
| if (old_status >= kStatusResolved || new_status >= kStatusResolved) { |
| h_this->NotifyAll(self); |
| } |
| } |
| } |
| } |
| |
| void Class::SetDexCache(ObjPtr<DexCache> new_dex_cache) { |
| SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Class, dex_cache_), new_dex_cache); |
| SetDexCacheStrings(new_dex_cache != nullptr ? new_dex_cache->GetStrings() : nullptr); |
| } |
| |
| void Class::SetClassSize(uint32_t new_class_size) { |
| if (kIsDebugBuild && new_class_size < GetClassSize()) { |
| DumpClass(LOG_STREAM(FATAL_WITHOUT_ABORT), kDumpClassFullDetail); |
| LOG(FATAL_WITHOUT_ABORT) << new_class_size << " vs " << GetClassSize(); |
| LOG(FATAL) << "class=" << PrettyTypeOf(); |
| } |
| // Not called within a transaction. |
| SetField32<false>(OFFSET_OF_OBJECT_MEMBER(Class, class_size_), new_class_size); |
| } |
| |
| // Return the class' name. The exact format is bizarre, but it's the specified behavior for |
| // Class.getName: keywords for primitive types, regular "[I" form for primitive arrays (so "int" |
| // but "[I"), and arrays of reference types written between "L" and ";" but with dots rather than |
| // slashes (so "java.lang.String" but "[Ljava.lang.String;"). Madness. |
| String* Class::ComputeName(Handle<Class> h_this) { |
| String* name = h_this->GetName(); |
| if (name != nullptr) { |
| return name; |
| } |
| std::string temp; |
| const char* descriptor = h_this->GetDescriptor(&temp); |
| Thread* self = Thread::Current(); |
| if ((descriptor[0] != 'L') && (descriptor[0] != '[')) { |
| // The descriptor indicates that this is the class for |
| // a primitive type; special-case the return value. |
| const char* c_name = nullptr; |
| switch (descriptor[0]) { |
| case 'Z': c_name = "boolean"; break; |
| case 'B': c_name = "byte"; break; |
| case 'C': c_name = "char"; break; |
| case 'S': c_name = "short"; break; |
| case 'I': c_name = "int"; break; |
| case 'J': c_name = "long"; break; |
| case 'F': c_name = "float"; break; |
| case 'D': c_name = "double"; break; |
| case 'V': c_name = "void"; break; |
| default: |
| LOG(FATAL) << "Unknown primitive type: " << PrintableChar(descriptor[0]); |
| } |
| name = String::AllocFromModifiedUtf8(self, c_name); |
| } else { |
| // Convert the UTF-8 name to a java.lang.String. The name must use '.' to separate package |
| // components. |
| name = String::AllocFromModifiedUtf8(self, DescriptorToDot(descriptor).c_str()); |
| } |
| h_this->SetName(name); |
| return name; |
| } |
| |
| void Class::DumpClass(std::ostream& os, int flags) { |
| if ((flags & kDumpClassFullDetail) == 0) { |
| os << PrettyClass(); |
| if ((flags & kDumpClassClassLoader) != 0) { |
| os << ' ' << GetClassLoader(); |
| } |
| if ((flags & kDumpClassInitialized) != 0) { |
| os << ' ' << GetStatus(); |
| } |
| os << "\n"; |
| return; |
| } |
| |
| Thread* const self = Thread::Current(); |
| StackHandleScope<2> hs(self); |
| Handle<Class> h_this(hs.NewHandle(this)); |
| Handle<Class> h_super(hs.NewHandle(GetSuperClass())); |
| auto image_pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); |
| |
| std::string temp; |
| os << "----- " << (IsInterface() ? "interface" : "class") << " " |
| << "'" << GetDescriptor(&temp) << "' cl=" << GetClassLoader() << " -----\n", |
| os << " objectSize=" << SizeOf() << " " |
| << "(" << (h_super.Get() != nullptr ? h_super->SizeOf() : -1) << " from super)\n", |
| os << StringPrintf(" access=0x%04x.%04x\n", |
| GetAccessFlags() >> 16, GetAccessFlags() & kAccJavaFlagsMask); |
| if (h_super.Get() != nullptr) { |
| os << " super='" << h_super->PrettyClass() << "' (cl=" << h_super->GetClassLoader() |
| << ")\n"; |
| } |
| if (IsArrayClass()) { |
| os << " componentType=" << PrettyClass(GetComponentType()) << "\n"; |
| } |
| const size_t num_direct_interfaces = NumDirectInterfaces(); |
| if (num_direct_interfaces > 0) { |
| os << " interfaces (" << num_direct_interfaces << "):\n"; |
| for (size_t i = 0; i < num_direct_interfaces; ++i) { |
| ObjPtr<Class> interface = GetDirectInterface(self, h_this.Get(), i); |
| if (interface == nullptr) { |
| os << StringPrintf(" %2zd: nullptr!\n", i); |
| } else { |
| ObjPtr<ClassLoader> cl = interface->GetClassLoader(); |
| os << StringPrintf(" %2zd: %s (cl=%p)\n", i, PrettyClass(interface).c_str(), cl.Ptr()); |
| } |
| } |
| } |
| if (!IsLoaded()) { |
| os << " class not yet loaded"; |
| } else { |
| // After this point, this may have moved due to GetDirectInterface. |
| os << " vtable (" << h_this->NumVirtualMethods() << " entries, " |
| << (h_super.Get() != nullptr ? h_super->NumVirtualMethods() : 0) << " in super):\n"; |
| for (size_t i = 0; i < NumVirtualMethods(); ++i) { |
| os << StringPrintf(" %2zd: %s\n", i, ArtMethod::PrettyMethod( |
| h_this->GetVirtualMethodDuringLinking(i, image_pointer_size)).c_str()); |
| } |
| os << " direct methods (" << h_this->NumDirectMethods() << " entries):\n"; |
| for (size_t i = 0; i < h_this->NumDirectMethods(); ++i) { |
| os << StringPrintf(" %2zd: %s\n", i, ArtMethod::PrettyMethod( |
| h_this->GetDirectMethod(i, image_pointer_size)).c_str()); |
| } |
| if (h_this->NumStaticFields() > 0) { |
| os << " static fields (" << h_this->NumStaticFields() << " entries):\n"; |
| if (h_this->IsResolved() || h_this->IsErroneous()) { |
| for (size_t i = 0; i < h_this->NumStaticFields(); ++i) { |
| os << StringPrintf(" %2zd: %s\n", i, |
| ArtField::PrettyField(h_this->GetStaticField(i)).c_str()); |
| } |
| } else { |
| os << " <not yet available>"; |
| } |
| } |
| if (h_this->NumInstanceFields() > 0) { |
| os << " instance fields (" << h_this->NumInstanceFields() << " entries):\n"; |
| if (h_this->IsResolved() || h_this->IsErroneous()) { |
| for (size_t i = 0; i < h_this->NumInstanceFields(); ++i) { |
| os << StringPrintf(" %2zd: %s\n", i, |
| ArtField::PrettyField(h_this->GetInstanceField(i)).c_str()); |
| } |
| } else { |
| os << " <not yet available>"; |
| } |
| } |
| } |
| } |
| |
| void Class::SetReferenceInstanceOffsets(uint32_t new_reference_offsets) { |
| if (kIsDebugBuild && new_reference_offsets != kClassWalkSuper) { |
| // Sanity check that the number of bits set in the reference offset bitmap |
| // agrees with the number of references |
| uint32_t count = 0; |
| for (ObjPtr<Class> c = this; c != nullptr; c = c->GetSuperClass()) { |
| count += c->NumReferenceInstanceFieldsDuringLinking(); |
| } |
| // +1 for the Class in Object. |
| CHECK_EQ(static_cast<uint32_t>(POPCOUNT(new_reference_offsets)) + 1, count); |
| } |
| // Not called within a transaction. |
| SetField32<false>(OFFSET_OF_OBJECT_MEMBER(Class, reference_instance_offsets_), |
| new_reference_offsets); |
| } |
| |
| bool Class::IsInSamePackage(const StringPiece& descriptor1, const StringPiece& descriptor2) { |
| size_t i = 0; |
| size_t min_length = std::min(descriptor1.size(), descriptor2.size()); |
| while (i < min_length && descriptor1[i] == descriptor2[i]) { |
| ++i; |
| } |
| if (descriptor1.find('/', i) != StringPiece::npos || |
| descriptor2.find('/', i) != StringPiece::npos) { |
| return false; |
| } else { |
| return true; |
| } |
| } |
| |
| bool Class::IsInSamePackage(ObjPtr<Class> that) { |
| ObjPtr<Class> klass1 = this; |
| ObjPtr<Class> klass2 = that; |
| if (klass1 == klass2) { |
| return true; |
| } |
| // Class loaders must match. |
| if (klass1->GetClassLoader() != klass2->GetClassLoader()) { |
| return false; |
| } |
| // Arrays are in the same package when their element classes are. |
| while (klass1->IsArrayClass()) { |
| klass1 = klass1->GetComponentType(); |
| } |
| while (klass2->IsArrayClass()) { |
| klass2 = klass2->GetComponentType(); |
| } |
| // trivial check again for array types |
| if (klass1 == klass2) { |
| return true; |
| } |
| // Compare the package part of the descriptor string. |
| std::string temp1, temp2; |
| return IsInSamePackage(klass1->GetDescriptor(&temp1), klass2->GetDescriptor(&temp2)); |
| } |
| |
| bool Class::IsThrowableClass() { |
| return WellKnownClasses::ToClass(WellKnownClasses::java_lang_Throwable)->IsAssignableFrom(this); |
| } |
| |
| void Class::SetClassLoader(ObjPtr<ClassLoader> new_class_loader) { |
| if (Runtime::Current()->IsActiveTransaction()) { |
| SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(Class, class_loader_), new_class_loader); |
| } else { |
| SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Class, class_loader_), new_class_loader); |
| } |
| } |
| |
| ArtMethod* Class::FindInterfaceMethod(const StringPiece& name, |
| const StringPiece& signature, |
| PointerSize pointer_size) { |
| // Check the current class before checking the interfaces. |
| ArtMethod* method = FindDeclaredVirtualMethod(name, signature, pointer_size); |
| if (method != nullptr) { |
| return method; |
| } |
| |
| int32_t iftable_count = GetIfTableCount(); |
| ObjPtr<IfTable> iftable = GetIfTable(); |
| for (int32_t i = 0; i < iftable_count; ++i) { |
| method = iftable->GetInterface(i)->FindDeclaredVirtualMethod(name, signature, pointer_size); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindInterfaceMethod(const StringPiece& name, |
| const Signature& signature, |
| PointerSize pointer_size) { |
| // Check the current class before checking the interfaces. |
| ArtMethod* method = FindDeclaredVirtualMethod(name, signature, pointer_size); |
| if (method != nullptr) { |
| return method; |
| } |
| |
| int32_t iftable_count = GetIfTableCount(); |
| ObjPtr<IfTable> iftable = GetIfTable(); |
| for (int32_t i = 0; i < iftable_count; ++i) { |
| method = iftable->GetInterface(i)->FindDeclaredVirtualMethod(name, signature, pointer_size); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindInterfaceMethod(ObjPtr<DexCache> dex_cache, |
| uint32_t dex_method_idx, |
| PointerSize pointer_size) { |
| // Check the current class before checking the interfaces. |
| ArtMethod* method = FindDeclaredVirtualMethod(dex_cache, dex_method_idx, pointer_size); |
| if (method != nullptr) { |
| return method; |
| } |
| |
| int32_t iftable_count = GetIfTableCount(); |
| ObjPtr<IfTable> iftable = GetIfTable(); |
| for (int32_t i = 0; i < iftable_count; ++i) { |
| method = iftable->GetInterface(i)->FindDeclaredVirtualMethod( |
| dex_cache, dex_method_idx, pointer_size); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDeclaredDirectMethod(const StringPiece& name, |
| const StringPiece& signature, |
| PointerSize pointer_size) { |
| for (auto& method : GetDirectMethods(pointer_size)) { |
| if (name == method.GetName() && method.GetSignature() == signature) { |
| return &method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDeclaredDirectMethod(const StringPiece& name, |
| const Signature& signature, |
| PointerSize pointer_size) { |
| for (auto& method : GetDirectMethods(pointer_size)) { |
| if (name == method.GetName() && signature == method.GetSignature()) { |
| return &method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDeclaredDirectMethod(ObjPtr<DexCache> dex_cache, |
| uint32_t dex_method_idx, |
| PointerSize pointer_size) { |
| if (GetDexCache() == dex_cache) { |
| for (auto& method : GetDirectMethods(pointer_size)) { |
| if (method.GetDexMethodIndex() == dex_method_idx) { |
| return &method; |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDirectMethod(const StringPiece& name, |
| const StringPiece& signature, |
| PointerSize pointer_size) { |
| for (ObjPtr<Class> klass = this; klass != nullptr; klass = klass->GetSuperClass()) { |
| ArtMethod* method = klass->FindDeclaredDirectMethod(name, signature, pointer_size); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDirectMethod(const StringPiece& name, |
| const Signature& signature, |
| PointerSize pointer_size) { |
| for (ObjPtr<Class> klass = this; klass != nullptr; klass = klass->GetSuperClass()) { |
| ArtMethod* method = klass->FindDeclaredDirectMethod(name, signature, pointer_size); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDirectMethod(ObjPtr<DexCache> dex_cache, |
| uint32_t dex_method_idx, |
| PointerSize pointer_size) { |
| for (ObjPtr<Class> klass = this; klass != nullptr; klass = klass->GetSuperClass()) { |
| ArtMethod* method = klass->FindDeclaredDirectMethod(dex_cache, dex_method_idx, pointer_size); |
| if (method != nullptr) { |
| 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; |
| } |
| |
| // TODO These should maybe be changed to be named FindOwnedVirtualMethod or something similar |
| // because they do not only find 'declared' methods and will return copied methods. This behavior is |
| // desired and correct but the naming can lead to confusion because in the java language declared |
| // excludes interface methods which might be found by this. |
| ArtMethod* Class::FindDeclaredVirtualMethod(const StringPiece& name, |
| const StringPiece& signature, |
| PointerSize pointer_size) { |
| for (auto& method : GetVirtualMethods(pointer_size)) { |
| ArtMethod* const np_method = method.GetInterfaceMethodIfProxy(pointer_size); |
| if (name == np_method->GetName() && np_method->GetSignature() == signature) { |
| return &method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDeclaredVirtualMethod(const StringPiece& name, |
| const Signature& signature, |
| PointerSize pointer_size) { |
| for (auto& method : GetVirtualMethods(pointer_size)) { |
| ArtMethod* const np_method = method.GetInterfaceMethodIfProxy(pointer_size); |
| if (name == np_method->GetName() && signature == np_method->GetSignature()) { |
| return &method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDeclaredVirtualMethod(ObjPtr<DexCache> dex_cache, |
| uint32_t dex_method_idx, |
| PointerSize pointer_size) { |
| if (GetDexCache() == dex_cache) { |
| for (auto& method : GetDeclaredVirtualMethods(pointer_size)) { |
| if (method.GetDexMethodIndex() == dex_method_idx) { |
| 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::FindVirtualMethod(const StringPiece& name, |
| const StringPiece& signature, |
| PointerSize pointer_size) { |
| for (ObjPtr<Class> klass = this; klass != nullptr; klass = klass->GetSuperClass()) { |
| ArtMethod* method = klass->FindDeclaredVirtualMethod(name, signature, pointer_size); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindVirtualMethod(const StringPiece& name, |
| const Signature& signature, |
| PointerSize pointer_size) { |
| for (ObjPtr<Class> klass = this; klass != nullptr; klass = klass->GetSuperClass()) { |
| ArtMethod* method = klass->FindDeclaredVirtualMethod(name, signature, pointer_size); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindVirtualMethod(ObjPtr<DexCache> dex_cache, |
| uint32_t dex_method_idx, |
| PointerSize pointer_size) { |
| for (ObjPtr<Class> klass = this; klass != nullptr; klass = klass->GetSuperClass()) { |
| ArtMethod* method = klass->FindDeclaredVirtualMethod(dex_cache, dex_method_idx, pointer_size); |
| if (method != nullptr) { |
| 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->GetInterfaces(); |
| DCHECK(interfaces != nullptr); |
| return interfaces->Get(idx); |
| } else { |
| dex::TypeIndex type_idx = klass->GetDirectInterfaceTypeIdx(idx); |
| ObjPtr<Class> interface = klass->GetDexCache()->GetResolvedType(type_idx); |
| 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.Get() != 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(DexFile::kDexNoIndex) |
| : 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.Get() == 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; |
| } |
| |
| } // namespace mirror |
| } // namespace art |