| /* |
| * 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_linker.h" |
| #include "class_loader.h" |
| #include "class-inl.h" |
| #include "dex_cache.h" |
| #include "dex_file-inl.h" |
| #include "gc/accounting/card_table-inl.h" |
| #include "handle_scope-inl.h" |
| #include "object_array-inl.h" |
| #include "object-inl.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(Class* java_lang_Class) { |
| CHECK(java_lang_Class_.IsNull()) |
| << java_lang_Class_.Read() |
| << " " << java_lang_Class; |
| CHECK(java_lang_Class != nullptr); |
| 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(RootCallback* callback, void* arg) { |
| if (!java_lang_Class_.IsNull()) { |
| java_lang_Class_.VisitRoot(callback, arg, 0, kRootStickyClass); |
| } |
| } |
| |
| void Class::SetStatus(Status new_status, Thread* self) { |
| Status old_status = 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 " << PrettyClass(this) << " " |
| << 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(GetLockOwnerThreadId(), self->GetThreadId()) |
| << "Attempt to change status of class while not holding its lock: " |
| << PrettyClass(this) << " " << old_status << " -> " << new_status; |
| } |
| } |
| if (UNLIKELY(new_status == kStatusError)) { |
| CHECK_NE(GetStatus(), kStatusError) |
| << "Attempt to set as erroneous an already erroneous class " << PrettyClass(this); |
| |
| // Stash current exception. |
| StackHandleScope<3> hs(self); |
| ThrowLocation old_throw_location; |
| Handle<mirror::Throwable> old_exception(hs.NewHandle(self->GetException(&old_throw_location))); |
| CHECK(old_exception.Get() != nullptr); |
| Handle<mirror::Object> old_throw_this_object(hs.NewHandle(old_throw_location.GetThis())); |
| Handle<mirror::ArtMethod> old_throw_method(hs.NewHandle(old_throw_location.GetMethod())); |
| uint32_t old_throw_dex_pc = old_throw_location.GetDexPc(); |
| bool is_exception_reported = self->IsExceptionReportedToInstrumentation(); |
| Class* eiie_class; |
| // Do't attempt to use FindClass if we have an OOM error since this can try to do more |
| // allocations and may cause infinite loops. |
| bool throw_eiie = (old_exception.Get() == nullptr); |
| if (!throw_eiie) { |
| std::string temp; |
| const char* old_exception_descriptor = old_exception->GetClass()->GetDescriptor(&temp); |
| throw_eiie = (strcmp(old_exception_descriptor, "Ljava/lang/OutOfMemoryError;") != 0); |
| } |
| if (throw_eiie) { |
| // Clear exception to call FindSystemClass. |
| self->ClearException(); |
| eiie_class = Runtime::Current()->GetClassLinker()->FindSystemClass( |
| self, "Ljava/lang/ExceptionInInitializerError;"); |
| CHECK(!self->IsExceptionPending()); |
| // Only verification errors, not initialization problems, should set a verify error. |
| // This is to ensure that ThrowEarlierClassFailure will throw NoClassDefFoundError in that |
| // case. |
| Class* exception_class = old_exception->GetClass(); |
| if (!eiie_class->IsAssignableFrom(exception_class)) { |
| SetVerifyErrorClass(exception_class); |
| } |
| } |
| |
| // Restore exception. |
| ThrowLocation gc_safe_throw_location(old_throw_this_object.Get(), old_throw_method.Get(), |
| old_throw_dex_pc); |
| self->SetException(gc_safe_throw_location, old_exception.Get()); |
| self->SetExceptionReportedToInstrumentation(is_exception_reported); |
| } |
| COMPILE_ASSERT(sizeof(Status) == sizeof(uint32_t), size_of_status_not_uint32); |
| if (Runtime::Current()->IsActiveTransaction()) { |
| SetField32Volatile<true>(OFFSET_OF_OBJECT_MEMBER(Class, status_), new_status); |
| } else { |
| SetField32Volatile<false>(OFFSET_OF_OBJECT_MEMBER(Class, status_), new_status); |
| } |
| |
| 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 (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) << PrettyDescriptor(this); |
| if (new_status == kStatusRetired || new_status == kStatusError) { |
| NotifyAll(self); |
| } |
| } else { |
| CHECK_NE(new_status, kStatusRetired); |
| if (old_status >= kStatusResolved || new_status >= kStatusResolved) { |
| NotifyAll(self); |
| } |
| } |
| } |
| } |
| |
| void Class::SetDexCache(DexCache* new_dex_cache) { |
| SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Class, dex_cache_), new_dex_cache); |
| } |
| |
| void Class::SetClassSize(uint32_t new_class_size) { |
| if (kIsDebugBuild && (new_class_size < GetClassSize())) { |
| DumpClass(LOG(ERROR), kDumpClassFullDetail); |
| CHECK_GE(new_class_size, GetClassSize()) << " class=" << PrettyTypeOf(this); |
| } |
| // 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(this); |
| if ((flags & kDumpClassClassLoader) != 0) { |
| os << ' ' << GetClassLoader(); |
| } |
| if ((flags & kDumpClassInitialized) != 0) { |
| os << ' ' << GetStatus(); |
| } |
| os << "\n"; |
| return; |
| } |
| |
| Thread* self = Thread::Current(); |
| StackHandleScope<2> hs(self); |
| Handle<mirror::Class> h_this(hs.NewHandle(this)); |
| Handle<mirror::Class> h_super(hs.NewHandle(GetSuperClass())); |
| |
| 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='" << PrettyClass(h_super.Get()) << "' (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) { |
| Class* interface = GetDirectInterface(self, h_this, i); |
| const ClassLoader* cl = interface->GetClassLoader(); |
| os << StringPrintf(" %2zd: %s (cl=%p)\n", i, PrettyClass(interface).c_str(), cl); |
| } |
| } |
| 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, |
| PrettyMethod(h_this->GetVirtualMethodDuringLinking(i)).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, PrettyMethod(h_this->GetDirectMethod(i)).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, 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, PrettyField(h_this->GetInstanceField(i)).c_str()); |
| } |
| } else { |
| os << " <not yet available>"; |
| } |
| } |
| } |
| } |
| |
| void Class::SetReferenceInstanceOffsets(uint32_t new_reference_offsets) { |
| if (new_reference_offsets != CLASS_WALK_SUPER) { |
| // Sanity check that the number of bits set in the reference offset bitmap |
| // agrees with the number of references |
| size_t count = 0; |
| for (Class* c = this; c != nullptr; c = c->GetSuperClass()) { |
| count += c->NumReferenceInstanceFieldsDuringLinking(); |
| } |
| CHECK_EQ((size_t)POPCOUNT(new_reference_offsets), 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(Class* that) { |
| Class* klass1 = this; |
| 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::IsStringClass() const { |
| return this == String::GetJavaLangString(); |
| } |
| |
| bool Class::IsThrowableClass() { |
| return WellKnownClasses::ToClass(WellKnownClasses::java_lang_Throwable)->IsAssignableFrom(this); |
| } |
| |
| void Class::SetClassLoader(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) { |
| // Check the current class before checking the interfaces. |
| ArtMethod* method = FindDeclaredVirtualMethod(name, signature); |
| if (method != nullptr) { |
| return method; |
| } |
| |
| int32_t iftable_count = GetIfTableCount(); |
| IfTable* iftable = GetIfTable(); |
| for (int32_t i = 0; i < iftable_count; ++i) { |
| method = iftable->GetInterface(i)->FindDeclaredVirtualMethod(name, signature); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindInterfaceMethod(const StringPiece& name, const Signature& signature) { |
| // Check the current class before checking the interfaces. |
| ArtMethod* method = FindDeclaredVirtualMethod(name, signature); |
| if (method != nullptr) { |
| return method; |
| } |
| |
| int32_t iftable_count = GetIfTableCount(); |
| IfTable* iftable = GetIfTable(); |
| for (int32_t i = 0; i < iftable_count; ++i) { |
| method = iftable->GetInterface(i)->FindDeclaredVirtualMethod(name, signature); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindInterfaceMethod(const DexCache* dex_cache, uint32_t dex_method_idx) { |
| // Check the current class before checking the interfaces. |
| ArtMethod* method = FindDeclaredVirtualMethod(dex_cache, dex_method_idx); |
| if (method != nullptr) { |
| return method; |
| } |
| |
| int32_t iftable_count = GetIfTableCount(); |
| IfTable* iftable = GetIfTable(); |
| for (int32_t i = 0; i < iftable_count; ++i) { |
| method = iftable->GetInterface(i)->FindDeclaredVirtualMethod(dex_cache, dex_method_idx); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDeclaredDirectMethod(const StringPiece& name, const StringPiece& signature) { |
| for (size_t i = 0; i < NumDirectMethods(); ++i) { |
| ArtMethod* method = GetDirectMethod(i); |
| if (name == method->GetName() && method->GetSignature() == signature) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDeclaredDirectMethod(const StringPiece& name, const Signature& signature) { |
| for (size_t i = 0; i < NumDirectMethods(); ++i) { |
| ArtMethod* method = GetDirectMethod(i); |
| if (name == method->GetName() && signature == method->GetSignature()) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDeclaredDirectMethod(const DexCache* dex_cache, uint32_t dex_method_idx) { |
| if (GetDexCache() == dex_cache) { |
| for (size_t i = 0; i < NumDirectMethods(); ++i) { |
| ArtMethod* method = GetDirectMethod(i); |
| if (method->GetDexMethodIndex() == dex_method_idx) { |
| return method; |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDirectMethod(const StringPiece& name, const StringPiece& signature) { |
| for (Class* klass = this; klass != nullptr; klass = klass->GetSuperClass()) { |
| ArtMethod* method = klass->FindDeclaredDirectMethod(name, signature); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDirectMethod(const StringPiece& name, const Signature& signature) { |
| for (Class* klass = this; klass != nullptr; klass = klass->GetSuperClass()) { |
| ArtMethod* method = klass->FindDeclaredDirectMethod(name, signature); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDirectMethod(const DexCache* dex_cache, uint32_t dex_method_idx) { |
| for (Class* klass = this; klass != nullptr; klass = klass->GetSuperClass()) { |
| ArtMethod* method = klass->FindDeclaredDirectMethod(dex_cache, dex_method_idx); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDeclaredVirtualMethod(const StringPiece& name, const StringPiece& signature) { |
| for (size_t i = 0; i < NumVirtualMethods(); ++i) { |
| ArtMethod* method = GetVirtualMethod(i); |
| if (name == method->GetName() && method->GetSignature() == signature) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDeclaredVirtualMethod(const StringPiece& name, const Signature& signature) { |
| for (size_t i = 0; i < NumVirtualMethods(); ++i) { |
| ArtMethod* method = GetVirtualMethod(i); |
| if (name == method->GetName() && signature == method->GetSignature()) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindDeclaredVirtualMethod(const DexCache* dex_cache, uint32_t dex_method_idx) { |
| if (GetDexCache() == dex_cache) { |
| for (size_t i = 0; i < NumVirtualMethods(); ++i) { |
| ArtMethod* method = GetVirtualMethod(i); |
| if (method->GetDexMethodIndex() == dex_method_idx) { |
| return method; |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindVirtualMethod(const StringPiece& name, const StringPiece& signature) { |
| for (Class* klass = this; klass != nullptr; klass = klass->GetSuperClass()) { |
| ArtMethod* method = klass->FindDeclaredVirtualMethod(name, signature); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindVirtualMethod(const StringPiece& name, const Signature& signature) { |
| for (Class* klass = this; klass != nullptr; klass = klass->GetSuperClass()) { |
| ArtMethod* method = klass->FindDeclaredVirtualMethod(name, signature); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindVirtualMethod(const DexCache* dex_cache, uint32_t dex_method_idx) { |
| for (Class* klass = this; klass != nullptr; klass = klass->GetSuperClass()) { |
| ArtMethod* method = klass->FindDeclaredVirtualMethod(dex_cache, dex_method_idx); |
| if (method != nullptr) { |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtMethod* Class::FindClassInitializer() { |
| for (size_t i = 0; i < NumDirectMethods(); ++i) { |
| ArtMethod* method = GetDirectMethod(i); |
| if (method->IsClassInitializer()) { |
| DCHECK_STREQ(method->GetName(), "<clinit>"); |
| DCHECK_STREQ(method->GetSignature().ToString().c_str(), "()V"); |
| return method; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtField* Class::FindDeclaredInstanceField(const StringPiece& name, const StringPiece& type) { |
| // Is the field in this class? |
| // Interfaces are not relevant because they can't contain instance fields. |
| for (size_t i = 0; i < NumInstanceFields(); ++i) { |
| ArtField* f = GetInstanceField(i); |
| if (name == f->GetName() && type == f->GetTypeDescriptor()) { |
| return f; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtField* Class::FindDeclaredInstanceField(const DexCache* dex_cache, uint32_t dex_field_idx) { |
| if (GetDexCache() == dex_cache) { |
| for (size_t i = 0; i < NumInstanceFields(); ++i) { |
| ArtField* f = GetInstanceField(i); |
| if (f->GetDexFieldIndex() == dex_field_idx) { |
| return f; |
| } |
| } |
| } |
| 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 (Class* c = this; c != nullptr; c = c->GetSuperClass()) { |
| ArtField* f = c->FindDeclaredInstanceField(name, type); |
| if (f != nullptr) { |
| return f; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtField* Class::FindInstanceField(const 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 (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); |
| for (size_t i = 0; i < NumStaticFields(); ++i) { |
| ArtField* f = GetStaticField(i); |
| if (name == f->GetName() && type == f->GetTypeDescriptor()) { |
| return f; |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtField* Class::FindDeclaredStaticField(const DexCache* dex_cache, uint32_t dex_field_idx) { |
| if (dex_cache == GetDexCache()) { |
| for (size_t i = 0; i < NumStaticFields(); ++i) { |
| ArtField* f = GetStaticField(i); |
| if (f->GetDexFieldIndex() == dex_field_idx) { |
| return f; |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtField* Class::FindStaticField(Thread* self, Handle<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 (Class* k = klass.Get(); k != nullptr; k = k->GetSuperClass()) { |
| // Is the field in this class? |
| ArtField* f = k->FindDeclaredStaticField(name, type); |
| if (f != nullptr) { |
| return f; |
| } |
| // Wrap k incase it moves during GetDirectInterface. |
| StackHandleScope<1> hs(self); |
| HandleWrapper<mirror::Class> h_k(hs.NewHandleWrapper(&k)); |
| // Is this field in any of this class' interfaces? |
| for (uint32_t i = 0; i < h_k->NumDirectInterfaces(); ++i) { |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> interface(hs.NewHandle(GetDirectInterface(self, h_k, i))); |
| f = FindStaticField(self, interface, name, type); |
| if (f != nullptr) { |
| return f; |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtField* Class::FindStaticField(Thread* self, Handle<Class> klass, const DexCache* dex_cache, |
| uint32_t dex_field_idx) { |
| for (Class* k = klass.Get(); 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; |
| } |
| // Wrap k incase it moves during GetDirectInterface. |
| StackHandleScope<1> hs(self); |
| HandleWrapper<mirror::Class> h_k(hs.NewHandleWrapper(&k)); |
| // Is this field in any of this class' interfaces? |
| for (uint32_t i = 0; i < h_k->NumDirectInterfaces(); ++i) { |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> interface(hs.NewHandle(GetDirectInterface(self, h_k, i))); |
| f = FindStaticField(self, interface, dex_cache, dex_field_idx); |
| if (f != nullptr) { |
| return f; |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| ArtField* Class::FindField(Thread* self, Handle<Class> klass, const StringPiece& name, |
| const StringPiece& type) { |
| // Find a field using the JLS field resolution order |
| for (Class* k = klass.Get(); 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? |
| StackHandleScope<1> hs(self); |
| HandleWrapper<mirror::Class> h_k(hs.NewHandleWrapper(&k)); |
| for (uint32_t i = 0; i < h_k->NumDirectInterfaces(); ++i) { |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> interface(hs.NewHandle(GetDirectInterface(self, h_k, i))); |
| f = interface->FindStaticField(self, interface, name, type); |
| if (f != nullptr) { |
| return f; |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| static void SetPreverifiedFlagOnMethods(mirror::ObjectArray<mirror::ArtMethod>* methods) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| if (methods != nullptr) { |
| for (int32_t index = 0, end = methods->GetLength(); index < end; ++index) { |
| mirror::ArtMethod* method = methods->GetWithoutChecks(index); |
| DCHECK(method != nullptr); |
| if (!method->IsNative() && !method->IsAbstract()) { |
| method->SetPreverified(); |
| } |
| } |
| } |
| } |
| |
| void Class::SetPreverifiedFlagOnAllMethods() { |
| DCHECK(IsVerified()); |
| SetPreverifiedFlagOnMethods(GetDirectMethods()); |
| SetPreverifiedFlagOnMethods(GetVirtualMethods()); |
| } |
| |
| 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); |
| } |
| |
| uint32_t Class::NumDirectInterfaces() { |
| if (IsPrimitive()) { |
| return 0; |
| } else if (IsArrayClass()) { |
| return 2; |
| } else if (IsProxyClass()) { |
| mirror::ObjectArray<mirror::Class>* interfaces = GetInterfaces(); |
| return interfaces != nullptr ? interfaces->GetLength() : 0; |
| } else { |
| const DexFile::TypeList* interfaces = GetInterfaceTypeList(); |
| if (interfaces == nullptr) { |
| return 0; |
| } else { |
| return interfaces->Size(); |
| } |
| } |
| } |
| |
| uint16_t Class::GetDirectInterfaceTypeIdx(uint32_t idx) { |
| DCHECK(!IsPrimitive()); |
| DCHECK(!IsArrayClass()); |
| return GetInterfaceTypeList()->GetTypeItem(idx).type_idx_; |
| } |
| |
| mirror::Class* Class::GetDirectInterface(Thread* self, Handle<mirror::Class> klass, |
| uint32_t idx) { |
| DCHECK(klass.Get() != nullptr); |
| DCHECK(!klass->IsPrimitive()); |
| if (klass->IsArrayClass()) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| if (idx == 0) { |
| return class_linker->FindSystemClass(self, "Ljava/lang/Cloneable;"); |
| } else { |
| DCHECK_EQ(1U, idx); |
| return class_linker->FindSystemClass(self, "Ljava/io/Serializable;"); |
| } |
| } else if (klass->IsProxyClass()) { |
| mirror::ObjectArray<mirror::Class>* interfaces = klass.Get()->GetInterfaces(); |
| DCHECK(interfaces != nullptr); |
| return interfaces->Get(idx); |
| } else { |
| uint16_t type_idx = klass->GetDirectInterfaceTypeIdx(idx); |
| mirror::Class* interface = klass->GetDexCache()->GetResolvedType(type_idx); |
| if (interface == nullptr) { |
| interface = Runtime::Current()->GetClassLinker()->ResolveType(klass->GetDexFile(), type_idx, |
| klass.Get()); |
| CHECK(interface != nullptr || self->IsExceptionPending()); |
| } |
| return interface; |
| } |
| } |
| |
| 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() { |
| mirror::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::PopulateEmbeddedImtAndVTable() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| ObjectArray<ArtMethod>* table = GetImTable(); |
| if (table != nullptr) { |
| for (uint32_t i = 0; i < kImtSize; i++) { |
| SetEmbeddedImTableEntry(i, table->Get(i)); |
| } |
| } |
| |
| table = GetVTableDuringLinking(); |
| CHECK(table != nullptr) << PrettyClass(this); |
| SetEmbeddedVTableLength(table->GetLength()); |
| for (int32_t i = 0; i < table->GetLength(); i++) { |
| SetEmbeddedVTableEntry(i, table->Get(i)); |
| } |
| |
| SetImTable(nullptr); |
| // 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); |
| } |
| } |
| |
| // The pre-fence visitor for Class::CopyOf(). |
| class CopyClassVisitor { |
| public: |
| explicit CopyClassVisitor(Thread* self, Handle<mirror::Class>* orig, |
| size_t new_length, size_t copy_bytes) |
| : self_(self), orig_(orig), new_length_(new_length), |
| copy_bytes_(copy_bytes) { |
| } |
| |
| void operator()(Object* obj, size_t usable_size) const |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| UNUSED(usable_size); |
| mirror::Class* new_class_obj = obj->AsClass(); |
| mirror::Object::CopyObject(self_, new_class_obj, orig_->Get(), copy_bytes_); |
| new_class_obj->SetStatus(Class::kStatusResolving, self_); |
| new_class_obj->PopulateEmbeddedImtAndVTable(); |
| new_class_obj->SetClassSize(new_length_); |
| } |
| |
| private: |
| Thread* const self_; |
| Handle<mirror::Class>* const orig_; |
| const size_t new_length_; |
| const size_t copy_bytes_; |
| DISALLOW_COPY_AND_ASSIGN(CopyClassVisitor); |
| }; |
| |
| Class* Class::CopyOf(Thread* self, int32_t new_length) { |
| DCHECK_GE(new_length, static_cast<int32_t>(sizeof(Class))); |
| // We may get copied by a compacting GC. |
| StackHandleScope<1> hs(self); |
| Handle<mirror::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)); |
| |
| mirror::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)) { |
| CHECK(self->IsExceptionPending()); // Expect an OOME. |
| return NULL; |
| } |
| |
| return new_class->AsClass(); |
| } |
| |
| } // namespace mirror |
| } // namespace art |