| /* |
| * Copyright (C) 2012 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. |
| */ |
| |
| #ifndef ART_RUNTIME_ENTRYPOINTS_ENTRYPOINT_UTILS_INL_H_ |
| #define ART_RUNTIME_ENTRYPOINTS_ENTRYPOINT_UTILS_INL_H_ |
| |
| #include "entrypoint_utils.h" |
| |
| #include <sstream> |
| |
| #include "art_field-inl.h" |
| #include "art_method-inl.h" |
| #include "base/enums.h" |
| #include "base/sdk_version.h" |
| #include "class_linker-inl.h" |
| #include "common_throws.h" |
| #include "dex/dex_file.h" |
| #include "dex/invoke_type.h" |
| #include "entrypoints/quick/callee_save_frame.h" |
| #include "handle_scope-inl.h" |
| #include "imt_conflict_table.h" |
| #include "imtable-inl.h" |
| #include "indirect_reference_table.h" |
| #include "mirror/array-alloc-inl.h" |
| #include "mirror/class-alloc-inl.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/object-inl.h" |
| #include "mirror/throwable.h" |
| #include "nth_caller_visitor.h" |
| #include "oat_file.h" |
| #include "reflective_handle_scope-inl.h" |
| #include "runtime.h" |
| #include "stack_map.h" |
| #include "thread.h" |
| #include "well_known_classes.h" |
| |
| namespace art { |
| |
| inline std::string GetResolvedMethodErrorString(ClassLinker* class_linker, |
| ArtMethod* inlined_method, |
| ArtMethod* parent_method, |
| ArtMethod* outer_method, |
| ObjPtr<mirror::DexCache> dex_cache, |
| MethodInfo method_info) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| const uint32_t method_index = method_info.GetMethodIndex(); |
| |
| std::stringstream error_ss; |
| std::string separator = ""; |
| error_ss << "BCP vector {"; |
| for (const DexFile* df : class_linker->GetBootClassPath()) { |
| error_ss << separator << df << "(" << df->GetLocation() << ")"; |
| separator = ", "; |
| } |
| error_ss << "}. oat_dex_files vector: {"; |
| separator = ""; |
| for (const OatDexFile* odf_value : |
| parent_method->GetDexFile()->GetOatDexFile()->GetOatFile()->GetOatDexFiles()) { |
| error_ss << separator << odf_value << "(" << odf_value->GetDexFileLocation() << ")"; |
| separator = ", "; |
| } |
| error_ss << "}. "; |
| if (inlined_method != nullptr) { |
| error_ss << "Inlined method: " << inlined_method->PrettyMethod() << " (" |
| << inlined_method->GetDexFile()->GetLocation() << "/" |
| << static_cast<const void*>(inlined_method->GetDexFile()) << "). "; |
| } else if (dex_cache != nullptr) { |
| error_ss << "Could not find an inlined method from an .oat file, using dex_cache to print the " |
| "inlined method: " |
| << dex_cache->GetDexFile()->PrettyMethod(method_index) << " (" |
| << dex_cache->GetDexFile()->GetLocation() << "/" |
| << static_cast<const void*>(dex_cache->GetDexFile()) << "). "; |
| } else { |
| error_ss << "Both inlined_method and dex_cache are null. This means that we had an OOB access " |
| << "to either bcp_dex_files or oat_dex_files. "; |
| } |
| error_ss << "The outer method is: " << parent_method->PrettyMethod() << " (" |
| << parent_method->GetDexFile()->GetLocation() << "/" |
| << static_cast<const void*>(parent_method->GetDexFile()) |
| << "). The outermost method in the chain is: " << outer_method->PrettyMethod() << " (" |
| << outer_method->GetDexFile()->GetLocation() << "/" |
| << static_cast<const void*>(outer_method->GetDexFile()) |
| << "). MethodInfo: method_index=" << std::dec << method_index |
| << ", is_in_bootclasspath=" << std::boolalpha |
| << (method_info.GetDexFileIndexKind() == MethodInfo::kKindBCP) << std::noboolalpha |
| << ", dex_file_index=" << std::dec << method_info.GetDexFileIndex() << "."; |
| return error_ss.str(); |
| } |
| |
| inline ArtMethod* GetResolvedMethod(ArtMethod* outer_method, |
| const CodeInfo& code_info, |
| const BitTableRange<InlineInfo>& inline_infos) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| DCHECK(!outer_method->IsObsolete()); |
| |
| // This method is being used by artQuickResolutionTrampoline, before it sets up |
| // the passed parameters in a GC friendly way. Therefore we must never be |
| // suspended while executing it. |
| ScopedAssertNoThreadSuspension sants(__FUNCTION__); |
| |
| { |
| InlineInfo inline_info = inline_infos.back(); |
| |
| if (inline_info.EncodesArtMethod()) { |
| return inline_info.GetArtMethod(); |
| } |
| |
| uint32_t method_index = code_info.GetMethodIndexOf(inline_info); |
| if (inline_info.GetDexPc() == static_cast<uint32_t>(-1)) { |
| // "charAt" special case. It is the only non-leaf method we inline across dex files. |
| ArtMethod* inlined_method = WellKnownClasses::java_lang_String_charAt; |
| DCHECK_EQ(inlined_method->GetDexMethodIndex(), method_index); |
| return inlined_method; |
| } |
| } |
| |
| // Find which method did the call in the inlining hierarchy. |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| ArtMethod* method = outer_method; |
| for (InlineInfo inline_info : inline_infos) { |
| DCHECK(!inline_info.EncodesArtMethod()); |
| DCHECK_NE(inline_info.GetDexPc(), static_cast<uint32_t>(-1)); |
| MethodInfo method_info = code_info.GetMethodInfoOf(inline_info); |
| uint32_t method_index = method_info.GetMethodIndex(); |
| const uint32_t dex_file_index = method_info.GetDexFileIndex(); |
| ArtMethod* inlined_method = nullptr; |
| ObjPtr<mirror::DexCache> dex_cache = nullptr; |
| if (method_info.HasDexFileIndex()) { |
| if (method_info.GetDexFileIndexKind() == MethodInfo::kKindBCP) { |
| ArrayRef<const DexFile* const> bcp_dex_files(class_linker->GetBootClassPath()); |
| DCHECK_LT(dex_file_index, bcp_dex_files.size()) |
| << "OOB access to bcp_dex_files. Dumping info: " |
| << GetResolvedMethodErrorString( |
| class_linker, inlined_method, method, outer_method, dex_cache, method_info); |
| const DexFile* dex_file = bcp_dex_files[dex_file_index]; |
| DCHECK_NE(dex_file, nullptr); |
| dex_cache = class_linker->FindDexCache(Thread::Current(), *dex_file); |
| } else { |
| ArrayRef<const OatDexFile* const> oat_dex_files( |
| outer_method->GetDexFile()->GetOatDexFile()->GetOatFile()->GetOatDexFiles()); |
| DCHECK_LT(dex_file_index, oat_dex_files.size()) |
| << "OOB access to oat_dex_files. Dumping info: " |
| << GetResolvedMethodErrorString( |
| class_linker, inlined_method, method, outer_method, dex_cache, method_info); |
| const OatDexFile* odf = oat_dex_files[dex_file_index]; |
| DCHECK_NE(odf, nullptr); |
| dex_cache = class_linker->FindDexCache(Thread::Current(), *odf); |
| } |
| } else { |
| dex_cache = outer_method->GetDexCache(); |
| } |
| inlined_method = |
| class_linker->LookupResolvedMethod(method_index, dex_cache, dex_cache->GetClassLoader()); |
| |
| if (UNLIKELY(inlined_method == nullptr)) { |
| LOG(FATAL) << GetResolvedMethodErrorString( |
| class_linker, inlined_method, method, outer_method, dex_cache, method_info); |
| UNREACHABLE(); |
| } |
| DCHECK(!inlined_method->IsRuntimeMethod()); |
| DCHECK_EQ(inlined_method->GetDexFile() == outer_method->GetDexFile(), |
| dex_file_index == MethodInfo::kSameDexFile) |
| << GetResolvedMethodErrorString( |
| class_linker, inlined_method, method, outer_method, dex_cache, method_info); |
| method = inlined_method; |
| } |
| |
| return method; |
| } |
| |
| ALWAYS_INLINE |
| inline ObjPtr<mirror::Class> CheckClassInitializedForObjectAlloc(ObjPtr<mirror::Class> klass, |
| Thread* self, |
| bool* slow_path) |
| REQUIRES_SHARED(Locks::mutator_lock_) |
| REQUIRES(!Roles::uninterruptible_) { |
| if (UNLIKELY(!klass->IsVisiblyInitialized())) { |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> h_class(hs.NewHandle(klass)); |
| // EnsureInitialized (the class initializer) might cause a GC. |
| // may cause us to suspend meaning that another thread may try to |
| // change the allocator while we are stuck in the entrypoints of |
| // an old allocator. Also, the class initialization may fail. To |
| // handle these cases we mark the slow path boolean as true so |
| // that the caller knows to check the allocator type to see if it |
| // has changed and to null-check the return value in case the |
| // initialization fails. |
| *slow_path = true; |
| if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(self, h_class, true, true)) { |
| DCHECK(self->IsExceptionPending()); |
| return nullptr; // Failure |
| } else { |
| DCHECK(!self->IsExceptionPending()); |
| } |
| return h_class.Get(); |
| } |
| return klass; |
| } |
| |
| ALWAYS_INLINE inline ObjPtr<mirror::Class> CheckObjectAlloc(ObjPtr<mirror::Class> klass, |
| Thread* self, |
| bool* slow_path) |
| REQUIRES_SHARED(Locks::mutator_lock_) |
| REQUIRES(!Roles::uninterruptible_) { |
| if (UNLIKELY(!klass->IsInstantiable())) { |
| self->ThrowNewException("Ljava/lang/InstantiationError;", klass->PrettyDescriptor().c_str()); |
| *slow_path = true; |
| return nullptr; // Failure |
| } |
| if (UNLIKELY(klass->IsClassClass())) { |
| ThrowIllegalAccessError(nullptr, "Class %s is inaccessible", |
| klass->PrettyDescriptor().c_str()); |
| *slow_path = true; |
| return nullptr; // Failure |
| } |
| return CheckClassInitializedForObjectAlloc(klass, self, slow_path); |
| } |
| |
| // Allocate an instance of klass. Throws InstantationError if klass is not instantiable, |
| // or IllegalAccessError if klass is j.l.Class. Performs a clinit check too. |
| template <bool kInstrumented> |
| ALWAYS_INLINE |
| inline ObjPtr<mirror::Object> AllocObjectFromCode(ObjPtr<mirror::Class> klass, |
| Thread* self, |
| gc::AllocatorType allocator_type) { |
| bool slow_path = false; |
| klass = CheckObjectAlloc(klass, self, &slow_path); |
| if (UNLIKELY(slow_path)) { |
| if (klass == nullptr) { |
| return nullptr; |
| } |
| // CheckObjectAlloc can cause thread suspension which means we may now be instrumented. |
| return klass->Alloc</*kInstrumented=*/true>( |
| self, |
| Runtime::Current()->GetHeap()->GetCurrentAllocator()); |
| } |
| DCHECK(klass != nullptr); |
| return klass->Alloc<kInstrumented>(self, allocator_type); |
| } |
| |
| // Given the context of a calling Method and a resolved class, create an instance. |
| template <bool kInstrumented> |
| ALWAYS_INLINE |
| inline ObjPtr<mirror::Object> AllocObjectFromCodeResolved(ObjPtr<mirror::Class> klass, |
| Thread* self, |
| gc::AllocatorType allocator_type) { |
| DCHECK(klass != nullptr); |
| bool slow_path = false; |
| klass = CheckClassInitializedForObjectAlloc(klass, self, &slow_path); |
| if (UNLIKELY(slow_path)) { |
| if (klass == nullptr) { |
| return nullptr; |
| } |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| // Pass in kNoAddFinalizer since the object cannot be finalizable. |
| // CheckClassInitializedForObjectAlloc can cause thread suspension which means we may now be |
| // instrumented. |
| return klass->Alloc</*kInstrumented=*/true, mirror::Class::AddFinalizer::kNoAddFinalizer>( |
| self, heap->GetCurrentAllocator()); |
| } |
| // Pass in kNoAddFinalizer since the object cannot be finalizable. |
| return klass->Alloc<kInstrumented, |
| mirror::Class::AddFinalizer::kNoAddFinalizer>(self, allocator_type); |
| } |
| |
| // Given the context of a calling Method and an initialized class, create an instance. |
| template <bool kInstrumented> |
| ALWAYS_INLINE |
| inline ObjPtr<mirror::Object> AllocObjectFromCodeInitialized(ObjPtr<mirror::Class> klass, |
| Thread* self, |
| gc::AllocatorType allocator_type) { |
| DCHECK(klass != nullptr); |
| // Pass in kNoAddFinalizer since the object cannot be finalizable. |
| return klass->Alloc<kInstrumented, |
| mirror::Class::AddFinalizer::kNoAddFinalizer>(self, allocator_type); |
| } |
| |
| |
| template <bool kAccessCheck> |
| ALWAYS_INLINE |
| inline ObjPtr<mirror::Class> CheckArrayAlloc(dex::TypeIndex type_idx, |
| int32_t component_count, |
| ArtMethod* method, |
| bool* slow_path) { |
| if (UNLIKELY(component_count < 0)) { |
| ThrowNegativeArraySizeException(component_count); |
| *slow_path = true; |
| return nullptr; // Failure |
| } |
| ObjPtr<mirror::Class> klass = method->GetDexCache()->GetResolvedType(type_idx); |
| if (UNLIKELY(klass == nullptr)) { // Not in dex cache so try to resolve |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| klass = class_linker->ResolveType(type_idx, method); |
| *slow_path = true; |
| if (klass == nullptr) { // Error |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return nullptr; // Failure |
| } |
| CHECK(klass->IsArrayClass()) << klass->PrettyClass(); |
| } |
| if (kAccessCheck) { |
| ObjPtr<mirror::Class> referrer = method->GetDeclaringClass(); |
| if (UNLIKELY(!referrer->CanAccess(klass))) { |
| ThrowIllegalAccessErrorClass(referrer, klass); |
| *slow_path = true; |
| return nullptr; // Failure |
| } |
| } |
| return klass; |
| } |
| |
| // Given the context of a calling Method, use its DexCache to resolve a type to an array Class. If |
| // it cannot be resolved, throw an error. If it can, use it to create an array. |
| // When verification/compiler hasn't been able to verify access, optionally perform an access |
| // check. |
| template <bool kAccessCheck, bool kInstrumented> |
| ALWAYS_INLINE |
| inline ObjPtr<mirror::Array> AllocArrayFromCode(dex::TypeIndex type_idx, |
| int32_t component_count, |
| ArtMethod* method, |
| Thread* self, |
| gc::AllocatorType allocator_type) { |
| bool slow_path = false; |
| ObjPtr<mirror::Class> klass = |
| CheckArrayAlloc<kAccessCheck>(type_idx, component_count, method, &slow_path); |
| if (UNLIKELY(slow_path)) { |
| if (klass == nullptr) { |
| return nullptr; |
| } |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| // CheckArrayAlloc can cause thread suspension which means we may now be instrumented. |
| return mirror::Array::Alloc</*kInstrumented=*/true>(self, |
| klass, |
| component_count, |
| klass->GetComponentSizeShift(), |
| heap->GetCurrentAllocator()); |
| } |
| return mirror::Array::Alloc<kInstrumented>(self, |
| klass, |
| component_count, |
| klass->GetComponentSizeShift(), |
| allocator_type); |
| } |
| |
| template <bool kInstrumented> |
| ALWAYS_INLINE |
| inline ObjPtr<mirror::Array> AllocArrayFromCodeResolved(ObjPtr<mirror::Class> klass, |
| int32_t component_count, |
| Thread* self, |
| gc::AllocatorType allocator_type) { |
| DCHECK(klass != nullptr); |
| if (UNLIKELY(component_count < 0)) { |
| ThrowNegativeArraySizeException(component_count); |
| return nullptr; // Failure |
| } |
| // No need to retry a slow-path allocation as the above code won't cause a GC or thread |
| // suspension. |
| return mirror::Array::Alloc<kInstrumented>(self, |
| klass, |
| component_count, |
| klass->GetComponentSizeShift(), |
| allocator_type); |
| } |
| |
| FLATTEN |
| inline ArtField* ResolveFieldWithAccessChecks(Thread* self, |
| ClassLinker* class_linker, |
| uint16_t field_index, |
| ArtMethod* caller, |
| bool is_static, |
| bool is_put, |
| size_t resolve_field_type) // Resolve if not zero |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (caller->SkipAccessChecks()) { |
| return class_linker->ResolveField(field_index, caller, is_static); |
| } |
| |
| caller = caller->GetInterfaceMethodIfProxy(class_linker->GetImagePointerSize()); |
| |
| StackHandleScope<2> hs(self); |
| Handle<mirror::DexCache> h_dex_cache(hs.NewHandle(caller->GetDexCache())); |
| Handle<mirror::ClassLoader> h_class_loader(hs.NewHandle(caller->GetClassLoader())); |
| |
| ArtField* resolved_field = class_linker->ResolveFieldJLS(field_index, |
| h_dex_cache, |
| h_class_loader); |
| if (resolved_field == nullptr) { |
| return nullptr; |
| } |
| |
| ObjPtr<mirror::Class> fields_class = resolved_field->GetDeclaringClass(); |
| if (UNLIKELY(resolved_field->IsStatic() != is_static)) { |
| ThrowIncompatibleClassChangeErrorField(resolved_field, is_static, caller); |
| return nullptr; |
| } |
| ObjPtr<mirror::Class> referring_class = caller->GetDeclaringClass(); |
| if (UNLIKELY(!referring_class->CheckResolvedFieldAccess(fields_class, |
| resolved_field, |
| caller->GetDexCache(), |
| field_index))) { |
| DCHECK(self->IsExceptionPending()); |
| return nullptr; |
| } |
| if (UNLIKELY(is_put && !resolved_field->CanBeChangedBy(caller))) { |
| ThrowIllegalAccessErrorFinalField(caller, resolved_field); |
| return nullptr; |
| } |
| |
| if (resolve_field_type != 0u) { |
| StackArtFieldHandleScope<1> rhs(self); |
| ReflectiveHandle<ArtField> field_handle(rhs.NewHandle(resolved_field)); |
| if (resolved_field->ResolveType().IsNull()) { |
| DCHECK(self->IsExceptionPending()); |
| return nullptr; |
| } |
| resolved_field = field_handle.Get(); |
| } |
| return resolved_field; |
| } |
| |
| template<FindFieldType type> |
| inline ArtField* FindFieldFromCode(uint32_t field_idx, |
| ArtMethod* referrer, |
| Thread* self, |
| bool should_resolve_type = false) { |
| constexpr bool is_set = (type & FindFieldFlags::WriteBit) != 0; |
| constexpr bool is_static = (type & FindFieldFlags::StaticBit) != 0; |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| ArtField* resolved_field = ResolveFieldWithAccessChecks( |
| self, class_linker, field_idx, referrer, is_static, is_set, should_resolve_type ? 1u : 0u); |
| if (!is_static || resolved_field == nullptr) { |
| // instance fields must be being accessed on an initialized class |
| return resolved_field; |
| } else { |
| ObjPtr<mirror::Class> fields_class = resolved_field->GetDeclaringClass(); |
| // If the class is initialized we're done. |
| if (LIKELY(fields_class->IsVisiblyInitialized())) { |
| return resolved_field; |
| } else { |
| StackHandleScope<1> hs(self); |
| StackArtFieldHandleScope<1> rhs(self); |
| ReflectiveHandle<ArtField> resolved_field_handle(rhs.NewHandle(resolved_field)); |
| if (LIKELY(class_linker->EnsureInitialized(self, hs.NewHandle(fields_class), true, true))) { |
| // Otherwise let's ensure the class is initialized before resolving the field. |
| return resolved_field_handle.Get(); |
| } |
| DCHECK(self->IsExceptionPending()); // Throw exception and unwind |
| return nullptr; // Failure. |
| } |
| } |
| } |
| |
| // NOLINTBEGIN(bugprone-macro-parentheses) |
| // Explicit template declarations of FindFieldFromCode for all field access types. |
| #define EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(_type) \ |
| template REQUIRES_SHARED(Locks::mutator_lock_) ALWAYS_INLINE \ |
| ArtField* FindFieldFromCode<_type>(uint32_t field_idx, \ |
| ArtMethod* referrer, \ |
| Thread* self, \ |
| bool should_resolve_type = false) \ |
| |
| EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(InstanceObjectRead); |
| EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(InstanceObjectWrite); |
| EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(InstancePrimitiveRead); |
| EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(InstancePrimitiveWrite); |
| EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(StaticObjectRead); |
| EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(StaticObjectWrite); |
| EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(StaticPrimitiveRead); |
| EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(StaticPrimitiveWrite); |
| |
| #undef EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL |
| // NOLINTEND(bugprone-macro-parentheses) |
| |
| static inline bool IsStringInit(const DexFile* dex_file, uint32_t method_idx) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| const dex::MethodId& method_id = dex_file->GetMethodId(method_idx); |
| const char* class_name = dex_file->StringByTypeIdx(method_id.class_idx_); |
| const char* method_name = dex_file->GetMethodName(method_id); |
| // Instead of calling ResolveMethod() which has suspend point and can trigger |
| // GC, look up the method symbolically. |
| // Compare method's class name and method name against string init. |
| // It's ok since it's not allowed to create your own java/lang/String. |
| // TODO: verify that assumption. |
| if ((strcmp(class_name, "Ljava/lang/String;") == 0) && |
| (strcmp(method_name, "<init>") == 0)) { |
| return true; |
| } |
| return false; |
| } |
| |
| static inline bool IsStringInit(const Instruction& instr, ArtMethod* caller) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (instr.Opcode() == Instruction::INVOKE_DIRECT || |
| instr.Opcode() == Instruction::INVOKE_DIRECT_RANGE) { |
| uint16_t callee_method_idx = (instr.Opcode() == Instruction::INVOKE_DIRECT_RANGE) ? |
| instr.VRegB_3rc() : instr.VRegB_35c(); |
| return IsStringInit(caller->GetDexFile(), callee_method_idx); |
| } |
| return false; |
| } |
| |
| extern "C" size_t NterpGetMethod(Thread* self, ArtMethod* caller, const uint16_t* dex_pc_ptr); |
| |
| template <InvokeType type> |
| ArtMethod* FindMethodToCall(Thread* self, |
| ArtMethod* caller, |
| ObjPtr<mirror::Object>* this_object, |
| const Instruction& inst, |
| /*out*/ bool* string_init) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| PointerSize pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); |
| |
| // Try to find the method in thread-local cache. |
| size_t tls_value = 0u; |
| if (!self->GetInterpreterCache()->Get(self, &inst, &tls_value)) { |
| DCHECK(!self->IsExceptionPending()); |
| // NterpGetMethod can suspend, so save this_object. |
| StackHandleScope<1> hs(self); |
| HandleWrapperObjPtr<mirror::Object> h_this(hs.NewHandleWrapper(this_object)); |
| tls_value = NterpGetMethod(self, caller, reinterpret_cast<const uint16_t*>(&inst)); |
| if (self->IsExceptionPending()) { |
| return nullptr; |
| } |
| } |
| |
| if (type != kStatic && UNLIKELY((*this_object) == nullptr)) { |
| if (UNLIKELY(IsStringInit(inst, caller))) { |
| // Hack for String init: |
| // |
| // We assume that the input of String.<init> in verified code is always |
| // an uninitialized reference. If it is a null constant, it must have been |
| // optimized out by the compiler and we arrive here after deoptimization. |
| // Do not throw NullPointerException. |
| } else { |
| // Maintain interpreter-like semantics where NullPointerException is thrown |
| // after potential NoSuchMethodError from class linker. |
| const uint32_t method_idx = inst.VRegB(); |
| ThrowNullPointerExceptionForMethodAccess(method_idx, type); |
| return nullptr; |
| } |
| } |
| |
| static constexpr size_t kStringInitMethodFlag = 0b1; |
| static constexpr size_t kInvokeInterfaceOnObjectMethodFlag = 0b1; |
| static constexpr size_t kMethodMask = ~0b11; |
| |
| ArtMethod* called_method = nullptr; |
| switch (type) { |
| case kDirect: |
| case kSuper: |
| case kStatic: |
| // Note: for the interpreter, the String.<init> special casing for invocation is handled |
| // in DoCallCommon. |
| *string_init = ((tls_value & kStringInitMethodFlag) != 0); |
| DCHECK_EQ(*string_init, IsStringInit(inst, caller)); |
| called_method = reinterpret_cast<ArtMethod*>(tls_value & kMethodMask); |
| break; |
| case kInterface: |
| if ((tls_value & kInvokeInterfaceOnObjectMethodFlag) != 0) { |
| // invokeinterface on a j.l.Object method. |
| uint16_t method_index = tls_value >> 16; |
| called_method = (*this_object)->GetClass()->GetVTableEntry(method_index, pointer_size); |
| } else { |
| ArtMethod* interface_method = reinterpret_cast<ArtMethod*>(tls_value & kMethodMask); |
| called_method = (*this_object)->GetClass()->GetImt(pointer_size)->Get( |
| interface_method->GetImtIndex(), pointer_size); |
| if (called_method->IsRuntimeMethod()) { |
| called_method = (*this_object)->GetClass()->FindVirtualMethodForInterface( |
| interface_method, pointer_size); |
| if (UNLIKELY(called_method == nullptr)) { |
| ThrowIncompatibleClassChangeErrorClassForInterfaceDispatch( |
| interface_method, *this_object, caller); |
| return nullptr; |
| } |
| } |
| } |
| break; |
| case kVirtual: |
| called_method = (*this_object)->GetClass()->GetVTableEntry(tls_value, pointer_size); |
| break; |
| } |
| |
| if (UNLIKELY(!called_method->IsInvokable())) { |
| called_method->ThrowInvocationTimeError((type == kStatic) ? nullptr : *this_object); |
| return nullptr; |
| } |
| DCHECK(!called_method->IsRuntimeMethod()) << called_method->PrettyMethod(); |
| return called_method; |
| } |
| |
| template<bool access_check> |
| ALWAYS_INLINE ArtMethod* FindSuperMethodToCall(uint32_t method_idx, |
| ArtMethod* resolved_method, |
| ArtMethod* referrer, |
| Thread* self) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| // TODO This lookup is quite slow. |
| // NB This is actually quite tricky to do any other way. We cannot use GetDeclaringClass since |
| // that will actually not be what we want in some cases where there are miranda methods or |
| // defaults. What we actually need is a GetContainingClass that says which classes virtuals |
| // this method is coming from. |
| ClassLinker* linker = Runtime::Current()->GetClassLinker(); |
| dex::TypeIndex type_idx = referrer->GetDexFile()->GetMethodId(method_idx).class_idx_; |
| ObjPtr<mirror::Class> referenced_class = linker->ResolveType(type_idx, referrer); |
| if (UNLIKELY(referenced_class == nullptr)) { |
| DCHECK(self->IsExceptionPending()); |
| return nullptr; |
| } |
| |
| if (access_check) { |
| if (!referenced_class->IsAssignableFrom(referrer->GetDeclaringClass())) { |
| ThrowNoSuchMethodError(kSuper, |
| resolved_method->GetDeclaringClass(), |
| resolved_method->GetName(), |
| resolved_method->GetSignature()); |
| return nullptr; |
| } |
| } |
| |
| if (referenced_class->IsInterface()) { |
| // TODO We can do better than this for a (compiled) fastpath. |
| ArtMethod* found_method = referenced_class->FindVirtualMethodForInterfaceSuper( |
| resolved_method, linker->GetImagePointerSize()); |
| DCHECK(found_method != nullptr); |
| return found_method; |
| } |
| |
| DCHECK(resolved_method->IsCopied() || |
| !resolved_method->GetDeclaringClass()->IsInterface()); |
| |
| uint16_t vtable_index = resolved_method->GetMethodIndex(); |
| ObjPtr<mirror::Class> super_class = referrer->GetDeclaringClass()->GetSuperClass(); |
| if (access_check) { |
| DCHECK(super_class == nullptr || super_class->HasVTable()); |
| // Check existence of super class. |
| if (super_class == nullptr || |
| vtable_index >= static_cast<uint32_t>(super_class->GetVTableLength())) { |
| // Behavior to agree with that of the verifier. |
| ThrowNoSuchMethodError(kSuper, |
| resolved_method->GetDeclaringClass(), |
| resolved_method->GetName(), |
| resolved_method->GetSignature()); |
| return nullptr; // Failure. |
| } |
| } |
| DCHECK(super_class != nullptr); |
| DCHECK(super_class->HasVTable()); |
| return super_class->GetVTableEntry(vtable_index, linker->GetImagePointerSize()); |
| } |
| |
| inline ObjPtr<mirror::Class> ResolveVerifyAndClinit(dex::TypeIndex type_idx, |
| ArtMethod* referrer, |
| Thread* self, |
| bool can_run_clinit, |
| bool verify_access) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| ObjPtr<mirror::Class> klass = class_linker->ResolveType(type_idx, referrer); |
| if (UNLIKELY(klass == nullptr)) { |
| CHECK(self->IsExceptionPending()); |
| return nullptr; // Failure - Indicate to caller to deliver exception |
| } |
| // Perform access check if necessary. |
| ObjPtr<mirror::Class> referring_class = referrer->GetDeclaringClass(); |
| if (verify_access && UNLIKELY(!referring_class->CanAccess(klass))) { |
| ThrowIllegalAccessErrorClass(referring_class, klass); |
| return nullptr; // Failure - Indicate to caller to deliver exception |
| } |
| // If we're just implementing const-class, we shouldn't call <clinit>. |
| if (!can_run_clinit) { |
| return klass; |
| } |
| // If we are the <clinit> of this class, just return our storage. |
| // |
| // Do not set the DexCache InitializedStaticStorage, since that implies <clinit> has finished |
| // running. |
| if (klass == referring_class && referrer->IsConstructor() && referrer->IsStatic()) { |
| return klass; |
| } |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> h_class(hs.NewHandle(klass)); |
| if (!class_linker->EnsureInitialized(self, h_class, true, true)) { |
| CHECK(self->IsExceptionPending()); |
| return nullptr; // Failure - Indicate to caller to deliver exception |
| } |
| return h_class.Get(); |
| } |
| |
| template <typename INT_TYPE, typename FLOAT_TYPE> |
| inline INT_TYPE art_float_to_integral(FLOAT_TYPE f) { |
| const INT_TYPE kMaxInt = static_cast<INT_TYPE>(std::numeric_limits<INT_TYPE>::max()); |
| const INT_TYPE kMinInt = static_cast<INT_TYPE>(std::numeric_limits<INT_TYPE>::min()); |
| const FLOAT_TYPE kMaxIntAsFloat = static_cast<FLOAT_TYPE>(kMaxInt); |
| const FLOAT_TYPE kMinIntAsFloat = static_cast<FLOAT_TYPE>(kMinInt); |
| if (LIKELY(f > kMinIntAsFloat)) { |
| if (LIKELY(f < kMaxIntAsFloat)) { |
| return static_cast<INT_TYPE>(f); |
| } else { |
| return kMaxInt; |
| } |
| } else { |
| return (f != f) ? 0 : kMinInt; // f != f implies NaN |
| } |
| } |
| |
| inline bool NeedsClinitCheckBeforeCall(ArtMethod* method) { |
| // The class needs to be visibly initialized before we can use entrypoints to |
| // compiled code for static methods. See b/18161648 . The class initializer is |
| // special as it is invoked during initialization and does not need the check. |
| return method->IsStatic() && !method->IsConstructor(); |
| } |
| |
| inline ObjPtr<mirror::Object> GetGenericJniSynchronizationObject(Thread* self, ArtMethod* called) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| DCHECK(!called->IsCriticalNative()); |
| DCHECK(!called->IsFastNative()); |
| DCHECK(self->GetManagedStack()->GetTopQuickFrame() != nullptr); |
| DCHECK_EQ(*self->GetManagedStack()->GetTopQuickFrame(), called); |
| // We do not need read barriers here. |
| // On method entry, all reference arguments are to-space references and we mark the |
| // declaring class of a static native method if needed. When visiting thread roots at |
| // the start of a GC, we visit all these references to ensure they point to the to-space. |
| if (called->IsStatic()) { |
| // Static methods synchronize on the declaring class object. |
| return called->GetDeclaringClass<kWithoutReadBarrier>(); |
| } else { |
| // Instance methods synchronize on the `this` object. |
| // The `this` reference is stored in the first out vreg in the caller's frame. |
| uint8_t* sp = reinterpret_cast<uint8_t*>(self->GetManagedStack()->GetTopQuickFrame()); |
| size_t frame_size = RuntimeCalleeSaveFrame::GetFrameSize(CalleeSaveType::kSaveRefsAndArgs); |
| StackReference<mirror::Object>* this_ref = reinterpret_cast<StackReference<mirror::Object>*>( |
| sp + frame_size + static_cast<size_t>(kRuntimePointerSize)); |
| return this_ref->AsMirrorPtr(); |
| } |
| } |
| |
| } // namespace art |
| |
| #endif // ART_RUNTIME_ENTRYPOINTS_ENTRYPOINT_UTILS_INL_H_ |
