/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_RUNTIME_ENTRYPOINTS_ENTRYPOINT_UTILS_INL_H_
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#define ART_RUNTIME_ENTRYPOINTS_ENTRYPOINT_UTILS_INL_H_
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#include "entrypoint_utils.h"
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#include "art_field-inl.h"
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#include "art_method-inl.h"
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#include "base/enums.h"
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#include "base/sdk_version.h"
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#include "class_linker-inl.h"
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#include "common_throws.h"
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#include "dex/dex_file.h"
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#include "dex/invoke_type.h"
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#include "entrypoints/quick/callee_save_frame.h"
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#include "handle_scope-inl.h"
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#include "imt_conflict_table.h"
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#include "imtable-inl.h"
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#include "indirect_reference_table.h"
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#include "jni/jni_internal.h"
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#include "mirror/array-alloc-inl.h"
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#include "mirror/class-alloc-inl.h"
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#include "mirror/class-inl.h"
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#include "mirror/object-inl.h"
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#include "mirror/throwable.h"
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#include "nth_caller_visitor.h"
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#include "runtime.h"
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#include "stack_map.h"
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#include "thread.h"
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#include "well_known_classes.h"
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namespace art {
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inline ArtMethod* GetResolvedMethod(ArtMethod* outer_method,
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const CodeInfo& code_info,
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const BitTableRange<InlineInfo>& inline_infos)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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DCHECK(!outer_method->IsObsolete());
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// This method is being used by artQuickResolutionTrampoline, before it sets up
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// the passed parameters in a GC friendly way. Therefore we must never be
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// suspended while executing it.
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ScopedAssertNoThreadSuspension sants(__FUNCTION__);
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{
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InlineInfo inline_info = inline_infos.back();
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if (inline_info.EncodesArtMethod()) {
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return inline_info.GetArtMethod();
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}
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uint32_t method_index = code_info.GetMethodIndexOf(inline_info);
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if (inline_info.GetDexPc() == static_cast<uint32_t>(-1)) {
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// "charAt" special case. It is the only non-leaf method we inline across dex files.
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ArtMethod* inlined_method = jni::DecodeArtMethod(WellKnownClasses::java_lang_String_charAt);
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DCHECK_EQ(inlined_method->GetDexMethodIndex(), method_index);
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return inlined_method;
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}
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}
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// Find which method did the call in the inlining hierarchy.
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ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
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ArtMethod* method = outer_method;
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for (InlineInfo inline_info : inline_infos) {
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DCHECK(!inline_info.EncodesArtMethod());
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DCHECK_NE(inline_info.GetDexPc(), static_cast<uint32_t>(-1));
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uint32_t method_index = code_info.GetMethodIndexOf(inline_info);
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ArtMethod* inlined_method = class_linker->LookupResolvedMethod(method_index,
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method->GetDexCache(),
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method->GetClassLoader());
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if (UNLIKELY(inlined_method == nullptr)) {
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LOG(FATAL) << "Could not find an inlined method from an .oat file: "
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<< method->GetDexFile()->PrettyMethod(method_index) << " . "
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<< "This must be due to duplicate classes or playing wrongly with class loaders";
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UNREACHABLE();
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}
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DCHECK(!inlined_method->IsRuntimeMethod());
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if (UNLIKELY(inlined_method->GetDexFile() != method->GetDexFile())) {
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// TODO: We could permit inlining within a multi-dex oat file and the boot image,
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// even going back from boot image methods to the same oat file. However, this is
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// not currently implemented in the compiler. Therefore crossing dex file boundary
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// indicates that the inlined definition is not the same as the one used at runtime.
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bool target_sdk_at_least_p =
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IsSdkVersionSetAndAtLeast(Runtime::Current()->GetTargetSdkVersion(), SdkVersion::kP);
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LOG(target_sdk_at_least_p ? FATAL : WARNING)
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<< "Inlined method resolution crossed dex file boundary: from "
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<< method->PrettyMethod()
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<< " in " << method->GetDexFile()->GetLocation() << "/"
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<< static_cast<const void*>(method->GetDexFile())
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<< " to " << inlined_method->PrettyMethod()
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<< " in " << inlined_method->GetDexFile()->GetLocation() << "/"
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<< static_cast<const void*>(inlined_method->GetDexFile()) << ". "
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<< "This must be due to duplicate classes or playing wrongly with class loaders. "
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<< "The runtime is in an unsafe state.";
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}
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method = inlined_method;
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}
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return method;
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}
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ALWAYS_INLINE inline ObjPtr<mirror::Class> CheckObjectAlloc(ObjPtr<mirror::Class> klass,
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Thread* self,
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bool* slow_path)
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REQUIRES_SHARED(Locks::mutator_lock_)
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REQUIRES(!Roles::uninterruptible_) {
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if (UNLIKELY(!klass->IsInstantiable())) {
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self->ThrowNewException("Ljava/lang/InstantiationError;", klass->PrettyDescriptor().c_str());
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*slow_path = true;
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return nullptr; // Failure
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}
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if (UNLIKELY(klass->IsClassClass())) {
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ThrowIllegalAccessError(nullptr, "Class %s is inaccessible",
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klass->PrettyDescriptor().c_str());
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*slow_path = true;
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return nullptr; // Failure
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}
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if (UNLIKELY(!klass->IsInitialized())) {
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StackHandleScope<1> hs(self);
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Handle<mirror::Class> h_klass(hs.NewHandle(klass));
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// EnsureInitialized (the class initializer) might cause a GC.
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// may cause us to suspend meaning that another thread may try to
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// change the allocator while we are stuck in the entrypoints of
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// an old allocator. Also, the class initialization may fail. To
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// handle these cases we mark the slow path boolean as true so
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// that the caller knows to check the allocator type to see if it
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// has changed and to null-check the return value in case the
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// initialization fails.
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*slow_path = true;
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if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(self, h_klass, true, true)) {
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DCHECK(self->IsExceptionPending());
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return nullptr; // Failure
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} else {
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DCHECK(!self->IsExceptionPending());
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}
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return h_klass.Get();
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}
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return klass;
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}
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ALWAYS_INLINE
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inline ObjPtr<mirror::Class> CheckClassInitializedForObjectAlloc(ObjPtr<mirror::Class> klass,
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Thread* self,
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bool* slow_path)
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REQUIRES_SHARED(Locks::mutator_lock_)
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REQUIRES(!Roles::uninterruptible_) {
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if (UNLIKELY(!klass->IsInitialized())) {
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StackHandleScope<1> hs(self);
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Handle<mirror::Class> h_class(hs.NewHandle(klass));
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// EnsureInitialized (the class initializer) might cause a GC.
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// may cause us to suspend meaning that another thread may try to
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// change the allocator while we are stuck in the entrypoints of
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// an old allocator. Also, the class initialization may fail. To
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// handle these cases we mark the slow path boolean as true so
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// that the caller knows to check the allocator type to see if it
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// has changed and to null-check the return value in case the
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// initialization fails.
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*slow_path = true;
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if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(self, h_class, true, true)) {
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DCHECK(self->IsExceptionPending());
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return nullptr; // Failure
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}
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return h_class.Get();
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}
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return klass;
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}
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// Allocate an instance of klass. Throws InstantationError if klass is not instantiable,
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// or IllegalAccessError if klass is j.l.Class. Performs a clinit check too.
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template <bool kInstrumented>
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ALWAYS_INLINE
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inline ObjPtr<mirror::Object> AllocObjectFromCode(ObjPtr<mirror::Class> klass,
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Thread* self,
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gc::AllocatorType allocator_type) {
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bool slow_path = false;
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klass = CheckObjectAlloc(klass, self, &slow_path);
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if (UNLIKELY(slow_path)) {
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if (klass == nullptr) {
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return nullptr;
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}
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// CheckObjectAlloc can cause thread suspension which means we may now be instrumented.
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return klass->Alloc</*kInstrumented=*/true>(
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self,
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Runtime::Current()->GetHeap()->GetCurrentAllocator());
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}
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DCHECK(klass != nullptr);
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return klass->Alloc<kInstrumented>(self, allocator_type);
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}
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// Given the context of a calling Method and a resolved class, create an instance.
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template <bool kInstrumented>
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ALWAYS_INLINE
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inline ObjPtr<mirror::Object> AllocObjectFromCodeResolved(ObjPtr<mirror::Class> klass,
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Thread* self,
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gc::AllocatorType allocator_type) {
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DCHECK(klass != nullptr);
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bool slow_path = false;
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klass = CheckClassInitializedForObjectAlloc(klass, self, &slow_path);
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if (UNLIKELY(slow_path)) {
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if (klass == nullptr) {
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return nullptr;
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}
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gc::Heap* heap = Runtime::Current()->GetHeap();
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// Pass in false since the object cannot be finalizable.
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// CheckClassInitializedForObjectAlloc can cause thread suspension which means we may now be
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// instrumented.
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return klass->Alloc</*kInstrumented=*/true, false>(self, heap->GetCurrentAllocator());
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}
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// Pass in false since the object cannot be finalizable.
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return klass->Alloc<kInstrumented, false>(self, allocator_type);
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}
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// Given the context of a calling Method and an initialized class, create an instance.
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template <bool kInstrumented>
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ALWAYS_INLINE
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inline ObjPtr<mirror::Object> AllocObjectFromCodeInitialized(ObjPtr<mirror::Class> klass,
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Thread* self,
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gc::AllocatorType allocator_type) {
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DCHECK(klass != nullptr);
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// Pass in false since the object cannot be finalizable.
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return klass->Alloc<kInstrumented, false>(self, allocator_type);
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}
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template <bool kAccessCheck>
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ALWAYS_INLINE
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inline ObjPtr<mirror::Class> CheckArrayAlloc(dex::TypeIndex type_idx,
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int32_t component_count,
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ArtMethod* method,
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bool* slow_path) {
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if (UNLIKELY(component_count < 0)) {
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ThrowNegativeArraySizeException(component_count);
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*slow_path = true;
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return nullptr; // Failure
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}
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ObjPtr<mirror::Class> klass = method->GetDexCache()->GetResolvedType(type_idx);
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if (UNLIKELY(klass == nullptr)) { // Not in dex cache so try to resolve
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ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
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klass = class_linker->ResolveType(type_idx, method);
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*slow_path = true;
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if (klass == nullptr) { // Error
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DCHECK(Thread::Current()->IsExceptionPending());
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return nullptr; // Failure
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}
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CHECK(klass->IsArrayClass()) << klass->PrettyClass();
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}
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if (kAccessCheck) {
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ObjPtr<mirror::Class> referrer = method->GetDeclaringClass();
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if (UNLIKELY(!referrer->CanAccess(klass))) {
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ThrowIllegalAccessErrorClass(referrer, klass);
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*slow_path = true;
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return nullptr; // Failure
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}
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}
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return klass;
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}
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// Given the context of a calling Method, use its DexCache to resolve a type to an array Class. If
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// it cannot be resolved, throw an error. If it can, use it to create an array.
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// When verification/compiler hasn't been able to verify access, optionally perform an access
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// check.
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template <bool kAccessCheck, bool kInstrumented>
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ALWAYS_INLINE
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inline ObjPtr<mirror::Array> AllocArrayFromCode(dex::TypeIndex type_idx,
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int32_t component_count,
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ArtMethod* method,
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Thread* self,
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gc::AllocatorType allocator_type) {
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bool slow_path = false;
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ObjPtr<mirror::Class> klass =
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CheckArrayAlloc<kAccessCheck>(type_idx, component_count, method, &slow_path);
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if (UNLIKELY(slow_path)) {
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if (klass == nullptr) {
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return nullptr;
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}
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gc::Heap* heap = Runtime::Current()->GetHeap();
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// CheckArrayAlloc can cause thread suspension which means we may now be instrumented.
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return mirror::Array::Alloc</*kInstrumented=*/true>(self,
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klass,
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component_count,
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klass->GetComponentSizeShift(),
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heap->GetCurrentAllocator());
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}
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return mirror::Array::Alloc<kInstrumented>(self, klass, component_count,
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klass->GetComponentSizeShift(), allocator_type);
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}
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template <bool kInstrumented>
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ALWAYS_INLINE
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inline ObjPtr<mirror::Array> AllocArrayFromCodeResolved(ObjPtr<mirror::Class> klass,
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int32_t component_count,
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Thread* self,
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gc::AllocatorType allocator_type) {
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DCHECK(klass != nullptr);
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if (UNLIKELY(component_count < 0)) {
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ThrowNegativeArraySizeException(component_count);
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return nullptr; // Failure
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}
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// No need to retry a slow-path allocation as the above code won't cause a GC or thread
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// suspension.
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return mirror::Array::Alloc<kInstrumented>(self, klass, component_count,
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klass->GetComponentSizeShift(), allocator_type);
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}
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template<FindFieldType type, bool access_check>
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inline ArtField* FindFieldFromCode(uint32_t field_idx,
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ArtMethod* referrer,
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Thread* self,
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size_t expected_size) {
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constexpr bool is_primitive = (type & FindFieldFlags::PrimitiveBit) != 0;
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constexpr bool is_set = (type & FindFieldFlags::WriteBit) != 0;
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constexpr bool is_static = (type & FindFieldFlags::StaticBit) != 0;
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ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
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ArtField* resolved_field;
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if (access_check) {
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// Slow path: According to JLS 13.4.8, a linkage error may occur if a compile-time
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// qualifying type of a field and the resolved run-time qualifying type of a field differed
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// in their static-ness.
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//
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// In particular, don't assume the dex instruction already correctly knows if the
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// real field is static or not. The resolution must not be aware of this.
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ArtMethod* method = referrer->GetInterfaceMethodIfProxy(kRuntimePointerSize);
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StackHandleScope<2> hs(self);
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Handle<mirror::DexCache> h_dex_cache(hs.NewHandle(method->GetDexCache()));
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Handle<mirror::ClassLoader> h_class_loader(hs.NewHandle(method->GetClassLoader()));
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resolved_field = class_linker->ResolveFieldJLS(field_idx,
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h_dex_cache,
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h_class_loader);
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} else {
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// Fast path: Verifier already would've called ResolveFieldJLS and we wouldn't
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// be executing here if there was a static/non-static mismatch.
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resolved_field = class_linker->ResolveField(field_idx, referrer, is_static);
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}
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if (UNLIKELY(resolved_field == nullptr)) {
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DCHECK(self->IsExceptionPending()); // Throw exception and unwind.
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return nullptr; // Failure.
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}
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ObjPtr<mirror::Class> fields_class = resolved_field->GetDeclaringClass();
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if (access_check) {
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if (UNLIKELY(resolved_field->IsStatic() != is_static)) {
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ThrowIncompatibleClassChangeErrorField(resolved_field, is_static, referrer);
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return nullptr;
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}
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ObjPtr<mirror::Class> referring_class = referrer->GetDeclaringClass();
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if (UNLIKELY(!referring_class->CheckResolvedFieldAccess(fields_class,
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resolved_field,
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referrer->GetDexCache(),
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field_idx))) {
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DCHECK(self->IsExceptionPending()); // Throw exception and unwind.
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return nullptr; // Failure.
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}
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if (UNLIKELY(is_set && resolved_field->IsFinal() && (fields_class != referring_class))) {
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ThrowIllegalAccessErrorFinalField(referrer, resolved_field);
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return nullptr; // Failure.
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} else {
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if (UNLIKELY(resolved_field->IsPrimitiveType() != is_primitive ||
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resolved_field->FieldSize() != expected_size)) {
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self->ThrowNewExceptionF("Ljava/lang/NoSuchFieldError;",
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"Attempted read of %zd-bit %s on field '%s'",
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expected_size * (32 / sizeof(int32_t)),
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is_primitive ? "primitive" : "non-primitive",
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resolved_field->PrettyField(true).c_str());
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return nullptr; // Failure.
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}
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}
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}
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if (!is_static) {
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// instance fields must be being accessed on an initialized class
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return resolved_field;
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} else {
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// If the class is initialized we're done.
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if (LIKELY(fields_class->IsInitialized())) {
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return resolved_field;
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} else {
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StackHandleScope<1> hs(self);
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if (LIKELY(class_linker->EnsureInitialized(self, hs.NewHandle(fields_class), true, true))) {
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// Otherwise let's ensure the class is initialized before resolving the field.
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return resolved_field;
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}
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DCHECK(self->IsExceptionPending()); // Throw exception and unwind
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return nullptr; // Failure.
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}
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}
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}
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// Explicit template declarations of FindFieldFromCode for all field access types.
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#define EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(_type, _access_check) \
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template REQUIRES_SHARED(Locks::mutator_lock_) ALWAYS_INLINE \
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ArtField* FindFieldFromCode<_type, _access_check>(uint32_t field_idx, \
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ArtMethod* referrer, \
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Thread* self, size_t expected_size) \
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#define EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(_type) \
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EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(_type, false); \
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EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(_type, true)
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstanceObjectRead);
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstanceObjectWrite);
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstancePrimitiveRead);
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstancePrimitiveWrite);
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticObjectRead);
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticObjectWrite);
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticPrimitiveRead);
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticPrimitiveWrite);
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#undef EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL
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#undef EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL
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// Follow virtual/interface indirections if applicable.
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// Will throw null-pointer exception the if the object is null.
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template<InvokeType type, bool access_check>
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ALWAYS_INLINE ArtMethod* FindMethodToCall(uint32_t method_idx,
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ArtMethod* resolved_method,
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ObjPtr<mirror::Object>* this_object,
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ArtMethod* referrer,
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Thread* self)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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ClassLinker* const class_linker = Runtime::Current()->GetClassLinker();
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// Null pointer check.
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if (UNLIKELY(*this_object == nullptr && type != kStatic)) {
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if (UNLIKELY(resolved_method->GetDeclaringClass()->IsStringClass() &&
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resolved_method->IsConstructor())) {
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// Hack for String init:
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//
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// We assume that the input of String.<init> in verified code is always
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// an unitialized reference. If it is a null constant, it must have been
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// optimized out by the compiler. Do not throw NullPointerException.
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} else {
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// Maintain interpreter-like semantics where NullPointerException is thrown
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// after potential NoSuchMethodError from class linker.
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ThrowNullPointerExceptionForMethodAccess(method_idx, type);
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return nullptr; // Failure.
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}
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}
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switch (type) {
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case kStatic:
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case kDirect:
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return resolved_method;
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case kVirtual: {
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ObjPtr<mirror::Class> klass = (*this_object)->GetClass();
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uint16_t vtable_index = resolved_method->GetMethodIndex();
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if (access_check &&
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(!klass->HasVTable() ||
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vtable_index >= static_cast<uint32_t>(klass->GetVTableLength()))) {
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// Behavior to agree with that of the verifier.
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ThrowNoSuchMethodError(type, resolved_method->GetDeclaringClass(),
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resolved_method->GetName(), resolved_method->GetSignature());
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return nullptr; // Failure.
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}
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DCHECK(klass->HasVTable()) << klass->PrettyClass();
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return klass->GetVTableEntry(vtable_index, class_linker->GetImagePointerSize());
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}
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case kSuper: {
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// TODO This lookup is quite slow.
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// 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
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// defaults. What we actually need is a GetContainingClass that says which classes virtuals
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// this method is coming from.
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StackHandleScope<2> hs2(self);
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HandleWrapperObjPtr<mirror::Object> h_this(hs2.NewHandleWrapper(this_object));
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Handle<mirror::Class> h_referring_class(hs2.NewHandle(referrer->GetDeclaringClass()));
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const dex::TypeIndex method_type_idx =
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referrer->GetDexFile()->GetMethodId(method_idx).class_idx_;
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ObjPtr<mirror::Class> method_reference_class =
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class_linker->ResolveType(method_type_idx, referrer);
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if (UNLIKELY(method_reference_class == nullptr)) {
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// Bad type idx.
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CHECK(self->IsExceptionPending());
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return nullptr;
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} else if (!method_reference_class->IsInterface()) {
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// It is not an interface. If the referring class is in the class hierarchy of the
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// referenced class in the bytecode, we use its super class. Otherwise, we throw
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// a NoSuchMethodError.
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ObjPtr<mirror::Class> super_class = nullptr;
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if (method_reference_class->IsAssignableFrom(h_referring_class.Get())) {
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super_class = h_referring_class->GetSuperClass();
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}
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uint16_t vtable_index = resolved_method->GetMethodIndex();
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if (access_check) {
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// Check existence of super class.
|
if (super_class == nullptr ||
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!super_class->HasVTable() ||
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vtable_index >= static_cast<uint32_t>(super_class->GetVTableLength())) {
|
// Behavior to agree with that of the verifier.
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ThrowNoSuchMethodError(type, resolved_method->GetDeclaringClass(),
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resolved_method->GetName(), resolved_method->GetSignature());
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return nullptr; // Failure.
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}
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}
|
DCHECK(super_class != nullptr);
|
DCHECK(super_class->HasVTable());
|
return super_class->GetVTableEntry(vtable_index, class_linker->GetImagePointerSize());
|
} else {
|
// It is an interface.
|
if (access_check) {
|
if (!method_reference_class->IsAssignableFrom(h_this->GetClass())) {
|
ThrowIncompatibleClassChangeErrorClassForInterfaceSuper(resolved_method,
|
method_reference_class,
|
h_this.Get(),
|
referrer);
|
return nullptr; // Failure.
|
}
|
}
|
// TODO We can do better than this for a (compiled) fastpath.
|
ArtMethod* result = method_reference_class->FindVirtualMethodForInterfaceSuper(
|
resolved_method, class_linker->GetImagePointerSize());
|
// Throw an NSME if nullptr;
|
if (result == nullptr) {
|
ThrowNoSuchMethodError(type, resolved_method->GetDeclaringClass(),
|
resolved_method->GetName(), resolved_method->GetSignature());
|
}
|
return result;
|
}
|
UNREACHABLE();
|
}
|
case kInterface: {
|
size_t imt_index = resolved_method->GetImtIndex();
|
PointerSize pointer_size = class_linker->GetImagePointerSize();
|
ObjPtr<mirror::Class> klass = (*this_object)->GetClass();
|
ArtMethod* imt_method = klass->GetImt(pointer_size)->Get(imt_index, pointer_size);
|
if (!imt_method->IsRuntimeMethod()) {
|
if (kIsDebugBuild) {
|
ArtMethod* method = klass->FindVirtualMethodForInterface(
|
resolved_method, class_linker->GetImagePointerSize());
|
CHECK_EQ(imt_method, method) << ArtMethod::PrettyMethod(resolved_method) << " / "
|
<< imt_method->PrettyMethod() << " / "
|
<< ArtMethod::PrettyMethod(method) << " / "
|
<< klass->PrettyClass();
|
}
|
return imt_method;
|
} else {
|
ArtMethod* interface_method = klass->FindVirtualMethodForInterface(
|
resolved_method, class_linker->GetImagePointerSize());
|
if (UNLIKELY(interface_method == nullptr)) {
|
ThrowIncompatibleClassChangeErrorClassForInterfaceDispatch(resolved_method,
|
*this_object, referrer);
|
return nullptr; // Failure.
|
}
|
return interface_method;
|
}
|
}
|
default:
|
LOG(FATAL) << "Unknown invoke type " << type;
|
return nullptr; // Failure.
|
}
|
}
|
|
template<InvokeType type, bool access_check>
|
inline ArtMethod* FindMethodFromCode(uint32_t method_idx,
|
ObjPtr<mirror::Object>* this_object,
|
ArtMethod* referrer,
|
Thread* self) {
|
ClassLinker* const class_linker = Runtime::Current()->GetClassLinker();
|
constexpr ClassLinker::ResolveMode resolve_mode =
|
access_check ? ClassLinker::ResolveMode::kCheckICCEAndIAE
|
: ClassLinker::ResolveMode::kNoChecks;
|
ArtMethod* resolved_method;
|
if (type == kStatic) {
|
resolved_method = class_linker->ResolveMethod<resolve_mode>(self, method_idx, referrer, type);
|
} else {
|
StackHandleScope<1> hs(self);
|
HandleWrapperObjPtr<mirror::Object> h_this(hs.NewHandleWrapper(this_object));
|
resolved_method = class_linker->ResolveMethod<resolve_mode>(self, method_idx, referrer, type);
|
}
|
if (UNLIKELY(resolved_method == nullptr)) {
|
DCHECK(self->IsExceptionPending()); // Throw exception and unwind.
|
return nullptr; // Failure.
|
}
|
return FindMethodToCall<type, access_check>(
|
method_idx, resolved_method, this_object, referrer, self);
|
}
|
|
// Explicit template declarations of FindMethodFromCode for all invoke types.
|
#define EXPLICIT_FIND_METHOD_FROM_CODE_TEMPLATE_DECL(_type, _access_check) \
|
template REQUIRES_SHARED(Locks::mutator_lock_) ALWAYS_INLINE \
|
ArtMethod* FindMethodFromCode<_type, _access_check>(uint32_t method_idx, \
|
ObjPtr<mirror::Object>* this_object, \
|
ArtMethod* referrer, \
|
Thread* self)
|
#define EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(_type) \
|
EXPLICIT_FIND_METHOD_FROM_CODE_TEMPLATE_DECL(_type, false); \
|
EXPLICIT_FIND_METHOD_FROM_CODE_TEMPLATE_DECL(_type, true)
|
|
EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kStatic);
|
EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kDirect);
|
EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kVirtual);
|
EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kSuper);
|
EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kInterface);
|
|
#undef EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL
|
#undef EXPLICIT_FIND_METHOD_FROM_CODE_TEMPLATE_DECL
|
|
// Fast path field resolution that can't initialize classes or throw exceptions.
|
inline ArtField* FindFieldFast(uint32_t field_idx, ArtMethod* referrer, FindFieldType type,
|
size_t expected_size) {
|
ScopedAssertNoThreadSuspension ants(__FUNCTION__);
|
ArtField* resolved_field =
|
referrer->GetDexCache()->GetResolvedField(field_idx, kRuntimePointerSize);
|
if (UNLIKELY(resolved_field == nullptr)) {
|
return nullptr;
|
}
|
// Check for incompatible class change.
|
const bool is_primitive = (type & FindFieldFlags::PrimitiveBit) != 0;
|
const bool is_set = (type & FindFieldFlags::WriteBit) != 0;
|
const bool is_static = (type & FindFieldFlags::StaticBit) != 0;
|
if (UNLIKELY(resolved_field->IsStatic() != is_static)) {
|
// Incompatible class change.
|
return nullptr;
|
}
|
ObjPtr<mirror::Class> fields_class = resolved_field->GetDeclaringClass();
|
if (is_static) {
|
// Check class is initialized else fail so that we can contend to initialize the class with
|
// other threads that may be racing to do this.
|
if (UNLIKELY(!fields_class->IsInitialized())) {
|
return nullptr;
|
}
|
}
|
ObjPtr<mirror::Class> referring_class = referrer->GetDeclaringClass();
|
if (UNLIKELY(!referring_class->CanAccess(fields_class) ||
|
!referring_class->CanAccessMember(fields_class, resolved_field->GetAccessFlags()) ||
|
(is_set && resolved_field->IsFinal() && (fields_class != referring_class)))) {
|
// Illegal access.
|
return nullptr;
|
}
|
if (UNLIKELY(resolved_field->IsPrimitiveType() != is_primitive ||
|
resolved_field->FieldSize() != expected_size)) {
|
return nullptr;
|
}
|
return resolved_field;
|
}
|
|
// Fast path method resolution that can't throw exceptions.
|
template <InvokeType type, bool access_check>
|
inline ArtMethod* FindMethodFast(uint32_t method_idx,
|
ObjPtr<mirror::Object> this_object,
|
ArtMethod* referrer) {
|
ScopedAssertNoThreadSuspension ants(__FUNCTION__);
|
if (UNLIKELY(this_object == nullptr && type != kStatic)) {
|
return nullptr;
|
}
|
ObjPtr<mirror::Class> referring_class = referrer->GetDeclaringClass();
|
ObjPtr<mirror::DexCache> dex_cache = referrer->GetDexCache();
|
constexpr ClassLinker::ResolveMode resolve_mode = access_check
|
? ClassLinker::ResolveMode::kCheckICCEAndIAE
|
: ClassLinker::ResolveMode::kNoChecks;
|
ClassLinker* linker = Runtime::Current()->GetClassLinker();
|
ArtMethod* resolved_method = linker->GetResolvedMethod<type, resolve_mode>(method_idx, referrer);
|
if (UNLIKELY(resolved_method == nullptr)) {
|
return nullptr;
|
}
|
if (type == kInterface) { // Most common form of slow path dispatch.
|
return this_object->GetClass()->FindVirtualMethodForInterface(resolved_method,
|
kRuntimePointerSize);
|
} else if (type == kStatic || type == kDirect) {
|
return resolved_method;
|
} else if (type == kSuper) {
|
// TODO This lookup is rather slow.
|
dex::TypeIndex method_type_idx = dex_cache->GetDexFile()->GetMethodId(method_idx).class_idx_;
|
ObjPtr<mirror::Class> method_reference_class = linker->LookupResolvedType(
|
method_type_idx, dex_cache, referrer->GetClassLoader());
|
if (method_reference_class == nullptr) {
|
// Need to do full type resolution...
|
return nullptr;
|
} else if (!method_reference_class->IsInterface()) {
|
// It is not an interface. If the referring class is in the class hierarchy of the
|
// referenced class in the bytecode, we use its super class. Otherwise, we cannot
|
// resolve the method.
|
if (!method_reference_class->IsAssignableFrom(referring_class)) {
|
return nullptr;
|
}
|
ObjPtr<mirror::Class> super_class = referring_class->GetSuperClass();
|
if (resolved_method->GetMethodIndex() >= super_class->GetVTableLength()) {
|
// The super class does not have the method.
|
return nullptr;
|
}
|
return super_class->GetVTableEntry(resolved_method->GetMethodIndex(), kRuntimePointerSize);
|
} else {
|
return method_reference_class->FindVirtualMethodForInterfaceSuper(
|
resolved_method, kRuntimePointerSize);
|
}
|
} else {
|
DCHECK(type == kVirtual);
|
return this_object->GetClass()->GetVTableEntry(
|
resolved_method->GetMethodIndex(), kRuntimePointerSize);
|
}
|
}
|
|
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();
|
}
|
|
inline void UnlockJniSynchronizedMethod(jobject locked, Thread* self) {
|
// Save any pending exception over monitor exit call.
|
ObjPtr<mirror::Throwable> saved_exception = nullptr;
|
if (UNLIKELY(self->IsExceptionPending())) {
|
saved_exception = self->GetException();
|
self->ClearException();
|
}
|
// Decode locked object and unlock, before popping local references.
|
self->DecodeJObject(locked)->MonitorExit(self);
|
if (UNLIKELY(self->IsExceptionPending())) {
|
LOG(FATAL) << "Synchronized JNI code returning with an exception:\n"
|
<< saved_exception->Dump()
|
<< "\nEncountered second exception during implicit MonitorExit:\n"
|
<< self->GetException()->Dump();
|
}
|
// Restore pending exception.
|
if (saved_exception != nullptr) {
|
self->SetException(saved_exception);
|
}
|
}
|
|
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
|
}
|
}
|
|
} // namespace art
|
|
#endif // ART_RUNTIME_ENTRYPOINTS_ENTRYPOINT_UTILS_INL_H_
|
