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.kotlin.kotlin-compiler.1.3.11.source-code.PropertyReferenceCodegen.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2015 JetBrains s.r.o.
*
* 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.
*/
package org.jetbrains.kotlin.codegen
import org.jetbrains.kotlin.builtins.KotlinBuiltIns
import org.jetbrains.kotlin.builtins.ReflectionTypes
import org.jetbrains.kotlin.codegen.AsmUtil.method
import org.jetbrains.kotlin.codegen.binding.CodegenBinding
import org.jetbrains.kotlin.codegen.context.ClassContext
import org.jetbrains.kotlin.codegen.state.GenerationState
import org.jetbrains.kotlin.descriptors.*
import org.jetbrains.kotlin.descriptors.annotations.Annotations
import org.jetbrains.kotlin.descriptors.impl.LocalVariableDescriptor
import org.jetbrains.kotlin.incremental.components.NoLookupLocation
import org.jetbrains.kotlin.load.java.JvmAbi
import org.jetbrains.kotlin.psi.KtElement
import org.jetbrains.kotlin.resolve.DescriptorFactory
import org.jetbrains.kotlin.resolve.DescriptorUtils
import org.jetbrains.kotlin.resolve.PropertyImportedFromObject
import org.jetbrains.kotlin.resolve.descriptorUtil.getSuperClassNotAny
import org.jetbrains.kotlin.resolve.jvm.AsmTypes.*
import org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOrigin
import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature
import org.jetbrains.kotlin.types.*
import org.jetbrains.kotlin.types.typeUtil.builtIns
import org.jetbrains.kotlin.util.OperatorNameConventions
import org.jetbrains.kotlin.utils.sure
import org.jetbrains.org.objectweb.asm.Opcodes.*
import org.jetbrains.org.objectweb.asm.Type
import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter
import org.jetbrains.org.objectweb.asm.commons.Method
class PropertyReferenceCodegen(
state: GenerationState,
parentCodegen: MemberCodegen<*>,
context: ClassContext,
expression: KtElement,
classBuilder: ClassBuilder,
private val localVariableDescriptorForReference: VariableDescriptor,
private val target: VariableDescriptor,
private val receiverType: Type?
) : MemberCodegen(state, parentCodegen, context, expression, classBuilder) {
private val classDescriptor = context.contextDescriptor
private val asmType = typeMapper.mapClass(classDescriptor)
// e.g. MutablePropertyReference0
private val superAsmType = typeMapper.mapClass(classDescriptor.getSuperClassNotAny().sure { "No super class for $classDescriptor" })
private val isLocalDelegatedProperty = target is LocalVariableDescriptor
private val getFunction =
if (isLocalDelegatedProperty)
(localVariableDescriptorForReference as VariableDescriptorWithAccessors).getter!!
else
findGetFunction(localVariableDescriptorForReference).original
// e.g. mutableProperty0(Lkotlin/jvm/internal/MutablePropertyReference0;)Lkotlin/reflect/KMutableProperty0;
private val wrapperMethod = getWrapperMethodForPropertyReference(target, getFunction.valueParameters.size)
private val closure = bindingContext.get(CodegenBinding.CLOSURE, classDescriptor)!!.apply {
assert((capturedReceiverFromOuterContext != null) == (receiverType != null)) {
"Bound property reference can only be generated with the type of the receiver. " +
"Captured type = $capturedReceiverFromOuterContext, actual type = $receiverType"
}
}
private val constructorArgs =
ClosureCodegen.calculateConstructorParameters(typeMapper, state.languageVersionSettings, closure, asmType).apply {
assert(size <= 1) { "Bound property reference should capture only one value: $this" }
}
private val constructor = method("", Type.VOID_TYPE, *constructorArgs.map { it.fieldType }.toTypedArray())
override fun generateDeclaration() {
v.defineClass(
element,
state.classFileVersion,
ACC_FINAL or ACC_SUPER or AsmUtil.getVisibilityAccessFlagForClass(classDescriptor),
asmType.internalName,
null,
superAsmType.internalName,
emptyArray()
)
v.visitSource(element.containingFile.name, null)
}
// TODO: ImplementationBodyCodegen.markLineNumberForSyntheticFunction?
override fun generateBody() {
if (JvmCodegenUtil.isConst(closure)) {
generateConstInstance(asmType, wrapperMethod.returnType)
} else {
AsmUtil.genClosureFields(closure, v, typeMapper, state.languageVersionSettings)
}
generateConstructor()
generateMethod("property reference getName", ACC_PUBLIC, method("getName", JAVA_STRING_TYPE)) {
aconst(target.name.asString())
}
generateMethod("property reference getSignature", ACC_PUBLIC, method("getSignature", JAVA_STRING_TYPE)) {
generateCallableReferenceSignature(this, target, state)
}
generateMethod("property reference getOwner", ACC_PUBLIC, method("getOwner", K_DECLARATION_CONTAINER_TYPE)) {
ClosureCodegen.generateCallableReferenceDeclarationContainer(this, target, state)
}
if (!isLocalDelegatedProperty) {
generateAccessors()
}
}
private fun generateConstructor() {
generateMethod("property reference init", 0, constructor) {
val shouldHaveBoundReferenceReceiver = closure.isForBoundCallableReference()
val receiverIndexAndType = generateClosureFieldsInitializationFromParameters(closure, constructorArgs)
if (receiverIndexAndType == null) {
assert(!shouldHaveBoundReferenceReceiver) { "No bound reference receiver in constructor parameters: $constructorArgs" }
load(0, OBJECT_TYPE)
invokespecial(superAsmType.internalName, "", "()V", false)
} else {
val (receiverIndex, receiverType) = receiverIndexAndType
load(0, OBJECT_TYPE)
loadBoundReferenceReceiverParameter(receiverIndex, receiverType)
invokespecial(superAsmType.internalName, "", "(Ljava/lang/Object;)V", false)
}
}
}
private fun generateAccessors() {
val getFunction = findGetFunction(localVariableDescriptorForReference)
val getImpl = createFakeOpenDescriptor(getFunction, classDescriptor)
functionCodegen.generateMethod(
JvmDeclarationOrigin.NO_ORIGIN,
getImpl,
PropertyReferenceGenerationStrategy(
true,
getFunction,
target,
asmType,
receiverType,
element,
state,
false
)
)
if (!ReflectionTypes.isNumberedKMutablePropertyType(localVariableDescriptorForReference.type)) return
val setFunction = localVariableDescriptorForReference.type.memberScope.getContributedFunctions(
OperatorNameConventions.SET,
NoLookupLocation.FROM_BACKEND
).single()
val setImpl = createFakeOpenDescriptor(setFunction, classDescriptor)
functionCodegen.generateMethod(
JvmDeclarationOrigin.NO_ORIGIN,
setImpl,
PropertyReferenceGenerationStrategy(
false,
setFunction,
target,
asmType,
receiverType,
element,
state,
false
)
)
}
private fun generateMethod(debugString: String, access: Int, method: Method, generate: InstructionAdapter.() -> Unit) {
v.generateMethod(debugString, access, method, element, JvmDeclarationOrigin.NO_ORIGIN, state, generate)
}
override fun generateKotlinMetadataAnnotation() {
writeSyntheticClassMetadata(v, state)
}
fun putInstanceOnStack(receiverValue: StackValue?): StackValue {
return StackValue.operation(wrapperMethod.returnType) { iv ->
if (JvmCodegenUtil.isConst(closure)) {
assert(receiverValue == null) { "No receiver expected for unbound property reference: $classDescriptor" }
iv.getstatic(asmType.internalName, JvmAbi.INSTANCE_FIELD, wrapperMethod.returnType.descriptor)
} else {
assert(receiverValue != null) { "Receiver expected for bound property reference: $classDescriptor" }
iv.anew(asmType)
iv.dup()
receiverValue!!.put(receiverValue.type, receiverValue.kotlinType, iv)
iv.invokespecial(asmType.internalName, "", constructor.descriptor, false)
}
}
}
companion object {
@JvmField
val ANY_SUBSTITUTOR = TypeSubstitutor.create(object : TypeSubstitution() {
override fun get(key: KotlinType): TypeProjection? {
if (KotlinBuiltIns.isUnit(key)) {
return TypeProjectionImpl(key)
}
return TypeProjectionImpl(key.builtIns.nullableAnyType)
}
})
@JvmStatic
fun generateCallableReferenceSignature(iv: InstructionAdapter, callable: CallableDescriptor, state: GenerationState) {
iv.aconst(getSignatureString(callable, state))
}
@JvmStatic
fun getSignatureString(callable: CallableDescriptor, state: GenerationState): String {
if (callable is LocalVariableDescriptor) {
val asmType = state.bindingContext.get(CodegenBinding.DELEGATED_PROPERTY_METADATA_OWNER, callable)
?: throw AssertionError("No delegated property metadata owner for $callable")
val localDelegatedProperties = CodegenBinding.getLocalDelegatedProperties(state.bindingContext, asmType)
val index = localDelegatedProperties?.indexOf(callable) ?: -1
if (index < 0) {
throw AssertionError("Local delegated property is not found in $asmType: $callable")
}
return ""
}
val accessor = when (callable) {
is FunctionDescriptor -> callable
is VariableDescriptorWithAccessors ->
callable.getter ?: DescriptorFactory.createDefaultGetter(callable as PropertyDescriptor, Annotations.EMPTY).apply {
initialize(callable.type)
}
else -> error("Unsupported callable reference: $callable")
}
val declaration = DescriptorUtils.unwrapFakeOverride(accessor).original
val method = state.typeMapper.mapAsmMethod(declaration)
return method.name + method.descriptor
}
@JvmStatic
fun getWrapperMethodForPropertyReference(property: VariableDescriptor, receiverCount: Int): Method {
return when (receiverCount) {
2 -> when {
property.isVar -> method("mutableProperty2", K_MUTABLE_PROPERTY2_TYPE, MUTABLE_PROPERTY_REFERENCE2)
else -> method("property2", K_PROPERTY2_TYPE, PROPERTY_REFERENCE2)
}
1 -> when {
property.isVar -> method("mutableProperty1", K_MUTABLE_PROPERTY1_TYPE, MUTABLE_PROPERTY_REFERENCE1)
else -> method("property1", K_PROPERTY1_TYPE, PROPERTY_REFERENCE1)
}
else -> when {
property.isVar -> method("mutableProperty0", K_MUTABLE_PROPERTY0_TYPE, MUTABLE_PROPERTY_REFERENCE0)
else -> method("property0", K_PROPERTY0_TYPE, PROPERTY_REFERENCE0)
}
}
}
@JvmStatic
fun createFakeOpenDescriptor(getFunction: FunctionDescriptor, classDescriptor: ClassDescriptor): FunctionDescriptor {
val copy = getFunction.original.copy(classDescriptor, Modality.OPEN, getFunction.visibility, getFunction.kind, false)
return copy.substitute(ANY_SUBSTITUTOR)!!
}
@JvmStatic
fun findGetFunction(localVariableDescriptorForReference: VariableDescriptor) =
localVariableDescriptorForReference.type.memberScope.getContributedFunctions(
OperatorNameConventions.GET,
NoLookupLocation.FROM_BACKEND
).single()
}
class PropertyReferenceGenerationStrategy(
val isGetter: Boolean,
private val originalFunctionDesc: FunctionDescriptor,
val target: VariableDescriptor,
val asmType: Type,
val receiverType: Type?,
val expression: KtElement,
state: GenerationState,
private val isInliningStrategy: Boolean
) :
FunctionGenerationStrategy.CodegenBased(state) {
override fun doGenerateBody(codegen: ExpressionCodegen, signature: JvmMethodSignature) {
val v = codegen.v
val typeMapper = state.typeMapper
if (target is PropertyImportedFromObject) {
val containingObject = target.containingObject
StackValue
.singleton(containingObject, typeMapper)
.put(typeMapper.mapClass(containingObject), containingObject.defaultType, v)
}
if (receiverType != null) {
val expectedReceiver =
target.extensionReceiverParameter?.type ?: (target.containingDeclaration as? ClassDescriptor)?.defaultType
val expectedReceiverType = if (expectedReceiver != null) typeMapper.mapType(expectedReceiver) else receiverType
capturedBoundReferenceReceiver(asmType, expectedReceiverType, isInliningStrategy).put(expectedReceiverType, v)
} else {
val receivers = originalFunctionDesc.valueParameters.dropLast(if (isGetter) 0 else 1)
receivers.forEachIndexed { i, valueParameterDescriptor ->
StackValue.local(i + 1, OBJECT_TYPE).put(typeMapper.mapType(valueParameterDescriptor), valueParameterDescriptor.type, v)
}
}
val value = if (target is LocalVariableDescriptor) {
codegen.findLocalOrCapturedValue(target)!!
} else {
codegen.intermediateValueForProperty(target as PropertyDescriptor, false, null, StackValue.none())
}
codegen.markStartLineNumber(expression)
val type = target.type
if (isGetter) {
value.put(OBJECT_TYPE, type, v)
} else {
val functionDescriptor = codegen.context.functionDescriptor
value.store(StackValue.local(codegen.frameMap.getIndex(functionDescriptor.valueParameters.last()), OBJECT_TYPE, type), v)
}
v.areturn(signature.returnType)
}
}
}
