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org.jetbrains.kotlin.codegen.CodeFragmentCodegen.kt Maven / Gradle / Ivy
/*
* Copyright 2000-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
*/
package org.jetbrains.kotlin.codegen
import com.intellij.openapi.util.Key
import org.jetbrains.kotlin.codegen.CalculatedCodeFragmentCodegenInfo.CalculatedParameter
import org.jetbrains.kotlin.codegen.CodeFragmentCodegenInfo.IParameter
import org.jetbrains.kotlin.codegen.binding.MutableClosure
import org.jetbrains.kotlin.codegen.context.*
import org.jetbrains.kotlin.codegen.context.LocalLookup.*
import org.jetbrains.kotlin.codegen.state.GenerationState
import org.jetbrains.kotlin.codegen.state.KotlinTypeMapper
import org.jetbrains.kotlin.descriptors.*
import org.jetbrains.kotlin.descriptors.impl.LocalVariableDescriptor
import org.jetbrains.kotlin.psi.*
import org.jetbrains.kotlin.resolve.BindingContext
import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
import org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOrigin.Companion.NO_ORIGIN
import org.jetbrains.kotlin.resolve.jvm.diagnostics.OtherOrigin
import org.jetbrains.kotlin.types.KotlinType
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.kotlin.codegen.extensions.ExpressionCodegenExtension.Context as InCo
class CodeFragmentCodegenInfo(
val classDescriptor: ClassDescriptor,
val methodDescriptor: FunctionDescriptor,
val parameters: List
) {
val classType: Type = Type.getObjectType(classDescriptor.name.asString())
interface IParameter {
val targetDescriptor: DeclarationDescriptor
val targetType: KotlinType
val isLValue: Boolean
}
}
class CodeFragmentCodegen private constructor(
private val codeFragment: KtCodeFragment,
private val info: CodeFragmentCodegenInfo,
private val calculatedInfo: CalculatedCodeFragmentCodegenInfo,
private val classContext: CodeFragmentContext,
state: GenerationState,
builder: ClassBuilder
) : MemberCodegen(state, null, classContext, codeFragment, builder) {
private val methodDescriptor = info.methodDescriptor
override fun generateDeclaration() {
v.defineClass(
codeFragment,
state.classFileVersion,
ACC_PUBLIC or ACC_SUPER,
info.classType.internalName,
null,
"java/lang/Object",
emptyArray()
)
}
override fun generateBody() {
genConstructor()
val methodContext = object : MethodContext(methodDescriptor, classContext.contextKind, classContext, null, false) {
override fun getAccessorForSuperCallIfNeeded(
descriptor: D,
superCallTarget: ClassDescriptor?,
state: GenerationState
): D {
return descriptor
}
}
genMethod(methodContext)
}
override fun generateKotlinMetadataAnnotation() {
writeSyntheticClassMetadata(v, state, false)
}
private fun genConstructor() {
val mv = v.newMethod(NO_ORIGIN, ACC_PUBLIC, "", "()V", null, null)
if (state.classBuilderMode.generateBodies) {
mv.visitCode()
val iv = InstructionAdapter(mv)
iv.load(0, info.classType)
iv.invokespecial("java/lang/Object", "", "()V", false)
iv.areturn(Type.VOID_TYPE)
}
mv.visitMaxs(-1, -1)
mv.visitEnd()
}
private fun genMethod(methodContext: MethodContext) {
val returnType = calculatedInfo.returnAsmType
val parameters = calculatedInfo.parameters
val methodDesc = Type.getMethodDescriptor(returnType, *parameters.map { it.asmType }.toTypedArray())
val mv = v.newMethod(
OtherOrigin(codeFragment, methodContext.functionDescriptor),
ACC_PUBLIC or ACC_STATIC,
methodDescriptor.name.asString(), methodDesc,
null, null
)
if (state.classBuilderMode.generateBodies) {
mv.visitCode()
val frameMap = FrameMap()
parameters.forEach { frameMap.enter(it.targetDescriptor, it.asmType) }
val codegen = object : ExpressionCodegen(mv, frameMap, returnType, methodContext, state, this) {
override fun findCapturedValue(descriptor: DeclarationDescriptor): StackValue? {
val parameter = calculatedInfo.findParameter(descriptor) ?: return super.findCapturedValue(descriptor)
return parameter.stackValue
}
override fun generateThisOrOuter(calleeContainingClass: ClassDescriptor, isSuper: Boolean): StackValue {
findCapturedValue(calleeContainingClass)?.let { return it }
return super.generateThisOrOuter(calleeContainingClass, isSuper)
}
override fun generateExtensionReceiver(descriptor: CallableDescriptor): StackValue {
val receiverParameter = descriptor.extensionReceiverParameter
if (receiverParameter != null) {
findCapturedValue(receiverParameter)?.let { return it }
}
return super.generateExtensionReceiver(descriptor)
}
override fun generateNonIntrinsicSimpleNameExpression(
expression: KtSimpleNameExpression, receiver: StackValue,
descriptor: DeclarationDescriptor, resolvedCall: ResolvedCall<*>?, isSyntheticField: Boolean
): StackValue {
val resultingDescriptor = resolvedCall?.resultingDescriptor
if (resultingDescriptor != null) {
findCapturedValue(resultingDescriptor)?.let { return it }
}
return super.generateNonIntrinsicSimpleNameExpression(expression, receiver, descriptor, resolvedCall, isSyntheticField)
}
override fun visitThisExpression(expression: KtThisExpression, receiver: StackValue?): StackValue {
val instanceReference = expression.instanceReference
val target = bindingContext[BindingContext.REFERENCE_TARGET, instanceReference]
if (target != null) {
findCapturedValue(target)?.let { return it }
}
return super.visitThisExpression(expression, receiver)
}
}
codegen.gen(codeFragment.getContentElement(), returnType)
codegen.v.areturn(returnType)
parameters.asReversed().forEach { frameMap.leave(it.targetDescriptor) }
}
mv.visitMaxs(-1, -1)
mv.visitEnd()
}
companion object {
private val INFO_USERDATA_KEY = Key.create("CODE_FRAGMENT_CODEGEN_INFO")
fun setCodeFragmentInfo(codeFragment: KtCodeFragment, info: CodeFragmentCodegenInfo) {
codeFragment.putUserData(INFO_USERDATA_KEY, info)
}
fun clearCodeFragmentInfo(codeFragment: KtCodeFragment) {
codeFragment.putUserData(INFO_USERDATA_KEY, null)
}
@JvmStatic
fun getCodeFragmentInfo(codeFragment: KtCodeFragment): CodeFragmentCodegenInfo {
return codeFragment.getUserData(INFO_USERDATA_KEY) ?: error("Codegen info user data is not set")
}
@JvmStatic
fun createCodegen(
declaration: KtCodeFragment,
state: GenerationState,
parentContext: CodegenContext<*>
): CodeFragmentCodegen {
val info = getCodeFragmentInfo(declaration)
val classDescriptor = info.classDescriptor
val builder = state.factory.newVisitor(OtherOrigin(declaration, classDescriptor), info.classType, declaration.containingFile)
val calculatedInfo = calculateInfo(info, state.typeMapper)
val classContext = CodeFragmentContext(state.typeMapper, classDescriptor, parentContext, calculatedInfo)
return CodeFragmentCodegen(declaration, info, calculatedInfo, classContext, state, builder)
}
private fun calculateInfo(info: CodeFragmentCodegenInfo, typeMapper: KotlinTypeMapper): CalculatedCodeFragmentCodegenInfo {
val methodSignature = typeMapper.mapSignatureSkipGeneric(info.methodDescriptor)
require(info.parameters.size == methodSignature.valueParameters.size)
require(info.parameters.size == info.methodDescriptor.valueParameters.size)
var stackIndex = 0
val parameters = mutableListOf()
for (parameterIndex in 0 until info.parameters.size) {
val parameter = info.parameters[parameterIndex]
val asmParameter = methodSignature.valueParameters[parameterIndex]
val parameterDescriptor = info.methodDescriptor.valueParameters[parameterIndex]
val asmType: Type
val stackValue: StackValue
val sharedAsmType = getSharedTypeIfApplicable(parameter, typeMapper)
if (sharedAsmType != null) {
asmType = sharedAsmType
val unwrappedType = typeMapper.mapType(parameter.targetType)
stackValue = StackValue.shared(stackIndex, unwrappedType)
} else {
asmType = asmParameter.asmType
stackValue = StackValue.local(stackIndex, asmType)
}
val calculatedParameter = CalculatedParameter(parameter, asmType, stackValue, parameterDescriptor)
parameters += calculatedParameter
stackIndex += if (asmType == Type.DOUBLE_TYPE || asmType == Type.LONG_TYPE) 2 else 1
}
return CalculatedCodeFragmentCodegenInfo(parameters, methodSignature.returnType)
}
fun getSharedTypeIfApplicable(parameter: IParameter, typeMapper: KotlinTypeMapper): Type? {
return when (val descriptor = parameter.targetDescriptor) {
is LocalVariableDescriptor -> {
var result = typeMapper.getSharedVarType(descriptor)
if (result == null && parameter.isLValue) {
result = StackValue.sharedTypeForType(typeMapper.mapType(descriptor.type))
}
result
}
else -> null
}
}
}
}
private class CalculatedCodeFragmentCodegenInfo(val parameters: List, val returnAsmType: Type) {
class CalculatedParameter(
parameter: IParameter,
val asmType: Type,
val stackValue: StackValue,
val parameterDescriptor: ValueParameterDescriptor
) : IParameter by parameter
fun findParameter(target: DeclarationDescriptor): CalculatedParameter? {
for (parameter in parameters) {
if (parameter.targetDescriptor == target || parameter.parameterDescriptor == target) {
return parameter
}
}
return null
}
}
private class CodeFragmentContext(
typeMapper: KotlinTypeMapper,
contextDescriptor: ClassDescriptor,
parentContext: CodegenContext<*>?,
private val calculatedInfo: CalculatedCodeFragmentCodegenInfo
) : ScriptLikeContext(typeMapper, contextDescriptor, parentContext) {
private val localLookup = object : LocalLookup {
override fun isLocal(descriptor: DeclarationDescriptor?): Boolean {
return calculatedInfo.parameters.any { descriptor == it.targetDescriptor || descriptor == it.parameterDescriptor }
}
}
override fun getOuterReceiverExpression(prefix: StackValue?, thisOrOuterClass: ClassDescriptor): StackValue {
val parameter = calculatedInfo.findParameter(thisOrOuterClass)
?: throw IllegalStateException("Can not generate outer receiver value for $thisOrOuterClass")
return parameter.stackValue
}
override fun captureVariable(closure: MutableClosure, target: DeclarationDescriptor): StackValue? {
val parameter = calculatedInfo.findParameter(target) ?: return null
val parameterDescriptor = parameter.parameterDescriptor
// Value is already captured
closure.captureVariables[parameterDescriptor]?.let { return it.innerValue }
// Capture new value
val closureAsmType = typeMapper.mapType(closure.closureClass)
return LocalLookupCase.VAR.innerValue(parameterDescriptor, localLookup, state, closure, closureAsmType)
}
}
