Do not rely on descriptors in KTypeParameterImpl.equals/hashCode

Descriptors are cached via weak references in moduleByClassLoader.kt and
can be garbage-collected at any point. So relying on identity of
descriptors in KTypeParameterImpl is dangerous because the same type
parameter can be represented by different descriptors. For example, the
test equalsOnFunctionParameters.kt was flaky before this change because
of this issue, and that could be reproduced by running it a few hundred
times in the same process.

Instead, use the type parameter's container (which is either KClass or
KCallable) and name, in equals/hashCode. KClass and KCallable already
have equals/hashCode independent of descriptors, so this works in case
the descriptor is invalidated.

compiler/fir/fir2ir/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java

@@ -26192,6 +26192,11 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
                 runTest("compiler/testData/codegen/box/reflection/methodsFromAny/typeParametersEqualsHashCode.kt");
             }
 
+            @TestMetadata("typeParametersEqualsWithClearCaches.kt")
+            public void testTypeParametersEqualsWithClearCaches() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/methodsFromAny/typeParametersEqualsWithClearCaches.kt");
+            }
+
             @TestMetadata("typeParametersToString.kt")
             public void testTypeParametersToString() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/methodsFromAny/typeParametersToString.kt");
@@ -27078,6 +27083,16 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
                 runTest("compiler/testData/codegen/box/reflection/typeParameters/declarationSiteVariance.kt");
             }
 
+            @TestMetadata("innerGenericParameter.kt")
+            public void testInnerGenericParameter() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/typeParameters/innerGenericParameter.kt");
+            }
+
+            @TestMetadata("javaGenericTypeConstructor.kt")
+            public void testJavaGenericTypeConstructor() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/typeParameters/javaGenericTypeConstructor.kt");
+            }
+
             @TestMetadata("typeParametersAndNames.kt")
             public void testTypeParametersAndNames() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/typeParameters/typeParametersAndNames.kt");

compiler/testData/codegen/box/reflection/methodsFromAny/typeParametersEqualsWithClearCaches.kt

@@ -0,0 +1,56 @@
+// TARGET_BACKEND: JVM
+// WITH_REFLECT
+// FILE: box.kt
+
+import kotlin.test.assertEquals
+
+inline fun check(message: String, generate: () -> Any?) {
+    val x1: Any?
+    val x2: Any?
+    try {
+        x1 = generate()
+
+        // Force clear the internal maps, as if the weak values in them are garbage-collected.
+        kotlin.reflect.jvm.internal.ReflectionFactoryImpl.clearCaches()
+
+        x2 = generate()
+    } catch (e: Throwable) {
+        throw AssertionError("Fail $message", e)
+    }
+
+    assertEquals(x1, x2, "Fail equals $message")
+    assertEquals(x2, x1, "Fail equals $message")
+    assertEquals(x1.hashCode(), x2.hashCode(), "Fail hashCode $message")
+}
+
+class C<T> {
+    fun <V> v(): V? = null
+    fun t(): T? = null
+    val <U> U.u: U get() = this
+}
+
+fun <W> W.w() {}
+val <X> X.x: X get() = this
+
+fun box(): String {
+    check("T from C's typeParameters") { C::class.typeParameters.single() }
+    check("V from v's typeParameters") { C::class.members.single { it.name == "v" }.typeParameters.single() }
+
+    check("V from v's returnType") { C::class.members.single { it.name == "v" }.returnType.classifier }
+    check("T from t's returnType") { C::class.members.single { it.name == "t" }.returnType.classifier }
+    check("U from u's parameter type") { C::class.members.single { it.name == "u" }.parameters[1].type.classifier }
+
+    check("W from w's parameter type") { Any::w.parameters.single().type.classifier }
+    check("X from x's parameter type") { Any::x.parameters.single().type.classifier }
+
+    check("Z from J's typeParameters") { J::class.typeParameters.single() }
+    check("Z from z's returnType") { J::class.members.single { it.name == "z" }.returnType.classifier }
+
+    return "OK"
+}
+
+// FILE: J.java
+
+public interface J<Z> {
+    Z z();
+}

compiler/testData/codegen/box/reflection/typeParameters/innerGenericParameter.kt

@@ -0,0 +1,28 @@
+// TARGET_BACKEND: JVM
+// WITH_REFLECT
+
+import kotlin.reflect.KVariance
+import kotlin.test.assertEquals
+
+class A<out T> {
+    inner class B<in U> {
+        fun test(u: U): T? = null
+    }
+}
+
+fun box(): String {
+    val fn = A.B::class.members.single { it.name == "test" }
+
+    val t = A::class.typeParameters.single()
+    val u = A.B::class.typeParameters.single()
+
+    assertEquals("T", t.name)
+    assertEquals(KVariance.OUT, t.variance)
+    assertEquals("U", u.name)
+    assertEquals(KVariance.IN, u.variance)
+
+    assertEquals(t, fn.returnType.classifier)
+    assertEquals(u, fn.parameters[1].type.classifier)
+
+    return "OK"
+}

compiler/testData/codegen/box/reflection/typeParameters/javaGenericTypeConstructor.kt

@@ -0,0 +1,30 @@
+// TARGET_BACKEND: JVM
+// WITH_REFLECT
+// FILE: test.kt
+
+import kotlin.reflect.KVariance
+import kotlin.test.assertEquals
+
+fun box(): String {
+    val ctor = J::class.constructors.single()
+    val ab = ctor.typeParameters
+    assertEquals(2, ab.size, ab.toString())
+
+    assertEquals("A", ab[0].name)
+    assertEquals(KVariance.INVARIANT, ab[0].variance)
+    assertEquals("B", ab[1].name)
+    assertEquals(KVariance.INVARIANT, ab[1].variance)
+
+    // TODO: currently fails with "AssertionError: Expected <A>, actual <A>"
+    // assertEquals(ab[0], ctor.parameters[0].type.classifier)
+
+    assertEquals(ab[1], ctor.parameters[1].type.classifier)
+
+    return "OK"
+}
+
+// FILE: J.java
+
+public class J<A> {
+    public <B> J(A a, B b) {}
+}

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java

@@ -27778,6 +27778,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                 runTest("compiler/testData/codegen/box/reflection/methodsFromAny/typeParametersEqualsHashCode.kt");
             }
 
+            @TestMetadata("typeParametersEqualsWithClearCaches.kt")
+            public void testTypeParametersEqualsWithClearCaches() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/methodsFromAny/typeParametersEqualsWithClearCaches.kt");
+            }
+
             @TestMetadata("typeParametersToString.kt")
             public void testTypeParametersToString() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/methodsFromAny/typeParametersToString.kt");
@@ -28664,6 +28669,16 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                 runTest("compiler/testData/codegen/box/reflection/typeParameters/declarationSiteVariance.kt");
             }
 
+            @TestMetadata("innerGenericParameter.kt")
+            public void testInnerGenericParameter() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/typeParameters/innerGenericParameter.kt");
+            }
+
+            @TestMetadata("javaGenericTypeConstructor.kt")
+            public void testJavaGenericTypeConstructor() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/typeParameters/javaGenericTypeConstructor.kt");
+            }
+
             @TestMetadata("typeParametersAndNames.kt")
             public void testTypeParametersAndNames() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/typeParameters/typeParametersAndNames.kt");

compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -25412,6 +25412,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                 runTest("compiler/testData/codegen/box/reflection/methodsFromAny/typeParametersEqualsHashCode.kt");
             }
 
+            @TestMetadata("typeParametersEqualsWithClearCaches.kt")
+            public void testTypeParametersEqualsWithClearCaches() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/methodsFromAny/typeParametersEqualsWithClearCaches.kt");
+            }
+
             @TestMetadata("typeParametersToString.kt")
             public void testTypeParametersToString() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/methodsFromAny/typeParametersToString.kt");
@@ -26298,6 +26303,16 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                 runTest("compiler/testData/codegen/box/reflection/typeParameters/declarationSiteVariance.kt");
             }
 
+            @TestMetadata("innerGenericParameter.kt")
+            public void testInnerGenericParameter() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/typeParameters/innerGenericParameter.kt");
+            }
+
+            @TestMetadata("javaGenericTypeConstructor.kt")
+            public void testJavaGenericTypeConstructor() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/typeParameters/javaGenericTypeConstructor.kt");
+            }
+
             @TestMetadata("typeParametersAndNames.kt")
             public void testTypeParametersAndNames() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/typeParameters/typeParametersAndNames.kt");

compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java

@@ -26192,6 +26192,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                 runTest("compiler/testData/codegen/box/reflection/methodsFromAny/typeParametersEqualsHashCode.kt");
             }
 
+            @TestMetadata("typeParametersEqualsWithClearCaches.kt")
+            public void testTypeParametersEqualsWithClearCaches() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/methodsFromAny/typeParametersEqualsWithClearCaches.kt");
+            }
+
             @TestMetadata("typeParametersToString.kt")
             public void testTypeParametersToString() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/methodsFromAny/typeParametersToString.kt");
@@ -27078,6 +27083,16 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                 runTest("compiler/testData/codegen/box/reflection/typeParameters/declarationSiteVariance.kt");
             }
 
+            @TestMetadata("innerGenericParameter.kt")
+            public void testInnerGenericParameter() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/typeParameters/innerGenericParameter.kt");
+            }
+
+            @TestMetadata("javaGenericTypeConstructor.kt")
+            public void testJavaGenericTypeConstructor() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/typeParameters/javaGenericTypeConstructor.kt");
+            }
+
             @TestMetadata("typeParametersAndNames.kt")
             public void testTypeParametersAndNames() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/typeParameters/typeParametersAndNames.kt");

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KCallableImpl.kt

@@ -20,7 +20,7 @@ import kotlin.reflect.jvm.internal.calls.Caller
 import kotlin.reflect.jvm.javaType
 import kotlin.reflect.jvm.jvmErasure
 
-internal abstract class KCallableImpl<out R> : KCallable<R> {
+internal abstract class KCallableImpl<out R> : KCallable<R>, KTypeParameterOwnerImpl {
     abstract val descriptor: CallableMemberDescriptor
 
     // The instance which is used to perform a positional call, i.e. `call`
@@ -82,7 +82,7 @@ internal abstract class KCallableImpl<out R> : KCallable<R> {
         get() = _returnType()
 
     private val _typeParameters = ReflectProperties.lazySoft {
-        descriptor.typeParameters.map(::KTypeParameterImpl)
+        descriptor.typeParameters.map { descriptor -> KTypeParameterImpl(this, descriptor) }
     }
 
     override val typeParameters: List<KTypeParameter>

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KClassImpl.kt

@@ -40,7 +40,9 @@ import org.jetbrains.kotlin.descriptors.runtime.components.ReflectKotlinClass
 import org.jetbrains.kotlin.descriptors.runtime.structure.functionClassArity
 import org.jetbrains.kotlin.descriptors.runtime.structure.wrapperByPrimitive
 
-internal class KClassImpl<T : Any>(override val jClass: Class<T>) : KDeclarationContainerImpl(), KClass<T>, KClassifierImpl {
+internal class KClassImpl<T : Any>(
+    override val jClass: Class<T>
+) : KDeclarationContainerImpl(), KClass<T>, KClassifierImpl, KTypeParameterOwnerImpl {
     inner class Data : KDeclarationContainerImpl.Data() {
         val descriptor: ClassDescriptor by ReflectProperties.lazySoft {
             val classId = classId
@@ -115,7 +117,7 @@ internal class KClassImpl<T : Any>(override val jClass: Class<T>) : KDeclaration
         }
 
         val typeParameters: List<KTypeParameter> by ReflectProperties.lazySoft {
-            descriptor.declaredTypeParameters.map(::KTypeParameterImpl)
+            descriptor.declaredTypeParameters.map { descriptor -> KTypeParameterImpl(this@KClassImpl, descriptor) }
         }
 
         val supertypes: List<KType> by ReflectProperties.lazySoft {

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KDeclarationContainerImpl.kt

@@ -17,7 +17,11 @@
 package kotlin.reflect.jvm.internal
 
 import org.jetbrains.kotlin.descriptors.*
-import org.jetbrains.kotlin.descriptors.impl.DeclarationDescriptorVisitorEmptyBodies
+import org.jetbrains.kotlin.descriptors.runtime.components.RuntimeModuleData
+import org.jetbrains.kotlin.descriptors.runtime.components.tryLoadClass
+import org.jetbrains.kotlin.descriptors.runtime.structure.createArrayType
+import org.jetbrains.kotlin.descriptors.runtime.structure.safeClassLoader
+import org.jetbrains.kotlin.descriptors.runtime.structure.wrapperByPrimitive
 import org.jetbrains.kotlin.load.java.JvmAbi
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.renderer.DescriptorRenderer
@@ -25,11 +29,6 @@ import org.jetbrains.kotlin.resolve.scopes.MemberScope
 import java.lang.reflect.Constructor
 import java.lang.reflect.Method
 import kotlin.jvm.internal.ClassBasedDeclarationContainer
-import org.jetbrains.kotlin.descriptors.runtime.components.RuntimeModuleData
-import org.jetbrains.kotlin.descriptors.runtime.components.tryLoadClass
-import org.jetbrains.kotlin.descriptors.runtime.structure.createArrayType
-import org.jetbrains.kotlin.descriptors.runtime.structure.safeClassLoader
-import org.jetbrains.kotlin.descriptors.runtime.structure.wrapperByPrimitive
 
 internal abstract class KDeclarationContainerImpl : ClassBasedDeclarationContainer {
     abstract inner class Data {
@@ -51,17 +50,10 @@ internal abstract class KDeclarationContainerImpl : ClassBasedDeclarationContain
     abstract fun getLocalProperty(index: Int): PropertyDescriptor?
 
     protected fun getMembers(scope: MemberScope, belonginess: MemberBelonginess): Collection<KCallableImpl<*>> {
-        val visitor = object : DeclarationDescriptorVisitorEmptyBodies<KCallableImpl<*>, Unit>() {
-            override fun visitPropertyDescriptor(descriptor: PropertyDescriptor, data: Unit): KCallableImpl<*> =
-                createProperty(descriptor)
-
-            override fun visitFunctionDescriptor(descriptor: FunctionDescriptor, data: Unit): KCallableImpl<*> =
-                KFunctionImpl(this@KDeclarationContainerImpl, descriptor)
-
+        val visitor = object : CreateKCallableVisitor(this) {
             override fun visitConstructorDescriptor(descriptor: ConstructorDescriptor, data: Unit): KCallableImpl<*> =
-                throw IllegalStateException("No constructors should appear in this scope: $descriptor")
+                throw IllegalStateException("No constructors should appear here: $descriptor")
         }
-
         return scope.getContributedDescriptors().mapNotNull { descriptor ->
             if (descriptor is CallableMemberDescriptor &&
                 descriptor.visibility != Visibilities.INVISIBLE_FAKE &&
@@ -78,26 +70,6 @@ internal abstract class KDeclarationContainerImpl : ClassBasedDeclarationContain
             member.kind.isReal == (this == DECLARED)
     }
 
-    private fun createProperty(descriptor: PropertyDescriptor): KPropertyImpl<*> {
-        val receiverCount = (descriptor.dispatchReceiverParameter?.let { 1 } ?: 0) +
-                (descriptor.extensionReceiverParameter?.let { 1 } ?: 0)
-
-        when {
-            descriptor.isVar -> when (receiverCount) {
-                0 -> return KMutableProperty0Impl<Any?>(this, descriptor)
-                1 -> return KMutableProperty1Impl<Any?, Any?>(this, descriptor)
-                2 -> return KMutableProperty2Impl<Any?, Any?, Any?>(this, descriptor)
-            }
-            else -> when (receiverCount) {
-                0 -> return KProperty0Impl<Any?>(this, descriptor)
-                1 -> return KProperty1Impl<Any?, Any?>(this, descriptor)
-                2 -> return KProperty2Impl<Any?, Any?, Any?>(this, descriptor)
-            }
-        }
-
-        throw KotlinReflectionInternalError("Unsupported property: $descriptor")
-    }
-
     fun findPropertyDescriptor(name: String, signature: String): PropertyDescriptor {
         val match = LOCAL_PROPERTY_SIGNATURE.matchEntire(signature)
         if (match != null) {

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KTypeImpl.kt

@@ -63,7 +63,7 @@ internal class KTypeImpl(
 
                 return KClassImpl(jClass)
             }
-            is TypeParameterDescriptor -> return KTypeParameterImpl(descriptor)
+            is TypeParameterDescriptor -> return KTypeParameterImpl(null, descriptor)
             is TypeAliasDescriptor -> TODO("Type alias classifiers are not yet supported")
             else -> return null
         }

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KTypeParameterImpl.kt

@@ -16,14 +16,23 @@
 
 package kotlin.reflect.jvm.internal
 
+import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
+import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.TypeParameterDescriptor
+import org.jetbrains.kotlin.descriptors.runtime.components.ReflectKotlinClass
+import org.jetbrains.kotlin.load.kotlin.JvmPackagePartSource
+import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedMemberDescriptor
 import org.jetbrains.kotlin.types.Variance
+import org.jetbrains.kotlin.utils.addToStdlib.safeAs
 import kotlin.jvm.internal.TypeParameterReference
 import kotlin.reflect.KType
 import kotlin.reflect.KTypeParameter
 import kotlin.reflect.KVariance
 
-internal class KTypeParameterImpl(override val descriptor: TypeParameterDescriptor) : KTypeParameter, KClassifierImpl {
+internal class KTypeParameterImpl(
+    container: KTypeParameterOwnerImpl?,
+    override val descriptor: TypeParameterDescriptor,
+) : KTypeParameter, KClassifierImpl {
     override val name: String
         get() = descriptor.name.asString()
 
@@ -45,11 +54,41 @@ internal class KTypeParameterImpl(override val descriptor: TypeParameterDescript
     override val isReified: Boolean
         get() = descriptor.isReified
 
+    private val container: KTypeParameterOwnerImpl = container ?: run {
+        when (val declaration = descriptor.containingDeclaration) {
+            is ClassDescriptor -> {
+                declaration.toKClassImpl()
+            }
+            is CallableMemberDescriptor -> {
+                val callableContainerClass = when (val callableContainer = declaration.containingDeclaration) {
+                    is ClassDescriptor -> {
+                        callableContainer.toKClassImpl()
+                    }
+                    else -> {
+                        val deserializedMember = declaration as? DeserializedMemberDescriptor
+                            ?: throw KotlinReflectionInternalError("Non-class callable descriptor must be deserialized: $declaration")
+                        deserializedMember.getContainerClass().kotlin as KClassImpl<*>
+                    }
+                }
+                declaration.accept(CreateKCallableVisitor(callableContainerClass), Unit)
+            }
+            else -> throw KotlinReflectionInternalError("Unknown type parameter container: $declaration")
+        }
+    }
+
+    private fun ClassDescriptor.toKClassImpl(): KClassImpl<*> =
+        toJavaClass()?.kotlin as KClassImpl<*>?
+            ?: throw KotlinReflectionInternalError("Type parameter container is not resolved: $containingDeclaration")
+
+    private fun DeserializedMemberDescriptor.getContainerClass(): Class<*> =
+        containerSource.safeAs<JvmPackagePartSource>()?.knownJvmBinaryClass.safeAs<ReflectKotlinClass>()?.klass
+            ?: throw KotlinReflectionInternalError("Container of deserialized member is not resolved: $this")
+
     override fun equals(other: Any?) =
-        other is KTypeParameterImpl && descriptor == other.descriptor
+        other is KTypeParameterImpl && container == other.container && name == other.name
 
     override fun hashCode() =
-        descriptor.hashCode()
+        container.hashCode() * 31 + name.hashCode()
 
     override fun toString() =
         TypeParameterReference.toString(this)

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KTypeParameterOwnerImpl.kt

@@ -0,0 +1,12 @@
+/*
+ * Copyright 2010-2020 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 kotlin.reflect.jvm.internal
+
+import kotlin.reflect.KTypeParameter
+
+interface KTypeParameterOwnerImpl {
+    val typeParameters: List<KTypeParameter>
+}

core/reflection.jvm/src/kotlin/reflect/jvm/internal/util.kt

@@ -20,6 +20,14 @@ import org.jetbrains.kotlin.builtins.jvm.JavaToKotlinClassMap
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.descriptors.annotations.Annotated
 import org.jetbrains.kotlin.descriptors.annotations.AnnotationDescriptor
+import org.jetbrains.kotlin.descriptors.impl.DeclarationDescriptorVisitorEmptyBodies
+import org.jetbrains.kotlin.descriptors.runtime.components.ReflectAnnotationSource
+import org.jetbrains.kotlin.descriptors.runtime.components.ReflectKotlinClass
+import org.jetbrains.kotlin.descriptors.runtime.components.RuntimeSourceElementFactory
+import org.jetbrains.kotlin.descriptors.runtime.components.tryLoadClass
+import org.jetbrains.kotlin.descriptors.runtime.structure.ReflectJavaAnnotation
+import org.jetbrains.kotlin.descriptors.runtime.structure.ReflectJavaClass
+import org.jetbrains.kotlin.descriptors.runtime.structure.safeClassLoader
 import org.jetbrains.kotlin.load.kotlin.KotlinJvmBinarySourceElement
 import org.jetbrains.kotlin.metadata.ProtoBuf
 import org.jetbrains.kotlin.metadata.deserialization.BinaryVersion
@@ -32,23 +40,16 @@ import org.jetbrains.kotlin.protobuf.MessageLite
 import org.jetbrains.kotlin.resolve.constants.*
 import org.jetbrains.kotlin.resolve.descriptorUtil.annotationClass
 import org.jetbrains.kotlin.resolve.descriptorUtil.classId
+import org.jetbrains.kotlin.resolve.isInlineClassType
 import org.jetbrains.kotlin.serialization.deserialization.DeserializationContext
 import org.jetbrains.kotlin.serialization.deserialization.MemberDeserializer
+import java.lang.reflect.Type
 import kotlin.jvm.internal.FunctionReference
 import kotlin.jvm.internal.PropertyReference
+import kotlin.reflect.KType
 import kotlin.reflect.KVisibility
 import kotlin.reflect.full.IllegalCallableAccessException
 import kotlin.reflect.jvm.internal.calls.createAnnotationInstance
-import org.jetbrains.kotlin.descriptors.runtime.components.ReflectAnnotationSource
-import org.jetbrains.kotlin.descriptors.runtime.components.ReflectKotlinClass
-import org.jetbrains.kotlin.descriptors.runtime.components.RuntimeSourceElementFactory
-import org.jetbrains.kotlin.descriptors.runtime.components.tryLoadClass
-import org.jetbrains.kotlin.descriptors.runtime.structure.ReflectJavaAnnotation
-import org.jetbrains.kotlin.descriptors.runtime.structure.ReflectJavaClass
-import org.jetbrains.kotlin.descriptors.runtime.structure.safeClassLoader
-import org.jetbrains.kotlin.resolve.isInlineClassType
-import java.lang.reflect.Type
-import kotlin.reflect.KType
 
 internal val JVM_STATIC = FqName("kotlin.jvm.JvmStatic")
 
@@ -217,3 +218,29 @@ internal fun defaultPrimitiveValue(type: Type): Any? =
             else -> throw UnsupportedOperationException("Unknown primitive: $type")
         }
     } else null
+
+internal open class CreateKCallableVisitor(private val container: KDeclarationContainerImpl) :
+    DeclarationDescriptorVisitorEmptyBodies<KCallableImpl<*>, Unit>() {
+    override fun visitPropertyDescriptor(descriptor: PropertyDescriptor, data: Unit): KCallableImpl<*> {
+        val receiverCount = (descriptor.dispatchReceiverParameter?.let { 1 } ?: 0) +
+                (descriptor.extensionReceiverParameter?.let { 1 } ?: 0)
+
+        when {
+            descriptor.isVar -> when (receiverCount) {
+                0 -> return KMutableProperty0Impl<Any?>(container, descriptor)
+                1 -> return KMutableProperty1Impl<Any?, Any?>(container, descriptor)
+                2 -> return KMutableProperty2Impl<Any?, Any?, Any?>(container, descriptor)
+            }
+            else -> when (receiverCount) {
+                0 -> return KProperty0Impl<Any?>(container, descriptor)
+                1 -> return KProperty1Impl<Any?, Any?>(container, descriptor)
+                2 -> return KProperty2Impl<Any?, Any?, Any?>(container, descriptor)
+            }
+        }
+
+        throw KotlinReflectionInternalError("Unsupported property: $descriptor")
+    }
+
+    override fun visitFunctionDescriptor(descriptor: FunctionDescriptor, data: Unit): KCallableImpl<*> =
+        KFunctionImpl(container, descriptor)
+}