[FIR] Add SYNCHRONIZED_* diagnostics

compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/diagnostics/FirJvmDiagnosticsList.kt

@@ -21,6 +21,9 @@ object JVM_DIAGNOSTICS_LIST : DiagnosticList("FirJvmErrors") {
         val STRICTFP_ON_CLASS by error<KtAnnotationEntry>()
         val VOLATILE_ON_VALUE by error<KtAnnotationEntry>()
         val VOLATILE_ON_DELEGATE by error<KtAnnotationEntry>()
+        val SYNCHRONIZED_ON_ABSTRACT by error<KtAnnotationEntry>()
+        val SYNCHRONIZED_IN_INTERFACE by error<KtAnnotationEntry>()
+        val SYNCHRONIZED_ON_INLINE by warning<KtAnnotationEntry>()
     }
 
     val TYPES by object : DiagnosticGroup("Types") {

compiler/fir/checkers/checkers.jvm/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/jvm/FirJvmErrors.kt

@@ -22,6 +22,9 @@ object FirJvmErrors {
     val STRICTFP_ON_CLASS by error0<KtAnnotationEntry>()
     val VOLATILE_ON_VALUE by error0<KtAnnotationEntry>()
     val VOLATILE_ON_DELEGATE by error0<KtAnnotationEntry>()
+    val SYNCHRONIZED_ON_ABSTRACT by error0<KtAnnotationEntry>()
+    val SYNCHRONIZED_IN_INTERFACE by error0<KtAnnotationEntry>()
+    val SYNCHRONIZED_ON_INLINE by warning0<KtAnnotationEntry>()
 
     // Types
     val JAVA_TYPE_MISMATCH by error2<KtExpression, ConeKotlinType, ConeKotlinType>()

compiler/fir/checkers/checkers.jvm/src/org/jetbrains/kotlin/fir/analysis/jvm/checkers/JvmDeclarationCheckers.kt

@@ -5,12 +5,10 @@
 
 package org.jetbrains.kotlin.fir.analysis.jvm.checkers
 
-import org.jetbrains.kotlin.fir.analysis.checkers.declaration.DeclarationCheckers
+import org.jetbrains.kotlin.fir.analysis.checkers.declaration.*
-import org.jetbrains.kotlin.fir.analysis.checkers.declaration.FirBasicDeclarationChecker
-import org.jetbrains.kotlin.fir.analysis.checkers.declaration.FirClassChecker
-import org.jetbrains.kotlin.fir.analysis.checkers.declaration.FirPropertyChecker
 import org.jetbrains.kotlin.fir.analysis.jvm.checkers.declaration.FirJvmExternalDeclarationChecker
 import org.jetbrains.kotlin.fir.analysis.jvm.checkers.declaration.FirStrictfpApplicabilityChecker
+import org.jetbrains.kotlin.fir.analysis.jvm.checkers.declaration.FirSynchronizedAnnotationChecker
 import org.jetbrains.kotlin.fir.analysis.jvm.checkers.declaration.FirVolatileAnnotationChecker
 
 object JvmDeclarationCheckers : DeclarationCheckers() {
@@ -28,4 +26,9 @@ object JvmDeclarationCheckers : DeclarationCheckers() {
         get() = setOf(
             FirVolatileAnnotationChecker,
         )
+
+    override val functionCheckers: Set<FirFunctionChecker>
+        get() = setOf(
+            FirSynchronizedAnnotationChecker,
+        )
 }

compiler/fir/checkers/checkers.jvm/src/org/jetbrains/kotlin/fir/analysis/jvm/checkers/declaration/FirSynchronizedAnnotationChecker.kt

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2010-2021 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.fir.analysis.jvm.checkers.declaration
+
+import org.jetbrains.kotlin.descriptors.ClassKind
+import org.jetbrains.kotlin.fir.analysis.checkers.classKind
+import org.jetbrains.kotlin.fir.analysis.checkers.context.CheckerContext
+import org.jetbrains.kotlin.fir.analysis.checkers.declaration.FirFunctionChecker
+import org.jetbrains.kotlin.fir.analysis.checkers.getContainingClassSymbol
+import org.jetbrains.kotlin.fir.analysis.diagnostics.DiagnosticReporter
+import org.jetbrains.kotlin.fir.analysis.diagnostics.jvm.FirJvmErrors
+import org.jetbrains.kotlin.fir.analysis.diagnostics.reportOn
+import org.jetbrains.kotlin.fir.declarations.FirFunction
+import org.jetbrains.kotlin.fir.declarations.getAnnotationByFqName
+import org.jetbrains.kotlin.fir.declarations.utils.isAbstract
+import org.jetbrains.kotlin.fir.declarations.utils.isInline
+import org.jetbrains.kotlin.name.FqName
+
+object FirSynchronizedAnnotationChecker : FirFunctionChecker() {
+
+    private val SYNCHRONIZED_ANNOTATION_FQ_NAME = FqName("kotlin.jvm.Synchronized")
+
+    override fun check(declaration: FirFunction, context: CheckerContext, reporter: DiagnosticReporter) {
+        val annotation = declaration.getAnnotationByFqName(SYNCHRONIZED_ANNOTATION_FQ_NAME) ?: return
+
+        if (declaration.isInline) {
+            reporter.reportOn(annotation.source, FirJvmErrors.SYNCHRONIZED_ON_INLINE, context)
+            return
+        }
+
+        val containingClass = declaration.getContainingClassSymbol(context.session) ?: return
+        if (containingClass.classKind == ClassKind.INTERFACE) {
+            reporter.reportOn(annotation.source, FirJvmErrors.SYNCHRONIZED_IN_INTERFACE, context)
+        } else if (declaration.isAbstract) {
+            reporter.reportOn(annotation.source, FirJvmErrors.SYNCHRONIZED_ON_ABSTRACT, context)
+        }
+    }
+}

compiler/testData/diagnostics/testsWithStdLib/annotations/Synchronized.fir.kt

@@ -1,31 +0,0 @@
-import kotlin.jvm.Synchronized
-
-interface My {
-    @Synchronized fun foo()
-
-    @Synchronized fun bar() = 1
-
-    @Synchronized fun baz(): String {
-        return "abc"
-    }
-
-    var v: String
-        @Synchronized get() = ""
-        @Synchronized set(value) {}
-}
-
-abstract class Your {
-    @Synchronized abstract fun foo()
-
-    @Synchronized fun bar() = 1
-
-    @Synchronized open fun baz(): String {
-        return "xyz"
-    }
-
-    var v: String
-        @Synchronized get() = ""
-        @Synchronized set(value) {}
-}
-
-@Synchronized fun gav() = 1

compiler/testData/diagnostics/testsWithStdLib/annotations/Synchronized.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 import kotlin.jvm.Synchronized
 
 interface My {

compiler/testData/diagnostics/testsWithStdLib/inline/synchronizedOnInline.fir.kt

@@ -1,16 +0,0 @@
-// !DIAGNOSTICS: -UNUSED_PARAMETER
-
-@Synchronized
-inline fun foo(f: () -> Unit): Unit = f()
-
-var bar: String
-    @Synchronized
-    inline get() = ""
-    @Synchronized
-    inline set(value) {}
-
-inline var baz: String
-    @Synchronized
-    get() = ""
-    @Synchronized
-    set(value) {}

compiler/testData/diagnostics/testsWithStdLib/inline/synchronizedOnInline.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 <!SYNCHRONIZED_ON_INLINE!>@Synchronized<!>

idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDataClassConverters.kt

@@ -3457,6 +3457,24 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
             token,
         )
     }
+    add(FirJvmErrors.SYNCHRONIZED_ON_ABSTRACT) { firDiagnostic ->
+        SynchronizedOnAbstractImpl(
+            firDiagnostic as FirPsiDiagnostic,
+            token,
+        )
+    }
+    add(FirJvmErrors.SYNCHRONIZED_IN_INTERFACE) { firDiagnostic ->
+        SynchronizedInInterfaceImpl(
+            firDiagnostic as FirPsiDiagnostic,
+            token,
+        )
+    }
+    add(FirJvmErrors.SYNCHRONIZED_ON_INLINE) { firDiagnostic ->
+        SynchronizedOnInlineImpl(
+            firDiagnostic as FirPsiDiagnostic,
+            token,
+        )
+    }
     add(FirJvmErrors.JAVA_TYPE_MISMATCH) { firDiagnostic ->
         JavaTypeMismatchImpl(
             firSymbolBuilder.typeBuilder.buildKtType(firDiagnostic.a),

idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnostics.kt

@@ -2410,6 +2410,18 @@ sealed class KtFirDiagnostic<PSI : PsiElement> : KtDiagnosticWithPsi<PSI> {
         override val diagnosticClass get() = VolatileOnDelegate::class
     }
 
+    abstract class SynchronizedOnAbstract : KtFirDiagnostic<KtAnnotationEntry>() {
+        override val diagnosticClass get() = SynchronizedOnAbstract::class
+    }
+
+    abstract class SynchronizedInInterface : KtFirDiagnostic<KtAnnotationEntry>() {
+        override val diagnosticClass get() = SynchronizedInInterface::class
+    }
+
+    abstract class SynchronizedOnInline : KtFirDiagnostic<KtAnnotationEntry>() {
+        override val diagnosticClass get() = SynchronizedOnInline::class
+    }
+
     abstract class JavaTypeMismatch : KtFirDiagnostic<KtExpression>() {
         override val diagnosticClass get() = JavaTypeMismatch::class
         abstract val expectedType: KtType

idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnosticsImpl.kt

@@ -3899,6 +3899,27 @@ internal class VolatileOnDelegateImpl(
     override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
 }
 
+internal class SynchronizedOnAbstractImpl(
+    firDiagnostic: FirPsiDiagnostic,
+    override val token: ValidityToken,
+) : KtFirDiagnostic.SynchronizedOnAbstract(), KtAbstractFirDiagnostic<KtAnnotationEntry> {
+    override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
+}
+
+internal class SynchronizedInInterfaceImpl(
+    firDiagnostic: FirPsiDiagnostic,
+    override val token: ValidityToken,
+) : KtFirDiagnostic.SynchronizedInInterface(), KtAbstractFirDiagnostic<KtAnnotationEntry> {
+    override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
+}
+
+internal class SynchronizedOnInlineImpl(
+    firDiagnostic: FirPsiDiagnostic,
+    override val token: ValidityToken,
+) : KtFirDiagnostic.SynchronizedOnInline(), KtAbstractFirDiagnostic<KtAnnotationEntry> {
+    override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
+}
+
 internal class JavaTypeMismatchImpl(
     override val expectedType: KtType,
     override val actualType: KtType,