[K/N] Mark UnhandledExceptionHook-related API as experimental

As a part of efforts to stabilize Native stdlib.

kotlin-native/backend.native/tests/interop/exceptions/exceptionHook.kt

@@ -1,4 +1,4 @@
-@file:OptIn(FreezingIsDeprecated::class)
+@file:OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class)
 
 import kotlin.native.concurrent.freeze
 

kotlin-native/backend.native/tests/produce_dynamic/simple/hello.kt

@@ -4,7 +4,7 @@
  */
 
 // FILE: hello.kt
-@file:OptIn(FreezingIsDeprecated::class)
+@file:OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class)
 
 import kotlinx.cinterop.*
 

kotlin-native/backend.native/tests/produce_dynamic/unhandledException/unhandled.kt

@@ -2,7 +2,7 @@
  * 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.
  */
-@file:OptIn(FreezingIsDeprecated::class)
+@file:OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class)
 
 import kotlin.native.concurrent.*
 import kotlin.native.internal.*

kotlin-native/backend.native/tests/runtime/exceptions/custom_hook.kt

@@ -2,7 +2,7 @@
  * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
  * that can be found in the LICENSE file.
  */
-@file:OptIn(FreezingIsDeprecated::class)
+@file:OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class)
 
 import kotlin.test.*
 

kotlin-native/backend.native/tests/runtime/exceptions/custom_hook_memory_leak.kt

@@ -2,7 +2,7 @@
  * Copyright 2010-2021 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
  * that can be found in the LICENSE file.
  */
-@file:OptIn(FreezingIsDeprecated::class)
+@file:OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class)
 
 import kotlin.test.*
 

kotlin-native/backend.native/tests/runtime/exceptions/custom_hook_throws.kt

@@ -2,7 +2,7 @@
  * Copyright 2010-2021 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
  * that can be found in the LICENSE file.
  */
-@file:OptIn(FreezingIsDeprecated::class)
+@file:OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class)
 
 import kotlin.test.*
 

kotlin-native/backend.native/tests/runtime/workers/worker_exceptions_terminate_hook.kt

@@ -1,4 +1,4 @@
-@file:OptIn(FreezingIsDeprecated::class)
+@file:OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class)
 
 import kotlin.native.concurrent.*
 

kotlin-native/backend.native/tests/runtime/workers/worker_exceptions_terminate_hook_current.kt

@@ -1,4 +1,4 @@
-@file:OptIn(FreezingIsDeprecated::class)
+@file:OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class)
 
 import kotlin.native.concurrent.*
 

kotlin-native/runtime/src/main/kotlin/kotlin/native/Runtime.kt

@@ -40,6 +40,7 @@ public class IncorrectDereferenceException : RuntimeException {
 /**
  * Typealias describing custom exception reporting hook.
  */
+@ExperimentalStdlibApi
 public typealias ReportUnhandledExceptionHook = Function1<Throwable, Unit>
 
 /**
@@ -55,6 +56,7 @@ public typealias ReportUnhandledExceptionHook = Function1<Throwable, Unit>
  * Set or default hook is also invoked by [processUnhandledException].
  * With the legacy MM the hook must be a frozen lambda so that it could be called from any thread/worker.
  */
+@ExperimentalStdlibApi
 @OptIn(FreezingIsDeprecated::class)
 public fun setUnhandledExceptionHook(hook: ReportUnhandledExceptionHook?): ReportUnhandledExceptionHook? {
     try {
@@ -66,7 +68,7 @@ public fun setUnhandledExceptionHook(hook: ReportUnhandledExceptionHook?): Repor
 
 @Suppress("CONFLICTING_OVERLOADS")
 @Deprecated("Provided for binary compatibility", level = DeprecationLevel.HIDDEN)
-@OptIn(FreezingIsDeprecated::class)
+@OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class)
 public fun setUnhandledExceptionHook(hook: ReportUnhandledExceptionHook): ReportUnhandledExceptionHook? {
     try {
         return UnhandledExceptionHookHolder.hook.swap(hook)

kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/RuntimeUtils.kt

@@ -144,7 +144,7 @@ internal fun ReportUnhandledException(throwable: Throwable) {
 // Using object to make sure that `hook` is initialized when it's needed instead of
 // in a normal global initialization flow. This is important if some global happens
 // to throw an exception during it's initialization before this hook would've been initialized.
-@OptIn(FreezingIsDeprecated::class)
+@OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class)
 internal object UnhandledExceptionHookHolder {
     internal val hook: FreezableAtomicReference<ReportUnhandledExceptionHook?> =
         if (Platform.memoryModel == MemoryModel.EXPERIMENTAL) {
@@ -157,7 +157,7 @@ internal object UnhandledExceptionHookHolder {
 // TODO: Can be removed only when native-mt coroutines stop using it.
 @PublishedApi
 @ExportForCppRuntime
-@OptIn(FreezingIsDeprecated::class)
+@OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class)
 internal fun OnUnhandledException(throwable: Throwable) {
     val handler = UnhandledExceptionHookHolder.hook.value
     if (handler == null) {
@@ -172,7 +172,7 @@ internal fun OnUnhandledException(throwable: Throwable) {
 }
 
 @ExportForCppRuntime("Kotlin_runUnhandledExceptionHook")
-@OptIn(FreezingIsDeprecated::class)
+@OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class)
 internal fun runUnhandledExceptionHook(throwable: Throwable) {
     val handler = UnhandledExceptionHookHolder.hook.value ?: throw throwable
     handler(throwable)