[K/N] Move kotlin.native.internal.Debugging into kotlin.native.runtime

As a part of efforts to stabilize Native stdlib #KT-55765.

kotlin-native/backend.native/tests/build.gradle

@@ -2749,6 +2749,7 @@ standaloneTest("custom_hook") {
     }
     expectedExitStatusChecker = { it != 0 }
     source = "runtime/exceptions/custom_hook.kt"
+    flags = ['-opt-in=kotlin.native.internal.InternalForKotlinNative']
 }
 
 standaloneTest("custom_hook_memory_leak") {
@@ -4709,6 +4710,7 @@ interopTest("interop_threadStates") {
     disabled = (project.testTarget == 'wasm32') || // No interop for wasm yet.
             !isExperimentalMM // No thread state switching in the legacy MM.
     source = "interop/threadStates/threadStates.kt"
+    flags = ['-opt-in=kotlin.native.internal.InternalForKotlinNative']
     interop = "threadStates"
 }
 
@@ -4717,6 +4719,7 @@ interopTest("interop_threadStates_callbacksWithExceptions") {
             !isExperimentalMM // No thread state switching in the legacy MM.
     source = "interop/threadStates/callbacksWithExceptions.kt"
     interop = "threadStates"
+    flags = ['-opt-in=kotlin.native.internal.InternalForKotlinNative']
 }
 
 interopTest("interop_threadStates_unhandledException") {
@@ -4726,6 +4729,7 @@ interopTest("interop_threadStates_unhandledException") {
     interop = "threadStates"
     outputChecker = { it.contains("Error. Runnable state: true") }
     expectedExitStatusChecker = { it != 0 }
+    flags = ['-opt-in=kotlin.native.internal.InternalForKotlinNative']
 }
 
 interopTest("interop_threadStates_unhandledExceptionInForeignThread") {
@@ -4735,6 +4739,7 @@ interopTest("interop_threadStates_unhandledExceptionInForeignThread") {
     interop = "threadStates"
     outputChecker = { it.contains("Error. Runnable state: true") }
     expectedExitStatusChecker = { it != 0 }
+    flags = ['-opt-in=kotlin.native.internal.InternalForKotlinNative']
 }
 
 interopTest("interop_withSpaces") {
@@ -5408,6 +5413,7 @@ dynamicTest("produce_dynamic_unhandledException") {
     clangTool = "clang++"
     expectedExitStatusChecker = { it != 0 }
     outputChecker = { str -> str.startsWith("Kotlin hook: Exception. Runnable state: true") }
+    flags = ['-opt-in=kotlin.native.internal.InternalForKotlinNative']
 }
 
 dynamicTest("interop_concurrentRuntime") {

kotlin-native/backend.native/tests/interop/cpp/skia.kt

@@ -11,7 +11,7 @@ fun main() {
 
     // TODO: the test used to work with forceCheckedShutdown,
     // but it is broken now. Revisit after it is fixed.
-    // kotlin.native.internal.Debugging.forceCheckedShutdown = true
+    // kotlin.native.runtime.Debugging.forceCheckedShutdown = true
     Platform.isCleanersLeakCheckerActive = true
 
     val f = Foo()

kotlin-native/backend.native/tests/interop/leakMemoryWithRunningThread/checked.kt

@@ -1,3 +1,5 @@
+@file:OptIn(kotlin.native.runtime.NativeRuntimeApi::class)
+
 import leakMemory.*
 import kotlin.native.concurrent.*
 import kotlin.native.Platform
@@ -16,7 +18,7 @@ fun ensureInititalized() {
 
 fun main() {
     Platform.isMemoryLeakCheckerActive = true
-    kotlin.native.internal.Debugging.forceCheckedShutdown = true
+    kotlin.native.runtime.Debugging.forceCheckedShutdown = true
     assertTrue(global.value == 0)
     // Created a thread, made sure Kotlin is initialized there.
     test_RunInNewThread(staticCFunction(::ensureInititalized))

kotlin-native/backend.native/tests/interop/leakMemoryWithRunningThread/unchecked.kt

@@ -1,3 +1,5 @@
+@file:OptIn(kotlin.native.runtime.NativeRuntimeApi::class)
+
 import leakMemory.*
 import kotlin.native.concurrent.*
 import kotlin.native.Platform
@@ -16,7 +18,7 @@ fun ensureInititalized() {
 
 fun main() {
     Platform.isMemoryLeakCheckerActive = true
-    kotlin.native.internal.Debugging.forceCheckedShutdown = false
+    kotlin.native.runtime.Debugging.forceCheckedShutdown = false
     assertTrue(global.value == 0)
     // Created a thread, made sure Kotlin is initialized there.
     test_RunInNewThread(staticCFunction(::ensureInititalized))

kotlin-native/backend.native/tests/interop/objc/kt42172/main.kt

@@ -1,3 +1,5 @@
+@file:OptIn(kotlin.native.runtime.NativeRuntimeApi::class)
+
 import objclib.*
 import kotlin.native.concurrent.*
 import kotlinx.cinterop.*
@@ -19,6 +21,6 @@ fun main() {
     if (Platform.memoryModel == MemoryModel.EXPERIMENTAL) {
         // Experimental MM by default doesn't run GC neither on worker termination nor on program exit.
         // Enforce GC on program exit:
-        kotlin.native.internal.Debugging.forceCheckedShutdown = true
+        kotlin.native.runtime.Debugging.forceCheckedShutdown = true
     }
 }

kotlin-native/backend.native/tests/interop/objc/smoke.kt

@@ -11,7 +11,7 @@ import kotlin.test.*
 
 fun main(args: Array<String>) {
     // Test relies on full deinitialization at shutdown.
-    kotlin.native.internal.Debugging.forceCheckedShutdown = true
+    kotlin.native.runtime.Debugging.forceCheckedShutdown = true
     autoreleasepool {
         run()
     }

kotlin-native/backend.native/tests/interop/objc/smoke_noopgc.kt

@@ -11,7 +11,7 @@ import kotlin.test.*
 
 fun main(args: Array<String>) {
     // Test relies on full deinitialization at shutdown.
-    kotlin.native.internal.Debugging.forceCheckedShutdown = true
+    kotlin.native.runtime.Debugging.forceCheckedShutdown = true
     autoreleasepool {
         run()
     }

kotlin-native/backend.native/tests/interop/threadStates/callbacksWithExceptions.kt

@@ -3,7 +3,9 @@
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-import kotlin.native.internal.Debugging
+@file:OptIn(kotlin.native.runtime.NativeRuntimeApi::class)
+
+import kotlin.native.runtime.Debugging
 import kotlin.test.*
 import kotlinx.cinterop.staticCFunction
 import threadStates.*

kotlin-native/backend.native/tests/interop/threadStates/threadStates.kt

@@ -3,7 +3,9 @@
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-import kotlin.native.internal.Debugging
+@file:OptIn(kotlin.native.runtime.NativeRuntimeApi::class)
+
+import kotlin.native.runtime.Debugging
 import kotlin.test.*
 import kotlinx.cinterop.*
 import threadStates.*

kotlin-native/backend.native/tests/interop/threadStates/unhandledException.kt

@@ -2,10 +2,10 @@
  * 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, ExperimentalStdlibApi::class)
+@file:OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class, kotlin.native.runtime.NativeRuntimeApi::class)
 
 import kotlin.native.concurrent.*
-import kotlin.native.internal.Debugging
+import kotlin.native.runtime.Debugging
 import kotlinx.cinterop.staticCFunction
 import threadStates.*
 

kotlin-native/backend.native/tests/interop/threadStates/unhandledExceptionInForeignThread.kt

@@ -2,10 +2,10 @@
  * 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, ExperimentalStdlibApi::class)
+@file:OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class, kotlin.native.runtime.NativeRuntimeApi::class)
 
 import kotlin.native.concurrent.*
-import kotlin.native.internal.Debugging
+import kotlin.native.runtime.Debugging
 import kotlinx.cinterop.staticCFunction
 import threadStates.*
 

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

@@ -2,10 +2,11 @@
  * 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, ExperimentalStdlibApi::class)
+@file:OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class, kotlin.native.runtime.NativeRuntimeApi::class)
 
 import kotlin.native.concurrent.*
 import kotlin.native.internal.*
+import kotlin.native.runtime.Debugging
 
 fun setHookAndThrow() {
     val hook = { throwable: Throwable ->

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

@@ -2,12 +2,13 @@
  * 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, ExperimentalStdlibApi::class)
+@file:OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class, kotlin.native.runtime.NativeRuntimeApi::class)
 
 import kotlin.test.*
 
 import kotlin.native.concurrent.*
 import kotlin.native.internal.*
+import kotlin.native.runtime.Debugging
 
 fun mainLegacyMM() {
     val wrong = "wrong"

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

@@ -7,13 +7,14 @@ package kotlin.native.internal
 /*
  * Internal utilities for debugging K/N compiler and runtime.
  */
-public object Debugging {
-    public var forceCheckedShutdown: Boolean
-        get() = Debugging_getForceCheckedShutdown()
-        set(value) = Debugging_setForceCheckedShutdown(value)
 
-    public val isThreadStateRunnable: Boolean
-        get() = Debugging_isThreadStateRunnable()
+@OptIn(kotlin.native.runtime.NativeRuntimeApi::class)
+@Deprecated("Use kotlin.native.runtime.Debugging instead.", ReplaceWith("Debugging", "kotlin.native.runtime.Debugging"))
+@DeprecatedSinceKotlin(warningSince = "1.9")
+public object Debugging {
+    public var forceCheckedShutdown: Boolean by kotlin.native.runtime.Debugging::forceCheckedShutdown
+
+    public val isThreadStateRunnable: Boolean by kotlin.native.runtime.Debugging::isThreadStateRunnable
 }
 
 @GCUnsafeCall("Kotlin_Debugging_isPermanent")
@@ -23,12 +24,3 @@ public external fun Any.isPermanent() : Boolean
 @GCUnsafeCall("Kotlin_Debugging_isLocal")
 @InternalForKotlinNative
 public external fun Any.isLocal() : Boolean
-
-@GCUnsafeCall("Kotlin_Debugging_getForceCheckedShutdown")
-private external fun Debugging_getForceCheckedShutdown(): Boolean
-
-@GCUnsafeCall("Kotlin_Debugging_setForceCheckedShutdown")
-private external fun Debugging_setForceCheckedShutdown(value: Boolean): Unit
-
-@GCUnsafeCall("Kotlin_Debugging_isThreadStateRunnable")
-private external fun Debugging_isThreadStateRunnable(): Boolean

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

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2010-2023 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.native.runtime
+
+import kotlin.native.internal.GCUnsafeCall
+import kotlin.native.internal.InternalForKotlinNative
+
+/**
+ * __Note__: this API is unstable and may change in any release.
+ *
+ * A set of utilities for debugging Kotlin/Native runtime.
+ */
+@NativeRuntimeApi
+@SinceKotlin("1.9")
+public object Debugging {
+    /**    
+     * Run full checked deinitialization on shutdown.
+     *
+     * Make sure that after exiting `main()` only a single thread with Kotlin runtime remains.
+     * Run GC collecting everything including globals.
+     *
+     * When enabled together with [Platform.isCleanersLeakCheckerActive] additionally checks that no cleaners get executed after `main()`
+     */
+    public var forceCheckedShutdown: Boolean
+        get() = Debugging_getForceCheckedShutdown()
+        set(value) = Debugging_setForceCheckedShutdown(value)
+
+    /**
+     * Whether the current thread's state allows running Kotlin code.
+     *
+     * Used by Kotlin/Native internal tests.
+     * If it returns `false`, it's a bug.
+     */
+    @InternalForKotlinNative
+    public val isThreadStateRunnable: Boolean
+        get() = Debugging_isThreadStateRunnable()
+}
+
+
+@GCUnsafeCall("Kotlin_Debugging_getForceCheckedShutdown")
+private external fun Debugging_getForceCheckedShutdown(): Boolean
+
+@GCUnsafeCall("Kotlin_Debugging_setForceCheckedShutdown")
+private external fun Debugging_setForceCheckedShutdown(value: Boolean): Unit
+
+@GCUnsafeCall("Kotlin_Debugging_isThreadStateRunnable")
+private external fun Debugging_isThreadStateRunnable(): Boolean