Tests on migrating main thread and memory leaks with interop (#4494)

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

@@ -4343,6 +4343,25 @@ dynamicTest("interop_cleaners_leak") {
     flags = ['-Xopt-in=kotlin.native.internal.InternalForKotlinNative']
 }
 
+dynamicTest("interop_migrating_main_thread") {
+    // TODO: Fix it.
+    disabled = (project.testTarget != null && project.testTarget != project.hostName)
+    source = "interop/migrating_main_thread/lib.kt"
+    cSource = "$projectDir/interop/migrating_main_thread/main.cpp"
+    clangTool = "clang++"
+}
+
+dynamicTest("interop_memory_leaks") {
+    // TODO: Fix it.
+    disabled = (project.testTarget != null && project.testTarget != project.hostName) || project.globalTestArgs.contains('-opt') || (project.testTarget == 'wasm32') // Needs debug build.
+    source = "interop/memory_leaks/lib.kt"
+    cSource = "$projectDir/interop/memory_leaks/main.cpp"
+    clangTool = "clang++"
+    flags = ['-g']
+    expectedExitStatusChecker = { it != 0 }
+    outputChecker = { s -> s.contains("Memory leaks detected, 1 objects leaked!") }
+}
+
 task library_mismatch(type: KonanDriverTest) {
     // Does not work for cross targets yet.
     enabled = !(project.testTarget != null && project.target.name != project.hostName)

kotlin-native/backend.native/tests/interop/memory_leaks/lib.kt

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2010-2020 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.
+ */
+
+import kotlinx.cinterop.*
+
+fun leakMemory() {
+    StableRef.create(Any())
+}

kotlin-native/backend.native/tests/interop/memory_leaks/main.cpp

@@ -0,0 +1,16 @@
+/*
+ * Copyright 2010-2020 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.
+ */
+
+#include "testlib_api.h"
+
+#include <thread>
+
+int main() {
+    std::thread t([]() {
+        testlib_symbols()->kotlin.root.leakMemory();
+    });
+    t.join();
+    return 0;
+}

kotlin-native/backend.native/tests/interop/migrating_main_thread/lib.kt

@@ -0,0 +1,16 @@
+/*
+ * Copyright 2010-2020 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.
+ */
+
+class A {
+    var i = 0
+}
+
+private var globalA = A()
+
+fun writeToA(i: Int) {
+    globalA.i = i
+}
+
+fun readFromA() = globalA.i

kotlin-native/backend.native/tests/interop/migrating_main_thread/main.cpp

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2010-2020 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.
+ */
+
+#include "testlib_api.h"
+
+#include <cassert>
+#include <thread>
+
+int main() {
+    std::thread main1([]() {
+        assert(testlib_symbols()->kotlin.root.readFromA() == 0);
+        testlib_symbols()->kotlin.root.writeToA(1);
+        assert(testlib_symbols()->kotlin.root.readFromA() == 1);
+    });
+    main1.join();
+
+    std::thread main2([]() {
+        // Globals were reinitialized.
+        assert(testlib_symbols()->kotlin.root.readFromA() == 0);
+    });
+    main2.join();
+
+    return 0;
+}