[Interop][Test] Add tests for pointers and arrays

backend.native/tests/build.gradle

@@ -3473,6 +3473,10 @@ createInterop("cunion") {
     it.defFile 'interop/basics/cunion.def'
 }
 
+createInterop("carrayPointers") {
+    it.defFile 'interop/basics/carrayPointers.def'
+}
+
 createInterop("auxiliaryCppSources") {
     // We need to provide empty def file to create correct `KonanInteropTask`.
     it.defFile 'interop/auxiliary_sources/auxiliaryCppSources.def'
@@ -3728,6 +3732,12 @@ interopTest("interop_union") {
     source = "interop/basics/union.kt"
 }
 
+interopTest("interop_array_pointers") {
+    disabled = (project.testTarget == 'wasm32') // No interop for wasm yet.
+    interop = 'carrayPointers'
+    source = "interop/basics/arrayPointers.kt"
+}
+
 task interop_convert(type: KonanLocalTest) {
     source = "codegen/intrinsics/interop_convert.kt"
 }

backend.native/tests/interop/basics/arrayPointers.kt

@@ -0,0 +1,16 @@
+import carrayPointers.*
+import kotlin.test.*
+import kotlinx.cinterop.*
+
+fun main() {
+    arrayPointer = globalArray
+    assertEquals(globalArray[0], arrayPointer!![0])
+    arrayPointer!![0] = 15
+    assertEquals(15, globalArray[0])
+
+    memScoped {
+        val struct = alloc<StructWithArrayPtr>()
+        struct.arrayPointer = globalArray
+        assertEquals(globalArray[0], struct.arrayPointer!![0])
+    }
+}

backend.native/tests/interop/basics/carrayPointers.def

@@ -0,0 +1,8 @@
+---
+int (*arrayPointer)[1];
+
+int globalArray[3] = {1, 2, 3};
+
+struct StructWithArrayPtr {
+    int (*arrayPointer)[1];
+};