Lazy stacktrace (#2036)

* stringify stacktrace lazily

* Introduce NativePtrArray

* Added Throwable::getStackTrace

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/descriptors/DescriptorUtils.kt

@@ -97,7 +97,8 @@ internal val arrayTypes = setOf(
         "kotlin.FloatArray",
         "kotlin.DoubleArray",
         "kotlin.BooleanArray",
-        "kotlin.native.ImmutableBlob"
+        "kotlin.native.ImmutableBlob",
+        "kotlin.native.internal.NativePtrArray"
 )
 
 

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/RTTIGenerator.kt

@@ -109,7 +109,8 @@ internal class RTTIGenerator(override val context: Context) : ContextUtils {
             "kotlin.DoubleArray"        to LLVMDoubleType()!!,
             "kotlin.BooleanArray"       to LLVMInt8Type()!!,
             "kotlin.String"             to LLVMInt16Type()!!,
-            "kotlin.native.ImmutableBlob" to LLVMInt8Type()!!
+            "kotlin.native.ImmutableBlob" to LLVMInt8Type()!!,
+            "kotlin.native.internal.NativePtrArray" to kInt8Ptr
     )
 
     // Keep in sync with Konan_RuntimeType.