KJS: implement Throwable in Kotlin instead of use it as alias of JS Error

* Make it an inheritor of JS Error. Otherwise, Chakra engine doesn't fill stack trace of exception; In other engines inheritance has some good effects too.
* Copy all properties from internally created instance of JS Error

 #KT-6985 Fixed
 #KT-2328 Fixed
 #KT-8019 Fixed
 #KT-10911 Fixed

compiler/testData/codegen/box/specialBuiltins/throwableImpl.kt

@@ -1,6 +1,3 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
 class MyThrowable(message: String? = null, cause: Throwable? = null) : Throwable(message, cause) {
 
     override val message: String?

js/js.libraries/src/builtins/Throwable.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package kotlin
+
+import kotlin.js.internal.JsError
+
+/**
+ * The base class for all errors and exceptions. Only instances of this class can be thrown or caught.
+ *
+ * @param message the detail message string.
+ * @param cause the cause of this throwable.
+ */
+public open class Throwable(open val message: String?, open val cause: Throwable?) : JsError(message) {
+    constructor(message: String?) : this(message, null)
+
+    constructor(cause: Throwable?) : this(cause?.toString(), cause)
+
+    constructor() : this(null, null)
+
+    init {
+        var e = JsError(message)
+        copyOwnProperties(e, this)
+        val t: dynamic = this
+        t.name = t.constructor.name
+    }
+}
+
+private fun copyOwnProperties(from: dynamic, to: dynamic) {
+    val names: Array<String> = js("Object").getOwnPropertyNames(from);
+    for (name in names) {
+        to[name] = from[name];
+    }
+}

js/js.libraries/src/builtins/declarations.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package kotlin.js.internal
+
+@native
+@JsName("Error")
+public open class JsError(message: String?)

js/js.libraries/src/core/exceptions.kt

@@ -16,38 +16,28 @@
 
 package kotlin
 
-open class Error(message: String? = null) : Throwable(message, null) {
+open class Error(message: String? = null) : Throwable(message, null)
-    init {
-        val self: dynamic = this
-        self.message = message
-    }
-}
 
-open class Exception(message: String? = null) : Throwable(message, null) {
+open class Exception(message: String? = null) : Throwable(message, null)
-    init {
-        val self: dynamic = this
-        self.message = message
-    }
-}
 
-open class RuntimeException(message: String? = null) : Exception(message) {}
+open class RuntimeException(message: String? = null) : Exception(message)
 
-open class IllegalArgumentException(message: String? = null) : RuntimeException(message) {}
+open class IllegalArgumentException(message: String? = null) : RuntimeException(message)
 
-open class IllegalStateException(message: String? = null) : RuntimeException(message) {}
+open class IllegalStateException(message: String? = null) : RuntimeException(message)
 
-open class IndexOutOfBoundsException(message: String? = null) : RuntimeException(message) {}
+open class IndexOutOfBoundsException(message: String? = null) : RuntimeException(message)
 
-open class ConcurrentModificationException(message: String? = null) : RuntimeException(message) {}
+open class ConcurrentModificationException(message: String? = null) : RuntimeException(message)
 
-open class UnsupportedOperationException(message: String? = null) : RuntimeException(message) {}
+open class UnsupportedOperationException(message: String? = null) : RuntimeException(message)
 
-open class NumberFormatException(message: String? = null) : RuntimeException(message) {}
+open class NumberFormatException(message: String? = null) : RuntimeException(message)
 
-open class NullPointerException(message: String? = null) : RuntimeException(message) {}
+open class NullPointerException(message: String? = null) : RuntimeException(message)
 
-open class ClassCastException(message: String? = null) : RuntimeException(message) {}
+open class ClassCastException(message: String? = null) : RuntimeException(message)
 
-open class AssertionError(message: String? = null) : Error(message) {}
+open class AssertionError(message: String? = null) : Error(message)
 
-open class NoSuchElementException(message: String? = null) : Exception() {}
+open class NoSuchElementException(message: String? = null) : Exception()

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java

@@ -2953,6 +2953,12 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
                 KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("js/js.translator/testData/box/expression/try"), Pattern.compile("^([^_](.+))\\.kt$"), TargetBackend.ANY, true);
             }
 
+            @TestMetadata("exceptionToString.kt")
+            public void testExceptionToString() throws Exception {
+                String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/expression/try/exceptionToString.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("multipleCatchBlocks.kt")
             public void testMultipleCatchBlocks() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/expression/try/multipleCatchBlocks.kt");

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java

@@ -19805,13 +19805,7 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
         @TestMetadata("throwableImpl.kt")
         public void testThrowableImpl() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/specialBuiltins/throwableImpl.kt");
-            try {
+            doTest(fileName);
-                doTest(fileName);
-            }
-            catch (Throwable ignore) {
-                return;
-            }
-            throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
         }
 
         @TestMetadata("valuesInsideEnum.kt")

js/js.translator/src/org/jetbrains/kotlin/js/translate/context/StaticContext.java

@@ -240,9 +240,6 @@ public final class StaticContext {
             if (KotlinBuiltIns.isAny(classDescriptor)) {
                 return pureFqn("Object", null);
             }
-            if (DescriptorUtils.getFqName(classDescriptor).asString().equals("kotlin.Throwable")) {
-                return pureFqn("Error", null);
-            }
         }
 
         SuggestedName suggested = nameSuggestion.suggest(descriptor);

js/js.translator/src/org/jetbrains/kotlin/js/translate/intrinsic/functions/factories/TopLevelFIF.java

@@ -186,8 +186,6 @@ public final class TopLevelFIF extends CompositeFIF {
         add(pattern("kotlin.js", "Json", "get"), ArrayFIF.GET_INTRINSIC);
         add(pattern("kotlin.js", "Json", "set"), ArrayFIF.SET_INTRINSIC);
 
-        add(pattern("kotlin", "Throwable", "getMessage"), MESSAGE_PROPERTY_INTRINSIC);
-
         add(pattern("kotlin.js", "jsClass"), JS_CLASS_FUN_INTRINSIC);
     }
 

js/js.translator/testData/box/expression/try/exceptionToString.kt

@@ -0,0 +1,26 @@
+package foo
+
+class MyException(m: String? = null): Exception(m)
+class MyException2(m: String? = null): Throwable(m)
+
+fun check(e: Throwable, expectedString: String) {
+    try {
+        throw e
+    }
+    catch (e: Throwable) {
+        assertEquals(expectedString, e.toString())
+    }
+}
+
+fun box(): String {
+    check(Throwable(), "Throwable: null")
+    check(Throwable("ccc"), "Throwable: ccc")
+    check(Exception(), "Exception: null")
+    check(Exception("bbb"), "Exception: bbb")
+    check(MyException(), "MyException: null")
+    check(MyException("aaa"), "MyException: aaa")
+    check(MyException2(), "MyException2: null")
+    check(MyException2("aaa"), "MyException2: aaa")
+
+    return "OK"
+}

js/js.translator/testData/kotlin_lib.js

@@ -199,8 +199,6 @@ Kotlin.intDownto = function (from, to) {
     return new Kotlin.kotlin.ranges.IntProgression(from, to, -1);
 };
 
-Kotlin.Throwable = Error;
-
 Kotlin.throwNPE = function (message) {
     throw new Kotlin.kotlin.NullPointerException(message);
 };