TEST: throw keyword support.

backend.native/tests/build.gradle

@@ -380,9 +380,14 @@ task intrinsic(type: UnitKonanTest) {
 task link(type: LinkKonanTest) {
     source = "link/src/bar.kt"
     lib = "link/lib"
-} 
+}
 
 task for0(type: RunKonanTest) {
     goldValue = "2\n3\n4\n"
     source = "runtime/basic/for0.kt"
-}
+}
+
+task throw0(type: RunKonanTest) {
+    goldValue = "Done\n"
+    source = "runtime/basic/throw0.kt"
+}

backend.native/tests/runtime/basic/throw0.kt

@@ -0,0 +1,8 @@
+fun main(args : Array<String>) {
+    val cond = 1
+    if (cond == 2) throw RuntimeException()
+    if (cond == 3) throw NoSuchElementException("no such element")
+    if (cond == 4) throw Error("error happens")
+
+    println("Done")
+}

runtime/src/main/cpp/Exceptions.cpp

@@ -4,6 +4,7 @@
 
 #include "Assert.h"
 #include "Exceptions.h"
+#include "Types.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -35,6 +36,12 @@ void ThrowClassCastException() {
   RuntimeAssert(false, "Throwing is unsupported");
 }
 
+void ThrowException(KRef exception) {
+  RuntimeAssert(exception != nullptr && IsInstance(exception, theThrowableTypeInfo),
+                "Throwing something non-throwable");
+  RuntimeAssert(false, "Throwing is unsupported");
+}
+
 
 #ifdef __cplusplus
 } // extern "C"

runtime/src/main/cpp/Exceptions.h

@@ -13,6 +13,8 @@ void ThrowNullPointerException();
 void ThrowArrayIndexOutOfBoundsException();
 // Throws class cast exception.
 void ThrowClassCastException();
+// Throws arbitrary exception.
+void ThrowException(KRef exception);
 
 #ifdef __cplusplus
 } // extern "C"

runtime/src/main/cpp/Types.h

@@ -33,6 +33,7 @@ extern const TypeInfo* theFloatArrayTypeInfo;
 extern const TypeInfo* theDoubleArrayTypeInfo;
 extern const TypeInfo* theBooleanArrayTypeInfo;
 extern const TypeInfo* theStringTypeInfo;
+extern const TypeInfo* theThrowableTypeInfo;
 
 KBoolean IsInstance(const ObjHeader* obj, const TypeInfo* type_info);
 void CheckCast(const ObjHeader* obj, const TypeInfo* type_info);

runtime/src/main/kotlin/kotlin/Throwable.kt

@@ -6,6 +6,7 @@ package kotlin
  * @param message the detail message string.
  * @param cause the cause of this throwable.
  */
+@ExportTypeInfo("theThrowableTypeInfo")
 public open class Throwable(open val message: String?, open val cause: Throwable?) {
     constructor(message: String?) : this(message, null)