Add d8 API for spawning function on a new thread.

test/mjsunit/d8-worker.js

Index: test/mjsunit/d8-worker.js
diff --git a/test/mjsunit/compiler/smi-stores-opt.js b/test/mjsunit/d8-worker.js
similarity index 73%
copy from test/mjsunit/compiler/smi-stores-opt.js
copy to test/mjsunit/d8-worker.js
index ca0923abc99501096d182bcdcd05f6f4020de9c9..055cbba26667d87ed7bce839a3d36a48b24675c8 100644
--- a/test/mjsunit/compiler/smi-stores-opt.js
+++ b/test/mjsunit/d8-worker.js
@@ -1,4 +1,4 @@
-// Copyright 2014 the V8 project authors. All rights reserved.
+// Copyright 2015 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -25,25 +25,22 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax
+// Test the Worker.new function of d8.  This test only makes sense with d8.
+// Worker.new spawns a new OS thread and isolate, and runs it concurrently with
+// the current running thread.
 
-var o = {a:1.5};
-o.a = 0;
-var a = o.a;
-
-function g() {
-  return 1;
+function f() {
+  // Set a global variable; should not be visible outside of the worker's
+  // context.
+  foo = 100;
+  return "OK";
 }
 
-var o2 = {a:{}};
+Worker.new(f);
 
-function f() {
-  var result = {a: a};
-  var literal = {x:g()};
-  return [result, literal];
-}
+// Currently can only create one worker at a time.
+assertThrows(function() { Worker.new(f); });
 
-f();
-f();
-%OptimizeFunctionOnNextCall(f);
-assertEquals(1, f()[1].x);
+var result = Worker.join();

[binji, 2015/06/15 19:11:48]

This API is a bit strange, but was the easiest to implement.

+assertEquals("undefined", typeof foo);
+assertEquals("OK", result);