Relocate suspended generator activations when enabling debug mode

test/mjsunit/harmony/generators-relocation.js

Index: test/mjsunit/harmony/generators-relocation.js
diff --git a/test/mjsunit/harmony/generators-relocation.js b/test/mjsunit/harmony/generators-relocation.js
new file mode 100644
index 0000000000000000000000000000000000000000..4074235c82d7ea1ab3b58273dcc17e1a7b8d85d1
--- /dev/null
+++ b/test/mjsunit/harmony/generators-relocation.js
@@ -0,0 +1,61 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --expose-debug-as debug --harmony-generators
+
+var Debug = debug.Debug;
+
+function assertIteratorResult(value, done, result) {
+  assertEquals({value: value, done: done}, result);
+}
+
+function RunTest(formals_and_body, args, value1, value2) {
+  // A null listener. It isn't important what the listener does.
+  function listener(event, exec_state, event_data, data) {
+  }
+
+  // Create the generator function outside a debugging context. It will probably
+  // be lazily compiled.
+  var gen = (function*(){}).constructor.apply(null, formals_and_body);
+
+  // Instantiate the generator object.
+  var obj = gen.apply(null, args);
+
+  // Advance to the first yield.
+  assertIteratorResult(value1, false, obj.next());
+
+  // Add a breakpoint on line 3 (the second yield).
+  var bp = Debug.setBreakPoint(gen, 3);
+
+  // Enable the debugger, which should force recompilation of the generator
+  // function and relocation of the suspended generator activation.
+  Debug.setListener(listener);
+
+  // Check that the generator resumes and suspends properly.
+  assertIteratorResult(value2, false, obj.next());
+
+  // Disable debugger -- should not force recompilation.
+  Debug.clearBreakPoint(bp);
+  Debug.setListener(null);
+
+  // Run to completion.
+  assertIteratorResult(undefined, true, obj.next());
+}
+
+function prog(a, b, c) {
+  return a + ';\n' + 'yield ' + b + ';\n' + 'yield ' + c;
+}
+
+// Simple empty local scope.
+RunTest([prog('', '1', '2')], [], 1, 2);
+
+RunTest([prog('for (;;) break', '1', '2')], [], 1, 2);
+
+RunTest([prog('while (0) foo()', '1', '2')], [], 1, 2);
+
+RunTest(['a', prog('var x = 3', 'a', 'x')], [1], 1, 3);
+
+RunTest(['a', prog('', '1', '2')], [42], 1, 2);
+
+RunTest(['a', prog('for (;;) break', '1', '2')], [42], 1, 2);