The Tor Browser / file revision

 // Basic onExceptionUnwind hook test.

 load(libdir + "asserts.js");

 var g = newGlobal();

 var dbg = Debugger(g);

 var hit = false;

 dbg.onExceptionUnwind = function (frame, exc) {

     // onExceptionUnwind is called multiple times as the stack is unwound.

     // Only check the first hit.

     assertEq(arguments.length, 2);

     assertEq(frame instanceof Debugger.Frame, true);

     if (!hit) {

         assertEq(exc, 101);

         assertEq(frame.type, "call");

         assertEq(frame.callee.name, "f");

         assertEq(frame.older.type, "eval");

         hit = true;

     }

 };

 g.eval("function f() { throw 101; }");

 assertThrowsValue(function () { g.eval("f();"); }, 101);

 assertEq(hit, true);