michael@0: // frame.arguments is "live" (it reflects assignments to arguments).
michael@0: 
michael@0: var g = newGlobal();
michael@0: var dbg = new Debugger(g);
michael@0: var log = '';
michael@0: var args;
michael@0: dbg.onDebuggerStatement = function (frame) {
michael@0:     if (args === undefined)
michael@0:         args = frame.arguments;
michael@0:     else
michael@0:         assertEq(frame.arguments, args);
michael@0:     log += args[0];
michael@0:     assertEq(frame.eval("x = '0';").return, '0');
michael@0:     log += args[0];
michael@0: };
michael@0: 
michael@0: g.eval("function f(x) { x = '2'; debugger; x = '3'; debugger; }");
michael@0: g.f("1");
michael@0: assertEq(log, "2030");