1 // Copyright 2014 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Flags: --expose-debug-as debug --harmony-generators 6 7 var Debug = debug.Debug; 8 9 function assertIteratorResult(value, done, result) { 10 assertEquals({value: value, done: done}, result); 11 } 12 13 function RunTest(formals_and_body, args, value1, value2) { 14 // A null listener. It isn't important what the listener does. 15 function listener(event, exec_state, event_data, data) { 16 } 17 18 // Create the generator function outside a debugging context. It will probably 19 // be lazily compiled. 20 var gen = (function*(){}).constructor.apply(null, formals_and_body); 21 22 // Instantiate the generator object. 23 var obj = gen.apply(null, args); 24 25 // Advance to the first yield. 26 assertIteratorResult(value1, false, obj.next()); 27 28 // Add a breakpoint on line 3 (the second yield). 29 var bp = Debug.setBreakPoint(gen, 3); 30 31 // Enable the debugger, which should force recompilation of the generator 32 // function and relocation of the suspended generator activation. 33 Debug.setListener(listener); 34 35 // Check that the generator resumes and suspends properly. 36 assertIteratorResult(value2, false, obj.next()); 37 38 // Disable debugger -- should not force recompilation. 39 Debug.clearBreakPoint(bp); 40 Debug.setListener(null); 41 42 // Run to completion. 43 assertIteratorResult(undefined, true, obj.next()); 44 } 45 46 function prog(a, b, c) { 47 return a + ';\n' + 'yield ' + b + ';\n' + 'yield ' + c; 48 } 49 50 // Simple empty local scope. 51 RunTest([prog('', '1', '2')], [], 1, 2); 52 53 RunTest([prog('for (;;) break', '1', '2')], [], 1, 2); 54 55 RunTest([prog('while (0) foo()', '1', '2')], [], 1, 2); 56 57 RunTest(['a', prog('var x = 3', 'a', 'x')], [1], 1, 3); 58 59 RunTest(['a', prog('', '1', '2')], [42], 1, 2); 60 61 RunTest(['a', prog('for (;;) break', '1', '2')], [42], 1, 2); 62
