1 // Copyright 2016 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 --allow-natives-syntax 6 7 Debug = debug.Debug 8 9 var exception = null; 10 11 function f() { 12 let a = 0; 13 function g() { 14 let a = 1; 15 { 16 let a = 2; 17 debugger; // Breakpoint. 18 if (a !== 3) { 19 // We cannot change stack locals in optimized frames. 20 assertEquals(2, a); 21 assertOptimized(g); 22 } 23 } 24 assertEquals(1, a); 25 } 26 g.call(1); 27 if (a !== 4) { 28 // We cannot change stack locals in optimized frames. 29 assertEquals(0, a); 30 assertOptimized(f); 31 } 32 } 33 34 35 function listener(event, exec_state, event_data, data) { 36 if (event != Debug.DebugEvent.Break) return; 37 try { 38 exec_state.frame(0).evaluate("a = 3"); 39 exec_state.frame(1).evaluate("a = 4"); 40 assertThrows(() => exec_state.frame(0).evaluate("this = 2")); 41 } catch (e) { 42 exception = e; 43 print("Caught something. " + e + " " + e.stack); 44 }; 45 }; 46 47 Debug.setListener(listener); 48 49 f(); 50 51 Debug.setListener(null); 52 assertNull(exception); 53
