1// Copyright 2008 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28// Flags: --expose-debug-as debug 29// Get the Debug object exposed from the debug context global object. 30Debug = debug.Debug 31 32// Simple debug event handler which first time hit will perform 1000 steps and 33// second time hit will evaluate and store the value of "i". If requires that 34// the global property "state" is initially zero. 35 36var bp1, bp2; 37 38function listener(event, exec_state, event_data, data) { 39 if (event == Debug.DebugEvent.Break) { 40 if (step_count > 0) { 41 exec_state.prepareStep(Debug.StepAction.StepIn); 42 step_count--; 43 } else { 44 result = exec_state.frame().evaluate("i").value(); 45 // Clear the break point on line 2 if set. 46 if (bp2) { 47 Debug.clearBreakPoint(bp2); 48 } 49 } 50 } 51}; 52 53// Add the debug event listener. 54Debug.setListener(listener); 55 56// Test debug event for break point. 57function f() { 58 var i; // Line 1. 59 for (i = 0; i < 1000; i++) { // Line 2. 60 x = 1; // Line 3. 61 } 62}; 63 64// Set a breakpoint on the for statement (line 1). 65bp1 = Debug.setBreakPoint(f, 1); 66 67// Check that performing 1000 steps will make i 499. 68var step_count = 1000; 69result = -1; 70f(); 71assertEquals(332, result); 72Debug.setListener(null); 73