JezK
Edit File: debug-backtrace.js
// Copyright 2008 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // Flags: --expose-debug-as debug // The functions used for testing backtraces. They are at the top to make the // testing of source line/column easier. function f(x, y) { a=1; }; var m = function() { new f(1); }; function g() { m(); }; // Get the Debug object exposed from the debug context global object. Debug = debug.Debug listenerCalled = false; exception = false; function ParsedResponse(json) { this.response_ = eval('(' + json + ')'); this.refs_ = []; if (this.response_.refs) { for (var i = 0; i < this.response_.refs.length; i++) { this.refs_[this.response_.refs[i].handle] = this.response_.refs[i]; } } } ParsedResponse.prototype.response = function() { return this.response_; } ParsedResponse.prototype.body = function() { return this.response_.body; } ParsedResponse.prototype.running = function() { return this.response_.running; } ParsedResponse.prototype.lookup = function(handle) { return this.refs_[handle]; } function listener(event, exec_state, event_data, data) { try { if (event == Debug.DebugEvent.Break) { // The expected backtrace is // 0: f // 1: m // 2: g // 3: [anonymous] var response; var backtrace; var frame; var source; var dcp; // New copy of debug command processor paused state. dcp = exec_state.debugCommandProcessor(false); // Get the backtrace. var json; json = '{"seq":0,"type":"request","command":"backtrace"}' var resp = dcp.processDebugJSONRequest(json); response = new ParsedResponse(resp); backtrace = response.body(); assertEquals(0, backtrace.fromFrame); assertEquals(4, backtrace.toFrame); assertEquals(4, backtrace.totalFrames); var frames = backtrace.frames; assertEquals(4, frames.length); for (var i = 0; i < frames.length; i++) { assertEquals('frame', frames[i].type); } assertEquals(0, frames[0].index); assertEquals("f", response.lookup(frames[0].func.ref).name); assertEquals(1, frames[1].index); assertEquals("", response.lookup(frames[1].func.ref).name); assertEquals("m", response.lookup(frames[1].func.ref).inferredName); assertEquals(2, frames[2].index); assertEquals("g", response.lookup(frames[2].func.ref).name); assertEquals(3, frames[3].index); assertEquals("", response.lookup(frames[3].func.ref).name); assertFalse(response.running(), "expected not running"); // Get backtrace with two frames. json = '{"seq":0,"type":"request","command":"backtrace","arguments":{"fromFrame":1,"toFrame":3}}' response = new ParsedResponse(dcp.processDebugJSONRequest(json)); backtrace = response.body(); assertEquals(1, backtrace.fromFrame); assertEquals(3, backtrace.toFrame); assertEquals(4, backtrace.totalFrames); var frames = backtrace.frames; assertEquals(2, frames.length); for (var i = 0; i < frames.length; i++) { assertEquals('frame', frames[i].type); } assertEquals(1, frames[0].index); assertEquals("", response.lookup(frames[0].func.ref).name); assertEquals("m", response.lookup(frames[0].func.ref).inferredName); assertEquals(2, frames[1].index); assertEquals("g", response.lookup(frames[1].func.ref).name); // Get backtrace with bottom two frames. json = '{"seq":0,"type":"request","command":"backtrace","arguments":{"fromFrame":0,"toFrame":2, "bottom":true}}' response = new ParsedResponse(dcp.processDebugJSONRequest(json)); backtrace = response.body(); assertEquals(2, backtrace.fromFrame); assertEquals(4, backtrace.toFrame); assertEquals(4, backtrace.totalFrames); var frames = backtrace.frames; assertEquals(2, frames.length); for (var i = 0; i < frames.length; i++) { assertEquals('frame', frames[i].type); } assertEquals(2, frames[0].index); assertEquals("g", response.lookup(frames[0].func.ref).name); assertEquals(3, frames[1].index); assertEquals("", response.lookup(frames[1].func.ref).name); // Get the individual frames. json = '{"seq":0,"type":"request","command":"frame"}' response = new ParsedResponse(dcp.processDebugJSONRequest(json)); frame = response.body(); assertEquals(0, frame.index); assertEquals("f", response.lookup(frame.func.ref).name); assertTrue(frame.constructCall); assertEquals(31, frame.line); assertEquals(3, frame.column); assertEquals(2, frame.arguments.length); assertEquals('x', frame.arguments[0].name); assertEquals('number', response.lookup(frame.arguments[0].value.ref).type); assertEquals(1, response.lookup(frame.arguments[0].value.ref).value); assertEquals('y', frame.arguments[1].name); assertEquals('undefined', response.lookup(frame.arguments[1].value.ref).type); json = '{"seq":0,"type":"request","command":"frame","arguments":{"number":0}}' response = new ParsedResponse(dcp.processDebugJSONRequest(json)); frame = response.body(); assertEquals(0, frame.index); assertEquals("f", response.lookup(frame.func.ref).name); assertEquals(31, frame.line); assertEquals(3, frame.column); assertEquals(2, frame.arguments.length); assertEquals('x', frame.arguments[0].name); assertEquals('number', response.lookup(frame.arguments[0].value.ref).type); assertEquals(1, response.lookup(frame.arguments[0].value.ref).value); assertEquals('y', frame.arguments[1].name); assertEquals('undefined', response.lookup(frame.arguments[1].value.ref).type); json = '{"seq":0,"type":"request","command":"frame","arguments":{"number":1}}' response = new ParsedResponse(dcp.processDebugJSONRequest(json)); frame = response.body(); assertEquals(1, frame.index); assertEquals("", response.lookup(frame.func.ref).name); assertEquals("m", response.lookup(frame.func.ref).inferredName); assertFalse(frame.constructCall); assertEquals(35, frame.line); assertEquals(6, frame.column); assertEquals(0, frame.arguments.length); json = '{"seq":0,"type":"request","command":"frame","arguments":{"number":3}}' response = new ParsedResponse(dcp.processDebugJSONRequest(json)); frame = response.body(); assertEquals(3, frame.index); assertEquals("", response.lookup(frame.func.ref).name); // Source slices for the individual frames (they all refer to this script). json = '{"seq":0,"type":"request","command":"source",' + '"arguments":{"frame":0,"fromLine":30,"toLine":32}}' response = new ParsedResponse(dcp.processDebugJSONRequest(json)); source = response.body(); assertEquals("function f(x, y) {", source.source.substring(0, 18)); assertEquals(30, source.fromLine); assertEquals(32, source.toLine); json = '{"seq":0,"type":"request","command":"source",' + '"arguments":{"frame":1,"fromLine":31,"toLine":32}}' response = new ParsedResponse(dcp.processDebugJSONRequest(json)); source = response.body(); assertEquals(" a=1;", source.source.substring(0, 6)); assertEquals(31, source.fromLine); assertEquals(32, source.toLine); json = '{"seq":0,"type":"request","command":"source",' + '"arguments":{"frame":2,"fromLine":35,"toLine":36}}' response = new ParsedResponse(dcp.processDebugJSONRequest(json)); source = response.body(); assertEquals(" new f(1);", source.source.substring(0, 11)); assertEquals(35, source.fromLine); assertEquals(36, source.toLine); // Test line interval way beyond this script will result in an error. json = '{"seq":0,"type":"request","command":"source",' + '"arguments":{"frame":0,"fromLine":10000,"toLine":20000}}' response = new ParsedResponse(dcp.processDebugJSONRequest(json)); assertFalse(response.response().success); // Test without arguments. json = '{"seq":0,"type":"request","command":"source"}' response = new ParsedResponse(dcp.processDebugJSONRequest(json)); source = response.body(); assertEquals(Debug.findScript(f).source, source.source); // New copy of debug command processor in running state. dcp = exec_state.debugCommandProcessor(true); // Get the backtrace. json = '{"seq":0,"type":"request","command":"backtrace"}' resp = dcp.processDebugJSONRequest(json); response = new ParsedResponse(resp); // It might be argueable, but we expect response to have body when // not suspended assertTrue(!!response.body(), "response should be null"); assertTrue(response.running(), "expected running"); listenerCalled = true; } } catch (e) { exception = e }; }; // Add the debug event listener. Debug.setListener(listener); // Set a break point and call to invoke the debug event listener. Debug.setBreakPoint(f, 0, 0); g(); // Make sure that the debug event listener vas invoked. assertFalse(exception, "exception in listener"); assertTrue(listenerCalled);