| <!DOCTYPE html> |
| <!-- |
| Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| Use of this source code is governed by a BSD-style license that can be |
| found in the LICENSE file. |
| --> |
| <link rel="import" href="/base/base.html"> |
| <link rel="import" href="/base/extension_registry.html"> |
| <script> |
| 'use strict'; |
| |
| /** |
| * @fileoverview Base class for linux perf event parsers. |
| * |
| * The linux perf trace event importer depends on subclasses of |
| * Parser to parse event data. Each subclass corresponds |
| * to a group of trace events; e.g. SchedParser implements |
| * parsing of sched:* kernel trace events. Parser subclasses must |
| * call Parser.register to arrange to be instantiated |
| * and their constructor must register their event handlers with the |
| * importer. For example, |
| * |
| * var Parser = tr.e.importer.linux_perf.Parser; |
| * |
| * function WorkqueueParser(importer) { |
| * Parser.call(this, importer); |
| * |
| * importer.registerEventHandler('workqueue_execute_start', |
| * WorkqueueParser.prototype.executeStartEvent.bind(this)); |
| * importer.registerEventHandler('workqueue_execute_end', |
| * WorkqueueParser.prototype.executeEndEvent.bind(this)); |
| * } |
| * |
| * Parser.register(WorkqueueParser); |
| * |
| * When a registered event name is found in the data stream the associated |
| * event handler is invoked: |
| * |
| * executeStartEvent: function(eventName, cpuNumber, ts, eventBase) |
| * |
| * If the routine returns false the caller will generate an import error |
| * saying there was a problem parsing it. Handlers can also emit import |
| * messages using this.importer.model.importWarning. If this is done in lieu of |
| * the generic import error it may be desirable for the handler to return |
| * true. |
| * |
| * Trace events generated by writing to the trace_marker file are expected |
| * to have a leading text marker followed by a ':'; e.g. the trace clock |
| * synchronization event is: |
| * |
| * tracing_mark_write: trace_event_clock_sync: parent_ts=0 |
| * |
| * To register an event handler for these events, prepend the marker with |
| * 'tracing_mark_write:'; e.g. |
| * |
| * this.registerEventHandler('tracing_mark_write:trace_event_clock_sync', |
| * |
| * All subclasses should depend on importer.linux_perf.parser, e.g. |
| * |
| * tr.defineModule('importer.linux_perf.workqueue_parser') |
| * .dependsOn('importer.linux_perf.parser') |
| * .exportsTo('tracing', function() |
| * |
| * and be listed in the dependsOn of LinuxPerfImporter. Beware that after |
| * adding a new subclass you must run build/generate_about_tracing_contents.py |
| * to regenerate tr.ui.e.about_tracing.*. |
| */ |
| tr.exportTo('tr.e.importer.linux_perf', function() { |
| /** |
| * Parses linux perf events. |
| * @constructor |
| */ |
| function Parser(importer) { |
| this.importer = importer; |
| this.model = importer.model; |
| } |
| |
| Parser.prototype = { |
| __proto__: Object.prototype |
| }; |
| |
| var options = new tr.b.ExtensionRegistryOptions(tr.b.BASIC_REGISTRY_MODE); |
| options.mandatoryBaseClass = Parser; |
| tr.b.decorateExtensionRegistry(Parser, options); |
| |
| return { |
| Parser: Parser |
| }; |
| }); |
| </script> |
