| <!DOCTYPE html> |
| <!-- |
| Copyright 2018 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="/tracing/base/unit.html"> |
| <link rel="import" href="/tracing/metrics/metric_registry.html"> |
| <link rel="import" href="/tracing/value/diagnostics/generic_set.html"> |
| <link rel="import" href="/tracing/value/histogram.html"> |
| |
| <script> |
| 'use strict'; |
| |
| tr.exportTo('tr.metrics.console', function() { |
| const COUNT_BOUNDARIES = tr.v.HistogramBinBoundaries.createExponential( |
| 1, 1e4, 30); |
| // We store a single value, so we only need one of the statistics to keep |
| // track. We choose the average for that. |
| const SUMMARY_OPTIONS = tr.v.Histogram.AVERAGE_ONLY_SUMMARY_OPTIONS; |
| |
| // Sources of console error message that we are interested in. |
| const SOURCES = ['all', 'js', 'network']; |
| |
| /** |
| * This metric counts slices named 'ConsoleErrorMessage' and adds: |
| * - console:error:all - all console error messages. |
| * - console:error:js - console error messages coming from JS. |
| * - console:error:network - console error messages coming from network. |
| * If a console error message does not come from JS or network, it is still |
| * accounted in the console_error_all. |
| */ |
| function consoleErrorMetric(histograms, model) { |
| const counts = {}; |
| for (const source of SOURCES) { |
| counts[source] = {count: 0, details: []}; |
| } |
| for (const slice of model.getDescendantEvents()) { |
| if (slice.category === 'blink.console' && |
| slice.title === 'ConsoleMessage::Error') { |
| const source = slice.args.source.toLowerCase(); |
| counts.all.count++; |
| if (slice.args.message) { |
| counts.all.details.push( |
| {pid: slice.getProcess().pid, ...slice.args.message}); |
| } |
| if (source in counts) { |
| counts[source].count++; |
| if (slice.args.message) { |
| counts[source].details.push( |
| {pid: slice.getProcess().pid, ...slice.args.message}); |
| } |
| } |
| } |
| if (slice.category === 'v8.console' && ( |
| slice.title === 'V8ConsoleMessage::Exception' || |
| slice.title === 'V8ConsoleMessage::Error' || |
| slice.title === 'V8ConsoleMessage::Assert')) { |
| counts.all.count++; |
| counts.js.count++; |
| } |
| } |
| for (const source of SOURCES) { |
| const hist = histograms.createHistogram( |
| `console:error:${source}`, |
| tr.b.Unit.byName.count_smallerIsBetter, { |
| value: counts[source].count, diagnostics: { |
| details: new tr.v.d.GenericSet(counts[source].details) |
| } |
| }, { |
| description: `Number of ${source} console error messages`, |
| summaryOptions: SUMMARY_OPTIONS, |
| }); |
| } |
| } |
| |
| tr.metrics.MetricRegistry.register(consoleErrorMetric); |
| |
| return { |
| consoleErrorMetric, |
| }; |
| }); |
| </script> |
