diff options
Diffstat (limited to 'chromium/third_party/trace-viewer/src/tracing/importer/v8/log_reader.js')
-rw-r--r-- | chromium/third_party/trace-viewer/src/tracing/importer/v8/log_reader.js | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/chromium/third_party/trace-viewer/src/tracing/importer/v8/log_reader.js b/chromium/third_party/trace-viewer/src/tracing/importer/v8/log_reader.js deleted file mode 100644 index c2ffe173e97..00000000000 --- a/chromium/third_party/trace-viewer/src/tracing/importer/v8/log_reader.js +++ /dev/null @@ -1,219 +0,0 @@ -// 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. - -'use strict'; - -/** - * @fileoverview Log Reader is used to process log file produced by V8. - */ -base.exportTo('tracing.importer.v8', function() { - /** - * Creates a CSV lines parser. - */ - function CsvParser() { - }; - - - /** - * A regex for matching a CSV field. - * @private - */ - CsvParser.CSV_FIELD_RE_ = /^"((?:[^"]|"")*)"|([^,]*)/; - - - /** - * A regex for matching a double quote. - * @private - */ - CsvParser.DOUBLE_QUOTE_RE_ = /""/g; - - - /** - * Parses a line of CSV-encoded values. Returns an array of fields. - * - * @param {string} line Input line. - */ - CsvParser.prototype.parseLine = function(line) { - var fieldRe = CsvParser.CSV_FIELD_RE_; - var doubleQuoteRe = CsvParser.DOUBLE_QUOTE_RE_; - var pos = 0; - var endPos = line.length; - var fields = []; - if (endPos > 0) { - do { - var fieldMatch = fieldRe.exec(line.substr(pos)); - if (typeof fieldMatch[1] === 'string') { - var field = fieldMatch[1]; - pos += field.length + 3; // Skip comma and quotes. - fields.push(field.replace(doubleQuoteRe, '"')); - } else { - // The second field pattern will match anything, thus - // in the worst case the match will be an empty string. - var field = fieldMatch[2]; - pos += field.length + 1; // Skip comma. - fields.push(field); - } - } while (pos <= endPos); - } - return fields; - }; - - /** - * Base class for processing log files. - * - * @param {Array.<Object>} dispatchTable A table used for parsing and - * processing log records. - * - * @constructor - */ - function LogReader(dispatchTable) { - /** - * @type {Array.<Object>} - */ - this.dispatchTable_ = dispatchTable; - - /** - * Current line. - * @type {number} - */ - this.lineNum_ = 0; - - /** - * CSV lines parser. - * @type {CsvParser} - */ - this.csvParser_ = new CsvParser(); - }; - - - /** - * Used for printing error messages. - * - * @param {string} str Error message. - */ - LogReader.prototype.printError = function(str) { - // Do nothing. - }; - - - /** - * Processes a portion of V8 profiler event log. - * - * @param {string} chunk A portion of log. - */ - LogReader.prototype.processLogChunk = function(chunk) { - this.processLog_(chunk.split('\n')); - }; - - - /** - * Processes a line of V8 profiler event log. - * - * @param {string} line A line of log. - */ - LogReader.prototype.processLogLine = function(line) { - this.processLog_([line]); - }; - - - /** - * Processes stack record. - * - * @param {number} pc Program counter. - * @param {number} func JS Function. - * @param {Array.<string>} stack String representation of a stack. - * @return {Array.<number>} Processed stack. - */ - LogReader.prototype.processStack = function(pc, func, stack) { - var fullStack = func ? [pc, func] : [pc]; - var prevFrame = pc; - for (var i = 0, n = stack.length; i < n; ++i) { - var frame = stack[i]; - var firstChar = frame.charAt(0); - if (firstChar == '+' || firstChar == '-') { - // An offset from the previous frame. - prevFrame += parseInt(frame, 16); - fullStack.push(prevFrame); - // Filter out possible 'overflow' string. - } else if (firstChar != 'o') { - fullStack.push(parseInt(frame, 16)); - } - } - return fullStack; - }; - - - /** - * Returns whether a particular dispatch must be skipped. - * - * @param {!Object} dispatch Dispatch record. - * @return {boolean} True if dispatch must be skipped. - */ - LogReader.prototype.skipDispatch = function(dispatch) { - return false; - }; - - - /** - * Does a dispatch of a log record. - * - * @param {Array.<string>} fields Log record. - * @private - */ - LogReader.prototype.dispatchLogRow_ = function(fields) { - // Obtain the dispatch. - var command = fields[0]; - if (!(command in this.dispatchTable_)) return; - - var dispatch = this.dispatchTable_[command]; - - if (dispatch === null || this.skipDispatch(dispatch)) { - return; - } - - // Parse fields. - var parsedFields = []; - for (var i = 0; i < dispatch.parsers.length; ++i) { - var parser = dispatch.parsers[i]; - if (parser === null) { - parsedFields.push(fields[1 + i]); - } else if (typeof parser == 'function') { - parsedFields.push(parser(fields[1 + i])); - } else { - // var-args - parsedFields.push(fields.slice(1 + i)); - break; - } - } - - // Run the processor. - dispatch.processor.apply(this, parsedFields); - }; - - - /** - * Processes log lines. - * - * @param {Array.<string>} lines Log lines. - * @private - */ - LogReader.prototype.processLog_ = function(lines) { - for (var i = 0, n = lines.length; i < n; ++i, ++this.lineNum_) { - var line = lines[i]; - if (!line) { - continue; - } - try { - var fields = this.csvParser_.parseLine(line); - this.dispatchLogRow_(fields); - } catch (e) { - this.printError('line ' + (this.lineNum_ + 1) + ': ' + - (e.message || e)); - } - } - }; - return { - LogReader: LogReader - }; -}); |