Index: resources/inspector/logreader.js |
=================================================================== |
--- resources/inspector/logreader.js (revision 33840) |
+++ resources/inspector/logreader.js (working copy) |
@@ -1,320 +0,0 @@ |
-// Copyright 2009 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. |
- |
-/** |
- * @fileoverview Log Reader is used to process log file produced by V8. |
- */ |
- |
-// Initlialize namespaces |
-var devtools = devtools || {}; |
-devtools.profiler = devtools.profiler || {}; |
- |
- |
-/** |
- * Base class for processing log files. |
- * |
- * @param {Array.<Object>} dispatchTable A table used for parsing and processing |
- * log records. |
- * @constructor |
- */ |
-devtools.profiler.LogReader = function(dispatchTable) { |
- /** |
- * @type {Array.<Object>} |
- */ |
- this.dispatchTable_ = dispatchTable; |
- this.dispatchTable_['alias'] = |
- { parsers: [null, null], processor: this.processAlias_ }; |
- this.dispatchTable_['repeat'] = |
- { parsers: [parseInt, 'var-args'], processor: this.processRepeat_, |
- backrefs: true }; |
- |
- /** |
- * A key-value map for aliases. Translates short name -> full name. |
- * @type {Object} |
- */ |
- this.aliases_ = {}; |
- |
- /** |
- * A key-value map for previous address values. |
- * @type {Object} |
- */ |
- this.prevAddresses_ = {}; |
- |
- /** |
- * A key-value map for events than can be backreference-compressed. |
- * @type {Object} |
- */ |
- this.backRefsCommands_ = {}; |
- this.initBackRefsCommands_(); |
- |
- /** |
- * Back references for decompression. |
- * @type {Array.<string>} |
- */ |
- this.backRefs_ = []; |
-}; |
- |
- |
-/** |
- * Creates a parser for an address entry. |
- * |
- * @param {string} addressTag Address tag to perform offset decoding. |
- * @return {function(string):number} Address parser. |
- */ |
-devtools.profiler.LogReader.prototype.createAddressParser = function( |
- addressTag) { |
- var self = this; |
- return (function (str) { |
- var value = parseInt(str, 16); |
- var firstChar = str.charAt(0); |
- if (firstChar == '+' || firstChar == '-') { |
- var addr = self.prevAddresses_[addressTag]; |
- addr += value; |
- self.prevAddresses_[addressTag] = addr; |
- return addr; |
- } else if (firstChar != '0' || str.charAt(1) != 'x') { |
- self.prevAddresses_[addressTag] = value; |
- } |
- return value; |
- }); |
-}; |
- |
- |
-/** |
- * Expands an alias symbol, if applicable. |
- * |
- * @param {string} symbol Symbol to expand. |
- * @return {string} Expanded symbol, or the input symbol itself. |
- */ |
-devtools.profiler.LogReader.prototype.expandAlias = function(symbol) { |
- return symbol in this.aliases_ ? this.aliases_[symbol] : symbol; |
-}; |
- |
- |
-/** |
- * Used for printing error messages. |
- * |
- * @param {string} str Error message. |
- */ |
-devtools.profiler.LogReader.prototype.printError = function(str) { |
- // Do nothing. |
-}; |
- |
- |
-/** |
- * Processes a portion of V8 profiler event log. |
- * |
- * @param {string} chunk A portion of log. |
- */ |
-devtools.profiler.LogReader.prototype.processLogChunk = function(chunk) { |
- this.processLog_(chunk.split('\n')); |
-}; |
- |
- |
-/** |
- * Processes stack record. |
- * |
- * @param {number} pc Program counter. |
- * @param {Array.<string>} stack String representation of a stack. |
- * @return {Array.<number>} Processed stack. |
- */ |
-devtools.profiler.LogReader.prototype.processStack = function(pc, stack) { |
- var fullStack = [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. |
- */ |
-devtools.profiler.LogReader.prototype.skipDispatch = function(dispatch) { |
- return false; |
-}; |
- |
- |
-/** |
- * Does a dispatch of a log record. |
- * |
- * @param {Array.<string>} fields Log record. |
- * @private |
- */ |
-devtools.profiler.LogReader.prototype.dispatchLogRow_ = function(fields) { |
- // Obtain the dispatch. |
- var command = fields[0]; |
- if (!(command in this.dispatchTable_)) { |
- throw new Error('unknown command: ' + command); |
- } |
- 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); |
-}; |
- |
- |
-/** |
- * Decompresses a line if it was backreference-compressed. |
- * |
- * @param {string} line Possibly compressed line. |
- * @return {string} Decompressed line. |
- * @private |
- */ |
-devtools.profiler.LogReader.prototype.expandBackRef_ = function(line) { |
- var backRefPos; |
- // Filter out case when a regexp is created containing '#'. |
- if (line.charAt(line.length - 1) != '"' |
- && (backRefPos = line.lastIndexOf('#')) != -1) { |
- var backRef = line.substr(backRefPos + 1); |
- var backRefIdx = parseInt(backRef, 10) - 1; |
- var colonPos = backRef.indexOf(':'); |
- var backRefStart = |
- colonPos != -1 ? parseInt(backRef.substr(colonPos + 1), 10) : 0; |
- line = line.substr(0, backRefPos) + |
- this.backRefs_[backRefIdx].substr(backRefStart); |
- } |
- this.backRefs_.unshift(line); |
- if (this.backRefs_.length > 10) { |
- this.backRefs_.length = 10; |
- } |
- return line; |
-}; |
- |
- |
-/** |
- * Initializes the map of backward reference compressible commands. |
- * @private |
- */ |
-devtools.profiler.LogReader.prototype.initBackRefsCommands_ = function() { |
- for (var event in this.dispatchTable_) { |
- var dispatch = this.dispatchTable_[event]; |
- if (dispatch && dispatch.backrefs) { |
- this.backRefsCommands_[event] = true; |
- } |
- } |
-}; |
- |
- |
-/** |
- * Processes alias log record. Adds an alias to a corresponding map. |
- * |
- * @param {string} symbol Short name. |
- * @param {string} expansion Long name. |
- * @private |
- */ |
-devtools.profiler.LogReader.prototype.processAlias_ = function( |
- symbol, expansion) { |
- if (expansion in this.dispatchTable_) { |
- this.dispatchTable_[symbol] = this.dispatchTable_[expansion]; |
- if (expansion in this.backRefsCommands_) { |
- this.backRefsCommands_[symbol] = true; |
- } |
- } else { |
- this.aliases_[symbol] = expansion; |
- } |
-}; |
- |
- |
-/** |
- * Processes log lines. |
- * |
- * @param {Array.<string>} lines Log lines. |
- * @private |
- */ |
-devtools.profiler.LogReader.prototype.processLog_ = function(lines) { |
- var csvParser = new devtools.profiler.CsvParser(); |
- try { |
- for (var i = 0, n = lines.length; i < n; ++i) { |
- var line = lines[i]; |
- if (!line) { |
- continue; |
- } |
- if (line.charAt(0) == '#' || |
- line.substr(0, line.indexOf(',')) in this.backRefsCommands_) { |
- line = this.expandBackRef_(line); |
- } |
- var fields = csvParser.parseLine(line); |
- this.dispatchLogRow_(fields); |
- } |
- } catch (e) { |
- // An error on the last line is acceptable since log file can be truncated. |
- if (i < n - 1) { |
- this.printError('line ' + (i + 1) + ': ' + (e.message || e)); |
- throw e; |
- } |
- } |
-}; |
- |
- |
-/** |
- * Processes repeat log record. Expands it according to calls count and |
- * invokes processing. |
- * |
- * @param {number} count Count. |
- * @param {Array.<string>} cmd Parsed command. |
- * @private |
- */ |
-devtools.profiler.LogReader.prototype.processRepeat_ = function(count, cmd) { |
- // Replace the repeat-prefixed command from backrefs list with a non-prefixed. |
- this.backRefs_[0] = cmd.join(','); |
- for (var i = 0; i < count; ++i) { |
- this.dispatchLogRow_(cmd); |
- } |
-}; |