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author | Ryan Dahl <ry@tinyclouds.org> | 2010-12-16 11:52:08 -0800 |
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committer | Ryan Dahl <ry@tinyclouds.org> | 2010-12-16 11:52:08 -0800 |
commit | ea700a8851023a1967083f22daa40f4c7a4366bf (patch) | |
tree | adea168439fab99865adaf8589b34fe914bc1994 /deps/v8/tools/logreader.js | |
parent | 632da2a393a633f8da432096b14bec5915480115 (diff) | |
download | android-node-v8-ea700a8851023a1967083f22daa40f4c7a4366bf.tar.gz android-node-v8-ea700a8851023a1967083f22daa40f4c7a4366bf.tar.bz2 android-node-v8-ea700a8851023a1967083f22daa40f4c7a4366bf.zip |
Upgrade V8 to 3.0.2
Diffstat (limited to 'deps/v8/tools/logreader.js')
-rw-r--r-- | deps/v8/tools/logreader.js | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/deps/v8/tools/logreader.js b/deps/v8/tools/logreader.js index 50e3aa45c5..b2aca73d21 100644 --- a/deps/v8/tools/logreader.js +++ b/deps/v8/tools/logreader.js @@ -46,6 +46,36 @@ 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_ = []; /** * Current line. @@ -62,6 +92,42 @@ devtools.profiler.LogReader = function(dispatchTable) { /** + * 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. @@ -168,6 +234,68 @@ devtools.profiler.LogReader.prototype.dispatchLogRow_ = function(fields) { /** + * 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. @@ -180,6 +308,10 @@ devtools.profiler.LogReader.prototype.processLog_ = function(lines) { continue; } try { + if (line.charAt(0) == '#' || + line.substr(0, line.indexOf(',')) in this.backRefsCommands_) { + line = this.expandBackRef_(line); + } var fields = this.csvParser_.parseLine(line); this.dispatchLogRow_(fields); } catch (e) { @@ -187,3 +319,20 @@ devtools.profiler.LogReader.prototype.processLog_ = function(lines) { } } }; + + +/** + * 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); + } +}; |