190af788af
Reduce the dispatching overhead in the hottest loop when parsing log-lines. - Using a JSMap we can avoid internalizing strings - Preprocess the dispatch table and only have varArgs or functions as parsers - string[] seems to be slightly faster than string.charAt() Bug: v8:10644 Change-Id: I03b13bdeecda1ad037191ff74e05142ceeb6533c Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3571890 Reviewed-by: Patrick Thier <pthier@chromium.org> Commit-Queue: Camillo Bruni <cbruni@chromium.org> Cr-Commit-Position: refs/heads/main@{#79816}
69 lines
2.1 KiB
JavaScript
69 lines
2.1 KiB
JavaScript
// Copyright 2016 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import { LogReader, parseString } from "./logreader.mjs";
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import { CodeMap, CodeEntry } from "./codemap.mjs";
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export {
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ArgumentsProcessor, LinuxCppEntriesProvider,
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WindowsCppEntriesProvider, MacOSCppEntriesProvider,
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} from "./tickprocessor.mjs";
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export class CppProcessor extends LogReader {
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constructor(cppEntriesProvider, timedRange, pairwiseTimedRange) {
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super(timedRange, pairwiseTimedRange);
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this.setDispatchTable({
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__proto__: null,
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'shared-library': {
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parsers: [parseString, parseInt, parseInt, parseInt],
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processor: this.processSharedLibrary }
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});
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this.cppEntriesProvider_ = cppEntriesProvider;
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this.codeMap_ = new CodeMap();
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this.lastLogFileName_ = null;
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}
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/**
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* @override
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*/
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printError(str) {
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console.log(str);
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}
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processLogFile(fileName) {
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this.lastLogFileName_ = fileName;
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let line;
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while (line = readline()) {
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this.processLogLine(line);
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}
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}
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processLogFileInTest(fileName) {
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// Hack file name to avoid dealing with platform specifics.
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this.lastLogFileName_ = 'v8.log';
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const contents = d8.file.read(fileName);
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this.processLogChunk(contents);
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}
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processSharedLibrary(name, startAddr, endAddr, aslrSlide) {
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const self = this;
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const libFuncs = this.cppEntriesProvider_.parseVmSymbols(
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name, startAddr, endAddr, aslrSlide, function(fName, fStart, fEnd) {
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const entry = new CodeEntry(fEnd - fStart, fName, 'CPP');
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self.codeMap_.addStaticCode(fStart, entry);
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});
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}
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dumpCppSymbols() {
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const staticEntries = this.codeMap_.getAllStaticEntriesWithAddresses();
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const total = staticEntries.length;
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for (let i = 0; i < total; ++i) {
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const entry = staticEntries[i];
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const printValues = ['cpp', `0x${entry[0].toString(16)}`, entry[1].size,
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`"${entry[1].name}"`];
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console.log(printValues.join(','));
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}
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}
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}
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