All files / lib/internal v8_prof_polyfill.js

31.79% Statements 55/173
81.82% Branches 9/11
16.67% Functions 1/6
31.79% Lines 55/173

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 1741x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x                                                                                                           1x                                                             20x 20x 20x 20x 20x 20x 20x 20x 20x 7x 7x 13x 13x 20x 35x 20x                                                                        
// Copyright 2012 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.
 
'use strict';
 
/* eslint-disable node-core/prefer-primordials */
/* global console */
 
module.exports = { versionCheck };
 
// Don't execute when required directly instead of being eval'd from
// lib/internal/v8_prof_processor.js.  This way we can test functions
// from this file in isolation.
if (module.id === 'internal/v8_prof_polyfill') return;

// Node polyfill
const fs = require('fs');
const cp = require('child_process');
const { Buffer } = require('buffer');
const os = {
  system: function(name, args) {
    if (process.platform === 'linux' && name === 'nm') {
      // Filter out vdso and vsyscall entries.
      const arg = args[args.length - 1];
      if (arg === '[vdso]' ||
          arg === '[vsyscall]' ||
          /^[0-9a-f]+-[0-9a-f]+$/.test(arg)) {
        return '';
      }
    }
    let out = cp.spawnSync(name, args).stdout.toString();
    // Auto c++filt names, but not [iItT]
    if (process.platform === 'darwin' && name === 'nm') {
      // `nm` prints an error along the lines of "Run xcodebuild -license" and
      // exits when Xcode hasn't been properly installed or when its license
      // hasn't been accepted yet. Basically any mention of xcodebuild in
      // the output means the nm command is non-functional.
      const match = out.match(/(?:^|\n)([^\n]*xcodebuild[^\n]*)(?:\n|$)/);
      // eslint-disable-next-line no-restricted-syntax
      if (match) throw new Error(match[1]);
      out = macCppfiltNm(out);
    }
    return out;
  }
};
const print = console.log;
function read(fileName) {
  return fs.readFileSync(fileName, 'utf8');
}
const quit = process.exit;
// Polyfill "readline()".
// eslint-disable-next-line no-restricted-globals
const logFile = globalThis.arguments[globalThis.arguments.length - 1];
try {
  fs.accessSync(logFile);
} catch {
  console.error('Please provide a valid isolate file as the final argument.');
  process.exit(1);
}
const fd = fs.openSync(logFile, 'r');
const buf = Buffer.allocUnsafe(4096);
const dec = new (require('string_decoder').StringDecoder)('utf-8');
let line = '';

{
  const message = versionCheck(peekline(), process.versions.v8);
  if (message) console.log(message);
}

function peekline() {
  const s = readline();
  line = `${s}\n${line}`;
  return s;
}

function readline() {
  while (true) {
    const lineBreak = line.indexOf('\n');
    if (lineBreak !== -1) {
      const res = line.slice(0, lineBreak);
      line = line.slice(lineBreak + 1);
      return res;
    }
    const bytes = fs.readSync(fd, buf, 0, buf.length);
    line += dec.write(buf.slice(0, bytes));
    if (line.length === 0) {
      return '';
    }
    if (bytes === 0) {
      process.emitWarning(`Profile file ${logFile} is broken`, {
        code: 'BROKEN_PROFILE_FILE',
        detail: `${JSON.stringify(line)} at the file end is broken`
      });
      return '';
    }
  }
}

function versionCheck(firstLine, expected) {
  // v8-version looks like
  // "v8-version,$major,$minor,$build,$patch[,$embedder],$candidate"
  // whereas process.versions.v8 is either "$major.$minor.$build-$embedder" or
  // "$major.$minor.$build.$patch-$embedder".
  firstLine = firstLine.split(',');
  const curVer = expected.split(/[.-]/);
  if ((firstLine.length !== 6 && firstLine.length !== 7) ||
      firstLine[0] !== 'v8-version') {
    return 'Unable to read v8-version from log file.';
  }
  // Compare major, minor and build; ignore the patch and candidate fields.
  for (let i = 0; i < 3; i++)
    if (curVer[i] !== firstLine[i + 1])
      return 'Testing v8 version different from logging version';
}

function macCppfiltNm(out) {
  // Re-grouped copy-paste from `tickprocessor.js`
  const FUNC_RE = /^([0-9a-fA-F]{8,16} [iItT] )(.*)$/gm;
  const CLEAN_RE = /^[0-9a-fA-F]{8,16} [iItT] /;
  let entries = out.match(FUNC_RE);
  if (entries === null)
    return out;

  entries = entries.map((entry) => entry.replace(CLEAN_RE, ''));

  let filtered;
  try {
    filtered = cp.spawnSync('c++filt', [ '-p', '-i' ], {
      input: entries.join('\n')
    }).stdout.toString();
  } catch {
    return out;
  }

  let i = 0;
  filtered = filtered.split('\n');
  return out.replace(FUNC_RE, (all, prefix, postfix) => {
    return prefix + (filtered[i++] || postfix);
  });
}

// eslint-disable-next-line no-restricted-globals
Object.assign(globalThis, {
  os,
  print,
  read,
  quit,
  readline,
});