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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
// Flags: --expose_gc
require('../common');
const assert = require('assert');
const tmpdir = require('../common/tmpdir');
function newBuffer(size, value) {
const buffer = Buffer.allocUnsafe(size);
while (size--) {
buffer[size] = value;
}
buffer[buffer.length - 1] = 0x0a;
return buffer;
}
const fs = require('fs');
const testFileName = require('path').join(tmpdir.path, 'GH-814_testFile.txt');
const testFileFD = fs.openSync(testFileName, 'w');
console.log(testFileName);
const kBufSize = 128 * 1024;
let PASS = true;
const neverWrittenBuffer = newBuffer(kBufSize, 0x2e); // 0x2e === '.'
const bufPool = [];
const tail = require('child_process').spawn('tail', ['-f', testFileName]);
tail.stdout.on('data', tailCB);
function tailCB(data) {
PASS = !data.toString().includes('.');
}
const timeToQuit = Date.now() + 8e3; // Test during no more than this seconds.
(function main() {
if (PASS) {
fs.write(testFileFD, newBuffer(kBufSize, 0x61), 0, kBufSize, -1, cb);
global.gc();
const nuBuf = Buffer.allocUnsafe(kBufSize);
neverWrittenBuffer.copy(nuBuf);
if (bufPool.push(nuBuf) > 100) {
bufPool.length = 0;
}
} else {
throw new Error("Buffer GC'ed test -> FAIL");
}
if (Date.now() < timeToQuit) {
process.nextTick(main);
} else {
tail.kill();
console.log("Buffer GC'ed test -> PASS (OK)");
}
})();
function cb(err, written) {
assert.ifError(err);
}
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