c1d7150e56Creates a SharedArrayBuffer from externally managed memory. Fixes: https://github.com/nodejs/node/issues/62259 PR-URL: https://github.com/nodejs/node/pull/62623 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Chengzhong Wu <legendecas@gmail.com> Reviewed-By: Vladimir Morozov <vmorozov@microsoft.com> Reviewed-By: Robert Nagy <ronagy@icloud.com>
46 lines
1.6 KiB
JavaScript
46 lines
1.6 KiB
JavaScript
'use strict';
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// Flags: --expose-gc --no-concurrent-array-buffer-sweeping
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const common = require('../../common');
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const binding = require(`./build/${common.buildType}/test_buffer`);
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const assert = require('assert');
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const util = require('util');
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const tick = util.promisify(require('../../common/tick'));
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(async function() {
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assert.strictEqual(binding.newBuffer().toString(), binding.theText);
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assert.strictEqual(binding.newExternalBuffer().toString(), binding.theText);
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console.log('gc1');
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global.gc();
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assert.strictEqual(binding.getDeleterCallCount(), 0);
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await tick(10);
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assert.strictEqual(binding.getDeleterCallCount(), 1);
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assert.strictEqual(binding.copyBuffer().toString(), binding.theText);
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let buffer = binding.staticBuffer();
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assert.strictEqual(binding.bufferHasInstance(buffer), true);
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assert.strictEqual(binding.bufferInfo(buffer), true);
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buffer = null;
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global.gc();
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assert.strictEqual(binding.getDeleterCallCount(), 1);
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await tick(10);
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console.log('gc2');
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assert.strictEqual(binding.getDeleterCallCount(), 2);
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// Caveat emptor: it's indeterminate when the SharedArrayBuffer's backing
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// store is reclaimed; at least some of the time it happens even before
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// calling gc().
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let sab = binding.newExternalSharedArrayBuffer();
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assert(util.types.isSharedArrayBuffer(sab));
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sab = null;
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global.gc();
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await tick(10);
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console.log('gc3');
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assert.strictEqual(binding.getDeleterCallCount(), 3);
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// To test this doesn't crash
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binding.invalidObjectAsBuffer({});
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const testBuffer = binding.bufferFromArrayBuffer();
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assert(testBuffer instanceof Buffer, 'Expected a Buffer');
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})().then(common.mustCall());
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