2fb168f756
Heap dumps are used for analyzing the relationship between objects that keep each other alive, so that retainers of memory can be detected and memory leaks fixed.6e60ab744ebroke this for a wide range of `BaseObject` instances. Marking all `BaseObject`s, including weak ones, as children of `Realm` and `Environment` instances gives the incorrect impression that they are held alive by those objects, effectively hiding the "real" set of strong roots that keep other objects alive through GC. An upcoming change in V8 will allow us to represent this relationship between `Realm` and `Environment` and its `BaseObject` and `CppgcMixin` instances properly. Refs:e37cadf114Refs: https://github.com/nodejs/node/pull/57417 Signed-off-by: Anna Henningsen <anna@addaleax.net> PR-URL: https://github.com/nodejs/node/pull/63842 Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
47 lines
1.6 KiB
JavaScript
47 lines
1.6 KiB
JavaScript
'use strict';
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// This tests heap snapshot integration of zlib stream.
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const common = require('../common');
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const assert = require('assert');
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const { validateByRetainingPath, validateByRetainingPathFromNodes, getRetainingNodes } = require('../common/heap');
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const zlib = require('zlib');
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// Before zlib stream is created, no ZlibStream should be created.
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{
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const nodes = validateByRetainingPath('Node / ZlibStream', []);
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assert.strictEqual(nodes.length, 0);
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}
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const gzip = zlib.createGzip();
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// After zlib stream is created, a ZlibStream should be created.
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{
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const streams = validateByRetainingPath('Node / ZlibStream', []);
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validateByRetainingPathFromNodes(streams, 'Node / ZlibStream', [
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{ node_name: 'Zlib', edge_name: 'native_to_javascript' },
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]);
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// No entry for memory because zlib memory is initialized lazily.
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const withMemory = validateByRetainingPathFromNodes(streams, 'Node / ZlibStream', [
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{ node_name: 'Node / zlib_memory', edge_name: 'zlib_memory' },
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], true);
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assert.strictEqual(withMemory.length, 0);
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}
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{
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// Assert that the `ZlibStream` has no unexpected connections
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// to other `Node / ...` nodes.
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const contexts = validateByRetainingPath('Node / ZlibContext', []);
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assert.deepStrictEqual(
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getRetainingNodes(contexts[0], (node) => node.name?.startsWith('Node /'))
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.map((node) => node.name).sort(), [
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'Node / ZlibContext',
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'Node / ZlibStream',
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]);
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}
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// After zlib stream is written, zlib_memory should be created.
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gzip.write('hello world', common.mustCall(() => {
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validateByRetainingPath('Node / ZlibStream', [
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{ node_name: 'Node / zlib_memory', edge_name: 'zlib_memory' },
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]);
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}));
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