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// Flags: --expose-internals
'use strict';
// This tests that Environment is tracked in heap snapshots.
require('../common');
const { validateSnapshotNodes } = require('../common/heap');
const assert = require('assert');
// This is just using ContextifyScript as an example here, it can be replaced
// with any BaseObject that we can easily instantiate here and register in
// cleanup hooks.
// These can all be changed to reflect the status of how these objects
// are captured in the snapshot.
const context = require('vm').createScript('const foo = 123');
validateSnapshotNodes('Node / Environment', [{
children: [
cleanupHooksFilter,
{ node_name: 'Node / cleanup_hooks', edge_name: 'cleanup_hooks' },
{ node_name: 'process', edge_name: 'process_object' },
{ node_name: 'Node / IsolateData', edge_name: 'isolate_data' },
]
}]);
function cleanupHooksFilter(edge) {
if (edge.name !== 'cleanup_hooks') {
return false;
}
if (edge.to.type === 'native') {
verifyCleanupHooksInSnapshot(edge.to);
} else {
verifyCleanupHooksInGraph(edge.to);
}
return true;
}
function verifyCleanupHooksInSnapshot(node) {
assert.strictEqual(node.name, 'Node / cleanup_hooks');
const baseObjects = [];
for (const hook of node.outgoingEdges) {
for (const hookEdge of hook.to.outgoingEdges) {
if (hookEdge.name === 'arg') {
baseObjects.push(hookEdge.to);
}
}
}
// Make sure our ContextifyScript show up.
assert(baseObjects.some((node) => node.name === 'Node / ContextifyScript'));
}
function verifyCleanupHooksInGraph(node) {
assert.strictEqual(node.name, 'Node / cleanup_hooks');
const baseObjects = [];
for (const hook of node.edges) {
for (const hookEdge of hook.to.edges) {
if (hookEdge.name === 'arg') {
baseObjects.push(hookEdge.to);
}
}
}
// Make sure our ContextifyScript show up.
assert(baseObjects.some((node) => node.name === 'Node / ContextifyScript'));
}
console.log(context); // Make sure it's not GC'ed