49 lines
1.5 KiB
JavaScript
49 lines
1.5 KiB
JavaScript
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// Copyright 2022 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// Flags: --allow-natives-syntax --expose-gc
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// Flags: --no-sparkplug --no-maglev --no-turbofan
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// Flags: --lazy --flush-bytecode
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// Helper that, given a template object, simply returns it.
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function get_template_object(obj) {
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return obj;
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}
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function foo_factory() {
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// The SFI for foo is held by the bytecode array of foo_factory, so will be
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// collected if foo_factory's bytecode is flushed.
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return function foo() {
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return get_template_object``
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}
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}
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// Create foo in another function to avoid it leaking on the global object or
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// top-level script locals, and accidentally being kept alive.
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function get_foo_template_object() {
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let foo = foo_factory();
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return foo();
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}
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assertTrue(isLazy(foo_factory));
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let inital_template_object = get_foo_template_object();
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assertEquals(inital_template_object, get_foo_template_object(),
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"Template object identity should be preserved");
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// Force a flush of foo_factory, so that the SharedFunctionInfo of foo can be
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// collected.
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%ForceFlush(foo_factory);
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assertTrue(isLazy(foo_factory));
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// Do a few more GCs to allow weak maps to be cleared.
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gc();
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gc();
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gc();
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// Flushing foo_factory and GCing foo should not affect the persisted reference
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// identity of the template object inside foo.
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assertSame(inital_template_object, get_foo_template_object(),
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"Template object identity should be preserved");
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