38 lines
1.1 KiB
JavaScript
38 lines
1.1 KiB
JavaScript
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// Copyright 2016 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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// Flags: --allow-natives-syntax --gc-global
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(function TestGCDuringToObjectForWith() {
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function f(o) {
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if (o == 'warmup') { return g() }
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with (o) { return x }
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}
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function g() {
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// Only a marker function serving as weak embedded object.
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}
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// Warm up 'f' so that weak embedded object 'g' will be used.
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f('warmup');
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f('warmup');
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g = null;
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// Test that 'f' behaves correctly unoptimized.
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assertEquals(23, f({ x:23 }));
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assertEquals(42, f({ x:42 }));
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// Test that 'f' behaves correctly optimized.
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%OptimizeFunctionOnNextCall(f);
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assertEquals(65, f({ x:65 }));
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// Test that 'f' behaves correctly on numbers.
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Number.prototype.x = 99;
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assertEquals(99, f(0));
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// Make sure the next [[ToObject]] allocation triggers GC. This in turn will
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// deoptimize 'f' because it has the weak embedded object 'g' in the code.
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%SetAllocationTimeout(1000, 1, false);
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assertEquals(99, f(0));
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})();
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