d00da47b61
The CompareICStub produces an untagged raw word value, which has to be translated to true or false manually in the TurboFan code. But for lazy bailout after the CompareIC, we immediately go back to fullcodegen or Ignition with the raw value, to a location where both fullcodegen and Ignition expect a boolean value, which might crash or in the worst case (depending on the exact computation inside the CompareIC) could lead to arbitrary memory access. Short-term fix is to use the proper runtime functions (unified with the interpreter now) for comparisons. Next task is to provide optimized versions of these based on the CodeStubAssembler, which can then be used via code stubs in TurboFan or directly in handlers in the interpreter. R=mstarzinger@chromium.org BUG=v8:4788 LOG=n Review URL: https://codereview.chromium.org/1738153002 Cr-Commit-Position: refs/heads/master@{#34335}
26 lines
479 B
JavaScript
26 lines
479 B
JavaScript
// 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
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var f = (function() {
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"use asm";
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function foo(x) {
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return x < x;
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}
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return foo;
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})();
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function deopt(f) {
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return {
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toString : function() {
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%DeoptimizeFunction(f);
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return "2";
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}
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};
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}
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%OptimizeFunctionOnNextCall(f);
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assertFalse(f(deopt(f)));
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