a1475dae5d
Until now, TF-generated code stubs piggy-backed off of the builtin context. Since generation of code stubs is lazy, stubs generated at different times in different native contexts would contain embedded pointers different builtin contexts, leading to cross-context references and memory leaks. After this CL, all TF-generated code stubs are generated inside a internal thinned-out, native context that lives solely for the purpose of hosting generated code stubs. Review URL: https://codereview.chromium.org/1213203007 Cr-Commit-Position: refs/heads/master@{#29593}
62 lines
2.9 KiB
JavaScript
62 lines
2.9 KiB
JavaScript
// Copyright 2015 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --allow-natives-syntax --noalways-opt --turbo-filter=*
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var stubs = %GetCodeStubExportsObject();
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const kExtraTypeFeedbackMinusZeroSentinel = 1;
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const kFirstJSFunctionTypeFeedbackIndex = 5;
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const kFirstSlotExtraTypeFeedbackIndex = 5;
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(function() {
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var stub1 = stubs.MathFloorStub("MathFloorStub", 1);
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var tempForTypeVector = function(d) {
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return Math.round(d);
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}
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tempForTypeVector(5);
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var tv = %GetTypeFeedbackVector(tempForTypeVector);
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var floorFunc1 = function(v, first) {
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if (first) return;
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return stub1(stub1, kFirstSlotExtraTypeFeedbackIndex - 1, tv, undefined, v);
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};
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%OptimizeFunctionOnNextCall(stub1);
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floorFunc1(5, true);
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%FixedArraySet(tv, kFirstSlotExtraTypeFeedbackIndex - 1, stub1);
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assertTrue(kExtraTypeFeedbackMinusZeroSentinel !==
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%FixedArrayGet(tv, kFirstSlotExtraTypeFeedbackIndex));
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assertEquals(5.0, floorFunc1(5.5));
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assertTrue(kExtraTypeFeedbackMinusZeroSentinel !==
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%FixedArrayGet(tv, kFirstSlotExtraTypeFeedbackIndex));
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// Executing floor such that it returns -0 should set the proper sentinel in
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// the feedback vector.
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assertEquals(-Infinity, 1/floorFunc1(-0));
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assertEquals(kExtraTypeFeedbackMinusZeroSentinel,
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%FixedArrayGet(tv, kFirstSlotExtraTypeFeedbackIndex));
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%ClearFunctionTypeFeedback(floorFunc1);
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})();
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