Srdjan Mitrovic
fe4a5d7672
We introduce 3 invalidation generation counters: CHA, field and library prefixes. If one of the counters was incremented during compilation, and is relevant for that compilation, the code installation is skipped since that code may have become invalid in the meantime. Add BackgroundCompilationResult that remembers the 3 invalidation generations. The generational counter can rollover, which is OK. BUG= R=asiva@google.com Review URL: https://codereview.chromium.org/1418813008 .
42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef VM_WEAK_CODE_H_
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#define VM_WEAK_CODE_H_
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#include "vm/allocation.h"
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#include "vm/globals.h"
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namespace dart {
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class Array;
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class Code;
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// Helper class to handle an array of code weak properties. Implements
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// registration and disabling of stored code objects.
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class WeakCodeReferences : public ValueObject {
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public:
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explicit WeakCodeReferences(const Array& value) : array_(value) {}
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virtual ~WeakCodeReferences() {}
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void Register(const Code& value);
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virtual void UpdateArrayTo(const Array& array) = 0;
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virtual void ReportDeoptimization(const Code& code) = 0;
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virtual void ReportSwitchingCode(const Code& code) = 0;
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virtual void IncrementInvalidationGen() = 0;
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static bool IsOptimizedCode(const Array& dependent_code, const Code& code);
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void DisableCode();
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private:
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const Array& array_;
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DISALLOW_COPY_AND_ASSIGN(WeakCodeReferences);
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};
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} // namespace dart
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#endif // VM_WEAK_CODE_H_
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