diff options
| author | Konstantin Tokarev <annulen@yandex.ru> | 2016-08-25 19:20:41 +0300 |
|---|---|---|
| committer | Konstantin Tokarev <annulen@yandex.ru> | 2017-02-02 12:30:55 +0000 |
| commit | 6882a04fb36642862b11efe514251d32070c3d65 (patch) | |
| tree | b7959826000b061fd5ccc7512035c7478742f7b0 /Source/JavaScriptCore/bytecode/ExecutionCounter.h | |
| parent | ab6df191029eeeb0b0f16f127d553265659f739e (diff) | |
Imported QtWebKit TP3 (git b57bc6801f1876c3220d5a4bfea33d620d477443)
Change-Id: I3b1d8a2808782c9f34d50240000e20cb38d3680f
Reviewed-by: Konstantin Tokarev <annulen@yandex.ru>
Diffstat (limited to 'Source/JavaScriptCore/bytecode/ExecutionCounter.h')
| -rw-r--r-- | Source/JavaScriptCore/bytecode/ExecutionCounter.h | 58 |
1 files changed, 41 insertions, 17 deletions
diff --git a/Source/JavaScriptCore/bytecode/ExecutionCounter.h b/Source/JavaScriptCore/bytecode/ExecutionCounter.h index c755c0445..5002c6c67 100644 --- a/Source/JavaScriptCore/bytecode/ExecutionCounter.h +++ b/Source/JavaScriptCore/bytecode/ExecutionCounter.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2012 Apple Inc. All rights reserved. + * Copyright (C) 2012, 2014 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -35,46 +35,67 @@ namespace JSC { class CodeBlock; +enum CountingVariant { + CountingForBaseline, + CountingForUpperTiers +}; + +double applyMemoryUsageHeuristics(int32_t value, CodeBlock*); +int32_t applyMemoryUsageHeuristicsAndConvertToInt(int32_t value, CodeBlock*); + +inline int32_t formattedTotalExecutionCount(float value) +{ + union { + int32_t i; + float f; + } u; + u.f = value; + return u.i; +} + +template<CountingVariant countingVariant> class ExecutionCounter { public: ExecutionCounter(); + void forceSlowPathConcurrently(); // If you use this, checkIfThresholdCrossedAndSet() may still return false. bool checkIfThresholdCrossedAndSet(CodeBlock*); void setNewThreshold(int32_t threshold, CodeBlock*); void deferIndefinitely(); double count() const { return static_cast<double>(m_totalCount) + m_counter; } void dump(PrintStream&) const; - static double applyMemoryUsageHeuristics(int32_t value, CodeBlock*); - static int32_t applyMemoryUsageHeuristicsAndConvertToInt(int32_t value, CodeBlock*); + + static int32_t maximumExecutionCountsBetweenCheckpoints() + { + switch (countingVariant) { + case CountingForBaseline: + return Options::maximumExecutionCountsBetweenCheckpointsForBaseline(); + case CountingForUpperTiers: + return Options::maximumExecutionCountsBetweenCheckpointsForUpperTiers(); + default: + RELEASE_ASSERT_NOT_REACHED(); + return 0; + } + } + template<typename T> static T clippedThreshold(JSGlobalObject* globalObject, T threshold) { int32_t maxThreshold; if (Options::randomizeExecutionCountsBetweenCheckpoints()) - maxThreshold = globalObject->weakRandomInteger() % Options::maximumExecutionCountsBetweenCheckpoints(); + maxThreshold = globalObject->weakRandomInteger() % maximumExecutionCountsBetweenCheckpoints(); else - maxThreshold = Options::maximumExecutionCountsBetweenCheckpoints(); + maxThreshold = maximumExecutionCountsBetweenCheckpoints(); if (threshold > maxThreshold) threshold = maxThreshold; return threshold; } - static int32_t formattedTotalCount(float value) - { - union { - int32_t i; - float f; - } u; - u.f = value; - return u.i; - } - private: bool hasCrossedThreshold(CodeBlock*) const; bool setThreshold(CodeBlock*); void reset(); public: - // NB. These are intentionally public because it will be modified from machine code. // This counter is incremented by the JIT or LLInt. It starts out negative and is @@ -89,11 +110,14 @@ public: // m_counter. float m_totalCount; - // This is the threshold we were originally targetting, without any correction for + // This is the threshold we were originally targeting, without any correction for // the memory usage heuristics. int32_t m_activeThreshold; }; +typedef ExecutionCounter<CountingForBaseline> BaselineExecutionCounter; +typedef ExecutionCounter<CountingForUpperTiers> UpperTierExecutionCounter; + } // namespace JSC #endif // ExecutionCounter_h |