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/*
* Copyright (C) 2012, 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ArrayProfile.h"
#include "CodeBlock.h"
#include "JSCInlines.h"
#include <wtf/CommaPrinter.h>
#include <wtf/StringPrintStream.h>
namespace JSC {
void dumpArrayModes(PrintStream& out, ArrayModes arrayModes)
{
if (!arrayModes) {
out.print("<empty>");
return;
}
if (arrayModes == ALL_ARRAY_MODES) {
out.print("TOP");
return;
}
CommaPrinter comma("|");
if (arrayModes & asArrayModes(NonArray))
out.print(comma, "NonArray");
if (arrayModes & asArrayModes(NonArrayWithInt32))
out.print(comma, "NonArrayWithInt32");
if (arrayModes & asArrayModes(NonArrayWithDouble))
out.print(comma, "NonArrayWithDouble");
if (arrayModes & asArrayModes(NonArrayWithContiguous))
out.print(comma, "NonArrayWithContiguous");
if (arrayModes & asArrayModes(NonArrayWithArrayStorage))
out.print(comma, "NonArrayWithArrayStorage");
if (arrayModes & asArrayModes(NonArrayWithSlowPutArrayStorage))
out.print(comma, "NonArrayWithSlowPutArrayStorage");
if (arrayModes & asArrayModes(ArrayClass))
out.print(comma, "ArrayClass");
if (arrayModes & asArrayModes(ArrayWithUndecided))
out.print(comma, "ArrayWithUndecided");
if (arrayModes & asArrayModes(ArrayWithInt32))
out.print(comma, "ArrayWithInt32");
if (arrayModes & asArrayModes(ArrayWithDouble))
out.print(comma, "ArrayWithDouble");
if (arrayModes & asArrayModes(ArrayWithContiguous))
out.print(comma, "ArrayWithContiguous");
if (arrayModes & asArrayModes(ArrayWithArrayStorage))
out.print(comma, "ArrayWithArrayStorage");
if (arrayModes & asArrayModes(ArrayWithSlowPutArrayStorage))
out.print(comma, "ArrayWithSlowPutArrayStorage");
if (arrayModes & Int8ArrayMode)
out.print(comma, "Int8ArrayMode");
if (arrayModes & Int16ArrayMode)
out.print(comma, "Int16ArrayMode");
if (arrayModes & Int32ArrayMode)
out.print(comma, "Int32ArrayMode");
if (arrayModes & Uint8ArrayMode)
out.print(comma, "Uint8ArrayMode");
if (arrayModes & Uint8ClampedArrayMode)
out.print(comma, "Uint8ClampedArrayMode");
if (arrayModes & Uint16ArrayMode)
out.print(comma, "Uint16ArrayMode");
if (arrayModes & Uint32ArrayMode)
out.print(comma, "Uint32ArrayMode");
if (arrayModes & Float32ArrayMode)
out.print(comma, "Float32ArrayMode");
if (arrayModes & Float64ArrayMode)
out.print(comma, "Float64ArrayMode");
}
void ArrayProfile::computeUpdatedPrediction(const ConcurrentJSLocker& locker, CodeBlock* codeBlock)
{
if (!m_lastSeenStructureID)
return;
Structure* lastSeenStructure = codeBlock->heap()->structureIDTable().get(m_lastSeenStructureID);
computeUpdatedPrediction(locker, codeBlock, lastSeenStructure);
m_lastSeenStructureID = 0;
}
void ArrayProfile::computeUpdatedPrediction(const ConcurrentJSLocker&, CodeBlock* codeBlock, Structure* lastSeenStructure)
{
m_observedArrayModes |= arrayModeFromStructure(lastSeenStructure);
if (!m_didPerformFirstRunPruning
&& hasTwoOrMoreBitsSet(m_observedArrayModes)) {
m_observedArrayModes = arrayModeFromStructure(lastSeenStructure);
m_didPerformFirstRunPruning = true;
}
m_mayInterceptIndexedAccesses |=
lastSeenStructure->typeInfo().interceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero();
JSGlobalObject* globalObject = codeBlock->globalObject();
if (!globalObject->isOriginalArrayStructure(lastSeenStructure)
&& !globalObject->isOriginalTypedArrayStructure(lastSeenStructure))
m_usesOriginalArrayStructures = false;
}
CString ArrayProfile::briefDescription(const ConcurrentJSLocker& locker, CodeBlock* codeBlock)
{
computeUpdatedPrediction(locker, codeBlock);
return briefDescriptionWithoutUpdating(locker);
}
CString ArrayProfile::briefDescriptionWithoutUpdating(const ConcurrentJSLocker&)
{
StringPrintStream out;
bool hasPrinted = false;
if (m_observedArrayModes) {
if (hasPrinted)
out.print(", ");
out.print(ArrayModesDump(m_observedArrayModes));
hasPrinted = true;
}
if (m_mayStoreToHole) {
if (hasPrinted)
out.print(", ");
out.print("Hole");
hasPrinted = true;
}
if (m_outOfBounds) {
if (hasPrinted)
out.print(", ");
out.print("OutOfBounds");
hasPrinted = true;
}
if (m_mayInterceptIndexedAccesses) {
if (hasPrinted)
out.print(", ");
out.print("Intercept");
hasPrinted = true;
}
if (m_usesOriginalArrayStructures) {
if (hasPrinted)
out.print(", ");
out.print("Original");
hasPrinted = true;
}
UNUSED_PARAM(hasPrinted);
return out.toCString();
}
} // namespace JSC