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/*
* Copyright (C) 2013-2015 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.
*/
#ifndef DFGDesiredWatchpoints_h
#define DFGDesiredWatchpoints_h
#if ENABLE(DFG_JIT)
#include "CodeOrigin.h"
#include "DFGCommonData.h"
#include "DFGDesiredInferredType.h"
#include "InferredValue.h"
#include "JSArrayBufferView.h"
#include "ObjectPropertyCondition.h"
#include "Watchpoint.h"
#include <wtf/CommaPrinter.h>
#include <wtf/HashSet.h>
namespace JSC { namespace DFG {
class Graph;
template<typename T>
struct SetPointerAdaptor {
static void add(CodeBlock* codeBlock, T set, CommonData& common)
{
return set->add(common.watchpoints.add(codeBlock));
}
static bool hasBeenInvalidated(T set) { return set->hasBeenInvalidated(); }
static void dumpInContext(PrintStream& out, T set, DumpContext*)
{
out.print(RawPointer(set));
}
};
struct InferredValueAdaptor {
static void add(CodeBlock*, InferredValue*, CommonData&);
static bool hasBeenInvalidated(InferredValue* inferredValue)
{
return inferredValue->hasBeenInvalidated();
}
static void dumpInContext(PrintStream& out, InferredValue* inferredValue, DumpContext*)
{
out.print(RawPointer(inferredValue));
}
};
struct ArrayBufferViewWatchpointAdaptor {
static void add(CodeBlock*, JSArrayBufferView*, CommonData&);
static bool hasBeenInvalidated(JSArrayBufferView* view)
{
return !view->length();
}
static void dumpInContext(PrintStream& out, JSArrayBufferView* view, DumpContext* context)
{
out.print(inContext(JSValue(view), context));
}
};
struct AdaptiveStructureWatchpointAdaptor {
static void add(CodeBlock*, const ObjectPropertyCondition&, CommonData&);
static bool hasBeenInvalidated(const ObjectPropertyCondition& key)
{
return !key.isWatchable();
}
static void dumpInContext(
PrintStream& out, const ObjectPropertyCondition& key, DumpContext* context)
{
out.print(inContext(key, context));
}
};
struct InferredTypeAdaptor {
static void add(CodeBlock*, const DesiredInferredType&, CommonData&);
static bool hasBeenInvalidated(const DesiredInferredType& key)
{
return !key.isStillValid();
}
static void dumpInContext(PrintStream& out, const DesiredInferredType& key, DumpContext* context)
{
out.print(inContext(key, context));
}
};
template<typename WatchpointSetType, typename Adaptor = SetPointerAdaptor<WatchpointSetType>>
class GenericDesiredWatchpoints {
#if !ASSERT_DISABLED
typedef HashMap<WatchpointSetType, bool> StateMap;
#endif
public:
GenericDesiredWatchpoints()
: m_reallyAdded(false)
{
}
void addLazily(const WatchpointSetType& set)
{
m_sets.add(set);
}
void reallyAdd(CodeBlock* codeBlock, CommonData& common)
{
RELEASE_ASSERT(!m_reallyAdded);
for (auto& set : m_sets)
Adaptor::add(codeBlock, set, common);
m_reallyAdded = true;
}
bool areStillValid() const
{
for (auto& set : m_sets) {
if (Adaptor::hasBeenInvalidated(set))
return false;
}
return true;
}
bool isWatched(const WatchpointSetType& set) const
{
return m_sets.contains(set);
}
void dumpInContext(PrintStream& out, DumpContext* context) const
{
CommaPrinter comma;
for (const WatchpointSetType& entry : m_sets) {
out.print(comma);
Adaptor::dumpInContext(out, entry, context);
}
}
private:
HashSet<WatchpointSetType> m_sets;
bool m_reallyAdded;
};
class DesiredWatchpoints {
public:
DesiredWatchpoints();
~DesiredWatchpoints();
void addLazily(WatchpointSet*);
void addLazily(InlineWatchpointSet&);
void addLazily(InferredValue*);
void addLazily(JSArrayBufferView*);
// It's recommended that you don't call this directly. Use Graph::watchCondition(), which does
// the required GC magic as well as some other bookkeeping.
void addLazily(const ObjectPropertyCondition&);
// It's recommended that you don't call this directly. Use Graph::inferredTypeFor(), which does
// the required GC magic.
void addLazily(const DesiredInferredType&);
bool consider(Structure*);
void reallyAdd(CodeBlock*, CommonData&);
bool areStillValid() const;
bool isWatched(WatchpointSet* set)
{
return m_sets.isWatched(set);
}
bool isWatched(InlineWatchpointSet& set)
{
return m_inlineSets.isWatched(&set);
}
bool isWatched(InferredValue* inferredValue)
{
return m_inferredValues.isWatched(inferredValue);
}
bool isWatched(JSArrayBufferView* view)
{
return m_bufferViews.isWatched(view);
}
bool isWatched(const ObjectPropertyCondition& key)
{
return m_adaptiveStructureSets.isWatched(key);
}
bool isWatched(const DesiredInferredType& key)
{
return m_inferredTypes.isWatched(key);
}
void dumpInContext(PrintStream&, DumpContext*) const;
void dump(PrintStream&) const;
private:
GenericDesiredWatchpoints<WatchpointSet*> m_sets;
GenericDesiredWatchpoints<InlineWatchpointSet*> m_inlineSets;
GenericDesiredWatchpoints<InferredValue*, InferredValueAdaptor> m_inferredValues;
GenericDesiredWatchpoints<JSArrayBufferView*, ArrayBufferViewWatchpointAdaptor> m_bufferViews;
GenericDesiredWatchpoints<ObjectPropertyCondition, AdaptiveStructureWatchpointAdaptor> m_adaptiveStructureSets;
GenericDesiredWatchpoints<DesiredInferredType, InferredTypeAdaptor> m_inferredTypes;
};
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
#endif // DFGDesiredWatchpoints_h
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