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/*
* Copyright (C) 2013, 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
* 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 FTLStackMaps_h
#define FTLStackMaps_h
#if ENABLE(FTL_JIT)
#include "DataView.h"
#include "FTLDWARFRegister.h"
#include "GPRInfo.h"
#include "RegisterSet.h"
#include <wtf/HashMap.h>
namespace JSC {
class MacroAssembler;
namespace FTL {
struct StackMaps {
struct ParseContext {
unsigned version;
DataView* view;
unsigned offset;
};
struct Constant {
int64_t integer;
void parse(ParseContext&);
void dump(PrintStream& out) const;
};
struct StackSize {
uint64_t functionOffset;
uint64_t size;
void parse(ParseContext&);
void dump(PrintStream&) const;
};
struct Location {
enum Kind : int8_t {
Unprocessed,
Register,
Direct,
Indirect,
Constant,
ConstantIndex
};
DWARFRegister dwarfReg;
uint8_t size;
Kind kind;
int32_t offset;
void parse(ParseContext&);
void dump(PrintStream& out) const;
GPRReg directGPR() const;
void restoreInto(MacroAssembler&, StackMaps&, char* savedRegisters, GPRReg result) const;
};
// FIXME: Investigate how much memory this takes and possibly prune it from the
// format we keep around in FTL::JITCode. I suspect that it would be most awesome to
// have a CompactStackMaps struct that lossily stores only that subset of StackMaps
// and Record that we actually need for OSR exit.
// https://bugs.webkit.org/show_bug.cgi?id=130802
struct LiveOut {
DWARFRegister dwarfReg;
uint8_t size;
void parse(ParseContext&);
void dump(PrintStream& out) const;
};
struct Record {
uint32_t patchpointID;
uint32_t instructionOffset;
uint16_t flags;
Vector<Location> locations;
Vector<LiveOut> liveOuts;
bool parse(ParseContext&);
void dump(PrintStream&) const;
RegisterSet liveOutsSet() const;
RegisterSet locationSet() const;
RegisterSet usedRegisterSet() const;
};
unsigned version;
Vector<StackSize> stackSizes;
Vector<Constant> constants;
Vector<Record> records;
bool parse(DataView*); // Returns true on parse success, false on failure. Failure means that LLVM is signaling compile failure to us.
void dump(PrintStream&) const;
void dumpMultiline(PrintStream&, const char* prefix) const;
typedef HashMap<uint32_t, Vector<Record>, WTF::IntHash<uint32_t>, WTF::UnsignedWithZeroKeyHashTraits<uint32_t>> RecordMap;
RecordMap computeRecordMap() const;
unsigned stackSize() const;
};
} } // namespace JSC::FTL
namespace WTF {
void printInternal(PrintStream&, JSC::FTL::StackMaps::Location::Kind);
} // namespace WTF
#endif // ENABLE(FTL_JIT)
#endif // FTLStackMaps_h
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