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//===------------------- FaultMaps.h - The "FaultMaps" section --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_FAULTMAPS_H
#define LLVM_CODEGEN_FAULTMAPS_H
#include "llvm/ADT/DenseMap.h"
#include "llvm/MC/MCSymbol.h"
#include <vector>
#include <map>
namespace llvm {
class AsmPrinter;
class MCExpr;
class MCSymbol;
class MCStreamer;
class FaultMaps {
public:
enum FaultKind { FaultingLoad = 1, FaultKindMax };
static const char *faultTypeToString(FaultKind);
explicit FaultMaps(AsmPrinter &AP);
void recordFaultingOp(FaultKind FaultTy, const MCSymbol *HandlerLabel);
void serializeToFaultMapSection();
private:
static const char *WFMP;
struct FaultInfo {
FaultKind Kind;
const MCExpr *FaultingOffsetExpr;
const MCExpr *HandlerOffsetExpr;
FaultInfo()
: Kind(FaultKindMax), FaultingOffsetExpr(nullptr),
HandlerOffsetExpr(nullptr) {}
explicit FaultInfo(FaultMaps::FaultKind Kind, const MCExpr *FaultingOffset,
const MCExpr *HandlerOffset)
: Kind(Kind), FaultingOffsetExpr(FaultingOffset),
HandlerOffsetExpr(HandlerOffset) {}
};
typedef std::vector<FaultInfo> FunctionFaultInfos;
// We'd like to keep a stable iteration order for FunctionInfos to help
// FileCheck based testing.
struct MCSymbolComparator {
bool operator()(const MCSymbol *LHS, const MCSymbol *RHS) const {
return LHS->getName() < RHS->getName();
}
};
std::map<const MCSymbol *, FunctionFaultInfos, MCSymbolComparator>
FunctionInfos;
AsmPrinter &AP;
void emitFunctionInfo(const MCSymbol *FnLabel, const FunctionFaultInfos &FFI);
};
}
#endif
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