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//===- FaultMaps.h - The "FaultMaps" section --------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_FAULTMAPS_H
#define LLVM_CODEGEN_FAULTMAPS_H
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/Endian.h"
#include <map>
#include <vector>
namespace llvm {
class AsmPrinter;
class MCExpr;
class raw_ostream;
class FaultMaps {
public:
enum FaultKind {
FaultingLoad = 1,
FaultingLoadStore,
FaultingStore,
FaultKindMax
};
explicit FaultMaps(AsmPrinter &AP);
static const char *faultTypeToString(FaultKind);
void recordFaultingOp(FaultKind FaultTy, const MCSymbol *FaultingLabel,
const MCSymbol *HandlerLabel);
void serializeToFaultMapSection();
void reset() {
FunctionInfos.clear();
}
private:
static const char *WFMP;
struct FaultInfo {
FaultKind Kind = FaultKindMax;
const MCExpr *FaultingOffsetExpr = nullptr;
const MCExpr *HandlerOffsetExpr = nullptr;
FaultInfo() = default;
explicit FaultInfo(FaultMaps::FaultKind Kind, const MCExpr *FaultingOffset,
const MCExpr *HandlerOffset)
: Kind(Kind), FaultingOffsetExpr(FaultingOffset),
HandlerOffsetExpr(HandlerOffset) {}
};
using FunctionFaultInfos = std::vector<FaultInfo>;
// 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);
};
} // end namespace llvm
#endif // LLVM_CODEGEN_FAULTMAPS_H
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