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📄 AccelTable.h(13.54 KB)
📄 Analysis.h(6.04 KB)
📄 AntiDepBreaker.h(3.78 KB)
📄 AsmPrinter.h(27.35 KB)
📄 AsmPrinterHandler.h(2.6 KB)
📄 AtomicExpandUtils.h(2.49 KB)
📄 BasicTTIImpl.h(73.64 KB)
📄 BuiltinGCs.h(1008 B)
📄 CSEConfigBase.h(1.09 KB)
📄 CalcSpillWeights.h(4.69 KB)
📄 CallingConvLower.h(21 KB)
📄 CommandFlags.h(3.65 KB)
📄 CostTable.h(1.87 KB)
📄 DAGCombine.h(606 B)
📄 DFAPacketizer.h(7.47 KB)
📄 DIE.h(32.19 KB)
📄 DIEValue.def(1.4 KB)
📄 DbgEntityHistoryCalculator.h(4.37 KB)
📄 DebugHandlerBase.h(4.68 KB)
📄 DwarfStringPoolEntry.h(2.18 KB)
📄 EdgeBundles.h(2.13 KB)
📄 ExecutionDomainFix.h(7.72 KB)
📄 ExpandReductions.h(726 B)
📄 FastISel.h(22.87 KB)
📄 FaultMaps.h(6.66 KB)
📄 FunctionLoweringInfo.h(9.68 KB)
📄 GCMetadata.h(7.24 KB)
📄 GCMetadataPrinter.h(2.46 KB)
📄 GCStrategy.h(5.25 KB)
📁 GlobalISel
📄 ISDOpcodes.h(52.75 KB)
📄 IndirectThunks.h(3.85 KB)
📄 IntrinsicLowering.h(1.67 KB)
📄 LatencyPriorityQueue.h(3.09 KB)
📄 LazyMachineBlockFrequencyInfo.h(2.82 KB)
📄 LexicalScopes.h(10.06 KB)
📄 LinkAllAsmWriterComponents.h(1.34 KB)
📄 LinkAllCodegenComponents.h(2.18 KB)
📄 LiveInterval.h(37.24 KB)
📄 LiveIntervalCalc.h(2.91 KB)
📄 LiveIntervalUnion.h(6.93 KB)
📄 LiveIntervals.h(19.86 KB)
📄 LivePhysRegs.h(7.51 KB)
📄 LiveRangeCalc.h(11.49 KB)
📄 LiveRangeEdit.h(10.45 KB)
📄 LiveRegMatrix.h(6.18 KB)
📄 LiveRegUnits.h(6.24 KB)
📄 LiveStacks.h(3.35 KB)
📄 LiveVariables.h(12.98 KB)
📄 LoopTraversal.h(4.38 KB)
📄 LowLevelType.h(1.28 KB)
📄 MBFIWrapper.h(1.58 KB)
📄 MIRFormatter.h(3.13 KB)
📁 MIRParser
📄 MIRPrinter.h(1.73 KB)
📄 MIRYamlMapping.h(23.95 KB)
📄 MachORelocation.h(2.19 KB)
📄 MachineBasicBlock.h(42.95 KB)
📄 MachineBlockFrequencyInfo.h(3.21 KB)
📄 MachineBranchProbabilityInfo.h(2.69 KB)
📄 MachineCombinerPattern.h(3.5 KB)
📄 MachineConstantPool.h(5.25 KB)
📄 MachineDominanceFrontier.h(2.93 KB)
📄 MachineDominators.h(9.59 KB)
📄 MachineFrameInfo.h(34.84 KB)
📄 MachineFunction.h(42.94 KB)
📄 MachineFunctionPass.h(2.93 KB)
📄 MachineInstr.h(73.72 KB)
📄 MachineInstrBuilder.h(22.84 KB)
📄 MachineInstrBundle.h(10.16 KB)
📄 MachineInstrBundleIterator.h(10.92 KB)
📄 MachineJumpTableInfo.h(4.66 KB)
📄 MachineLoopInfo.h(7.3 KB)
📄 MachineLoopUtils.h(1.74 KB)
📄 MachineMemOperand.h(12.69 KB)
📄 MachineModuleInfo.h(9.88 KB)
📄 MachineModuleInfoImpls.h(3.36 KB)
📄 MachineOperand.h(37.64 KB)
📄 MachineOptimizationRemarkEmitter.h(8.99 KB)
📄 MachineOutliner.h(8.04 KB)
📄 MachinePassRegistry.h(6.1 KB)
📄 MachinePipeliner.h(21.17 KB)
📄 MachinePostDominators.h(2.93 KB)
📄 MachineRegionInfo.h(5.93 KB)
📄 MachineRegisterInfo.h(46.75 KB)
📄 MachineSSAUpdater.h(4.37 KB)
📄 MachineScheduler.h(36.6 KB)
📄 MachineSizeOpts.h(1.86 KB)
📄 MachineTraceMetrics.h(17.17 KB)
📄 MacroFusion.h(1.96 KB)
📄 ModuloSchedule.h(15.8 KB)
📄 NonRelocatableStringpool.h(2.9 KB)
📁 PBQP
📄 PBQPRAConstraint.h(1.83 KB)
📄 ParallelCG.h(1.66 KB)
📄 Passes.h(18.96 KB)
📄 PreISelIntrinsicLowering.h(944 B)
📄 PseudoSourceValue.h(6.21 KB)
📄 RDFGraph.h(33.73 KB)
📄 RDFLiveness.h(5.01 KB)
📄 RDFRegisters.h(6.51 KB)
📄 ReachingDefAnalysis.h(10.68 KB)
📄 RegAllocPBQP.h(16.47 KB)
📄 RegAllocRegistry.h(2.27 KB)
📄 Register.h(5.61 KB)
📄 RegisterClassInfo.h(4.86 KB)
📄 RegisterPressure.h(21.04 KB)
📄 RegisterScavenging.h(8.73 KB)
📄 RegisterUsageInfo.h(2.3 KB)
📄 ResourcePriorityQueue.h(4.19 KB)
📄 RuntimeLibcalls.h(3.05 KB)
📄 SDNodeProperties.td(1.57 KB)
📄 ScheduleDAG.h(28.92 KB)
📄 ScheduleDAGInstrs.h(15.49 KB)
📄 ScheduleDAGMutation.h(1021 B)
📄 ScheduleDFS.h(5.79 KB)
📄 ScheduleHazardRecognizer.h(4.65 KB)
📄 SchedulerRegistry.h(4.27 KB)
📄 ScoreboardHazardRecognizer.h(3.7 KB)
📄 SelectionDAG.h(89.12 KB)
📄 SelectionDAGAddressAnalysis.h(3.58 KB)
📄 SelectionDAGISel.h(13.48 KB)
📄 SelectionDAGNodes.h(91.77 KB)
📄 SelectionDAGTargetInfo.h(7.99 KB)
📄 SlotIndexes.h(24.12 KB)
📄 Spiller.h(1.16 KB)
📄 StackMaps.h(11.45 KB)
📄 StackProtector.h(4.1 KB)
📄 SwiftErrorValueTracking.h(3.87 KB)
📄 SwitchLoweringUtils.h(9.51 KB)
📄 TailDuplicator.h(5.54 KB)
📄 TargetCallingConv.h(8.26 KB)
📄 TargetFrameLowering.h(19.21 KB)
📄 TargetInstrInfo.h(84.48 KB)
📄 TargetLowering.h(194.17 KB)
📄 TargetLoweringObjectFileImpl.h(11.63 KB)
📄 TargetOpcodes.h(1.37 KB)
📄 TargetPassConfig.h(17.9 KB)
📄 TargetRegisterInfo.h(48.65 KB)
📄 TargetSchedule.h(7.75 KB)
📄 TargetSubtargetInfo.h(12.53 KB)
📄 UnreachableBlockElim.h(1.39 KB)
📄 ValueTypes.h(17.2 KB)
📄 ValueTypes.td(11.42 KB)
📄 VirtRegMap.h(6.37 KB)
📄 WasmEHFuncInfo.h(1.92 KB)
📄 WinEHFuncInfo.h(4.01 KB)

Editing: FaultMaps.h

//===- 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 <cassert>
#include <cstddef>
#include <cstdint>
#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);
};

/// A parser for the __llvm_faultmaps section generated by the FaultMaps class
/// above.  This parser is version locked with with the __llvm_faultmaps section
/// generated by the version of LLVM that includes it.  No guarantees are made
/// with respect to forward or backward compatibility.
class FaultMapParser {
  using FaultMapVersionType = uint8_t;
  using Reserved0Type = uint8_t;
  using Reserved1Type = uint16_t;
  using NumFunctionsType = uint32_t;

static const size_t FaultMapVersionOffset = 0;
  static const size_t Reserved0Offset =
      FaultMapVersionOffset + sizeof(FaultMapVersionType);
  static const size_t Reserved1Offset = Reserved0Offset + sizeof(Reserved0Type);
  static const size_t NumFunctionsOffset =
      Reserved1Offset + sizeof(Reserved1Type);
  static const size_t FunctionInfosOffset =
      NumFunctionsOffset + sizeof(NumFunctionsType);

const uint8_t *P;
  const uint8_t *E;

template <typename T> static T read(const uint8_t *P, const uint8_t *E) {
    assert(P + sizeof(T) <= E && "out of bounds read!");
    return support::endian::read<T, support::little, 1>(P);
  }

public:
  class FunctionFaultInfoAccessor {
    using FaultKindType = uint32_t;
    using FaultingPCOffsetType = uint32_t;
    using HandlerPCOffsetType = uint32_t;

static const size_t FaultKindOffset = 0;
    static const size_t FaultingPCOffsetOffset =
        FaultKindOffset + sizeof(FaultKindType);
    static const size_t HandlerPCOffsetOffset =
        FaultingPCOffsetOffset + sizeof(FaultingPCOffsetType);

const uint8_t *P;
    const uint8_t *E;

public:
    static const size_t Size =
        HandlerPCOffsetOffset + sizeof(HandlerPCOffsetType);

explicit FunctionFaultInfoAccessor(const uint8_t *P, const uint8_t *E)
        : P(P), E(E) {}

FaultKindType getFaultKind() const {
      return read<FaultKindType>(P + FaultKindOffset, E);
    }

FaultingPCOffsetType getFaultingPCOffset() const {
      return read<FaultingPCOffsetType>(P + FaultingPCOffsetOffset, E);
    }

HandlerPCOffsetType getHandlerPCOffset() const {
      return read<HandlerPCOffsetType>(P + HandlerPCOffsetOffset, E);
    }
  };

class FunctionInfoAccessor {
    using FunctionAddrType = uint64_t;
    using NumFaultingPCsType = uint32_t;
    using ReservedType = uint32_t;

static const size_t FunctionAddrOffset = 0;
    static const size_t NumFaultingPCsOffset =
        FunctionAddrOffset + sizeof(FunctionAddrType);
    static const size_t ReservedOffset =
        NumFaultingPCsOffset + sizeof(NumFaultingPCsType);
    static const size_t FunctionFaultInfosOffset =
        ReservedOffset + sizeof(ReservedType);
    static const size_t FunctionInfoHeaderSize = FunctionFaultInfosOffset;

const uint8_t *P = nullptr;
    const uint8_t *E = nullptr;

public:
    FunctionInfoAccessor() = default;

explicit FunctionInfoAccessor(const uint8_t *P, const uint8_t *E)
        : P(P), E(E) {}

FunctionAddrType getFunctionAddr() const {
      return read<FunctionAddrType>(P + FunctionAddrOffset, E);
    }

NumFaultingPCsType getNumFaultingPCs() const {
      return read<NumFaultingPCsType>(P + NumFaultingPCsOffset, E);
    }

FunctionFaultInfoAccessor getFunctionFaultInfoAt(uint32_t Index) const {
      assert(Index < getNumFaultingPCs() && "index out of bounds!");
      const uint8_t *Begin = P + FunctionFaultInfosOffset +
                             FunctionFaultInfoAccessor::Size * Index;
      return FunctionFaultInfoAccessor(Begin, E);
    }

FunctionInfoAccessor getNextFunctionInfo() const {
      size_t MySize = FunctionInfoHeaderSize +
                      getNumFaultingPCs() * FunctionFaultInfoAccessor::Size;

const uint8_t *Begin = P + MySize;
      assert(Begin < E && "out of bounds!");
      return FunctionInfoAccessor(Begin, E);
    }
  };

explicit FaultMapParser(const uint8_t *Begin, const uint8_t *End)
      : P(Begin), E(End) {}

FaultMapVersionType getFaultMapVersion() const {
    auto Version = read<FaultMapVersionType>(P + FaultMapVersionOffset, E);
    assert(Version == 1 && "only version 1 supported!");
    return Version;
  }

NumFunctionsType getNumFunctions() const {
    return read<NumFunctionsType>(P + NumFunctionsOffset, E);
  }

FunctionInfoAccessor getFirstFunctionInfo() const {
    const uint8_t *Begin = P + FunctionInfosOffset;
    return FunctionInfoAccessor(Begin, E);
  }
};

raw_ostream &
operator<<(raw_ostream &OS, const FaultMapParser::FunctionFaultInfoAccessor &);

raw_ostream &operator<<(raw_ostream &OS,
                        const FaultMapParser::FunctionInfoAccessor &);

raw_ostream &operator<<(raw_ostream &OS, const FaultMapParser &);

} // end namespace llvm

#endif // LLVM_CODEGEN_FAULTMAPS_H

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