| 1 | //===- FaultMaps.h - The "FaultMaps" section --------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #ifndef LLVM_CODEGEN_FAULTMAPS_H |
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| 10 | #define LLVM_CODEGEN_FAULTMAPS_H |
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| 11 | |
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| 12 | #include "llvm/MC/MCSymbol.h" |
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| 13 | #include <map> |
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| 14 | #include <vector> |
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| 15 | |
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| 16 | namespace llvm { |
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| 17 | |
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| 18 | class AsmPrinter; |
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| 19 | class MCExpr; |
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| 20 | |
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| 21 | class FaultMaps { |
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| 22 | public: |
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| 23 | enum FaultKind { |
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| 24 | FaultingLoad = 1, |
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| 25 | FaultingLoadStore, |
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| 26 | FaultingStore, |
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| 27 | FaultKindMax |
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| 28 | }; |
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| 29 | |
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| 30 | explicit FaultMaps(AsmPrinter &AP); |
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| 31 | |
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| 32 | static const char *faultTypeToString(FaultKind); |
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| 33 | |
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| 34 | void recordFaultingOp(FaultKind FaultTy, const MCSymbol *FaultingLabel, |
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| 35 | const MCSymbol *HandlerLabel); |
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| 36 | void serializeToFaultMapSection(); |
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| 37 | void reset() { |
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| 38 | FunctionInfos.clear(); |
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| 39 | } |
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| 40 | |
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| 41 | private: |
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| 42 | static const char *WFMP; |
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| 43 | |
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| 44 | struct FaultInfo { |
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| 45 | FaultKind Kind = FaultKindMax; |
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| 46 | const MCExpr *FaultingOffsetExpr = nullptr; |
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| 47 | const MCExpr *HandlerOffsetExpr = nullptr; |
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| 48 | |
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| 49 | FaultInfo() = default; |
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| 50 | |
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| 51 | explicit FaultInfo(FaultMaps::FaultKind Kind, const MCExpr *FaultingOffset, |
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| 52 | const MCExpr *HandlerOffset) |
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| 53 | : Kind(Kind), FaultingOffsetExpr(FaultingOffset), |
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| 54 | HandlerOffsetExpr(HandlerOffset) {} |
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| 55 | }; |
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| 56 | |
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| 57 | using FunctionFaultInfos = std::vector<FaultInfo>; |
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| 58 | |
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| 59 | // We'd like to keep a stable iteration order for FunctionInfos to help |
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| 60 | // FileCheck based testing. |
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| 61 | struct MCSymbolComparator { |
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| 62 | bool operator()(const MCSymbol *LHS, const MCSymbol *RHS) const { |
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| 63 | return LHS->getName() < RHS->getName(); |
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| 64 | } |
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| 65 | }; |
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| 66 | |
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| 67 | std::map<const MCSymbol *, FunctionFaultInfos, MCSymbolComparator> |
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| 68 | FunctionInfos; |
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| 69 | AsmPrinter &AP; |
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| 70 | |
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| 71 | void emitFunctionInfo(const MCSymbol *FnLabel, const FunctionFaultInfos &FFI); |
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| 72 | }; |
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| 73 | |
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| 74 | } // end namespace llvm |
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| 75 | |
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| 76 | #endif // LLVM_CODEGEN_FAULTMAPS_H |
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| 77 | |
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