Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/CodeGen/FaultMaps.h b/linux-x64/clang/include/llvm/CodeGen/FaultMaps.h
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+++ b/linux-x64/clang/include/llvm/CodeGen/FaultMaps.h
@@ -0,0 +1,218 @@
+//===- 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/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 *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