contrib/llvm/include/llvm/DebugInfo/PDB/Native/TpiHashing.h

   1 //===- TpiHashing.h ---------------------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef LLVM_DEBUGINFO_PDB_TPIHASHING_H
  11 #define LLVM_DEBUGINFO_PDB_TPIHASHING_H
  12
  13 #include "llvm/ADT/Optional.h"
  14 #include "llvm/ADT/StringExtras.h"
  15 #include "llvm/DebugInfo/CodeView/TypeIndex.h"
  16 #include "llvm/DebugInfo/CodeView/TypeRecord.h"
  17 #include "llvm/DebugInfo/CodeView/TypeVisitorCallbacks.h"
  18 #include "llvm/DebugInfo/PDB/Native/RawError.h"
  19 #include "llvm/Support/BinaryStreamArray.h"
  20 #include "llvm/Support/Endian.h"
  21 #include "llvm/Support/Error.h"
  22 #include <cstdint>
  23 #include <string>
  24
  25 namespace llvm {
  26 namespace pdb {
  27
  28 class TpiHashUpdater : public codeview::TypeVisitorCallbacks {
  29 public:
  30   TpiHashUpdater() = default;
  31
  32 #define TYPE_RECORD(EnumName, EnumVal, Name)                                   \
  33   virtual Error visitKnownRecord(codeview::CVType &CVR,                        \
  34                                  codeview::Name##Record &Record) override {    \
  35     visitKnownRecordImpl(CVR, Record);                                         \
  36     return Error::success();                                                   \
  37   }
  38 #define TYPE_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
  39 #define MEMBER_RECORD(EnumName, EnumVal, Name)
  40 #define MEMBER_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
  41 #include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
  42
  43 private:
  44   template <typename RecordKind>
  45   void visitKnownRecordImpl(codeview::CVType &CVR, RecordKind &Record) {
  46     CVR.Hash = 0;
  47   }
  48
  49   void visitKnownRecordImpl(codeview::CVType &CVR,
  50                             codeview::UdtSourceLineRecord &Rec);
  51   void visitKnownRecordImpl(codeview::CVType &CVR,
  52                             codeview::UdtModSourceLineRecord &Rec);
  53   void visitKnownRecordImpl(codeview::CVType &CVR, codeview::ClassRecord &Rec);
  54   void visitKnownRecordImpl(codeview::CVType &CVR, codeview::EnumRecord &Rec);
  55   void visitKnownRecordImpl(codeview::CVType &CVR, codeview::UnionRecord &Rec);
  56 };
  57
  58 class TpiHashVerifier : public codeview::TypeVisitorCallbacks {
  59 public:
  60   TpiHashVerifier(FixedStreamArray<support::ulittle32_t> &HashValues,
  61                   uint32_t NumHashBuckets)
  62       : HashValues(HashValues), NumHashBuckets(NumHashBuckets) {}
  63
  64   Error visitKnownRecord(codeview::CVType &CVR,
  65                          codeview::UdtSourceLineRecord &Rec) override;
  66   Error visitKnownRecord(codeview::CVType &CVR,
  67                          codeview::UdtModSourceLineRecord &Rec) override;
  68   Error visitKnownRecord(codeview::CVType &CVR,
  69                          codeview::ClassRecord &Rec) override;
  70   Error visitKnownRecord(codeview::CVType &CVR,
  71                          codeview::EnumRecord &Rec) override;
  72   Error visitKnownRecord(codeview::CVType &CVR,
  73                          codeview::UnionRecord &Rec) override;
  74   Error visitTypeBegin(codeview::CVType &CVR) override;
  75
  76 private:
  77   Error verifySourceLine(codeview::TypeIndex TI);
  78
  79   Error errorInvalidHash() {
  80     return make_error<RawError>(
  81         raw_error_code::invalid_tpi_hash,
  82         "Type index is 0x" +
  83             utohexstr(codeview::TypeIndex::FirstNonSimpleIndex + Index));
  84   }
  85
  86   FixedStreamArray<support::ulittle32_t> HashValues;
  87   codeview::CVType RawRecord;
  88   uint32_t NumHashBuckets;
  89   uint32_t Index = -1;
  90 };
  91
  92 } // end namespace pdb
  93 } // end namespace llvm
  94
  95 #endif // LLVM_DEBUGINFO_PDB_TPIHASHING_H