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       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/MSF/StreamArray.h"
      19             : #include "llvm/DebugInfo/PDB/Raw/RawError.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         570 : 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/TypeRecords.def"
      42             : 
      43             : private:
      44             :   template <typename RecordKind>
      45             :   void visitKnownRecordImpl(codeview::CVType &CVR, RecordKind &Record) {
      46         184 :     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          26 : class TpiHashVerifier : public codeview::TypeVisitorCallbacks {
      59             : public:
      60             :   TpiHashVerifier(msf::FixedStreamArray<support::ulittle32_t> &HashValues,
      61             :                   uint32_t NumHashBuckets)
      62          26 :       : 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           0 :   Error errorInvalidHash() {
      80             :     return make_error<RawError>(
      81             :         raw_error_code::invalid_tpi_hash,
      82           0 :         "Type index is 0x" +
      83           0 :             utohexstr(codeview::TypeIndex::FirstNonSimpleIndex + Index));
      84             :   }
      85             : 
      86             :   msf::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