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usr / src / contrib / llvm-project / llvm / lib / DebugInfo / PDB / Native /

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📄 DbiModuleDescriptor.cpp(2.5 KB)
📄 DbiModuleDescriptorBuilder.cpp(6.63 KB)
📄 DbiModuleList.cpp(8.3 KB)
📄 DbiStream.cpp(12.8 KB)
📄 DbiStreamBuilder.cpp(14.82 KB)
📄 EnumTables.cpp(1.33 KB)
📄 GSIStreamBuilder.cpp(17.23 KB)
📄 GlobalsStream.cpp(6.56 KB)
📄 Hash.cpp(2.39 KB)
📄 HashTable.cpp(2.55 KB)
📄 InfoStream.cpp(3.94 KB)
📄 InfoStreamBuilder.cpp(2.67 KB)
📄 InjectedSourceStream.cpp(2.31 KB)
📄 ModuleDebugStream.cpp(4.74 KB)
📄 NamedStreamMap.cpp(4.2 KB)
📄 NativeCompilandSymbol.cpp(2.22 KB)
📄 NativeEnumGlobals.cpp(1.87 KB)
📄 NativeEnumInjectedSources.cpp(4.05 KB)
📄 NativeEnumLineNumbers.cpp(1.44 KB)
📄 NativeEnumModules.cpp(1.36 KB)
📄 NativeEnumTypes.cpp(2.62 KB)
📄 NativeExeSymbol.cpp(3.25 KB)
📄 NativeFunctionSymbol.cpp(2.12 KB)
📄 NativeLineNumber.cpp(1.88 KB)
📄 NativePublicSymbol.cpp(1.92 KB)
📄 NativeRawSymbol.cpp(14.98 KB)
📄 NativeSession.cpp(12.36 KB)
📄 NativeSourceFile.cpp(1.47 KB)
📄 NativeSymbolEnumerator.cpp(4.24 KB)
📄 NativeTypeArray.cpp(2.6 KB)
📄 NativeTypeBuiltin.cpp(1.67 KB)
📄 NativeTypeEnum.cpp(12.55 KB)
📄 NativeTypeFunctionSig.cpp(7.3 KB)
📄 NativeTypePointer.cpp(6.41 KB)
📄 NativeTypeTypedef.cpp(1.05 KB)
📄 NativeTypeUDT.cpp(6.93 KB)
📄 NativeTypeVTShape.cpp(1.42 KB)
📄 PDBFile.cpp(16.2 KB)
📄 PDBFileBuilder.cpp(11 KB)
📄 PDBStringTable.cpp(4.53 KB)
📄 PDBStringTableBuilder.cpp(6.88 KB)
📄 PublicsStream.cpp(3.89 KB)
📄 RawError.cpp(2.13 KB)
📄 SymbolCache.cpp(22.39 KB)
📄 SymbolStream.cpp(1.4 KB)
📄 TpiHashing.cpp(4.32 KB)
📄 TpiStream.cpp(7.85 KB)
📄 TpiStreamBuilder.cpp(6.32 KB)

Editing: Hash.cpp

//===- Hash.cpp - PDB Hash Functions --------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

#include "llvm/DebugInfo/PDB/Native/Hash.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/Support/CRC.h"
#include "llvm/Support/Endian.h"
#include <cstdint>

using namespace llvm;
using namespace llvm::support;

// Corresponds to `Hasher::lhashPbCb` in PDB/include/misc.h.
// Used for name hash table and TPI/IPI hashes.
uint32_t pdb::hashStringV1(StringRef Str) {
  uint32_t Result = 0;
  uint32_t Size = Str.size();

ArrayRef<ulittle32_t> Longs(reinterpret_cast<const ulittle32_t *>(Str.data()),
                              Size / 4);

for (auto Value : Longs)
    Result ^= Value;

const uint8_t *Remainder = reinterpret_cast<const uint8_t *>(Longs.end());
  uint32_t RemainderSize = Size % 4;

// Maximum of 3 bytes left.  Hash a 2 byte word if possible, then hash the
  // possibly remaining 1 byte.
  if (RemainderSize >= 2) {
    uint16_t Value = *reinterpret_cast<const ulittle16_t *>(Remainder);
    Result ^= static_cast<uint32_t>(Value);
    Remainder += 2;
    RemainderSize -= 2;
  }

// hash possible odd byte
  if (RemainderSize == 1) {
    Result ^= *(Remainder++);
  }

const uint32_t toLowerMask = 0x20202020;
  Result |= toLowerMask;
  Result ^= (Result >> 11);

return Result ^ (Result >> 16);
}

// Corresponds to `HasherV2::HashULONG` in PDB/include/misc.h.
// Used for name hash table.
uint32_t pdb::hashStringV2(StringRef Str) {
  uint32_t Hash = 0xb170a1bf;

ArrayRef<char> Buffer(Str.begin(), Str.end());

ArrayRef<ulittle32_t> Items(
      reinterpret_cast<const ulittle32_t *>(Buffer.data()),
      Buffer.size() / sizeof(ulittle32_t));
  for (ulittle32_t Item : Items) {
    Hash += Item;
    Hash += (Hash << 10);
    Hash ^= (Hash >> 6);
  }
  Buffer = Buffer.slice(Items.size() * sizeof(ulittle32_t));
  for (uint8_t Item : Buffer) {
    Hash += Item;
    Hash += (Hash << 10);
    Hash ^= (Hash >> 6);
  }

return Hash * 1664525U + 1013904223U;
}

// Corresponds to `SigForPbCb` in langapi/shared/crc32.h.
uint32_t pdb::hashBufferV8(ArrayRef<uint8_t> Buf) {
  JamCRC JC(/*Init=*/0U);
  JC.update(Buf);
  return JC.getCRC();
}

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Editing: Hash.cpp

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