lldb/source/Plugins/Language/ObjC/CFBasicHash.h

   1 //===-- CFBasicHash.h -------------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LLDB_SOURCE_PLUGINS_LANGUAGE_OBJC_CFBASICHASH_H
  10 #define LLDB_SOURCE_PLUGINS_LANGUAGE_OBJC_CFBASICHASH_H
  11
  12 #include "lldb/Target/Process.h"
  13 #include "lldb/Target/Target.h"
  14
  15 namespace lldb_private {
  16
  17 class CFBasicHash {
  18 public:
  19   enum class HashType { set = 0, dict };
  20
  21   CFBasicHash() = default;
  22   ~CFBasicHash() = default;
  23
  24   bool Update(lldb::addr_t addr, ExecutionContextRef exe_ctx_rf);
  25
  26   bool IsValid() const;
  27
  28   bool IsMutable() const { return m_mutable; };
  29   bool IsMultiVariant() const { return m_multi; }
  30   HashType GetType() const { return m_type; }
  31
  32   size_t GetCount() const;
  33   lldb::addr_t GetKeyPointer() const;
  34   lldb::addr_t GetValuePointer() const;
  35
  36 private:
  37   template <typename T> struct __CFBasicHash {
  38     struct RuntimeBase {
  39       T cfisa;
  40       T cfinfoa;
  41     } base;
  42
  43     struct Bits {
  44       uint16_t __reserved0;
  45       uint16_t __reserved1 : 2;
  46       uint16_t keys_offset : 1;
  47       uint16_t counts_offset : 2;
  48       uint16_t counts_width : 2;
  49       uint16_t __reserved2 : 9;
  50       uint32_t used_buckets;        // number of used buckets
  51       uint64_t deleted : 16;        // number of elements deleted
  52       uint64_t num_buckets_idx : 8; // index to number of buckets
  53       uint64_t __reserved3 : 40;
  54       uint64_t __reserved4;
  55     } bits;
  56
  57     T pointers[3];
  58   };
  59   template <typename T> bool UpdateFor(std::unique_ptr<__CFBasicHash<T>> &m_ht);
  60
  61   size_t GetPointerCount() const;
  62
  63   uint32_t m_ptr_size = UINT32_MAX;
  64   lldb::ByteOrder m_byte_order = lldb::eByteOrderInvalid;
  65   Address m_address = LLDB_INVALID_ADDRESS;
  66   std::unique_ptr<__CFBasicHash<uint32_t>> m_ht_32 = nullptr;
  67   std::unique_ptr<__CFBasicHash<uint64_t>> m_ht_64 = nullptr;
  68   ExecutionContextRef m_exe_ctx_ref;
  69   bool m_mutable = true;
  70   bool m_multi = false;
  71   HashType m_type = HashType::set;
  72 };
  73
  74 } // namespace lldb_private
  75
  76 #endif // LLDB_SOURCE_PLUGINS_LANGUAGE_OBJC_CFBASICHASH_H