C++ Address::SetOffset方法代码示例

bool
Section::ResolveContainedAddress (addr_t offset, Address &so_addr) const
{
    const uint32_t num_children = m_children.GetSize();
    if (num_children > 0)
    {
        for (uint32_t i=0; i<num_children; i++)
        {
            Section* child_section = m_children.GetSectionAtIndex (i).get();

            addr_t child_offset = child_section->GetOffset();
            if (child_offset <= offset && offset - child_offset < child_section->GetByteSize())
                return child_section->ResolveContainedAddress (offset - child_offset, so_addr);
        }
    }
    SectionSP linked_section_sp (m_linked_section_wp.lock());
    if (linked_section_sp)
    {
        so_addr.SetOffset(m_linked_offset + offset);
        so_addr.SetSection(linked_section_sp);
    }
    else
    {
        so_addr.SetOffset(offset);
        so_addr.SetSection(const_cast<Section *>(this)->shared_from_this());
        
#ifdef LLDB_CONFIGURATION_DEBUG
        // For debug builds, ensure that there are no orphaned (i.e., moduleless) sections.
        assert(GetModule().get());
#endif
    }
    return true;
}

bool
Section::ResolveContainedAddress (addr_t offset, Address &so_addr) const
{
    const uint32_t num_children = m_children.GetSize();
    if (num_children > 0)
    {
        for (uint32_t i=0; i<num_children; i++)
        {
            Section* child_section = m_children.GetSectionAtIndex (i).get();

            addr_t child_offset = child_section->GetOffset();
            if (child_offset <= offset && offset - child_offset < child_section->GetByteSize())
                return child_section->ResolveContainedAddress (offset - child_offset, so_addr);
        }
    }
    if (m_linked_section)
    {
        so_addr.SetOffset(m_linked_offset + offset);
        so_addr.SetSection(m_linked_section);
    }
    else
    {
        so_addr.SetOffset(offset);
        so_addr.SetSection(this);
    }
    return true;
}

//TODO: Need more work
bool Instruction::GetOperandReference(Database const& rDatabase, u8 Oprd, Address const& rAddrSrc, Address& rAddrDst) const
{
  medusa::Operand const* pOprd = Operand(Oprd);
  TOffset Offset = 0x0;

  rAddrDst = rAddrSrc;

  // XXX: Should never happen
  if (pOprd == NULL) return false;

  if (pOprd->GetType() & O_NO_REF)
    return false;

  if ((pOprd->GetType() & O_REL) || ((pOprd->GetType() & O_REG_PC_REL) && (pOprd->GetType() & O_MEM)))
  {
    switch (pOprd->GetType() & DS_MASK)
    {
      case DS_8BIT:   Offset = static_cast<s8> (pOprd->GetValue()) + GetLength(); break;
      case DS_16BIT:  Offset = static_cast<s16>(pOprd->GetValue()) + GetLength(); break;
      case DS_32BIT:  Offset = static_cast<s32>(pOprd->GetValue()) + GetLength(); break;
      case DS_64BIT:  Offset = static_cast<s64>(pOprd->GetValue()) + GetLength(); break;
      default:        Offset = pOprd->GetValue() + GetLength();
    }

    rAddrDst = rAddrSrc + Offset;
    return true;
  }

  else if ((pOprd->GetType() & O_ABS) || (pOprd->GetType() & O_IMM) || (pOprd->GetType() & O_DISP))
  {
    switch (pOprd->GetType() & DS_MASK)
    {
      case DS_8BIT:   rAddrDst.SetOffset(static_cast<s8> (pOprd->GetValue())); break;
      case DS_16BIT:  rAddrDst.SetOffset(static_cast<s16>(pOprd->GetValue())); break;
      case DS_32BIT:  rAddrDst.SetOffset(static_cast<s32>(pOprd->GetValue())); break;
      case DS_64BIT:  rAddrDst.SetOffset(static_cast<s64>(pOprd->GetValue())); break;
      default:        rAddrDst.SetOffset(pOprd->GetValue());
    }

    return true;
  }

  else if ((pOprd->GetType() & O_MEM))
  {
    if (pOprd->GetType() & O_REG_PC_REL)
      Offset += rAddrSrc.GetOffset();

    switch (pOprd->GetType() & DS_MASK)
    {
      case DS_8BIT:   Offset += static_cast<s8> (pOprd->GetValue()) + GetLength(); break;
      case DS_16BIT:  Offset += static_cast<s16>(pOprd->GetValue()) + GetLength(); break;
      case DS_32BIT:  Offset += static_cast<s32>(pOprd->GetValue()) + GetLength(); break;
      case DS_64BIT:  Offset += static_cast<s64>(pOprd->GetValue()) + GetLength(); break;
      default:        Offset += pOprd->GetValue() + GetLength();
    }

    rAddrDst.SetOffset(Offset);
    TOffset RawOffset;
    MemoryArea const* pMemArea = rDatabase.GetMemoryArea(rAddrDst);
    if (pMemArea == nullptr)                   return false;
    if (!pMemArea->Convert(Offset, RawOffset)) return false;

    BinaryStream const& rBinStrm = pMemArea->GetBinaryStream();

    u64 ReadOffset = 0x0;
    try
    {
      switch (pOprd->GetType() & MS_MASK)
      {
      case MS_8BIT:  rBinStrm.Read(RawOffset, ReadOffset); ReadOffset &= 0xff;       break;
      case MS_16BIT: rBinStrm.Read(RawOffset, ReadOffset); ReadOffset &= 0xffff;     break;
      case MS_32BIT: rBinStrm.Read(RawOffset, ReadOffset); ReadOffset &= 0xffffffff; break;
      case MS_64BIT: rBinStrm.Read(RawOffset, ReadOffset);                           break;
      default: return false;
      }
    }
    catch(Exception&) { return false; }

    rAddrDst.SetOffset(ReadOffset);
    return true;
  }

  return false;
}

Address VirtualMemoryArea::MakeAddress(TOffset Offset) const
{
  Address Addr = m_VirtualBase;
  Addr.SetOffset(Offset);
  return Addr;
}

//.........这里部分代码省略.........
        
        SymbolContext sc;
        Address address_point_address;
        if (target && !target->GetSectionLoadList().IsEmpty())
        {
            if (target->GetSectionLoadList().ResolveLoadAddress (vtable_address_point, address_point_address))
            {
                target->GetImages().ResolveSymbolContextForAddress (address_point_address, eSymbolContextSymbol, sc);
                Symbol *symbol = sc.symbol;
                if (symbol != NULL)
                {
                    const char *name = symbol->GetMangled().GetDemangledName().AsCString();
                    if (strstr(name, vtable_demangled_prefix) == name)
                    {
                         // We are a C++ class, that's good.  Get the class name and look it up:
                        const char *class_name = name + strlen(vtable_demangled_prefix);
                        class_type_or_name.SetName (class_name);
                        TypeList class_types;
                        uint32_t num_matches = target->GetImages().FindTypes (sc, 
                                                                              ConstString(class_name),
                                                                              true,
                                                                              UINT32_MAX,
                                                                              class_types);
                        if (num_matches == 1)
                        {
                            class_type_or_name.SetTypeSP(class_types.GetTypeAtIndex(0));
                        }
                        else if (num_matches > 1)
                        {
                            for (size_t i = 0; i < num_matches; i++)
                            {
                                lldb::TypeSP this_type(class_types.GetTypeAtIndex(i));
                                if (this_type)
                                {
                                    if (ClangASTContext::IsCXXClassType(this_type->GetClangFullType()))
                                    {
                                        // There can only be one type with a given name,
                                        // so we've just found duplicate definitions, and this
                                        // one will do as well as any other.
                                        // We don't consider something to have a dynamic type if
                                        // it is the same as the static type.  So compare against
                                        // the value we were handed:
                                        
                                        clang::ASTContext *in_ast_ctx = in_value.GetClangAST ();
                                        clang::ASTContext *this_ast_ctx = this_type->GetClangAST ();
                                        if (in_ast_ctx != this_ast_ctx
                                            || !ClangASTContext::AreTypesSame (in_ast_ctx, 
                                                                               in_value.GetClangType(),
                                                                               this_type->GetClangFullType()))
                                        {
                                            class_type_or_name.SetTypeSP (this_type);
                                            return true;
                                        }
                                        return false;
                                    }
                                }
                            }
                        }
                        else
                            return false;
                            
                        // The offset_to_top is two pointers above the address.
                        Address offset_to_top_address = address_point_address;
                        int64_t slide = -2 * ((int64_t) target->GetArchitecture().GetAddressByteSize());
                        offset_to_top_address.Slide (slide);
                        
                        Error error;
                        lldb::addr_t offset_to_top_location = offset_to_top_address.GetLoadAddress(target);
                        
                        size_t bytes_read = process->ReadMemory (offset_to_top_location, 
                                                                 memory_buffer, 
                                                                 address_byte_size, 
                                                                 error);
                                                                 
                        if (!error.Success() || (bytes_read != address_byte_size))
                        {
                            return false;
                        }
                        
                        offset_ptr = 0;
                        int64_t offset_to_top = data.GetMaxS64(&offset_ptr, process->GetAddressByteSize());
                        
                        // So the dynamic type is a value that starts at offset_to_top
                        // above the original address.
                        lldb::addr_t dynamic_addr = original_ptr + offset_to_top;
                        if (!target->GetSectionLoadList().ResolveLoadAddress (dynamic_addr, dynamic_address))
                        {
                            dynamic_address.SetOffset(dynamic_addr);
                            dynamic_address.SetSection(NULL);
                        }
                        return true;
                    }
                }
            }
        }
        
    }
    
    return false;
}