C++ Address::IsSectionOffset方法代码示例

static void
ResolveAddress (const ExecutionContext &exe_ctx,
                const Address &addr, 
                Address &resolved_addr)
{
    if (!addr.IsSectionOffset())
    {
        // If we weren't passed in a section offset address range,
        // try and resolve it to something
        Target *target = exe_ctx.GetTargetPtr();
        if (target)
        {
            if (target->GetSectionLoadList().IsEmpty())
            {
                target->GetImages().ResolveFileAddress (addr.GetOffset(), resolved_addr);
            }
            else
            {
                target->GetSectionLoadList().ResolveLoadAddress (addr.GetOffset(), resolved_addr);
            }
            // We weren't able to resolve the address, just treat it as a
            // raw address
            if (resolved_addr.IsValid())
                return;
        }
    }
    resolved_addr = addr;
}

bool
Variable::LocationIsValidForAddress (const Address &address)
{
    // Be sure to resolve the address to section offset prior to 
    // calling this function.
    if (address.IsSectionOffset())
    {
        SymbolContext sc;
        CalculateSymbolContext(&sc);
        if (sc.module_sp == address.GetModule())
        {
            // Is the variable is described by a single location?
            if (!m_location.IsLocationList())
            {
                // Yes it is, the location is valid. 
                return true;
            }
            
            if (sc.function)
            {
                addr_t loclist_base_file_addr = sc.function->GetAddressRange().GetBaseAddress().GetFileAddress();
                if (loclist_base_file_addr == LLDB_INVALID_ADDRESS)
                    return false;
                // It is a location list. We just need to tell if the location
                // list contains the current address when converted to a load
                // address
                return m_location.LocationListContainsAddress (loclist_base_file_addr, 
                                                               address.GetFileAddress());
            }
        }
    }
    return false;
}

const BreakpointLocationSP
BreakpointLocationList::FindByAddress(const Address &addr) const {
  std::lock_guard<std::recursive_mutex> guard(m_mutex);
  BreakpointLocationSP bp_loc_sp;
  if (!m_locations.empty()) {
    Address so_addr;

    if (addr.IsSectionOffset()) {
      so_addr = addr;
    } else {
      // Try and resolve as a load address if possible.
      m_owner.GetTarget().GetSectionLoadList().ResolveLoadAddress(
          addr.GetOffset(), so_addr);
      if (!so_addr.IsValid()) {
        // The address didn't resolve, so just set to passed in addr.
        so_addr = addr;
      }
    }

    addr_map::const_iterator pos = m_address_to_location.find(so_addr);
    if (pos != m_address_to_location.end())
      bp_loc_sp = pos->second;
  }

  return bp_loc_sp;
}

uint32_t
Module::ResolveSymbolContextForAddress (const Address& so_addr, uint32_t resolve_scope, SymbolContext& sc)
{
    Mutex::Locker locker (m_mutex);
    uint32_t resolved_flags = 0;

    // Clear the result symbol context in case we don't find anything
    sc.Clear();

    // Get the section from the section/offset address.
    const Section *section = so_addr.GetSection();

    // Make sure the section matches this module before we try and match anything
    if (section && section->GetModule() == this)
    {
        // If the section offset based address resolved itself, then this
        // is the right module.
        sc.module_sp = GetSP();
        resolved_flags |= eSymbolContextModule;

        // Resolve the compile unit, function, block, line table or line
        // entry if requested.
        if (resolve_scope & eSymbolContextCompUnit    ||
            resolve_scope & eSymbolContextFunction    ||
            resolve_scope & eSymbolContextBlock       ||
            resolve_scope & eSymbolContextLineEntry   )
        {
            SymbolVendor *symbols = GetSymbolVendor ();
            if (symbols)
                resolved_flags |= symbols->ResolveSymbolContext (so_addr, resolve_scope, sc);
        }

        // Resolve the symbol if requested, but don't re-look it up if we've already found it.
        if (resolve_scope & eSymbolContextSymbol && !(resolved_flags & eSymbolContextSymbol))
        {
            ObjectFile* ofile = GetObjectFile();
            if (ofile)
            {
                Symtab *symtab = ofile->GetSymtab();
                if (symtab)
                {
                    if (so_addr.IsSectionOffset())
                    {
                        sc.symbol = symtab->FindSymbolContainingFileAddress(so_addr.GetFileAddress());
                        if (sc.symbol)
                            resolved_flags |= eSymbolContextSymbol;
                    }
                }
            }
        }
    }
    return resolved_flags;
}

bool
Variable::DumpLocationForAddress (Stream *s, const Address &address)
{
    // Be sure to resolve the address to section offset prior to 
    // calling this function.
    if (address.IsSectionOffset())
    {
        SymbolContext sc;
        CalculateSymbolContext(&sc);
        if (sc.module_sp == address.GetModule())
        {
            ABI *abi = nullptr;
            if (m_owner_scope)
            {
                ModuleSP module_sp (m_owner_scope->CalculateSymbolContextModule());
                if (module_sp)
                    abi = ABI::FindPlugin (module_sp->GetArchitecture()).get();
            }

            const addr_t file_addr = address.GetFileAddress();
            if (sc.function)
            {
                if (sc.function->GetAddressRange().ContainsFileAddress(address))
                {
                    addr_t loclist_base_file_addr = sc.function->GetAddressRange().GetBaseAddress().GetFileAddress();
                    if (loclist_base_file_addr == LLDB_INVALID_ADDRESS)
                        return false;
                    return m_location.DumpLocationForAddress (s, 
                                                              eDescriptionLevelBrief, 
                                                              loclist_base_file_addr, 
                                                              file_addr,
                                                              abi);
                }
            }
            return m_location.DumpLocationForAddress (s, 
                                                      eDescriptionLevelBrief, 
                                                      LLDB_INVALID_ADDRESS, 
                                                      file_addr,
                                                      abi);
        }
    }
    return false;
}