C++ Address::GetFileAddress方法代码示例

int Address::CompareFileAddress(const Address &a, const Address &b) {
  addr_t a_file_addr = a.GetFileAddress();
  addr_t b_file_addr = b.GetFileAddress();
  if (a_file_addr < b_file_addr)
    return -1;
  if (a_file_addr > b_file_addr)
    return +1;
  return 0;
}

bool lldb_private::operator>(const Address &lhs, const Address &rhs) {
  ModuleSP lhs_module_sp(lhs.GetModule());
  ModuleSP rhs_module_sp(rhs.GetModule());
  Module *lhs_module = lhs_module_sp.get();
  Module *rhs_module = rhs_module_sp.get();
  if (lhs_module == rhs_module) {
    // Addresses are in the same module, just compare the file addresses
    return lhs.GetFileAddress() > rhs.GetFileAddress();
  } else {
    // The addresses are from different modules, just use the module
    // pointer value to get consistent ordering
    return lhs_module > rhs_module;
  }
}

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;
}

FuncUnwindersSP
UnwindTable::GetFuncUnwindersContainingAddress(const Address &addr,
                                               SymbolContext &sc) {
  Initialize();

  std::lock_guard<std::mutex> guard(m_mutex);

  // There is an UnwindTable per object file, so we can safely use file handles
  addr_t file_addr = addr.GetFileAddress();
  iterator end = m_unwinds.end();
  iterator insert_pos = end;
  if (!m_unwinds.empty()) {
    insert_pos = m_unwinds.lower_bound(file_addr);
    iterator pos = insert_pos;
    if ((pos == m_unwinds.end()) ||
        (pos != m_unwinds.begin() &&
         pos->second->GetFunctionStartAddress() != addr))
      --pos;

    if (pos->second->ContainsAddress(addr))
      return pos->second;
  }

  auto range_or = GetAddressRange(addr, sc);
  if (!range_or)
    return nullptr;

  FuncUnwindersSP func_unwinder_sp(new FuncUnwinders(*this, *range_or));
  m_unwinds.insert(insert_pos,
                   std::make_pair(range_or->GetBaseAddress().GetFileAddress(),
                                  func_unwinder_sp));
  return func_unwinder_sp;
}

int Address::CompareModulePointerAndOffset(const Address &a, const Address &b) {
  ModuleSP a_module_sp(a.GetModule());
  ModuleSP b_module_sp(b.GetModule());
  Module *a_module = a_module_sp.get();
  Module *b_module = b_module_sp.get();
  if (a_module < b_module)
    return -1;
  if (a_module > b_module)
    return +1;
  // Modules are the same, just compare the file address since they should
  // be unique
  addr_t a_file_addr = a.GetFileAddress();
  addr_t b_file_addr = b.GetFileAddress();
  if (a_file_addr < b_file_addr)
    return -1;
  if (a_file_addr > b_file_addr)
    return +1;
  return 0;
}

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 EmulateInstruction::SetInstruction(const Opcode &opcode,
                                        const Address &inst_addr,
                                        Target *target) {
  m_opcode = opcode;
  m_addr = LLDB_INVALID_ADDRESS;
  if (inst_addr.IsValid()) {
    if (target != nullptr)
      m_addr = inst_addr.GetLoadAddress(target);
    if (m_addr == LLDB_INVALID_ADDRESS)
      m_addr = inst_addr.GetFileAddress();
  }
  return true;
}

uint32_t
SymbolFileSymtab::ResolveSymbolContext (const Address& so_addr, uint32_t resolve_scope, SymbolContext& sc)
{
    if (m_obj_file->GetSymtab() == NULL)
        return 0;

    uint32_t resolved_flags = 0;
    if (resolve_scope & eSymbolContextSymbol)
    {
        sc.symbol = m_obj_file->GetSymtab()->FindSymbolContainingFileAddress(so_addr.GetFileAddress());
        if (sc.symbol)
            resolved_flags |= eSymbolContextSymbol;
    }
    return resolved_flags;
}

bool
DWARFCallFrameInfo::GetUnwindPlan (Address addr, UnwindPlan& unwind_plan)
{
    FDEEntryMap::Entry fde_entry;

    // Make sure that the Address we're searching for is the same object file
    // as this DWARFCallFrameInfo, we only store File offsets in m_fde_index.
    ModuleSP module_sp = addr.GetModule();
    if (module_sp.get() == nullptr || module_sp->GetObjectFile() == nullptr || module_sp->GetObjectFile() != &m_objfile)
        return false;

    if (GetFDEEntryByFileAddress (addr.GetFileAddress(), fde_entry) == false)
        return false;
    return FDEToUnwindPlan (fde_entry.data, addr, unwind_plan);
}

bool AddressRange::ContainsFileAddress(const Address &addr) const {
  if (addr.GetSection() == m_base_addr.GetSection())
    return (addr.GetOffset() - m_base_addr.GetOffset()) < GetByteSize();
  addr_t file_base_addr = GetBaseAddress().GetFileAddress();
  if (file_base_addr == LLDB_INVALID_ADDRESS)
    return false;

  addr_t file_addr = addr.GetFileAddress();
  if (file_addr == LLDB_INVALID_ADDRESS)
    return false;

  if (file_base_addr <= file_addr)
    return (file_addr - file_base_addr) < GetByteSize();

  return false;
}

  void Materialize(lldb::StackFrameSP &frame_sp, IRMemoryMap &map,
                   lldb::addr_t process_address, Status &err) override {
    Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));

    const lldb::addr_t load_addr = process_address + m_offset;

    if (log) {
      log->Printf("EntitySymbol::Materialize [address = 0x%" PRIx64
                  ", m_symbol = %s]",
                  (uint64_t)load_addr, m_symbol.GetName().AsCString());
    }

    const Address sym_address = m_symbol.GetAddress();

    ExecutionContextScope *exe_scope = map.GetBestExecutionContextScope();

    lldb::TargetSP target_sp;

    if (exe_scope)
      target_sp = map.GetBestExecutionContextScope()->CalculateTarget();

    if (!target_sp) {
      err.SetErrorStringWithFormat(
          "couldn't resolve symbol %s because there is no target",
          m_symbol.GetName().AsCString());
      return;
    }

    lldb::addr_t resolved_address = sym_address.GetLoadAddress(target_sp.get());

    if (resolved_address == LLDB_INVALID_ADDRESS)
      resolved_address = sym_address.GetFileAddress();

    Status pointer_write_error;

    map.WritePointerToMemory(load_addr, resolved_address, pointer_write_error);

    if (!pointer_write_error.Success()) {
      err.SetErrorStringWithFormat(
          "couldn't write the address of symbol %s: %s",
          m_symbol.GetName().AsCString(), pointer_write_error.AsCString());
      return;
    }
  }

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;
}

bool
DWARFCallFrameInfo::GetAddressRange (Address addr, AddressRange &range)
{

    // Make sure that the Address we're searching for is the same object file
    // as this DWARFCallFrameInfo, we only store File offsets in m_fde_index.
    ModuleSP module_sp = addr.GetModule();
    if (module_sp.get() == nullptr || module_sp->GetObjectFile() == nullptr || module_sp->GetObjectFile() != &m_objfile)
        return false;

    if (m_section_sp.get() == nullptr || m_section_sp->IsEncrypted())
        return false;
    GetFDEIndex();
    FDEEntryMap::Entry *fde_entry = m_fde_index.FindEntryThatContains (addr.GetFileAddress());
    if (!fde_entry)
        return false;

    range = AddressRange(fde_entry->base, fde_entry->size, m_objfile.GetSectionList());
    return true;
}

FuncUnwindersSP
UnwindTable::GetFuncUnwindersContainingAddress (const Address& addr, SymbolContext &sc)
{
    FuncUnwindersSP no_unwind_found;

    Initialize();

    // There is an UnwindTable per object file, so we can safely use file handles
    addr_t file_addr = addr.GetFileAddress();
    iterator end = m_unwinds.end ();
    iterator insert_pos = end;
    if (!m_unwinds.empty())
    {
        insert_pos = m_unwinds.lower_bound (file_addr);
        iterator pos = insert_pos;
        if ((pos == m_unwinds.end ()) || (pos != m_unwinds.begin() && pos->second->GetFunctionStartAddress() != addr))
            --pos;

        if (pos->second->ContainsAddress (addr))
            return pos->second;
    }

    AddressRange range;
    if (!sc.GetAddressRange(eSymbolContextFunction | eSymbolContextSymbol, 0, false, range) || !range.GetBaseAddress().IsValid())
    {
        // Does the eh_frame unwind info has a function bounds for this addr?
        if (m_eh_frame == NULL || !m_eh_frame->GetAddressRange (addr, range))
        {
            return no_unwind_found;
        }
    }

    FuncUnwindersSP func_unwinder_sp(new FuncUnwinders(*this, m_assembly_profiler, range));
    m_unwinds.insert (insert_pos, std::make_pair(range.GetBaseAddress().GetFileAddress(), func_unwinder_sp));
//    StreamFile s(stdout);
//    Dump (s);
    return func_unwinder_sp;
}

bool
SymbolContext::GetParentOfInlinedScope (const Address &curr_frame_pc, 
                                        SymbolContext &next_frame_sc, 
                                        Address &next_frame_pc) const
{
    next_frame_sc.Clear(false);
    next_frame_pc.Clear();

    if (block)
    {
        //const addr_t curr_frame_file_addr = curr_frame_pc.GetFileAddress();
        
        // In order to get the parent of an inlined function we first need to
        // see if we are in an inlined block as "this->block" could be an 
        // inlined block, or a parent of "block" could be. So lets check if
        // this block or one of this blocks parents is an inlined function.
        Block *curr_inlined_block = block->GetContainingInlinedBlock();
        if (curr_inlined_block)
        {
            // "this->block" is contained in an inline function block, so to
            // get the scope above the inlined block, we get the parent of the
            // inlined block itself
            Block *next_frame_block = curr_inlined_block->GetParent();
            // Now calculate the symbol context of the containing block
            next_frame_block->CalculateSymbolContext (&next_frame_sc);
            
            // If we get here we weren't able to find the return line entry using the nesting of the blocks and
            // the line table.  So just use the call site info from our inlined block.
            
            AddressRange range;
            if (curr_inlined_block->GetRangeContainingAddress (curr_frame_pc, range))
            {
                // To see there this new frame block it, we need to look at the
                // call site information from 
                const InlineFunctionInfo* curr_inlined_block_inlined_info = curr_inlined_block->GetInlinedFunctionInfo();
                next_frame_pc = range.GetBaseAddress();
                next_frame_sc.line_entry.range.GetBaseAddress() = next_frame_pc;
                next_frame_sc.line_entry.file = curr_inlined_block_inlined_info->GetCallSite().GetFile();
                next_frame_sc.line_entry.line = curr_inlined_block_inlined_info->GetCallSite().GetLine();
                next_frame_sc.line_entry.column = curr_inlined_block_inlined_info->GetCallSite().GetColumn();
                return true;
            }
            else
            {
                Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SYMBOLS));

                if (log)
                {
                    log->Printf ("warning: inlined block 0x%8.8" PRIx64 " doesn't have a range that contains file address 0x%" PRIx64,
                                 curr_inlined_block->GetID(), curr_frame_pc.GetFileAddress());
                }
#ifdef LLDB_CONFIGURATION_DEBUG
                else
                {
                    ObjectFile *objfile = NULL;
                    if (module_sp)
                    {
                        SymbolVendor *symbol_vendor = module_sp->GetSymbolVendor();
                        if (symbol_vendor)
                        {
                            SymbolFile *symbol_file = symbol_vendor->GetSymbolFile();
                            if (symbol_file)
                                objfile = symbol_file->GetObjectFile();
                        }
                    }
                    if (objfile)
                    {
                        Host::SystemLog (Host::eSystemLogWarning, 
                                         "warning: inlined block 0x%8.8" PRIx64 " doesn't have a range that contains file address 0x%" PRIx64 " in %s\n",
                                         curr_inlined_block->GetID(), 
                                         curr_frame_pc.GetFileAddress(),
                                         objfile->GetFileSpec().GetPath().c_str());
                    }
                    else
                    {
                        Host::SystemLog (Host::eSystemLogWarning, 
                                         "warning: inlined block 0x%8.8" PRIx64 " doesn't have a range that contains file address 0x%" PRIx64 "\n",
                                         curr_inlined_block->GetID(), 
                                         curr_frame_pc.GetFileAddress());
                    }
                }
#endif
            }
        }
    }
    
    return false;
}