C++ Address::GetLoadAddress方法代码示例

lldb::addr_t
SBValue::GetLoadAddress()
{
    lldb::addr_t value = LLDB_INVALID_ADDRESS;
    if (m_opaque_sp)
    {
        Target* target = m_opaque_sp->GetUpdatePoint().GetTargetSP().get();
        if (target)
        {
            Mutex::Locker api_locker (target->GetAPIMutex());
            const bool scalar_is_load_address = true;
            AddressType addr_type;
            value = m_opaque_sp->GetAddressOf(scalar_is_load_address, &addr_type);
            if (addr_type == eAddressTypeFile)
            {
                Module* module = m_opaque_sp->GetModule();
                if (!module)
                    value = LLDB_INVALID_ADDRESS;
                else
                {
                    Address addr;
                    module->ResolveFileAddress(value, addr);
                    value = addr.GetLoadAddress(m_opaque_sp->GetUpdatePoint().GetTargetSP().get());
                }
            }
            else if (addr_type == eAddressTypeHost || addr_type == eAddressTypeInvalid)
                value = LLDB_INVALID_ADDRESS;
        }
    }
    LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    if (log)
        log->Printf ("SBValue(%p)::GetLoadAddress () => (%llu)", m_opaque_sp.get(), value);
    
    return value;
}

// Find the load address of a symbol
static lldb::addr_t findSymbolAddress( Process *proc, ConstString findName )
{
    assert( proc != nullptr );

    ModuleSP module = proc->GetTarget().GetExecutableModule();
    assert( module.get() != nullptr );

    ObjectFile *exe = module->GetObjectFile();
    assert( exe != nullptr );

    lldb_private::Symtab *symtab = exe->GetSymtab( );
    assert( symtab != nullptr );

    for ( size_t i = 0; i < symtab->GetNumSymbols( ); i++ )
    {
        const Symbol* sym = symtab->SymbolAtIndex( i );
        assert( sym != nullptr );
        const ConstString &symName = sym->GetName( );

        if ( ConstString::Compare( findName, symName ) == 0 )
        {
            Address addr = sym->GetAddress();
            return addr.GetLoadAddress( & proc->GetTarget() );
        }
    }
    return LLDB_INVALID_ADDRESS;
}

bool DYLDRendezvous::FindMetadata(const char *name, PThreadField field,
                                  uint32_t &value) {
  Target &target = m_process->GetTarget();

  SymbolContextList list;
  if (!target.GetImages().FindSymbolsWithNameAndType(ConstString(name),
                                                     eSymbolTypeAny, list))
    return false;

  Address address = list[0].symbol->GetAddress();
  addr_t addr = address.GetLoadAddress(&target);
  if (addr == LLDB_INVALID_ADDRESS)
    return false;

  Status error;
  value = (uint32_t)m_process->ReadUnsignedIntegerFromMemory(
      addr + field * sizeof(uint32_t), sizeof(uint32_t), 0, error);
  if (error.Fail())
    return false;

  if (field == eSize)
    value /= 8; // convert bits to bytes

  return true;
}

addr_t ProcessFreeBSD::GetImageInfoAddress() {
  Target *target = &GetTarget();
  ObjectFile *obj_file = target->GetExecutableModule()->GetObjectFile();
  Address addr = obj_file->GetImageInfoAddress(target);

  if (addr.IsValid())
    return addr.GetLoadAddress(target);
  return LLDB_INVALID_ADDRESS;
}

lldb::addr_t
ProcessElfCore::GetImageInfoAddress()
{
    ObjectFile *obj_file = GetTarget().GetExecutableModule()->GetObjectFile();
    Address addr = obj_file->GetImageInfoAddress(&GetTarget());

    if (addr.IsValid())
        return addr.GetLoadAddress(&GetTarget());
    return LLDB_INVALID_ADDRESS;
}

lldb::addr_t
ProcessWindows::GetImageInfoAddress()
{
    Target &target = GetTarget();
    ObjectFile *obj_file = target.GetExecutableModule()->GetObjectFile();
    Address addr = obj_file->GetImageInfoAddress(&target);
    if (addr.IsValid())
        return addr.GetLoadAddress(&target);
    else
        return LLDB_INVALID_ADDRESS;
}

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;
}

ThreadPlanRunToAddress::ThreadPlanRunToAddress
(
    Thread &thread,
    Address &address,
    bool stop_others
) :
    ThreadPlan (ThreadPlan::eKindRunToAddress, "Run to address plan", thread, eVoteNoOpinion, eVoteNoOpinion),
    m_stop_others (stop_others),
    m_addresses (),
    m_break_ids ()
{
    m_addresses.push_back (address.GetLoadAddress(&m_thread.GetProcess().GetTarget()));
    SetInitialBreakpoints();
}

BreakpointLocation::BreakpointLocation
(
    break_id_t loc_id,
    Breakpoint &owner,
    Address &addr,
    lldb::tid_t tid,
    bool hardware
) :
    StoppointLocation (loc_id, addr.GetLoadAddress(owner.GetTarget().GetProcessSP().get()), hardware),
    m_address (addr),
    m_owner (owner),
    m_options_ap (),
    m_bp_site_sp ()
{
    SetThreadID (tid);
}

bool AddressRange::ContainsLoadAddress(const Address &addr,
                                       Target *target) const {
  if (addr.GetSection() == m_base_addr.GetSection())
    return (addr.GetOffset() - m_base_addr.GetOffset()) < GetByteSize();
  addr_t load_base_addr = GetBaseAddress().GetLoadAddress(target);
  if (load_base_addr == LLDB_INVALID_ADDRESS)
    return false;

  addr_t load_addr = addr.GetLoadAddress(target);
  if (load_addr == LLDB_INVALID_ADDRESS)
    return false;

  if (load_base_addr <= load_addr)
    return (load_addr - load_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;
    }
  }

addr_t JITLoaderGDB::GetSymbolAddress(ModuleList &module_list,
                                      const ConstString &name,
                                      SymbolType symbol_type) const {
  SymbolContextList target_symbols;
  Target &target = m_process->GetTarget();

  if (!module_list.FindSymbolsWithNameAndType(name, symbol_type,
                                              target_symbols))
    return LLDB_INVALID_ADDRESS;

  SymbolContext sym_ctx;
  target_symbols.GetContextAtIndex(0, sym_ctx);

  const Address jit_descriptor_addr = sym_ctx.symbol->GetAddress();
  if (!jit_descriptor_addr.IsValid())
    return LLDB_INVALID_ADDRESS;

  const addr_t jit_addr = jit_descriptor_addr.GetLoadAddress(&target);
  return jit_addr;
}

lldb::addr_t
SBValue::GetLoadAddress()
{
    lldb::addr_t value = LLDB_INVALID_ADDRESS;
    ValueLocker locker;
    lldb::ValueObjectSP value_sp(GetSP(locker));
    if (value_sp)
    {
        TargetSP target_sp (value_sp->GetTargetSP());
        if (target_sp)
        {
            const bool scalar_is_load_address = true;
            AddressType addr_type;
            value = value_sp->GetAddressOf(scalar_is_load_address, &addr_type);
            if (addr_type == eAddressTypeFile)
            {
                ModuleSP module_sp (value_sp->GetModule());
                if (!module_sp)
                    value = LLDB_INVALID_ADDRESS;
                else
                {
                    Address addr;
                    module_sp->ResolveFileAddress(value, addr);
                    value = addr.GetLoadAddress(target_sp.get());
                }
            }
            else if (addr_type == eAddressTypeHost || addr_type == eAddressTypeInvalid)
                value = LLDB_INVALID_ADDRESS;
        }
    }
    Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    if (log)
        log->Printf ("SBValue(%p)::GetLoadAddress () => (%" PRIu64 ")", value_sp.get(), value);
    
    return value;
}

/// Locates the address of the rendezvous structure.  Returns the address on
/// success and LLDB_INVALID_ADDRESS on failure.
static addr_t
ResolveRendezvousAddress(Process *process)
{
    Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER));
    addr_t info_location;
    addr_t info_addr;
    Error error;

    if (!process)
    {
        if (log)
            log->Printf ("%s null process provided", __FUNCTION__);
        return LLDB_INVALID_ADDRESS;
    }

    // Try to get it from our process.  This might be a remote process and might
    // grab it via some remote-specific mechanism.
    info_location = process->GetImageInfoAddress();
    if (log)
        log->Printf ("%s info_location = 0x%" PRIx64, __FUNCTION__, info_location);

    // If the process fails to return an address, fall back to seeing if the local object file can help us find it.
    if (info_location == LLDB_INVALID_ADDRESS)
    {
        Target *target = &process->GetTarget();
        if (target)
        {
            ObjectFile *obj_file = target->GetExecutableModule()->GetObjectFile();
            Address addr = obj_file->GetImageInfoAddress(target);

            if (addr.IsValid())
            {
                info_location = addr.GetLoadAddress(target);
                if (log)
                    log->Printf ("%s resolved via direct object file approach to 0x%" PRIx64, __FUNCTION__, info_location);
            }
            else
            {
                if (log)
                    log->Printf ("%s FAILED - direct object file approach did not yield a valid address", __FUNCTION__);
            }
        }
    }

    if (info_location == LLDB_INVALID_ADDRESS)
    {
        if (log)
            log->Printf ("%s FAILED - invalid info address", __FUNCTION__);
        return LLDB_INVALID_ADDRESS;
    }

    if (log)
        log->Printf ("%s reading pointer (%" PRIu32 " bytes) from 0x%" PRIx64, __FUNCTION__, process->GetAddressByteSize(), info_location);

    info_addr = process->ReadPointerFromMemory(info_location, error);
    if (error.Fail())
    {
        if (log)
            log->Printf ("%s FAILED - could not read from the info location: %s", __FUNCTION__, error.AsCString ());
        return LLDB_INVALID_ADDRESS;
    }

    if (info_addr == 0)
    {
        if (log)
            log->Printf ("%s FAILED - the rendezvous address contained at 0x%" PRIx64 " returned a null value", __FUNCTION__, info_location);
        return LLDB_INVALID_ADDRESS;
    }

    return info_addr;
}

void
DynamicLoaderPOSIXDYLD::DidAttach()
{
    Log *log (GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER));
    if (log)
        log->Printf ("DynamicLoaderPOSIXDYLD::%s() pid %" PRIu64, __FUNCTION__, m_process ? m_process->GetID () : LLDB_INVALID_PROCESS_ID);

    m_auxv.reset(new AuxVector(m_process));
    if (log)
        log->Printf ("DynamicLoaderPOSIXDYLD::%s pid %" PRIu64 " reloaded auxv data", __FUNCTION__, m_process ? m_process->GetID () : LLDB_INVALID_PROCESS_ID);

    // ask the process if it can load any of its own modules
    m_process->LoadModules ();

    ModuleSP executable_sp = GetTargetExecutable ();
    ResolveExecutableModule (executable_sp);

    // find the main process load offset
    addr_t load_offset = ComputeLoadOffset ();
    if (log)
        log->Printf ("DynamicLoaderPOSIXDYLD::%s pid %" PRIu64 " executable '%s', load_offset 0x%" PRIx64, __FUNCTION__, m_process ? m_process->GetID () : LLDB_INVALID_PROCESS_ID, executable_sp ? executable_sp->GetFileSpec().GetPath().c_str () : "<null executable>", load_offset);

    // if we dont have a load address we cant re-base
    bool rebase_exec = (load_offset == LLDB_INVALID_ADDRESS) ? false : true;

    // if we have a valid executable
    if (executable_sp.get())
    {
        lldb_private::ObjectFile * obj = executable_sp->GetObjectFile();
        if (obj)
        {
            // don't rebase if the module already has a load address
            Target & target = m_process->GetTarget ();
            Address addr = obj->GetImageInfoAddress (&target);
            if (addr.GetLoadAddress (&target) != LLDB_INVALID_ADDRESS)
                rebase_exec = false;
        }
    }
    else
    {
        // no executable, nothing to re-base
        rebase_exec = false;
    }

    // if the target executable should be re-based
    if (rebase_exec)
    {
        ModuleList module_list;

        module_list.Append(executable_sp);
        if (log)
            log->Printf ("DynamicLoaderPOSIXDYLD::%s pid %" PRIu64 " added executable '%s' to module load list",
                         __FUNCTION__,
                         m_process ? m_process->GetID () : LLDB_INVALID_PROCESS_ID,
                         executable_sp->GetFileSpec().GetPath().c_str ());

        UpdateLoadedSections(executable_sp, LLDB_INVALID_ADDRESS, load_offset);

        // When attaching to a target, there are two possible states:
        // (1) We already crossed the entry point and therefore the rendezvous
        //     structure is ready to be used and we can load the list of modules
        //     and place the rendezvous breakpoint.
        // (2) We didn't cross the entry point yet, so these structures are not
        //     ready; we should behave as if we just launched the target and
        //     call ProbeEntry(). This will place a breakpoint on the entry
        //     point which itself will be hit after the rendezvous structure is
        //     set up and will perform actions described in (1).
        if (m_rendezvous.Resolve())
        {
            if (log)
                log->Printf ("DynamicLoaderPOSIXDYLD::%s() pid %" PRIu64 " rendezvous could resolve: attach assuming dynamic loader info is available now", __FUNCTION__, m_process ? m_process->GetID () : LLDB_INVALID_PROCESS_ID);
            LoadAllCurrentModules();
            SetRendezvousBreakpoint();
        }
        else
        {
            if (log)
                log->Printf ("DynamicLoaderPOSIXDYLD::%s() pid %" PRIu64 " rendezvous could not yet resolve: adding breakpoint to catch future rendezvous setup", __FUNCTION__, m_process ? m_process->GetID () : LLDB_INVALID_PROCESS_ID);
            ProbeEntry();
        }

        m_process->GetTarget().ModulesDidLoad(module_list);
        if (log)
        {
            log->Printf ("DynamicLoaderPOSIXDYLD::%s told the target about the modules that loaded:", __FUNCTION__);
            for (auto module_sp : module_list.Modules ())
            {
                log->Printf ("-- [module] %s (pid %" PRIu64 ")",
                             module_sp ? module_sp->GetFileSpec().GetPath().c_str () : "<null>",
                             m_process ? m_process->GetID () : LLDB_INVALID_PROCESS_ID);
            }
        }
    }
}