C++ StringExtractorGDBRemote::GetChar方法代码示例

GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerCommon::Handle_vFile_pWrite(
    StringExtractorGDBRemote &packet) {
#ifdef _WIN32
  return SendUnimplementedResponse("GDBRemoteCommunicationServerCommon::Handle_"
                                   "vFile_pWrite() unimplemented");
#else
  packet.SetFilePos(::strlen("vFile:pwrite:"));

  StreamGDBRemote response;
  response.PutChar('F');

  int fd = packet.GetU32(UINT32_MAX);
  if (packet.GetChar() == ',') {
    off_t offset = packet.GetU64(UINT32_MAX);
    if (packet.GetChar() == ',') {
      std::string buffer;
      if (packet.GetEscapedBinaryData(buffer)) {
        const ssize_t bytes_written =
            ::pwrite(fd, buffer.data(), buffer.size(), offset);
        const int save_errno = bytes_written == -1 ? errno : 0;
        response.Printf("%zi", bytes_written);
        if (save_errno)
          response.Printf(",%i", save_errno);
      } else {
        response.Printf("-1,%i", EINVAL);
      }
      return SendPacketNoLock(response.GetString());
    }
  }
  return SendErrorResponse(27);
#endif
}

GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_vFile_Open (StringExtractorGDBRemote &packet)
{
    packet.SetFilePos(::strlen("vFile:open:"));
    std::string path;
    packet.GetHexByteStringTerminatedBy(path,',');
    if (!path.empty())
    {
        if (packet.GetChar() == ',')
        {
            uint32_t flags = packet.GetHexMaxU32(false, 0);
            if (packet.GetChar() == ',')
            {
                mode_t mode = packet.GetHexMaxU32(false, 0600);
                Error error;
                int fd = ::open (path.c_str(), flags, mode);
                const int save_errno = fd == -1 ? errno : 0;
                StreamString response;
                response.PutChar('F');
                response.Printf("%i", fd);
                if (save_errno)
                    response.Printf(",%i", save_errno);
                return SendPacketNoLock(response.GetData(), response.GetSize());
            }
        }
    }
    return SendErrorResponse(18);
}

char
GDBRemoteCommunication::GetAck ()
{
    StringExtractorGDBRemote packet;
    if (WaitForPacketWithTimeoutMicroSecondsNoLock (packet, GetPacketTimeoutInMicroSeconds ()) == 1)
        return packet.GetChar();
    return 0;
}

GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerCommon::Handle_qModuleInfo(
    StringExtractorGDBRemote &packet) {
  packet.SetFilePos(::strlen("qModuleInfo:"));

  std::string module_path;
  packet.GetHexByteStringTerminatedBy(module_path, ';');
  if (module_path.empty())
    return SendErrorResponse(1);

  if (packet.GetChar() != ';')
    return SendErrorResponse(2);

  std::string triple;
  packet.GetHexByteString(triple);

  ModuleSpec matched_module_spec = GetModuleInfo(module_path, triple);
  if (!matched_module_spec.GetFileSpec())
    return SendErrorResponse(3);

  const auto file_offset = matched_module_spec.GetObjectOffset();
  const auto file_size = matched_module_spec.GetObjectSize();
  const auto uuid_str = matched_module_spec.GetUUID().GetAsString("");

  StreamGDBRemote response;

  if (uuid_str.empty()) {
    std::string md5_hash;
    if (!FileSystem::CalculateMD5AsString(matched_module_spec.GetFileSpec(),
                                          file_offset, file_size, md5_hash))
      return SendErrorResponse(5);
    response.PutCString("md5:");
    response.PutCStringAsRawHex8(md5_hash.c_str());
  } else {
    response.PutCString("uuid:");
    response.PutCStringAsRawHex8(uuid_str.c_str());
  }
  response.PutChar(';');

  const auto &module_arch = matched_module_spec.GetArchitecture();
  response.PutCString("triple:");
  response.PutCStringAsRawHex8(module_arch.GetTriple().getTriple().c_str());
  response.PutChar(';');

  response.PutCString("file_path:");
  response.PutCStringAsRawHex8(matched_module_spec.GetFileSpec().GetCString());
  response.PutChar(';');
  response.PutCString("file_offset:");
  response.PutHex64(file_offset);
  response.PutChar(';');
  response.PutCString("file_size:");
  response.PutHex64(file_size);
  response.PutChar(';');

  return SendPacketNoLock(response.GetString());
}

GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_vFile_pRead (StringExtractorGDBRemote &packet)
{
#ifdef _WIN32
    // Not implemented on Windows
    return SendUnimplementedResponse("GDBRemoteCommunicationServer::Handle_vFile_pRead() unimplemented");
#else
    StreamGDBRemote response;
    packet.SetFilePos(::strlen("vFile:pread:"));
    int fd = packet.GetS32(-1);
    if (packet.GetChar() == ',')
    {
        uint64_t count = packet.GetU64(UINT64_MAX);
        if (packet.GetChar() == ',')
        {
            uint64_t offset = packet.GetU64(UINT32_MAX);
            if (count == UINT64_MAX)
            {
                response.Printf("F-1:%i", EINVAL);
                return SendPacketNoLock(response.GetData(), response.GetSize());
            }
            
            std::string buffer(count, 0);
            const ssize_t bytes_read = ::pread (fd, &buffer[0], buffer.size(), offset);
            const int save_errno = bytes_read == -1 ? errno : 0;
            response.PutChar('F');
            response.Printf("%zi", bytes_read);
            if (save_errno)
                response.Printf(",%i", save_errno);
            else
            {
                response.PutChar(';');
                response.PutEscapedBytes(&buffer[0], bytes_read);
            }
            return SendPacketNoLock(response.GetData(), response.GetSize());
        }
    }
    return SendErrorResponse(21);

#endif
}

GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerCommon::Handle_vFile_symlink(
    StringExtractorGDBRemote &packet) {
  packet.SetFilePos(::strlen("vFile:symlink:"));
  std::string dst, src;
  packet.GetHexByteStringTerminatedBy(dst, ',');
  packet.GetChar(); // Skip ',' char
  packet.GetHexByteString(src);
  Error error = FileSystem::Symlink(FileSpec{src, true}, FileSpec{dst, false});
  StreamString response;
  response.Printf("F%u,%u", error.GetError(), error.GetError());
  return SendPacketNoLock(response.GetString());
}

GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerCommon::Handle_qPlatform_chmod (StringExtractorGDBRemote &packet)
{
    packet.SetFilePos(::strlen("qPlatform_chmod:"));

    mode_t mode = packet.GetHexMaxU32(false, UINT32_MAX);
    if (packet.GetChar() == ',')
    {
        std::string path;
        packet.GetHexByteString(path);
        Error error = FileSystem::SetFilePermissions(FileSpec{path, true}, mode);

        StreamGDBRemote response;
        response.Printf("F%u", error.GetError());

        return SendPacketNoLock(response.GetData(), response.GetSize());
    }
    return SendErrorResponse(19);
}

GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_A (StringExtractorGDBRemote &packet)
{
    // The 'A' packet is the most over designed packet ever here with
    // redundant argument indexes, redundant argument lengths and needed hex
    // encoded argument string values. Really all that is needed is a comma
    // separated hex encoded argument value list, but we will stay true to the
    // documented version of the 'A' packet here...

    packet.SetFilePos(1); // Skip the 'A'
    bool success = true;
    while (success && packet.GetBytesLeft() > 0)
    {
        // Decode the decimal argument string length. This length is the
        // number of hex nibbles in the argument string value.
        const uint32_t arg_len = packet.GetU32(UINT32_MAX);
        if (arg_len == UINT32_MAX)
            success = false;
        else
        {
            // Make sure the argument hex string length is followed by a comma
            if (packet.GetChar() != ',')
                success = false;
            else
            {
                // Decode the argument index. We ignore this really becuase
                // who would really send down the arguments in a random order???
                const uint32_t arg_idx = packet.GetU32(UINT32_MAX);
                if (arg_idx == UINT32_MAX)
                    success = false;
                else
                {
                    // Make sure the argument index is followed by a comma
                    if (packet.GetChar() != ',')
                        success = false;
                    else
                    {
                        // Decode the argument string value from hex bytes
                        // back into a UTF8 string and make sure the length
                        // matches the one supplied in the packet
                        std::string arg;
                        if (packet.GetHexByteString(arg) != (arg_len / 2))
                            success = false;
                        else
                        {
                            // If there are any bytes lft
                            if (packet.GetBytesLeft())
                            {
                                if (packet.GetChar() != ',')
                                    success = false;
                            }

                            if (success)
                            {
                                if (arg_idx == 0)
                                    m_process_launch_info.GetExecutableFile().SetFile(arg.c_str(), false);
                                m_process_launch_info.GetArguments().AppendArgument(arg.c_str());
                            }
                        }
                    }
                }
            }
        }
    }

    if (success)
    {
        m_process_launch_info.GetFlags().Set (eLaunchFlagDebug);
        m_process_launch_error = Host::LaunchProcess (m_process_launch_info);
        if (m_process_launch_info.GetProcessID() != LLDB_INVALID_PROCESS_ID)
        {
            return SendOKResponse ();
        }
    }
    return SendErrorResponse (8);
}

GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServer::Handle_qfProcessInfo (StringExtractorGDBRemote &packet)
{
    m_proc_infos_index = 0;
    m_proc_infos.Clear();

    ProcessInstanceInfoMatch match_info;
    packet.SetFilePos(::strlen ("qfProcessInfo"));
    if (packet.GetChar() == ':')
    {

        std::string key;
        std::string value;
        while (packet.GetNameColonValue(key, value))
        {
            bool success = true;
            if (key.compare("name") == 0)
            {
                StringExtractor extractor;
                extractor.GetStringRef().swap(value);
                extractor.GetHexByteString (value);
                match_info.GetProcessInfo().GetExecutableFile().SetFile(value.c_str(), false);
            }
            else if (key.compare("name_match") == 0)
            {
                if (value.compare("equals") == 0)
                {
                    match_info.SetNameMatchType (eNameMatchEquals);
                }
                else if (value.compare("starts_with") == 0)
                {
                    match_info.SetNameMatchType (eNameMatchStartsWith);
                }
                else if (value.compare("ends_with") == 0)
                {
                    match_info.SetNameMatchType (eNameMatchEndsWith);
                }
                else if (value.compare("contains") == 0)
                {
                    match_info.SetNameMatchType (eNameMatchContains);
                }
                else if (value.compare("regex") == 0)
                {
                    match_info.SetNameMatchType (eNameMatchRegularExpression);
                }
                else
                {
                    success = false;
                }
            }
            else if (key.compare("pid") == 0)
            {
                match_info.GetProcessInfo().SetProcessID (Args::StringToUInt32(value.c_str(), LLDB_INVALID_PROCESS_ID, 0, &success));
            }
            else if (key.compare("parent_pid") == 0)
            {
                match_info.GetProcessInfo().SetParentProcessID (Args::StringToUInt32(value.c_str(), LLDB_INVALID_PROCESS_ID, 0, &success));
            }
            else if (key.compare("uid") == 0)
            {
                match_info.GetProcessInfo().SetUserID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success));
            }
            else if (key.compare("gid") == 0)
            {
                match_info.GetProcessInfo().SetGroupID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success));
            }
            else if (key.compare("euid") == 0)
            {
                match_info.GetProcessInfo().SetEffectiveUserID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success));
            }
            else if (key.compare("egid") == 0)
            {
                match_info.GetProcessInfo().SetEffectiveGroupID (Args::StringToUInt32(value.c_str(), UINT32_MAX, 0, &success));
            }
            else if (key.compare("all_users") == 0)
            {
                match_info.SetMatchAllUsers(Args::StringToBoolean(value.c_str(), false, &success));
            }
            else if (key.compare("triple") == 0)
            {
                match_info.GetProcessInfo().GetArchitecture().SetTriple (value.c_str(), NULL);
            }
            else
            {
                success = false;
            }

            if (!success)
                return SendErrorResponse (2);
        }
    }

    if (Host::FindProcesses (match_info, m_proc_infos))
    {
        // We found something, return the first item by calling the get
        // subsequent process info packet handler...
        return Handle_qsProcessInfo (packet);
    }
    return SendErrorResponse (3);
}

StateType GDBRemoteClientBase::SendContinuePacketAndWaitForResponse(
    ContinueDelegate &delegate, const UnixSignals &signals,
    llvm::StringRef payload, StringExtractorGDBRemote &response) {
  Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS));
  response.Clear();

  {
    std::lock_guard<std::mutex> lock(m_mutex);
    m_continue_packet = payload;
    m_should_stop = false;
  }
  ContinueLock cont_lock(*this);
  if (!cont_lock)
    return eStateInvalid;
  OnRunPacketSent(true);

  for (;;) {
    PacketResult read_result = ReadPacket(response, kInterruptTimeout, false);
    switch (read_result) {
    case PacketResult::ErrorReplyTimeout: {
      std::lock_guard<std::mutex> lock(m_mutex);
      if (m_async_count == 0)
        continue;
      if (steady_clock::now() >= m_interrupt_time + kInterruptTimeout)
        return eStateInvalid;
    }
    case PacketResult::Success:
      break;
    default:
      if (log)
        log->Printf("GDBRemoteClientBase::%s () ReadPacket(...) => false",
                    __FUNCTION__);
      return eStateInvalid;
    }
    if (response.Empty())
      return eStateInvalid;

    const char stop_type = response.GetChar();
    if (log)
      log->Printf("GDBRemoteClientBase::%s () got packet: %s", __FUNCTION__,
                  response.GetStringRef().c_str());

    switch (stop_type) {
    case 'W':
    case 'X':
      return eStateExited;
    case 'E':
      // ERROR
      return eStateInvalid;
    default:
      if (log)
        log->Printf("GDBRemoteClientBase::%s () unrecognized async packet",
                    __FUNCTION__);
      return eStateInvalid;
    case 'O': {
      std::string inferior_stdout;
      response.GetHexByteString(inferior_stdout);
      delegate.HandleAsyncStdout(inferior_stdout);
      break;
    }
    case 'A':
      delegate.HandleAsyncMisc(
          llvm::StringRef(response.GetStringRef()).substr(1));
      break;
    case 'J':
      delegate.HandleAsyncStructuredDataPacket(response.GetStringRef());
      break;
    case 'T':
    case 'S':
      // Do this with the continue lock held.
      const bool should_stop = ShouldStop(signals, response);
      response.SetFilePos(0);

      // The packet we should resume with. In the future
      // we should check our thread list and "do the right thing"
      // for new threads that show up while we stop and run async
      // packets. Setting the packet to 'c' to continue all threads
      // is the right thing to do 99.99% of the time because if a
      // thread was single stepping, and we sent an interrupt, we
      // will notice above that we didn't stop due to an interrupt
      // but stopped due to stepping and we would _not_ continue.
      // This packet may get modified by the async actions (e.g. to send a
      // signal).
      m_continue_packet = 'c';
      cont_lock.unlock();

      delegate.HandleStopReply();
      if (should_stop)
        return eStateStopped;

      switch (cont_lock.lock()) {
      case ContinueLock::LockResult::Success:
        break;
      case ContinueLock::LockResult::Failed:
        return eStateInvalid;
      case ContinueLock::LockResult::Cancelled:
        return eStateStopped;
      }
      OnRunPacketSent(false);
      break;
//.........这里部分代码省略.........

GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerCommon::Handle_A(StringExtractorGDBRemote &packet) {
  // The 'A' packet is the most over designed packet ever here with
  // redundant argument indexes, redundant argument lengths and needed hex
  // encoded argument string values. Really all that is needed is a comma
  // separated hex encoded argument value list, but we will stay true to the
  // documented version of the 'A' packet here...

  Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
  int actual_arg_index = 0;

  packet.SetFilePos(1); // Skip the 'A'
  bool success = true;
  while (success && packet.GetBytesLeft() > 0) {
    // Decode the decimal argument string length. This length is the
    // number of hex nibbles in the argument string value.
    const uint32_t arg_len = packet.GetU32(UINT32_MAX);
    if (arg_len == UINT32_MAX)
      success = false;
    else {
      // Make sure the argument hex string length is followed by a comma
      if (packet.GetChar() != ',')
        success = false;
      else {
        // Decode the argument index. We ignore this really because
        // who would really send down the arguments in a random order???
        const uint32_t arg_idx = packet.GetU32(UINT32_MAX);
        if (arg_idx == UINT32_MAX)
          success = false;
        else {
          // Make sure the argument index is followed by a comma
          if (packet.GetChar() != ',')
            success = false;
          else {
            // Decode the argument string value from hex bytes
            // back into a UTF8 string and make sure the length
            // matches the one supplied in the packet
            std::string arg;
            if (packet.GetHexByteStringFixedLength(arg, arg_len) !=
                (arg_len / 2))
              success = false;
            else {
              // If there are any bytes left
              if (packet.GetBytesLeft()) {
                if (packet.GetChar() != ',')
                  success = false;
              }

              if (success) {
                if (arg_idx == 0)
                  m_process_launch_info.GetExecutableFile().SetFile(arg.c_str(),
                                                                    false);
                m_process_launch_info.GetArguments().AppendArgument(arg);
                if (log)
                  log->Printf("LLGSPacketHandler::%s added arg %d: \"%s\"",
                              __FUNCTION__, actual_arg_index, arg.c_str());
                ++actual_arg_index;
              }
            }
          }
        }
      }
    }
  }

  if (success) {
    m_process_launch_error = LaunchProcess();
    if (m_process_launch_info.GetProcessID() != LLDB_INVALID_PROCESS_ID) {
      return SendOKResponse();
    } else {
      Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS));
      if (log)
        log->Printf("LLGSPacketHandler::%s failed to launch exe: %s",
                    __FUNCTION__, m_process_launch_error.AsCString());
    }
  }
  return SendErrorResponse(8);
}

GDBRemoteCommunication::PacketResult
GDBRemoteCommunicationServerCommon::Handle_qfProcessInfo(
    StringExtractorGDBRemote &packet) {
  m_proc_infos_index = 0;
  m_proc_infos.Clear();

  ProcessInstanceInfoMatch match_info;
  packet.SetFilePos(::strlen("qfProcessInfo"));
  if (packet.GetChar() == ':') {
    llvm::StringRef key;
    llvm::StringRef value;
    while (packet.GetNameColonValue(key, value)) {
      bool success = true;
      if (key.equals("name")) {
        StringExtractor extractor(value);
        std::string file;
        extractor.GetHexByteString(file);
        match_info.GetProcessInfo().GetExecutableFile().SetFile(file.c_str(),
                                                                false);
      } else if (key.equals("name_match")) {
        NameMatchType name_match =
            llvm::StringSwitch<NameMatchType>(value)
                .Case("equals", eNameMatchEquals)
                .Case("starts_with", eNameMatchStartsWith)
                .Case("ends_with", eNameMatchEndsWith)
                .Case("contains", eNameMatchContains)
                .Case("regex", eNameMatchRegularExpression)
                .Default(eNameMatchIgnore);
        match_info.SetNameMatchType(name_match);
        if (name_match == eNameMatchIgnore)
          return SendErrorResponse(2);
      } else if (key.equals("pid")) {
        lldb::pid_t pid = LLDB_INVALID_PROCESS_ID;
        if (value.getAsInteger(0, pid))
          return SendErrorResponse(2);
        match_info.GetProcessInfo().SetProcessID(pid);
      } else if (key.equals("parent_pid")) {
        lldb::pid_t pid = LLDB_INVALID_PROCESS_ID;
        if (value.getAsInteger(0, pid))
          return SendErrorResponse(2);
        match_info.GetProcessInfo().SetParentProcessID(pid);
      } else if (key.equals("uid")) {
        uint32_t uid = UINT32_MAX;
        if (value.getAsInteger(0, uid))
          return SendErrorResponse(2);
        match_info.GetProcessInfo().SetUserID(uid);
      } else if (key.equals("gid")) {
        uint32_t gid = UINT32_MAX;
        if (value.getAsInteger(0, gid))
          return SendErrorResponse(2);
        match_info.GetProcessInfo().SetGroupID(gid);
      } else if (key.equals("euid")) {
        uint32_t uid = UINT32_MAX;
        if (value.getAsInteger(0, uid))
          return SendErrorResponse(2);
        match_info.GetProcessInfo().SetEffectiveUserID(uid);
      } else if (key.equals("egid")) {
        uint32_t gid = UINT32_MAX;
        if (value.getAsInteger(0, gid))
          return SendErrorResponse(2);
        match_info.GetProcessInfo().SetEffectiveGroupID(gid);
      } else if (key.equals("all_users")) {
        match_info.SetMatchAllUsers(
            Args::StringToBoolean(value, false, &success));
      } else if (key.equals("triple")) {
        match_info.GetProcessInfo().GetArchitecture().SetTriple(
            value.str().c_str(), NULL);
      } else {
        success = false;
      }

      if (!success)
        return SendErrorResponse(2);
    }
  }

  if (Host::FindProcesses(match_info, m_proc_infos)) {
    // We found something, return the first item by calling the get
    // subsequent process info packet handler...
    return Handle_qsProcessInfo(packet);
  }
  return SendErrorResponse(3);
}