2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
141 lines
4.6 KiB
C++
141 lines
4.6 KiB
C++
//===-- GDBRemoteCommunicationServer.cpp ------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include <errno.h>
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#include "lldb/Host/Config.h"
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#include "GDBRemoteCommunicationServer.h"
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#include <cstring>
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#include "ProcessGDBRemoteLog.h"
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#include "lldb/Utility/StreamString.h"
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#include "lldb/Utility/StringExtractorGDBRemote.h"
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::process_gdb_remote;
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GDBRemoteCommunicationServer::GDBRemoteCommunicationServer(
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const char *comm_name, const char *listener_name)
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: GDBRemoteCommunication(comm_name, listener_name), m_exit_now(false) {
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RegisterPacketHandler(
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StringExtractorGDBRemote::eServerPacketType_QEnableErrorStrings,
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[this](StringExtractorGDBRemote packet, Status &error, bool &interrupt,
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bool &quit) { return this->Handle_QErrorStringEnable(packet); });
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}
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GDBRemoteCommunicationServer::~GDBRemoteCommunicationServer() {}
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void GDBRemoteCommunicationServer::RegisterPacketHandler(
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StringExtractorGDBRemote::ServerPacketType packet_type,
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PacketHandler handler) {
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m_packet_handlers[packet_type] = std::move(handler);
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}
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GDBRemoteCommunication::PacketResult
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GDBRemoteCommunicationServer::GetPacketAndSendResponse(
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Timeout<std::micro> timeout, Status &error, bool &interrupt, bool &quit) {
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StringExtractorGDBRemote packet;
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PacketResult packet_result = WaitForPacketNoLock(packet, timeout, false);
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if (packet_result == PacketResult::Success) {
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const StringExtractorGDBRemote::ServerPacketType packet_type =
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packet.GetServerPacketType();
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switch (packet_type) {
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case StringExtractorGDBRemote::eServerPacketType_nack:
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case StringExtractorGDBRemote::eServerPacketType_ack:
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break;
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case StringExtractorGDBRemote::eServerPacketType_invalid:
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error.SetErrorString("invalid packet");
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quit = true;
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break;
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case StringExtractorGDBRemote::eServerPacketType_unimplemented:
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packet_result = SendUnimplementedResponse(packet.GetStringRef().c_str());
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break;
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default:
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auto handler_it = m_packet_handlers.find(packet_type);
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if (handler_it == m_packet_handlers.end())
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packet_result =
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SendUnimplementedResponse(packet.GetStringRef().c_str());
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else
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packet_result = handler_it->second(packet, error, interrupt, quit);
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break;
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}
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} else {
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if (!IsConnected()) {
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error.SetErrorString("lost connection");
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quit = true;
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} else {
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error.SetErrorString("timeout");
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}
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}
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// Check if anything occurred that would force us to want to exit.
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if (m_exit_now)
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quit = true;
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return packet_result;
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}
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GDBRemoteCommunication::PacketResult
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GDBRemoteCommunicationServer::SendUnimplementedResponse(const char *) {
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// TODO: Log the packet we aren't handling...
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return SendPacketNoLock("");
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}
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GDBRemoteCommunication::PacketResult
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GDBRemoteCommunicationServer::SendErrorResponse(uint8_t err) {
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char packet[16];
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int packet_len = ::snprintf(packet, sizeof(packet), "E%2.2x", err);
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assert(packet_len < (int)sizeof(packet));
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return SendPacketNoLock(llvm::StringRef(packet, packet_len));
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}
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GDBRemoteCommunication::PacketResult
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GDBRemoteCommunicationServer::SendErrorResponse(const Status &error) {
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if (m_send_error_strings) {
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lldb_private::StreamString packet;
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packet.Printf("E%2.2x;", static_cast<uint8_t>(error.GetError()));
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packet.PutCStringAsRawHex8(error.AsCString());
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return SendPacketNoLock(packet.GetString());
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} else
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return SendErrorResponse(error.GetError());
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}
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GDBRemoteCommunication::PacketResult
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GDBRemoteCommunicationServer::Handle_QErrorStringEnable(
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StringExtractorGDBRemote &packet) {
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m_send_error_strings = true;
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return SendOKResponse();
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}
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GDBRemoteCommunication::PacketResult
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GDBRemoteCommunicationServer::SendIllFormedResponse(
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const StringExtractorGDBRemote &failed_packet, const char *message) {
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Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PACKETS));
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if (log)
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log->Printf("GDBRemoteCommunicationServer::%s: ILLFORMED: '%s' (%s)",
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__FUNCTION__, failed_packet.GetStringRef().c_str(),
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message ? message : "");
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return SendErrorResponse(0x03);
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}
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GDBRemoteCommunication::PacketResult
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GDBRemoteCommunicationServer::SendOKResponse() {
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return SendPacketNoLock("OK");
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}
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bool GDBRemoteCommunicationServer::HandshakeWithClient() {
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return GetAck() == PacketResult::Success;
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}
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