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154 lines
5.2 KiB
154 lines
5.2 KiB
4 months ago
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//===-- GDBRemoteCommunicationServer.cpp ----------------------------------===//
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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 "ProcessGDBRemoteLog.h"
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#include "lldb/Utility/StreamString.h"
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#include "lldb/Utility/StringExtractorGDBRemote.h"
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#include "lldb/Utility/UnimplementedError.h"
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#include <cstring>
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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().data());
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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 = SendUnimplementedResponse(packet.GetStringRef().data());
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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.PutStringAsRawHex8(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::SendErrorResponse(llvm::Error error) {
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assert(error);
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std::unique_ptr<llvm::ErrorInfoBase> EIB;
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std::unique_ptr<UnimplementedError> UE;
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llvm::handleAllErrors(
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std::move(error),
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[&](std::unique_ptr<UnimplementedError> E) { UE = std::move(E); },
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[&](std::unique_ptr<llvm::ErrorInfoBase> E) { EIB = std::move(E); });
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if (EIB)
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return SendErrorResponse(Status(llvm::Error(std::move(EIB))));
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return SendUnimplementedResponse("");
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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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LLDB_LOGF(log, "GDBRemoteCommunicationServer::%s: ILLFORMED: '%s' (%s)",
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__FUNCTION__, failed_packet.GetStringRef().data(),
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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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