0b69756110
This implements the interactive trace start and stop methods. This diff ended up being much larger than I anticipated because, by doing it, I found that I had implemented in the beginning many things in a non optimal way. In any case, the code is much better now. There's a lot of boilerplate code due to the gdb-remote protocol, but the main changes are: - New tracing packets: jLLDBTraceStop, jLLDBTraceStart, jLLDBTraceGetBinaryData. The gdb-remote packet definitions are quite comprehensive. - Implementation of the "process trace start|stop" and "thread trace start|stop" commands. - Implementaiton of an API in Trace.h to interact with live traces. - Created an IntelPTDecoder for live threads, that use the debugger's stop id as checkpoint for its internal cache. - Added a functionality to stop the process in case "process tracing" is enabled and a new thread can't traced. - Added tests I have some ideas to unify the code paths for post mortem and live threads, but I'll do that in another diff. Differential Revision: https://reviews.llvm.org/D91679
92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
//===-- GDBRemoteCommunicationServer.h --------------------------*- 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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#ifndef LLDB_SOURCE_PLUGINS_PROCESS_GDB_REMOTE_GDBREMOTECOMMUNICATIONSERVER_H
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#define LLDB_SOURCE_PLUGINS_PROCESS_GDB_REMOTE_GDBREMOTECOMMUNICATIONSERVER_H
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#include <functional>
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#include <map>
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#include "GDBRemoteCommunication.h"
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#include "lldb/lldb-private-forward.h"
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#include "llvm/Support/Errc.h"
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#include "llvm/Support/Error.h"
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class StringExtractorGDBRemote;
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namespace lldb_private {
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namespace process_gdb_remote {
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class ProcessGDBRemote;
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class GDBRemoteCommunicationServer : public GDBRemoteCommunication {
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public:
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using PacketHandler =
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std::function<PacketResult(StringExtractorGDBRemote &packet,
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Status &error, bool &interrupt, bool &quit)>;
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GDBRemoteCommunicationServer(const char *comm_name,
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const char *listener_name);
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~GDBRemoteCommunicationServer() override;
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void
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RegisterPacketHandler(StringExtractorGDBRemote::ServerPacketType packet_type,
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PacketHandler handler);
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PacketResult GetPacketAndSendResponse(Timeout<std::micro> timeout,
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Status &error, bool &interrupt,
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bool &quit);
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// After connecting, do a little handshake with the client to make sure
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// we are at least communicating
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bool HandshakeWithClient();
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protected:
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std::map<StringExtractorGDBRemote::ServerPacketType, PacketHandler>
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m_packet_handlers;
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bool m_exit_now; // use in asynchronous handling to indicate process should
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// exit.
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bool m_send_error_strings = false; // If the client enables this then
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// we will send error strings as well.
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PacketResult Handle_QErrorStringEnable(StringExtractorGDBRemote &packet);
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PacketResult SendErrorResponse(const Status &error);
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PacketResult SendErrorResponse(llvm::Error error);
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PacketResult SendUnimplementedResponse(const char *packet);
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PacketResult SendErrorResponse(uint8_t error);
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PacketResult SendIllFormedResponse(const StringExtractorGDBRemote &packet,
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const char *error_message);
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PacketResult SendOKResponse();
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/// Serialize and send a JSON object response.
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PacketResult SendJSONResponse(const llvm::json::Value &value);
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/// Serialize and send a JSON object response, or respond with an error if the
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/// input object is an \a llvm::Error.
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PacketResult SendJSONResponse(llvm::Expected<llvm::json::Value> value);
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private:
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GDBRemoteCommunicationServer(const GDBRemoteCommunicationServer &) = delete;
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const GDBRemoteCommunicationServer &
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operator=(const GDBRemoteCommunicationServer &) = delete;
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};
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} // namespace process_gdb_remote
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} // namespace lldb_private
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#endif // LLDB_SOURCE_PLUGINS_PROCESS_GDB_REMOTE_GDBREMOTECOMMUNICATIONSERVER_H
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