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1//===-- GDBRemoteCommunicationHistory.h--------------------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLDB_SOURCE_PLUGINS_PROCESS_GDB_REMOTE_GDBREMOTECOMMUNICATIONHISTORY_H10#define LLDB_SOURCE_PLUGINS_PROCESS_GDB_REMOTE_GDBREMOTECOMMUNICATIONHISTORY_H11 12#include <string>13#include <vector>14 15#include "lldb/Utility/GDBRemote.h"16#include "lldb/lldb-public.h"17#include "llvm/Support/raw_ostream.h"18 19namespace lldb_private {20namespace process_gdb_remote {21 22/// The history keeps a circular buffer of GDB remote packets. The history is23/// used for logging and replaying GDB remote packets.24class GDBRemoteCommunicationHistory {25public:26 GDBRemoteCommunicationHistory(uint32_t size = 0);27 28 ~GDBRemoteCommunicationHistory();29 30 // For single char packets for ack, nack and /x0331 void AddPacket(char packet_char, GDBRemotePacket::Type type,32 uint32_t bytes_transmitted);33 34 void AddPacket(const std::string &src, uint32_t src_len,35 GDBRemotePacket::Type type, uint32_t bytes_transmitted);36 37 void Dump(Stream &strm) const;38 void Dump(Log *log) const;39 bool DidDumpToLog() const { return m_dumped_to_log; }40 41private:42 uint32_t GetFirstSavedPacketIndex() const {43 if (m_total_packet_count < m_packets.size())44 return 0;45 else46 return m_curr_idx + 1;47 }48 49 uint32_t GetNumPacketsInHistory() const {50 if (m_total_packet_count < m_packets.size())51 return m_total_packet_count;52 else53 return (uint32_t)m_packets.size();54 }55 56 uint32_t GetNextIndex() {57 ++m_total_packet_count;58 const uint32_t idx = m_curr_idx;59 m_curr_idx = NormalizeIndex(idx + 1);60 return idx;61 }62 63 uint32_t NormalizeIndex(uint32_t i) const {64 return m_packets.empty() ? 0 : i % m_packets.size();65 }66 67 std::vector<GDBRemotePacket> m_packets;68 uint32_t m_curr_idx = 0;69 uint32_t m_total_packet_count = 0;70 mutable bool m_dumped_to_log = false;71};72 73} // namespace process_gdb_remote74} // namespace lldb_private75 76#endif // LLDB_SOURCE_PLUGINS_PROCESS_GDB_REMOTE_GDBREMOTECOMMUNICATIONHISTORY_H77