1 //===-- GDBRemoteCommunicationHistory.cpp ---------------------------------===//
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-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "GDBRemoteCommunicationHistory.h"
10 
11 // Other libraries and framework includes
12 #include "lldb/Core/StreamFile.h"
13 #include "lldb/Utility/ConstString.h"
14 #include "lldb/Utility/Log.h"
15 
16 using namespace llvm;
17 using namespace lldb;
18 using namespace lldb_private;
19 using namespace lldb_private::process_gdb_remote;
20 
21 GDBRemoteCommunicationHistory::GDBRemoteCommunicationHistory(uint32_t size)
22     : m_packets() {
23   if (size)
24     m_packets.resize(size);
25 }
26 
27 GDBRemoteCommunicationHistory::~GDBRemoteCommunicationHistory() = default;
28 
29 void GDBRemoteCommunicationHistory::AddPacket(char packet_char,
30                                               GDBRemotePacket::Type type,
31                                               uint32_t bytes_transmitted) {
32   const size_t size = m_packets.size();
33   if (size == 0)
34     return;
35 
36   const uint32_t idx = GetNextIndex();
37   m_packets[idx].packet.data.assign(1, packet_char);
38   m_packets[idx].type = type;
39   m_packets[idx].bytes_transmitted = bytes_transmitted;
40   m_packets[idx].packet_idx = m_total_packet_count;
41   m_packets[idx].tid = llvm::get_threadid();
42 }
43 
44 void GDBRemoteCommunicationHistory::AddPacket(const std::string &src,
45                                               uint32_t src_len,
46                                               GDBRemotePacket::Type type,
47                                               uint32_t bytes_transmitted) {
48   const size_t size = m_packets.size();
49   if (size == 0)
50     return;
51 
52   const uint32_t idx = GetNextIndex();
53   m_packets[idx].packet.data.assign(src, 0, src_len);
54   m_packets[idx].type = type;
55   m_packets[idx].bytes_transmitted = bytes_transmitted;
56   m_packets[idx].packet_idx = m_total_packet_count;
57   m_packets[idx].tid = llvm::get_threadid();
58 }
59 
60 void GDBRemoteCommunicationHistory::Dump(Stream &strm) const {
61   const uint32_t size = GetNumPacketsInHistory();
62   const uint32_t first_idx = GetFirstSavedPacketIndex();
63   const uint32_t stop_idx = m_curr_idx + size;
64   for (uint32_t i = first_idx; i < stop_idx; ++i) {
65     const uint32_t idx = NormalizeIndex(i);
66     const GDBRemotePacket &entry = m_packets[idx];
67     if (entry.type == GDBRemotePacket::ePacketTypeInvalid ||
68         entry.packet.data.empty())
69       break;
70     strm.Printf("history[%u] ", entry.packet_idx);
71     entry.Dump(strm);
72   }
73 }
74 
75 void GDBRemoteCommunicationHistory::Dump(Log *log) const {
76   if (!log || m_dumped_to_log)
77     return;
78 
79   m_dumped_to_log = true;
80   const uint32_t size = GetNumPacketsInHistory();
81   const uint32_t first_idx = GetFirstSavedPacketIndex();
82   const uint32_t stop_idx = m_curr_idx + size;
83   for (uint32_t i = first_idx; i < stop_idx; ++i) {
84     const uint32_t idx = NormalizeIndex(i);
85     const GDBRemotePacket &entry = m_packets[idx];
86     if (entry.type == GDBRemotePacket::ePacketTypeInvalid ||
87         entry.packet.data.empty())
88       break;
89     LLDB_LOGF(log, "history[%u] tid=0x%4.4" PRIx64 " <%4u> %s packet: %s",
90               entry.packet_idx, entry.tid, entry.bytes_transmitted,
91               (entry.type == GDBRemotePacket::ePacketTypeSend) ? "send"
92                                                                : "read",
93               entry.packet.data.c_str());
94   }
95 }
96 
97