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
GDBRemoteCommunicationHistory(uint32_t size)21 GDBRemoteCommunicationHistory::GDBRemoteCommunicationHistory(uint32_t size)
22 : m_packets(), m_curr_idx(0), m_total_packet_count(0),
23 m_dumped_to_log(false) {
24 if (size)
25 m_packets.resize(size);
26 }
27
~GDBRemoteCommunicationHistory()28 GDBRemoteCommunicationHistory::~GDBRemoteCommunicationHistory() {}
29
AddPacket(char packet_char,GDBRemotePacket::Type type,uint32_t bytes_transmitted)30 void GDBRemoteCommunicationHistory::AddPacket(char packet_char,
31 GDBRemotePacket::Type type,
32 uint32_t bytes_transmitted) {
33 const size_t size = m_packets.size();
34 if (size == 0)
35 return;
36
37 const uint32_t idx = GetNextIndex();
38 m_packets[idx].packet.data.assign(1, packet_char);
39 m_packets[idx].type = type;
40 m_packets[idx].bytes_transmitted = bytes_transmitted;
41 m_packets[idx].packet_idx = m_total_packet_count;
42 m_packets[idx].tid = llvm::get_threadid();
43 if (m_recorder)
44 m_recorder->Record(m_packets[idx]);
45 }
46
AddPacket(const std::string & src,uint32_t src_len,GDBRemotePacket::Type type,uint32_t bytes_transmitted)47 void GDBRemoteCommunicationHistory::AddPacket(const std::string &src,
48 uint32_t src_len,
49 GDBRemotePacket::Type type,
50 uint32_t bytes_transmitted) {
51 const size_t size = m_packets.size();
52 if (size == 0)
53 return;
54
55 const uint32_t idx = GetNextIndex();
56 m_packets[idx].packet.data.assign(src, 0, src_len);
57 m_packets[idx].type = type;
58 m_packets[idx].bytes_transmitted = bytes_transmitted;
59 m_packets[idx].packet_idx = m_total_packet_count;
60 m_packets[idx].tid = llvm::get_threadid();
61 if (m_recorder)
62 m_recorder->Record(m_packets[idx]);
63 }
64
Dump(Stream & strm) const65 void GDBRemoteCommunicationHistory::Dump(Stream &strm) const {
66 const uint32_t size = GetNumPacketsInHistory();
67 const uint32_t first_idx = GetFirstSavedPacketIndex();
68 const uint32_t stop_idx = m_curr_idx + size;
69 for (uint32_t i = first_idx; i < stop_idx; ++i) {
70 const uint32_t idx = NormalizeIndex(i);
71 const GDBRemotePacket &entry = m_packets[idx];
72 if (entry.type == GDBRemotePacket::ePacketTypeInvalid ||
73 entry.packet.data.empty())
74 break;
75 strm.Printf("history[%u] ", entry.packet_idx);
76 entry.Dump(strm);
77 }
78 }
79
Dump(Log * log) const80 void GDBRemoteCommunicationHistory::Dump(Log *log) const {
81 if (!log || m_dumped_to_log)
82 return;
83
84 m_dumped_to_log = true;
85 const uint32_t size = GetNumPacketsInHistory();
86 const uint32_t first_idx = GetFirstSavedPacketIndex();
87 const uint32_t stop_idx = m_curr_idx + size;
88 for (uint32_t i = first_idx; i < stop_idx; ++i) {
89 const uint32_t idx = NormalizeIndex(i);
90 const GDBRemotePacket &entry = m_packets[idx];
91 if (entry.type == GDBRemotePacket::ePacketTypeInvalid ||
92 entry.packet.data.empty())
93 break;
94 LLDB_LOGF(log, "history[%u] tid=0x%4.4" PRIx64 " <%4u> %s packet: %s",
95 entry.packet_idx, entry.tid, entry.bytes_transmitted,
96 (entry.type == GDBRemotePacket::ePacketTypeSend) ? "send"
97 : "read",
98 entry.packet.data.c_str());
99 }
100 }
101
102