GDBRemoteCommunicationHistory.cpp revision 360784 
1//===-- GDBRemoteCommunicationHistory.cpp -----------------------*- 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-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
16using namespace llvm;
17using namespace lldb;
18using namespace lldb_private;
19using namespace lldb_private::process_gdb_remote;
20
21GDBRemoteCommunicationHistory::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
28GDBRemoteCommunicationHistory::~GDBRemoteCommunicationHistory() {}
29
30void 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
47void 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
65void 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
80void 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