Add GDB remote packet reproducer.
llvm-svn: 346780
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationHistory.h b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationHistory.h
new file mode 100644
index 0000000..d0ca6a0
--- /dev/null
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationHistory.h
@@ -0,0 +1,156 @@
+//===-- GDBRemoteCommunicationHistory.h--------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_GDBRemoteCommunicationHistory_h_
+#define liblldb_GDBRemoteCommunicationHistory_h_
+
+#include <string>
+#include <vector>
+
+#include "lldb/lldb-public.h"
+#include "llvm/Support/YAMLTraits.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace lldb_private {
+namespace process_gdb_remote {
+
+/// The history keeps a circular buffer of GDB remote packets. The history is
+/// used for logging and replaying GDB remote packets.
+class GDBRemoteCommunicationHistory {
+public:
+ friend llvm::yaml::MappingTraits<GDBRemoteCommunicationHistory>;
+
+ enum PacketType { ePacketTypeInvalid = 0, ePacketTypeSend, ePacketTypeRecv };
+
+ /// Entry in the ring buffer containing the packet data, its type, size and
+ /// index. Entries can be serialized to file.
+ struct Entry {
+ Entry()
+ : packet(), type(ePacketTypeInvalid), bytes_transmitted(0),
+ packet_idx(0), tid(LLDB_INVALID_THREAD_ID) {}
+
+ void Clear() {
+ packet.data.clear();
+ type = ePacketTypeInvalid;
+ bytes_transmitted = 0;
+ packet_idx = 0;
+ tid = LLDB_INVALID_THREAD_ID;
+ }
+
+ struct BinaryData {
+ std::string data;
+ };
+
+ void Serialize(llvm::raw_ostream &strm) const;
+
+ BinaryData packet;
+ PacketType type;
+ uint32_t bytes_transmitted;
+ uint32_t packet_idx;
+ lldb::tid_t tid;
+ };
+
+ GDBRemoteCommunicationHistory(uint32_t size = 0);
+
+ ~GDBRemoteCommunicationHistory();
+
+ // For single char packets for ack, nack and /x03
+ void AddPacket(char packet_char, PacketType type, uint32_t bytes_transmitted);
+
+ void AddPacket(const std::string &src, uint32_t src_len, PacketType type,
+ uint32_t bytes_transmitted);
+
+ void Dump(Stream &strm) const;
+ void Dump(Log *log) const;
+ bool DidDumpToLog() const { return m_dumped_to_log; }
+
+ void SetStream(llvm::raw_ostream *strm) { m_stream = strm; }
+
+private:
+ uint32_t GetFirstSavedPacketIndex() const {
+ if (m_total_packet_count < m_packets.size())
+ return 0;
+ else
+ return m_curr_idx + 1;
+ }
+
+ uint32_t GetNumPacketsInHistory() const {
+ if (m_total_packet_count < m_packets.size())
+ return m_total_packet_count;
+ else
+ return (uint32_t)m_packets.size();
+ }
+
+ uint32_t GetNextIndex() {
+ ++m_total_packet_count;
+ const uint32_t idx = m_curr_idx;
+ m_curr_idx = NormalizeIndex(idx + 1);
+ return idx;
+ }
+
+ uint32_t NormalizeIndex(uint32_t i) const {
+ return m_packets.empty() ? 0 : i % m_packets.size();
+ }
+
+ std::vector<Entry> m_packets;
+ uint32_t m_curr_idx;
+ uint32_t m_total_packet_count;
+ mutable bool m_dumped_to_log;
+ llvm::raw_ostream *m_stream = nullptr;
+};
+
+} // namespace process_gdb_remote
+} // namespace lldb_private
+
+LLVM_YAML_IS_DOCUMENT_LIST_VECTOR(
+ lldb_private::process_gdb_remote::GDBRemoteCommunicationHistory::Entry)
+
+namespace llvm {
+namespace yaml {
+
+template <>
+struct ScalarEnumerationTraits<lldb_private::process_gdb_remote::
+ GDBRemoteCommunicationHistory::PacketType> {
+ static void enumeration(IO &io,
+ lldb_private::process_gdb_remote::
+ GDBRemoteCommunicationHistory::PacketType &value);
+};
+
+template <>
+struct ScalarTraits<lldb_private::process_gdb_remote::
+ GDBRemoteCommunicationHistory::Entry::BinaryData> {
+ static void output(const lldb_private::process_gdb_remote::
+ GDBRemoteCommunicationHistory::Entry::BinaryData &,
+ void *, raw_ostream &);
+
+ static StringRef
+ input(StringRef, void *,
+ lldb_private::process_gdb_remote::GDBRemoteCommunicationHistory::Entry::
+ BinaryData &);
+
+ static QuotingType mustQuote(StringRef S) { return QuotingType::None; }
+};
+
+template <>
+struct MappingTraits<
+ lldb_private::process_gdb_remote::GDBRemoteCommunicationHistory::Entry> {
+ static void
+ mapping(IO &io,
+ lldb_private::process_gdb_remote::GDBRemoteCommunicationHistory::Entry
+ &Entry);
+
+ static StringRef validate(
+ IO &io,
+ lldb_private::process_gdb_remote::GDBRemoteCommunicationHistory::Entry &);
+};
+
+} // namespace yaml
+} // namespace llvm
+
+#endif // liblldb_GDBRemoteCommunicationHistory_h_