clang-r458507/include/lldb/Utility/TraceGDBRemotePackets.h

//===-- TraceGDBRemotePackets.h ---------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLDB_UTILITY_TRACEGDBREMOTEPACKETS_H
#define LLDB_UTILITY_TRACEGDBREMOTEPACKETS_H

#include "llvm/Support/JSON.h"
#include <chrono>

#include "lldb/lldb-defines.h"
#include "lldb/lldb-enumerations.h"

/// See docs/lldb-gdb-remote.txt for more information.
namespace lldb_private {

/// jLLDBTraceSupported gdb-remote packet
/// \{
struct TraceSupportedResponse {
  /// The name of the technology, e.g. intel-pt or arm-coresight.
  ///
  /// In order for a Trace plug-in (see \a lldb_private::Trace.h) to support the
  /// trace technology given by this struct, it should match its name with this
  /// field.
  std::string name;
  /// The description for the technology.
  std::string description;
};

bool fromJSON(const llvm::json::Value &value, TraceSupportedResponse &info,
              llvm::json::Path path);

llvm::json::Value toJSON(const TraceSupportedResponse &packet);
/// \}

/// jLLDBTraceStart gdb-remote packet
/// \{
struct TraceStartRequest {
  /// Tracing technology name, e.g. intel-pt, arm-coresight.
  std::string type;

  /// If \a llvm::None, then this starts tracing the whole process. Otherwise,
  /// only tracing for the specified threads is enabled.
  llvm::Optional<std::vector<int64_t>> tids;

  /// \return
  ///     \b true if \a tids is \a None, i.e. whole process tracing.
  bool IsProcessTracing() const;
};

bool fromJSON(const llvm::json::Value &value, TraceStartRequest &packet,
              llvm::json::Path path);

llvm::json::Value toJSON(const TraceStartRequest &packet);
/// \}

/// jLLDBTraceStop gdb-remote packet
/// \{
struct TraceStopRequest {
  TraceStopRequest() = default;

  TraceStopRequest(llvm::StringRef type, const std::vector<lldb::tid_t> &tids);

  TraceStopRequest(llvm::StringRef type) : type(type){};

  bool IsProcessTracing() const;

  /// Tracing technology name, e.g. intel-pt, arm-coresight.
  std::string type;
  /// If \a llvm::None, then this stops tracing the whole process. Otherwise,
  /// only tracing for the specified threads is stopped.
  llvm::Optional<std::vector<int64_t>> tids;
};

bool fromJSON(const llvm::json::Value &value, TraceStopRequest &packet,
              llvm::json::Path path);

llvm::json::Value toJSON(const TraceStopRequest &packet);
///}

/// jLLDBTraceGetState gdb-remote packet
/// \{
struct TraceGetStateRequest {
  /// Tracing technology name, e.g. intel-pt, arm-coresight.
  std::string type;
};

bool fromJSON(const llvm::json::Value &value, TraceGetStateRequest &packet,
              llvm::json::Path path);

llvm::json::Value toJSON(const TraceGetStateRequest &packet);

struct TraceBinaryData {
  /// Identifier of data to fetch with jLLDBTraceGetBinaryData.
  std::string kind;
  /// Size in bytes for this data.
  int64_t size;
};

bool fromJSON(const llvm::json::Value &value, TraceBinaryData &packet,
              llvm::json::Path path);

llvm::json::Value toJSON(const TraceBinaryData &packet);

struct TraceThreadState {
  int64_t tid;
  /// List of binary data objects for this thread.
  std::vector<TraceBinaryData> binaryData;
};

bool fromJSON(const llvm::json::Value &value, TraceThreadState &packet,
              llvm::json::Path path);

llvm::json::Value toJSON(const TraceThreadState &packet);

/// Interface for different algorithms used to convert trace
/// counters into different units.
template <typename ToType> class TraceCounterConversion {
public:
  virtual ~TraceCounterConversion() = default;

  /// Convert from raw counter value to the target type.
  ///
  /// \param[in] raw_counter_value
  ///   The raw counter value to be converted.
  ///
  /// \return
  ///   The converted counter value.
  virtual ToType Convert(uint64_t raw_counter_value) = 0;

  /// Serialize trace counter conversion values to JSON.
  ///
  /// \return
  ///   \a llvm::json::Value representing the trace counter conversion object.
  virtual llvm::json::Value toJSON() = 0;
};

using TraceTscConversionUP =
    std::unique_ptr<TraceCounterConversion<std::chrono::nanoseconds>>;

struct TraceGetStateResponse {
  std::vector<TraceThreadState> tracedThreads;
  std::vector<TraceBinaryData> processBinaryData;
};

bool fromJSON(const llvm::json::Value &value, TraceGetStateResponse &packet,
              llvm::json::Path path);

llvm::json::Value toJSON(const TraceGetStateResponse &packet);
/// \}

/// jLLDBTraceGetBinaryData gdb-remote packet
/// \{
struct TraceGetBinaryDataRequest {
  /// Tracing technology name, e.g. intel-pt, arm-coresight.
  std::string type;
  /// Identifier for the data.
  std::string kind;
  /// Optional tid if the data is related to a thread.
  llvm::Optional<int64_t> tid;
  /// Offset in bytes from where to start reading the data.
  int64_t offset;
  /// Number of bytes to read.
  int64_t size;
};

bool fromJSON(const llvm::json::Value &value,
              lldb_private::TraceGetBinaryDataRequest &packet,
              llvm::json::Path path);

llvm::json::Value toJSON(const lldb_private::TraceGetBinaryDataRequest &packet);
/// \}

} // namespace lldb_private

#endif // LLDB_UTILITY_TRACEGDBREMOTEPACKETS_H