92 lines
2.8 KiB
C++
92 lines
2.8 KiB
C++
//===-- IntelPTCollector.h ------------------------------------ -*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef liblldb_IntelPTCollector_H_
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#define liblldb_IntelPTCollector_H_
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#include "IntelPTMultiCoreTrace.h"
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#include "IntelPTPerThreadProcessTrace.h"
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#include "IntelPTSingleBufferTrace.h"
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#include "Perf.h"
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#include "lldb/Host/common/NativeProcessProtocol.h"
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#include "lldb/Utility/Status.h"
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#include "lldb/Utility/TraceIntelPTGDBRemotePackets.h"
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#include "lldb/lldb-types.h"
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#include <linux/perf_event.h>
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#include <sys/mman.h>
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#include <unistd.h>
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namespace lldb_private {
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namespace process_linux {
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/// Main class that manages intel-pt process and thread tracing.
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class IntelPTCollector {
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public:
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/// \param[in] process
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/// Process to be traced.
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IntelPTCollector(NativeProcessProtocol &process);
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static bool IsSupported();
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/// To be invoked as soon as we know the process stopped.
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void ProcessDidStop();
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/// To be invoked before the process will resume, so that we can capture the
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/// first instructions after the resume.
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void ProcessWillResume();
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/// If "process tracing" is enabled, then trace the given thread.
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llvm::Error OnThreadCreated(lldb::tid_t tid);
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/// Stops tracing a tracing upon a destroy event.
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llvm::Error OnThreadDestroyed(lldb::tid_t tid);
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/// Implementation of the jLLDBTraceStop packet
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llvm::Error TraceStop(const TraceStopRequest &request);
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/// Implementation of the jLLDBTraceStart packet
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llvm::Error TraceStart(const TraceIntelPTStartRequest &request);
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/// Implementation of the jLLDBTraceGetState packet
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llvm::Expected<llvm::json::Value> GetState();
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/// Implementation of the jLLDBTraceGetBinaryData packet
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llvm::Expected<std::vector<uint8_t>>
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GetBinaryData(const TraceGetBinaryDataRequest &request);
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/// Dispose of all traces
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void Clear();
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private:
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llvm::Error TraceStop(lldb::tid_t tid);
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/// Start tracing a specific thread.
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llvm::Error TraceStart(lldb::tid_t tid,
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const TraceIntelPTStartRequest &request);
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/// \return
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/// The conversion object between TSC and wall time.
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llvm::Expected<LinuxPerfZeroTscConversion &>
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FetchPerfTscConversionParameters();
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/// The target process.
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NativeProcessProtocol &m_process;
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/// Threads traced due to "thread tracing"
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IntelPTThreadTraceCollection m_thread_traces;
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/// Only one instance of "process trace" can be active at a given time.
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/// It might be \b nullptr.
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IntelPTProcessTraceUP m_process_trace_up;
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};
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} // namespace process_linux
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} // namespace lldb_private
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#endif // liblldb_IntelPTCollector_H_
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