lldb_private::trace_intel_pt::ThreadDecoder Class Reference

Class that handles the decoding of a thread and caches the result. More...

#include <ThreadDecoder.h>

Public Member Functions
	ThreadDecoder (const lldb::ThreadSP &thread_sp, TraceIntelPT &trace)
llvm::Expected< DecodedThreadSP >	Decode ()
	Decode the thread and store the result internally, to avoid recomputations.
llvm::Expected< std::optional< uint64_t > >	FindLowestTSC ()
	ThreadDecoder (const ThreadDecoder &other)=delete
ThreadDecoder &	operator= (const ThreadDecoder &other)=delete

Private Member Functions
llvm::Expected< DecodedThreadSP >	DoDecode ()

Private Attributes
lldb::ThreadSP	m_thread_sp
TraceIntelPT &	m_trace
std::optional< DecodedThreadSP >	m_decoded_thread

Detailed Description

Class that handles the decoding of a thread and caches the result.

Definition at line 23 of file ThreadDecoder.h.

Constructor & Destructor Documentation

ThreadDecoder() [1/2]

ThreadDecoder::ThreadDecoder	(	const lldb::ThreadSP &	thread_sp,
		TraceIntelPT &	trace
	)

Parameters

[in]	thread_sp	The thread whose intel pt trace buffer will be decoded.
[in]	trace	The main Trace object who owns this decoder and its data.

Definition at line 21 of file ThreadDecoder.cpp.

ThreadDecoder() [2/2]

lldb_private::trace_intel_pt::ThreadDecoder::ThreadDecoder ( const ThreadDecoder &  other )

delete

Member Function Documentation

Decode()

Expected< DecodedThreadSP > ThreadDecoder::Decode

(

)

Decode the thread and store the result internally, to avoid recomputations.

Returns

A DecodedThread instance.

Definition at line 40 of file ThreadDecoder.cpp.

References DoDecode(), and m_decoded_thread.

DoDecode()

llvm::Expected< DecodedThreadSP > ThreadDecoder::DoDecode ( )

private

Definition at line 51 of file ThreadDecoder.cpp.

References lldb_private::trace_intel_pt::TraceIntelPT::GetPerfZeroTscConversion(), lldb_private::trace_intel_pt::TraceIntelPT::GetThreadTimer(), m_thread_sp, m_trace, lldb_private::trace_intel_pt::TraceIntelPT::OnThreadBufferRead(), and lldb_private::trace_intel_pt::ScopedTaskTimer::TimeTask().

Referenced by Decode().

FindLowestTSC()

Expected< std::optional< uint64_t > > ThreadDecoder::FindLowestTSC

(

)

Returns

The lowest TSC value in this trace if available, std::nullopt if the trace is empty or the trace contains no timing information, or an llvm::Error if it was not possible to set up the decoder.

Definition at line 24 of file ThreadDecoder.cpp.

References m_thread_sp, m_trace, and lldb_private::trace_intel_pt::TraceIntelPT::OnThreadBufferRead().

operator=()

ThreadDecoder & lldb_private::trace_intel_pt::ThreadDecoder::operator= ( const ThreadDecoder &  other )

delete

Member Data Documentation

m_decoded_thread

std::optional<DecodedThreadSP> lldb_private::trace_intel_pt::ThreadDecoder::m_decoded_thread

private

Definition at line 53 of file ThreadDecoder.h.

Referenced by Decode().

m_thread_sp

lldb::ThreadSP lldb_private::trace_intel_pt::ThreadDecoder::m_thread_sp

private

Definition at line 51 of file ThreadDecoder.h.

Referenced by DoDecode(), and FindLowestTSC().

m_trace

TraceIntelPT& lldb_private::trace_intel_pt::ThreadDecoder::m_trace

private

Definition at line 52 of file ThreadDecoder.h.

Referenced by DoDecode(), and FindLowestTSC().

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The documentation for this class was generated from the following files:

• ThreadDecoder.h
• ThreadDecoder.cpp