PerfettoTracingSingleton Class Reference

Collaboration diagram for PerfettoTracingSingleton:

Public Member Functions
bool	initialise (unsigned backends)
bool	isTracing () const
bool	startInProcessTracing (int fd, const std::string &categoryFilter)
void	stopInProcessTracing ()

Static Public Member Functions
static PerfettoTracingSingleton *	instance ()

Static Private Member Functions
static void	cleanUp ()

Private Attributes
std::mutex	mLock
bool	mInitialised
unsigned	mBackends
int	mTraceFileFd
std::unique_ptr< perfetto::TracingSession >	mInProcessSession

Static Private Attributes
static PerfettoTracingSingleton *	mInstance = nullptr
static pthread_rwlock_t	mInstanceLock = PTHREAD_RWLOCK_INITIALIZER

Member Function Documentation

initialise()

bool PerfettoTracingSingleton::initialise

(

unsigned

backends

)

Sets the tracing mode to either 'system' or 'in process'.

This is a one time operation, it is not possible to change the mode once set.

instance()

PerfettoTracingSingleton * PerfettoTracingSingleton::instance ( )

static

Get the singleton instance of the Perfetto tracing interface.

isTracing()

bool PerfettoTracingSingleton::isTracing

(

)

const

Returns true if currently tracing.

For in process tracing, this will return true if startInProcessTracing() was called. For system tracing this will only return true if the system traced daemon has started the trace.

startInProcessTracing()

bool PerfettoTracingSingleton::startInProcessTracing	(	int	fd,
		const std::string &	categoryFilter
	)

Starts an in process trace, writing the trace file to the given fd.

stopInProcessTracing()

void PerfettoTracingSingleton::stopInProcessTracing

(

)

Stops the 'in process' tracing.

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

• tracing/source/PerfettoTracingSingleton.h
• tracing/source/PerfettoTracingSingleton.cpp