class Recorder

class Recorder

Defined at line 31 of file ../../src/performance/memory/sampler/instrumentation/recorder.h

Allocation recorder. This class is designed to be initialized in

static storage, to be thread safe, and to be suitable for use

during an allocation or a deallocation (by being safe to call

from within the scudo allocation hooks).

It establishes a FIDL connection to a sampling profiler on

startup, reports allocations and deallocations, and relevant

information to support symbolization of the collected profiles.

Public Members

static const size_t kSamplingIntervalBytes

Public Methods

void Recorder (const Recorder & )

Defined at line 33 of file ../../src/performance/memory/sampler/instrumentation/recorder.h

void Recorder (Recorder && )

Defined at line 33 of file ../../src/performance/memory/sampler/instrumentation/recorder.h

Recorder & operator= (const Recorder & )

Defined at line 33 of file ../../src/performance/memory/sampler/instrumentation/recorder.h

Recorder & operator= (Recorder && )

Defined at line 33 of file ../../src/performance/memory/sampler/instrumentation/recorder.h

Recorder * Get ()

Returns a reference to the singleton object, initializing (and

blocking) it if necessary.

Defined at line 60 of file ../../src/performance/memory/sampler/instrumentation/recorder.cc

Recorder * GetIfReady ()

Returns a pointer to the singleton object if it is initialized;

returns nullptr otherwise.

Defined at line 66 of file ../../src/performance/memory/sampler/instrumentation/recorder.cc

void MaybeRecordAllocation (void * address, size_t size)

Decides whether to discard or sample this allocation, and acts

appropriately.

Defined at line 73 of file ../../src/performance/memory/sampler/instrumentation/recorder.cc

void MaybeForgetAllocation (void * address)

Decides whether to discard or sample this deallocation, and acts

appropriately.

Defined at line 103 of file ../../src/performance/memory/sampler/instrumentation/recorder.cc

void SetModulesInfo ()

Collects the module layout of the current process and

communicates it to the profiler.

Defined at line 133 of file ../../src/performance/memory/sampler/instrumentation/recorder.cc

Recorder CreateRecorderForTesting (fidl::SyncClient<fuchsia_memory_sampler::Sampler> client, std::function<PoissonSampler &()> get_poisson_sampler)

Convenience factory method for use in tests. This eschews the

singleton interface, and supports providing a custom FIDL

client. It does not perform any of the initialisations handled by

the singleton interface. This should not be used outside of tests.

Defined at line 186 of file ../../src/performance/memory/sampler/instrumentation/recorder.cc