blob: 6e7a3596e92ea0ffca03ebe50dddab59fed4d0a0 [file] [log] [blame]
// Copyright 2017 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <cstddef>
#include <cstdint>
#include <lib/zircon-internal/device/cpu-trace/perf-mon.h>
namespace perfmon {
// When reading sample data, the record we read is one of these.
// To avoid unnecessary copying of the larger records we just return a
// pointer to the record, which will remain valid until the next record
// is read.
union SampleRecord {
const RecordHeader* header;
const TimeRecord* time;
const TickRecord* tick;
const CountRecord* count;
const ValueRecord* value;
const PcRecord* pc;
const LastBranchRecord* last_branch;
// Ideally this would return the enum type, but we don't make any
// assumptions about the validity of the trace data.
uint8_t type() const { return header->type; }
EventId event() const { return header->event; }
// Returns |kRecordTypeInvalid| for an invalid record type.
RecordType GetRecordType(const RecordHeader* hdr);
// Returns 0 for an invalid record type or invalid record.
size_t GetRecordSize(const RecordHeader* hdr);
} // namespace perfmon