1 //===- XRayRecord.h - XRay Trace Record -----------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file replicates the record definition for XRay log entries. This should
11 // follow the evolution of the log record versions supported in the compiler-rt
14 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_XRAY_XRAY_RECORD_H
16 #define LLVM_XRAY_XRAY_RECORD_H
25 /// XRay traces all have a header providing some top-matter information useful
26 /// to help tools determine how to interpret the information available in the
28 struct XRayFileHeader {
29 /// Version of the XRay implementation that produced this file.
32 /// A numeric identifier for the type of file this is. Best used in
33 /// combination with Version.
36 /// Whether the CPU that produced the timestamp counters (TSC) move at a
40 /// Whether the CPU that produced the timestamp counters (TSC) do not stop.
43 /// The number of cycles per second for the CPU that produced the timestamp
44 /// counter (TSC) values. Useful for estimating the amount of time that
45 /// elapsed between two TSCs on some platforms.
46 uint64_t CycleFrequency = 0;
48 // This is different depending on the type of xray record. The naive format
49 // stores a Wallclock timespec. FDR logging stores the size of a thread
51 char FreeFormData[16];
54 /// Determines the supported types of records that could be seen in XRay traces.
55 /// This may or may not correspond to actual record types in the raw trace (as
56 /// the loader implementation may synthesize this information in the process of
58 enum class RecordTypes {
67 /// An XRayRecord is the denormalized view of data associated in a trace. These
68 /// records may not correspond to actual entries in the raw traces, but they are
69 /// the logical representation of records in a higher-level event log.
71 /// RecordType values are used as "sub-types" which have meaning in the
72 /// context of the `Type` below. For function call and custom event records,
73 /// the RecordType is always 0, while for typed events we store the type in
74 /// the RecordType field.
77 /// The CPU where the thread is running. We assume number of CPUs <= 65536.
80 /// Identifies the type of record.
83 /// The function ID for the record, if this is a function call record.
86 /// Get the full 8 bytes of the TSC when we get the log record.
89 /// The thread ID for the currently running thread.
92 /// The process ID for the currently running process.
95 /// The function call arguments.
96 std::vector<uint64_t> CallArgs;
98 /// For custom and typed events, we provide the raw data from the trace.
105 #endif // LLVM_XRAY_XRAY_RECORD_H