aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/llvm16/include/llvm/XRay/BlockVerifier.h
blob: 279662ded1a1f4863db37eaefe4883cb25805bef (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
#pragma once

#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif

//===- BlockVerifier.h - FDR Block Verifier -------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// An implementation of the RecordVisitor which verifies a sequence of records
// associated with a block, following the FDR mode log format's specifications.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_XRAY_BLOCKVERIFIER_H
#define LLVM_XRAY_BLOCKVERIFIER_H

#include "llvm/XRay/FDRRecords.h"
#include <array>
#include <bitset>

namespace llvm {
namespace xray {

class BlockVerifier : public RecordVisitor {
public:
  // We force State elements to be size_t, to be used as indices for containers.
  enum class State : std::size_t {
    Unknown,
    BufferExtents,
    NewBuffer,
    WallClockTime,
    PIDEntry,
    NewCPUId,
    TSCWrap,
    CustomEvent,
    TypedEvent,
    Function,
    CallArg,
    EndOfBuffer,
    StateMax,
  };

private:
  // We keep track of the current record seen by the verifier.
  State CurrentRecord = State::Unknown;

  // Transitions the current record to the new record, records an error on
  // invalid transitions.
  Error transition(State To);

public:
  Error visit(BufferExtents &) override;
  Error visit(WallclockRecord &) override;
  Error visit(NewCPUIDRecord &) override;
  Error visit(TSCWrapRecord &) override;
  Error visit(CustomEventRecord &) override;
  Error visit(CallArgRecord &) override;
  Error visit(PIDRecord &) override;
  Error visit(NewBufferRecord &) override;
  Error visit(EndBufferRecord &) override;
  Error visit(FunctionRecord &) override;
  Error visit(CustomEventRecordV5 &) override;
  Error visit(TypedEventRecord &) override;

  Error verify();
  void reset();
};

} // namespace xray
} // namespace llvm

#endif // LLVM_XRAY_BLOCKVERIFIER_H

#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif