Coverage Report

Created: 2019-07-24 05:18

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/lld/include/lld/Core/Instrumentation.h
Line
Count
Source (jump to first uncovered line)
1
//===- include/Core/Instrumentation.h - Instrumentation API ---------------===//
2
//
3
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4
// See https://llvm.org/LICENSE.txt for license information.
5
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6
//
7
//===----------------------------------------------------------------------===//
8
///
9
/// \file
10
/// Provide an Instrumentation API that optionally uses VTune interfaces.
11
///
12
//===----------------------------------------------------------------------===//
13
14
#ifndef LLD_CORE_INSTRUMENTATION_H
15
#define LLD_CORE_INSTRUMENTATION_H
16
17
#include "llvm/Support/Compiler.h"
18
#include <utility>
19
20
#ifdef LLD_HAS_VTUNE
21
# include <ittnotify.h>
22
#endif
23
24
namespace lld {
25
#ifdef LLD_HAS_VTUNE
26
/// A unique global scope for instrumentation data.
27
///
28
/// Domains last for the lifetime of the application and cannot be destroyed.
29
/// Multiple Domains created with the same name represent the same domain.
30
class Domain {
31
  __itt_domain *_domain;
32
33
public:
34
  explicit Domain(const char *name) : _domain(__itt_domain_createA(name)) {}
35
36
  operator __itt_domain *() const { return _domain; }
37
  __itt_domain *operator->() const { return _domain; }
38
};
39
40
/// A global reference to a string constant.
41
///
42
/// These are uniqued by the ITT runtime and cannot be deleted. They are not
43
/// specific to a domain.
44
///
45
/// Prefer reusing a single StringHandle over passing a ntbs when the same
46
/// string will be used often.
47
class StringHandle {
48
  __itt_string_handle *_handle;
49
50
public:
51
  StringHandle(const char *name) : _handle(__itt_string_handle_createA(name)) {}
52
53
  operator __itt_string_handle *() const { return _handle; }
54
};
55
56
/// A task on a single thread. Nests within other tasks.
57
///
58
/// Each thread has its own task stack and tasks nest recursively on that stack.
59
/// A task cannot transfer threads.
60
///
61
/// SBRM is used to ensure task starts and ends are ballanced. The lifetime of
62
/// a task is either the lifetime of this object, or until end is called.
63
class ScopedTask {
64
  __itt_domain *_domain;
65
66
  ScopedTask(const ScopedTask &) = delete;
67
  ScopedTask &operator=(const ScopedTask &) = delete;
68
69
public:
70
  /// Create a task in Domain \p d named \p s.
71
  ScopedTask(const Domain &d, const StringHandle &s) : _domain(d) {
72
    __itt_task_begin(d, __itt_null, __itt_null, s);
73
  }
74
75
  ScopedTask(ScopedTask &&other) {
76
    *this = std::move(other);
77
  }
78
79
  ScopedTask &operator=(ScopedTask &&other) {
80
    _domain = other._domain;
81
    other._domain = nullptr;
82
    return *this;
83
  }
84
85
  /// Prematurely end this task.
86
  void end() {
87
    if (_domain)
88
      __itt_task_end(_domain);
89
    _domain = nullptr;
90
  }
91
92
  ~ScopedTask() { end(); }
93
};
94
95
/// A specific point in time. Allows metadata to be associated.
96
class Marker {
97
public:
98
  Marker(const Domain &d, const StringHandle &s) {
99
    __itt_marker(d, __itt_null, s, __itt_scope_global);
100
  }
101
};
102
#else
103
class Domain {
104
public:
105
184
  Domain(const char *name) {}
106
};
107
108
class StringHandle {
109
public:
110
1.90k
  StringHandle(const char *name) {}
111
};
112
113
class ScopedTask {
114
public:
115
1.90k
  ScopedTask(const Domain &d, const StringHandle &s) {}
116
339
  void end() {}
117
};
118
119
class Marker {
120
public:
121
0
  Marker(const Domain &d, const StringHandle &s) {}
122
};
123
#endif
124
125
1.90k
inline const Domain &getDefaultDomain() {
126
1.90k
  static Domain domain("org.llvm.lld");
127
1.90k
  return domain;
128
1.90k
}
129
} // end namespace lld.
130
131
#endif