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
|
//===-- xray_utils.h --------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is a part of XRay, a dynamic runtime instrumentation system.
//
// Some shared utilities for the XRay runtime implementation.
//
//===----------------------------------------------------------------------===//
#ifndef XRAY_UTILS_H
#define XRAY_UTILS_H
#include <sys/types.h>
#include <utility>
namespace __xray {
// Default implementation of the reporting interface for sanitizer errors.
void printToStdErr(const char *Buffer);
// EINTR-safe write routine, provided a file descriptor and a character range.
void retryingWriteAll(int Fd, const char *Begin, const char *End);
// Reads a long long value from a provided file.
bool readValueFromFile(const char *Filename, long long *Value);
// EINTR-safe read routine, providing a file descriptor and a character range.
std::pair<ssize_t, bool> retryingReadSome(int Fd, char *Begin, char *End);
// EINTR-safe open routine, uses flag-provided values for initialising a log
// file.
int getLogFD();
constexpr size_t gcd(size_t a, size_t b) {
return (b == 0) ? a : gcd(b, a % b);
}
constexpr size_t lcm(size_t a, size_t b) { return a * b / gcd(a, b); }
constexpr size_t nearest_boundary(size_t number, size_t multiple) {
return multiple * ((number / multiple) + (number % multiple ? 1 : 0));
}
constexpr size_t next_pow2_helper(size_t num, size_t acc) {
return (1u << acc) >= num ? (1u << acc) : next_pow2_helper(num, acc + 1);
}
constexpr size_t next_pow2(size_t number) {
return next_pow2_helper(number, 1);
}
} // namespace __xray
#endif // XRAY_UTILS_H
|
