sanitizer_common.h revision 7fdcdf5a3a7090ec86d426a815bb42f3d35adf13 
1//===-- sanitizer_common.h --------------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file is shared between AddressSanitizer and ThreadSanitizer
11// run-time libraries.
12// It declares common functions and classes that are used in both runtimes.
13// Implementation of some functions are provided in sanitizer_common, while
14// others must be defined by run-time library itself.
15//===----------------------------------------------------------------------===//
16#ifndef SANITIZER_COMMON_H
17#define SANITIZER_COMMON_H
18
19#include "sanitizer_internal_defs.h"
20
21namespace __sanitizer {
22
23// NOTE: Functions below must be defined in each run-time. {{{
24void NORETURN Die();
25// }}}
26
27// Constants.
28const uptr kWordSize = __WORDSIZE / 8;
29const uptr kWordSizeInBits = 8 * kWordSize;
30const uptr kPageSizeBits = 12;
31const uptr kPageSize = 1UL << kPageSizeBits;
32
33int GetPid();
34void RawWrite(const char *buffer);
35void *MmapOrDie(uptr size);
36void UnmapOrDie(void *addr, uptr size);
37
38void Printf(const char *format, ...);
39int SNPrintf(char *buffer, uptr length, const char *format, ...);
40void Report(const char *format, ...);
41
42// Bit twiddling.
43inline bool IsPowerOfTwo(uptr x) {
44  return (x & (x - 1)) == 0;
45}
46inline uptr RoundUpTo(uptr size, uptr boundary) {
47  // FIXME: Use CHECK here.
48  RAW_CHECK(IsPowerOfTwo(boundary));
49  return (size + boundary - 1) & ~(boundary - 1);
50}
51
52}  // namespace __sanitizer
53
54#endif  // SANITIZER_COMMON_H
55