sanitizer_libc.cc revision f7667cc84cdd8923c0b6c7cfc92b7bd5692ce18c 
1//===-- sanitizer_libc.cc -------------------------------------------------===//
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. See sanitizer_libc.h for details.
12//===----------------------------------------------------------------------===//
13#include "sanitizer_common.h"
14#include "sanitizer_libc.h"
15
16namespace __sanitizer {
17
18void MiniLibcStub() {
19}
20
21void *internal_memchr(const void *s, int c, uptr n) {
22  const char* t = (char*)s;
23  for (uptr i = 0; i < n; ++i, ++t)
24    if (*t == c)
25      return (void*)t;
26  return 0;
27}
28
29void *internal_memcpy(void *dest, const void *src, uptr n) {
30  char *d = (char*)dest;
31  char *s = (char*)src;
32  for (uptr i = 0; i < n; ++i)
33    d[i] = s[i];
34  return dest;
35}
36
37char* internal_strdup(const char *s) {
38  uptr len = internal_strlen(s);
39  char *s2 = (char*)InternalAlloc(len + 1);
40  internal_memcpy(s2, s, len);
41  s2[len] = 0;
42  return s2;
43}
44
45int internal_strcmp(const char *s1, const char *s2) {
46  while (true) {
47    unsigned c1 = *s1;
48    unsigned c2 = *s2;
49    if (c1 != c2) return (c1 < c2) ? -1 : 1;
50    if (c1 == 0) break;
51    s1++;
52    s2++;
53  }
54  return 0;
55}
56
57uptr internal_strlen(const char *s) {
58  uptr i = 0;
59  while (s[i]) i++;
60  return i;
61}
62
63char *internal_strncpy(char *dst, const char *src, uptr n) {
64  uptr i;
65  for (i = 0; i < n && src[i]; i++)
66    dst[i] = src[i];
67  for (; i < n; i++)
68    dst[i] = '\0';
69  return dst;
70}
71
72}  // namespace __sanitizer
73