FD.io VPP  v20.01-9-g24064d02a
Vector Packet Processing
sanitizer.h
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1 #ifndef _included_clib_sanitizer_h
2 #define _included_clib_sanitizer_h
3 
4 #ifdef CLIB_SANITIZE_ADDR
5 
6 #include <sanitizer/asan_interface.h>
7 #include <vppinfra/clib.h>
8 
9 #define CLIB_NOSANITIZE_ADDR __attribute__((no_sanitize_address))
10 #define CLIB_MEM_POISON(a, s) ASAN_POISON_MEMORY_REGION((a), (s))
11 #define CLIB_MEM_UNPOISON(a, s) ASAN_UNPOISON_MEMORY_REGION((a), (s))
12 
13 #define CLIB_MEM_OVERFLOW(f, src, n) \
14  ({ \
15  typeof (f) clib_mem_overflow_ret__; \
16  const void *clib_mem_overflow_src__ = (src); \
17  size_t clib_mem_overflow_n__ = (n); \
18  const void *clib_mem_overflow_start__ = __asan_region_is_poisoned((void *)clib_mem_overflow_src__, clib_mem_overflow_n__); \
19  clib_mem_overflow_n__ -= (size_t)(clib_mem_overflow_start__ - clib_mem_overflow_src__); \
20  if (clib_mem_overflow_start__) \
21  CLIB_MEM_UNPOISON(clib_mem_overflow_start__, clib_mem_overflow_n__); \
22  clib_mem_overflow_ret__ = f; \
23  if (clib_mem_overflow_start__) \
24  CLIB_MEM_POISON(clib_mem_overflow_start__, clib_mem_overflow_n__); \
25  clib_mem_overflow_ret__; \
26  })
27 
28 #define CLIB_MEM_OVERFLOW_LOAD(f, src) \
29  ({ \
30  typeof(src) clib_mem_overflow_load_src__ = (src); \
31  CLIB_MEM_OVERFLOW(f(clib_mem_overflow_load_src__), clib_mem_overflow_load_src__, sizeof(typeof(f(clib_mem_overflow_load_src__)))); \
32  })
33 
35 CLIB_MEM_POISON_LEN (void *src, size_t oldlen, size_t newlen)
36 {
37  if (oldlen > newlen)
38  CLIB_MEM_POISON (src + newlen, oldlen - newlen);
39  else if (newlen > oldlen)
40  CLIB_MEM_UNPOISON (src + oldlen, newlen - oldlen);
41 }
42 
43 #else /* CLIB_SANITIZE_ADDR */
44 
45 #define CLIB_NOSANITIZE_ADDR
46 #define CLIB_MEM_POISON(a, s) (void)(a)
47 #define CLIB_MEM_UNPOISON(a, s) (void)(a)
48 #define CLIB_MEM_OVERFLOW(a, b, c) a
49 #define CLIB_MEM_OVERFLOW_LOAD(f, src) f(src)
50 #define CLIB_MEM_POISON_LEN(a, b, c)
51 
52 #endif /* CLIB_SANITIZE_ADDR */
53 
54 #endif /* _included_clib_sanitizer_h */
55 
56 /*
57  * fd.io coding-style-patch-verification: ON
58  *
59  * Local Variables:
60  * eval: (c-set-style "gnu")
61  * End:
62  */
#define CLIB_MEM_UNPOISON(a, s)
Definition: sanitizer.h:47
#define CLIB_MEM_POISON_LEN(a, b, c)
Definition: sanitizer.h:50
#define static_always_inline
Definition: clib.h:99
#define CLIB_MEM_POISON(a, s)
Definition: sanitizer.h:46