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Diffstat (limited to 'src/vppinfra/sanitizer.h')
| -rw-r--r-- | src/vppinfra/sanitizer.h | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/src/vppinfra/sanitizer.h b/src/vppinfra/sanitizer.h deleted file mode 100644 index cf2da071225..00000000000 --- a/src/vppinfra/sanitizer.h +++ /dev/null @@ -1,147 +0,0 @@ -#ifndef _included_clib_sanitizer_h -#define _included_clib_sanitizer_h - -#ifdef CLIB_SANITIZE_ADDR - -#include <sanitizer/asan_interface.h> -#include <vppinfra/clib.h> -#include <vppinfra/error_bootstrap.h> - -typedef struct -{ - size_t shadow_scale; - size_t shadow_offset; -} clib_sanitizer_main_t; - -extern clib_sanitizer_main_t sanitizer_main; - -#define CLIB_NOSANITIZE_ADDR __attribute__((no_sanitize_address)) -#define CLIB_MEM_POISON(a, s) ASAN_POISON_MEMORY_REGION((a), (s)) -#define CLIB_MEM_UNPOISON(a, s) ASAN_UNPOISON_MEMORY_REGION((a), (s)) - -#define CLIB_MEM_OVERFLOW_MAX 64 - -static_always_inline void -sanitizer_unpoison__ (u64 *restrict *shadow_ptr, size_t *shadow_len, - const void *ptr, size_t len) -{ - size_t scale, off; - - if (PREDICT_FALSE (~0 == sanitizer_main.shadow_scale)) - __asan_get_shadow_mapping (&sanitizer_main.shadow_scale, - &sanitizer_main.shadow_offset); - - scale = sanitizer_main.shadow_scale; - off = sanitizer_main.shadow_offset; - - /* compute the shadow address and length */ - *shadow_len = len >> scale; - ASSERT (*shadow_len <= CLIB_MEM_OVERFLOW_MAX); - *shadow_ptr = (void *) (((clib_address_t) ptr >> scale) + off); -} - -static_always_inline CLIB_NOSANITIZE_ADDR void -sanitizer_unpoison_push__ (u64 *restrict shadow, const void *ptr, size_t len) -{ - u64 *restrict shadow_ptr; - size_t shadow_len; - int i; - - sanitizer_unpoison__ (&shadow_ptr, &shadow_len, ptr, len); - - /* save the shadow area */ - for (i = 0; i < shadow_len; i++) - shadow[i] = shadow_ptr[i]; - - /* unpoison */ - for (i = 0; i < shadow_len; i++) - shadow_ptr[i] = 0; -} - -static_always_inline CLIB_NOSANITIZE_ADDR void -sanitizer_unpoison_pop__ (const u64 *restrict shadow, const void *ptr, - size_t len) -{ - u64 *restrict shadow_ptr; - size_t shadow_len; - int i; - - sanitizer_unpoison__ (&shadow_ptr, &shadow_len, ptr, len); - - /* restore the shadow area */ - for (i = 0; i < shadow_len; i++) - { - ASSERT (0 == shadow_ptr[i]); - shadow_ptr[i] = shadow[i]; - } -} - -#define CLIB_MEM_OVERFLOW_PUSH(src, n) \ - do \ - { \ - const void *clib_mem_overflow_src__ = (src); \ - size_t clib_mem_overflow_n__ = (n); \ - u64 clib_mem_overflow_shadow__; \ - sanitizer_unpoison_push__ (&clib_mem_overflow_shadow__, \ - clib_mem_overflow_src__, \ - clib_mem_overflow_n__) - -#define CLIB_MEM_OVERFLOW_POP() \ - sanitizer_unpoison_pop__ (&clib_mem_overflow_shadow__, \ - clib_mem_overflow_src__, clib_mem_overflow_n__); \ - } \ - while (0) - -#define CLIB_MEM_OVERFLOW_LOAD(src) \ - ({ \ - typeof (*(src)) *clib_mem_overflow_load_src__ = (src), \ - clib_mem_overflow_load_ret__; \ - CLIB_MEM_OVERFLOW_PUSH (clib_mem_overflow_load_src__, \ - sizeof (*clib_mem_overflow_load_src__)); \ - clib_mem_overflow_load_ret__ = *clib_mem_overflow_load_src__; \ - CLIB_MEM_OVERFLOW_POP (); \ - clib_mem_overflow_load_ret__; \ - }) - -static_always_inline void -CLIB_MEM_POISON_LEN (void *src, size_t oldlen, size_t newlen) -{ - if (oldlen > newlen) - CLIB_MEM_POISON (src + newlen, oldlen - newlen); - else if (newlen > oldlen) - CLIB_MEM_UNPOISON (src + oldlen, newlen - oldlen); -} - -#else /* CLIB_SANITIZE_ADDR */ - -#define CLIB_NOSANITIZE_ADDR -#define CLIB_MEM_POISON(a, s) (void)(a) -#define CLIB_MEM_UNPOISON(a, s) (void)(a) -#define CLIB_MEM_OVERFLOW_PUSH(a, b) (void) (a) -#define CLIB_MEM_OVERFLOW_POP() -#define CLIB_MEM_OVERFLOW_LOAD(src) (*(src)) -#define CLIB_MEM_POISON_LEN(a, b, c) - -#endif /* CLIB_SANITIZE_ADDR */ - -/* - * clang tends to force alignment of all sections when compiling for address - * sanitizer. This confuse VPP plugin infra, prevent clang to do that - * On the contrary, GCC does not support this kind of attribute on sections - * sigh. - */ -#ifdef __clang__ -#define CLIB_NOSANITIZE_PLUGIN_REG_SECTION CLIB_NOSANITIZE_ADDR -#else -#define CLIB_NOSANITIZE_PLUGIN_REG_SECTION -#endif - -#endif /* _included_clib_sanitizer_h */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |