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      1 /*
      2  *
      3  * honggfuzz - core macros and helpers
      4  * -----------------------------------------
      5  *
      6  * Author: Robert Swiecki <swiecki (at) google.com>
      7  *
      8  * Copyright 2010-2018 by Google Inc. All Rights Reserved.
      9  *
     10  * Licensed under the Apache License, Version 2.0 (the "License"); you may
     11  * not use this file except in compliance with the License. You may obtain
     12  * a copy of the License at
     13  *
     14  * http://www.apache.org/licenses/LICENSE-2.0
     15  *
     16  * Unless required by applicable law or agreed to in writing, software
     17  * distributed under the License is distributed on an "AS IS" BASIS,
     18  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
     19  * implied. See the License for the specific language governing
     20  * permissions and limitations under the License.
     21  *
     22  */
     23 
     24 #ifndef _HF_COMMON_COMMON_H_
     25 #define _HF_COMMON_COMMON_H_
     26 
     27 #include <stdlib.h>
     28 #include <unistd.h>
     29 
     30 /* Stringify */
     31 #define HF__XSTR(x) #x
     32 #define HF_XSTR(x) HF__XSTR(x)
     33 
     34 #define HF_ATTR_UNUSED __attribute__((unused))
     35 
     36 #ifndef ARRAYSIZE
     37 #define ARRAYSIZE(x) (sizeof(x) / sizeof(*x))
     38 #endif /* ifndef ARRAYSIZE */
     39 
     40 /* Memory barriers */
     41 #define rmb() __asm__ __volatile__("" ::: "memory")
     42 #define wmb() __sync_synchronize()
     43 
     44 /* TEMP_FAILURE_RETRY, but for all OSes */
     45 #ifndef TEMP_FAILURE_RETRY
     46 #define TEMP_FAILURE_RETRY(exp)                \
     47     ({                                         \
     48         __typeof(exp) _rc;                     \
     49         do {                                   \
     50             _rc = (exp);                       \
     51         } while (_rc == -1 && errno == EINTR); \
     52         _rc;                                   \
     53     })
     54 #endif /* ifndef TEMP_FAILURE_RETRY */
     55 
     56 #define HF_ATTR_NO_SANITIZE_ADDRESS
     57 #ifdef __has_feature
     58 #if __has_feature(address_sanitizer)
     59 #undef HF_ATTR_NO_SANITIZE_ADDRESS
     60 #define HF_ATTR_NO_SANITIZE_ADDRESS __attribute__((no_sanitize("address")))
     61 #endif /* if __has_feature(address_sanitizer) */
     62 #endif /* ifdef __has_feature */
     63 
     64 #define HF_ATTR_NO_SANITIZE_MEMORY
     65 #ifdef __has_feature
     66 #if __has_feature(memory_sanitizer)
     67 #undef HF_ATTR_NO_SANITIZE_MEMORY
     68 #define HF_ATTR_NO_SANITIZE_MEMORY __attribute__((no_sanitize("memory")))
     69 #endif /* if __has_feature(memory_sanitizer) */
     70 #endif /* ifdef __has_feature */
     71 
     72 #endif /* ifndef _HF_COMMON_COMMON_H_ */
     73