lib/ecoli_malloc.h

   1 /*
   2  * Copyright (c) 2016, Olivier MATZ <zer0@droids-corp.org>
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  *     * Redistributions of source code must retain the above copyright
   8  *       notice, this list of conditions and the following disclaimer.
   9  *     * Redistributions in binary form must reproduce the above copyright
  10  *       notice, this list of conditions and the following disclaimer in the
  11  *       documentation and/or other materials provided with the distribution.
  12  *     * Neither the name of the University of California, Berkeley nor the
  13  *       names of its contributors may be used to endorse or promote products
  14  *       derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
  17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  18  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19  * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
  20  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  23  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  25  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #ifndef ECOLI_MALLOC_
  29 #define ECOLI_MALLOC_
  30
  31 #include <sys/types.h>
  32
  33 typedef void *(*ec_malloc_t)(size_t size, const char *file, unsigned int line);
  34 typedef void (*ec_free_t)(void *ptr, const char *file, unsigned int line);
  35 typedef void *(*ec_realloc_t)(void *ptr, size_t size, const char *file,
  36         unsigned int line);
  37
  38 struct ec_malloc_handler {
  39         ec_malloc_t malloc;
  40         ec_free_t free;
  41         ec_realloc_t realloc;
  42 };
  43
  44 extern struct ec_malloc_handler ec_malloc_handler;
  45
  46 int ec_malloc_register(ec_malloc_t usr_malloc, ec_free_t usr_free,
  47         ec_realloc_t usr_realloc);
  48 void ec_malloc_unregister(void);
  49
  50 /* internal */
  51 void *__ec_malloc(size_t size, const char *file, unsigned int line);
  52 void __ec_free(void *ptr, const char *file, unsigned int line);
  53 void *__ec_calloc(size_t nmemb, size_t size, const char *file,
  54         unsigned int line);
  55 void *__ec_realloc(void *ptr, size_t size, const char *file, unsigned int line);
  56 char *__ec_strdup(const char *s, const char *file, unsigned int line);
  57 char *__ec_strndup(const char *s, size_t n, const char *file,
  58         unsigned int line);
  59
  60 /* we use macros here to ensure the file/line stay correct when
  61  * debugging the standard malloc with valgrind */
  62
  63 #define ec_malloc(sz) ({                                                \
  64         void *ret_;                                                     \
  65         if (ec_malloc_handler.malloc == NULL)                           \
  66                 ret_ = malloc(sz);                                      \
  67         else                                                            \
  68                 ret_ = __ec_malloc(sz, __FILE__, __LINE__);             \
  69         ret_;                                                           \
  70         })
  71
  72 #define ec_free(ptr) ({                                                 \
  73         if (ec_malloc_handler.free == NULL)                             \
  74                 free(ptr);                                              \
  75         else                                                            \
  76                 __ec_free(ptr, __FILE__, __LINE__);                     \
  77         })
  78
  79 #define ec_realloc(ptr, sz) ({                                          \
  80         void *ret_;                                                     \
  81         if (ec_malloc_handler.realloc == NULL)                          \
  82                 ret_ = realloc(ptr, sz);                                \
  83         else                                                            \
  84                 ret_ = __ec_realloc(ptr, sz, __FILE__, __LINE__);       \
  85         ret_;                                                           \
  86         })
  87
  88 #define ec_calloc(n, sz) ({                                             \
  89         void *ret_;                                                     \
  90         if (ec_malloc_handler.malloc == NULL)                           \
  91                 ret_ = calloc(n, sz);                                   \
  92         else                                                            \
  93                 ret_ = __ec_calloc(n, sz, __FILE__, __LINE__);          \
  94         ret_;                                                           \
  95         })
  96
  97 #define ec_strdup(s) ({                                                 \
  98         void *ret_;                                                     \
  99         if (ec_malloc_handler.malloc == NULL)                           \
 100                 ret_ = strdup(s);                                       \
 101         else                                                            \
 102                 ret_ = __ec_strdup(s, __FILE__, __LINE__);              \
 103         ret_;                                                           \
 104         })
 105
 106 #define ec_strndup(s, n) ({                                             \
 107         void *ret_;                                                     \
 108         if (ec_malloc_handler.malloc == NULL)                           \
 109                 ret_ = strndup(s, n);                                   \
 110         else                                                            \
 111                 ret_ = __ec_strndup(s, n, __FILE__, __LINE__);          \
 112         ret_;                                                           \
 113         })
 114
 115
 116 #endif