"Fossies" - the Fresh Open Source Software Archive

Member "libzip-1.5.2/regress/malloc.c" (12 Mar 2019, 3975 Bytes) of package /linux/misc/libzip-1.5.2.tar.xz:


As a special service "Fossies" has tried to format the requested source page into HTML format using (guessed) C and C++ source code syntax highlighting (style: standard) with prefixed line numbers and code folding option. Alternatively you can here view or download the uninterpreted source code file. For more information about "malloc.c" see the Fossies "Dox" file reference documentation and the latest Fossies "Diffs" side-by-side code changes report: 1.5.1_vs_1.5.2.

    1 /*
    2   malloc.c -- override *alloc() to allow testing special cases
    3   Copyright (C) 2015-2018 Dieter Baron and Thomas Klausner
    4 
    5   This file is part of ckmame, a program to check rom sets for MAME.
    6   The authors can be contacted at <ckmame@nih.at>
    7 
    8   Redistribution and use in source and binary forms, with or without
    9   modification, are permitted provided that the following conditions
   10   are met:
   11   1. Redistributions of source code must retain the above copyright
   12      notice, this list of conditions and the following disclaimer.
   13   2. Redistributions in binary form must reproduce the above copyright
   14      notice, this list of conditions and the following disclaimer in
   15      the documentation and/or other materials provided with the
   16      distribution.
   17   3. The name of the author may not be used to endorse or promote
   18      products derived from this software without specific prior
   19      written permission.
   20 
   21   THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
   22   OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   23   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24   ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
   25   DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
   27   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   28   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
   29   IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   30   OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
   31   IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32 */
   33 
   34 #include <stdio.h>
   35 #include <stdlib.h>
   36 /* #include <string.h> */
   37 #include <errno.h>
   38 #define __USE_GNU
   39 #include <dlfcn.h>
   40 #undef __USE_GNU
   41 
   42 #include "config.h"
   43 
   44 #if !defined(RTLD_NEXT)
   45 #define RTLD_NEXT RTLD_DEFAULT
   46 #endif
   47 
   48 #if defined(HAVE___PROGNAME)
   49 extern char *__progname;
   50 #endif
   51 
   52 #if defined(HAVE_GETPROGNAME)
   53 /* all fine */
   54 #else
   55 const char *
   56 getprogname(void) {
   57 #if defined(HAVE___PROGNAME)
   58     return __progname;
   59 #else
   60     return NULL;
   61 #endif
   62 }
   63 #endif
   64 
   65 static int inited = 0;
   66 static size_t count = 0;
   67 static size_t max_count = 0;
   68 static size_t min_size = 0;
   69 static void *(*real_malloc)(size_t size) = NULL;
   70 static void *(*real_calloc)(size_t number, size_t size) = NULL;
   71 static void *(*real_realloc)(void *ptr, size_t size) = NULL;
   72 
   73 static const char *myname = NULL;
   74 
   75 /* TODO: add sentinel -- check if particular size is malloced before doing other stuff */
   76 /* TODO: catch free for sentinel too */
   77 /* TODO: optionally, catch malloc of particular size */
   78 
   79 static void
   80 init(void) {
   81     char *foo;
   82     myname = getprogname();
   83     if (!myname)
   84     myname = "(unknown)";
   85     if ((foo = getenv("MALLOC_MAX_COUNT")) != NULL)
   86     max_count = strtoul(foo, NULL, 0);
   87     if ((foo = getenv("MALLOC_MIN_SIZE")) != NULL)
   88     min_size = strtoul(foo, NULL, 0);
   89     real_calloc = dlsym(RTLD_NEXT, "calloc");
   90     if (!real_calloc)
   91     abort();
   92     real_malloc = dlsym(RTLD_NEXT, "malloc");
   93     if (!real_malloc)
   94     abort();
   95     real_realloc = dlsym(RTLD_NEXT, "realloc");
   96     if (!real_realloc)
   97     abort();
   98     inited = 1;
   99 }
  100 
  101 void *
  102 calloc(size_t number, size_t size) {
  103     void *ret;
  104 
  105     if (!inited) {
  106     init();
  107     }
  108 
  109     if (number >= min_size / size && count >= max_count) {
  110     errno = ENOMEM;
  111     return NULL;
  112     }
  113 
  114     ret = real_calloc(number, size);
  115     if (size >= min_size) {
  116     count++;
  117     }
  118 
  119     return ret;
  120 }
  121 
  122 void *
  123 malloc(size_t size) {
  124     void *ret;
  125 
  126     if (!inited) {
  127     init();
  128     }
  129 
  130     if (size >= min_size && count >= max_count) {
  131     errno = ENOMEM;
  132     return NULL;
  133     }
  134 
  135     ret = real_malloc(size);
  136     if (size >= min_size) {
  137     count++;
  138     }
  139 
  140     return ret;
  141 }
  142 
  143 void *
  144 realloc(void *ptr, size_t size) {
  145     void *ret;
  146 
  147     if (!inited) {
  148     init();
  149     }
  150 
  151     if (size >= min_size && count >= max_count) {
  152     errno = ENOMEM;
  153     return NULL;
  154     }
  155 
  156     ret = real_realloc(ptr, size);
  157     if (size >= min_size) {
  158     count++;
  159     }
  160 
  161     return ret;
  162 }