1 /* 2 Copyright 2020 Northern.tech AS 3 4 This file is part of CFEngine 3 - written and maintained by Northern.tech AS. 5 6 This program is free software; you can redistribute it and/or modify it 7 under the terms of the GNU General Public License as published by the 8 Free Software Foundation; version 3. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, write to the Free Software 17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 18 19 To the extent this program is licensed as part of the Enterprise 20 versions of CFEngine, the applicable Commercial Open Source License 21 (COSL) may apply to this file if you as a licensee so wish it. See 22 included file COSL.txt. 23 */ 24 25 #ifndef CFENGINE_ALLOC_H 26 #define CFENGINE_ALLOC_H 27 28 #include <stdlib.h> // size_t 29 #include <stdarg.h> // va_list 30 31 #include <compiler.h> 32 33 void *xcalloc(size_t nmemb, size_t size); 34 void *xmalloc(size_t size); 35 void *xrealloc(void *ptr, size_t size); 36 char *xstrdup(const char *str); 37 char *xstrndup(const char *str, size_t n); 38 void *xmemdup(const void *mem, size_t size); 39 int xasprintf(char **strp, const char *fmt, ...) FUNC_ATTR_PRINTF(2, 3); 40 int xvasprintf(char **strp, const char *fmt, va_list ap) FUNC_ATTR_PRINTF(2, 0); 41 42 #define DESTROY_AND_NULL(destroy, ptr) { destroy(ptr); ptr = NULL; } 43 #define FREE_AND_NULL(ptr) { DESTROY_AND_NULL(free, ptr); } 44 45 /* 46 * Prevent any code from using un-wrapped allocators. 47 * 48 * Use x* equivalents instead. 49 */ 50 51 /** 52 * Currently regular malloc() calls are allowed for mission-critical code that 53 * can somehow recover, like cf-serverd dropping connections or cf-execd 54 * postponing its scheduled actions. 55 * 56 * @note for 99% of the cases (libpromises, cf-agent etc) use xmalloc() and 57 * friends. 58 **/ 59 #if 0 60 61 # undef malloc 62 # undef calloc 63 # undef realloc 64 # undef strdup 65 # undef strndup 66 # undef memdup 67 # undef asprintf 68 # undef vasprintf 69 # define malloc __error_unchecked_malloc 70 # define calloc __error_unchecked_calloc 71 # define realloc __error_unchecked_realloc 72 # define strdup __error_unchecked_strdup 73 # define strndup __error_unchecked_strndup 74 # define memdup __error_unchecked_memdup 75 # define asprintf __error_unchecked_asprintf 76 # define vasprintf __error_unchecked_vasprintf 77 78 void __error_unchecked_malloc(void); 79 void __error_unchecked_calloc(void); 80 void __error_unchecked_realloc(void); 81 void __error_unchecked_strdup(void); 82 void __error_unchecked_strndup(void); 83 void __error_unchecked_memdup(void); 84 void __error_unchecked_asprintf(void); 85 void __error_unchecked_vasprintf(void); 86 87 #endif 88 89 #endif 90