1 /* 2 * This file contains wrapper functions working with memory allocations, 3 * they just terminate the program in case of memory allocation failure. 4 * These functions can be used by various binaries included in the strace 5 * package. 6 * 7 * Copyright (c) 2001-2017 The strace developers. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef STRACE_XMALLOC_H 34 #define STRACE_XMALLOC_H 35 36 #include <stddef.h> 37 #include "gcc_compat.h" 38 39 #define xcalloc strace_calloc 40 #define xmalloc strace_malloc 41 42 void *xcalloc(size_t nmemb, size_t size) 43 ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE((1, 2)); 44 void *xmalloc(size_t size) ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE((1)); 45 void *xreallocarray(void *ptr, size_t nmemb, size_t size) 46 ATTRIBUTE_ALLOC_SIZE((2, 3)); 47 48 /** 49 * Utility function for the simplification of managing various dynamic arrays. 50 * Knows better how to resize arrays. Dies if there's no enough memory. 51 * 52 * @param[in] ptr Pointer to the array to be resized. If ptr is NULL, 53 * new array is allocated. 54 * @param[in, out] nmemb Pointer to the current member count. If ptr is 55 * NULL, it specifies number of members in the newly 56 * created array. If ptr is NULL and nmemb is 0, 57 * number of members in the new array is decided by 58 * the function. Member count is updated by the 59 * function to the new value. 60 * @param[in] memb_size Size of array member in bytes. 61 * @return Pointer to the (re)allocated array. 62 */ 63 void *xgrowarray(void *ptr, size_t *nmemb, size_t memb_size); 64 65 /* 66 * Note that the following two functions return NULL when NULL is specified 67 * and not when allocation is failed, since, as the "x" prefix implies, 68 * the allocation failure leads to program termination, so we may re-purpose 69 * this return value and simplify the idiom "str ? xstrdup(str) : NULL". 70 */ 71 char *xstrdup(const char *str) ATTRIBUTE_MALLOC; 72 char *xstrndup(const char *str, size_t n) ATTRIBUTE_MALLOC; 73 74 #endif /* !STRACE_XMALLOC_H */ 75
