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
7 * Copyright (c) 2001-2017 The strace developers.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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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.
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.
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33 #ifndef STRACE_XMALLOC_H
34 #define STRACE_XMALLOC_H
37 #include "gcc_compat.h"
39 void *xcalloc(size_t nmemb, size_t size)
40 ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE((1, 2));
41 void *xmalloc(size_t size) ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE((1));
42 void *xreallocarray(void *ptr, size_t nmemb, size_t size)
43 ATTRIBUTE_ALLOC_SIZE((2, 3));
46 * Utility function for the simplification of managing various dynamic arrays.
47 * Knows better how to resize arrays. Dies if there's no enough memory.
49 * @param[in] ptr Pointer to the array to be resized. If ptr is NULL,
50 * new array is allocated.
51 * @param[in, out] nmemb Pointer to the current member count. If ptr is
52 * NULL, it specifies number of members in the newly
53 * created array. If ptr is NULL and nmemb is 0,
54 * number of members in the new array is decided by
55 * the function. Member count is updated by the
56 * function to the new value.
57 * @param[in] memb_size Size of array member in bytes.
58 * @return Pointer to the (re)allocated array.
60 void *xgrowarray(void *ptr, size_t *nmemb, size_t memb_size);
63 * Note that the following two functions return NULL when NULL is specified
64 * and not when allocation is failed, since, as the "x" prefix implies,
65 * the allocation failure leads to program termination, so we may re-purpose
66 * this return value and simplify the idiom "str ? xstrdup(str) : NULL".
68 char *xstrdup(const char *str) ATTRIBUTE_MALLOC;
69 char *xstrndup(const char *str, size_t n) ATTRIBUTE_MALLOC;
71 #endif /* !STRACE_XMALLOC_H */