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26c9dd3715
Instead of GNU builtins and extensions, these macros can be implemented with C11's _Generic(3), and the result is much simpler (and safer, since it's now an error, not just a warning). Signed-off-by: Alejandro Colomar <alx@kernel.org>
102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
// SPDX-FileCopyrightText: 2023-2024, Alejandro Colomar <alx@kernel.org>
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// SPDX-License-Identifier: BSD-3-Clause
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#ifndef SHADOW_INCLUDE_LIB_MALLOC_H_
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#define SHADOW_INCLUDE_LIB_MALLOC_H_
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#include <config.h>
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#include <assert.h>
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#include <errno.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include "attr.h"
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#include "defines.h"
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#define CALLOC(n, type) ((type *) calloc(n, sizeof(type)))
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#define XCALLOC(n, type) ((type *) xcalloc(n, sizeof(type)))
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#define MALLOC(n, type) ((type *) mallocarray(n, sizeof(type)))
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#define XMALLOC(n, type) ((type *) xmallocarray(n, sizeof(type)))
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#define REALLOC(ptr, n, type) \
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( \
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_Generic(ptr, type *: (type *) reallocarray(ptr, n, sizeof(type))) \
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)
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#define REALLOCF(ptr, n, type) \
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( \
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_Generic(ptr, type *: (type *) reallocarrayf(ptr, n, sizeof(type))) \
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)
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#define XREALLOC(ptr, n, type) \
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( \
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_Generic(ptr, type *: (type *) xreallocarray(ptr, n, sizeof(type))) \
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)
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ATTR_MALLOC(free)
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inline void *xmalloc(size_t size);
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ATTR_MALLOC(free)
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inline void *xmallocarray(size_t nmemb, size_t size);
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ATTR_MALLOC(free)
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inline void *mallocarray(size_t nmemb, size_t size);
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ATTR_MALLOC(free)
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inline void *reallocarrayf(void *p, size_t nmemb, size_t size);
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ATTR_MALLOC(free)
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inline char *xstrdup(const char *str);
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ATTR_MALLOC(free)
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void *xcalloc(size_t nmemb, size_t size);
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ATTR_MALLOC(free)
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void *xreallocarray(void *p, size_t nmemb, size_t size);
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inline void *
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xmalloc(size_t size)
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{
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return xmallocarray(1, size);
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}
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inline void *
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xmallocarray(size_t nmemb, size_t size)
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{
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return xreallocarray(NULL, nmemb, size);
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}
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inline void *
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mallocarray(size_t nmemb, size_t size)
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{
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return reallocarray(NULL, nmemb, size);
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}
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inline void *
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reallocarrayf(void *p, size_t nmemb, size_t size)
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{
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void *q;
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q = reallocarray(p, nmemb, size);
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/* realloc(p, 0) is equivalent to free(p); avoid double free. */
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if (q == NULL && nmemb != 0 && size != 0)
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free(p);
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return q;
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}
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inline char *
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xstrdup(const char *str)
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{
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return strcpy(XMALLOC(strlen(str) + 1, char), str);
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}
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#endif // include guard
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