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adding aligned_alloc + little changes proposal for posix_memalign

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This commit is contained in:
David Carlier 2019-10-29 08:09:43 +00:00
parent 6238df88a2
commit 87b599f4a8
1 changed files with 20 additions and 1 deletions
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21
libdislocator/libdislocator.so.c
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@ -23,6 +23,7 @@
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <errno.h>
#include <sys/mman.h>
#include "config.h"
@ -272,7 +273,11 @@ int posix_memalign(void** ptr, size_t align, size_t len) {
if ((char*)ptr == NULL || *ptr == NULL)
return -1; // why would we do: FATAL("null pointer on posix_memalign()");
if ((align % 2) || (align % sizeof(void *)))
return -1; // why would we do: FATAL("bad alignment on posix_memalign()");
return EINVAL; // why would we do: FATAL("bad alignment on posix_memalign()");
if (len == 0) {
*ptr = NULL;
return 0;
}
if (align >= 4 * sizeof(size_t)) len += align -1;
*ptr = malloc(len);
@ -294,6 +299,20 @@ void *memalign(size_t align, size_t len) {
return ret;
}
/* sort of C11 alias of memalign only more severe, alignment-wise */
void *aligned_alloc(size_t align, size_t len) {
void *ret = NULL;
if ((len % align)) return NULL;
if (posix_memalign(&ret, align, len)) {
DEBUGF("aligned_alloc(%zu, %zu) failed", align, len);
}
return ret;
}
__attribute__((constructor)) void __dislocator_init(void) {
u8* tmp = getenv("AFL_LD_LIMIT_MB");