adding aligned_alloc + little changes proposal for posix_memalign
MODIFY
libdislocator/libdislocator.so.c
libdislocator/libdislocator.so.c
#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");

adding aligned_alloc + little changes proposal for posix_memalign