16 // use macros to appropriately namespace these.
17 #define size_classes __malloc_size_classes
18 #define ctx __malloc_context
19 #define alloc_meta __malloc_alloc_meta
20 #define is_allzero __malloc_allzerop
21 #define dump_heap __dump_heap
27 #define assert(x) do { if (!(x)) a_crash(); } while(0)
30 #define brk(p) ((uintptr_t)__syscall(SYS_brk, p))
33 #define madvise __madvise
34 #define mremap __mremap
36 #define DISABLE_ALIGNED_ALLOC (__malloc_replaced && !__aligned_alloc_replaced)
38 static inline uint64_t get_random_secret()
40 uint64_t secret = (uintptr_t)&secret * 1103515245;
41 for (size_t i=0; libc.auxv[i]; i+=2)
42 if (libc.auxv[i]==AT_RANDOM)
43 memcpy(&secret, (char *)libc.auxv[i+1]+8, sizeof secret);
48 #define PAGESIZE PAGE_SIZE
51 #define MT (libc.need_locks)
53 #define RDLOCK_IS_EXCLUSIVE 1
55 __attribute__((__visibility__("hidden")))
56 extern int __malloc_lock[1];
58 #define LOCK_OBJ_DEF \
61 static inline void rdlock()
63 if (MT) LOCK(__malloc_lock);
65 static inline void wrlock()
67 if (MT) LOCK(__malloc_lock);
69 static inline void unlock()
71 UNLOCK(__malloc_lock);
73 static inline void upgradelock()