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#ifndef MALLOC_GLUE_H
#define MALLOC_GLUE_H
#include <stdint.h>
#include <sys/mman.h>
#include <pthread.h>
#include <unistd.h>
#include <elf.h>
#include <string.h>
#include "atomic.h"
#include "syscall.h"
#include "libc.h"
#include "lock.h"
#include "dynlink.h"
// use macros to appropriately namespace these.
#define size_classes __malloc_size_classes
#define ctx __malloc_context
#define alloc_meta __malloc_alloc_meta
#define is_allzero __malloc_allzerop
#define dump_heap __dump_heap
#define malloc __libc_malloc_impl
#define realloc __libc_realloc
#define free __libc_free
#define USE_MADV_FREE 0
#if USE_REAL_ASSERT
#include <assert.h>
#else
#undef assert
#define assert(x) do { if (!(x)) a_crash(); } while(0)
#endif
#define brk(p) ((uintptr_t)__syscall(SYS_brk, p))
#define mmap __mmap
#define madvise __madvise
#define mremap __mremap
#define DISABLE_ALIGNED_ALLOC (__malloc_replaced && !__aligned_alloc_replaced)
static inline uint64_t get_random_secret()
{
uint64_t secret = (uintptr_t)&secret * 1103515245;
for (size_t i=0; libc.auxv[i]; i+=2)
if (libc.auxv[i]==AT_RANDOM)
memcpy(&secret, (char *)libc.auxv[i+1]+8, sizeof secret);
return secret;
}
#ifndef PAGESIZE
#define PAGESIZE PAGE_SIZE
#endif
#define MT (libc.need_locks)
#define RDLOCK_IS_EXCLUSIVE 1
__attribute__((__visibility__("hidden")))
extern int __malloc_lock[1];
#define LOCK_OBJ_DEF \
int __malloc_lock[1]; \
void __malloc_atfork(int who) { malloc_atfork(who); }
static inline void rdlock()
{
if (MT) LOCK(__malloc_lock);
}
static inline void wrlock()
{
if (MT) LOCK(__malloc_lock);
}
static inline void unlock()
{
UNLOCK(__malloc_lock);
}
static inline void upgradelock()
{
}
static inline void resetlock()
{
__malloc_lock[0] = 0;
}
static inline void malloc_atfork(int who)
{
if (who<0) rdlock();
else if (who>0) resetlock();
else unlock();
}
#endif
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