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#ifndef JEMALLOC_INTERNAL_SAN_BUMP_H
#define JEMALLOC_INTERNAL_SAN_BUMP_H
#include "jemalloc/internal/edata.h"
#include "jemalloc/internal/exp_grow.h"
#include "jemalloc/internal/mutex.h"
#define SBA_RETAINED_ALLOC_SIZE ((size_t)4 << 20)
extern bool opt_retain;
typedef struct ehooks_s ehooks_t;
typedef struct pac_s pac_t;
typedef struct san_bump_alloc_s san_bump_alloc_t;
struct san_bump_alloc_s {
malloc_mutex_t mtx;
edata_t *curr_reg;
};
static inline bool
san_bump_enabled() {
/*
* We enable san_bump allocator only when it's possible to break up a
* mapping and unmap a part of it (maps_coalesce). This is needed to
* ensure the arena destruction process can destroy all retained guarded
* extents one by one and to unmap a trailing part of a retained guarded
* region when it's too small to fit a pending allocation.
* opt_retain is required, because this allocator retains a large
* virtual memory mapping and returns smaller parts of it.
*/
return maps_coalesce && opt_retain;
}
static inline bool
san_bump_alloc_init(san_bump_alloc_t* sba) {
bool err = malloc_mutex_init(&sba->mtx, "sanitizer_bump_allocator",
WITNESS_RANK_SAN_BUMP_ALLOC, malloc_mutex_rank_exclusive);
if (err) {
return true;
}
sba->curr_reg = NULL;
return false;
}
edata_t *
san_bump_alloc(tsdn_t *tsdn, san_bump_alloc_t* sba, pac_t *pac, ehooks_t *ehooks,
size_t size, bool zero);
#endif /* JEMALLOC_INTERNAL_SAN_BUMP_H */
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