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git.proxmox.com Git - mirror_frr.git/blob - lib/memory.c
2 * Copyright (c) 2015-16 David Lamparter, for NetDEF, Inc.
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 #ifdef HAVE_MALLOC_NP_H
24 #include <malloc_np.h>
26 #ifdef HAVE_MALLOC_MALLOC_H
27 #include <malloc/malloc.h>
33 static struct memgroup
*mg_first
= NULL
;
34 struct memgroup
**mg_insert
= &mg_first
;
36 DEFINE_MGROUP(LIB
, "libfrr")
37 DEFINE_MTYPE(LIB
, TMP
, "Temporary memory")
39 static inline void mt_count_alloc(struct memtype
*mt
, size_t size
, void *ptr
)
44 current
= 1 + atomic_fetch_add_explicit(&mt
->n_alloc
, 1,
45 memory_order_relaxed
);
47 oldsize
= atomic_load_explicit(&mt
->n_max
, memory_order_relaxed
);
48 if (current
> oldsize
)
49 /* note that this may fail, but approximation is sufficient */
50 atomic_compare_exchange_weak_explicit(&mt
->n_max
, &oldsize
,
53 memory_order_relaxed
);
55 oldsize
= atomic_load_explicit(&mt
->size
, memory_order_relaxed
);
57 oldsize
= atomic_exchange_explicit(&mt
->size
, size
,
58 memory_order_relaxed
);
59 if (oldsize
!= 0 && oldsize
!= size
&& oldsize
!= SIZE_VAR
)
60 atomic_store_explicit(&mt
->size
, SIZE_VAR
,
61 memory_order_relaxed
);
63 #ifdef HAVE_MALLOC_USABLE_SIZE
64 size_t mallocsz
= malloc_usable_size(ptr
);
66 current
= mallocsz
+ atomic_fetch_add_explicit(&mt
->total
, mallocsz
,
67 memory_order_relaxed
);
68 oldsize
= atomic_load_explicit(&mt
->max_size
, memory_order_relaxed
);
69 if (current
> oldsize
)
70 /* note that this may fail, but approximation is sufficient */
71 atomic_compare_exchange_weak_explicit(&mt
->max_size
, &oldsize
,
74 memory_order_relaxed
);
78 static inline void mt_count_free(struct memtype
*mt
, void *ptr
)
81 atomic_fetch_sub_explicit(&mt
->n_alloc
, 1, memory_order_relaxed
);
83 #ifdef HAVE_MALLOC_USABLE_SIZE
84 size_t mallocsz
= malloc_usable_size(ptr
);
86 atomic_fetch_sub_explicit(&mt
->total
, mallocsz
, memory_order_relaxed
);
90 static inline void *mt_checkalloc(struct memtype
*mt
, void *ptr
, size_t size
)
92 if (__builtin_expect(ptr
== NULL
, 0)) {
94 /* malloc(0) is allowed to return NULL */
95 memory_oom(size
, mt
->name
);
99 mt_count_alloc(mt
, size
, ptr
);
103 void *qmalloc(struct memtype
*mt
, size_t size
)
105 return mt_checkalloc(mt
, malloc(size
), size
);
108 void *qcalloc(struct memtype
*mt
, size_t size
)
110 return mt_checkalloc(mt
, calloc(size
, 1), size
);
113 void *qrealloc(struct memtype
*mt
, void *ptr
, size_t size
)
116 mt_count_free(mt
, ptr
);
117 return mt_checkalloc(mt
, ptr
? realloc(ptr
, size
) : malloc(size
), size
);
120 void *qstrdup(struct memtype
*mt
, const char *str
)
122 return str
? mt_checkalloc(mt
, strdup(str
), strlen(str
) + 1) : NULL
;
125 void qfree(struct memtype
*mt
, void *ptr
)
128 mt_count_free(mt
, ptr
);
132 int qmem_walk(qmem_walk_fn
*func
, void *arg
)
138 for (mg
= mg_first
; mg
; mg
= mg
->next
) {
139 if ((rv
= func(arg
, mg
, NULL
)))
141 for (mt
= mg
->types
; mt
; mt
= mt
->next
)
142 if ((rv
= func(arg
, mg
, mt
)))
148 struct exit_dump_args
{
154 static int qmem_exit_walker(void *arg
, struct memgroup
*mg
, struct memtype
*mt
)
156 struct exit_dump_args
*eda
= arg
;
160 "%s: showing active allocations in "
162 eda
->prefix
, mg
->name
);
164 } else if (mt
->n_alloc
) {
166 if (!mg
->active_at_exit
)
168 snprintf(size
, sizeof(size
), "%10zu", mt
->size
);
169 fprintf(eda
->fp
, "%s: memstats: %-30s: %6zu * %s\n",
170 eda
->prefix
, mt
->name
, mt
->n_alloc
,
171 mt
->size
== SIZE_VAR
? "(variably sized)" : size
);
176 int log_memstats(FILE *fp
, const char *prefix
)
178 struct exit_dump_args eda
= {.fp
= fp
, .prefix
= prefix
, .error
= 0};
179 qmem_walk(qmem_exit_walker
, &eda
);