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// SPDX-License-Identifier: ISC
/*
* Copyright (c) 2015-16 David Lamparter, for NetDEF, Inc.
*/
#include <zebra.h>
#include <stdlib.h>
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#ifdef HAVE_MALLOC_NP_H
#include <malloc_np.h>
#endif
#ifdef HAVE_MALLOC_MALLOC_H
#include <malloc/malloc.h>
#endif
#include "memory.h"
#include "log.h"
#include "libfrr_trace.h"
static struct memgroup *mg_first = NULL;
struct memgroup **mg_insert = &mg_first;
DEFINE_MGROUP(LIB, "libfrr");
DEFINE_MTYPE(LIB, TMP, "Temporary memory");
DEFINE_MTYPE(LIB, BITFIELD, "Bitfield memory");
static inline void mt_count_alloc(struct memtype *mt, size_t size, void *ptr)
{
size_t current;
size_t oldsize;
current = 1 + atomic_fetch_add_explicit(&mt->n_alloc, 1,
memory_order_relaxed);
oldsize = atomic_load_explicit(&mt->n_max, memory_order_relaxed);
if (current > oldsize)
/* note that this may fail, but approximation is sufficient */
atomic_compare_exchange_weak_explicit(&mt->n_max, &oldsize,
current,
memory_order_relaxed,
memory_order_relaxed);
oldsize = atomic_load_explicit(&mt->size, memory_order_relaxed);
if (oldsize == 0)
oldsize = atomic_exchange_explicit(&mt->size, size,
memory_order_relaxed);
if (oldsize != 0 && oldsize != size && oldsize != SIZE_VAR)
atomic_store_explicit(&mt->size, SIZE_VAR,
memory_order_relaxed);
#ifdef HAVE_MALLOC_USABLE_SIZE
size_t mallocsz = malloc_usable_size(ptr);
current = mallocsz + atomic_fetch_add_explicit(&mt->total, mallocsz,
memory_order_relaxed);
oldsize = atomic_load_explicit(&mt->max_size, memory_order_relaxed);
if (current > oldsize)
/* note that this may fail, but approximation is sufficient */
atomic_compare_exchange_weak_explicit(&mt->max_size, &oldsize,
current,
memory_order_relaxed,
memory_order_relaxed);
#endif
}
static inline void mt_count_free(struct memtype *mt, void *ptr)
{
frrtrace(2, frr_libfrr, memfree, mt, ptr);
assert(mt->n_alloc);
atomic_fetch_sub_explicit(&mt->n_alloc, 1, memory_order_relaxed);
#ifdef HAVE_MALLOC_USABLE_SIZE
size_t mallocsz = malloc_usable_size(ptr);
atomic_fetch_sub_explicit(&mt->total, mallocsz, memory_order_relaxed);
#endif
}
static inline void *mt_checkalloc(struct memtype *mt, void *ptr, size_t size)
{
frrtrace(3, frr_libfrr, memalloc, mt, ptr, size);
if (__builtin_expect(ptr == NULL, 0)) {
if (size) {
/* malloc(0) is allowed to return NULL */
memory_oom(size, mt->name);
}
return NULL;
}
mt_count_alloc(mt, size, ptr);
return ptr;
}
void *qmalloc(struct memtype *mt, size_t size)
{
return mt_checkalloc(mt, malloc(size), size);
}
void *qcalloc(struct memtype *mt, size_t size)
{
return mt_checkalloc(mt, calloc(size, 1), size);
}
void *qrealloc(struct memtype *mt, void *ptr, size_t size)
{
if (ptr)
mt_count_free(mt, ptr);
return mt_checkalloc(mt, ptr ? realloc(ptr, size) : malloc(size), size);
}
void *qstrdup(struct memtype *mt, const char *str)
{
return str ? mt_checkalloc(mt, strdup(str), strlen(str) + 1) : NULL;
}
void qcountfree(struct memtype *mt, void *ptr)
{
if (ptr)
mt_count_free(mt, ptr);
}
void qfree(struct memtype *mt, void *ptr)
{
if (ptr)
mt_count_free(mt, ptr);
free(ptr);
}
int qmem_walk(qmem_walk_fn *func, void *arg)
{
struct memgroup *mg;
struct memtype *mt;
int rv;
for (mg = mg_first; mg; mg = mg->next) {
if ((rv = func(arg, mg, NULL)))
return rv;
for (mt = mg->types; mt; mt = mt->next)
if ((rv = func(arg, mg, mt)))
return rv;
}
return 0;
}
struct exit_dump_args {
FILE *fp;
const char *prefix;
int error;
};
static int qmem_exit_walker(void *arg, struct memgroup *mg, struct memtype *mt)
{
struct exit_dump_args *eda = arg;
if (!mt) {
fprintf(eda->fp,
"%s: showing active allocations in memory group %s\n",
eda->prefix, mg->name);
} else if (mt->n_alloc) {
char size[32];
if (!mg->active_at_exit)
eda->error++;
snprintf(size, sizeof(size), "%10zu", mt->size);
fprintf(eda->fp, "%s: memstats: %-30s: %6zu * %s\n",
eda->prefix, mt->name, mt->n_alloc,
mt->size == SIZE_VAR ? "(variably sized)" : size);
}
return 0;
}
int log_memstats(FILE *fp, const char *prefix)
{
struct exit_dump_args eda = {.fp = fp, .prefix = prefix, .error = 0};
qmem_walk(qmem_exit_walker, &eda);
return eda.error;
}
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