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/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
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* Copyright Ā© 2007 Red Hat, Inc.
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of
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* Red Hat, Inc. not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. Red Hat, Inc. makes no representations about the
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* suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
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* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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* Author: Behdad Esfahbod <behdad@behdad.org>
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/* A simple malloc wrapper that prints out statistics on termination */
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struct alloc_stats_t {
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struct alloc_stat_t malloc, realloc, total;
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struct alloc_stats_t stat;
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static struct func_stat_t *func_stats = NULL;
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static int func_stats_num = 0;
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static int func_stats_size = 0;
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alloc_stats_add (struct alloc_stats_t *stats, int is_realloc, size_t size)
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struct alloc_stat_t *stat = is_realloc ? &stats->realloc : &stats->malloc;
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stats->total.size += size;
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resolve_addr (const void *addr) {
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const char *name = NULL;
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if (addr == (void *) -1)
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strings = backtrace_symbols ((void**)&addr, 1);
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name = strdup (strings[0]);
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p = strchr (name, '\t');
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func_stats_add (const void *caller, int is_realloc, size_t size)
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if (caller != (void *) -1 && caller != NULL)
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func_stats_add ((void *) -1, is_realloc, size);
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for (i = 0; i < func_stats_num; i++) {
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if (func_stats[i].addr == caller) {
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alloc_stats_add (&func_stats[i].stat, is_realloc, size);
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if (i == func_stats_size) {
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func_stats_size = func_stats_size ? func_stats_size * 2 : 16;
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func_stats = realloc (func_stats, func_stats_size * sizeof (func_stats[0]));
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name = resolve_addr (caller);
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func_stats[i].addr = caller;
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func_stats[i].name = name;
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memset (&func_stats[i].stat, 0, sizeof (func_stats[i].stat));
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alloc_stats_add (&func_stats[i].stat, is_realloc, size);
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func_stats_add (NULL, is_realloc, size);
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static void *(*old_malloc)(size_t, const void *);
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static void *(*old_realloc)(void *, size_t, const void *);
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static void *my_malloc(size_t, const void *);
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static void *my_realloc(void *, size_t, const void *);
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old_malloc = __malloc_hook;
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old_realloc = __realloc_hook;
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__malloc_hook = old_malloc;
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__realloc_hook = old_realloc;
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/* should always save the current value */
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__malloc_hook = my_malloc;
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__realloc_hook = my_realloc;
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my_malloc(size_t size, const void *caller)
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func_stats_add (caller, 0, size);
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my_realloc(void *ptr, size_t size, const void *caller)
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func_stats_add (caller, 1, size);
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ret = realloc (ptr, size);
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void (*__malloc_initialize_hook) (void) = my_init_hook;
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add_alloc_stats (struct alloc_stats_t *a, struct alloc_stats_t *b)
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a->total.num += b->total.num;
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a->total.size += b->total.size;
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a->malloc.num += b->malloc.num;
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a->malloc.size += b->malloc.size;
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a->realloc.num += b->realloc.num;
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a->realloc.size += b->realloc.size;
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dump_alloc_stats (struct alloc_stats_t *stats, const char *name)
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printf ("%8d %'11ld %8d %'11ld %8d %'11ld %s\n",
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stats->total.num, stats->total.size,
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stats->malloc.num, stats->malloc.size,
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stats->realloc.num, stats->realloc.size,
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compare_func_stats_name (const void *pa, const void *pb)
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const struct func_stat_t *a = pa, *b = pb;
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i = strcmp (a->name, b->name);
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return ((char *) a->addr - (char *) b->addr);
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compare_func_stats (const void *pa, const void *pb)
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const struct func_stat_t *a = pa, *b = pb;
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if (a->stat.total.num != b->stat.total.num)
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return (a->stat.total.num - b->stat.total.num);
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if (a->stat.total.size != b->stat.total.size)
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return (a->stat.total.size - b->stat.total.size);
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return compare_func_stats_name (pa, pb);
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merge_similar_entries (void)
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for (i = 1; i < func_stats_num; i++) {
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if (i != j && 0 == strcmp (func_stats[i].name, func_stats[j].name)) {
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add_alloc_stats (&func_stats[j].stat, &func_stats[i].stat);
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func_stats[j] = func_stats[i];
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if (j < func_stats_num)
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__attribute__ ((destructor))
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/* merge entries with same name */
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qsort (func_stats, func_stats_num, sizeof (func_stats[0]), compare_func_stats_name);
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merge_similar_entries ();
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qsort (func_stats, func_stats_num, sizeof (func_stats[0]), compare_func_stats);
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if (func_stats_num) {
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setlocale (LC_ALL, "");
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printf (" TOTAL MALLOC REALLOC\n");
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printf (" num size num size num size\n");
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for (i = 0; i < func_stats_num; i++) {
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dump_alloc_stats (&func_stats[i].stat, func_stats[i].name);