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[util/malloc-stats] Do a single backtrace_symbols() call

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I was hoping that this may speed things up, but it didn't.  :(
This commit is contained in:
Behdad Esfahbod 2009-01-31 22:10:57 -05:00
parent 64d1c75870
commit d63c1ab3ff
1 changed files with 50 additions and 8 deletions
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58
util/malloc-stats.c
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@ -135,6 +135,40 @@ resolve_addr (const void *addr) {
return name;
}
static void
resolve_addrs (struct func_stat_t *func_stats, int num)
{
int i;
void **addrs;
char **strings;
addrs = malloc (num * sizeof (void *));
for (i = 0; i < num; i++)
addrs[i] = (void *) func_stats[i].addr;
strings = backtrace_symbols (addrs, num);
for (i = 0; i < num; i++) {
char *p;
char *name;
int len;
p = strchr (strings[i], '\t');
if (p)
p++;
else
p = strings[i];
len = strlen (p) + 1;
name = _perm_alloc (len);
memcpy (name, p, len);
func_stats[i].name = name;
}
free (strings);
free (addrs);
}
static void
func_stats_add (const void *caller, int is_realloc, size_t size)
{
@ -156,7 +190,7 @@ func_stats_add (const void *caller, int is_realloc, size_t size)
elt->next = func_stats[i];
func_stats[i] = elt;
elt->addr = caller;
elt->name = resolve_addr (caller);
elt->name = NULL;
memset (&elt->stat, 0, sizeof (struct alloc_stats_t));
}
@ -323,24 +357,30 @@ malloc_stats (void)
if (sorted_func_stats == NULL)
return;
sorted_func_stats[0].next = NULL;
sorted_func_stats[0].addr = (void *) -1;
sorted_func_stats[0].name = "(total)";
sorted_func_stats[0].stat = total_allocations;
for (i = j = 0; i < ARRAY_SIZE (func_stats); i++) {
j = 0;
for (i = 0; i < ARRAY_SIZE (func_stats); i++) {
struct func_stat_t *elt;
for (elt = func_stats[i]; elt != NULL; elt = elt->next)
sorted_func_stats[++j] = *elt;
sorted_func_stats[j++] = *elt;
}
resolve_addrs (sorted_func_stats, j);
/* merge entries with same name */
qsort (sorted_func_stats, j,
sizeof (struct func_stat_t), compare_func_stats_name);
j = merge_similar_entries (sorted_func_stats, j);
qsort (sorted_func_stats, j,
sizeof (struct func_stat_t), compare_func_stats);
/* add total */
sorted_func_stats[j].next = NULL;
sorted_func_stats[j].addr = (void *) -1;
sorted_func_stats[j].name = "(total)";
sorted_func_stats[j].stat = total_allocations;
j++;
setlocale (LC_ALL, "");
printf (" TOTAL MALLOC REALLOC\n");
@ -351,5 +391,7 @@ malloc_stats (void)
sorted_func_stats[i].name);
}
/* XXX free other stuff? */
free (sorted_func_stats);
}