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malloc: Add call counters for malloc, free, realloc

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Add counters to track the number of calls to malloc(), free(), and
realloc(). These are displayed by the 'malloc info' command and
accessible via malloc_get_info().

Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
This commit is contained in:
Simon Glass
2025-11-28 09:28:21 -07:00
parent cfbee94582
commit d8b19014d7
5 changed files with 41 additions and 6 deletions
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18
common/dlmalloc.c
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@@ -646,6 +646,12 @@ ulong mem_malloc_start;
ulong mem_malloc_end;
ulong mem_malloc_brk;
#ifndef NO_MALLOC_STATS
static ulong malloc_count;
static ulong free_count;
static ulong realloc_count;
#endif /* !NO_MALLOC_STATS */
#endif /* __UBOOT__ */
#ifndef SMALLCHUNKS_AS_FUNCS
@@ -3699,6 +3705,9 @@ int malloc_get_info(struct malloc_info *info)
info->total_bytes = mem_malloc_end - mem_malloc_start;
info->in_use_bytes = mi.uordblks;
info->malloc_count = malloc_count;
info->free_count = free_count;
info->realloc_count = realloc_count;
return 0;
}
@@ -4926,6 +4935,9 @@ void* dlmalloc_impl(size_t bytes) {
if (!(gd->flags & GD_FLG_FULL_MALLOC_INIT))
return malloc_simple(bytes);
#endif
#if !NO_MALLOC_STATS
malloc_count++;
#endif
/* Return NULL if not initialized yet */
if (!mem_malloc_start && !mem_malloc_end)
@@ -5092,6 +5104,9 @@ void* dlmalloc_impl(size_t bytes) {
STATIC_IF_MCHECK
void dlfree_impl(void* mem) {
#ifdef __UBOOT__
#if !NO_MALLOC_STATS
free_count++;
#endif
#if CONFIG_IS_ENABLED(SYS_MALLOC_F)
/* free() is a no-op - all the memory will be freed on relocation */
if (!(gd->flags & GD_FLG_FULL_MALLOC_INIT)) {
@@ -5662,6 +5677,9 @@ static void internal_inspect_all(mstate m,
STATIC_IF_MCHECK
void* dlrealloc_impl(void* oldmem, size_t bytes) {
#ifdef __UBOOT__
#if !NO_MALLOC_STATS
realloc_count++;
#endif
#if CONFIG_IS_ENABLED(SYS_MALLOC_F)
if (!(gd->flags & GD_FLG_FULL_MALLOC_INIT)) {
/* This is harder to support and should not be needed */