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[malloc-stats] Fix to not crash

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Can't use constructor as malloc might be called before that.
This commit is contained in:
Behdad Esfahbod 2022-12-29 19:54:51 -07:00
parent 4913f07950
commit 71c4443139
1 changed files with 9 additions and 1 deletions
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10
util/malloc-stats.c
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@ -176,9 +176,14 @@ static void *(*old_malloc)(size_t);
static void *(*old_realloc)(void *, size_t);
static int enable_hook = 0;
static void init(void);
void *
malloc(size_t size)
{
if (!old_malloc)
init ();
if (enable_hook) {
enable_hook = 0;
void *caller = __builtin_return_address(0);
@ -192,6 +197,9 @@ malloc(size_t size)
void *
realloc(void *ptr, size_t size)
{
if (!old_malloc)
init ();
if (enable_hook) {
enable_hook = 0;
void *caller = __builtin_return_address(0);
@ -202,7 +210,7 @@ realloc(void *ptr, size_t size)
return old_realloc (ptr, size);
}
static void __attribute__ ((constructor))
static void
init(void)
{
old_malloc = dlsym(RTLD_NEXT, "malloc");