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memleak: track reallocs and frees in notleak()

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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2017-12-15 20:51:54 +10:30 • committed by Christian Decker
parent 70d01b22e1
commit 7a8532830f
1 changed files with 29 additions and 1 deletions
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30
common/memleak.c
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@ -10,6 +10,33 @@
static struct backtrace_state *backtrace_state; static struct backtrace_state *backtrace_state;
static const void **notleaks; static const void **notleaks;
static size_t find_notleak(const tal_t *ptr)
{
size_t i, nleaks = tal_count(notleaks);
for (i = 0; i < nleaks; i++)
if (notleaks[i] == ptr)
return i;
abort();
}
static void notleak_change(tal_t *ctx,
enum tal_notify_type type,
void *info)
{
size_t i;
if (type == TAL_NOTIFY_FREE) {
i = find_notleak(ctx);
memmove(notleaks + i, notleaks + i + 1,
sizeof(*notleaks) * (tal_count(notleaks) - i - 1));
tal_resize(&notleaks, tal_count(notleaks) - 1);
} else if (type == TAL_NOTIFY_MOVE) {
i = find_notleak(info);
notleaks[i] = ctx;
}
}
void *notleak_(const void *ptr) void *notleak_(const void *ptr)
{ {
size_t nleaks; size_t nleaks;
@ -18,10 +45,11 @@ void *notleak_(const void *ptr)
if (!notleaks) if (!notleaks)
return cast_const(void *, ptr); return cast_const(void *, ptr);
/* FIXME: Doesn't work with reallocs, but tal_steal breaks lifetimes */
nleaks = tal_count(notleaks); nleaks = tal_count(notleaks);
tal_resize(&notleaks, nleaks+1); tal_resize(&notleaks, nleaks+1);
notleaks[nleaks] = ptr; notleaks[nleaks] = ptr;
tal_add_notifier(ptr, TAL_NOTIFY_FREE|TAL_NOTIFY_MOVE, notleak_change);
return cast_const(void *, ptr); return cast_const(void *, ptr);
} }