I think I found a memory leak.
It appears memory for handles is not being freed after the
nua_handle_destroy().
The su_block_t sub_ref = 1.
So there appears to be one extra reference which is not being unreferenced.
I've been adding trace code and think I understand what may be going on
here.
Each nua_xxx... function gets a reference in nua_signal().
This reference is freed at the end of nua_stack_signal().
When an event is received for a handle from the network,
nua_stack_event() gets a reference.
This reference is freed after the nua callback is called in nua_event().
Other references a obtained for dialog usage as well.
The only reference I could not find a corresponding un-reference call
for is in nua_stack_signal() at the very beginning:
if (nh) {
if (!nh->nh_prev)
nh_append(nua, nh);
if (!nh->nh_ref_by_stack) {
nh->nh_ref_by_stack = 1;
nua_handle_ref(nh);
}
}
I think the nua_handle_ref() call is extraneous here. Handles created by
the stack in nh_create() do not get a reference.
Handles created by the stack, seem to have the same problem in nua_event():
if (nh && !NH_IS_DEFAULT(nh)) {
if (!nh->nh_ref_by_user && nh->nh_valid) {
nh->nh_ref_by_user = 1;
nua_handle_ref(nh);
}
}
I don't see any place where this reference is ever unreferenced.
Also, incoming INVITEs that get canceled seem to create handles which
get the first reference in nua_dialog_usage_add(), but never calls
nua_dialog_usage_remove().
I also see this, if the application calls nua_handle_destroy() in the
callback for events nua_r_bye or nua_r_cancel.
Colin..
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