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Add debug messages to diagnose possible ref counting bug

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This commit is contained in:
Jeremy Lakeman 2016-05-02 10:48:36 +09:30
parent 0c0726a2b6
commit d7e1e4046b
3 changed files with 25 additions and 13 deletions
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1
conf_schema.h
View File

@ -268,6 +268,7 @@ ATOM(bool_t, vomp, 0, boolean,, "")
ATOM(bool_t, profiling, 0, boolean,, "")
ATOM(bool_t, linkstate, 0, boolean,, "")
ATOM(bool_t, watchdog, 0, boolean,, "")
ATOM(bool_t, ref_counts, 0, boolean,, "")
END_STRUCT
#define LOG_FORMAT_OPTIONS \

17
overlay_interface.h
View File

@ -101,11 +101,18 @@ typedef struct overlay_interface {
*/
extern overlay_interface overlay_interfaces[OVERLAY_MAX_INTERFACES];
struct network_destination * new_destination(struct overlay_interface *interface);
struct network_destination * create_unicast_destination(struct socket_address *addr, struct overlay_interface *interface);
struct network_destination * add_destination_ref(struct network_destination *ref);
void release_destination_ref(struct network_destination *ref);
int set_destination_ref(struct network_destination **ptr, struct network_destination *ref);
struct network_destination * _new_destination(struct __sourceloc __whence, struct overlay_interface *interface);
struct network_destination * _create_unicast_destination(struct __sourceloc __whence, struct socket_address *addr, struct overlay_interface *interface);
struct network_destination * _add_destination_ref(struct __sourceloc __whence, struct network_destination *ref);
void _release_destination_ref(struct __sourceloc __whence, struct network_destination *ref);
int _set_destination_ref(struct __sourceloc __whence, struct network_destination **ptr, struct network_destination *ref);
#define new_destination(I) _new_destination(__WHENCE__, I)
#define create_unicast_destination(A, I) _create_unicast_destination(__WHENCE__, A, I)
#define add_destination_ref(R) _add_destination_ref(__WHENCE__, R)
#define release_destination_ref(R) _release_destination_ref(__WHENCE__, R)
#define set_destination_ref(P, R) _set_destination_ref(__WHENCE__, P, R)
void overlay_interface_config_change();
struct config_mdp_iftype;

20
route_link.c
View File

@ -174,7 +174,7 @@ struct neighbour *neighbours=NULL;
unsigned neighbour_count=0;
int route_version=0;
struct network_destination * new_destination(struct overlay_interface *interface){
struct network_destination * _new_destination(struct __sourceloc __whence, struct overlay_interface *interface){
assert(interface);
struct network_destination *ret = emalloc_zero(sizeof(struct network_destination));
if (ret){
@ -184,11 +184,12 @@ struct network_destination * new_destination(struct overlay_interface *interface
ret->last_tx = TIME_MS_NEVER_HAS;
ret->sequence_number = -1;
ret->last_ack_seq = -1;
DEBUGF(ref_counts, "Created destination %p refs %u", ret, ret->_ref_count);
}
return ret;
}
struct network_destination * create_unicast_destination(struct socket_address *addr, struct overlay_interface *interface){
struct network_destination * _create_unicast_destination(struct __sourceloc whence, struct socket_address *addr, struct overlay_interface *interface){
if (!interface && addr->addr.sa_family == AF_INET)
interface = overlay_interface_find(addr->inet.sin_addr, 1);
if (!interface){
@ -203,7 +204,7 @@ struct network_destination * create_unicast_destination(struct socket_address *a
return NULL;
if (!interface->ifconfig.unicast.send)
return NULL;
struct network_destination *ret = new_destination(interface);
struct network_destination *ret = _new_destination(whence, interface);
if (ret){
ret->address = *addr;
ret->unicast = 1;
@ -212,26 +213,29 @@ struct network_destination * create_unicast_destination(struct socket_address *a
return ret;
}
struct network_destination * add_destination_ref(struct network_destination *ref){
struct network_destination * _add_destination_ref(struct __sourceloc __whence, struct network_destination *ref){
ref->_ref_count++;
DEBUGF(ref_counts, "Added destination %p refs %u", ref, ref->_ref_count);
return ref;
}
void release_destination_ref(struct network_destination *ref){
void _release_destination_ref(struct __sourceloc __whence, struct network_destination *ref){
if (ref->_ref_count<=1){
DEBUGF(ref_counts, "Released destination %p refs %u", ref, ref->_ref_count);
free(ref);
}else{
ref->_ref_count--;
DEBUGF(ref_counts, "Decremented destination %p refs %u", ref, ref->_ref_count);
}
}
int set_destination_ref(struct network_destination **ptr, struct network_destination *ref){
int _set_destination_ref(struct __sourceloc __whence, struct network_destination **ptr, struct network_destination *ref){
if (ref==*ptr)
return 0;
if (ref)
add_destination_ref(ref);
_add_destination_ref(__whence, ref);
if (*ptr)
release_destination_ref(*ptr);
_release_destination_ref(__whence, *ptr);
*ptr = ref;
return 1;
}