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Merge remote-tracking branch 'public/bug12985_024' into bug12984_025

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This commit is contained in:
Nick Mathewson 2014-08-29 12:24:52 -04:00
commit b0138cd055
4 changed files with 30 additions and 6 deletions
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4
changes/bug12985 Normal file
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@ -0,0 +1,4 @@
o Minor bugfixes (shutdown):
- When shutting down, always call event_del() on lingering read or
write events before freeing them. Fixes bug 12985; bugfix on
0.1.0.2-rc.

14
src/common/compat_libevent.c
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@ -146,13 +146,25 @@ tor_evsignal_new(struct event_base * base, int sig,
{
return tor_event_new(base, sig, EV_SIGNAL|EV_PERSIST, cb, arg);
}
/** Work-alike replacement for event_free() on pre-Libevent-2.0 systems. */
/** Work-alike replacement for event_free() on pre-Libevent-2.0 systems,
* except tolerate tor_event_free(NULL). */
void
tor_event_free(struct event *ev)
{
if (ev == NULL)
return;
event_del(ev);
tor_free(ev);
}
#else
/* Wrapper for event_free() that tolerates tor_event_free(NULL) */
void
tor_event_free(struct event *ev)
{
if (ev == NULL)
return;
event_free(ev);
}
#endif
/** Global event base for use by the main thread. */

5
src/common/compat_libevent.h
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@ -28,11 +28,9 @@ void suppress_libevent_log_msg(const char *msg);
#define tor_event_new event_new
#define tor_evtimer_new evtimer_new
#define tor_evsignal_new evsignal_new
#define tor_event_free event_free
#define tor_evdns_add_server_port(sock, tcp, cb, data) \
evdns_add_server_port_with_base(tor_libevent_get_base(), \
(sock),(tcp),(cb),(data));
#else
struct event *tor_event_new(struct event_base * base, evutil_socket_t sock,
short what, void (*cb)(evutil_socket_t, short, void *), void *arg);
@ -40,10 +38,11 @@ struct event *tor_evtimer_new(struct event_base * base,
void (*cb)(evutil_socket_t, short, void *), void *arg);
struct event *tor_evsignal_new(struct event_base * base, int sig,
void (*cb)(evutil_socket_t, short, void *), void *arg);
void tor_event_free(struct event *ev);
#define tor_evdns_add_server_port evdns_add_server_port
#endif
void tor_event_free(struct event *ev);
typedef struct periodic_timer_t periodic_timer_t;
periodic_timer_t *periodic_timer_new(struct event_base *base,

13
src/or/connection.c
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@ -575,8 +575,17 @@ connection_free_(connection_t *conn)
tor_free(control_conn->incoming_cmd);
}
tor_free(conn->read_event); /* Probably already freed by connection_free. */
tor_free(conn->write_event); /* Probably already freed by connection_free. */
#ifdef TOR_IS_MULTITHREADED
/* Probably already freed by connection_free. */
/* We don't do these frees on the multiprocess case, since in that case we
* don't want to call event_del() postfork or it's likely to mess up.
* Multiprocess builds are deprecated, so let's just have a one-time memory
* leak here.
*/
tor_event_free(conn->read_event);
tor_event_free(conn->write_event);
conn->read_event = conn->write_event = NULL;
#endif
IF_HAS_BUFFEREVENT(conn, {
/* This was a workaround to handle bugs in some old versions of libevent
* where callbacks can occur after calling bufferevent_free(). Setting