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Merge pull request #1699 from somdoron/master

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problem: when socket is destroyed before zmq_poller is the zmq_poller is accessing a dead socket
This commit is contained in:
Pieter Hintjens 2016-01-13 14:27:22 +01:00
commit b9d831695f
1 changed files with 36 additions and 38 deletions
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74
src/socket_poller.cpp
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@ -34,25 +34,25 @@ zmq::socket_poller_t::socket_poller_t () :
tag (0xCAFEBABE),
need_rebuild (true),
use_signaler (false)
#if defined ZMQ_POLL_BASED_ON_POLL
#if defined ZMQ_POLL_BASED_ON_POLL
,
pollfds (NULL)
#endif
{
{
}
zmq::socket_poller_t::~socket_poller_t ()
{
// Mark the socket_poller as dead
tag = 0xdeadbeef;
tag = 0xdeadbeef;
for (items_t::iterator it = items.begin(); it != items.end(); ++it) {
if (it->socket) {
if (it->socket && it->socket->check_tag()) {
int thread_safe;
size_t thread_safe_size = sizeof(int);
if (it->socket->getsockopt (ZMQ_THREAD_SAFE, &thread_safe, &thread_safe_size) == 0 && thread_safe)
it->socket->remove_signaler (&signaler);
it->socket->remove_signaler (&signaler);
}
}
@ -61,21 +61,21 @@ zmq::socket_poller_t::~socket_poller_t ()
free (pollfds);
pollfds = NULL;
}
#endif
#endif
}
bool zmq::socket_poller_t::check_tag ()
bool zmq::socket_poller_t::check_tag ()
{
return tag == 0xCAFEBABE;
}
int zmq::socket_poller_t::add (socket_base_t *socket_, void* user_data_, short events_)
int zmq::socket_poller_t::add (socket_base_t *socket_, void* user_data_, short events_)
{
for (items_t::iterator it = items.begin (); it != items.end (); ++it) {
if (it->socket == socket_) {
errno = EINVAL;
return -1;
}
}
}
int thread_safe;
@ -88,7 +88,7 @@ int zmq::socket_poller_t::add (socket_base_t *socket_, void* user_data_, short e
if (socket_->add_signaler (&signaler) == -1)
return -1;
}
item_t item = {socket_, 0, user_data_, events_};
items.push_back (item);
need_rebuild = true;
@ -102,7 +102,7 @@ int zmq::socket_poller_t::add_fd (fd_t fd_, void *user_data_, short events_)
if (!it->socket && it->fd == fd_) {
errno = EINVAL;
return -1;
}
}
}
item_t item = {NULL, fd_, user_data_, events_};
@ -146,12 +146,12 @@ int zmq::socket_poller_t::modify_fd (fd_t fd_, short events_)
errno = EINVAL;
return -1;
}
it->events = events_;
need_rebuild = true;
return 0;
}
}
int zmq::socket_poller_t::remove (socket_base_t *socket_)
@ -167,7 +167,7 @@ int zmq::socket_poller_t::remove (socket_base_t *socket_)
errno = EINVAL;
return -1;
}
int thread_safe;
size_t thread_safe_size = sizeof(int);
@ -178,10 +178,10 @@ int zmq::socket_poller_t::remove (socket_base_t *socket_)
if (socket_->remove_signaler (&signaler) == -1)
return -1;
}
items.erase (it);
need_rebuild = true;
need_rebuild = true;
return 0;
}
@ -198,14 +198,14 @@ int zmq::socket_poller_t::remove_fd (fd_t fd_)
errno = EINVAL;
return -1;
}
items.erase (it);
need_rebuild = true;
return 0;
}
int zmq::socket_poller_t::rebuild ()
int zmq::socket_poller_t::rebuild ()
{
#if defined ZMQ_POLL_BASED_ON_POLL
@ -231,16 +231,16 @@ int zmq::socket_poller_t::rebuild ()
if (!use_signaler) {
use_signaler = true;
poll_size++;
}
}
}
else
poll_size++;
}
else
poll_size++;
else
poll_size++;
}
}
if (poll_size == 0)
return 0;
@ -255,7 +255,7 @@ int zmq::socket_poller_t::rebuild ()
pollfds[0].events = POLLIN;
}
for (items_t::iterator it = items.begin (); it != items.end (); ++it) {
for (items_t::iterator it = items.begin (); it != items.end (); ++it) {
if (it->events) {
if (it->socket) {
int thread_safe;
@ -264,12 +264,12 @@ int zmq::socket_poller_t::rebuild ()
if (it->socket->getsockopt (ZMQ_THREAD_SAFE, &thread_safe, &thread_safe_size) == -1)
return -1;
if (!thread_safe) {
if (!thread_safe) {
size_t fd_size = sizeof (zmq::fd_t);
if (it->socket->getsockopt (ZMQ_FD, &pollfds [item_nbr].fd, &fd_size) == -1) {
return -1;
}
pollfds [item_nbr].events = POLLIN;
item_nbr++;
}
@ -281,7 +281,7 @@ int zmq::socket_poller_t::rebuild ()
(it->events & ZMQ_POLLOUT ? POLLOUT : 0) |
(it->events & ZMQ_POLLPRI ? POLLPRI : 0);
it->pollfd_index = item_nbr;
item_nbr++;
item_nbr++;
}
}
}
@ -339,9 +339,9 @@ int zmq::socket_poller_t::rebuild ()
FD_SET (notify_fd, &pollset_in);
if (maxfd < notify_fd)
maxfd = notify_fd;
maxfd = notify_fd;
poll_size++;
poll_size++;
}
}
// Else, the poll item is a raw file descriptor. Convert the poll item
@ -391,7 +391,7 @@ int zmq::socket_poller_t::wait (zmq::socket_poller_t::event_t *event_, long time
zmq::clock_t clock;
uint64_t now = 0;
uint64_t end = 0;
bool first_pass = true;
while (true) {
@ -438,14 +438,14 @@ int zmq::socket_poller_t::wait (zmq::socket_poller_t::event_t *event_, long time
// If there is event to return, we can exit immediately.
return 0;
}
}
}
// Else, the poll item is a raw file descriptor, simply convert
// the events to zmq_pollitem_t-style format.
else {
short revents = pollfds [it->pollfd_index].revents;
short events = 0;
short events = 0;
if (revents & POLLIN)
events |= ZMQ_POLLIN;
if (revents & POLLOUT)
@ -517,7 +517,7 @@ int zmq::socket_poller_t::wait (zmq::socket_poller_t::event_t *event_, long time
uint64_t now = 0;
uint64_t end = 0;
bool first_pass = true;
bool first_pass = true;
fd_set inset, outset, errset;
while (true) {
@ -582,7 +582,7 @@ int zmq::socket_poller_t::wait (zmq::socket_poller_t::event_t *event_, long time
// If there is event to return, we can exit immediately.
return 0;
}
}
}
// Else, the poll item is a raw file descriptor, simply convert
// the events to zmq_pollitem_t-style format.
@ -595,7 +595,7 @@ int zmq::socket_poller_t::wait (zmq::socket_poller_t::event_t *event_, long time
events |= ZMQ_POLLOUT;
if (FD_ISSET (it->fd, &errset))
events |= ZMQ_POLLERR;
if (events) {
event_->socket = NULL;
event_->user_data = it->user_data;
@ -648,5 +648,3 @@ int zmq::socket_poller_t::wait (zmq::socket_poller_t::event_t *event_, long time
return -1;
#endif
}