generic-library/libzmq
1
0
Fork 0
mirror of https://github.com/zeromq/libzmq.git synced 2025-11-10 08:08:33 +01:00
Code Issues Projects Releases Wiki Activity

Fixed issue LIBZMQ-345 - race condition in ctx.socket/term allows segfault

Browse Source
This commit is contained in:
Pieter Hintjens
2012-03-22 11:03:32 -05:00
parent 3b483a8dd7
commit 75809b27da
2 changed files with 4 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
src/ctx.cpp
View File

@@ -84,11 +84,11 @@ zmq::ctx_t::~ctx_t ()
int zmq::ctx_t::terminate ()
{
slot_sync.lock ();
if (!starting) {
// Check whether termination was already underway, but interrupted and now
// restarted.
slot_sync.lock ();
bool restarted = terminating;
terminating = true;
slot_sync.unlock ();
@@ -116,8 +116,8 @@ int zmq::ctx_t::terminate ()
zmq_assert (cmd.type == command_t::done);
slot_sync.lock ();
zmq_assert (sockets.empty ());
slot_sync.unlock ();
}
slot_sync.unlock ();
// Deallocate the resources.
delete this;
@@ -163,10 +163,10 @@ int zmq::ctx_t::get (int option_)
zmq::socket_base_t *zmq::ctx_t::create_socket (int type_)
{
slot_sync.lock ();
if (unlikely (starting)) {
starting = false;
// Initialise the array of mailboxes. Additional three slots are for
// zmq_term thread and reaper thread.
opt_sync.lock ();
@@ -203,8 +203,6 @@ zmq::socket_base_t *zmq::ctx_t::create_socket (int type_)
}
}
slot_sync.lock ();
// Once zmq_term() was called, we can't create new sockets.
if (terminating) {
slot_sync.unlock ();
@@ -237,7 +235,6 @@ zmq::socket_base_t *zmq::ctx_t::create_socket (int type_)
slots [slot] = s->get_mailbox ();
slot_sync.unlock ();
return s;
}

2
src/ctx.hpp
View File

@@ -126,7 +126,7 @@ namespace zmq
// Synchronisation of accesses to global slot-related data:
// sockets, empty_slots, terminating. It also synchronises
// access to zombie sockets as such (as oposed to slots) and provides
// access to zombie sockets as such (as opposed to slots) and provides
// a memory barrier to ensure that all CPU cores see the same data.
mutex_t slot_sync;