[Boost-bugs] [Boost C++ Libraries] #11158: Pthread thread deadlock when faketime used

Subject: [Boost-bugs] [Boost C++ Libraries] #11158: Pthread thread deadlock when faketime used
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-03-31 07:23:50

#11158: Pthread thread deadlock when faketime used
------------------------------+----------------------
 Reporter:  slobodyanukma@…   |      Owner:  anthonyw
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  thread
  Version:  Boost 1.55.0      |   Severity:  Problem
 Keywords:                    |
------------------------------+----------------------
 Following code deadlocked on pthread_cond_timedwait call if started
 like
 {{{
 LD_PRELOAD=/usr/lib/x86_64-linux-gnu/faketime/libfaketime.so.1
 FAKETIME="+30d" ./a.out
 }}}

 {{{
 #include <boost/thread.hpp>
 #include <iostream>

 using namespace std;

 void f() {
         int n=50;
         while (n--) {
                 cout << n << endl;
                 boost::this_thread::sleep(boost::posix_time::seconds(1));
 //              boost::this_thread::sleep_for( boost::chrono::seconds(1)
 );
 //              sleep(1);
         }
 }

 int main(int argc, char* argv[]) {
         boost::thread th(f);
         th.join();
         return 0;
 }
 }}}

 Here is backtarce:
 {{{
 #0  pthread_cond_timedwait@@GLIBC_2.3.2 () at
 ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
 #1  0x0000000000da8ed3 in
 boost::condition_variable::do_wait_until(boost::unique_lock<boost::mutex>&,
 timespec const&) ()
 #2  0x0000000000da792f in boost::this_thread::hiden::sleep_until(timespec
 const&) ()
 #3  0x0000000000978ff6 in boost::this_thread::sleep (abs_time=...) at
 /home/sl/project/Elephantdrive/devroot/3rdparty/boost/boost/thread/pthread/thread_data.hpp:249
 #4  0x0000000000979065 in
 boost::this_thread::sleep<boost::posix_time::seconds> (rel_time=...) at
 /home/sl/project/Elephantdrive/devroot/3rdparty/boost/boost/thread/pthread/thread_data.hpp:255
 }}}

 But no deadlocks if used sleep(1) instead. I belive it is some
 pthread_cond_timedwait issue but will be good call sleep() or usleep() in
 boost's internals instead in according points if possible.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11158>
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