[Boost-bugs] [Boost C++ Libraries] #12659: Deadlocked with boost::interprocess::managed_mapped_file find

Subject: [Boost-bugs] [Boost C++ Libraries] #12659: Deadlocked with boost::interprocess::managed_mapped_file find
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-12-08 10:16:11

#12659: Deadlocked with boost::interprocess::managed_mapped_file find
-----------------------------+------------------------------
 Reporter:  soumyadutta13@…  |       Type:  Bugs
   Status:  new              |  Milestone:  To Be Determined
Component:  None             |    Version:  Boost 1.61.0
 Severity:  Problem          |   Keywords:
-----------------------------+------------------------------
 Scenario : I have a existing file which at first is opened & loaded using
 {{{
 m_file.reset(new
 boost::interprocess::managed_mapped_file(boost::interprocess::open_or_create,
 file_name.c_str(), m_size));
 }}}

 then I am using find member function
 {{{
 Type *vect = m_file->find<Type>(key).first;
 }}}

 Here my code halts(deadlock).
 {{{
 boost::interprocess::ipcdetail::posix_recursive_mutex::lock
 (this=0x7ffff572d070)
     at
 /home/dev/build/third_party/64-rhel5/boost_1_59_0/include/boost/interprocess/sync/posix/recursive_mutex.hpp:90
 90         if (pthread_mutex_lock(&m_mut) != 0)
 (gdb) p m_mut
 $1 = {__data = {__lock = 2, __count = 1, __owner = **16792**, __nusers =
 1, __kind = 129, __spins = 0, __list = {__prev = 0x0, __next = 0x0}},
   __size =
 "\002\000\000\000\001\000\000\000\230A\000\000\001\000\000\000\201",
 '\000' <repeats 22 times>, __align = 4294967298}
 (gdb) info threads all
   4 Thread 0x7ffff6af0700 (LWP 23305)  0x00000038dceac6aa in times () from
 /lib64/libc.so.6
   3 Thread 0x7ffff75dd700 (LWP 23304)  0x00000038dd20b68c in
 pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
   2 Thread 0x7ffff7fde700 (LWP 23303)  0x00000038dd20eca3 in recvfrom ()
 from /lib64/libpthread.so.0
 * 1 Thread 0x7ffff7fe27e0 (LWP 23300)
 boost::interprocess::ipcdetail::posix_recursive_mutex::lock
 (this=0x7ffff572d070)
     at
 /home/dev/build/third_party/64-rhel5/boost_1_59_0/include/boost/interprocess/sync/posix/recursive_mutex.hpp:90
 }}}

 If you see here onwer is 16792, but I don't see any such thread.

 Some more info.
 {{{
  p *mp_header
 .....
 static PayloadPerAllocation = <optimized out>, m_header =
 {<boost::interprocess::interprocess_recursive_mutex> = {mutex = {m_mut = {
           __data = {__lock = 2, __count = 1, __owner = 16792, __nusers =
 1, __kind = 129, __spins = 0, __list = {__prev = 0x0, __next = 0x0}},
           __size =
 "\002\000\000\000\001\000\000\000\230A\000\000\001\000\000\000\201",
 '\000' <repeats 22 times>, __align = 4294967298}}},
     m_named_index = .....
 }}}

 previous mutex informations are still stored.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/12659>
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