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From Jiri Daněk (JIRA) <j...@apache.org>
Subject [jira] [Created] (PROTON-1648) Creating proton::work from proton::void_function0 can lead to segfault; does not compile when mixing C++03 and 11
Date Mon, 23 Oct 2017 11:57:00 GMT
Jiri Daněk created PROTON-1648:
----------------------------------

             Summary: Creating proton::work from proton::void_function0 can lead to segfault;
does not compile when mixing C++03 and 11
                 Key: PROTON-1648
                 URL: https://issues.apache.org/jira/browse/PROTON-1648
             Project: Qpid Proton
          Issue Type: Bug
          Components: cpp-binding
            Reporter: Jiri Daněk
            Assignee: Cliff Jansen


When both proton and the code below is compiled with the same c++ release, it segfaults. If
library is c++11 and the code is c++03, then the following compilation error appears

{noformat}
../proton-c/bindings/cpp/src/container_test.cpp: In member function ‘virtual void {anonymous}::deprecated_schedule_tester::on_container_start(proton::container&)’:
../proton-c/bindings/cpp/src/container_test.cpp:687:44: error: no matching function for call
to ‘proton::internal::v03::work::work({anonymous}::deprecated_schedule_tester::timer_event_t&)’
         proton::work timer_work(timer_event);  // lib: c++11, this file: c++98:: does not
compile; this AFAIC used to work
{noformat}

{code}
struct deprecated_schedule_tester : public proton::messaging_handler {
    int scheduled_work;

    struct timer_event_t : public proton::void_function0 {
        deprecated_schedule_tester &parent;

        timer_event_t(deprecated_schedule_tester &handler) : parent(handler) {}

        void operator()() PN_CPP_OVERRIDE {
            parent.scheduled_work++;
        }
    };

    deprecated_schedule_tester() : scheduled_work(0) {}

    void on_container_start(proton::container& c) PN_CPP_OVERRIDE {
        timer_event_t timer_event(*this);
        proton::work timer_work(timer_event);  // lib: c++11, this file: c++98:: does not
compile; this AFAIC used to work

        proton::duration d1(1 * proton::duration::SECOND.milliseconds());
        proton::duration d2(2 * proton::duration::SECOND.milliseconds());

        c.schedule(d1, timer_work); // works
        c.schedule(d2, timer_event); // if timer_work exists, this segfaults
    }

};

int test_container_schedule_deprecated() {
    deprecated_schedule_tester t;
    proton::container c(t);
    c.run();
       ASSERT_EQUAL(2, t.scheduled_work);
    return 0;
}
{code}

{noformat}
rogram received signal SIGSEGV, Segmentation fault.
0x00007ffff7b65109 in std::__invoke_impl<void, void (proton::void_function0::*&)(),
proton::void_function0*&> (__t=<optimized out>, __f=<optimized out>) at
/nix/store/f8l8z14kniqk8k4k7qbf9pacnjjfsqcv-gcc-7-20170409/include/c++/7.0.1/bits/invoke.h:73
73	      return ((*std::forward<_Tp>(__t)).*__f)(std::forward<_Args>(__args)...);
(gdb) bt
#0  0x00007ffff7b65109 in std::__invoke_impl<void, void (proton::void_function0::*&)(),
proton::void_function0*&> (__t=<optimized out>, __f=<optimized out>) at
/nix/store/f8l8z14kniqk8k4k7qbf9pacnjjfsqcv-gcc-7-20170409/include/c++/7.0.1/bits/invoke.h:73
#1  std::__invoke<void (proton::void_function0::*&)(), proton::void_function0*&>
(__fn=<optimized out>) at /nix/store/f8l8z14kniqk8k4k7qbf9pacnjjfsqcv-gcc-7-20170409/include/c++/7.0.1/bits/invoke.h:95
#2  std::_Bind<void (proton::void_function0::*(proton::void_function0*))()>::__call<void,
, 0ul>(std::tuple<>&&, std::_Index_tuple<0ul>) (__args=<optimized
out>, this=<optimized out>) at /nix/store/f8l8z14kniqk8k4k7qbf9pacnjjfsqcv-gcc-7-20170409/include/c++/7.0.1/functional:461
#3  std::_Bind<void (proton::void_function0::*(proton::void_function0*))()>::operator()<,
void>() (this=<optimized out>) at /nix/store/f8l8z14kniqk8k4k7qbf9pacnjjfsqcv-gcc-7-20170409/include/c++/7.0.1/functional:545
#4  std::_Function_handler<void (), std::_Bind<void (proton::void_function0::*(proton::void_function0*))()>
>::_M_invoke(std::_Any_data const&) (__functor=...) at /nix/store/f8l8z14kniqk8k4k7qbf9pacnjjfsqcv-gcc-7-20170409/include/c++/7.0.1/bits/std_function.h:316
#5  0x00007ffff7b696a1 in std::function<void ()>::operator()() const (this=0x7fffffffcbb0)
at /nix/store/f8l8z14kniqk8k4k7qbf9pacnjjfsqcv-gcc-7-20170409/include/c++/7.0.1/bits/std_function.h:706
#6  proton::internal::v11::work::operator() (this=0x7fffffffcbb0) at /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/include/proton/work_queue.hpp:289
#7  proton::container::impl::run_timer_jobs (this=this@entry=0x61d030) at /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/src/proactor_container_impl.cpp:454
#8  0x00007ffff7b6a385 in proton::container::impl::handle (this=this@entry=0x61d030, event=<optimized
out>) at /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/src/proactor_container_impl.cpp:485
#9  0x00007ffff7b6aab3 in proton::container::impl::thread (this=this@entry=0x61d030) at /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/src/proactor_container_impl.cpp:633
#10 0x00007ffff7b6b1a3 in proton::container::impl::run (this=0x61d030, threads=threads@entry=1)
at /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/src/proactor_container_impl.cpp:675
#11 0x00007ffff7b64229 in proton::container::run (this=this@entry=0x7fffffffcf38) at /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/src/container.cpp:88
#12 0x0000000000403d45 in (anonymous namespace)::test_container_schedule_deprecated () at
/home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/src/container_test.cpp:701
#13 0x00000000004030a2 in main () at /home/jdanek/Work/repos/qpid-proton/proton-c/bindings/cpp/src/container_test.cpp:711
#14 0x00007ffff6a6b560 in __libc_start_main () from /nix/store/zpg78y1mf0di6127q6r51kgx2q8cxsvv-glibc-2.25-49/lib/libc.so.6
#15 0x000000000040342a in _start () at ../sysdeps/x86_64/start.S:120
{noformat}



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