LTTng

Building lttng-tools with ASan, I see this when launching lttng-sessiond and killing it immediately:

Direct leak of 104 byte(s) in 1 object(s) allocated from:
    #0 0x7f93866e0cd1 in __interceptor_calloc /usr/src/debug/gcc/gcc/libsanitizer/asan/asan_malloc_linux.cpp:77
    #1 0x55c55a7c4963 in zmalloc_internal /home/simark/src/lttng-tools/src/common/macros.hpp:60
    #2 0x55c55a7c4973 in lttng_pipe* zmalloc<lttng_pipe>() /home/simark/src/lttng-tools/src/common/macros.hpp:88
    #3 0x55c55a7c26eb in _pipe_create /home/simark/src/lttng-tools/src/common/pipe.cpp:111
    #4 0x55c55a7c351d in lttng_pipe_open(int) /home/simark/src/lttng-tools/src/common/pipe.cpp:185
    #5 0x55c55a586dd6 in operator() /home/simark/src/lttng-tools/src/bin/lttng-sessiond/rotation-thread.cpp:403
    #6 0x55c55a58744a in lttng::sessiond::rotation_thread::rotation_thread(lttng::sessiond::rotation_thread_timer_queue&, notification_thread_handle&) /home/simark/src/lttng-tools/src/bin/lttng-sessiond/rotation-thread.cpp:402
    #7 0x55c55a46377f in std::unique_ptr<lttng::sessiond::rotation_thread, std::default_delete<lttng::sessiond::rotation_thread> > lttng::make_unique<lttng::sessiond::rotation_thread, lttng::sessiond::rotation_thread_timer_queue&, notification_thread_handle&>(lttng::sessiond::rotation_thread_timer_queue&, notification_thread_handle&) /home/simark/src/lttng-tools/src/common/make-unique.hpp:18
    #8 0x55c55a455024 in _main /home/simark/src/lttng-tools/src/bin/lttng-sessiond/main.cpp:1773
    #9 0x55c55a455c2e in main /home/simark/src/lttng-tools/src/bin/lttng-sessiond/main.cpp:1982
    #10 0x7f9385c1484f  (/usr/lib/libc.so.6+0x2384f) (BuildId: 2f005a79cd1a8e385972f5a102f16adba414d75e)

The rotation thread's pipe (an lttng_pipe object) is kept in a lttng_pipe::uptr, which only closes the pipe ends, but does not de-allocate the lttng_pipe structure.