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mohandev2 / openhpi_old

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The ov_rest plugin could go to deadlock #1998

Closed mohandev2 closed 6 years ago

mohandev2 commented 6 years ago

In a rare situation (when the synergy ring is installed with new bits, many manual changes are done etc) ov_rest plugin could get into a deadlock situation. Was unable to reproduce.

(gdb) info threads Id Target Id Frame 6 Thread 0x7f5be64b5700 (LWP 26955) "DiscoveryThread" 0x00007f5beb373949 in syscall () from /lib64/libc.so.6 5 Thread 0x7f5be5cb4700 (LWP 26956) "EventGet" 0x00007f5bec7cff4d in __lll_lock_wait () from /lib64/libpthread.so.0 4 Thread 0x7f5be4cb2700 (LWP 26958) "ov_rest_event_t" 0x00007f5beb373949 in syscall () from /lib64/libc.so.6 3 Thread 0x7f5bd7fff700 (LWP 3895) "pool" 0x00007f5beb373949 in syscall () from /lib64/libc.so.6 2 Thread 0x7f5bd75dc700 (LWP 3898) "pool" 0x00007f5beb373949 in syscall () from /lib64/libc.so.6

Thread 6 (Thread 0x7f5be64b5700 (LWP 26955)):

0 0x00007f5beb373949 in syscall () from /lib64/libc.so.6

1 0x00007f5bebb77306 in g_mutex_lock_slowpath () from /lib64/libglib-2.0.so.0

2 0x00007f5be93fa40f in ov_rest_discover_resources (oh_handler=0x16e43b0) at ov_rest_discover.c:1634

3 0x00000000004150d0 in oh_discovery () at plugin.c:740

4 0x00000000004247de in discovery_func (data=) at threaded.c:50

5 0x00007f5bebbcb4e5 in g_thread_proxy () from /lib64/libglib-2.0.so.0

6 0x00007f5bec7c9dc5 in start_thread () from /lib64/libpthread.so.0

7 0x00007f5beb3791cd in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f5be5cb4700 (LWP 26956)):

0 0x00007f5bec7cff4d in __lll_lock_wait () from /lib64/libpthread.so.0

1 0x00007f5bec7cbd1d in _L_lock_840 () from /lib64/libpthread.so.0

2 0x00007f5bec7cbc3a in pthread_mutex_lock () from /lib64/libpthread.so.0

3 0x0000000000414c31 in oh_get_handler (hid=hid@entry=1) at plugin.c:415

4 0x0000000000412def in oh_harvest_events () at event.c:204

5 0x0000000000424683 in evtget_func (data=) at threaded.c:93

6 0x00007f5bebbcb4e5 in g_thread_proxy () from /lib64/libglib-2.0.so.0

7 0x00007f5bec7c9dc5 in start_thread () from /lib64/libpthread.so.0

8 0x00007f5beb3791cd in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f5be4cb2700 (LWP 26958)):

0 0x00007f5beb373949 in syscall () from /lib64/libc.so.6

1 0x00007f5bebb77306 in g_mutex_lock_slowpath () from /lib64/libglib-2.0.so.0

2 0x00007f5be93e1c5c in ov_rest_re_discover (handler=handler@entry=0x16e43b0) at ov_rest_event.c:1759

3 0x00007f5be93e33f0 in ov_rest_event_thread (ov_pointer=0x16e43b0) at ov_rest_event.c:1934

4 0x00007f5bebbcb4e5 in g_thread_proxy () from /lib64/libglib-2.0.so.0

5 0x00007f5bec7c9dc5 in start_thread () from /lib64/libpthread.so.0

6 0x00007f5beb3791cd in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f5bd7fff700 (LWP 3895)):

0 0x00007f5beb373949 in syscall () from /lib64/libc.so.6

1 0x00007f5bebb77306 in g_mutex_lock_slowpath () from /lib64/libglib-2.0.so.0

2 0x0000000000424af5 in oh_wake_discovery_thread () at threaded.c:233

3 0x00000000004162a7 in saHpiDiscover (SessionId=) at safhpi.c:108

4 0x000000000040cba8 in process_msg (changed_sid=, data_len=@0x7f5bd7fecedc: 4, data=0x7f5bd7feed90 "\b", rq_byte_order=1234, hm=0x7f5bec7b70c0 <hpi_marshal+64>) at server.cpp:398

5 service_thread (sock_ptr=) at server.cpp:261

6 0x00007f5bebbcbe6c in g_thread_pool_thread_proxy () from /lib64/libglib-2.0.so.0

7 0x00007f5bebbcb4e5 in g_thread_proxy () from /lib64/libglib-2.0.so.0

8 0x00007f5bec7c9dc5 in start_thread () from /lib64/libpthread.so.0

9 0x00007f5beb3791cd in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f5bd75dc700 (LWP 3898)):

0 0x00007f5beb373949 in syscall () from /lib64/libc.so.6

1 0x00007f5bebb77306 in g_mutex_lock_slowpath () from /lib64/libglib-2.0.so.0

2 0x0000000000424af5 in oh_wake_discovery_thread () at threaded.c:233

3 0x00000000004162a7 in saHpiDiscover (SessionId=) at safhpi.c:108

4 0x000000000040cba8 in process_msg (changed_sid=, data_len=@0x7f5bd75c9edc: 4, data=0x7f5bd75cbd90 "\t", rq_byte_order=1234, hm=0x7f5bec7b70c0 <hpi_marshal+64>) at server.cpp:398

5 service_thread (sock_ptr=) at server.cpp:261

6 0x00007f5bebbcbe6c in g_thread_pool_thread_proxy () from /lib64/libglib-2.0.so.0

7 0x00007f5bebbcb4e5 in g_thread_proxy () from /lib64/libglib-2.0.so.0

8 0x00007f5bec7c9dc5 in start_thread () from /lib64/libpthread.so.0

9 0x00007f5beb3791cd in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f5bedaf7840 (LWP 26954)):

0 0x00007f5beb373949 in syscall () from /lib64/libc.so.6

1 0x00007f5bebbe8c7c in g_cond_wait () from /lib64/libglib-2.0.so.0

2 0x00007f5bebbcc550 in g_thread_pool_free () from /lib64/libglib-2.0.so.0

3 0x0000000000411f58 in oh_server_run (ipvflags=ipvflags@entry=1, bindaddr=, port=, sock_timeout=, max_threads=-1) at server.cpp:202

Reported by: mohandev2

Original Ticket: openhpi/bugs/1998

mohandev2 commented 6 years ago

Original comment by: HemanthBeecherla

mohandev2 commented 6 years ago

This is a bug that got closed when #1999 was closed. So going to mark this as duplicate of #1999

mohandev2 commented 6 years ago

Duplicate of #1999