damziobro / gdb-automatic-deadlock-detector Goto Github PK

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
__GI___poll (timeout=100, nfds=1, fds=0xbed30650) at ../sysdeps/unix/sysv/linux/poll.c:29
29 ../sysdeps/unix/sysv/linux/poll.c: No such file or directory.
custom command => blocked - command show how threads blocks themselves waiting on mutexes

Displaying blocking threads using 'blocked' command
/build/gdb-Y5K2MU/gdb-8.2.1/gdb/inline-frame.c:156: internal-error: void inline_frame_this_id(frame_info*, void**, frame_id*): Assertion `frame_id_p (*this_id)' fail.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) [answered Y; input not from terminal]

This is a bug, please report it. For instructions, see:
http://www.gnu.org/software/gdb/bugs/.

/build/gdb-Y5K2MU/gdb-8.2.1/gdb/inline-frame.c:156: internal-error: void inline_frame_this_id(frame_info*, void**, frame_id*): Assertion `frame_id_p (*this_id)' fail.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) [answered Y; input not from terminal]
Aborted (core dumped)

I got no useful output from the analysis:

$ gdb  -x gdbcommands  myexec  core.1234
[New LWP 2880]
[New LWP 32369]
[New LWP 3027]
[New LWP 25174]
o o o
********************************************************************************
Displaying blocking threads using 'blocked' command
Python Exception <type 'exceptions.TypeError'> argument of type 'NoneType' is not iterable: 
gdbcommands:5: Error in sourced command file:
Error occurred in Python command: argument of type 'NoneType' is not iterable

Given that NoneType is synonymous with "no data", can I assume that no deadlock was detected?

While running
gdb -c core ./deadlockExample -x ./gdbcommands -batch
got an error that module named gdbDisplayLockedThreads not found.

Looks like the current working directory is absent in the python path.

Hi,

Thanks a lot for this great script!
Am I right that it won't work for pthread_rwlock_t?

regards

When I tried using this script I got the following error

Displaying blocking threads using 'blocked' command
Python Exception <class 'gdb.error'> No symbol "mutex" in current context.:
Error occurred in Python command: No symbol "mutex" in current context.

Is this because of my pthread library? do we have any solution for the same?