Re: memory errors in 3.8.2

[Tom McDermott]

Hi Marcus - thanks for the reply.   Previously I had rebuilt my OOT by

deleting all contents of ./build, then going through cmake, make, make install, and ldconfig.

cmake reported:

-- Found PythonInterp: /usr/bin/python3 (found version "3.8.2")
-- Found PythonLibs: /usr/lib/x86_64-linux-gnu/libpython3.8.so (found suitable exact version "3.8.2")

and:

usr/lib/x86_64-linux-gnu$ ls -la libpython*
lrwxrwxrwx 1 root root      55 Jul 16 07:00 libpython3.8.a -> ../python3.8/config-3.8-x86_64-linux-gnu/libpython3.8.a
lrwxrwxrwx 1 root root      17 Jul 16 07:00 libpython3.8.so -> libpython3.8.so.1
lrwxrwxrwx 1 root root      19 Jul 16 07:00 libpython3.8.so.1 -> libpython3.8.so.1.0
-rw-r--r-- 1 root root 5416192 Jul 16 07:00 libpython3.8.so.1.0

So I think that the tools would have linked against 3.8.2, but I do not know how to view the

exact linker commands when using the cmake and make tools.

-- Tom, N5EG

On Mon, Sep 7, 2020 at 4:37 AM Marcus Müller <mueller@kit.edu> wrote:

Hi Tom,

just to verify: You did recompile your module against 3.8.2.0 and not
accidentally linked it against a gnuradio-something.so of 3.8.1.0 that
lingered on your system? I ask because these things really happen often.

Best regards,
Marcus

On 06/09/2020 23.48, Tom McDermott wrote:
> My Ubuntu 20.04 updated automatically to 3.8.2.
>
> SInce the update I have been getting memory error messages in the
> gnuradio-companion terminal window.
> These errors did not occur in 3.8.1.  The error is not consistent,
> always get one of the following three error messages:
>
> double free or corruption (!prev)
>
> malloc_consolidate(): invalid chunk size
> Aborted (core dumped)
>
> corrupted size vs. prev_size while consolidating
>
> Have commented out all instances of delete [] in my destructors, but no
> change to the errors. No instances of free() in my code.
>
> The errors occur after stopping the flowgraph from gnuradio-companion.
> I was able to catch the "corrupted size vs. prev_size while
> consolidating"   error using gdb  (OOT built with
> -DCMAKE_BUYILD_TYPE=Debug).
>
> Thread 1 "python3" received signal SIGINT, Interrupt.
> 0x00007ffff7ed396f in __GI___poll (fds=0x22c9990, nfds=4, timeout=14712)
>      at ../sysdeps/unix/sysv/linux/poll.c:29
> 29 ../sysdeps/unix/sysv/linux/poll.c: No such file or directory.
> (gdb) bt
> #0  0x00007ffff7ed396f in __GI___poll (fds=0x22c9990, nfds=4, timeout=14712)
>      at ../sysdeps/unix/sysv/linux/poll.c:29
> #1  0x00007ffff39cc1ae in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
> #2  0x00007ffff39cc2e3 in g_main_context_iteration ()
>     from /lib/x86_64-linux-gnu/libglib-2.0.so.0
> #3  0x00007ffff3770fd5 in g_application_run ()
>     from /lib/x86_64-linux-gnu/libgio-2.0.so.0
> #4  0x00007ffff524fff5 in ?? () from /lib/x86_64-linux-gnu/libffi.so.7
> #5  0x00007ffff524f40a in ?? () from /lib/x86_64-linux-gnu/libffi.so.7
> #6  0x00007ffff3ae50a5 in ?? ()
>     from
> /usr/lib/python3/dist-packages/gi/_gi.cpython-38-x86_64-linux-gnu.so
> <http://gi.cpython-38-x86_64-linux-gnu.so>
> #7  0x00007ffff3adc25c in ?? ()
>     from
> /usr/lib/python3/dist-packages/gi/_gi.cpython-38-x86_64-linux-gnu.so
> <http://gi.cpython-38-x86_64-linux-gnu.so>
> #8  0x00000000005f118e in PyObject_Call ()
> #9  0x0000000000568e1f in _PyEval_EvalFrameDefault ()
> #10 0x0000000000565972 in _PyEval_EvalCodeWithName ()
> #11 0x00000000005f1d85 in _PyFunction_Vectorcall ()
> #12 0x00000000005677c7 in _PyEval_EvalFrameDefault ()
> #13 0x00000000005f1b8b in _PyFunction_Vectorcall ()
> #14 0x000000000056769f in _PyEval_EvalFrameDefault ()
> #15 0x00000000005f1b8b in _PyFunction_Vectorcall ()
> #16 0x000000000056769f in _PyEval_EvalFrameDefault ()
> #17 0x0000000000565972 in _PyEval_EvalCodeWithName ()
> --Type <RET> for more, q to quit, c to continue without paging--
> #18 0x0000000000686053 in PyEval_EvalCode ()
> #19 0x00000000006753d1 in ?? ()
> #20 0x000000000067544f in ?? ()
> #21 0x0000000000675507 in PyRun_FileExFlags ()
> #22 0x000000000067758a in PyRun_SimpleFileExFlags ()
> #23 0x00000000006ae99e in Py_RunMain ()
> #24 0x00000000006aed29 in Py_BytesMain ()
> #25 0x00007ffff7de50b3 in __libc_start_main (main=0x4ebd20 <main>, argc=2,
>      argv=0x7fffffffe028, init=<optimized out>, fini=<optimized out>,
>      rtld_fini=<optimized out>, stack_end=0x7fffffffe018) at
> ../csu/libc-start.c:308
> #26 0x00000000005f62ee in _start ()
>
> -- Tom, N5EG
>