[Bug ada/83027] Hang when attaching a SIGINT handler

[tero.koskinen at iki dot fi]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83027

Tero Koskinen <tero.koskinen at iki dot fi> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tero.koskinen at iki dot fi

--- Comment #12 from Tero Koskinen <tero.koskinen at iki dot fi> ---
I can reproduce the problem on Fedora 26 (x86_64) with Fedora's gcc.

Linking libahven.so to simple_test dynamically causes the program to get stuck
(infinite loop / dead lock?).

Compiling Ahven from source code as a part of simple_test does not cause any
problems.

I would say the problem is either in GCC or in related components (binutils,
glibc, etc.).

% gcc -v
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap
--enable-languages=c,c++,objc,obj-c++,fortran,ada,go,lto --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared
--enable-threads=posix --enable-checking=release --enable-multilib
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-gcc-major-version-only --with-linker-hash-style=gnu --enable-plugin
--enable-initfini-array --with-isl --enable-libmpx
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-gnu-indirect-function --with-tune=generic --with-arch_32=i686
--build=x86_64-redhat-linux
Thread model: posix
gcc version 7.2.1 20170915 (Red Hat 7.2.1-2) (GCC)
%

Backtrace when the problem happens:
% gdb ./simple_test
GNU gdb (GDB) Fedora 8.0.1-30.fc26
Copyright (C) 2017 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from ./simple_test...(no debugging symbols found)...done.
(gdb) run
Starting program: /home/tkoskine/tmp/victor-bug2/src/simple_test
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[New Thread 0x7ffff648f700 (LWP 5685)]
[Thread 0x7ffff648f700 (LWP 5685) exited]
^C
Thread 1 "simple_test" received signal SIGINT, Interrupt.
0x0000000000454675 in system.file_io.check_file_open ()
(gdb) bt
#0  0x0000000000454675 in system.file_io.check_file_open ()
#1  0x0000000000451039 in ada.text_io.terminate_line ()
#2  0x0000000000455b2c in system.file_io.close ()
#3  0x0000000000455e43 in system.file_io.finalize ()
#4  0x000000000045623a in system.file_io.finalize_body ()
#5  0x000000000042e3b4 in ada_main.finalize_library ()
#6  0x00000000004395b6 in system.tasking.stages.finalize_global_tasks ()
#7  0x000000000042e3df in adafinal ()
#8  0x000000000042e8ee in main ()
#9  0x00007ffff73a688a in __libc_start_main (main=0x42e898 <main>, argc=1,
argv=0x7fffffffe158, init=<optimized out>, fini=<optimized out>,
    rtld_fini=<optimized out>, stack_end=0x7fffffffe148) at
../csu/libc-start.c:295
#10 0x000000000042e2aa in _start ()
(gdb) stepi
0x0000000000451039 in ada.text_io.terminate_line ()
(gdb)
0x000000000045103c in ada.text_io.terminate_line ()
(gdb)
0x0000000000454e40 in system.file_io.mode ()
(gdb)
0x0000000000454e43 in system.file_io.mode ()
(gdb)
0x0000000000454e45 in system.file_io.mode ()
(gdb)
0x0000000000454e49 in system.file_io.mode ()
(gdb)
0x0000000000451041 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451043 in ada.text_io.terminate_line ()
(gdb)
0x000000000045106d in ada.text_io.terminate_line ()
(gdb)
0x000000000045106e in ada.text_io.terminate_line ()
(gdb)
0x0000000000455b2c in system.file_io.close ()
(gdb)
0x0000000000455b2f in system.file_io.close ()
(gdb)
0x0000000000455b33 in system.file_io.close ()
(gdb)
0x0000000000455b35 in system.file_io.close ()
(gdb)
0x0000000000455b3b in system.file_io.close ()
(gdb)
0x0000000000455b3e in system.file_io.close ()
(gdb)
0x0000000000455b40 in system.file_io.close ()
(gdb)
0x0000000000455b43 in system.file_io.close ()
(gdb)
0x0000000000455b47 in system.file_io.close ()
(gdb)
0x0000000000455b4a in system.file_io.close ()
(gdb)
0x0000000000455c60 in system.file_io.close ()
(gdb)
0x0000000000455c64 in system.file_io.close ()
(gdb)
0x0000000000455c6b in system.file_io.close ()
(gdb)
0x0000000000455b58 in system.file_io.close ()
(gdb)
0x0000000000455b5b in system.file_io.close ()
(gdb)
0x0000000000455b5f in system.file_io.close ()
(gdb)
0x0000000000455b62 in system.file_io.close ()
(gdb)
0x0000000000455b64 in system.file_io.close ()
(gdb)
0x0000000000455b68 in system.file_io.close ()
(gdb)
0x0000000000455b6c in system.file_io.close ()
(gdb)
0x0000000000455b70 in system.file_io.close ()
(gdb)
0x0000000000455b72 in system.file_io.close ()
(gdb)
0x0000000000455bd7 in system.file_io.close ()
(gdb)
0x0000000000455bde in system.file_io.close ()
(gdb)
0x0000000000455be0 in system.file_io.close ()
(gdb)
0x0000000000455be6 in system.file_io.close ()
(gdb)
0x0000000000435c30 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c34 in system.tasking.initialization.task_unlock ()
(gdb)
0x00000000004337f0 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337f9 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fc in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fe in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x0000000000435c39 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c3f in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c42 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c44 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c4a in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c4c in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c50 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000455bec in system.file_io.close ()
(gdb)
0x0000000000455bed in system.file_io.close ()
(gdb)
0x0000000000455bee in system.file_io.close ()
(gdb)
0x0000000000455bf0 in system.file_io.close ()
(gdb)
0x0000000000455e43 in system.file_io.finalize ()
(gdb)
0x0000000000455e46 in system.file_io.finalize ()
(gdb)
0x0000000000455e4b in system.file_io.finalize ()
(gdb)
0x0000000000455e30 in system.file_io.finalize ()
(gdb)
0x0000000000455e34 in system.file_io.finalize ()
(gdb)
0x0000000000455e39 in system.file_io.finalize ()
(gdb)
0x0000000000455e3e in system.file_io.finalize ()
(gdb)
0x0000000000455b00 in system.file_io.close ()
(gdb)
0x0000000000455b02 in system.file_io.close ()
(gdb)
0x0000000000455b03 in system.file_io.close ()
(gdb)
0x0000000000455b04 in system.file_io.close ()
(gdb)
0x0000000000455b07 in system.file_io.close ()
(gdb)
0x0000000000435ab0 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ab4 in system.tasking.initialization.task_lock ()
(gdb)
0x00000000004337f0 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337f9 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fc in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fe in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x0000000000435ab9 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435abf in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ac2 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ac5 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435acb in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435acd in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ad1 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000455b0d in system.file_io.close ()
(gdb)
0x0000000000455b10 in system.file_io.close ()
(gdb)
0x0000000000455b13 in system.file_io.close ()
(gdb)
0x0000000000455b19 in system.file_io.close ()
(gdb)
0x0000000000455b1c in system.file_io.close ()
(gdb)
0x0000000000455b20 in system.file_io.close ()
(gdb)
0x0000000000455b22 in system.file_io.close ()
(gdb)
0x0000000000455b28 in system.file_io.close ()
(gdb)
0x0000000000455b2a in system.file_io.close ()
(gdb)
0x0000000000451090 in ada.text_io.afcb_close ()
(gdb)
0x0000000000451097 in ada.text_io.afcb_close ()
(gdb)
0x0000000000451099 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510a0 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510a2 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510a9 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510ab in ada.text_io.afcb_close ()
(gdb)
0x0000000000451030 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451031 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451034 in ada.text_io.terminate_line ()
(gdb)
0x0000000000454670 in system.file_io.check_file_open ()
(gdb)
0x0000000000454673 in system.file_io.check_file_open ()
(gdb)
0x0000000000454675 in system.file_io.check_file_open ()
(gdb)
0x0000000000451039 in ada.text_io.terminate_line ()
(gdb)
0x000000000045103c in ada.text_io.terminate_line ()
(gdb)
0x0000000000454e40 in system.file_io.mode ()
(gdb)
0x0000000000454e43 in system.file_io.mode ()
(gdb)
0x0000000000454e45 in system.file_io.mode ()
(gdb)
0x0000000000454e49 in system.file_io.mode ()
(gdb)
0x0000000000451041 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451043 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451045 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451049 in ada.text_io.terminate_line ()
(gdb)
0x000000000045104b in ada.text_io.terminate_line ()
(gdb)
0x0000000000451052 in ada.text_io.terminate_line ()
(gdb)
0x000000000045106d in ada.text_io.terminate_line ()
(gdb)
0x000000000045106e in ada.text_io.terminate_line ()
(gdb)
0x0000000000455b2c in system.file_io.close ()
(gdb)
0x0000000000455b2f in system.file_io.close ()
(gdb)
0x0000000000455b33 in system.file_io.close ()
(gdb)
0x0000000000455b35 in system.file_io.close ()
(gdb)
0x0000000000455b3b in system.file_io.close ()
(gdb)
0x0000000000455b3e in system.file_io.close ()
(gdb)
0x0000000000455b40 in system.file_io.close ()
(gdb)
0x0000000000455b43 in system.file_io.close ()
(gdb)
0x0000000000455b47 in system.file_io.close ()
(gdb)
0x0000000000455b4a in system.file_io.close ()
(gdb)
0x0000000000455c60 in system.file_io.close ()
(gdb)
0x0000000000455c64 in system.file_io.close ()
(gdb)
0x0000000000455c6b in system.file_io.close ()
(gdb)
0x0000000000455b58 in system.file_io.close ()
(gdb)
0x0000000000455b5b in system.file_io.close ()
(gdb)
0x0000000000455b5f in system.file_io.close ()
(gdb)
0x0000000000455b62 in system.file_io.close ()
(gdb)
0x0000000000455b64 in system.file_io.close ()
(gdb)
0x0000000000455b68 in system.file_io.close ()
(gdb)
0x0000000000455b6c in system.file_io.close ()
(gdb)
0x0000000000455b70 in system.file_io.close ()
(gdb)
0x0000000000455b72 in system.file_io.close ()
(gdb)
0x0000000000455bd7 in system.file_io.close ()
(gdb)
0x0000000000455bde in system.file_io.close ()
(gdb)
0x0000000000455be0 in system.file_io.close ()
(gdb)
0x0000000000455be6 in system.file_io.close ()
(gdb)
0x0000000000435c30 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c34 in system.tasking.initialization.task_unlock ()
(gdb)
0x00000000004337f0 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337f9 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fc in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fe in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x0000000000435c39 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c3f in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c42 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c44 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c4a in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c4c in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c50 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000455bec in system.file_io.close ()
(gdb)
0x0000000000455bed in system.file_io.close ()
(gdb)
0x0000000000455bee in system.file_io.close ()
(gdb)
0x0000000000455bf0 in system.file_io.close ()
(gdb)
0x0000000000455e43 in system.file_io.finalize ()
(gdb)
0x0000000000455e46 in system.file_io.finalize ()
(gdb)
0x0000000000455e4b in system.file_io.finalize ()
(gdb)
0x0000000000455e30 in system.file_io.finalize ()
(gdb)
0x0000000000455e34 in system.file_io.finalize ()
(gdb)
0x0000000000455e39 in system.file_io.finalize ()
(gdb)
0x0000000000455e3e in system.file_io.finalize ()
(gdb)
0x0000000000455b00 in system.file_io.close ()
(gdb)
0x0000000000455b02 in system.file_io.close ()
(gdb)
0x0000000000455b03 in system.file_io.close ()
(gdb)
0x0000000000455b04 in system.file_io.close ()
(gdb)
0x0000000000455b07 in system.file_io.close ()
(gdb)
0x0000000000435ab0 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ab4 in system.tasking.initialization.task_lock ()
(gdb)
0x00000000004337f0 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337f9 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fc in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fe in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x0000000000435ab9 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435abf in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ac2 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ac5 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435acb in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435acd in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ad1 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000455b0d in system.file_io.close ()
(gdb)
0x0000000000455b10 in system.file_io.close ()
(gdb)
0x0000000000455b13 in system.file_io.close ()
(gdb)
0x0000000000455b19 in system.file_io.close ()
(gdb)
0x0000000000455b1c in system.file_io.close ()
(gdb)
0x0000000000455b20 in system.file_io.close ()
(gdb)
0x0000000000455b22 in system.file_io.close ()
(gdb)
0x0000000000455b28 in system.file_io.close ()
(gdb)
0x0000000000455b2a in system.file_io.close ()
(gdb)
0x0000000000451090 in ada.text_io.afcb_close ()
(gdb)
0x0000000000451097 in ada.text_io.afcb_close ()
(gdb)
0x0000000000451099 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510a0 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510a2 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510a9 in ada.text_io.afcb_close ()
(gdb)
0x00000000004510ab in ada.text_io.afcb_close ()
(gdb)
0x0000000000451030 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451031 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451034 in ada.text_io.terminate_line ()
(gdb)
0x0000000000454670 in system.file_io.check_file_open ()
(gdb)
0x0000000000454673 in system.file_io.check_file_open ()
(gdb)
0x0000000000454675 in system.file_io.check_file_open ()
(gdb)
0x0000000000451039 in ada.text_io.terminate_line ()
(gdb)
0x000000000045103c in ada.text_io.terminate_line ()
(gdb)
0x0000000000454e40 in system.file_io.mode ()
(gdb)
0x0000000000454e43 in system.file_io.mode ()
(gdb)
0x0000000000454e45 in system.file_io.mode ()
(gdb)
0x0000000000454e49 in system.file_io.mode ()
(gdb)
0x0000000000451041 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451043 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451045 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451049 in ada.text_io.terminate_line ()
(gdb)
0x000000000045104b in ada.text_io.terminate_line ()
(gdb)
0x0000000000451052 in ada.text_io.terminate_line ()
(gdb)
0x0000000000451054 in ada.text_io.terminate_line ()
(gdb)
0x000000000045105b in ada.text_io.terminate_line ()
(gdb)
0x000000000045106d in ada.text_io.terminate_line ()
(gdb)
0x000000000045106e in ada.text_io.terminate_line ()
(gdb)
0x0000000000455b2c in system.file_io.close ()
(gdb)
0x0000000000455b2f in system.file_io.close ()
(gdb)
0x0000000000455b33 in system.file_io.close ()
(gdb)
0x0000000000455b35 in system.file_io.close ()
(gdb)
0x0000000000455b3b in system.file_io.close ()
(gdb)
0x0000000000455b3e in system.file_io.close ()
(gdb)
0x0000000000455b40 in system.file_io.close ()
(gdb)
0x0000000000455b43 in system.file_io.close ()
(gdb)
0x0000000000455b47 in system.file_io.close ()
(gdb)
0x0000000000455b4a in system.file_io.close ()
(gdb)
0x0000000000455c60 in system.file_io.close ()
(gdb)
0x0000000000455c64 in system.file_io.close ()
(gdb)
0x0000000000455c6b in system.file_io.close ()
(gdb)
0x0000000000455b58 in system.file_io.close ()
(gdb)
0x0000000000455b5b in system.file_io.close ()
(gdb)
0x0000000000455b5f in system.file_io.close ()
(gdb)
0x0000000000455b62 in system.file_io.close ()
(gdb)
0x0000000000455b64 in system.file_io.close ()
(gdb)
0x0000000000455b68 in system.file_io.close ()
(gdb)
0x0000000000455b6c in system.file_io.close ()
(gdb)
0x0000000000455b70 in system.file_io.close ()
(gdb)
0x0000000000455b72 in system.file_io.close ()
(gdb)
0x0000000000455bd7 in system.file_io.close ()
(gdb)
0x0000000000455bde in system.file_io.close ()
(gdb)
0x0000000000455be0 in system.file_io.close ()
(gdb)
0x0000000000455be6 in system.file_io.close ()
(gdb)
0x0000000000435c30 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c34 in system.tasking.initialization.task_unlock ()
(gdb)
0x00000000004337f0 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337f9 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fc in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fe in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x0000000000435c39 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c3f in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c42 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c44 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c4a in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c4c in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000435c50 in system.tasking.initialization.task_unlock ()
(gdb)
0x0000000000455bec in system.file_io.close ()
(gdb)
0x0000000000455bed in system.file_io.close ()
(gdb)
0x0000000000455bee in system.file_io.close ()
(gdb)
0x0000000000455bf0 in system.file_io.close ()
(gdb)
0x0000000000455e43 in system.file_io.finalize ()
(gdb)
0x0000000000455e46 in system.file_io.finalize ()
(gdb)
0x0000000000455e4b in system.file_io.finalize ()
(gdb)
0x0000000000455e30 in system.file_io.finalize ()
(gdb)
0x0000000000455e34 in system.file_io.finalize ()
(gdb)
0x0000000000455e39 in system.file_io.finalize ()
(gdb)
0x0000000000455e3e in system.file_io.finalize ()
(gdb)
0x0000000000455b00 in system.file_io.close ()
(gdb)
0x0000000000455b02 in system.file_io.close ()
(gdb)
0x0000000000455b03 in system.file_io.close ()
(gdb)
0x0000000000455b04 in system.file_io.close ()
(gdb)
0x0000000000455b07 in system.file_io.close ()
(gdb)
0x0000000000435ab0 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ab4 in system.tasking.initialization.task_lock ()
(gdb)
0x00000000004337f0 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337f9 in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fc in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x00000000004337fe in system__task_primitives__operations(short,...)(long,
float) ()
(gdb)
0x0000000000435ab9 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435abf in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ac2 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ac5 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435acb in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435acd in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000435ad1 in system.tasking.initialization.task_lock ()
(gdb)
0x0000000000455b0d in system.file_io.close ()
(gdb)
0x0000000000455b10 in system.file_io.close ()
(gdb)
0x0000000000455b13 in system.file_io.close ()
(gdb)
0x0000000000455b19 in system.file_io.close ()
(gdb)
0x0000000000455b1c in system.file_io.close ()
(gdb)