kryheb <[email protected]> added the comment:
Hi vstinner,
I apologize for the inaccurate code sample.
Please find a simplified example without threads `inittab-bug_no-threads.c` in
attachments. Please notice that __main__.py has changed, there is no infinite
loop anymore.
Steps to reproduce:
1. Append embedded module
2. Initialize Python from config with run_filename
3. Run main
4. Finalize
5. Repeat all above
Observed behavior:
The script is executed at the first iteration, but re-initialization fails with
a segmentation fault:
gdb) r
Starting program: /home/kheb/proj/tmp/pyc/a.out
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Run Python Script
>>> This is the python script
Python Script completed (0)
Program received signal SIGSEGV, Segmentation fault.
__strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:65
65 VPCMPEQ (%rdi), %ymm0, %ymm1
Missing separate debuginfos, use: dnf debuginfo-install
libxcrypt-4.4.20-2.fc33.x86_64
(gdb) bt
#0 __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:65
#1 0x00007ffff7d039f0 in PyUnicode_FromString (
u=0xdddddddddddddddd <error: Cannot access memory at address
0xdddddddddddddddd>)
at Objects/unicodeobject.c:2309
#2 0x00007ffff7dbf049 in list_builtin_module_names () at
./Python/sysmodule.c:2056
#3 0x00007ffff7dc1777 in _PySys_InitCore (tstate=tstate@entry=0x422ac0,
sysdict=sysdict@entry=0x7fffea221070)
at ./Python/sysmodule.c:2813
#4 0x00007ffff7dc36ef in _PySys_Create (tstate=tstate@entry=0x422ac0,
sysmod_p=sysmod_p@entry=0x7fffffffd9d8)
at ./Python/sysmodule.c:3087
#5 0x00007ffff7da9b32 in pycore_interp_init (tstate=0x422ac0) at
Python/pylifecycle.c:824
#6 0x00007ffff7da9c8e in pyinit_config (runtime=runtime@entry=0x7ffff7fbe820
<_PyRuntime>,
tstate_p=tstate_p@entry=0x7fffffffdca8, config=config@entry=0x7fffffffdac0)
at Python/pylifecycle.c:866
#7 0x00007ffff7daba3e in pyinit_core (runtime=runtime@entry=0x7ffff7fbe820
<_PyRuntime>,
src_config=src_config@entry=0x7fffffffdd40,
tstate_p=tstate_p@entry=0x7fffffffdca8) at Python/pylifecycle.c:1029
#8 0x00007ffff7dabb18 in Py_InitializeFromConfig (config=0x7fffffffdd40) at
Python/pylifecycle.c:1214
#9 0x00000000004012d3 in main (argc=1, argv=0x7fffffffdfc8) at
inittab-bug_no-threads.c:45
I hope this example helps.
Best regards,
Krystian
----------
Added file: https://bugs.python.org/file50125/inittab-bug_no-threads.c
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<https://bugs.python.org/issue44441>
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