[issue40746] test_gdb failing on Raspbian on 3.9, regression from 3.8

[STINNER Victor]

STINNER Victor  added the comment:

Some data from a recent build:
https://buildbot.python.org/all/#/builders/645/builds/480

That's 32-bit ARM, armv7l ABI with GCC 8.3 and GDB 8.2.

Python is built with -Og optimization level. In my experience, gdb fails to 
read debug symbols when Python is optimized at -Og level. Last time I asked a 
gdb developer, he told me that he always use -O0, so do I.


test.pythoninfo:

platform.architecture: 32bit ELF
platform.libc_ver: glibc 2.28
platform.platform: Linux-4.19.97-v7l+-armv7l-with-glibc2.28
platform.python_implementation: CPython

CC.version: gcc (Raspbian 8.3.0-6+rpi1) 8.3.0
sysconfig[PY_CFLAGS]: -Wno-unused-result -Wsign-compare -g -Og -Wall
sysconfig[PY_CFLAGS_NODIST]: -std=c99 -Wextra -Wno-unused-result 
-Wno-unused-parameter -Wno-missing-field-initializers 
-Werror=implicit-function-declaration -fvisibility=hidden -I./Include/internal
sysconfig[PY_STDMODULE_CFLAGS]: -Wno-unused-result -Wsign-compare -g -Og -Wall 
-std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter 
-Wno-missing-field-initializers -Werror=implicit-function-declaration 
-fvisibility=hidden -I./Include/internal -I. -I./Include

gdb_version: GNU gdb (Raspbian 8.2.1-2) 8.2.1

--
nosy: +vstinner

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

[issue40746] test_gdb failing on Raspbian on 3.9, regression from 3.8

[Gregory P. Smith]

New submission from Gregory P. Smith :

https://buildbot.python.org/all/#/builders/727

test_tuples (test.test_gdb.PrettyPrintTests)
Verify the pretty-printing of tuples ... ok
test_bt (test.test_gdb.PyBtTests)
Verify that the "py-bt" command works ... FAIL
Stderr:
Python Exception  Cannot access memory at address 
0xfedc: 
Error occurred in Python command: Cannot access memory at address 0xfedc

and a pile of similar errors after test_bt

Marking release blocker as this isn't present in 3.8 or earlier, we've got a 
regression here.

i haven't tried to debug yet, but that pointer value smells like something did 
a negative offset from NULL...

--
components: Tests
messages: 369736
nosy: gregory.p.smith
priority: release blocker
severity: normal
status: open
title: test_gdb failing on Raspbian on 3.9, regression from 3.8
versions: Python 3.10, Python 3.9

___
Python tracker 

___
___
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com