Issue 36183: test_gdb failed on AMD64 FreeBSD CURRENT Shared 3.7 and 3.x (original) (raw)
Created on 2019-03-04 14:09 by vstinner, last changed 2022-04-11 14:59 by admin. This issue is now closed.
Messages (11)
Author: STINNER Victor (vstinner) * 
Date: 2019-03-04 14:09
test_gdb failed on AMD64 FreeBSD CURRENT Shared 3.x failed.
Can it be related to my revert, commit 4d61e6e3b802399be62a521d6fa785698cb670b5?
https://buildbot.python.org/all/#/builders/168/builds/676
FAIL: test_corrupt_tp_flags (test.test_gdb.PrettyPrintTests) FAIL: test_corrupt_tp_name (test.test_gdb.PrettyPrintTests) FAIL: test_dicts (test.test_gdb.PrettyPrintTests) FAIL: test_exceptions (test.test_gdb.PrettyPrintTests) FAIL: test_frames (test.test_gdb.PrettyPrintTests) FAIL: test_frozensets (test.test_gdb.PrettyPrintTests) FAIL: test_getting_backtrace (test.test_gdb.PrettyPrintTests) FAIL: test_int (test.test_gdb.PrettyPrintTests) FAIL: test_lists (test.test_gdb.PrettyPrintTests) FAIL: test_modern_class (test.test_gdb.PrettyPrintTests) FAIL: test_selfreferential_dict (test.test_gdb.PrettyPrintTests) FAIL: test_selfreferential_list (test.test_gdb.PrettyPrintTests) FAIL: test_selfreferential_new_style_instance (test.test_gdb.PrettyPrintTests) FAIL: test_selfreferential_old_style_instance (test.test_gdb.PrettyPrintTests) FAIL: test_sets (test.test_gdb.PrettyPrintTests) FAIL: test_singletons (test.test_gdb.PrettyPrintTests) FAIL: test_strings (test.test_gdb.PrettyPrintTests) FAIL: test_subclassing_list (test.test_gdb.PrettyPrintTests) FAIL: test_subclassing_tuple (test.test_gdb.PrettyPrintTests) FAIL: test_truncation (test.test_gdb.PrettyPrintTests) FAIL: test_tuples (test.test_gdb.PrettyPrintTests) FAIL: test_basic_command (test.test_gdb.PyListTests) FAIL: test_one_abs_arg (test.test_gdb.PyListTests) FAIL: test_two_abs_args (test.test_gdb.PyListTests) FAIL: test_down_at_bottom (test.test_gdb.StackNavigationTests) FAIL: test_pyup_command (test.test_gdb.StackNavigationTests) FAIL: test_up_at_top (test.test_gdb.StackNavigationTests) FAIL: test_up_then_down (test.test_gdb.StackNavigationTests) FAIL: test_bt (test.test_gdb.PyBtTests) FAIL: test_bt_full (test.test_gdb.PyBtTests) FAIL: test_gc (test.test_gdb.PyBtTests) FAIL: test_pycfunction (test.test_gdb.PyBtTests) FAIL: test_threads (test.test_gdb.PyBtTests) FAIL: test_wrapper_call (test.test_gdb.PyBtTests) FAIL: test_basic_command (test.test_gdb.PyPrintTests) FAIL: test_print_after_up (test.test_gdb.PyPrintTests) FAIL: test_printing_builtin (test.test_gdb.PyPrintTests) FAIL: test_printing_global (test.test_gdb.PyPrintTests) FAIL: test_basic_command (test.test_gdb.PyLocalsTests) FAIL: test_locals_after_up (test.test_gdb.PyLocalsTests)
Example:
====================================================================== FAIL: test_NULL_ob_type (test.test_gdb.PrettyPrintTests) Ensure that a PyObject* with NULL ob_type is handled gracefully
Traceback (most recent call last): File "/usr/home/buildbot/python/3.x.koobs-freebsd-current/build/Lib/test/test_gdb.py", line 533, in test_NULL_ob_type self.assertSane('id(42)', File "/usr/home/buildbot/python/3.x.koobs-freebsd-current/build/Lib/test/test_gdb.py", line 504, in assertSane self.get_gdb_repr(source, File "/usr/home/buildbot/python/3.x.koobs-freebsd-current/build/Lib/test/test_gdb.py", line 269, in get_gdb_repr gdb_output = self.get_stack_trace(source, breakpoint=BREAKPOINT_FN, File "/usr/home/buildbot/python/3.x.koobs-freebsd-current/build/Lib/test/test_gdb.py", line 249, in get_stack_trace self.assertEqual(unexpected_errlines, []) AssertionError: Lists differ: ['Error: ', 'During startup program exited[62 chars]ck.'] != []
First list contains 4 additional elements. First extra element 0: 'Error: '
- []
- ['Error: ',
- 'During startup program exited with code 127.',
- 'No symbol "v" in current context.',
- 'No stack.']
Author: STINNER Victor (vstinner) *
Date: 2019-03-04 14:25
Extract of pythoninfo:
gdb_version: GNU gdb (GDB) 8.2.1 [GDB v8.2.1 for FreeBSD] sys.thread_info: sys.thread_info(name='pthread', lock='semaphore', version=None)
I'm unable to reproduce the issue on my FreeBSD 12 VM. But on my VM... I get a different issue: bpo-36184 "test_gdb.test_threads() is specific to _POSIX_THREADS, fail on FreeBSD".
Author: STINNER Victor (vstinner) *
Date: 2019-03-04 15:02
I tested gdb on the buildbot and I got permission errors, at least under my user "haypo":
warning: Could not trace the inferior process. Error: warning: ptrace: Operation not permitted
Logs:
CURRENT-amd64% gdb -args ./python Lib/test/gdb_sample.py GNU gdb (GDB) 8.2.1 [GDB v8.2.1 for FreeBSD] (...) warning: File "/usr/home/haypo/cpython/python-gdb.py" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load:~/prog/". To enable execution of this file add add-auto-load-safe-path /usr/home/haypo/cpython/python-gdb.py line to your configuration file "/home/haypo/.gdbinit". To completely disable this security protection add set auto-load safe-path / line to your configuration file "/home/haypo/.gdbinit".
(...)
(gdb) b builtin_id Breakpoint 1 at 0x451264: file Python/bltinmodule.c, line 1203.
(gdb) run Starting program: /usr/home/haypo/cpython/python Lib/test/gdb_sample.py warning: Could not trace the inferior process. Error: warning: ptrace: Operation not permitted
Author: STINNER Victor (vstinner) *
Date: 2019-03-04 15:05
On my FreeBSD 12.0 VM, "py-bt" works as expected. It might be a recent change in FreeBSD CURRENT kernel?
Author: STINNER Victor (vstinner) *
Date: 2019-03-04 15:47
Same errors on AMD64 FreeBSD CURRENT Shared 3.7: https://buildbot.python.org/all/#/builders/173/builds/333
Author: Pablo Galindo Salgado (pablogsal) *
Date: 2019-03-04 22:14
Koobs recently installed gdb on the buildbot to debug some of the recent race conditions. This is very likely to have caused some problems with the test suite.
Author: Pablo Galindo Salgado (pablogsal) *
Date: 2019-03-04 22:18
I think the solution here is uninstalling gdb from the buildbot. I have emailed Kubilay to see if he can revert the gdb installation to check if this is what is causing the problems.
Author: STINNER Victor (vstinner) *
Date: 2019-03-04 22:43
I think the solution here is uninstalling gdb from the buildbot. I have emailed Kubilay to see if he can revert the gdb installation to check if this is what is causing the problems.
Well, test_gdb should work on FreeBSD :-) If you and koobs prefer to remove gdb, I'm also fine with that.
Author: Kubilay Kocak (koobs) 
Date: 2019-03-05 01:30
Pablo asked for gdb to be installed to debug the crash in bug issue 36114 and I let him know in my email reply that when I had installed gdb in the past for an unrelated debug need, that test_gdb failed, which at the time I didn't have the time/cycles to report.
I too would prefer that test_gdb didn't fail with gdb installed, but am happy to remove it in the short term if requested, once crash analysis for issue 36114 is complete.
Author: Kubilay Kocak (koobs)
Date: 2019-03-05 01:33
I've just removed gdb from the buildbot at Pablo's (email) request. I can reinstall it on request at any time to resolve the test_gdb failures tracked in this issue.
Author: STINNER Victor (vstinner) *
Date: 2019-03-05 11:31
Since test_gdb only failed on your buildbot, I close the issue.
As I wrote, I'm unable to reproduce the issue on my FreeBSD 12 VM. It's not easy to debug if I don't have a full access (root user) to the issue. Moreover, honestly, I'm not really excited to debug this issue :-)
History
Date
User
Action
Args
2022-04-11 14:59:12
admin
set
github: 80364
2019-03-05 11:31:32
vstinner
set
status: open -> closed
resolution: fixed
messages: +
stage: resolved
2019-03-05 01:33:56
koobs
set
messages: +
2019-03-05 01:30:50
koobs
set
messages: +
2019-03-04 22:43:49
vstinner
set
messages: +
2019-03-04 22🔞20
pablogsal
set
messages: +
2019-03-04 22:14:10
pablogsal
set
messages: +
2019-03-04 15:47:45
vstinner
set
messages: +
title: test_gdb failed on AMD64 FreeBSD CURRENT Shared 3.x -> test_gdb failed on AMD64 FreeBSD CURRENT Shared 3.7 and 3.x
2019-03-04 15:29:53
vstinner
set
title: test_gdb failed on AMD64 FreeBSD CURRENT Shared 3.x failed -> test_gdb failed on AMD64 FreeBSD CURRENT Shared 3.x
2019-03-04 15:05:29
vstinner
set
messages: +
2019-03-04 15:02:58
vstinner
set
nosy: + koobs
messages: +
2019-03-04 14:25:22
vstinner
set
messages: +
2019-03-04 14:09:25
vstinner
create