Issue 13699: test_gdb has recently started failing (original) (raw)

test_gdb has started failing recently on my Ubuntu Natty system:

vinay@eta-natty:~/tools/cpython$ ./python Lib/test/regrtest.py -v test_gdb == CPython 3.3.0a0 (default:3ed5a6030c9b, Jan 2 2012, 23:04:11) [GCC 4.5.2] == Linux-2.6.38-13-generic-i686-with-debian-squeeze-sid little-endian == /home/vinay/tools/cpython/build/test_python_14449 Testing with flags: sys.flags(debug=0, inspect=0, interactive=0, optimize=0, dont_write_bytecode=0, no_user_site=0, no_site=0, ignore_environment=0, verbose=0, bytes_warning=0, quiet=0) [1/1] test_gdb

[successful tests snipped]

====================================================================== FAIL: test_print_after_up (test.test_gdb.PyPrintTests)

Traceback (most recent call last): File "/home/vinay/tools/cpython/Lib/test/test_gdb.py", line 670, in test_print_after_up r".\nlocal 'c' = 3\nlocal 'b' = 2\nlocal 'a' = 1\n.") File "/home/vinay/tools/cpython/Lib/test/test_gdb.py", line 171, in assertMultilineMatches self.fail(msg='%r did not match %r' % (actual, pattern)) AssertionError: 'Breakpoint 1 at 0x80ad5c6: file Python/bltinmodule.c, line 951.\n[Thread debugging using libthread_db enabled]\n\nBreakpoint 1, builtin_id (self=<module at remote 0xb7dd012c>, v=42) at Python/bltinmodule.c:951\n951\t return PyLong_FromVoidPtr(v);\n#6 (unable to read python frame information)\nUnable to read information on python frame\nUnable to read information on python frame\nUnable to read information on python frame\n' did not match ".\nlocal 'c' = 3\nlocal 'b' = 2\nlocal 'a' = 1\n."

====================================================================== FAIL: test_locals_after_up (test.test_gdb.PyLocalsTests)

Traceback (most recent call last): File "/home/vinay/tools/cpython/Lib/test/test_gdb.py", line 702, in test_locals_after_up r".\na = 1\nb = 2\nc = 3\n.") File "/home/vinay/tools/cpython/Lib/test/test_gdb.py", line 171, in assertMultilineMatches self.fail(msg='%r did not match %r' % (actual, pattern)) AssertionError: 'Breakpoint 1 at 0x80ad5c6: file Python/bltinmodule.c, line 951.\n[Thread debugging using libthread_db enabled]\n\nBreakpoint 1, builtin_id (self=<module at remote 0xb7dd012c>, v=42) at Python/bltinmodule.c:951\n951\t return PyLong_FromVoidPtr(v);\n#6 (unable to read python frame information)\nUnable to read information on python frame\n' did not match '.\na = 1\nb = 2\nc = 3\n.'

Ran 42 tests in 13.809s

FAILED (failures=2, skipped=11) test test_gdb failed 1 test failed: test_gdb

vinay@eta-natty:~/tools/cpython$ ./python Python 3.3.0a0 (default:3ed5a6030c9b, Jan 2 2012, 23:04:11) [GCC 4.5.2] on linux Type "help", "copyright", "credits" or "license" for more information.

import sysconfig sysconfig.get_config_vars()['PY_CFLAGS'] '-Wno-unused-result -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes'

vinay@eta-natty:~/tools/cpython$ gdb --version GNU gdb (Ubuntu/Linaro 7.2-1ubuntu11) 7.2 Copyright (C) 2010 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 "i686-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>.

vinay@eta-natty:~/tools/cpython$ gcc --version gcc (Ubuntu/Linaro 4.5.2-8ubuntu4) 4.5.2 Copyright (C) 2010 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

vinay@eta-natty:~/tools/cpython$ uname -a Linux eta-natty 2.6.38-13-generic #53-Ubuntu SMP Mon Nov 28 19:23:39 UTC 2011 i686 i686 i386 GNU/Linux

Marking haypo as nosy since it might be related to recent changes for #13628.

In earlier tests (conducted on 12 Dec, before the #13628 fix was checked in) test_gdb did not fail on the same system.

"test_gdb has started failing recently on my Ubuntu Natty system: ...

sysconfig.get_config_vars()['PY_CFLAGS'] '-Wno-unused-result -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes' ... Marking haypo as nosy since it might be related to recent changes for #13628."

Before my last change for #13628, test_gdb was skipped completly when Python was compiled in release mode (with gcc optimization, which is the default).

Except if you have an idea to improve python-gdb.py to make it find the frame pointer, the simple fix is to skip the failing tests if Python is optimized. I already add some @unittest.skipIf(python_is_optimized(), "Python was compiled with optimizations") in my commit 0b03cb97dac0.

Would you like to write such patch?