We are getting the core dumps while trying to execute python-2.5.1 ctypes test
cases in 64-bit mode in AIX 5.3 using xlc compiler.
First we applied this patch
http://gcc.gnu.org/bugzilla/attachment.cgi?id=15274&action=diff to libffi-3.0.8
for the support of
64-bit libffi in AIX and we compiled the libffi, built the python-2.5.1 using
the configuration option --with-system-ffi,
then we tried to execute the test cases which are at "Lib/ctypes/test"
directory in the python source code.
Some of the test cases are dumping core, and the failures are
Segmentation fault in ffi_closure_helper_DARWIN at line 702 in file "" ($t1)
could not read "src/powerpc/ffi_darwin.c"
Segmentation fault in ffi_call_AIX at 0x9000000042db8e4 ($t1)
0x9000000042db8e4 (ffi_call_AIX+0xf4) ebfcfff8 ld r31,-8(r28)
Segmentation fault in PyString_FromStringAndSize at 0x900000002c295ac ($t1)
0x900000002c295ac (PyString_FromStringAndSize+0x1ec) 881e0000 lbz
r0,0x0(r30)
We did some analysis and it seems that the .ffi_closure_ASM code in
aix_closure.S file
is not doing correct stack progression.
Please let me know if you need any other info.
Thanks,
Sangamesh
--
Summary: Core dumps while executing ctypes test cases of python-
2.5.1 in AIX 5.3
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: libffi
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: swamy dot sangamesh at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42423
