[snake-farm] Re: [Python-Dev] Snake farm (original) (raw)

Marc Recht marc@informatik.uni-bremen.de
11 Nov 2002 15:32:08 +0100

--=-0eck4PWYK41vrXLCc4++ Content-Type: text/plain Content-Transfer-Encoding: quoted-printable

But there are optimization flags set by default in the Makefile (at OPT=3D...). Can you take out the -O3 from the OPT variable and start over? As Tim Peters suggested, this may be an optimizer bug. I removed them from the Makefile. (Of course :-))

So it looks like PyOblectFree() was called with 0x800 as an argument, which is a bogus pointer value. Can you go up one stack level and see what the value of k in functioncall() is? 713 if (ADDRESS_IN_RANGE(p, pool->arenaindex)) { (gdb) up #1 0x080dfef4 in function_call (func=3D0x826317c, arg=3D0x8256aac, kw=3D0x8269bdc) at Objects/funcobject.c:481 481 PyMem_DEL(k); (gdb) p k $1 =3D (struct _object **) 0x800

Well, --without-pymalloc means that this code is never executed. It's disturbing that --with-pydebug doesn't reveal a problem though; that again points in the direction of the optimizer. CC=3D'gcc' LDSHARED=3D'cc -shared ' OPT=3D'-DNDEBUG -g -Wall -Wstrict-prototypes' ./python -E ./setup.py build;

Except "prefix" no option was given to configure.

Regards, Marc

--=20 "Premature optimization is the root of all evil." -- Donald E. Knuth

--=-0eck4PWYK41vrXLCc4++ Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part

-----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (FreeBSD)

iD8DBQA9z79o7YQCetAaG3MRAmmUAJwII/rKDeq8mjUVejNWutikYCQoKgCfRqd1 kbYMHEzUgP6wHhu+/DV0KX4= =hHre -----END PGP SIGNATURE-----

--=-0eck4PWYK41vrXLCc4++--