From: Andy Wingo <wingo@pobox.com>
To: mhw@netris.org
Cc: 20567@debbugs.gnu.org, "Schaefer, Frank" <frank.schaefer@tekcomms.com>
Subject: bug#20567: guile 2.0.11 - test failures on mips64 big-endian with n32 ABI
Date: Fri, 24 Jun 2016 07:17:50 +0200 [thread overview]
Message-ID: <87k2hfjhc1.fsf@pobox.com> (raw)
In-Reply-To: <14E7D810D073F84195C3EE3EBF1E9C35746EB81C@US-PLNO-EXM01-P.global.tektronix.net> (Frank Schaefer's message of "Wed, 13 May 2015 18:31:12 +0000")
Mark does this ring a bell to you? I know you have a mip64 n32 machine
that you use sometimes.
Andy
On Wed 13 May 2015 20:31, "Schaefer, Frank" <frank.schaefer@tekcomms.com> writes:
> I've encountered two test failures with guile 2.0.11 on mips64
> big-endian, whenever I build with -mabi=n32 (these test failures do
> not occur with -mabi=64). At least one of them I have resolved with
> the attached patch.
>
> First testcase failure: test-ffi (fixed by my patch). The guile code
> apparently assumes that sizeof(ffi_arg)<=sizeof(void **). This is a
> faulty assumption; it holds on *most* platforms, but with the mips64
> n32 ABI, sizeof(void **)==4, and sizeof(ffi_arg)==8. So every foreign
> function that returns a pointer is liable to corrupt data, and anyone
> retrieving the return value as a simple void * is only going to get
> sign-extension garbage on big-endian (usually NULL).
>
> Second testcase failure: check-guile fails due to 'ERROR:
> foreign.test: procedure->pointer: qsort - arguments:
> ((null-pointer-error "pointer->bytevector" "null pointer dereference"
> () ()))'. I strongly suspect it's related to the ffi_arg issue
> mentioned above, but I'm still peeling away macro ugliness to track it
> down. If anyone wants to pitch in with additional guidance or
> patchwork, I'd be happy to listen and test.
>
> (The patch applies against 2.0.11 release or against current HEAD,
> where it also fixes the new testcases for test-foreign-object-scm and
> test-foreign-object-c. HEAD also fails the test-out-of-memory case,
> though, which precludes further unit tests.)
prev parent reply other threads:[~2016-06-24 5:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-13 18:31 bug#20567: guile 2.0.11 - test failures on mips64 big-endian with n32 ABI Schaefer, Frank
2016-06-24 5:17 ` Andy Wingo [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/guile/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87k2hfjhc1.fsf@pobox.com \
--to=wingo@pobox.com \
--cc=20567@debbugs.gnu.org \
--cc=frank.schaefer@tekcomms.com \
--cc=mhw@netris.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).