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* [Bug target/63610] New: OSX 10.10 (Yosemite) segfault in MPIR testsuite with -O0 or -O1
@ 2014-10-21 18:36 vbraun at physics dot upenn.edu
  2014-10-21 18:37 ` [Bug target/63610] " vbraun at physics dot upenn.edu
                   ` (15 more replies)
  0 siblings, 16 replies; 17+ messages in thread
From: vbraun at physics dot upenn.edu @ 2014-10-21 18:36 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63610

            Bug ID: 63610
           Summary: OSX 10.10 (Yosemite) segfault in MPIR testsuite with
                    -O0 or -O1
           Product: gcc
           Version: 4.9.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vbraun at physics dot upenn.edu

Trying to bulid gcc on OSX 10.10 with the Apple command line tools. So I first
compile MPIR/MPFR/MPC with clang, then bootstrap gcc. This works so far (the
patch from PR target/61407 for dealing with the version parsing is applied).
But the newly-built gcc can't successfully compile MPIR, and I'm getting the
testsuite failures below. The failure is only present if I both enable C++
(--enable-cxx in the MPIR configure), build a shared library, and set
optimization to -O0 or -O1 (whereas -O2 works).

Steps to reproduce (in the MPIR 2.6.0 source directory):

$ export CFLAGS=-O0
$ ./configure --enable-cxx --disable-static
$ make
$ make check
[...]
make  check-TESTS
/bin/sh: line 1: 59465 Segmentation fault: 11  "$tst" > t-bswap.log-t 2>&1
FAIL: t-bswap
PASS: t-constants
PASS: t-count_zeros
PASS: t-gmpmax
PASS: t-hightomask
PASS: t-modlinv
PASS: t-parity
/bin/sh: line 1: 59648 Segmentation fault: 11  "$tst" > t-popc.log-t 2>&1
FAIL: t-popc
PASS: t-sub
=============================================================
2 of 9 tests failed
See tests/test-suite.log
Please report to http://groups.google.co.uk/group/mpir-devel/
=============================================================
make[5]: *** [test-suite.log] Error 1
make[4]: *** [check-TESTS] Error 2
make[3]: *** [check-am] Error 2
make[2]: *** [check-recursive] Error 1
make[1]: *** [check-recursive] Error 1
make: *** [check] Error 2

Apart from the segfault, there is nothing in the log (full log attached) that
indicates a failure. It seems that lower optimization leaves something in the
binary that interacts badly with C++ support, but I don't have a better
testcase. It is not just in MPIR, I get similar looking segfaults in other
shared libraries when C++ is involved. Others have been able to reproduce the
same testsuite failure on OSX. Works fine on Linux x86_64 with same versions of
everything (except that gcc is used to bootstrap, of course).

Stack backtrace from the t-popc test (full gdb log attached):

#0  0x00007fff86172432 in __block_descriptor_tmp227 () from
/usr/lib/system/libdyld.dylib
#1  0x00007fff5fbffa80 in ?? ()
#2  0x00000001000ca0d0 in ?? () from
/Users/vbraun/Code/mpir-2.6.0/.libs/libmpir.11.dylib
#3  0x000000000000011d in ?? ()
#4  0x00000001000223c1 in __gmp_randget_mt (rstate=0x7fff5fbffb60,
dest=0x7fff5fbffab0, nbits=32)
    at randmt.c:256
#5  0x000000010006d81d in ?? () from
/Users/vbraun/Code/mpir-2.6.0/.libs/libmpir.11.dylib
#6  0x000000010006d71c in ?? () from
/Users/vbraun/Code/mpir-2.6.0/.libs/libmpir.11.dylib
#7  0x0000000100000f8c in main () at t-popc.c:60
(gdb) frame 4
#4  0x00000001000223c1 in __gmp_randget_mt (rstate=0x7fff5fbffb60,
dest=0x7fff5fbffab0, nbits=32)
    at randmt.c:256
256          NEXT_RANDOM;

The NEXT_RANDOM macro is just the next step of MPIR's Mersenne twister, it only
does elementary bit operations on the state variable. It also only fails after
the 70th iteration of the outermost loop. Successive runs always fail in the
same __block_descriptor_tmp227. The other failing testcase t-bswap also
segfaults in the Mersenne twister.


^ permalink raw reply	[flat|nested] 17+ messages in thread
end of thread, other threads:[~2014-11-14 11:19 UTC | newest]

Thread overview: 17+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-10-21 18:36 [Bug target/63610] New: OSX 10.10 (Yosemite) segfault in MPIR testsuite with -O0 or -O1 vbraun at physics dot upenn.edu
2014-10-21 18:37 ` [Bug target/63610] " vbraun at physics dot upenn.edu
2014-10-21 18:37 ` vbraun at physics dot upenn.edu
2014-10-21 19:15 ` vbraun at physics dot upenn.edu
2014-10-23 13:22 ` vbraun.name at gmail dot com
2014-10-23 13:56 ` vbraun.name at gmail dot com
2014-10-27 12:48 ` howarth at bromo dot med.uc.edu
2014-10-27 13:07 ` howarth at bromo dot med.uc.edu
2014-10-27 13:13 ` vbraun.name at gmail dot com
2014-11-11  9:15 ` [Bug target/63610] Fixing the libtool bug for Yosemite (darwin14) fxcoudert at gcc dot gnu.org
2014-11-11 20:25 ` fxcoudert at gcc dot gnu.org
2014-11-12 22:44 ` fxcoudert at gcc dot gnu.org
2014-11-12 22:59 ` howarth at bromo dot med.uc.edu
2014-11-14  8:37 ` fxcoudert at gcc dot gnu.org
2014-11-14  8:52 ` iains at gcc dot gnu.org
2014-11-14  9:16 ` fxcoudert at gcc dot gnu.org
2014-11-14 11:19 ` howarth at bromo dot med.uc.edu

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