Re: [Valgrind-developers] 2009-07-05 03:05:05 BST nightly build (lloyd, x86_64, Fedora 7)

[Tom H. <to...@co...>]

On 06/07/09 05:44, Nicholas Nethercote wrote:
> On Sun, Jul 5, 2009 at 12:49 PM, Tom Hughes<th...@cy...>  wrote:
>
>> == 496 tests, 7 stderr failures, 1 stdout failure, 0 post failures ==
>> memcheck/tests/x86-linux/scalar          (stderr)
>> memcheck/tests/x86-linux/scalar_exit_group (stderr)
>> memcheck/tests/x86-linux/scalar_supp     (stderr)
>> none/tests/amd64/bug127521-64            (stdout)
>> none/tests/amd64/bug127521-64            (stderr)
>> exp-ptrcheck/tests/ccc                   (stderr)
>> exp-ptrcheck/tests/pth_create            (stderr)
>> exp-ptrcheck/tests/pth_specific          (stderr)
>
> Until recently, this machine had no test failures.  Most of the
> failures seem to be due to the DCAS merge -- Julian, can you take a
> look?  The scalar ones are a bit different, though, there's a
> conditional-jump-on-undefined that didn't used to be there.  Not sure
> about it.

The three memcheck ones are all this:

==24018== Conditional jump or move depends on uninitialised value(s)
==24018==    at 0x5FF2C2: _dl_runtime_resolve (in /lib/ld-2.6.so)
==24018==    by 0x620F6F: (below main) (in /lib/libc-2.6.so)

The none/tests/amd64/bug127521-64 one is an unsupported instruction 
failure on cmpxchg16 by the looks of it:

vex amd64->IR: unhandled instruction bytes: 0xF0 0x49 0xF 0xC7 0xA 0x49
...
==24044== Process terminating with default action of signal 4 (SIGILL)
==24044==  Illegal opcode at address 0x4006D2
==24044==    at 0x4006D2: do_cmpxchg16b (bug127521-64.c:79)
==24044==    by 0x4007AA: try16b (bug127521-64.c:106)
==24044==    by 0x400A9F: main (bug127521-64.c:135)

The ptrcheck ones are all an assertion failure:

t4 = CASle(t3::t0->t2)
exp-ptrcheck: h_main.c:4820 (schemeS): the 'impossible' happened.
==24071==    at 0x38010BFC: report_and_quit (m_libcassert.c:145)
==24071==    by 0x38010ECA: vgPlain_assert_fail (m_libcassert.c:216)
==24071==    by 0x3800601A: h_instrument (h_main.c:4820)
==24071==    by 0x3809694E: LibVEX_Translate (main_main.c:500)
==24071==    by 0x38026128: vgPlain_translate (m_translate.c:1517)
==24071==    by 0x38048B10: vgPlain_scheduler (scheduler.c:844)
==24071==    by 0x3806C71E: run_a_thread_NORETURN (syswrap-linux.c:91)

Tom

-- 
Tom Hughes (to...@co...)
http://www.compton.nu/