[Bug target/46729] New: Many 32-bit 30_threads execution tests fail on Solaris 10+/SPARC with as

["ro at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46729

           Summary: Many 32-bit 30_threads execution tests fail on Solaris
                    10+/SPARC with as
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: ro@gcc.gnu.org
                CC: ebotcazou@gcc.gnu.org
              Host: sparc-sun-solaris2.1[01]
            Target: sparc-sun-solaris2.1[01]
             Build: sparc-sun-solaris2.1[01]


Many 32-bit 30_threads libstdc++ execution tests fail on Solaris 10 and
11/SPARC
with Sun as.  An example is

FAIL: 30_threads/async/42819.cc execution test

The test SEGVs like this:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0x00019f40 in __gthread_active_p (this=0x2be28)
    at
/var/gcc/regression/trunk/10-gcc/build/sparc-sun-solaris2.10/libstdc++-v3/include/sparc-sun-solaris2.10/bits/gthr-default.h:216
216       if (__builtin_expect (__gthread_active_latest_value < 0, 0))
(gdb) where
#0  0x00019f40 in __gthread_active_p (this=0x2be28)
    at
/var/gcc/regression/trunk/10-gcc/build/sparc-sun-solaris2.10/libstdc++-v3/include/sparc-sun-solaris2.10/bits/gthr-default.h:216
#1  __gthread_once (this=0x2be28)
    at
/var/gcc/regression/trunk/10-gcc/build/sparc-sun-solaris2.10/libstdc++-v3/include/sparc-sun-solaris2.10/bits/gthr-default.h:725
#2  call_once<std::_Mem_fn<void
(std::__future_base::_State::*)(std::function<std::unique_ptr<std::__future_base::_Result_base,
std::__future_base::_Result_base::_Deleter>()>&, bool&)>,
std::__future_base::_State* const,
std::reference_wrapper<std::function<std::unique_ptr<std::__future_base::_Result_base,
std::__future_base::_Result_base::_Deleter>()> >, std::reference_wrapper<bool>
> (
    this=0x2be28)
    at
/var/gcc/regression/trunk/10-gcc/build/sparc-sun-solaris2.10/libstdc++-v3/include/mutex:733
#3 
std::__future_base::_State::_M_set_result(std::function<std::unique_ptr<std::__future_base::_Result_base,
std::__future_base::_Result_base::_Deleter> ()()>, bool) (this=0x2be28)
    at
/var/gcc/regression/trunk/10-gcc/build/sparc-sun-solaris2.10/libstdc++-v3/include/future:313
#4  std::__future_base::_Deferred_state<int>::_M_run_deferred (this=0x2be28)
    at
/var/gcc/regression/trunk/10-gcc/build/sparc-sun-solaris2.10/libstdc++-v3/include/future:1295
#5  0x000171fc in std::__future_base::_State::wait (value=1)
    at
/var/gcc/regression/trunk/10-gcc/build/sparc-sun-solaris2.10/libstdc++-v3/include/future:281
#6  std::__basic_future<int>::_M_get_result (value=1)
    at
/var/gcc/regression/trunk/10-gcc/build/sparc-sun-solaris2.10/libstdc++-v3/include/future:515
#7  std::future<int>::get (value=1)
    at
/var/gcc/regression/trunk/10-gcc/build/sparc-sun-solaris2.10/libstdc++-v3/include/future:594
#8  work1 (value=1)
    at
/vol/gcc/src/hg/trunk/local/libstdc++-v3/testsuite/30_threads/async/42819.cc:36
#9  0x00019acc in test01 ()
    at
/vol/gcc/src/hg/trunk/local/libstdc++-v3/testsuite/30_threads/async/42819.cc:51
#10 0x00019b3c in main ()
    at
/vol/gcc/src/hg/trunk/local/libstdc++-v3/testsuite/30_threads/async/42819.cc:57

(gdb) display/i $pc
1: x/i $pc
=> 0x19f40 <_ZNSt13__future_base15_Deferred_stateIiE15_M_run_deferredEv+340>: 
st  %g2, [ %g3 ]
(gdb) p/x $g2
$4 = 0x154c8
(gdb) p/x $g3
$5 = 0x10b52a40

As can be seen with pmap, %g3 isn't mapped:

ro@yoda 2243 > pmap 5431
5431:   /var/gcc/regression/trunk/10-gcc/build/sparc-sun-solaris2.10/libstdc++
00010000      48K r-x-- 
/var/gcc/regression/trunk/10-gcc/build/sparc-sun-solaris2.10/libstdc++-v3/testsuite/42819.exe
0002A000       8K rwx-- 
/var/gcc/regression/trunk/10-gcc/build/sparc-sun-solaris2.10/libstdc++-v3/testsuite/42819.exe
0002C000      16K rwx--    [ heap ]
FE800000    1216K r-x--  /lib/libc.so.1

There is no problem with GNU as.