[Bug go/59433] New: [4.9 regression] Many 64-bit Go tests SEGV on Solaris

[ro at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59433

            Bug ID: 59433
           Summary: [4.9 regression] Many 64-bit Go tests SEGV on Solaris
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: go
          Assignee: ian at airs dot com
          Reporter: ro at gcc dot gnu.org
              Host: *-*-solaris2.1[01]
            Target: *-*-solaris2.1[01]
             Build: *-*-solaris2.1[01]

Many (most) 64-bit Go tests now FAIL with a SEGV on Solaris, both SPARC and
x86, here shown on the example of the bufio test:

* i386-pc-solaris2.10:


Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 2 (LWP 2)]
runtime_netpoll (block=block@entry=0 '\000')
    at /vol/gcc/src/hg/trunk/solaris/libgo/runtime/netpoll_select.c:143
143             __builtin_memcpy(&rfds, &fds, sizeof fds);
(gdb) where
#0  runtime_netpoll (block=block@entry=0 '\000')
    at /vol/gcc/src/hg/trunk/solaris/libgo/runtime/netpoll_select.c:143
#1  0xfffffd7ffec0e95a in sysmon ()
    at /vol/gcc/src/hg/trunk/solaris/libgo/runtime/proc.c:2707
#2  0xfffffd7ffec0d378 in runtime_mstart (mp=0xc210212000)
    at /vol/gcc/src/hg/trunk/solaris/libgo/runtime/proc.c:1016
#3  0xfffffd7ffe4dd9db in _thr_setup () from /lib/64/libc.so.1
#4  0xfffffd7ffe4ddc10 in ?? () from /lib/64/libc.so.1
#5  0x0000000000000000 in ?? ()
(gdb) p rfds
Cannot access memory at address 0xfffffd7ffe0f9f00
(gdb) p fds
$1 = {fds_bits = {0 <repeats 1024 times>}}

* sparc-sun-solaris2.11:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 2 (LWP 2)]
runtime_netpoll (block=block@entry=0 '\000')
    at /vol/gcc/src/hg/trunk/solaris/libgo/runtime/netpoll_select.c:153
153             __builtin_memset(&timeout, 0, sizeof timeout);
(gdb) where
#0  runtime_netpoll (block=block@entry=0 '\000')
    at /vol/gcc/src/hg/trunk/solaris/libgo/runtime/netpoll_select.c:153
#1  0xfffffffd591bcd6c in sysmon ()
    at /vol/gcc/src/hg/trunk/solaris/libgo/runtime/proc.c:2707
#2  0xfffffffd591bb3a8 in runtime_mstart (mp=0xc210212000)
    at /vol/gcc/src/hg/trunk/solaris/libgo/runtime/proc.c:1016
#3  0xffffffff7ede276c in _lwp_start () from /lib/64/libc.so.1
#4  0xffffffff7ede276c in _lwp_start () from /lib/64/libc.so.1
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) p timeout
Cannot access memory at address 0xffffffff71cfbd50

I have no idea what might be wrong; the same tests works perfectly fine for
32-bit.

  Rainer