ports -r484565 : qemu-arm-static fails with: (start < end): backtrace included; start+len arithmetic overflow (abi_ulong wrap) for TARGET_FREEBSD_NR_mmap use

[Mark Millard]

On 2018-Nov-11, at 17:50, Mark Millard <marklmi at yahoo.com> wrote:

> On 2018-Nov-11, at 17:43, Kyle Evans <kevans at freebsd.org> wrote:
> 
>> On Sun, Nov 11, 2018 at 5:24 AM Mark Millard <marklmi at yahoo.com> wrote:
>>> 
>>> I attached with gdb in order to stop at the assert and look around.
>>> 
>>> 
>>> 
>>> The following is a backtrace with notes and prints mixed in:
>>> 
>>> (gdb) bt
>>> #0  thr_kill () at thr_kill.S:3
>>> #1  0x000000006028a21f in __raise (s=6) at /usr/src/lib/libc/gen/raise.c:52
>>> #2  0x0000000060204949 in abort () at /usr/src/lib/libc/stdlib/abort.c:67
>>> #3  0x000000006027855a in __assert (func=<optimized out>, file=<optimized out>, line=<optimized out>, failedexpr=<optimized out>) at /usr/src/lib/libc/gen/assert.c:51
>>> 
>>> Note end==37146624 below vs. start (37146624 will show up again in later notes)
>>> 
>>> #4  0x0000000060036243 in page_set_flags (start=4143968256, end=37146624, flags=9) at /wrkdirs/usr/ports/emulators/qemu-user-static/work/qemu-bsd-user-2cb0cdd/accel/tcg/translate-all.c:2077
>>> 
>>> Note start and len below:
>>> 
>>> #5  0x000000006003df2b in target_mmap (start=4143968256, len=188145664, prot=<optimized out>, flags=<optimized out>, fd=<optimized out>, offset=<optimized out>)
>>>   at /wrkdirs/usr/ports/emulators/qemu-user-static/work/qemu-bsd-user-2cb0cdd/bsd-user/mmap.c:626
>>> 
>>> (gdb) print/x start
>>> $5 = 0xf6fff000
>>> (gdb) print/x len
>>> $6 = 0xb36e000
>>> 
>>> Note start+len for the above (without wrapping):
>>> 
>>> (gdb) print/x (long long)start + (long long)len
>>> $10 = 0x10236d000
>>> (gdb) print (long long)start + (long long)len
>>> $11 = 4332113920
>>> 
>>> With wrapping:
>>> 
>>> (gdb) print/x start+len
>>> $8 = 0x236d000
>>> (gdb) print start+len
>>> $9 = 37146624
>>> 
>>> And there is end's value again.
>>> 
>> 
>> Hi,
>> 
>> This should be fixed as of ports r484702; please do try this and let
>> us know how it goes.
> 
> I've updated ports to -r484783 and an amd64 -> armv7
> poudriere-devel/qemu-user-static cross-build is in
> progress. devel/cmake completed fine, overall about
> 63 ports have. The 1 port failure is not tied to
> qemu-arm-static issues.
> 
> It will be hours before lang/gcc8 would finish. There
> are somewhat over 70 ports to go overall.
> 
> So far so good.
> 

lang/gcc8 (full bootstrap) and the other about 70
ports built fine.

(There was one example of the lld hang-up, for which
I used a gdb attach/detach sequence to cause the
emulated lld to continue.)


===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)