CC core dumping with CLANG 3.7 on armv5 - DREAMPLUG [ jemalloc failures ]

[Sean Bruno]

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On 10/21/15 23:50, Mattia Rossi wrote:
> Hi all again, does anyone know what might be going on regarding
> the error below? Unfortunately I can't build clang with debugging
> symbols, as it fails because I run out of swap. As this means that
> I ahve to repartition and rebuild my build system and that's going
> to take awhile until I find the time to get around to do that, I
> have no additional information in the meantime...
> 
> Cheers,
> 
> Mat

This is a bit of a "thread stealing" email here.  I'm starting Tier-2
builds for this architecture and have found that jemalloc is not happy
with this target.  It might be related, but I'm unsure.

http://tasty.ysv.freebsd.org/build.html?mastername=11arm-default&build=2015-11-01_18h49m25s

Specifically, I see a failure patten in jemalloc that yeilds error
messages like:

<jemalloc>:
/usr/local/poudriere/jails/11arm/usr/src/lib/libc/../../contrib/jemalloc/include/jemalloc/internal/arena.h:715:
Failed assertion: "binind < NBINS || binind == BININD_INVALID"

or

<jemalloc>:
/usr/local/poudriere/jails/11arm/usr/src/lib/libc/../../contrib/jemalloc/include/jemalloc/internal/arena.h:1217:
Failed assertion: "arena_mapbits_allocated_get(chunk, pageind) != 0"


These builds are done via the newly implemented qemu-user-static
support for armv4/5, so it may be related to something unimplemented.
 But I haven't dug into this any further.

sean


> 
>> 
>> since CLANG was upgraded  to 3.7 I'm not abel to compile anything
>> on my Dreamplug anymore:
>> 
>> FreeBSD clang version 3.7.0 (tags/RELEASE_370/final 246257)
>> 20150906 Target: arm--freebsd11.0-gnueabi Thread model: posix 
>> configure:3562: $? = 0 configure:3551: cc -v >&5 FreeBSD clang
>> version 3.7.0 (tags/RELEASE_370/final 246257) 20150906 Target:
>> arm--freebsd11.0-gnueabi Thread model: posix configure:3562: $? =
>> 0 configure:3551: cc -V >&5 cc: error: argument to '-V' is
>> missing (expected 1 value) cc: error: no input files 
>> configure:3562: $? = 1 configure:3551: cc -qversion >&5 cc:
>> error: unknown argument: '-qversion' cc: error: no input files 
>> configure:3562: $? = 1 configure:3582: checking whether the C
>> compiler works configure:3604: cc    conftest.c  >&5 cc: error:
>> unable to execute command: Bus error (core dumped) cc: error:
>> clang frontend command failed due to signal (use -v to see 
>> invocation)
>> 
>> Unfortunately I don't have any debugging symbols enabled in world
>> (yet - it's compiling), only in the kernel, so I can't get a
>> proper backtrace:
>> 
>> root at dreamplug:~ # gdb /usr/bin/cc cc.core GNU gdb 6.1.1
>> [FreeBSD] Copyright 2004 Free Software Foundation, Inc. GDB is
>> free software, covered by the GNU General Public License, and
>> you are welcome to change it and/or distribute copies of it under
>> certain conditions. Type "show copying" to see the conditions. 
>> There is absolutely no warranty for GDB.  Type "show warranty"
>> for details. This GDB was configured as
>> "arm-marcel-freebsd"...(no debugging symbols found)... Core was
>> generated by `cc'. Program terminated with signal 10, Bus error. 
>> #0  0x01eb0868 in ?? () (gdb) bt #0  0x01eb0868 in ?? () (gdb)
>> 
>> Does anyone have similar probelms or know a solution to that?
>> 
>> Please con't tell me that nobody is using armv5 anymore and I
>> should change to a RPi or so :-(
>> 
>> Cheers,
>> 
>> Mat
> 
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