F21 system GCC changed to 4.9.0 prerelease

Panu Matilainen pmatilai at laiskiainen.org
Fri Apr 11 14:01:19 UTC 2014

On 04/11/2014 04:15 PM, Josh Boyer wrote:
> On Fri, Apr 11, 2014 at 5:10 AM, Jakub Jelinek <jakub at redhat.com> wrote:
>> On Fri, Apr 11, 2014 at 11:32:53AM +0300, Panu Matilainen wrote:
>>> On 04/10/2014 05:38 PM, Richard W.M. Jones wrote:
>>>> On Thu, Apr 10, 2014 at 12:23:07PM +0200, Jakub Jelinek wrote:
>>>>> To investigate runtime rather than compile time
>>>>> issues, please consider using temporarily -fsanitize=undefined and/or
>>>>> -fsanitize=address to look for undefined behavior in the packages
>>>>> you own.
>>>> Which is this in case anyone else was wondering:
>>>>    '-fsanitize=address'
>>>>       Enable AddressSanitizer, a fast memory error detector.  Memory
>>>>       access instructions will be instrumented to detect out-of-bounds
>>>>       and use-after-free bugs.  See
>>>>       <http://code.google.com/p/address-sanitizer/> for more details.
>>>>       The run-time behavior can be influenced using the 'ASAN_OPTIONS'
>>>>       environment variable; see
>>>>       <https://code.google.com/p/address-sanitizer/wiki/Flags#Run-time_flags>
>>>>       for a list of supported options.
>>> Also in case anybody else wonders about gcc failing to recognize
>>> these options, you'll need to add BuildRequires for these: libasan
>>> for -fsanitize=address and libubsan for -fsanitize=undefined (and
>>> similarly for leak and thread sanitizers )
>> Yeah.  But, note that the sanitizers are meant primarily for development,
>> not for production, and especially -fsanitize=thread and to some extent
>> -fsanitize=address aren't completely cheap, so if you do that, please do
>> so temporarily and don't forget to disable it again for production.
> Seems they were enabled for RPM in rawhide and now a mock chroot fails
> to init because RPM explodes.  This is from a noarch (which is run on
> an ARM builder) build from a scratch build.
> DEBUG util.py:331:  Executing command: ['rpm', '-Uvh', '--nodeps',
> '/builddir/build/originals/kernel-3.15.0-0.rc0.git12.1.fc21.src.rpm']
> with env {'LANG': 'en_US.UTF-8', 'TERM': 'vt100', 'SHELL':
> '/bin/bash', 'HOSTNAME': 'mock', 'PROMPT_COMMAND': 'echo -n
> "<mock-chroot>"', 'HOME': '/builddir', 'PATH':
> '/usr/bin:/bin:/usr/sbin:/sbin'}
> DEBUG util.py:281:  ==13953==AddressSanitizer CHECK failed:
> ../../../../libsanitizer/asan/asan_globals.cc:91
> "((AddrIsAlignedByGranularity(g->beg))) != (0)" (0x0, 0x0)
> DEBUG util.py:281:      #0 0xb6a6d21b (/lib/libasan.so.1+0x6121b)
> DEBUG util.py:281:      #1 0xb6a71a8b in __sanitizer::CheckFailed(char
> const*, int, char const*, unsigned long long, unsigned long long)
> (/lib/libasan.so.1+0x65a8b)
> DEBUG util.py:281:      #2 0xb6a2b01b in __asan_register_globals
> (/lib/libasan.so.1+0x1f01b)
> DEBUG util.py:281:      #3 0xb6f11877 in call_init.part.0
> (/lib/ld-linux-armhf.so.3+0x11877)
> DEBUG util.py:281:      #4 0xb6f119d3 in _dl_init
> (/lib/ld-linux-armhf.so.3+0x119d3)
> DEBUG util.py:281:      #5 0xb6f00bc3 (/lib/ld-linux-armhf.so.3+0xbc3)
> DEBUG util.py:371:  Child return code was: 1
> Full scratch build:
> http://koji.fedoraproject.org/koji/taskinfo?taskID=6727256

Oh ... ¤#%#¤%#. I realized this blows up, fired a new build to disable 
the thing again ASAP. And thought it completed okay and kinda forgot 
about it:

Built okay on everything but ARM, dunno why that is... but the buggy rpm 
needs untagging now (will do as soon as I get the expired certificate 
sorted, but if somebody beats me to it, feel free)

Apologies for the mess,

	- Panu -

> josh

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