Re: port binary dumping core on recent head in poudriere

On 24/11/24 18:18, Dimitry Andric wrote:
> On 24 Nov 2024, at 18:07, Guido Falsi <mad@madpilot.net> wrote:
>>
>> On 23/11/24 15:56, Guido Falsi wrote:
>>> On 23/11/24 15:34, Guido Falsi wrote:
>>>> On 21/11/24 18:33, Guido Falsi wrote:
>>>>> On 21/11/24 18:27, Dimitry Andric wrote:
>>>>>> On 21 Nov 2024, at 18:17, Guido Falsi <mad@madpilot.net> wrote:
>>>>>>>
>>>>>>> On 20/11/24 23:50, Guido Falsi wrote:
>>>>>>>> On 20/11/24 22:14, Dimitry Andric wrote:
>>>>>>>>> On 20 Nov 2024, at 18:32, Guido Falsi <mad@madpilot.net> wrote:
>>>>>>>>>> I've noticed that recently some ports are dumping core during builds of dependencies in head in poudriere.
>>>>>>>>>>
>>>>>>>>>> I'm seeing this for example with sassc crashing while trying to build x11-themes/greybird-theme.
>>>>>>>>>>
>>>>>>>>>> My first suspect was the llvm upgrade in head, but forcing sassc and libsass to build with older clang via USES=llvm:max=18 is not helping.
>>>>>>>>>>
>>>>>>>>>> I did recompile the offending programs with debug and tried a backtrace and got this:
>>>>>>>>>>
>>>>>>>>>> ```
>>>>>>>>>> (lldb) bt
>>>>>>>>>> * thread #1, name = 'sassc', stop reason = signal SIGSEGV: invalid permissions for mapped object (fault address: 0x82374a000)
>>>>>>>>>>     * frame #0: 0x000000082374a000 libsass.so.1
>>>>>>>>>>       frame #1: 0x0000000823865a86 libsass.so.1`_GLOBAL__sub_I_ast.cpp [inlined] double std::__1::__math::acos[abi:se190102]<int, 0>(__x=-1) at inverse_trigonometric_functions.h:40:10
>>>>>>>>>>       frame #2: 0x0000000823865a81 libsass.so.1`_GLOBAL__sub_I_ast.cpp [inlined] __cxx_global_var_init at units.hpp:11:21
>>>>>>>>>>       frame #3: 0x0000000823865a81 libsass.so.1`_GLOBAL__sub_I_ast.cpp at ast.cpp:0
>>>>>>>>>>       frame #4: 0x00001eac6e3f078d ld-elf.so.1
>>>>>>>>>>       frame #5: 0x00001eac6e3ef349 ld-elf.so.1
>>>>>>>>>>       frame #6: 0x00001eac6e3ec099 ld- elf.so.1`___lldb_unnamed_symbol27 + 25
>>>>>>>>>> ```
>>>>>>>>>>
>>>>>>>>>> which points me to this upstream line of code: https:// github.com/ sass/libsass/ blob/7037f03fabeb2b18b5efa84403f5a6d7a990f460/src/ units.hpp#L11
>>>>>>>>>>
>>>>>>>>>> I could change the way it derives PI, but I'm not sure this is the correct fix.
>>>>>>>>>
>>>>>>>>> At first sight this looks like some sort of initialization order fiasco, but without a full backtrace and some indications on what it is exactly segfaulting on it is hard to say. Is it reproducible?
>>>>>>>> It is fully reproducible here by just compiling the sassc port and trying to run it. It segfaults on startup.
>>>>>>>
>>>>>>> I'm following up to myself to note that I'm observing the same issue in textproc/opensp if trying to run anything linked with the library, for example its own binary "osx".
>>>>>>>
>>>>>>> I noticed it because it is required by libosp and then by gnucash which I use and maintain. libosp fails during configure due to a test binary compiled by configure script dumping core.
>>>>>>>
>>>>>>> I suspect there are more around the ports tree.
>>>>>>
>>>>>> I cannot reproduce this at all. For me the sassc binary runs fine, and also the x11-themes/greybird-theme port builds fine. Then again, my base system is probably older than yours? Which revision are you running?
>>>>>
>>>>> I'm running cdfd0600dc8882f0a0d0e6d9a1cdcf926edba6d6 from Tue Nov 5 13:35:17 2024 -0800 (cut & paste from git log)
>>>>>
>>>>>
>>>>
>>>> I tried upgrading to 07593d13fa2ad6fe4d962b7473c6020aef2a0414 from yesterday, cleaning all ports, forcing a rebuild, but I see the exact same issue.
>>>>
>>> In fact, I noticed, guile2 is also showing this behaviour.
>>
>> I've tried some more experiments, to rule out some possibilities on my part:
>>
>> - rebuild from scratch clening up obj, ccache
>> - I also tried rolling back a pair of commits in the dynamic loader, just in case
>> - update to a newer snapshot [1], since I noticed a new version of clang is included.
>>
>> Unluckily nothing of this worked, and the issue is presenting itself constantly.
>>
>> I must admit I'm out of ideas, although I still think some issue in the llvm suite looks the most probable cause, but I admit it is just an hunch feeling I cannot really back up with any proof.
>>
>>
>> I really hope something is uncovered about this.
>>
>> Should I create a bug report on bugzilla to track this?
>>
>>
>> [1] now testing with commit 718519f4efc71096422fc71dab90b2a3369871ff from Sun Nov 24 10:04:11 2024 +0100
> 
> Probably best to create a bugzilla ticket, but as I said before, I cannot reproduce this. So you would have to come up with some scenario on why it is reproducible for you, but not for other people. :)
> 
> For example, do you use any particular make.conf or src.conf settings? CPUTYPE? That kind of thing, anything that is non-default.
> 

I did try clearing ccache and usr/obj just to make sure those were not 
involved.

I actually use CPUTYPE?= x86-64-v2 which I did not think about. I'll try 
removing that and see if anything changes.

Apart from this I don't see anything relevant, anyway I'll try to at 
least do my homework.

-- 
Guido Falsi <mad@madpilot.net>