[M3devel] cm3 is broken

[Rodney M. Bates]

On 08/20/2015 06:32 PM, Antony Hosking wrote:
> cm3 should build with static link to m3core so as to allow backup as you describe.
> Did this change recently?

Apparently it is now dynamic, as I see libm3core.so.5 in the backtrace.  Also, setting
a breakpoint at one of these places gives:


(m3gdb) b RTExFrame.m3:175
No source file named RTExFrame.m3.
Make breakpoint pending on future shared library load? (y or [n]) y
Breakpoint 1 (RTExFrame.m3:175) pending.
(m3gdb) run

........

Breakpoint 2 at 0x7f446c889043: file ../src/runtime/ex_frame/RTExFrame.m3, line 175.
Pending breakpoint "RTExFrame.m3:175" resolved



>
>> On Aug 21, 2015, at 3:19 AM, Jay <jay.krell at cornell.edu> wrote:
>>
>> Upgrade is failing because cm3 is already broken. I can see about making the error clearer.
>>
>>
>> I often upgrade.py nocleangcc to speed it up.
>>
>>
>> Right, backup must include libm3 m3core cm3cg cm3 config. See capture-min or capture-boot, I think I settled on capture-min.
>>
>>
>> m3cc either needs to keep the "front" tag or the scripts need to mention it explicitly. You can't safely always skip it.
>>
>>
>> Do you have recourse?
>> Old release maybe? (Be sure to edit the 5.8.6 config to avoid new cm3cg.)
>>
>> - Jay
>>
>> On Aug 20, 2015, at 8:44 AM, "Rodney M. Bates" <rodney_bates at lcwb.coop> wrote:
>>
>>>
>>>
>>> On 08/19/2015 06:57 PM, Jay K wrote:
>>>> Did you upgrade.py? (or possibly upgrade.sh?)
>>>
>>> upgrade.py does this:
>>>
>>> rodney at allegheny:~/proj/m3/git/cm3/scripts/python$ python upgrade.py
>>> Traceback (most recent call last):
>>> File "upgrade.py", line 4, in <module>
>>>    import pylib
>>> File "/home/rodney/proj/m3/git/cm3/scripts/python/pylib.py", line 656, in <module>
>>>    if Target.startswith("NT386"):
>>> AttributeError: 'NoneType' object has no attribute 'startswith'
>>>
>>> I did 'do-cm3-front.sh' buildship' and 'install-cm3-compiler.sh upgrade',
>>> with front removed from the m3cc line in pkginfo.txt, since there were no
>>> changes to it, and it takes longer to compile than everything else combined.
>>>
>>> upgrade.sh now segfaults after cleaning things out, but that is no doubt just
>>> the now-broken cm3.
>>>
>>> I always make backup copies of cm3 & cm3cg in /usr/local/cm3/bin before installing
>>> a compiler, but restoring what I had before does not fix the problem.  I suppose
>>> it is in m3core, which I guess I need to add to my backup habit.
>>>
>>>> I changed the cm3/m3core interface, so you must do the ugprade in the usual proper order.
>>>>
>>>> I run upgrade.py frequently and recommend it.
>>>>
>>>> - Jay
>>>>
>>>>
>>>>> Date: Wed, 19 Aug 2015 17:20:25 -0500
>>>>> From: rodney_bates at lcwb.coop
>>>>> To: m3devel at elegosoft.com
>>>>> Subject: [M3devel] cm3 is broken
>>>>>
>>>>> As of a recent pull from modula3-cm3, done around 16:00 CDT, cm3 is going into
>>>>> runaway recursion trying to report a fault. This happens immediately upon
>>>>> running it, before it produces any output.
>>>>>
>>>>> Here is one cycle of the backtrace:
>>>>>
>>>>> #1745 0x00007fd9b0b0d935 in _m3_fault (arg=5600) from /usr/local/cm3-uniboot/bin/../lib/libm3core.so.5
>>>>> #1746 0x00007fd9b0b0d05d in InvokeHandler (f=16_00007fff488bcc20, a=
>>>>> RECORD exception = 16_00007fd9b0d4b780; arg = 16_000000000000001d; module = 16_00007fd9b0d62d40; line = 14; pc = NIL; info0 = NIL; info1 = NIL; un_except = NIL; un_arg = NIL; END) at ../src/runtime/ex_frame/RTExFrame.m3:175
>>>>> #1747 0x00007fd9b0b0cef1 in ResumeRaise (a=
>>>>> RECORD exception = 16_00007fd9b0d4b780; arg = 16_000000000000001d; module = 16_00007fd9b0d62d40; line = 14; pc = NIL; info0 = NIL; info1 = NIL; un_except = NIL; un_arg = NIL; END) at ../src/runtime/ex_frame/RTExFrame.m3:145
>>>>> #1748 0x00007fd9b0b0ccfe in Raise (act=
>>>>> RECORD exception = 16_00007fd9b0d4b780; arg = 16_000000000000001d; module = 16_00007fd9b0d62d40; line = 14; pc = NIL; info0 = NIL; info1 = NIL; un_except = NIL; un_arg = NIL; END) at ../src/runtime/ex_frame/RTExFrame.m3:91
>>>>> #1749 0x00007fd9b0ae9693 in Raise (ex=16_00007fd9b0d4b780, arg=16_000000000000001d, module=16_00007fd9b0d62d40, line=14)
>>>>> at ../src/runtime/common/RTHooks.m3:79
>>>>> #1750 0x00007fd9b0ae9951 in Self () at ../src/runtime/common/RuntimeError.m3:14
>>>>> #1751 0x00007fd9b0ae96ef in ReportFault (module=16_00007fd9b0d6a520, info=5600) at ../src/runtime/common/RTHooks.m3:98
>>>>> #1752 0x00007fd9b0b0d935 in _m3_fault (arg=5600) from /usr/local/cm3-uniboot/bin/../lib/libm3core.so.5
>>>>>
>>>>> So far, I haven't had the patience to keep hitting return until I get to the bottom of it.
>>>>>
>>>>> --
>>>>> Rodney Bates
>>>>> rodney.m.bates at acm.org
>>>>> _______________________________________________
>>>>> M3devel mailing list
>>>>> M3devel at elegosoft.com
>>>>> https://mail.elegosoft.com/cgi-bin/mailman/listinfo/m3devel
>>>
>>> --
>>> Rodney Bates
>>> rodney.m.bates at acm.org
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>
>

-- 
Rodney Bates
rodney.m.bates at acm.org