[Zope-dev] Core dumps - How to find out the bug?

[Dario Lopez-Kästen]

Hello!

I wonder what to do when zope coredumps?

I have been given the advice to hook up gdb to zope/python and see what
happens, but there are two problems with this:

1) I barely know gdb at all, let alone know how to hook it up to a running
process
2) The dumps happen at random (last one happened at 3 in the morning when a
co-worker was working from home).

I only have core dumps to work from. I include the stack from latest core
dump.

I am using python 2.1.2 (release), Zope2.4.3 release, RedHat Linux 7.2.
Python is compiled --without-pymalloc

What can I do more to track this down?

Thanks,

/dario

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#0  0x0806fb77 in subtract_refs (containers=0x80b228c) at
    ./Modules/gcmodule.c:170
#1  0x0806ff74 in collect (young=0x80b228c, old=0x80b2298) at
    ./Modules/gcmodule.c:382
#2  0x080701c2 in collect_generations () at
    ./Modules/gcmodule.c:479
#3  0x08070255 in _PyGC_Insert (op=0x8c1dbbc) at
    ./Modules/gcmodule.c:508
#4  0x0807eb8e in PyMethod_New (func=0x82fa3dc, self=0x8c1d50c,
    class=0x82f9f14) at Objects/classobject.c:1834
#5  0x0807c74c in instance_getattr2 (inst=0x8c1d50c,
    name=0x8168e00) at Objects/classobject.c:642
#6  0x0807c67e in instance_getattr1 (inst=0x8c1d50c,
    name=0x8168e00) at Objects/classobject.c:608
#7  0x0807c789 in instance_getattr (inst=0x8c1d50c,
    name=0x8168e00) at Objects/classobject.c:656
#8  0x0808d291 in PyObject_GetAttr (v=0x8c1d50c,
    name=0x8168e00) at Objects/object.c:1052
#9  0x0809b7ba in builtin_hasattr (self=0x0, args=0x8d8cb94) at
    Python/bltinmodule.c:886
#10 0x08058df1 in call_cfunction (func=0x80c79c8, arg=0x8d8cb94,
    kw=0x0) at Python/ceval.c:2850
#11 0x080577ac in eval_code2 (co=0x82d91a0, globals=0x82ebd9c,
    locals=0x0, args=0x8a3a7e0, argcount=1, kws=0x0, kwcount=0,
    defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:1952
#12 0x080590a3 in call_eval_code2 (func=0x82f9fb4, arg=0x8a3a7d4,
    kw=0x0) at Python/ceval.c:2971
#13 0x08058ce4 in call_object (func=0x82f9fb4, arg=0x8a3a7d4,
    kw=0x0) at Python/ceval.c:2810
#14 0x08058f77 in call_method (func=0x82f9fb4, arg=0x80cb8fc,
    kw=0x0) at Python/ceval.c:2928
#15 0x08058cd1 in call_object (func=0x8b9f2dc, arg=0x80cb8fc,
    kw=0x0) at Python/ceval.c:2808
#16 0x08058bcb in PyEval_CallObjectWithKeywords (func=0x8b9f2dc,
    arg=0x80cb8fc, kw=0x0) at Python/ceval.c:2745
#17 0x0807c433 in PyInstance_New (klass=0x82f9f14, arg=0x80cb8fc,
    kw=0x0) at Objects/classobject.c:489
------
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Dario Lopez-Kästen     Systems Developer  Chalmers Univ. of Technology
dario@ita.chalmers.se  ICQ will yield no hits    IT Systems & Services