Re: [gobo-eiffel-develop] Unhandled exception from gec-compiled tests

[Colin P. A. <co...@co...>]

>>>>> "Colin" =3D=3D Colin Paul Adams <co...@co...> writes:

>>>>> "Eric" =3D=3D Eric Bezault <er...@go...> writes:
    Eric> Colin Paul Adams wrote:
    Eric> One other thing that I would be interested in, even if it
    Eric> does not crash at the same location each time, is to know at
    Eric> which stage in the execution trace the message "Unhandled
    Eric> exception" is printed.  Could you try to put a break point
    Eric> in the C code at the beginning of the C function 'GE_raise'
    Eric> and see what the execution trace looks like?
    >>>=20
    >>> How do I set a break point?

    Eric> I don't know. I guess it depends on the C debugger that is
    Eric> available under Linux. Under Windows I do that from Visual
    Eric> Studio.

    Colin> OK - I'm using gdb.

    Colin> I need to know which file to find GC_RAISE in. Is it part
    Colin> of gec or boehm?  -- Colin Adams Preston Lancashire

Never mind - when i spelt it right, gdb found it.

But it doesn't break there:

(gdb) break GE_raise
Breakpoint 1 at 0x9afba75: file gestalt_test_driver48.c, line 24535.
(gdb) run
Starting program: /home/colin/gestalt/test/gestalt_test_driver --case=3Dacc=
essor20_018_01
[Thread debugging using libthread_db enabled]
[New Thread -1209092400 (LWP 17574)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1209092400 (LWP 17574)]
GC_clear_fl_links (flp=3D0xb84ee50) at reclaim.c:469
469            *flp =3D 0;
(gdb)=20
(gdb) backtrace
#0  GC_clear_fl_links (flp=3D0xb84ee50) at reclaim.c:469
#1  0x09b02382 in GC_start_reclaim (report_if_found=3D0) at reclaim.c:504
#2  0x09b05c47 in GC_finish_collection () at alloc.c:680
#3  0x09b09415 in GC_alloc_large (lb=3D3016, k=3D1, flags=3D0) at malloc.c:=
53
#4  0x09b09719 in GC_generic_malloc (lb=3D3015, k=3D1) at malloc.c:171
#5  0x09b098ba in GC_core_malloc (lb=3D3015) at malloc.c:286
#6  0x0804ace6 in GE_ms (
    s=3D0x9b50518 "%G=EF=BF=BD%@\204\215%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=
=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=
=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=
=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\21=
0%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@=
\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=
=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=
=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=
=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=
=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=BF=BD=EF=BF=BD%@\210%G=EF=
=BF=BD%@\204\215$(CBeBeBeBeBeBeBeBeBeBeBeBeBeBeBeBeBeBeBeBeBeBeBeBeBeBeBe%G=
=EF=BF=BD%@(B\204\215%G=EF=BF=BD=EF=BF=BD%@\200%G=EF=BF=BD=EF=BF=BD%@\200%G=
=EF=BF=BD=EF=BF=BD%@\200%G=EF=BF=BD=EF=BF=BD%@\200%G=EF=BF=BD=EF=BF=BD%@\20=
0%G=EF=BF=BD=EF=BF=BD%@\200%G=EF=BF=BD=EF=BF=BD%@\200%G=EF=BF=BD=EF=BF=BD%@=
\200%G=EF=BF=BD=EF=BF=BD%@\200%G=EF=BF=BD=EF=BF=BD%@"..., c=3D3003) at gest=
alt_test_driver1.c:1882
#7  0x09afa725 in GE_const_init () at gestalt_test_driver48.c:21933
#8  0x09afba25 in main (argc=3DCannot access memory at address 0x0
) at gestalt_test_driver48.c:24448
(gdb)=20

Where next?
--=20
Colin Adams
Preston Lancashire