gc_massacre branch is ready for testing.

James E Keenan jkeen at verizon.net
Wed Sep 22 00:34:22 UTC 2010


James E Keenan wrote:
> Vasily Chekalkin wrote:
>  > Hello.
>  >
>  > I would like to declare gc_massacre branch ready to merge back to
>  > trunk. It's not perfect, but I like it more than current GC.
>
> bacek,
>
> Thanks for all your hard work on this branch.
>
> Unfortunately, I have to report a rather tricky bug. I have tested the
> gc_massacre branch so far on two different Linux/i386 machines. On one
> of them, t/pmc/filehandle.t runs without incident. However, on the other
> -- my main box for testing Parrot -- I get this error:
>
> $ prove -v t/pmc/filehandle.t
> t/pmc/filehandle.t ..
> 1..23
> ok 1 - new
> ...
> ok 21 - exit status
> not ok 22 - timely destruction
>
> # Failed test 'timely destruction'
> # at t/pmc/filehandle.t line 739.
> # got: ''
> # expected: 'a line
> # '
> ok 23 - get_bool
> # Looks like you failed 1 test of 23.
> Dubious, test returned 1 (wstat 256, 0x100)
> Failed 1/23 subtests
> (less 1 skipped subtest: 21 okay)
>
> Test Summary Report
> -------------------
> t/pmc/filehandle.t (Wstat: 256 Tests: 23 Failed: 1)
> Failed test: 22
> Non-zero exit status: 1
> Files=1, Tests=23, 0 wallclock secs ( 0.02 usr 0.01 sys + 0.34 cusr 0.16
> csys = 0.53 CPU)
> Result: FAIL
>
> I get the same result during 'make test' and 'perl t/harness --gc-debug
> t/pmc/filehandle.t'.
>
> When I ran this code through 'gdb', this was the result:

chromatic noted on IRC that I was misunderstanding how to run 'gdb' -- 
and that, lacking a crash, I didn't really need to run it at all.  In 
any event, here's a better usage:

linux/i386

  $ gdb ./parrot
GNU gdb 6.8-debian
...
This GDB was configured as "i486-linux-gnu"...
(gdb) run t/pmc/filehandle_22.pir
Starting program: /home/jimk/work/gc_massacre/parrot t/pmc/filehandle_22.pir
[Thread debugging using libthread_db enabled]
warning: Lowest section in /usr/lib/libicudata.so.36 is .hash at 000000b4

Program exited normally.

darwin/ppc

$ gdb ./parrot
GNU gdb 6.1-20040303 (Apple version gdb-437) (Sun Dec 25 08:31:29 GMT 2005)
...
This GDB was configured as "powerpc-apple-darwin"...Reading symbols for 
shared libraries ......... done

(gdb) run t/pmc/filehandle_22.pir
Starting program: /Users/jimk/work/gc_massacre/parrot 
t/pmc/filehandle_22.pir
Reading symbols for shared libraries .+.......++.+ done

Program exited normally.


So, 'gdb' doesn't shed any light on the problem I'm experiencing on one 
of two linux/i386 boxes and on Darwin/PPC.

Thank you very much.
kid51



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