I recently tried the regression tests for the ksh debugger on Ubuntu (Lucid)
and have gotten SEGVs on every recent version I tried. Specifically
1. The version that comes with Ubuntu: 2009-05-01,
2. 2010-03-09 for which i can get a linux.i386 binary,
3. 2010-06-21 which I built from source (using ./bin/package make)
Here is how to reproduce on Ubuntu
git clone git://github.com/rocky/kshdb.git
cd kshdb
./autogen.sh
make && make check
This will run a number of tests and it gives SEGVs on two or three
integration tests. To narrow to run just one of the SEGV'd tests:
$ cd test/integration:
> ksh -- ../../kshdb -L ../.. -n -B -q -x ../../test/data/list.cmd
> ../../test/example/dbg-test1.sh
> (dbg-test1.sh:22):
> x=22
> +# Test of debugger 'list' command
> +#
> +help l
> list [LOC|.|-] [COUNT] -- List COUNT lines of a script starting from LOC
>
> START is the starting location or dot (.) for current file and
> line. Subsequent list commands continue from the last line
> listed. Frame switching however resets the line to dot.
>
> If COUNT is omitted, use the setting LISTSIZE. Use "set listsize" to
> change this setting.
>
> Aliases for list: l
> +### List default location
> +list
> 22: => x=22
> 23: y=23
> 24: for i in 0 1 3 ; do
> 25: ((x += i))
> 26: done
> 27: x=27
> 28: y=b
> 29: x=29
> 30: echo $(fn3 30)
> 31: fn3 31
> +### Should list next sets of lines
> +list
> 32: fn1;
> 33: fn3 33
> 34: # source example/dbg-test1.sub
> 35: exit 0;
> discipline not replaced
> 36:
> +list
> discipline not replaced
> 36:
> +list
> Segmentation fault
> $
>
Running ksh under gdb, after the above output I get:
Program received signal SIGSEGV, Segmentation fault.
> 0x0000002d in ?? ()
> (gdb) where
> #0 0x0000002d in ?? ()
> #1 0x080594a2 in nv_putv ()
> #2 0x080621b5 in array_putval ()
> #3 0x080594a2 in nv_putv ()
> #4 0x0807f3e3 in nv_putval ()
> #5 0x08060612 in nv_setvec ()
> #6 0x0808391f in nv_setlist ()
> #7 0x08096adc in sh_exec ()
> #8 0x0809bf3c in sh_eval ()
> #9 0x080a7516 in b_eval ()
> #10 0x08097307 in sh_exec ()
> #11 0x08098ac2 in sh_exec ()
> #12 0x080a7167 in b_dot_cmd ()
> #13 0x0809b5ad in sh_funct ()
> #14 0x08097887 in sh_exec ()
> #15 0x08098ac2 in sh_exec ()
> #16 0x080a7167 in b_dot_cmd ()
> #17 0x0809b5ad in sh_funct ()
> #18 0x08097887 in sh_exec ()
> #19 0x08098ac2 in sh_exec ()
> #20 0x08099834 in sh_exec ()
> #21 0x08098ac2 in sh_exec ()
> #22 0x080a7167 in b_dot_cmd ()
> #23 0x0809b5ad in sh_funct ()
> #24 0x08097887 in sh_exec ()
> #25 0x08098ac2 in sh_exec ()
> #26 0x080992ef in sh_exec ()
> #27 0x08098ac2 in sh_exec ()
> #28 0x080992ef in sh_exec ()
> #29 0x08098ac2 in sh_exec ()
> #30 0x0809b1bc in sh_funscope ()
> #31 0x0809b5ee in sh_funct ()
> #32 0x08097887 in sh_exec ()
> #33 0x08098ac2 in sh_exec ()
> #34 0x080a7167 in b_dot_cmd ()
> #35 0x0809b5ad in sh_funct ()
> #36 0x08097887 in sh_exec ()
> #37 0x08098ac2 in sh_exec ()
> #38 0x0809960f in sh_exec ()
> #39 0x08098ac2 in sh_exec ()
> #40 0x0809b1bc in sh_funscope ()
> #41 0x0809b5ee in sh_funct ()
> #42 0x08097887 in sh_exec ()
> #43 0x0809bf3c in sh_eval ()
> #44 0x080657e6 in sh_trap ()
> #45 0x08095b4e in sh_debug ()
> #46 0x0808417a in nv_setlist ()
> #47 0x08096adc in sh_exec ()
> #48 0x08098ac2 in sh_exec ()
> #49 0x0809bf3c in sh_eval ()
> #50 0x080a71fb in b_dot_cmd ()
> #51 0x08097307 in sh_exec ()
> #52 0x08098adf in sh_exec ()
> #53 0x0809bf3c in sh_eval ()
> #54 0x080a7516 in b_eval ()
> #55 0x08097307 in sh_exec ()
> #56 0x08098ac2 in sh_exec ()
> #57 0x080992ef in sh_exec ()
> #58 0x08057e23 in exfile ()
> #59 0x080587fe in sh_main ()
> #60 0x08057223 in main ()
> (gdb) quit
>
> If debugging locations are desired, remind me how I built do get that.
Thanks.
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