Re: current bash.git.devel segfaults on my code

[Alex fxmbsw7 Ratchev]

this is with ./bash instead of bash as valgrind arg

valgrind ./bash

==32137== Memcheck, a memory error detector
==32137== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==32137== Using Valgrind-3.17.0 and LibVEX; rerun with -h for copyright info
==32137== Command: ./bash
==32137==
==32139==
==32139== HEAP SUMMARY:
==32139==     in use at exit: 169,716 bytes in 817 blocks
==32139==   total heap usage: 2,509 allocs, 1,692 frees, 255,621 bytes
allocated
==32139==
==32139== LEAK SUMMARY:
==32139==    definitely lost: 2,040 bytes in 3 blocks
       ==32139==    indirectly lost: 0 bytes in 0 blocks
==32139==      possibly lost: 0 bytes in 0 blocks
==32139==    still reachable: 167,676 bytes in 814 blocks
==32139==         suppressed: 0 bytes in 0 blocks
==32139== Rerun with --leak-check=full to see details of leaked memory
==32139==
==32139== For lists of detected and suppressed errors, rerun with: -s
==32139== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==32143==
==32143== HEAP SUMMARY:
==32143==     in use at exit: 171,182 bytes in 846 blocks
==32143==   total heap usage: 3,232 allocs, 2,386 frees, 412,605 bytes
allocated
==32143==
==32143== LEAK SUMMARY:
==32143==    definitely lost: 2,040 bytes in 3 blocks
==32143==    indirectly lost: 0 bytes in 0 blocks
==32143==      possibly lost: 0 bytes in 0 blocks
==32143==    still reachable: 169,142 bytes in 843 blocks
==32143==         suppressed: 0 bytes in 0 blocks
==32143== Rerun with --leak-check=full to see details of leaked memory
==32143==
==32143== For lists of detected and suppressed errors, rerun with: -s
==32143== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==32150==
==32150== HEAP SUMMARY:
==32150==     in use at exit: 172,507 bytes in 870 blocks
==32150==   total heap usage: 3,960 allocs, 3,090 frees, 448,152 bytes
allocated
==32150==
==32150== LEAK SUMMARY:
==32150==    definitely lost: 2,057 bytes in 4 blocks
==32150==    indirectly lost: 0 bytes in 0 blocks
==32150==      possibly lost: 0 bytes in 0 blocks
==32150==    still reachable: 170,450 bytes in 866 blocks
==32150==         suppressed: 0 bytes in 0 blocks
==32150== Rerun with --leak-check=full to see details of leaked memory
==32150==
==32150== For lists of detected and suppressed errors, rerun with: -s
==32150== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==32154==
==32154== HEAP SUMMARY:
==32154==     in use at exit: 724,053 bytes in 2,309 blocks
==32154==   total heap usage: 6,432 allocs, 4,123 frees, 1,036,422 bytes
allocated
==32154==
==32154== LEAK SUMMARY:
==32154==    definitely lost: 2,040 bytes in 3 blocks
==32154==    indirectly lost: 0 bytes in 0 blocks
==32154==      possibly lost: 0 bytes in 0 blocks
==32154==    still reachable: 722,013 bytes in 2,306 blocks
==32154==         suppressed: 0 bytes in 0 blocks
==32154== Rerun with --leak-check=full to see details of leaked memory
==32154==
==32154== For lists of detected and suppressed errors, rerun with: -s
==32154== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==32158==
==32158== HEAP SUMMARY:
==32158==     in use at exit: 723,302 bytes in 2,252 blocks
==32158==   total heap usage: 7,070 allocs, 4,818 frees, 1,290,142 bytes
allocated
==32158==
==32158== LEAK SUMMARY:
==32158==    definitely lost: 2,040 bytes in 3 blocks
==32158==    indirectly lost: 0 bytes in 0 blocks
==32158==      possibly lost: 0 bytes in 0 blocks
==32158==    still reachable: 721,262 bytes in 2,249 blocks
==32158==         suppressed: 0 bytes in 0 blocks
==32158== Rerun with --leak-check=full to see details of leaked memory
==32158==
==32158== For lists of detected and suppressed errors, rerun with: -s
==32158== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==32165==
==32165== HEAP SUMMARY:
==32165==     in use at exit: 723,046 bytes in 2,255 blocks
==32165==   total heap usage: 7,765 allocs, 5,510 frees, 1,323,038 bytes
allocated
==32165==
==32165== LEAK SUMMARY:
==32165==    definitely lost: 2,057 bytes in 4 blocks
==32165==    indirectly lost: 0 bytes in 0 blocks
==32165==      possibly lost: 0 bytes in 0 blocks
==32165==    still reachable: 720,989 bytes in 2,251 blocks
==32165==         suppressed: 0 bytes in 0 blocks
==32165== Rerun with --leak-check=full to see details of leaked memory
==32165==
==32165== For lists of detected and suppressed errors, rerun with: -s
==32165== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==32171==
==32171== HEAP SUMMARY:
==32171==     in use at exit: 776,677 bytes in 4,059 blocks
==32171==   total heap usage: 14,294 allocs, 10,235 frees, 1,578,047 bytes
allocated
==32171==
==32171== LEAK SUMMARY:
==32171==    definitely lost: 2,040 bytes in 3 blocks
==32171==    indirectly lost: 0 bytes in 0 blocks
==32171==      possibly lost: 0 bytes in 0 blocks
==32171==    still reachable: 774,637 bytes in 4,056 blocks
==32171==         suppressed: 0 bytes in 0 blocks
==32171== Rerun with --leak-check=full to see details of leaked memory
==32171==
==32171== For lists of detected and suppressed errors, rerun with: -s
==32171== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
0 exit // 2 old , static

2021-10-14 , Thu Oct , 08:47:11.167010 == 1634201231.167010
# root:0:0 # @ /dev/pts/0 ( 0 ) -> /root/b1

support/ builtins/ po/ doc/ autom4te.cache/ .git/ tests/ m4/ lib/ include/
.made xmalloc.o syntax.o pcomplib.o pcomplete.o redir.o findcmd.o locale.o
bashbug* bash* mksignames* bashversion* mksyntax* config.status* configure*


exit
==32137==
==32137== HEAP SUMMARY:
==32137==     in use at exit: 892,893 bytes in 4,237 blocks
==32137==   total heap usage: 15,210 allocs, 10,973 frees, 1,722,069 bytes
allocated
==32137==
==32137== LEAK SUMMARY:
==32137==    definitely lost: 2,040 bytes in 3 blocks
       ==32137==    indirectly lost: 0 bytes in 0 blocks
==32137==      possibly lost: 0 bytes in 0 blocks
==32137==    still reachable: 890,853 bytes in 4,234 blocks
       ==32137==         suppressed: 0 bytes in 0 blocks
==32137== Rerun with --leak-check=full to see details of leaked memory
      ==32137==
==32137== For lists of detected and suppressed errors, rerun with: -s
       ==32137== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0
from 0)

On Wed, Oct 13, 2021, 15:27 Chet Ramey <chet.ramey@case.edu> wrote:

> On 10/12/21 9:15 PM, Alex fxmbsw7 Ratchev wrote:
> > could you give me maybe good urls about such to learn ( maybe not too
> long
> > ones .. ) ?
>
> You should, with a current bash devel, just be able to run
>
> make clean
> make valgrind
>
> That disables some bash malloc wrapping functions that confuse valgrind
> severely. Then just run
>
> valgrind bash
> or
> valgrind --leak-check=full bash
>
> and see what you get. (Assuming you have valgrind installed, of course, and
> depending on what you want to find out).
>
> If you want to try address sanitizer, make sure you have a compiler that
> supports it, then run
>
> make clean
> make asan
>
> I put the shorthand targets in for convenience. Once you build a bash with
> address sanitizer support, you just have to run it and see what it reports.
>
> Chet
>
> --
> ``The lyf so short, the craft so long to lerne.'' - Chaucer
>                  ``Ars longa, vita brevis'' - Hippocrates
> Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/
>