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[Valgrind-developers] Shell fails when under valgrind-3.7.0's control with "--tool=none" ? ... / was: Fwd: ast-ksh.2012-05-18 failures in "arith.sh" when under valgrind control...
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From: Roland M. <rol...@nr...> - 2012-06-27 13:03:51
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Hi! ---- Does anyone remember any reasons why an application under control of $ valgrind --tool=none ... # can fail (valgrind version is 3.7.0)? We're seeing the following failures (test script attached as "ksh_valgrind_arith_sh_compound_var_arithmetic_failed.sh.txt") with recent ksh93 versions and I'm not sure why it even fails with "--tool=none" (if I remember it right applications should never fail with --tool=none unless it's a valgrind bug... right ?) ... Steps to reproduce: -- snip -- $ wget --http-user="I accept www.opensource.org/licenses/eclipse" --http-passwd="." 'http://www.research.att.com/sw/download/beta/INIT.2012-06-26.tgz' $ wget --http-user="I accept www.opensource.org/licenses/eclipse" --http-passwd="." 'http://www.research.att.com/sw/download/beta/ast-ksh.2012-06-26.tgz' $ gunzip -c <INIT.2012-06-26.tgz | tar -xf - $ gunzip -c <ast-ksh.2012-06-26.tgz | tar -xf - $ CC='gcc -g -ggdb -fno-builtin' ./bin/package make 2>&1 | tee -a buildlog.log $ cd arch/*/bin $ valgrind --tool=none ./ksh valgr_ksh_cmdsubfail.sh ==23175== Nulgrind, the minimal Valgrind tool ==23175== Copyright (C) 2002-2011, and GNU GPL'd, by Nicholas Nethercote. ==23175== Using Valgrind-3.7.0 and LibVEX; rerun with -h for copyright info ==23175== Command: /home/test001/bin/ksh valgr_ksh_cmdsubfail.sh ==23175== ==23178== compound var arithmetic failed, expected '( bar=2 baz=3 foo=1 )', got '' ==23179== compound var arithmetic failed, expected '( faz=0 )', got '' ==23180== compound var arithmetic failed, expected '( foz=777 )', got '' ==23181== compound var arithmetic failed, expected '( foz=777 )', got '' ==23182== compound var arithmetic failed, expected '( fuz=777 )', got '' ==23183== compound var arithmetic failed, expected 0, got '' ==23184== compound var arithmetic failed, expected 0, got '' ==23175== -- snip -- Any ideas/clues/etc. would be welcome... ---- Bye, Roland ---------- Forwarded message ---------- From: Roland Mainz <rol...@nr...> Date: Sun, May 27, 2012 at 12:25 AM Subject: ast-ksh.2012-05-18 failures in "arith.sh" when under valgrind control... To: ast...@re... Hi! ---- Attached (as "ksh_valgrind_arith_sh_compound_var_arithmetic_failed.sh.txt") is a test script (derived from the "arith.sh" test module) which fails when running ast-ksh.2012-05-18 on SuSE 12.1/AMD64 under valgrind control like this: -- snip -- $ valgrind --trace-children=yes --log-file=/dev/null ksh xxx.sh compound var arithmetic failed, expected '( bar=2 baz=3 foo=1 )', got '' compound var arithmetic failed, expected '( faz=0 )', got '' compound var arithmetic failed, expected '( foz=777 )', got '' compound var arithmetic failed, expected '( foz=777 )', got '' compound var arithmetic failed, expected '( fuz=777 )', got '' compound var arithmetic failed, expected 0, got '' compound var arithmetic failed, expected 0, got '' -- snip -- Note that "valgrind" does not report any hits... the example uses --log-file=/dev/null only to avoid noise in this example. I assume this is a bug (and not something caused by valgrinds interference with fd usage) because if I change the script and uncomment the line containing the '#force_subshell_fork="ulimit -c 0"' (the use of "ulimit -c 0" in a subshell will trigger a |fork()| to make sure this subshell really runs in a seperate process (this is neccesary since calls to "ulimit" can't be undone)) the script works. ---- Bye, Roland -- __ . . __ (o.\ \/ /.o) rol...@nr... \__\/\/__/ MPEG specialist, C&&JAVA&&Sun&&Unix programmer /O /==\ O\ TEL +49 641 3992797 (;O/ \/ \O;) -- __ . . __ (o.\ \/ /.o) rol...@nr... \__\/\/__/ MPEG specialist, C&&JAVA&&Sun&&Unix programmer /O /==\ O\ TEL +49 641 3992797 (;O/ \/ \O;) |
