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2017-06-29coccinelle: polish FREE_AND_NULL rulesLibravatar René Scharfe1-9/+1
There are two rules for using FREE_AND_NULL in free.cocci, one for pointer types and one for expressions. Both cause coccinelle to remove empty lines and even newline characters between replacements for some reason; consecutive "free(x);/x=NULL;" sequences end up as multiple FREE_AND_NULL calls on the same time. Remove the type rule, as the expression rule already covers it, and rearrange the lines of the latter to place the addition of FREE_AND_NULL between the removals, which causes coccinelle to leave surrounding whitespace untouched. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-16coccinelle: add a rule to make "expression" code use FREE_AND_NULL()Libravatar Ævar Arnfjörð Bjarmason1-0/+7
A follow-up to the existing "type" rule added in an earlier change. This catches some occurrences that are missed by the previous rule. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-16coccinelle: add a rule to make "type" code use FREE_AND_NULL()Libravatar Ævar Arnfjörð Bjarmason1-0/+8
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-11cocci: detect useless free(3) callsLibravatar René Scharfe1-0/+6
Add a semantic patch for removing checks that cause free(3) to only be called with a NULL pointer, as that must be a programming mistake. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-10-10remove unnecessary NULL check before free(3)Libravatar René Scharfe1-0/+5
free(3) handles NULL pointers just fine. Add a semantic patch for removing unnecessary NULL checks before calling this function, and apply it on the code base. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>