Hi all, I have a bash script that runs as a daemon so it never exits, and its memory consumption when run under bash 4.3.x (as reported as RSS by ps) keeps increasing over time, apparently without any bound (starts at 3 MB and I've seen it reach 40 MB and still growing.) The memory consumption of the same daemon script run under bash 4.2.x is steady. I also tested a recent devel branch snapshot (bash-20150529) and there is no memory increase there either. So the leak must have been introduced during development between the 4.2 and 4.3 branches, and fixed during development of between the 4.3 and upcoming 4.4 branches.
I would have bisected it, however I can't make much sense of the branches in the git repository. Apparently snapshots are imported into the devel branch from another source, so bisecting wouldn't lead to an individual commit. Also I couldn't figure out which devel snapshots (if any) correspond to versions 4.2.0 and 4.3.0 respectively so I don't know where to start bisecting. I built bash 4.3.39 with --without-bash-malloc and then ran the daemon under valgrind for 1 minute. The back trace for the leak is: 3,973 bytes in 430 blocks are definitely lost in loss record 1,610 of 1,613 at 0x4C277AB: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) by 0x471A2A: xmalloc (xmalloc.c:112) by 0x461A84: array_variable_name (arrayfunc.c:917) by 0x457731: parameter_brace_expand_word (subst.c:5785) by 0x452DA4: param_expand (subst.c:7385) by 0x4550E9: expand_word_internal (subst.c:8393) by 0x4566DB: call_expand_word_internal.constprop.14 (subst.c:3299) by 0x456829: expand_string_assignment (subst.c:3387) by 0x4509DB: expand_string_if_necessary (subst.c:3092) by 0x450E3E: do_assignment_internal (subst.c:2823) by 0x45859E: expand_word_list_internal (subst.c:2912) by 0x4360B7: execute_simple_command (execute_cmd.c:4000) I do not have a minimum test case yet, but I wanted to ask if the back trace above provides enough hints to recognize an already know bug and the commit that fixed it? Thanks, -- Jean Delvare SUSE L3 Support
