Subject: Re: [PATCH v2] strvec: `strvec_splice()` to a statically initialized vector

From: Junio C Hamano <[email-masked]>
Date: Wed, 04 Dec 2024 16:41:36 +0900

This is queued as rj/strvec-splice-fix, and t/unit-tests/bin/unit-tests
dies of leaks under leak-check.

$ t/unit-tests/bin/unit-tests
TAP version 13
# start of suite 1: ctype
ok 1 - ctype::isspace
ok 2 - ctype::isdigit
ok 3 - ctype::isalpha
ok 4 - ctype::isalnum
ok 5 - ctype::is_glob_special
ok 6 - ctype::is_regex_special
ok 7 - ctype::is_pathspec_magic
ok 8 - ctype::isascii
ok 9 - ctype::islower
ok 10 - ctype::isupper
ok 11 - ctype::iscntrl
ok 12 - ctype::ispunct
ok 13 - ctype::isxdigit
ok 14 - ctype::isprint
# start of suite 2: strvec
ok 15 - strvec::init
ok 16 - strvec::dynamic_init
ok 17 - strvec::clear
ok 18 - strvec::push
ok 19 - strvec::pushf
ok 20 - strvec::pushl
ok 21 - strvec::pushv
not ok 22 - strvec::splice_just_initialized_strvec
    ---
    reason: |
      String mismatch: (&vec)->v[i] != expect[i]
      'bar' != '(null)'
    at:
      file: 't/unit-tests/strvec.c'
      line: 97
      function: 'test_strvec__splice_just_initialized_strvec'
    ---
ok 23 - strvec::splice_with_same_size_replacement
ok 24 - strvec::splice_with_smaller_replacement
ok 25 - strvec::splice_with_bigger_replacement
ok 26 - strvec::splice_with_empty_replacement
ok 27 - strvec::splice_with_empty_original
ok 28 - strvec::splice_at_tail
ok 29 - strvec::replace_at_head
ok 30 - strvec::replace_at_tail
ok 31 - strvec::replace_in_between
ok 32 - strvec::replace_with_substring
ok 33 - strvec::remove_at_head
ok 34 - strvec::remove_at_tail
ok 35 - strvec::remove_in_between
ok 36 - strvec::pop_empty_array
ok 37 - strvec::pop_non_empty_array
ok 38 - strvec::split_empty_string
ok 39 - strvec::split_single_item
ok 40 - strvec::split_multiple_items
ok 41 - strvec::split_whitespace_only
ok 42 - strvec::split_multiple_consecutive_whitespaces
ok 43 - strvec::detach

=================================================================
==5178==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 192 byte(s) in 1 object(s) allocated from:
    #0 0x5600496ec825 in __interceptor_realloc (/usr/local/google/home/jch/w/git.git/t/unit-tests/bin/unit-tests+0x67825) (BuildId: 6efbef9c6f87bfa879e770b463031b396d4d5efe)
    #1 0x56004973b4cd in xrealloc /usr/local/google/home/jch/w/git.git/wrapper.c:140:8
    #2 0x560049714c6f in strvec_splice /usr/local/google/home/jch/w/git.git/strvec.c:67:3
    #3 0x5600496f0c1d in test_strvec__splice_just_initialized_strvec /usr/local/google/home/jch/w/git.git/t/unit-tests/strvec.c:96:2
    #4 0x5600496f627b in clar_run_test /usr/local/google/home/jch/w/git.git/t/unit-tests/clar/clar.c:315:3
    #5 0x5600496f46fa in clar_run_suite /usr/local/google/home/jch/w/git.git/t/unit-tests/clar/clar.c:412:3
    #6 0x5600496f43e1 in clar_test_run /usr/local/google/home/jch/w/git.git/t/unit-tests/clar/clar.c:608:4
    #7 0x5600496f4bdf in clar_test /usr/local/google/home/jch/w/git.git/t/unit-tests/clar/clar.c:651:11
    #8 0x5600496f787c in cmd_main /usr/local/google/home/jch/w/git.git/t/unit-tests/unit-test.c:42:8
    #9 0x5600496f793a in main /usr/local/google/home/jch/w/git.git/common-main.c:9:11
    #10 0x7f59ea91dc89 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16

Direct leak of 48 byte(s) in 1 object(s) allocated from:
    #0 0x5600496ec640 in __interceptor_calloc (/usr/local/google/home/jch/w/git.git/t/unit-tests/bin/unit-tests+0x67640) (BuildId: 6efbef9c6f87bfa879e770b463031b396d4d5efe)
    #1 0x5600496f4cee in clar__fail /usr/local/google/home/jch/w/git.git/t/unit-tests/clar/clar.c:687:15
    #2 0x5600496f5f25 in clar__assert_equal /usr/local/google/home/jch/w/git.git/t/unit-tests/clar/clar.c:844:3
    #3 0x5600496f0db6 in test_strvec__splice_just_initialized_strvec /usr/local/google/home/jch/w/git.git/t/unit-tests/strvec.c:97:2
    #4 0x5600496f627b in clar_run_test /usr/local/google/home/jch/w/git.git/t/unit-tests/clar/clar.c:315:3
    #5 0x5600496f46fa in clar_run_suite /usr/local/google/home/jch/w/git.git/t/unit-tests/clar/clar.c:412:3
    #6 0x5600496f43e1 in clar_test_run /usr/local/google/home/jch/w/git.git/t/unit-tests/clar/clar.c:608:4
    #7 0x5600496f4bdf in clar_test /usr/local/google/home/jch/w/git.git/t/unit-tests/clar/clar.c:651:11
    #8 0x5600496f787c in cmd_main /usr/local/google/home/jch/w/git.git/t/unit-tests/unit-test.c:42:8
    #9 0x5600496f793a in main /usr/local/google/home/jch/w/git.git/common-main.c:9:11
    #10 0x7f59ea91dc89 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16

Indirect leak of 18 byte(s) in 1 object(s) allocated from:
    #0 0x5600496ec3c6 in __interceptor_malloc (/usr/local/google/home/jch/w/git.git/t/unit-tests/bin/unit-tests+0x673c6) (BuildId: 6efbef9c6f87bfa879e770b463031b396d4d5efe)
    #1 0x7f59ea9964f9 in strdup string/strdup.c:42:15
    #2 0x296c6c756e28271f  (<unknown module>)

Indirect leak of 4 byte(s) in 1 object(s) allocated from:
    #0 0x5600496ec3c6 in __interceptor_malloc (/usr/local/google/home/jch/w/git.git/t/unit-tests/bin/unit-tests+0x673c6) (BuildId: 6efbef9c6f87bfa879e770b463031b396d4d5efe)
    #1 0x7f59ea9964f9 in strdup string/strdup.c:42:15

SUMMARY: LeakSanitizer: 262 byte(s) leaked in 4 allocation(s).