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| author |  René Scharfe <l.s.r@web.de> | 2018-09-03 14:49:26 +0000 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2018-09-12 15:17:46 -0700 |
| commit | fb8952077dfa11dc1534b5a9d965cbb39b043af4 (patch) | |
| tree | 1e74f03fc2f30fa0c7babf057a8be52b192155dd /t | |
| parent | fsck: add a performance test for skipList (diff) | |
| download | tgif-fb8952077dfa11dc1534b5a9d965cbb39b043af4.tar.xz | |
fsck: use strbuf_getline() to read skiplist file
The buffer is unlikely to contain a NUL character, so printing its
contents using %s in a die() format is unsafe (detected with ASan).
Use an idiomatic strbuf_getline() loop instead, which ensures the buffer
is always NUL-terminated, supports CRLF files as well, accepts files
without a newline after the last line, supports any hash length
automatically, and is shorter.
This fixes a bug where emitting an error about an invalid line on say
line 1 would continue printing subsequent lines, and usually continue
into uninitialized memory.
The performance impact of this, on a CentOS 7 box with RedHat GCC
4.8.5-28:
$ GIT_PERF_REPEAT_COUNT=5 GIT_PERF_MAKE_OPTS='-j56 CFLAGS="-O3"' ./run HEAD~ HEAD p1451-fsck-skip-list.sh
Test HEAD~ HEAD
----------------------------------------------------------------------------------------
1450.3: fsck with 0 skipped bad commits 7.75(7.39+0.35) 7.68(7.29+0.39) -0.9%
1450.5: fsck with 1 skipped bad commits 7.70(7.30+0.40) 7.80(7.42+0.37) +1.3%
1450.7: fsck with 10 skipped bad commits 7.77(7.37+0.40) 7.87(7.47+0.40) +1.3%
1450.9: fsck with 100 skipped bad commits 7.82(7.41+0.40) 7.88(7.43+0.44) +0.8%
1450.11: fsck with 1000 skipped bad commits 7.88(7.49+0.39) 7.84(7.43+0.40) -0.5%
1450.13: fsck with 10000 skipped bad commits 8.02(7.63+0.39) 8.07(7.67+0.39) +0.6%
1450.15: fsck with 100000 skipped bad commits 8.01(7.60+0.41) 8.08(7.70+0.38) +0.9%
1450.17: fsck with 1000000 skipped bad commits 7.60(7.10+0.50) 7.37(7.18+0.19) -3.0%
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 't')
| -rwxr-xr-x | t/t5504-fetch-receive-strict.sh | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/t/t5504-fetch-receive-strict.sh b/t/t5504-fetch-receive-strict.sh index 96bf9facbd..d67ab37321 100755 --- a/t/t5504-fetch-receive-strict.sh +++ b/t/t5504-fetch-receive-strict.sh @@ -185,7 +185,7 @@ test_expect_success 'fsck with invalid or bogus skipList input (comments & empty test_i18ngrep "^fatal: Invalid SHA-1: " err-with-empty-line ' -test_expect_failure 'fsck no garbage output from comments & empty lines errors' ' +test_expect_success 'fsck no garbage output from comments & empty lines errors' ' test_line_count = 1 err-with-comment && test_line_count = 1 err-with-empty-line ' |