diff options
| author | Ævar Arnfjörð Bjarmason <avarab@gmail.com> | 2022-02-16 09:14:05 +0100 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2022-02-16 09:40:00 -0800 |
| commit | 974c919d36d944e9005def346fb363d8a83399f7 (patch) | |
| tree | 98a83211fbc6bd1991ce439b92667ae3bbda2911 | |
| parent | 2bacb8346660b54dc4440da44103a7cd3d469009 (diff) | |
| download | git-974c919d36d944e9005def346fb363d8a83399f7.tar.gz | |
date API: add and use a date_mode_release()
Fix a memory leak in the parse_date_format() function by providing a
new date_mode_release() companion function.
By using this in "t/helper/test-date.c" we can mark the
"t0006-date.sh" test as passing when git is compiled with
SANITIZE=leak, and whitelist it to run under
"GIT_TEST_PASSING_SANITIZE_LEAK=true" by adding
"TEST_PASSES_SANITIZE_LEAK=true" to the test itself.
The other tests that expose this memory leak (i.e. take the
"mode->type == DATE_STRFTIME" branch in parse_date_format()) are
"t6300-for-each-ref.sh" and "t7004-tag.sh". The former is due to an
easily fixed leak in "ref-filter.c", and brings the failures in
"t6300-for-each-ref.sh" down from 51 to 48.
Fixing the remaining leaks will have to wait until there's a
release_revisions() in "revision.c", as they have to do with leaks via
"struct rev_info".
There is also a leak in "builtin/blame.c" due to its call to
parse_date_format() to parse the "blame.date" configuration. However
as it declares a file-level "static struct date_mode blame_date_mode"
to track the data, LSAN will not report it as a leak. It's possible to
get valgrind(1) to complain about it with e.g.:
valgrind --leak-check=full --show-leak-kinds=all ./git -P -c blame.date=format:%Y blame README.md
But let's focus on things LSAN complains about, and are thus
observable with "TEST_PASSES_SANITIZE_LEAK=true". We should get to
fixing memory leaks in "builtin/blame.c", but as doing so would
require some re-arrangement of cmd_blame() let's leave it for some
other time.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rw-r--r-- | date.c | 5 | ||||
| -rw-r--r-- | date.h | 9 | ||||
| -rw-r--r-- | ref-filter.c | 1 | ||||
| -rw-r--r-- | t/helper/test-date.c | 2 | ||||
| -rwxr-xr-x | t/t0006-date.sh | 2 |
5 files changed, 18 insertions, 1 deletions
@@ -993,6 +993,11 @@ void parse_date_format(const char *format, struct date_mode *mode) die("unknown date format %s", format); } +void date_mode_release(struct date_mode *mode) +{ + free((char *)mode->strftime_fmt); +} + void datestamp(struct strbuf *out) { time_t now; @@ -50,10 +50,17 @@ const char *show_date(timestamp_t time, int timezone, const struct date_mode *mo * * When the "date_mode_type" is DATE_STRFTIME the "strftime_fmt" * member of "struct date_mode" will be a malloc()'d format string to - * be used with strbuf_addftime(). + * be used with strbuf_addftime(), in which case you'll need to call + * date_mode_release() later. */ void parse_date_format(const char *format, struct date_mode *mode); +/** + * Release a "struct date_mode", currently only required if + * parse_date_format() has parsed a "DATE_STRFTIME" format. + */ +void date_mode_release(struct date_mode *mode); + void show_date_relative(timestamp_t time, struct strbuf *timebuf); int parse_date(const char *date, struct strbuf *out); int parse_date_basic(const char *date, timestamp_t *timestamp, int *offset); diff --git a/ref-filter.c b/ref-filter.c index 3399bde932..7838bd22b8 100644 --- a/ref-filter.c +++ b/ref-filter.c @@ -1276,6 +1276,7 @@ static void grab_date(const char *buf, struct atom_value *v, const char *atomnam goto bad; v->s = xstrdup(show_date(timestamp, tz, &date_mode)); v->value = timestamp; + date_mode_release(&date_mode); return; bad: v->s = xstrdup(""); diff --git a/t/helper/test-date.c b/t/helper/test-date.c index 111071e1dd..45951b1df8 100644 --- a/t/helper/test-date.c +++ b/t/helper/test-date.c @@ -54,6 +54,8 @@ static void show_dates(const char **argv, const char *format) printf("%s -> %s\n", *argv, show_date(t, tz, &mode)); } + + date_mode_release(&mode); } static void parse_dates(const char **argv) diff --git a/t/t0006-date.sh b/t/t0006-date.sh index 794186961e..2490162071 100755 --- a/t/t0006-date.sh +++ b/t/t0006-date.sh @@ -1,6 +1,8 @@ #!/bin/sh test_description='test date parsing and printing' + +TEST_PASSES_SANITIZE_LEAK=true . ./test-lib.sh # arbitrary reference time: 2009-08-30 19:20:00 |