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From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>, "Jeff King" <peff@peff.net>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Subject: [PATCH v2 5/5] date API: add and use a date_mode_release()
Date: Sat,  5 Feb 2022 00:53:06 +0100	[thread overview]
Message-ID: <patch-v2-5.5-60dbadacb16-20220204T235143Z-avarab@gmail.com> (raw)
In-Reply-To: <cover-v2-0.5-00000000000-20220204T235143Z-avarab@gmail.com>

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".

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 date.c               | 5 +++++
 date.h               | 9 ++++++++-
 ref-filter.c         | 1 +
 t/helper/test-date.c | 2 ++
 t/t0006-date.sh      | 2 ++
 5 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/date.c b/date.c
index 54c709e4a08..68a260c214d 100644
--- a/date.c
+++ b/date.c
@@ -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;
diff --git a/date.h b/date.h
index 4ed83506de9..bfcd4eb458c 100644
--- a/date.h
+++ b/date.h
@@ -49,10 +49,17 @@ 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 3399bde932f..7838bd22b8d 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 111071e1dd1..45951b1df87 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 794186961ee..2490162071e 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
-- 
2.35.1.940.ge7a5b4b05f2


  parent reply	other threads:[~2022-02-04 23:53 UTC|newest]

Thread overview: 125+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-09 14:38 UNLEAK(), leak checking in the default tests etc Ævar Arnfjörð Bjarmason
2021-06-09 17:44 ` Andrzej Hunt
2021-06-09 20:36   ` Felipe Contreras
2021-06-10 10:46   ` Jeff King
2021-06-10 10:56   ` Ævar Arnfjörð Bjarmason
2021-06-10 13:38     ` Jeff King
2021-06-10 15:32       ` Andrzej Hunt
2021-06-10 16:36         ` Jeff King
2021-06-11 15:44           ` Andrzej Hunt
2021-06-10 19:01 ` SZEDER Gábor
2021-07-14  0:11 ` [PATCH 0/4] add a test mode for SANITIZE=leak, run it in CI Ævar Arnfjörð Bjarmason
2021-07-14  0:11   ` [PATCH 1/4] tests: " Ævar Arnfjörð Bjarmason
2021-07-14  3:23     ` Đoàn Trần Công Danh
2021-07-14  0:11   ` [PATCH 2/4] SANITIZE tests: fix memory leaks in t13*config*, add to whitelist Ævar Arnfjörð Bjarmason
2021-07-14  0:11   ` [PATCH 3/4] SANITIZE tests: fix memory leaks in t5701*, " Ævar Arnfjörð Bjarmason
2021-07-14  0:11   ` [PATCH 4/4] SANITIZE tests: fix leak in mailmap.c Ævar Arnfjörð Bjarmason
2021-07-14  2:19     ` Eric Sunshine
2021-07-14 17:23   ` [PATCH v2 0/4] add a test mode for SANITIZE=leak, run it in CI Ævar Arnfjörð Bjarmason
2021-07-14 17:23     ` [PATCH v2 1/4] tests: " Ævar Arnfjörð Bjarmason
2021-07-14 18:42       ` Andrzej Hunt
2021-07-14 22:39         ` Ævar Arnfjörð Bjarmason
2021-07-15 21:14         ` Jeff King
2021-07-15 21:06       ` Jeff King
2021-07-16 14:46         ` Ævar Arnfjörð Bjarmason
2021-07-16 18:09           ` Jeff King
2021-07-16 18:45             ` Jeff King
2021-07-16 18:56             ` Ævar Arnfjörð Bjarmason
2021-07-16 19:22               ` Jeff King
2021-07-14 17:23     ` [PATCH v2 2/4] SANITIZE tests: fix memory leaks in t13*config*, add to whitelist Ævar Arnfjörð Bjarmason
2021-07-14 18:57       ` Andrzej Hunt
2021-07-14 22:56         ` Ævar Arnfjörð Bjarmason
2021-07-15 21:42         ` Jeff King
2021-07-16  5:18           ` Andrzej Hunt
2021-07-16 21:20             ` Jeff King
2021-07-16  7:46           ` Ævar Arnfjörð Bjarmason
2021-07-16 21:16             ` Jeff King
2021-08-31 12:47               ` Ævar Arnfjörð Bjarmason
2021-09-01  7:53                 ` Jeff King
2021-09-01 11:45                   ` Ævar Arnfjörð Bjarmason
2021-07-14 17:23     ` [PATCH v2 3/4] SANITIZE tests: fix memory leaks in t5701*, " Ævar Arnfjörð Bjarmason
2021-07-15 17:37       ` Andrzej Hunt
2021-07-15 21:43       ` Jeff King
2021-08-31 13:46       ` [PATCH] protocol-caps.c: fix memory leak in send_info() Ævar Arnfjörð Bjarmason
2021-08-31 15:32         ` Bruno Albuquerque
2021-08-31 18:15           ` Junio C Hamano
     [not found]         ` <CAPeR6H69a_HMwWnpHzssaCm_ow=ic7AnzMdZVQJQ2ECRDaWzaA@mail.gmail.com>
2021-08-31 20:08           ` Ævar Arnfjörð Bjarmason
2021-07-14 17:23     ` [PATCH v2 4/4] SANITIZE tests: fix leak in mailmap.c Ævar Arnfjörð Bjarmason
2021-08-31 13:42       ` [PATCH] mailmap.c: fix a memory leak in free_mailap_{info,entry}() Ævar Arnfjörð Bjarmason
2021-08-31 16:22         ` Eric Sunshine
2021-08-31 19:38         ` Jeff King
2021-08-31 19:46           ` Junio C Hamano
2021-07-15 17:37     ` [PATCH v2 0/4] add a test mode for SANITIZE=leak, run it in CI Andrzej Hunt
2021-08-31 13:35     ` [PATCH v3 0/8] " Ævar Arnfjörð Bjarmason
2021-09-01  9:56       ` Jeff King
2021-09-01 10:42         ` Jeff King
2021-09-02 12:25         ` Ævar Arnfjörð Bjarmason
2021-09-03 11:13           ` Jeff King
2021-09-07 15:33       ` [PATCH v4 0/3] " Ævar Arnfjörð Bjarmason
2021-09-07 15:33         ` [PATCH v4 1/3] Makefile: add SANITIZE=leak flag to GIT-BUILD-OPTIONS Ævar Arnfjörð Bjarmason
2021-09-07 15:33         ` [PATCH v4 2/3] CI: refactor "if" to "case" statement Ævar Arnfjörð Bjarmason
2021-09-07 15:33         ` [PATCH v4 3/3] tests: add a test mode for SANITIZE=leak, run it in CI Ævar Arnfjörð Bjarmason
2021-09-07 16:29           ` Eric Sunshine
2021-09-07 16:51           ` Jeff King
2021-09-07 16:44         ` [PATCH v4 0/3] " Jeff King
2021-09-07 18:22           ` Junio C Hamano
2021-09-07 21:30         ` [PATCH v5 " Ævar Arnfjörð Bjarmason
2021-09-07 21:30           ` [PATCH v5 1/3] Makefile: add SANITIZE=leak flag to GIT-BUILD-OPTIONS Ævar Arnfjörð Bjarmason
2021-09-07 21:30           ` [PATCH v5 2/3] CI: refactor "if" to "case" statement Ævar Arnfjörð Bjarmason
2021-09-07 21:30           ` [PATCH v5 3/3] tests: add a test mode for SANITIZE=leak, run it in CI Ævar Arnfjörð Bjarmason
2021-09-08  4:46             ` Eric Sunshine
2021-09-16  3:56             ` [PATCH] fixup! " Carlo Marcelo Arenas Belón
2021-09-16  6:14               ` Ævar Arnfjörð Bjarmason
2021-09-08 11:02           ` [PATCH v5 0/3] " Junio C Hamano
2021-09-08 12:03             ` Ævar Arnfjörð Bjarmason
2021-09-09 23:10               ` Emily Shaffer
2021-09-16 10:48           ` [PATCH v6 0/2] " Ævar Arnfjörð Bjarmason
2021-09-16 10:48             ` [PATCH v6 1/2] Makefile: add SANITIZE=leak flag to GIT-BUILD-OPTIONS Ævar Arnfjörð Bjarmason
2021-09-16 10:48             ` [PATCH v6 2/2] tests: add a test mode for SANITIZE=leak, run it in CI Ævar Arnfjörð Bjarmason
2021-09-19  8:03             ` [PATCH v7 0/2] " Ævar Arnfjörð Bjarmason
2021-09-19  8:03               ` [PATCH v7 1/2] Makefile: add SANITIZE=leak flag to GIT-BUILD-OPTIONS Ævar Arnfjörð Bjarmason
2021-09-19  8:03               ` [PATCH v7 2/2] tests: add a test mode for SANITIZE=leak, run it in CI Ævar Arnfjörð Bjarmason
2021-09-22 11:17                 ` [PATCH] fixup! " Carlo Marcelo Arenas Belón
2021-09-23  1:50                   ` Ævar Arnfjörð Bjarmason
2021-09-23  9:20               ` [PATCH v8 0/2] " Ævar Arnfjörð Bjarmason
2021-09-23  9:20                 ` [PATCH v8 1/2] Makefile: add SANITIZE=leak flag to GIT-BUILD-OPTIONS Ævar Arnfjörð Bjarmason
2021-09-23  9:20                 ` [PATCH v8 2/2] tests: add a test mode for SANITIZE=leak, run it in CI Ævar Arnfjörð Bjarmason
2021-11-03 22:44                   ` Re* " Junio C Hamano
2021-11-03 23:57                     ` Junio C Hamano
2021-11-04 10:06                     ` Ævar Arnfjörð Bjarmason
2021-11-16 18:31                       ` [PATCH] t0006: date_mode can leak .strftime_fmt member Ævar Arnfjörð Bjarmason
2021-11-16 19:04                         ` Junio C Hamano
2021-11-16 19:31                         ` Jeff King
2022-02-02 21:03                           ` [PATCH 0/5] date.[ch] API: split from cache.h, add API docs, stop leaking memory Ævar Arnfjörð Bjarmason
2022-02-02 21:03                             ` [PATCH 1/5] cache.h: remove always unused show_date_human() declaration Ævar Arnfjörð Bjarmason
2022-02-02 21:03                             ` [PATCH 2/5] date API: create a date.h, split from cache.h Ævar Arnfjörð Bjarmason
2022-02-02 21:19                               ` Ævar Arnfjörð Bjarmason
2022-02-15  3:04                               ` Junio C Hamano
2022-02-02 21:03                             ` [PATCH 3/5] date API: provide and use a DATE_MODE_INIT Ævar Arnfjörð Bjarmason
2022-02-02 21:03                             ` [PATCH 4/5] date API: add basic API docs Ævar Arnfjörð Bjarmason
2022-02-15  2:14                               ` Junio C Hamano
2022-02-02 21:03                             ` [PATCH 5/5] date API: add and use a date_mode_release() Ævar Arnfjörð Bjarmason
2022-02-15  0:28                               ` Junio C Hamano
2022-02-04 23:53                             ` [PATCH v2 0/5] date.[ch] API: split from cache.h, add API docs, stop leaking memory Ævar Arnfjörð Bjarmason
2022-02-04 23:53                               ` [PATCH v2 1/5] cache.h: remove always unused show_date_human() declaration Ævar Arnfjörð Bjarmason
2022-02-04 23:53                               ` [PATCH v2 2/5] date API: create a date.h, split from cache.h Ævar Arnfjörð Bjarmason
2022-02-04 23:53                               ` [PATCH v2 3/5] date API: provide and use a DATE_MODE_INIT Ævar Arnfjörð Bjarmason
2022-02-04 23:53                               ` [PATCH v2 4/5] date API: add basic API docs Ævar Arnfjörð Bjarmason
2022-02-04 23:53                               ` Ævar Arnfjörð Bjarmason [this message]
2022-02-14 17:25                               ` [PATCH v2 0/5] date.[ch] API: split from cache.h, add API docs, stop leaking memory Ævar Arnfjörð Bjarmason
2022-02-14 19:52                                 ` Junio C Hamano
2022-02-16  8:14                               ` [PATCH v3 " Ævar Arnfjörð Bjarmason
2022-02-16  8:14                                 ` [PATCH v3 1/5] cache.h: remove always unused show_date_human() declaration Ævar Arnfjörð Bjarmason
2022-02-16  8:14                                 ` [PATCH v3 2/5] date API: create a date.h, split from cache.h Ævar Arnfjörð Bjarmason
2022-02-16  8:14                                 ` [PATCH v3 3/5] date API: provide and use a DATE_MODE_INIT Ævar Arnfjörð Bjarmason
2022-02-16  8:14                                 ` [PATCH v3 4/5] date API: add basic API docs Ævar Arnfjörð Bjarmason
2022-02-16  8:14                                 ` [PATCH v3 5/5] date API: add and use a date_mode_release() Ævar Arnfjörð Bjarmason
2022-02-16 17:45                                 ` [PATCH v3 0/5] date.[ch] API: split from cache.h, add API docs, stop leaking memory Junio C Hamano
     [not found]     ` <cover-v3-0.8-00000000000-20210831T132607Z-avarab@gmail.com>
2021-08-31 13:35       ` [PATCH v3 1/8] Makefile: add SANITIZE=leak flag to GIT-BUILD-OPTIONS Ævar Arnfjörð Bjarmason
2021-08-31 13:35       ` [PATCH v3 2/8] CI: refactor "if" to "case" statement Ævar Arnfjörð Bjarmason
2021-08-31 13:35       ` [PATCH v3 3/8] tests: add a test mode for SANITIZE=leak, run it in CI Ævar Arnfjörð Bjarmason
2021-08-31 13:35       ` [PATCH v3 4/8] tests: annotate t000*.sh with TEST_PASSES_SANITIZE_LEAK=true Ævar Arnfjörð Bjarmason
2021-08-31 13:35       ` [PATCH v3 5/8] tests: annotate t001*.sh " Ævar Arnfjörð Bjarmason
2021-08-31 13:35       ` [PATCH v3 6/8] tests: annotate t002*.sh " Ævar Arnfjörð Bjarmason
2021-08-31 13:35       ` [PATCH v3 7/8] tests: annotate select t0*.sh " Ævar Arnfjörð Bjarmason
2021-08-31 13:35       ` [PATCH v3 8/8] tests: annotate select t*.sh " Ævar Arnfjörð Bjarmason

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