tests: cache glibc version check
131b94a10a ("test-lib.sh: Use GLIBC_TUNABLES instead of MALLOC_CHECK_
on glibc >= 2.34", 2022-03-04) introduced a check for the version of
glibc that is in use. This check is performed as part of
setup_malloc_check() which is called at least once for each test. As
the test involves forking `getconf` and `expr` cache the result and
use that within setup_malloc_check() to avoid forking these extra
processes for each test.
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/test-lib.sh b/t/test-lib.sh
index 8cabb4d..120f118 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -557,14 +557,19 @@
: nothing
}
else
+ _USE_GLIBC_TUNABLES=
+ if _GLIBC_VERSION=$(getconf GNU_LIBC_VERSION 2>/dev/null) &&
+ _GLIBC_VERSION=${_GLIBC_VERSION#"glibc "} &&
+ expr 2.34 \<= "$_GLIBC_VERSION" >/dev/null
+ then
+ _USE_GLIBC_TUNABLES=YesPlease
+ fi
setup_malloc_check () {
local g
local t
MALLOC_CHECK_=3 MALLOC_PERTURB_=165
export MALLOC_CHECK_ MALLOC_PERTURB_
- if _GLIBC_VERSION=$(getconf GNU_LIBC_VERSION 2>/dev/null) &&
- _GLIBC_VERSION=${_GLIBC_VERSION#"glibc "} &&
- expr 2.34 \<= "$_GLIBC_VERSION" >/dev/null
+ if test -n "$_USE_GLIBC_TUNABLES"
then
g=
LD_PRELOAD="libc_malloc_debug.so.0"
