From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
If kmemleak is enabled, scan and report memory leaks after every test.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
check | 2 ++
common/rc | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 62 insertions(+)
diff --git a/check b/check
index 9868d22..b7b3d57 100755
--- a/check
+++ b/check
@@ -499,6 +499,7 @@ _check_filesystems()
fi
}
+_init_kmemleak
_prepare_test_list
if $OPTIONS_HAVE_SECTIONS; then
@@ -795,6 +796,7 @@ for section in $HOST_OPTIONS_SECTIONS; do
n_try=`expr $n_try + 1`
_check_filesystems
_check_dmesg || err=true
+ _check_kmemleak || err=true
fi
fi
diff --git a/common/rc b/common/rc
index 880555c..0d0def7 100644
--- a/common/rc
+++ b/common/rc
@@ -3452,6 +3452,66 @@ _check_dmesg()
fi
}
+# capture the kmemleak report
+_capture_kmemleak()
+{
+ local _kern_knob="${DEBUGFS_MNT}/kmemleak"
+ local _leak_file="$1"
+
+ # Tell the kernel to scan for memory leaks. Apparently the write
+ # returns before the scan is complete, so do it twice in the hopes
+ # that twice is enough to capture all the leaks.
+ echo "scan" > "${_kern_knob}"
+ cat "${_kern_knob}" > /dev/null
+ echo "scan" > "${_kern_knob}"
+ cat "${_kern_knob}" > "${_leak_file}.tmp"
+ if [ -s "${_leak_file}.tmp" ]; then
+ cat > "${_leak_file}" << ENDL
+EXPERIMENTAL kmemleak reported some memory leaks! Due to the way kmemleak
+works, the leak might be from an earlier test, or something totally unrelated.
+ENDL
+ cat "${_leak_file}.tmp" >> "${_leak_file}"
+ rm -rf "${_leak_file}.tmp"
+ fi
+ echo "clear" > "${_kern_knob}"
+}
+
+# set up kmemleak
+_init_kmemleak()
+{
+ local _kern_knob="${DEBUGFS_MNT}/kmemleak"
+
+ if [ ! -w "${_kern_knob}" ]; then
+ return 0
+ fi
+
+ # Disable the automatic scan so that we can control it completely,
+ # then dump all the leaks recorded so far.
+ echo "scan=off" > "${_kern_knob}"
+ _capture_kmemleak /dev/null
+}
+
+# check kmemleak log
+_check_kmemleak()
+{
+ local _kern_knob="${DEBUGFS_MNT}/kmemleak"
+ local _leak_file="${seqres}.kmemleak"
+
+ if [ ! -w "${_kern_knob}" ]; then
+ return 0
+ fi
+
+ # Capture and report any leaks
+ _capture_kmemleak "${_leak_file}"
+ if [ -s "${_leak_file}" ]; then
+ _dump_err "_check_kmemleak: something found in kmemleak (see ${_leak_file})"
+ return 1
+ else
+ rm -f "${_leak_file}"
+ return 0
+ fi
+}
+
# don't check dmesg log after test
_disable_dmesg_check()
{
--
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