[DTrace-devel] [PATCH 1/2] test: Allow more variations in expected fbt kernel stacks

[eugene.loh at oracle.com]

From: Eugene Loh <eugene.loh at oracle.com>

This test checks the call stack upon entry to vfs_write().
Unfortunately, these checks require some maintenance since the call
stack can vary -- slightly or greatly -- depending on processor or
kernel.  There is a competition between ease of test maintenance and
strictness of correctness checks.

Adapt post processing of output to allow new variations in stacks
seen in UEK 8 (currently Linux 6.12).

Orabug: 37459289
Signed-off-by: Eugene Loh <eugene.loh at oracle.com>
---
 test/unittest/stack/tst.stack_fbt.sh | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/test/unittest/stack/tst.stack_fbt.sh b/test/unittest/stack/tst.stack_fbt.sh
index c365e14d6..8a0b7999c 100755
--- a/test/unittest/stack/tst.stack_fbt.sh
+++ b/test/unittest/stack/tst.stack_fbt.sh
@@ -37,9 +37,18 @@ if [ $? -ne 0 ]; then
 	exit 1
 fi
 
-# Strip out blank lines and pointer values.
-
-awk 'NF != 0 { sub(/+0x[0-9a-f]*$/, "+{ptr}"); print }' dtrace.out > dtrace.post
+# Strip out
+# - blank lines
+# - "constprop"
+# - "isra"
+# - "_after_hwframe"    (x86 starting with UEK8)
+# - pointer values
+
+awk 'NF != 0 { sub("\\.constprop\\.[0-9]", "");
+               sub("\\.isra\\.[0-9]", "");
+               sub("_after_hwframe\\+", "+");
+               sub(/+0x[0-9a-f]*$/, "+{ptr}");
+               print }' dtrace.out > dtrace.post
 if [ $? -ne 0 ]; then
 	echo ERROR: awk failed
 	cat dtrace.out
-- 
2.43.5