Commit 4231f30f authored by Masami Hiramatsu (Google)'s avatar Masami Hiramatsu (Google)
Browse files

selftests/ftrace: Add BTF arguments test cases 

Add test cases to check the BTF arguments correctly supported.

Link: https://lore.kernel.org/all/168507478292.913472.25631899274942311.stgit@mhiramat.roam.corp.google.com/



Signed-off-by: default avatarMasami Hiramatsu (Google) <mhiramat@kernel.org>
parent 6335265e

tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc

0 → 100644
+58 −0
Original line number Diff line number Diff line 
#!/bin/sh

# SPDX-License-Identifier: GPL-2.0

# description: Generic dynamic event - add/remove probes with BTF arguments

# requires: dynamic_events "<argname>":README



KPROBES=

FPROBES=



if grep -qF "p[:[<group>/][<event>]] <place> [<args>]" README ; then

  KPROBES=yes

fi

if grep -qF "f[:[<group>/][<event>]] <func-name>[%return] [<args>]" README ; then

  FPROBES=yes

fi



if [ -z "$KPROBES" -a "$FPROBES" ] ; then

  exit_unsupported

fi



echo 0 > events/enable

echo > dynamic_events



TP=kfree



if [ "$FPROBES" ] ; then

echo "f:fpevent $TP object" >> dynamic_events

echo "t:tpevent $TP ptr" >> dynamic_events



grep -q "fpevent.*object=object" dynamic_events

grep -q "tpevent.*ptr=ptr" dynamic_events



echo > dynamic_events



echo "f:fpevent $TP "'$arg1' >> dynamic_events

grep -q "fpevent.*object=object" dynamic_events

echo > dynamic_events



echo "f:fpevent $TP "'$arg*' >> dynamic_events

echo "t:tpevent $TP "'$arg*' >> dynamic_events



grep -q "fpevent.*object=object" dynamic_events

grep -q "tpevent.*ptr=ptr" dynamic_events

! grep -q "tpevent.*_data" dynamic_events

fi



echo > dynamic_events



if [ "$KPROBES" ] ; then

echo "p:kpevent $TP object" >> dynamic_events

grep -q "kpevent.*object=object" dynamic_events



echo > dynamic_events



echo "p:kpevent $TP "'$arg*' >> dynamic_events

grep -q "kpevent.*object=object" dynamic_events

fi



clear_trace

tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc

+14 −0
Original line number Diff line number Diff line
@@ -94,4 +94,18 @@ fi 
# %return suffix errors

check_error 'f vfs_read^%hoge'		# BAD_ADDR_SUFFIX



# BTF arguments errors

if grep -q "<argname>" README; then

check_error 'f vfs_read args=^$arg*'		# BAD_VAR_ARGS

check_error 'f vfs_read +0(^$arg*)'		# BAD_VAR_ARGS

check_error 'f vfs_read $arg* ^$arg*'		# DOUBLE_ARGS

check_error 'f vfs_read%return ^$arg*'		# NOFENTRY_ARGS

check_error 'f vfs_read ^hoge'			# NO_BTFARG

check_error 'f kfree ^$arg10'			# NO_BTFARG (exceed the number of parameters)

check_error 'f kfree%return ^$retval'		# NO_RETVAL

else

check_error 'f vfs_read ^$arg*'			# NOSUP_BTFARG

check_error 't kfree ^$arg*'			# NOSUP_BTFARG

fi



exit 0

tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc

+14 −0
Original line number Diff line number Diff line
@@ -103,4 +103,18 @@ check_error 'p vfs_read^%hoge' # BAD_ADDR_SUFFIX 
check_error 'p ^vfs_read+10%return'	# BAD_RETPROBE

fi



# BTF arguments errors

if grep -q "<argname>" README; then

check_error 'p vfs_read args=^$arg*'		# BAD_VAR_ARGS

check_error 'p vfs_read +0(^$arg*)'		# BAD_VAR_ARGS

check_error 'p vfs_read $arg* ^$arg*'		# DOUBLE_ARGS

check_error 'r vfs_read ^$arg*'			# NOFENTRY_ARGS

check_error 'p vfs_read+8 ^$arg*'		# NOFENTRY_ARGS

check_error 'p vfs_read ^hoge'			# NO_BTFARG

check_error 'p kfree ^$arg10'			# NO_BTFARG (exceed the number of parameters)

check_error 'r kfree ^$retval'			# NO_RETVAL

else

check_error 'p vfs_read ^$arg*'			# NOSUP_BTFARG

fi



exit 0