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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: Masami Hiramatsu (Google) <mhiramat@kernel.org>
This commit is contained in:
Masami Hiramatsu (Google) 2023-06-06 21:39:56 +09:00
parent 6335265ef2
commit 4231f30fcc
3 changed files with 86 additions and 0 deletions
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58
tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc Normal file
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@ -0,0 +1,58 @@
#!/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

14
tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
View File

@ -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

14
tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
View File

@ -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