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>

diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc
new file mode 100644 (file)
index 0000000..b89de17
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc
@@ -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

diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
index 4065a21efea1f4d3687ec2a862a0a223c3f3a029..812f5b3f60550fa3dc427fbb474473e80776e67f 100644 (file)
--- a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
@@ -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

diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
index 97c08867490a8ea3d1fc933acaa1796d5af13c15..65fbb26fd58c103b761c438ed9198ba571ae6ab3 100644 (file)
--- a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
+++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
@@ -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