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authorLinus Torvalds <torvalds@linux-foundation.org>2023-09-02 21:10:50 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2023-09-02 21:10:50 +0300
commitb70100f2e62aeec2087d7690e41f7d6afd445f5a (patch)
tree7bb7c3425b02a764a287aed950f86939d7d5a500 /tools/testing/selftests/ftrace
parente021c5f1f612536c2eb9d46206b786c76a01c8e5 (diff)
parenta2439a4c90856b83657aec4600c19551aa9501ff (diff)
downloadlinux-b70100f2e62aeec2087d7690e41f7d6afd445f5a.tar.xz
Merge tag 'probes-v6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull probes updates from Masami Hiramatsu: - kprobes: use struct_size() for variable size kretprobe_instance data structure. - eprobe: Simplify trace_eprobe list iteration. - probe events: Data structure field access support on BTF argument. - Update BTF argument support on the functions in the kernel loadable modules (only loaded modules are supported). - Move generic BTF access function (search function prototype and get function parameters) to a separated file. - Add a function to search a member of data structure in BTF. - Support accessing BTF data structure member from probe args by C-like arrow('->') and dot('.') operators. e.g. 't sched_switch next=next->pid vruntime=next->se.vruntime' - Support accessing BTF data structure member from $retval. e.g. 'f getname_flags%return +0($retval->name):string' - Add string type checking if BTF type info is available. This will reject if user specify ":string" type for non "char pointer" type. - Automatically assume the fprobe event as a function return event if $retval is used. - selftests/ftrace: Add BTF data field access test cases. - Documentation: Update fprobe event example with BTF data field. * tag 'probes-v6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: Documentation: tracing: Update fprobe event example with BTF field selftests/ftrace: Add BTF fields access testcases tracing/fprobe-event: Assume fprobe is a return event by $retval tracing/probes: Add string type check with BTF tracing/probes: Support BTF field access from $retval tracing/probes: Support BTF based data structure field access tracing/probes: Add a function to search a member of a struct/union tracing/probes: Move finding func-proto API and getting func-param API to trace_btf tracing/probes: Support BTF argument on module functions tracing/eprobe: Iterate trace_eprobe directly kernel: kprobes: Use struct_size()
Diffstat (limited to 'tools/testing/selftests/ftrace')
-rw-r--r--tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc20
-rw-r--r--tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc10
2 files changed, 29 insertions, 1 deletions
diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc
index f34b14ef9781..b9c21a81d248 100644
--- a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc
@@ -5,6 +5,7 @@
KPROBES=
FPROBES=
+FIELDS=
if grep -qF "p[:[<group>/][<event>]] <place> [<args>]" README ; then
KPROBES=yes
@@ -12,6 +13,9 @@ fi
if grep -qF "f[:[<group>/][<event>]] <func-name>[%return] [<args>]" README ; then
FPROBES=yes
fi
+if grep -qF "<argname>[->field[->field|.field...]]" README ; then
+ FIELDS=yes
+fi
if [ -z "$KPROBES" -a -z "$FPROBES" ] ; then
exit_unsupported
@@ -21,6 +25,9 @@ echo 0 > events/enable
echo > dynamic_events
TP=kfree
+TP2=kmem_cache_alloc
+TP3=getname_flags
+TP4=sched_wakeup
if [ "$FPROBES" ] ; then
echo "f:fpevent $TP object" >> dynamic_events
@@ -33,6 +40,7 @@ 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
@@ -45,6 +53,18 @@ fi
echo > dynamic_events
+if [ "$FIELDS" ] ; then
+echo "t:tpevent ${TP2} obj_size=s->object_size" >> dynamic_events
+echo "f:fpevent ${TP3}%return path=\$retval->name:string" >> dynamic_events
+echo "t:tpevent2 ${TP4} p->se.group_node.next->prev" >> dynamic_events
+
+grep -q "tpevent .*obj_size=s->object_size" dynamic_events
+grep -q "fpevent.*path=\$retval->name:string" dynamic_events
+grep -q 'tpevent2 .*p->se.group_node.next->prev' dynamic_events
+
+echo > dynamic_events
+fi
+
if [ "$KPROBES" ] ; then
echo "p:kpevent $TP object" >> dynamic_events
grep -q "kpevent.*object=object" dynamic_events
diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
index 812f5b3f6055..20e42c030095 100644
--- a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
@@ -30,11 +30,11 @@ check_error 'f:^ vfs_read' # NO_EVENT_NAME
check_error 'f:foo/^12345678901234567890123456789012345678901234567890123456789012345 vfs_read' # EVENT_TOO_LONG
check_error 'f:foo/^bar.1 vfs_read' # BAD_EVENT_NAME
-check_error 'f vfs_read ^$retval' # RETVAL_ON_PROBE
check_error 'f vfs_read ^$stack10000' # BAD_STACK_NUM
check_error 'f vfs_read ^$arg10000' # BAD_ARG_NUM
+check_error 'f vfs_read $retval ^$arg1' # BAD_VAR
check_error 'f vfs_read ^$none_var' # BAD_VAR
check_error 'f vfs_read ^'$REG # BAD_VAR
@@ -103,6 +103,14 @@ 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
+
+if grep -qF "<argname>[->field[->field|.field...]]" README ; then
+check_error 'f vfs_read%return $retval->^foo' # NO_PTR_STRCT
+check_error 'f vfs_read file->^foo' # NO_BTF_FIELD
+check_error 'f vfs_read file^-.foo' # BAD_HYPHEN
+check_error 'f vfs_read ^file:string' # BAD_TYPE4STR
+fi
+
else
check_error 'f vfs_read ^$arg*' # NOSUP_BTFARG
check_error 't kfree ^$arg*' # NOSUP_BTFARG