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

Source file repositories/reference/linux-study-clean/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/ftrace/test.d/dynevent/add_remove_btfarg.tc
Extension
.tc
Size
1962 bytes
Lines
79
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#!/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=
FIELDS=

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 grep -qF "<argname>[->field[->field|.field...]]" README ; then
  FIELDS=yes
fi

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

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
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 [ "$FIELDS" -a "$FPROBES" ] ; 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

Annotation

Implementation Notes