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

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/ftrace/test.d/kprobe/multiple_kprobes.tc
Extension
.tc
Size
881 bytes
Lines
36
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: Register/unregister many kprobe events
# requires: kprobe_events

# ftrace fentry skip size depends on the machine architecture.
# Currently HAVE_KPROBES_ON_FTRACE defined on x86 and powerpc64le
case `uname -m` in
  x86_64|i[3456]86) OFFS=5;;
  ppc64le) OFFS=8;;
  *) OFFS=0;;
esac

N=0
echo "Setup up kprobes on first available 256 text symbols"
grep -i " t " /proc/kallsyms | cut -f3 -d" " | grep -v .*\\..* | \
while read i; do
  echo p ${i}+${OFFS} >> kprobe_events && N=$((N+1)) ||:
  test $N -eq 256 && break
done

L=`cat kprobe_events | wc -l`
if [ $L -ne 256 ]; then
  echo "The number of kprobes events ($L) is not 256"
  exit_fail
fi

cat kprobe_events >> $testlog

echo 1 > events/kprobes/enable
echo 0 > events/kprobes/enable
echo > kprobe_events
echo "Waiting for unoptimizing & freeing"
sleep 5
echo "Done"

Annotation

Implementation Notes