From: Masami Hiramatsu (Google) <mhiramat@kernel.org>
To: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH v3 2/2] selftests/ftrace: Add boot-time tracing test framework
Date: Sat, 8 Aug 2026 21:19:57 +0900 [thread overview]
Message-ID: <20260808211957.f30d0194f1c0edc41b87529c@kernel.org> (raw)
In-Reply-To: <178613906103.259829.13367936927077263219.stgit@devnote2>
On Sat, 8 Aug 2026 06:44:21 +0900
"Masami Hiramatsu (Google)" <mhiramat@kernel.org> wrote:
> From: Masami Hiramatsu (Google) <mhiramat@kernel.org>
>
> Add an automated test framework under
> tools/testing/selftests/ftrace/boottime/ to verify boot-time tracing
> configuration parsing.
>
> The test runner (run_boottime_test.sh) sources ktap_helpers.sh to
> generate output in TAP version 13 format. It builds a minimal
> initramfs with busybox, attaches bootconfig examples using
> tools/bootconfig/bootconfig, boots QEMU, and runs corresponding
> tracefs checker scripts.
This needs more fix which Sashiko pointed. But I think I rather like
to rewrite this for more generic boot time tracing, including
kernel cmdline not only bootconfig, and persistent ring buffer
etc. We does not have a functional test for such features in
ftracetest, because ftracetest only runs after boot.
So let me pick [1/2] and make another series for this test.
Thank you,
>
> Assisted-by: Antigravity:gemini-3.6-flash
> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
>
> Changes in v3:
> - Remove boottime/run_boottime_test.sh from TEST_PROGS_EXTENDED in Makefile
> to prevent lib.mk from flattening it into top-level ftrace/ on make install.
> - Support executing run_boottime_test.sh both in-tree and in installed
> kselftest environment.
> - Add HUP, INT, and TERM signal handlers to tempdir cleanup trap.
> - Validate workdir creation and update run_single_test() to return 0 on test
> failures so set -e is not suspended by invocation in an AND-OR list.
>
> Changes in v2:
> - Copy shared library dependencies using ldd if busybox is dynamically
> linked.
> - Wrap QEMU execution with timeout command and add -T/--timeout CLI
> option.
> - Add pre-flight checks for busybox architecture compatibility and
> cpio tool in run_boottime_test.sh.
> - Fix POSIX syntax compatibility and allow bypassing HOST_ARCH skip
> when custom kernel/QEMU parameters are passed.
> - Add boottime/run_boottime_test.sh to TEST_PROGS_EXTENDED in
> selftests/ftrace/Makefile.
> ---
> tools/testing/selftests/ftrace/Makefile | 2
> tools/testing/selftests/ftrace/boottime/Makefile | 10 +
> tools/testing/selftests/ftrace/boottime/README | 58 ++++
> .../ftrace/boottime/bootconfigs/01-kprobe.bconf | 5
> .../ftrace/boottime/bootconfigs/02-synth.bconf | 4
> .../ftrace/boottime/bootconfigs/03-eprobe.bconf | 4
> .../ftrace/boottime/bootconfigs/04-fprobe.bconf | 4
> .../ftrace/boottime/bootconfigs/05-tprobe.bconf | 4
> .../ftrace/boottime/bootconfigs/06-instance.bconf | 5
> .../selftests/ftrace/boottime/run_boottime_test.sh | 271 ++++++++++++++++++++
> .../selftests/ftrace/boottime/tests/01-kprobe.sh | 18 +
> .../selftests/ftrace/boottime/tests/02-synth.sh | 18 +
> .../selftests/ftrace/boottime/tests/03-eprobe.sh | 18 +
> .../selftests/ftrace/boottime/tests/04-fprobe.sh | 18 +
> .../selftests/ftrace/boottime/tests/05-tprobe.sh | 18 +
> .../selftests/ftrace/boottime/tests/06-instance.sh | 23 ++
> tools/testing/selftests/ftrace/config | 4
> 17 files changed, 483 insertions(+), 1 deletion(-)
> create mode 100644 tools/testing/selftests/ftrace/boottime/Makefile
> create mode 100644 tools/testing/selftests/ftrace/boottime/README
> create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/01-kprobe.bconf
> create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/02-synth.bconf
> create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/03-eprobe.bconf
> create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/04-fprobe.bconf
> create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/05-tprobe.bconf
> create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/06-instance.bconf
> create mode 100755 tools/testing/selftests/ftrace/boottime/run_boottime_test.sh
> create mode 100755 tools/testing/selftests/ftrace/boottime/tests/01-kprobe.sh
> create mode 100755 tools/testing/selftests/ftrace/boottime/tests/02-synth.sh
> create mode 100755 tools/testing/selftests/ftrace/boottime/tests/03-eprobe.sh
> create mode 100755 tools/testing/selftests/ftrace/boottime/tests/04-fprobe.sh
> create mode 100755 tools/testing/selftests/ftrace/boottime/tests/05-tprobe.sh
> create mode 100755 tools/testing/selftests/ftrace/boottime/tests/06-instance.sh
>
> diff --git a/tools/testing/selftests/ftrace/Makefile b/tools/testing/selftests/ftrace/Makefile
> index 7c12263f8260..8d8881744149 100644
> --- a/tools/testing/selftests/ftrace/Makefile
> +++ b/tools/testing/selftests/ftrace/Makefile
> @@ -3,7 +3,7 @@ all:
>
> TEST_PROGS_EXTENDED := ftracetest
> TEST_PROGS := ftracetest-ktap
> -TEST_FILES := test.d settings
> +TEST_FILES := test.d settings boottime
> EXTRA_CLEAN := $(OUTPUT)/logs/*
>
> TEST_GEN_FILES := poll
> diff --git a/tools/testing/selftests/ftrace/boottime/Makefile b/tools/testing/selftests/ftrace/boottime/Makefile
> new file mode 100644
> index 000000000000..fd0975350f10
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/Makefile
> @@ -0,0 +1,10 @@
> +# SPDX-License-Identifier: GPL-2.0
> +
> +all:
> +
> +run_tests:
> + @./run_boottime_test.sh
> +
> +clean:
> +
> +.PHONY: all run_tests clean
> diff --git a/tools/testing/selftests/ftrace/boottime/README b/tools/testing/selftests/ftrace/boottime/README
> new file mode 100644
> index 000000000000..a6f930a6e44c
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/README
> @@ -0,0 +1,58 @@
> +Boot-Time Tracing Test Suite
> +============================
> +
> +This directory contains an automated test framework to verify kernel boot-time
> +tracing configuration parsing and tracefs application during early boot.
> +
> +Overview
> +--------
> +The test runner (`run_boottime_test.sh`) constructs a lightweight initramfs with
> +busybox and a tracefs checker script from `tests/`, attaches a bootconfig example
> +from `bootconfigs/` using the `bootconfig` tool, boots the target kernel image under
> +QEMU, and reports results according to the TAP version 13 format.
> +
> +Required Tools
> +--------------
> +- Host Architecture: x86 (x86_64/i686/i386/x86; tests skip on non-x86 hosts)
> +- `qemu-system-x86_64` (or custom QEMU executable)
> +- `busybox` (host binary at `/usr/bin/busybox` or custom path)
> +- `bootconfig` (compiled from `tools/bootconfig/bootconfig` or in PATH)
> +- `cpio` (standard archiver)
> +
> +Required Kernel Configurations
> +------------------------------
> +The kernel binary under test must be compiled with:
> +- `CONFIG_BOOT_CONFIG=y`
> +- `CONFIG_BOOTTIME_TRACING=y`
> +
> +Additional feature-specific config options enable respective testcases:
> +- `CONFIG_KPROBE_EVENTS=y` (for `01-kprobe`)
> +- `CONFIG_SYNTH_EVENTS=y` (for `02-synth`)
> +- `CONFIG_EPROBE_EVENTS=y` (for `03-eprobe`)
> +- `CONFIG_FPROBE_EVENTS=y` (for `04-fprobe` and `05-tprobe`)
> +- `CONFIG_FUNCTION_TRACER=y` (for tracer options in `06-instance`)
> +
> +Usage
> +-----
> +To run all test cases with a compiled kernel image:
> +
> + $ ./run_boottime_test.sh -k /path/to/bzImage
> +
> +To run a specific test case (e.g. `01-kprobe`):
> +
> + $ ./run_boottime_test.sh -k /path/to/bzImage -t 01-kprobe
> +
> +Customizing Tool Paths:
> +
> + $ ./run_boottime_test.sh -b /path/to/bootconfig \
> + -k /path/to/bzImage \
> + -q /path/to/qemu-system-x86_64 \
> + -B /path/to/busybox
> +
> +Environment Variables
> +---------------------
> +Tool locations and kernel paths can also be set via environment variables:
> +- `BOOTCONFIG`: Path to the `bootconfig` tool
> +- `KERNEL`: Path to the `bzImage` kernel binary
> +- `QEMU`: Path to the QEMU binary
> +- `BUSYBOX`: Path to the `busybox` binary
> diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/01-kprobe.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/01-kprobe.bconf
> new file mode 100644
> index 000000000000..f607840e3858
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/01-kprobe.bconf
> @@ -0,0 +1,5 @@
> +ftrace.event.kprobes.vfs_read {
> + probes = "vfs_read $arg1 $arg2"
> + filter = "common_pid < 200"
> + enable
> +}
> diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/02-synth.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/02-synth.bconf
> new file mode 100644
> index 000000000000..b1f37713f33c
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/02-synth.bconf
> @@ -0,0 +1,4 @@
> +ftrace.event.synthetic.boot_lat {
> + fields = "unsigned long id", "u64 delta"
> + enable
> +}
> diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/03-eprobe.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/03-eprobe.bconf
> new file mode 100644
> index 000000000000..f954aa7fb8bd
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/03-eprobe.bconf
> @@ -0,0 +1,4 @@
> +ftrace.event.eprobes.ep_read {
> + probes = "syscalls/sys_enter_openat"
> + enable
> +}
> diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/04-fprobe.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/04-fprobe.bconf
> new file mode 100644
> index 000000000000..82ae2ac0629f
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/04-fprobe.bconf
> @@ -0,0 +1,4 @@
> +ftrace.event.fprobes.fp_read {
> + probes = "vfs_read"
> + enable
> +}
> diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/05-tprobe.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/05-tprobe.bconf
> new file mode 100644
> index 000000000000..02a2803c770a
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/05-tprobe.bconf
> @@ -0,0 +1,4 @@
> +ftrace.event.tracepoints.tp_sched {
> + probes = "sched_switch"
> + enable
> +}
> diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/06-instance.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/06-instance.bconf
> new file mode 100644
> index 000000000000..31f81da570ea
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/06-instance.bconf
> @@ -0,0 +1,5 @@
> +ftrace.instance.foo {
> + event.sched.sched_switch.enable
> + buffer_size = 1MB
> + tracing_on = 1
> +}
> diff --git a/tools/testing/selftests/ftrace/boottime/run_boottime_test.sh b/tools/testing/selftests/ftrace/boottime/run_boottime_test.sh
> new file mode 100755
> index 000000000000..7ba1afc91c35
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/run_boottime_test.sh
> @@ -0,0 +1,271 @@
> +#!/bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +# Boot-time tracing test runner
> +# Builds a lightweight initramfs, attaches a bootconfig, boots QEMU,
> +# and verifies tracefs configuration using test scripts.
> +
> +set -e
> +
> +SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
> +if [ -d "$SCRIPT_DIR/boottime" ]; then
> + SCRIPT_DIR="$SCRIPT_DIR/boottime"
> +fi
> +KERNEL_SRC="$(cd "$SCRIPT_DIR/../../../../.." && pwd)"
> +
> +# Source KTAP helpers
> +if [ -f "$SCRIPT_DIR/../../kselftest/ktap_helpers.sh" ]; then
> + KSELFTEST_DIR="$(cd "$SCRIPT_DIR/../../kselftest" && pwd)"
> +elif [ -f "$SCRIPT_DIR/../kselftest/ktap_helpers.sh" ]; then
> + KSELFTEST_DIR="$(cd "$SCRIPT_DIR/../kselftest" && pwd)"
> +else
> + echo "Error: ktap_helpers.sh not found relative to $SCRIPT_DIR"
> + exit 1
> +fi
> +. "$KSELFTEST_DIR/ktap_helpers.sh"
> +
> +BOOTCONFIG="${BOOTCONFIG:-"$KERNEL_SRC/tools/bootconfig/bootconfig"}"
> +KERNEL="${KERNEL:-"$KERNEL_SRC/arch/x86/boot/bzImage"}"
> +QEMU="${QEMU:-"qemu-system-x86_64"}"
> +BUSYBOX="${BUSYBOX:-"$(which busybox 2>/dev/null || echo "/usr/bin/busybox")"}"
> +TIMEOUT="${TIMEOUT:-30s}"
> +TARGET_TEST="all"
> +
> +usage() {
> + echo "Usage: $0 [options]"
> + echo "Options:"
> + echo " -b, --bootconfig PATH Path to bootconfig tool (default: $BOOTCONFIG)"
> + echo " -k, --kernel PATH Path to kernel image (default: $KERNEL)"
> + echo " -q, --qemu PATH Path to QEMU executable (default: $QEMU)"
> + echo " -B, --busybox PATH Path to busybox binary (default: $BUSYBOX)"
> + echo " -T, --timeout DURATION QEMU execution timeout (default: $TIMEOUT)"
> + echo " -t, --test NAME Run specific test (e.g. 01-kprobe) or 'all'"
> + echo " -h, --help Show this help message"
> + exit 1
> +}
> +
> +while [ $# -gt 0 ]; do
> + case "$1" in
> + -b|--bootconfig)
> + BOOTCONFIG="$2"
> + shift 2
> + ;;
> + -k|--kernel)
> + KERNEL="$2"
> + shift 2
> + ;;
> + -q|--qemu)
> + QEMU="$2"
> + shift 2
> + ;;
> + -B|--busybox)
> + BUSYBOX="$2"
> + shift 2
> + ;;
> + -T|--timeout)
> + TIMEOUT="$2"
> + shift 2
> + ;;
> + -t|--test)
> + TARGET_TEST="$2"
> + shift 2
> + ;;
> + -h|--help)
> + usage
> + ;;
> + *)
> + echo "Unknown option: $1"
> + usage
> + ;;
> + esac
> +done
> +
> +# Check host architecture
> +HOST_ARCH="$(uname -m)"
> +case "$HOST_ARCH" in
> + x86_64|i686|i386|x86)
> + ;;
> + *)
> + if [ "$KERNEL" = "$KERNEL_SRC/arch/x86/boot/bzImage" ]; then
> + ktap_print_header
> + ktap_skip_all \
> + "Default boot-time tracing test is x86 only ($HOST_ARCH)"
> + exit 0
> + fi
> + ;;
> +esac
> +
> +# Ensure bootconfig tool is built if Makefile exists
> +if [ ! -x "$BOOTCONFIG" ]; then
> + if [ -f "$KERNEL_SRC/tools/bootconfig/Makefile" ]; then
> + make -C "$KERNEL_SRC/tools/bootconfig" > /dev/null 2>&1 || true
> + fi
> + if [ ! -x "$BOOTCONFIG" ]; then
> + BOOTCONFIG="$(which bootconfig 2>/dev/null || true)"
> + fi
> +fi
> +
> +if [ ! -x "$BOOTCONFIG" ]; then
> + ktap_print_header
> + ktap_skip_all "bootconfig tool not found at $BOOTCONFIG"
> + exit 0
> +fi
> +
> +if [ ! -f "$KERNEL" ]; then
> + ktap_print_header
> + ktap_skip_all "Kernel image not found at $KERNEL"
> + exit 0
> +fi
> +
> +if ! command -v "$QEMU" >/dev/null 2>&1; then
> + ktap_print_header
> + ktap_skip_all "QEMU binary not found: $QEMU"
> + exit 0
> +fi
> +
> +if [ ! -x "$BUSYBOX" ]; then
> + ktap_print_header
> + ktap_skip_all "busybox binary not found at $BUSYBOX"
> + exit 0
> +fi
> +
> +# Verify busybox architecture compatibility
> +if command -v file >/dev/null 2>&1; then
> + BUSYBOX_INFO="$(file -b "$BUSYBOX" 2>/dev/null || true)"
> + case "$KERNEL" in
> + *x86*)
> + case "$BUSYBOX_INFO" in
> + *x86-64*|*x86_64*|*80386*|*i386*)
> + ;;
> + *)
> + ktap_print_header
> + ktap_skip_all "busybox binary architecture is incompatible with x86 kernel ($BUSYBOX_INFO)"
> + exit 0
> + ;;
> + esac
> + ;;
> + esac
> +fi
> +
> +if ! command -v cpio >/dev/null 2>&1; then
> + ktap_print_header
> + ktap_skip_all "cpio tool not found"
> + exit 0
> +fi
> +
> +run_single_test() {
> + local bconf_file="$1"
> + local test_script="$2"
> + local name="$(basename "$bconf_file" .bconf)"
> +
> + local workdir="$(mktemp -d)"
> + if [ -z "$workdir" ] || [ ! -d "$workdir" ]; then
> + ktap_test_fail "$name (failed to create temporary directory)"
> + return 0
> + fi
> + trap 'rm -rf "$workdir"' EXIT HUP INT TERM
> +
> + local rootfs="$workdir/rootfs"
> + mkdir -p "$rootfs"/{bin,sbin,etc,proc,sys,dev,tmp}
> +
> + cp "$BUSYBOX" "$rootfs/bin/busybox"
> + chmod +x "$rootfs/bin/busybox"
> + (cd "$rootfs/bin" && for applet in sh cat mount umount echo sync reboot \
> + poweroff cpio grep; do ln -s busybox $applet; done)
> +
> + if command -v ldd >/dev/null 2>&1; then
> + for lib in $(ldd "$BUSYBOX" 2>/dev/null | grep -o '/[^ ]*'); do
> + if [ -f "$lib" ]; then
> + mkdir -p "$rootfs$(dirname "$lib")"
> + cp -L "$lib" "$rootfs$lib" 2>/dev/null || true
> + fi
> + done
> + fi
> +
> + cat << 'EOF' > "$rootfs/init"
> +#!/bin/sh
> +mount -t proc proc /proc 2>/dev/null
> +mount -t sysfs sys /sys 2>/dev/null
> +mount -t tracefs nodev /sys/kernel/tracing 2>/dev/null
> +
> +/bin/check_test.sh
> +RET=$?
> +
> +if [ $RET -eq 0 ]; then
> + echo "TEST RESULT: PASS"
> +else
> + echo "TEST RESULT: FAIL"
> +fi
> +
> +sync
> +echo o > /proc/sysrq-trigger 2>/dev/null || reboot -f 2>/dev/null || poweroff -f 2>/dev/null
> +EOF
> + chmod +x "$rootfs/init"
> +
> + cp "$test_script" "$rootfs/bin/check_test.sh"
> + chmod +x "$rootfs/bin/check_test.sh"
> +
> + local initramfs="$workdir/initramfs.cpio"
> + (cd "$rootfs" && find . | cpio -o -H newc --quiet) > "$initramfs"
> +
> + # Attach bootconfig
> + "$BOOTCONFIG" -a "$bconf_file" "$initramfs" > /dev/null
> +
> + # Run QEMU with timeout
> + local timeout_cmd=""
> + if command -v timeout >/dev/null 2>&1; then
> + timeout_cmd="timeout $TIMEOUT"
> + fi
> +
> + local logfile="$workdir/qemu.log"
> + $timeout_cmd "$QEMU" -kernel "$KERNEL" \
> + -initrd "$initramfs" \
> + -append "bootconfig console=ttyS0 quiet panic=-1" \
> + -nographic \
> + -no-reboot > "$logfile" 2>&1 || true
> +
> + if grep -q "TEST RESULT: PASS" "$logfile"; then
> + ktap_test_pass "$name"
> + else
> + ktap_test_fail "$name"
> + ktap_print_msg "QEMU Console Output for $name:"
> + while IFS= read -r line; do
> + ktap_print_msg "$line"
> + done < "$logfile"
> + fi
> +
> + rm -rf "$workdir"
> + trap - EXIT HUP INT TERM
> + return 0
> +}
> +
> +TEST_FILES=("$SCRIPT_DIR/bootconfigs"/*.bconf)
> +TOTAL_TESTS=0
> +for bconf in "${TEST_FILES[@]}"; do
> + name="$(basename "$bconf" .bconf)"
> + if [ "$TARGET_TEST" != "all" ] && [ "$TARGET_TEST" != "$name" ]; then
> + continue
> + fi
> + TOTAL_TESTS=$((TOTAL_TESTS + 1))
> +done
> +
> +ktap_print_header
> +ktap_set_plan "$TOTAL_TESTS"
> +
> +for bconf in "${TEST_FILES[@]}"; do
> + name="$(basename "$bconf" .bconf)"
> + test_script="$SCRIPT_DIR/tests/$name.sh"
> +
> + if [ "$TARGET_TEST" != "all" ] && [ "$TARGET_TEST" != "$name" ]; then
> + continue
> + fi
> +
> + if [ ! -f "$test_script" ]; then
> + ktap_test_skip "$name (test script missing)"
> + continue
> + fi
> +
> + run_single_test "$bconf" "$test_script"
> +done
> +
> +ktap_finished
> diff --git a/tools/testing/selftests/ftrace/boottime/tests/01-kprobe.sh b/tools/testing/selftests/ftrace/boottime/tests/01-kprobe.sh
> new file mode 100755
> index 000000000000..a20e7e82d158
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/tests/01-kprobe.sh
> @@ -0,0 +1,18 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# Check kprobe bootconfig settings on tracefs
> +TRACEDIR="/sys/kernel/tracing"
> +
> +if [ ! -d "$TRACEDIR/events/kprobes/vfs_read" ]; then
> + echo "FAIL: kprobe event kprobes/vfs_read does not exist"
> + exit 1
> +fi
> +
> +ENABLE=$(cat "$TRACEDIR/events/kprobes/vfs_read/enable")
> +if [ "$ENABLE" != "1" ]; then
> + echo "FAIL: kprobe event kprobes/vfs_read is not enabled ($ENABLE)"
> + exit 1
> +fi
> +
> +echo "PASS: 01-kprobe"
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/boottime/tests/02-synth.sh b/tools/testing/selftests/ftrace/boottime/tests/02-synth.sh
> new file mode 100755
> index 000000000000..46d3b152cbea
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/tests/02-synth.sh
> @@ -0,0 +1,18 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# Check synthetic event bootconfig settings on tracefs
> +TRACEDIR="/sys/kernel/tracing"
> +
> +if [ ! -d "$TRACEDIR/events/synthetic/boot_lat" ]; then
> + echo "FAIL: synthetic event synthetic/boot_lat does not exist"
> + exit 1
> +fi
> +
> +ENABLE=$(cat "$TRACEDIR/events/synthetic/boot_lat/enable")
> +if [ "$ENABLE" != "1" ]; then
> + echo "FAIL: synthetic event synthetic/boot_lat is not enabled ($ENABLE)"
> + exit 1
> +fi
> +
> +echo "PASS: 02-synth"
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/boottime/tests/03-eprobe.sh b/tools/testing/selftests/ftrace/boottime/tests/03-eprobe.sh
> new file mode 100755
> index 000000000000..108f9ba31c06
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/tests/03-eprobe.sh
> @@ -0,0 +1,18 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# Check eprobe event bootconfig settings on tracefs
> +TRACEDIR="/sys/kernel/tracing"
> +
> +if [ ! -d "$TRACEDIR/events/eprobes/ep_read" ]; then
> + echo "FAIL: eprobe event eprobes/ep_read does not exist"
> + exit 1
> +fi
> +
> +ENABLE=$(cat "$TRACEDIR/events/eprobes/ep_read/enable")
> +if [ "$ENABLE" != "1" ]; then
> + echo "FAIL: eprobe event eprobes/ep_read is not enabled ($ENABLE)"
> + exit 1
> +fi
> +
> +echo "PASS: 03-eprobe"
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/boottime/tests/04-fprobe.sh b/tools/testing/selftests/ftrace/boottime/tests/04-fprobe.sh
> new file mode 100755
> index 000000000000..c0a316bf7dde
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/tests/04-fprobe.sh
> @@ -0,0 +1,18 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# Check fprobe event bootconfig settings on tracefs
> +TRACEDIR="/sys/kernel/tracing"
> +
> +if [ ! -d "$TRACEDIR/events/fprobes/fp_read" ]; then
> + echo "FAIL: fprobe event fprobes/fp_read does not exist"
> + exit 1
> +fi
> +
> +ENABLE=$(cat "$TRACEDIR/events/fprobes/fp_read/enable")
> +if [ "$ENABLE" != "1" ]; then
> + echo "FAIL: fprobe event fprobes/fp_read is not enabled ($ENABLE)"
> + exit 1
> +fi
> +
> +echo "PASS: 04-fprobe"
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/boottime/tests/05-tprobe.sh b/tools/testing/selftests/ftrace/boottime/tests/05-tprobe.sh
> new file mode 100755
> index 000000000000..b29119b81e07
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/tests/05-tprobe.sh
> @@ -0,0 +1,18 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# Check tracepoint probe event bootconfig settings on tracefs
> +TRACEDIR="/sys/kernel/tracing"
> +
> +if [ ! -d "$TRACEDIR/events/tracepoints/tp_sched" ]; then
> + echo "FAIL: tracepoint probe event tracepoints/tp_sched does not exist"
> + exit 1
> +fi
> +
> +ENABLE=$(cat "$TRACEDIR/events/tracepoints/tp_sched/enable")
> +if [ "$ENABLE" != "1" ]; then
> + echo "FAIL: tracepoint probe event tracepoints/tp_sched is not enabled ($ENABLE)"
> + exit 1
> +fi
> +
> +echo "PASS: 05-tprobe"
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/boottime/tests/06-instance.sh b/tools/testing/selftests/ftrace/boottime/tests/06-instance.sh
> new file mode 100755
> index 000000000000..a95fdddaa6a6
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/boottime/tests/06-instance.sh
> @@ -0,0 +1,23 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# Check instance bootconfig settings on tracefs
> +TRACEDIR="/sys/kernel/tracing"
> +
> +if [ ! -d "$TRACEDIR/instances/foo" ]; then
> + echo "FAIL: trace instance foo does not exist"
> + exit 1
> +fi
> +
> +if [ ! -d "$TRACEDIR/instances/foo/events/sched/sched_switch" ]; then
> + echo "FAIL: event sched_switch does not exist in instance foo"
> + exit 1
> +fi
> +
> +ENABLE=$(cat "$TRACEDIR/instances/foo/events/sched/sched_switch/enable")
> +if [ "$ENABLE" != "1" ]; then
> + echo "FAIL: event sched_switch is not enabled in instance foo ($ENABLE)"
> + exit 1
> +fi
> +
> +echo "PASS: 06-instance"
> +exit 0
> diff --git a/tools/testing/selftests/ftrace/config b/tools/testing/selftests/ftrace/config
> index 544de0db5f58..fec41c6b290e 100644
> --- a/tools/testing/selftests/ftrace/config
> +++ b/tools/testing/selftests/ftrace/config
> @@ -1,3 +1,5 @@
> +CONFIG_BOOT_CONFIG=y
> +CONFIG_BOOTTIME_TRACING=y
> CONFIG_BPF_SYSCALL=y
> CONFIG_DEBUG_INFO_BTF=y
> CONFIG_DEBUG_INFO_DWARF4=y
> @@ -8,6 +10,7 @@ CONFIG_FTRACE=y
> CONFIG_FTRACE_SYSCALLS=y
> CONFIG_FUNCTION_GRAPH_RETVAL=y
> CONFIG_FUNCTION_PROFILER=y
> +CONFIG_FUNCTION_TRACER=y
> CONFIG_HIST_TRIGGERS=y
> CONFIG_IRQSOFF_TRACER=y
> CONFIG_KALLSYMS_ALL=y
> @@ -24,6 +27,7 @@ CONFIG_SAMPLE_TRACE_EVENTS=m
> CONFIG_SAMPLE_TRACE_PRINTK=m
> CONFIG_SCHED_TRACER=y
> CONFIG_STACK_TRACER=y
> +CONFIG_SYNTH_EVENTS=y
> CONFIG_TRACER_SNAPSHOT=y
> CONFIG_UPROBES=y
> CONFIG_UPROBE_EVENTS=y
>
--
Masami Hiramatsu (Google) <mhiramat@kernel.org>
prev parent reply other threads:[~2026-08-08 12:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-07 21:44 [PATCH v3 0/2] tracing/boot: Support eprobe, fprobe, and tprobe events and add test framework Masami Hiramatsu (Google)
2026-08-07 21:44 ` [PATCH v3 1/2] tracing/boot: Add support for eprobe, fprobe, and tprobe events Masami Hiramatsu (Google)
2026-08-07 21:44 ` [PATCH v3 2/2] selftests/ftrace: Add boot-time tracing test framework Masami Hiramatsu (Google)
2026-08-08 12:19 ` Masami Hiramatsu [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260808211957.f30d0194f1c0edc41b87529c@kernel.org \
--to=mhiramat@kernel.org \
--cc=corbet@lwn.net \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=linux-trace-kernel@vger.kernel.org \
--cc=mathieu.desnoyers@efficios.com \
--cc=rostedt@goodmis.org \
--cc=skhan@linuxfoundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.