diff options
| -rwxr-xr-x | tools/perf/tests/shell/trace_exit_race.sh | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/tools/perf/tests/shell/trace_exit_race.sh b/tools/perf/tests/shell/trace_exit_race.sh new file mode 100755 index 000000000000..3cf2d71a5c3b --- /dev/null +++ b/tools/perf/tests/shell/trace_exit_race.sh @@ -0,0 +1,31 @@ +#!/bin/sh +# perf trace exit race +# SPDX-License-Identifier: GPL-2.0 + +# Check that the last events of a perf trace'd subprocess are not +# lost. Specifically, trace the exiting syscall of "true" 10 times and ensure +# the output contains 10 correct lines. + +# shellcheck source=lib/probe.sh +. "$(dirname $0)"/lib/probe.sh + +skip_if_no_perf_trace || exit 2 + +trace_shutdown_race() { + for _ in $(seq 10); do + perf trace -e syscalls:sys_enter_exit_group true 2>>$file + done + [ "$(grep -c -E ' +[0-9]+\.[0-9]+ +true/[0-9]+ syscalls:sys_enter_exit_group\(\)$' $file)" = "10" ] +} + + +file=$(mktemp /tmp/temporary_file.XXXXX) + +# Do not use whatever ~/.perfconfig file, it may change the output +# via trace.{show_timestamp,show_prefix,etc} +export PERF_CONFIG=/dev/null + +trace_shutdown_race +err=$? +rm -f ${file} +exit $err |