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#!/bin/sh # perf pipe recording and injection test # SPDX-License-Identifier: GPL-2.0 # skip if there's no compiler if ! [ -x "$(command -v cc)" ]; then echo "failed: no compiler, install gcc" exit 2 fi file=$(mktemp /tmp/test.file.XXXXXX) data=$(mktemp /tmp/perf.data.XXXXXX) cat < #include #include volatile int done; void sigalrm(int sig) { done = 1; } __attribute__((noinline)) void noploop(void) { while (!done) continue; } int main(int argc, char *argv[]) { int sec = 1; if (argc > 1) sec = atoi(argv[1]); signal(SIGALRM, sigalrm); alarm(sec); noploop(); return 0; } EOF if ! perf record -e task-clock:u -o - ${file} | perf report -i - --task | grep test.file; then echo "cannot find the test file in the perf report" exit 1 fi if ! perf record -e task-clock:u -o - ${file} | perf inject -b | perf report -i - | grep noploop; then echo "cannot find noploop function in pipe #1" exit 1 fi perf record -e task-clock:u -o - ${file} | perf inject -