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81f17c90f1
This way we'll be able to pass more test specific parameters without having to change this function signature. Will be used by the upcoming 'shell tests', shell scripts that will call perf tools and check if they work as expected, comparing its effects on the system (think 'perf probe foo') the output produced, etc. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Thomas Richter <tmricht@linux.vnet.ibm.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-wq250w7j1opbzyiynozuajbl@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
131 lines
3 KiB
C
131 lines
3 KiB
C
#include "evlist.h"
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#include "evsel.h"
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#include "thread_map.h"
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#include "cpumap.h"
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#include "tests.h"
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#include <errno.h>
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#include <signal.h>
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static int exited;
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static int nr_exit;
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static void sig_handler(int sig __maybe_unused)
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{
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exited = 1;
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}
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/*
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* perf_evlist__prepare_workload will send a SIGUSR1 if the fork fails, since
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* we asked by setting its exec_error to this handler.
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*/
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static void workload_exec_failed_signal(int signo __maybe_unused,
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siginfo_t *info __maybe_unused,
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void *ucontext __maybe_unused)
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{
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exited = 1;
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nr_exit = -1;
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}
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/*
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* This test will start a workload that does nothing then it checks
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* if the number of exit event reported by the kernel is 1 or not
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* in order to check the kernel returns correct number of event.
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*/
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int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused)
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{
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int err = -1;
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union perf_event *event;
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struct perf_evsel *evsel;
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struct perf_evlist *evlist;
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struct target target = {
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.uid = UINT_MAX,
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.uses_mmap = true,
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};
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const char *argv[] = { "true", NULL };
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char sbuf[STRERR_BUFSIZE];
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struct cpu_map *cpus;
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struct thread_map *threads;
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signal(SIGCHLD, sig_handler);
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evlist = perf_evlist__new_default();
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if (evlist == NULL) {
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pr_debug("perf_evlist__new_default\n");
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return -1;
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}
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/*
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* Create maps of threads and cpus to monitor. In this case
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* we start with all threads and cpus (-1, -1) but then in
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* perf_evlist__prepare_workload we'll fill in the only thread
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* we're monitoring, the one forked there.
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*/
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cpus = cpu_map__dummy_new();
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threads = thread_map__new_by_tid(-1);
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if (!cpus || !threads) {
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err = -ENOMEM;
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pr_debug("Not enough memory to create thread/cpu maps\n");
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goto out_free_maps;
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}
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perf_evlist__set_maps(evlist, cpus, threads);
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cpus = NULL;
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threads = NULL;
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err = perf_evlist__prepare_workload(evlist, &target, argv, false,
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workload_exec_failed_signal);
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if (err < 0) {
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pr_debug("Couldn't run the workload!\n");
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goto out_delete_evlist;
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}
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evsel = perf_evlist__first(evlist);
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evsel->attr.task = 1;
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evsel->attr.sample_freq = 1;
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evsel->attr.inherit = 0;
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evsel->attr.watermark = 0;
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evsel->attr.wakeup_events = 1;
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evsel->attr.exclude_kernel = 1;
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err = perf_evlist__open(evlist);
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if (err < 0) {
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pr_debug("Couldn't open the evlist: %s\n",
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str_error_r(-err, sbuf, sizeof(sbuf)));
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goto out_delete_evlist;
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}
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if (perf_evlist__mmap(evlist, 128, true) < 0) {
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pr_debug("failed to mmap events: %d (%s)\n", errno,
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str_error_r(errno, sbuf, sizeof(sbuf)));
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goto out_delete_evlist;
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}
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perf_evlist__start_workload(evlist);
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retry:
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while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
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if (event->header.type == PERF_RECORD_EXIT)
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nr_exit++;
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perf_evlist__mmap_consume(evlist, 0);
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}
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if (!exited || !nr_exit) {
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perf_evlist__poll(evlist, -1);
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goto retry;
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}
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if (nr_exit != 1) {
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pr_debug("received %d EXIT records\n", nr_exit);
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err = -1;
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}
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out_free_maps:
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cpu_map__put(cpus);
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thread_map__put(threads);
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out_delete_evlist:
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perf_evlist__delete(evlist);
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return err;
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}
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