67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
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#include "thread_map.h"
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#include "evsel.h"
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#include "debug.h"
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#include "tests.h"
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int test__open_syscall_event(void)
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{
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int err = -1, fd;
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struct thread_map *threads;
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struct perf_evsel *evsel;
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struct perf_event_attr attr;
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unsigned int nr_open_calls = 111, i;
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int id = trace_event__id("sys_enter_open");
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if (id < 0) {
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pr_debug("is debugfs mounted on /sys/kernel/debug?\n");
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return -1;
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}
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threads = thread_map__new(-1, getpid(), UINT_MAX);
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if (threads == NULL) {
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pr_debug("thread_map__new\n");
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return -1;
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}
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memset(&attr, 0, sizeof(attr));
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attr.type = PERF_TYPE_TRACEPOINT;
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attr.config = id;
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evsel = perf_evsel__new(&attr, 0);
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if (evsel == NULL) {
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pr_debug("perf_evsel__new\n");
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goto out_thread_map_delete;
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}
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if (perf_evsel__open_per_thread(evsel, threads) < 0) {
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pr_debug("failed to open counter: %s, "
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"tweak /proc/sys/kernel/perf_event_paranoid?\n",
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strerror(errno));
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goto out_evsel_delete;
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}
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for (i = 0; i < nr_open_calls; ++i) {
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fd = open("/etc/passwd", O_RDONLY);
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close(fd);
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}
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if (perf_evsel__read_on_cpu(evsel, 0, 0) < 0) {
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pr_debug("perf_evsel__read_on_cpu\n");
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goto out_close_fd;
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}
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if (evsel->counts->cpu[0].val != nr_open_calls) {
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pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
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nr_open_calls, evsel->counts->cpu[0].val);
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goto out_close_fd;
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}
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err = 0;
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out_close_fd:
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perf_evsel__close_fd(evsel, 1, threads->nr);
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out_evsel_delete:
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perf_evsel__delete(evsel);
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out_thread_map_delete:
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thread_map__delete(threads);
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return err;
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}
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