tools/perf/tests/evlist.c

#include "util/evlist.h"
#include "util/debug.h"
#include "util/thread_map.h"
#include "util/cpumap.h"
#include "tests/tests.h"

static void perf_evlist__init_pollfd(struct perf_evlist *evlist,
				     int nr_fds_alloc, short revents)
{
	int fd;

	evlist->nr_fds = nr_fds_alloc;

	for (fd = 0; fd < nr_fds_alloc; ++fd) {
		evlist->pollfd[fd].fd	   = nr_fds_alloc - fd;
		evlist->pollfd[fd].revents = revents;
	}
}

static int perf_evlist__fprintf_pollfd(struct perf_evlist *evlist,
				       const char *prefix, FILE *fp)
{
	int printed = 0, fd;

	if (!verbose)
		return 0;

	printed += fprintf(fp, "\n%s: %3d [ ", prefix, evlist->nr_fds);
	for (fd = 0; fd < evlist->nr_fds; ++fd)
		printed += fprintf(fp, "%s%d", fd ? ", " : "", evlist->pollfd[fd].fd);
	printed += fprintf(fp, " ]");
	return printed;
}

int test__perf_evlist__filter_pollfd(void)
{
	const int nr_fds_alloc = 5;
	int nr_fds, expected_fd[2], fd;
	struct pollfd pollfd[nr_fds_alloc];
	struct perf_evlist evlist_alloc = {
		.pollfd	= pollfd,
	}, *evlist = &evlist_alloc;

	perf_evlist__init_pollfd(evlist, nr_fds_alloc, POLLIN);
	nr_fds = perf_evlist__filter_pollfd(evlist, POLLHUP);
	if (nr_fds != nr_fds_alloc) {
		pr_debug("\nperf_evlist__filter_pollfd()=%d != %d shouldn't have filtered anything",
			 nr_fds, nr_fds_alloc);
		return TEST_FAIL;
	}

	perf_evlist__init_pollfd(evlist, nr_fds_alloc, POLLHUP);
	nr_fds = perf_evlist__filter_pollfd(evlist, POLLHUP);
	if (nr_fds != 0) {
		pr_debug("\nperf_evlist__filter_pollfd()=%d != %d, should have filtered all fds",
			 nr_fds, nr_fds_alloc);
		return TEST_FAIL;
	}

	perf_evlist__init_pollfd(evlist, nr_fds_alloc, POLLHUP);
	pollfd[2].revents = POLLIN;
	expected_fd[0] = pollfd[2].fd;

	pr_debug("\nfiltering all but pollfd[2]:");
	perf_evlist__fprintf_pollfd(evlist, "before", stderr);
	nr_fds = perf_evlist__filter_pollfd(evlist, POLLHUP);
	perf_evlist__fprintf_pollfd(evlist, " after", stderr);
	if (nr_fds != 1) {
		pr_debug("\nperf_evlist__filter_pollfd()=%d != 1, should have left just one event",
			 nr_fds);
		return TEST_FAIL;
	}

	if (pollfd[0].fd != expected_fd[0]) {
		pr_debug("\npollfd[0].fd=%d != %d\n", pollfd[0].fd, expected_fd[0]);
		return TEST_FAIL;
	}

	perf_evlist__init_pollfd(evlist, nr_fds_alloc, POLLHUP);
	pollfd[0].revents = POLLIN;
	expected_fd[0] = pollfd[0].fd;
	pollfd[3].revents = POLLIN;
	expected_fd[1] = pollfd[3].fd;

	pr_debug("\nfiltering all but (pollfd[0], pollfd[3]):");
	perf_evlist__fprintf_pollfd(evlist, "before", stderr);
	nr_fds = perf_evlist__filter_pollfd(evlist, POLLHUP);
	perf_evlist__fprintf_pollfd(evlist, " after", stderr);
	if (nr_fds != 2) {
		pr_debug("\nperf_evlist__filter_pollfd()=%d != 2, should have left just two events",
			 nr_fds);
		return TEST_FAIL;
	}

	for (fd = 0; fd < 2; ++fd) {
		if (pollfd[fd].fd != expected_fd[fd]) {
			pr_debug("\npollfd[%d].fd=%d != %d\n", fd, pollfd[fd].fd, expected_fd[fd]);
			return TEST_FAIL;
		}
	}

	pr_debug("\n");

	return 0;
}

int test__perf_evlist__add_pollfd(void)
{
	struct perf_evsel evsel = {
		.system_wide = false,
	};
	struct thread_map threads = {
		.nr = 2,
	};
	struct perf_evlist evlist_alloc = {
		.pollfd	 = NULL,
		.threads = &threads,
	}, *evlist = &evlist_alloc;

	INIT_LIST_HEAD(&evlist->entries);
	list_add(&evsel.node, &evlist->entries);

	if (perf_evlist__alloc_pollfd(evlist) < 0) {
		pr_debug("\nperf_evlist__alloc_pollfd(evlist) failed!");
		return TEST_FAIL;
	}

	if (evlist->nr_fds_alloc != threads.nr) {
		pr_debug("\n_evlist__alloc_pollfd: nr_fds_alloc=%d != (threads->nr(%d) * cpu_map->nr(%d))=%d",
			 evlist->nr_fds_alloc, thread_map__nr(evlist->threads), cpu_map__nr(evlist->cpus),
			 thread_map__nr(evlist->threads) * cpu_map__nr(evlist->cpus));
		return TEST_FAIL;
	}

	if (perf_evlist__add_pollfd(evlist, 1) < 0) {
		pr_debug("\nperf_evlist__add_pollfd(evlist, 1) failed!");
		return TEST_FAIL;
	}

	if (evlist->nr_fds != 1) {
		pr_debug("\nperf_evlist__add_pollfd(evlist, 1)=%d != 1", evlist->nr_fds);
		return TEST_FAIL;
	}

	if (perf_evlist__add_pollfd(evlist, 2) < 0) {
		pr_debug("\nperf_evlist__add_pollfd(evlist, 2) failed!");
		return TEST_FAIL;
	}

	if (evlist->nr_fds != 2) {
		pr_debug("\nperf_evlist__add_pollfd(evlist, 2)=%d != 2", evlist->nr_fds);
		return TEST_FAIL;
	}

	perf_evlist__fprintf_pollfd(evlist, "before growing array", stderr);

	if (perf_evlist__add_pollfd(evlist, 35) < 0) {
		pr_debug("\nperf_evlist__add_pollfd(evlist, 35) failed!");
		return TEST_FAIL;
	}

	if (evlist->nr_fds != 3) {
		pr_debug("\nperf_evlist__add_pollfd(evlist, 35)=%d != 3", evlist->nr_fds);
		return TEST_FAIL;
	}

	if (evlist->pollfd == NULL) {
		pr_debug("\nperf_evlist__add_pollfd(evlist, 35) should have allocated evlist->pollfd!");
		return TEST_FAIL;
	}

	perf_evlist__fprintf_pollfd(evlist, "after 3rd add_pollfd", stderr);

	if (evlist->pollfd[2].fd != 35) {
		pr_debug("\nevlist->pollfd[2](%d) != 35!", evlist->pollfd[2].fd);
		return TEST_FAIL;
	}

	if (perf_evlist__add_pollfd(evlist, 88) < 0) {
		pr_debug("\nperf_evlist__add_pollfd(evlist, 88) failed!");
		return TEST_FAIL;
	}

	if (evlist->nr_fds != 4) {
		pr_debug("\nperf_evlist__add_pollfd(evlist, 88)=%d != 2", evlist->nr_fds);
		return TEST_FAIL;
	}

	perf_evlist__fprintf_pollfd(evlist, "after 4th add_pollfd", stderr);

	if (evlist->pollfd[0].fd != 1) {
		pr_debug("\nevlist->pollfd[0](%d) != 1!", evlist->pollfd[0].fd);
		return TEST_FAIL;
	}

	if (evlist->pollfd[1].fd != 2) {
		pr_debug("\nevlist->pollfd[1](%d) != 2!", evlist->pollfd[1].fd);
		return TEST_FAIL;
	}

	if (evlist->pollfd[2].fd != 35) {
		pr_debug("\nevlist->pollfd[2](%d) != 35!", evlist->pollfd[2].fd);
		return TEST_FAIL;
	}

	if (evlist->pollfd[3].fd != 88) {
		pr_debug("\nevlist->pollfd[3](%d) != 88!", evlist->pollfd[3].fd);
		return TEST_FAIL;
	}

	pr_debug("\n");

	return 0;
}