+++ /dev/null
-/*
- * test_utils_compat_poll.c
- *
- * Unit tests for the compatibility layer of poll/epoll API.
- *
- * Copyright (C) 2019 Yannick Lamarre <ylamarre@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#include <inttypes.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-
-#include <tap/tap.h>
-
-#include <common/compat/poll.h>
-#include <common/readwrite.h>
-#include <common/pipe.h>
-#include <common/dynamic-array.h>
-
-/* Verification without trashing test order in the child process */
-#define childok(e, test, ...) do { \
- if (!(e)) { \
- diag(test, ## __VA_ARGS__); \
- _exit(EXIT_FAILURE); \
- } \
-} while(0)
-
-/* For error.h */
-int lttng_opt_quiet = 1;
-int lttng_opt_verbose;
-int lttng_opt_mi;
-
-/*
- * Non-zero 8-bits arbitrary value below 0x7f to ensure no sign extension
- * occurs. Used to verify that the value is properly propagated through the
- * pipe.
- */
-#define MAGIC_VALUE ((char) 0x5A)
-
-#ifdef HAVE_EPOLL
-#define NUM_TESTS 48
-#else
-#define NUM_TESTS 47
-#endif
-
-#ifdef HAVE_EPOLL
-#if defined(HAVE_EPOLL_CREATE1) && defined(EPOLL_CLOEXEC)
-#define CLOE_VALUE EPOLL_CLOEXEC
-#else
-#define CLOE_VALUE FD_CLOEXEC
-#endif
-
-static
-void test_epoll_compat(void)
-{
- /*
- * Type conversion present to disable warning of anonymous enum from
- * compiler.
- */
- ok((int) LTTNG_CLOEXEC == (int) CLOE_VALUE, "epoll's CLOEXEC value");
-}
-#endif
-
-static void test_alloc(void)
-{
- struct lttng_poll_event poll_events;
-
- lttng_poll_init(&poll_events);
-
- /* Null pointer */
- ok(lttng_poll_create(NULL, 1, 0) != 0, "Create over NULL pointer fails");
- /* Size 0 */
- ok(lttng_poll_create(&poll_events, 0, 0) != 0, "Create with size 0 fails");
- /* without CLOEXEC */
- ok(lttng_poll_create(&poll_events, 1, 0) == 0, "Create valid poll set succeeds");
- /*
- * lttng_poll_event structure untested due to incompatibility across
- * sublayers. lttng_poll_clean cannot be tested. There is no success
- * criteria. Verify set's max size cases.
- */
- lttng_poll_clean(&poll_events);
-}
-
-/* Tests stuff related to what would be handled with epoll_ctl. */
-static void test_add_del(void)
-{
- struct lttng_poll_event poll_events;
-
- lttng_poll_init(&poll_events);
- ok(lttng_poll_add(NULL, 1, LPOLLIN) != 0, "Adding to NULL set fails");
- ok(lttng_poll_add(&poll_events, 1, LPOLLIN) != 0, "Adding to uninitialized structure fails");
- ok(lttng_poll_add(&poll_events, -1, LPOLLIN) != 0, "Adding invalid FD fails");
-
- ok(lttng_poll_create(&poll_events, 1, 0) == 0, "Create a poll set succeeds");
- ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Set created empty");
-
- ok(lttng_poll_add(NULL, 1, LPOLLIN) != 0, "Adding to NULL set fails");
- ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Set still empty");
- ok(lttng_poll_add(&poll_events, -1, LPOLLIN) != 0, "Adding invalid FD fails");
- ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Set still empty");
-
- ok(lttng_poll_add(&poll_events, 1, LPOLLIN) == 0, "Adding valid FD succeeds");
- ok(LTTNG_POLL_GETNB(&poll_events) == 1, "Nb of elements incremented");
-
- ok(lttng_poll_del(NULL, 1) != 0, "Removing from NULL set fails");
- ok(LTTNG_POLL_GETNB(&poll_events) == 1, "Number of FD in set unchanged");
-
- ok(lttng_poll_del(&poll_events, -1) != 0, "Removing from negative FD fails");
- ok(LTTNG_POLL_GETNB(&poll_events) == 1, "Number of FD in set unchanged");
-
- ok(lttng_poll_del(&poll_events, 2) == 0, "Removing invalid FD still succeeds");
- ok(LTTNG_POLL_GETNB(&poll_events) == 1, "Number of elements unchanged");
-
- ok(lttng_poll_del(&poll_events, 1) == 0, "Removing valid FD succeeds");
- ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Nb of elements decremented");
-
- ok(lttng_poll_del(&poll_events, 1) != 0, "Removing from empty set fails");
- ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Nb of elements unchanged");
-
- lttng_poll_clean(&poll_events);
-}
-
-static void test_mod_wait(void)
-{
- struct lttng_poll_event poll_events;
- struct lttng_poll_event cpoll_events;
- int hupfd[2];
- int infd[2];
- pid_t cpid;
- char rbuf = 0, tbuf = MAGIC_VALUE;
- int wstatus;
-
- lttng_poll_init(&poll_events);
- lttng_poll_init(&cpoll_events);
-
- ok(pipe(hupfd) != -1, "pipe function succeeds");
- ok(pipe(infd) != -1, "pipe function succeeds");
-
- cpid = fork();
- if (cpid == 0) {
- childok(lttng_poll_create(&cpoll_events, 1, 0) == 0, "Create valid poll set succeeds");
- childok(lttng_poll_mod(NULL, infd[0], LPOLLIN) == -1, "lttng_poll_mod with invalid input returns an error");
- childok(lttng_poll_mod(&cpoll_events, infd[0], LPOLLIN) == -1, "lttng_poll_mod with invalid input returns an error");
- childok(lttng_poll_add(&cpoll_events, infd[0], LPOLLHUP) == 0, "Add valid FD succeeds");
- childok(lttng_poll_mod(&cpoll_events, -1, LPOLLIN) == -1, "lttng_poll_mod with invalid input returns an error");
- childok(lttng_poll_mod(&cpoll_events, hupfd[0], LPOLLIN) == 0, "lttng_poll_mod on unincluded FD goes on");
- childok(lttng_poll_mod(&cpoll_events, infd[0], LPOLLIN) == 0, "Modify event type succeeds");
- childok(close(infd[1]) == 0, "Close valid FD succeeds");
- childok(lttng_poll_wait(&cpoll_events, -1) == 1, "Wait on close times out");
- childok(lttng_read(infd[0], &rbuf, 1) == 1, "Data is present in the pipe");
- childok(rbuf == MAGIC_VALUE, "Received data is consistent with transmitted data");
- childok(lttng_poll_del(&cpoll_events, infd[0]) == 0, "Removing valid FD succeeds");
- childok(close(infd[0]) == 0, "Close valid FD succeeds");
- childok(close(hupfd[0]) == 0, "Close valid FD succeeds");
- childok(close(hupfd[1]) == 0, "Close valid FD succeeds");
- lttng_poll_clean(&cpoll_events);
- _exit(EXIT_SUCCESS);
- } else {
- ok(close(hupfd[1]) == 0, "Close valid FD succeeds");
- ok(close(infd[0]) == 0, "Close valid FD succeeds");
-
- ok(lttng_poll_wait(NULL, -1) == -1, "lttng_poll_wait call with invalid input returns error");
-
- ok(lttng_poll_create(&poll_events, 1, 0) == 0, "Create valid poll set succeeds");
- ok(lttng_poll_wait(&poll_events, -1) == -1, "lttng_poll_wait call with invalid input returns error");
- ok(lttng_poll_add(&poll_events, hupfd[0], LPOLLHUP) == 0, "Add valid FD succeeds");
- ok(lttng_write(infd[1], &tbuf, 1) == 1, "Write to pipe succeeds");
- ok(lttng_poll_wait(&poll_events, -1) == 1, "Wakes up on one event");
- ok(lttng_poll_del(&poll_events, hupfd[0]) == 0, "Removing valid FD succeeds");
- ok(close(hupfd[0]) == 0, "Close valid FD succeeds");
- ok(close(infd[1]) == 0, "Close valid FD succeeds");
- lttng_poll_clean(&poll_events);
- ok(waitpid(cpid, &wstatus, 0) == cpid, "Wait for child exit");
- ok(WIFEXITED(wstatus) == 1, "Child process exited");
- ok(WEXITSTATUS(wstatus) == EXIT_SUCCESS, "Child process exited with EXIT_SUCCESS");
- }
-}
-
-static void destroy_pipe(void *pipe)
-{
- lttng_pipe_destroy(pipe);
-}
-
-static int run_active_set_combination(unsigned int fd_count,
- unsigned int active_fds_mask)
-{
- int ret = 0;
- unsigned int i;
- const unsigned int active_fds_count = __builtin_popcount(active_fds_mask);
- struct lttng_poll_event poll_events;
- struct lttng_dynamic_pointer_array pipes;
- struct lttng_pipe *pipe = NULL;
-
- lttng_poll_init(&poll_events);
- lttng_dynamic_pointer_array_init(&pipes, destroy_pipe);
-
- ret = lttng_poll_create(&poll_events, fd_count, 0);
- if (ret) {
- diag("Failed to create poll set for %u file descriptors",
- fd_count);
- goto end;
- }
-
- for (i = 0; i < fd_count; i++) {
- pipe = lttng_pipe_open(0);
-
- if (!pipe) {
- diag("Failed to allocate pipe");
- ret = -1;
- goto end;
- }
-
- ret = lttng_poll_add(&poll_events, lttng_pipe_get_readfd(pipe),
- LPOLLIN);
- if (ret) {
- diag("Failed to add file descriptor to poll set");
- ret = -1;
- goto end;
- }
-
- ret = lttng_dynamic_pointer_array_add_pointer(&pipes, pipe);
- if (ret) {
- diag("Failed to add pipe to pipes array");
- ret = -1;
- goto end;
- }
-
- /* Ownership transferred to the pointer array. */
- pipe = NULL;
- }
-
- /* Write one byte for all active fds that should be active. */
- for (i = 0; i < fd_count; i++) {
- struct lttng_pipe *borrowed_pipe;
-
- /* Should this fd be made active? */
- if (!(active_fds_mask & (1 << i))) {
- continue;
- }
-
- borrowed_pipe = lttng_dynamic_pointer_array_get_pointer(
- &pipes, i);
-
- ret = lttng_pipe_write(
- borrowed_pipe, &(char){'a'}, sizeof(char));
- if (ret != sizeof(char)) {
- diag("Failed to write to pipe");
- ret = -1;
- goto end;
- }
- }
-
- ret = lttng_poll_wait(&poll_events, 0);
- if (ret != active_fds_count) {
- diag("lttng_poll_wait returned %d, expected %u active file descriptors",
- ret, active_fds_count);
- ret = -1;
- goto end;
- } else {
- /* Success! */
- ret = 0;
- }
-
-end:
- lttng_dynamic_pointer_array_reset(&pipes);
- lttng_poll_clean(&poll_events);
- lttng_pipe_destroy(pipe);
- return ret;
-}
-
-static void test_active_set_combinations(unsigned int fd_count)
-{
- unsigned int i, all_active_mask = 0;
-
- /* Do you really want to test more than 4,294,967,295 combinations? */
- LTTNG_ASSERT(fd_count <= 32);
-
- for (i = 0; i < fd_count; i++) {
- all_active_mask |= (1 << i);
- }
-
- for (i = 0; i <= all_active_mask; i++) {
- const int ret = run_active_set_combination(fd_count, i);
-
- if (ret) {
- goto fail;
- }
- }
-
- pass("Test all combinations of active file descriptors for %u file descriptors", fd_count);
- return;
-fail:
- fail("Test all combinations of active file descriptors for %u file descriptors", fd_count);
-}
-
-static void test_func_def(void)
-{
-#ifdef LTTNG_POLL_GETFD
-#define PASS_GETFD 1
-#else
-#define PASS_GETFD 0
-#endif
-
-#ifdef LTTNG_POLL_GETEV
-#define PASS_GETEV 1
-#else
-#define PASS_GETEV 0
-#endif
-
-#ifdef LTTNG_POLL_GETSZ
-#define PASS_GETSZ 1
-#else
-#define PASS_GETSZ 0
-#endif
-
-#ifdef LTTNG_POLL_GET_PREV_FD
-#define PASS_GET_PREV_FD 1
-#else
-#define PASS_GET_PREV_FD 0
-#endif
-
- ok(lttng_poll_reset == lttng_poll_reset, "lttng_poll_reset is defined");
- ok(lttng_poll_init == lttng_poll_init , "lttng_poll_init is defined");
- ok(PASS_GETFD, "GETFD is defined");
- ok(PASS_GETEV, "GETEV is defined");
- ok(PASS_GETSZ, "GETSZ is defined");
- ok(PASS_GET_PREV_FD, "GET_PREV_FD is defined");
-}
-
-int main(void)
-{
- plan_tests(NUM_TESTS);
-#ifdef HAVE_EPOLL
- test_epoll_compat();
-#endif
- test_func_def();
- test_alloc();
- test_add_del();
- test_mod_wait();
- test_active_set_combinations(8);
- return exit_status();
-}
projects / lttng-tools.git / blobdiff