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-rw-r--r--tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c3380
1 files changed, 3380 insertions, 0 deletions
diff --git a/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
new file mode 100644
index 000000000..8f82f99f7
--- /dev/null
+++ b/tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
@@ -0,0 +1,3380 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#define _GNU_SOURCE
+#include <poll.h>
+#include <unistd.h>
+#include <assert.h>
+#include <signal.h>
+#include <pthread.h>
+#include <sys/epoll.h>
+#include <sys/socket.h>
+#include <sys/eventfd.h>
+#include "../../kselftest_harness.h"
+
+struct epoll_mtcontext
+{
+ int efd[3];
+ int sfd[4];
+ volatile int count;
+
+ pthread_t main;
+ pthread_t waiter;
+};
+
+static void signal_handler(int signum)
+{
+}
+
+static void kill_timeout(struct epoll_mtcontext *ctx)
+{
+ usleep(1000000);
+ pthread_kill(ctx->main, SIGUSR1);
+ pthread_kill(ctx->waiter, SIGUSR1);
+}
+
+static void *waiter_entry1a(void *data)
+{
+ struct epoll_event e;
+ struct epoll_mtcontext *ctx = data;
+
+ if (epoll_wait(ctx->efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx->count, 1);
+
+ return NULL;
+}
+
+static void *waiter_entry1ap(void *data)
+{
+ struct pollfd pfd;
+ struct epoll_event e;
+ struct epoll_mtcontext *ctx = data;
+
+ pfd.fd = ctx->efd[0];
+ pfd.events = POLLIN;
+ if (poll(&pfd, 1, -1) > 0) {
+ if (epoll_wait(ctx->efd[0], &e, 1, 0) > 0)
+ __sync_fetch_and_add(&ctx->count, 1);
+ }
+
+ return NULL;
+}
+
+static void *waiter_entry1o(void *data)
+{
+ struct epoll_event e;
+ struct epoll_mtcontext *ctx = data;
+
+ if (epoll_wait(ctx->efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_or(&ctx->count, 1);
+
+ return NULL;
+}
+
+static void *waiter_entry1op(void *data)
+{
+ struct pollfd pfd;
+ struct epoll_event e;
+ struct epoll_mtcontext *ctx = data;
+
+ pfd.fd = ctx->efd[0];
+ pfd.events = POLLIN;
+ if (poll(&pfd, 1, -1) > 0) {
+ if (epoll_wait(ctx->efd[0], &e, 1, 0) > 0)
+ __sync_fetch_and_or(&ctx->count, 1);
+ }
+
+ return NULL;
+}
+
+static void *waiter_entry2a(void *data)
+{
+ struct epoll_event events[2];
+ struct epoll_mtcontext *ctx = data;
+
+ if (epoll_wait(ctx->efd[0], events, 2, -1) > 0)
+ __sync_fetch_and_add(&ctx->count, 1);
+
+ return NULL;
+}
+
+static void *waiter_entry2ap(void *data)
+{
+ struct pollfd pfd;
+ struct epoll_event events[2];
+ struct epoll_mtcontext *ctx = data;
+
+ pfd.fd = ctx->efd[0];
+ pfd.events = POLLIN;
+ if (poll(&pfd, 1, -1) > 0) {
+ if (epoll_wait(ctx->efd[0], events, 2, 0) > 0)
+ __sync_fetch_and_add(&ctx->count, 1);
+ }
+
+ return NULL;
+}
+
+static void *emitter_entry1(void *data)
+{
+ struct epoll_mtcontext *ctx = data;
+
+ usleep(100000);
+ write(ctx->sfd[1], "w", 1);
+
+ kill_timeout(ctx);
+
+ return NULL;
+}
+
+static void *emitter_entry2(void *data)
+{
+ struct epoll_mtcontext *ctx = data;
+
+ usleep(100000);
+ write(ctx->sfd[1], "w", 1);
+ write(ctx->sfd[3], "w", 1);
+
+ kill_timeout(ctx);
+
+ return NULL;
+}
+
+/*
+ * t0
+ * | (ew)
+ * e0
+ * | (lt)
+ * s0
+ */
+TEST(epoll1)
+{
+ int efd;
+ int sfd[2];
+ struct epoll_event e;
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sfd), 0);
+
+ efd = epoll_create(1);
+ ASSERT_GE(efd, 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd, EPOLL_CTL_ADD, sfd[0], &e), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+
+ EXPECT_EQ(epoll_wait(efd, &e, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd, &e, 1, 0), 1);
+
+ close(efd);
+ close(sfd[0]);
+ close(sfd[1]);
+}
+
+/*
+ * t0
+ * | (ew)
+ * e0
+ * | (et)
+ * s0
+ */
+TEST(epoll2)
+{
+ int efd;
+ int sfd[2];
+ struct epoll_event e;
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sfd), 0);
+
+ efd = epoll_create(1);
+ ASSERT_GE(efd, 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd, EPOLL_CTL_ADD, sfd[0], &e), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+
+ EXPECT_EQ(epoll_wait(efd, &e, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd, &e, 1, 0), 0);
+
+ close(efd);
+ close(sfd[0]);
+ close(sfd[1]);
+}
+
+/*
+ * t0
+ * | (ew)
+ * e0
+ * (lt) / \ (lt)
+ * s0 s2
+ */
+TEST(epoll3)
+{
+ int efd;
+ int sfd[4];
+ struct epoll_event events[2];
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[2]), 0);
+
+ efd = epoll_create(1);
+ ASSERT_GE(efd, 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd, EPOLL_CTL_ADD, sfd[0], events), 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd, EPOLL_CTL_ADD, sfd[2], events), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+ ASSERT_EQ(write(sfd[3], "w", 1), 1);
+
+ EXPECT_EQ(epoll_wait(efd, events, 2, 0), 2);
+ EXPECT_EQ(epoll_wait(efd, events, 2, 0), 2);
+
+ close(efd);
+ close(sfd[0]);
+ close(sfd[1]);
+ close(sfd[2]);
+ close(sfd[3]);
+}
+
+/*
+ * t0
+ * | (ew)
+ * e0
+ * (et) / \ (et)
+ * s0 s2
+ */
+TEST(epoll4)
+{
+ int efd;
+ int sfd[4];
+ struct epoll_event events[2];
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[2]), 0);
+
+ efd = epoll_create(1);
+ ASSERT_GE(efd, 0);
+
+ events[0].events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd, EPOLL_CTL_ADD, sfd[0], events), 0);
+
+ events[0].events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd, EPOLL_CTL_ADD, sfd[2], events), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+ ASSERT_EQ(write(sfd[3], "w", 1), 1);
+
+ EXPECT_EQ(epoll_wait(efd, events, 2, 0), 2);
+ EXPECT_EQ(epoll_wait(efd, events, 2, 0), 0);
+
+ close(efd);
+ close(sfd[0]);
+ close(sfd[1]);
+ close(sfd[2]);
+ close(sfd[3]);
+}
+
+/*
+ * t0
+ * | (p)
+ * e0
+ * | (lt)
+ * s0
+ */
+TEST(epoll5)
+{
+ int efd;
+ int sfd[2];
+ struct pollfd pfd;
+ struct epoll_event e;
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[0]), 0);
+
+ efd = epoll_create(1);
+ ASSERT_GE(efd, 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd, EPOLL_CTL_ADD, sfd[0], &e), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+
+ pfd.fd = efd;
+ pfd.events = POLLIN;
+ ASSERT_EQ(poll(&pfd, 1, 0), 1);
+ ASSERT_EQ(epoll_wait(efd, &e, 1, 0), 1);
+
+ pfd.fd = efd;
+ pfd.events = POLLIN;
+ ASSERT_EQ(poll(&pfd, 1, 0), 1);
+ ASSERT_EQ(epoll_wait(efd, &e, 1, 0), 1);
+
+ close(efd);
+ close(sfd[0]);
+ close(sfd[1]);
+}
+
+/*
+ * t0
+ * | (p)
+ * e0
+ * | (et)
+ * s0
+ */
+TEST(epoll6)
+{
+ int efd;
+ int sfd[2];
+ struct pollfd pfd;
+ struct epoll_event e;
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[0]), 0);
+
+ efd = epoll_create(1);
+ ASSERT_GE(efd, 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd, EPOLL_CTL_ADD, sfd[0], &e), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+
+ pfd.fd = efd;
+ pfd.events = POLLIN;
+ ASSERT_EQ(poll(&pfd, 1, 0), 1);
+ ASSERT_EQ(epoll_wait(efd, &e, 1, 0), 1);
+
+ pfd.fd = efd;
+ pfd.events = POLLIN;
+ ASSERT_EQ(poll(&pfd, 1, 0), 0);
+ ASSERT_EQ(epoll_wait(efd, &e, 1, 0), 0);
+
+ close(efd);
+ close(sfd[0]);
+ close(sfd[1]);
+}
+
+/*
+ * t0
+ * | (p)
+ * e0
+ * (lt) / \ (lt)
+ * s0 s2
+ */
+
+TEST(epoll7)
+{
+ int efd;
+ int sfd[4];
+ struct pollfd pfd;
+ struct epoll_event events[2];
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[2]), 0);
+
+ efd = epoll_create(1);
+ ASSERT_GE(efd, 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd, EPOLL_CTL_ADD, sfd[0], events), 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd, EPOLL_CTL_ADD, sfd[2], events), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+ ASSERT_EQ(write(sfd[3], "w", 1), 1);
+
+ pfd.fd = efd;
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd, events, 2, 0), 2);
+
+ pfd.fd = efd;
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd, events, 2, 0), 2);
+
+ close(efd);
+ close(sfd[0]);
+ close(sfd[1]);
+ close(sfd[2]);
+ close(sfd[3]);
+}
+
+/*
+ * t0
+ * | (p)
+ * e0
+ * (et) / \ (et)
+ * s0 s2
+ */
+TEST(epoll8)
+{
+ int efd;
+ int sfd[4];
+ struct pollfd pfd;
+ struct epoll_event events[2];
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[2]), 0);
+
+ efd = epoll_create(1);
+ ASSERT_GE(efd, 0);
+
+ events[0].events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd, EPOLL_CTL_ADD, sfd[0], events), 0);
+
+ events[0].events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd, EPOLL_CTL_ADD, sfd[2], events), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+ ASSERT_EQ(write(sfd[3], "w", 1), 1);
+
+ pfd.fd = efd;
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd, events, 2, 0), 2);
+
+ pfd.fd = efd;
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 0);
+ EXPECT_EQ(epoll_wait(efd, events, 2, 0), 0);
+
+ close(efd);
+ close(sfd[0]);
+ close(sfd[1]);
+ close(sfd[2]);
+ close(sfd[3]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (ew)
+ * e0
+ * | (lt)
+ * s0
+ */
+TEST(epoll9)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1a, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (ew)
+ * e0
+ * | (et)
+ * s0
+ */
+TEST(epoll10)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1a, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 1);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (ew)
+ * e0
+ * (lt) / \ (lt)
+ * s0 s2
+ */
+TEST(epoll11)
+{
+ pthread_t emitter;
+ struct epoll_event events[2];
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[2]), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.sfd[0], events), 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.sfd[2], events), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry2a, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry2, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], events, 2, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+ close(ctx.sfd[2]);
+ close(ctx.sfd[3]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (ew)
+ * e0
+ * (et) / \ (et)
+ * s0 s2
+ */
+TEST(epoll12)
+{
+ pthread_t emitter;
+ struct epoll_event events[2];
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[2]), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ events[0].events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.sfd[0], events), 0);
+
+ events[0].events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.sfd[2], events), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1a, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry2, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], events, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+ close(ctx.sfd[2]);
+ close(ctx.sfd[3]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (p)
+ * e0
+ * | (lt)
+ * s0
+ */
+TEST(epoll13)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (p)
+ * e0
+ * | (et)
+ * s0
+ */
+TEST(epoll14)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 1);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (p)
+ * e0
+ * (lt) / \ (lt)
+ * s0 s2
+ */
+TEST(epoll15)
+{
+ pthread_t emitter;
+ struct epoll_event events[2];
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[2]), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.sfd[0], events), 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.sfd[2], events), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry2ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry2, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], events, 2, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+ close(ctx.sfd[2]);
+ close(ctx.sfd[3]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (p)
+ * e0
+ * (et) / \ (et)
+ * s0 s2
+ */
+TEST(epoll16)
+{
+ pthread_t emitter;
+ struct epoll_event events[2];
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[2]), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ events[0].events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.sfd[0], events), 0);
+
+ events[0].events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.sfd[2], events), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry2, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], events, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+ close(ctx.sfd[2]);
+ close(ctx.sfd[3]);
+}
+
+/*
+ * t0
+ * | (ew)
+ * e0
+ * | (lt)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll17)
+{
+ int efd[2];
+ int sfd[2];
+ struct epoll_event e;
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sfd), 0);
+
+ efd[0] = epoll_create(1);
+ ASSERT_GE(efd[0], 0);
+
+ efd[1] = epoll_create(1);
+ ASSERT_GE(efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[1], EPOLL_CTL_ADD, sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[1], &e), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 1);
+
+ close(efd[0]);
+ close(efd[1]);
+ close(sfd[0]);
+ close(sfd[1]);
+}
+
+/*
+ * t0
+ * | (ew)
+ * e0
+ * | (lt)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll18)
+{
+ int efd[2];
+ int sfd[2];
+ struct epoll_event e;
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sfd), 0);
+
+ efd[0] = epoll_create(1);
+ ASSERT_GE(efd[0], 0);
+
+ efd[1] = epoll_create(1);
+ ASSERT_GE(efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd[1], EPOLL_CTL_ADD, sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[1], &e), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 1);
+
+ close(efd[0]);
+ close(efd[1]);
+ close(sfd[0]);
+ close(sfd[1]);
+}
+
+/*
+ * t0
+ * | (ew)
+ * e0
+ * | (et)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll19)
+{
+ int efd[2];
+ int sfd[2];
+ struct epoll_event e;
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sfd), 0);
+
+ efd[0] = epoll_create(1);
+ ASSERT_GE(efd[0], 0);
+
+ efd[1] = epoll_create(1);
+ ASSERT_GE(efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[1], EPOLL_CTL_ADD, sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[1], &e), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 0);
+
+ close(efd[0]);
+ close(efd[1]);
+ close(sfd[0]);
+ close(sfd[1]);
+}
+
+/*
+ * t0
+ * | (ew)
+ * e0
+ * | (et)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll20)
+{
+ int efd[2];
+ int sfd[2];
+ struct epoll_event e;
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sfd), 0);
+
+ efd[0] = epoll_create(1);
+ ASSERT_GE(efd[0], 0);
+
+ efd[1] = epoll_create(1);
+ ASSERT_GE(efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd[1], EPOLL_CTL_ADD, sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[1], &e), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 0);
+
+ close(efd[0]);
+ close(efd[1]);
+ close(sfd[0]);
+ close(sfd[1]);
+}
+
+/*
+ * t0
+ * | (p)
+ * e0
+ * | (lt)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll21)
+{
+ int efd[2];
+ int sfd[2];
+ struct pollfd pfd;
+ struct epoll_event e;
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sfd), 0);
+
+ efd[0] = epoll_create(1);
+ ASSERT_GE(efd[0], 0);
+
+ efd[1] = epoll_create(1);
+ ASSERT_GE(efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[1], EPOLL_CTL_ADD, sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[1], &e), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+
+ pfd.fd = efd[0];
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 1);
+
+ pfd.fd = efd[0];
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 1);
+
+ close(efd[0]);
+ close(efd[1]);
+ close(sfd[0]);
+ close(sfd[1]);
+}
+
+/*
+ * t0
+ * | (p)
+ * e0
+ * | (lt)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll22)
+{
+ int efd[2];
+ int sfd[2];
+ struct pollfd pfd;
+ struct epoll_event e;
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sfd), 0);
+
+ efd[0] = epoll_create(1);
+ ASSERT_GE(efd[0], 0);
+
+ efd[1] = epoll_create(1);
+ ASSERT_GE(efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd[1], EPOLL_CTL_ADD, sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[1], &e), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+
+ pfd.fd = efd[0];
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 1);
+
+ pfd.fd = efd[0];
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 1);
+
+ close(efd[0]);
+ close(efd[1]);
+ close(sfd[0]);
+ close(sfd[1]);
+}
+
+/*
+ * t0
+ * | (p)
+ * e0
+ * | (et)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll23)
+{
+ int efd[2];
+ int sfd[2];
+ struct pollfd pfd;
+ struct epoll_event e;
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sfd), 0);
+
+ efd[0] = epoll_create(1);
+ ASSERT_GE(efd[0], 0);
+
+ efd[1] = epoll_create(1);
+ ASSERT_GE(efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[1], EPOLL_CTL_ADD, sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[1], &e), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+
+ pfd.fd = efd[0];
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 1);
+
+ pfd.fd = efd[0];
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 0);
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 0);
+
+ close(efd[0]);
+ close(efd[1]);
+ close(sfd[0]);
+ close(sfd[1]);
+}
+
+/*
+ * t0
+ * | (p)
+ * e0
+ * | (et)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll24)
+{
+ int efd[2];
+ int sfd[2];
+ struct pollfd pfd;
+ struct epoll_event e;
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sfd), 0);
+
+ efd[0] = epoll_create(1);
+ ASSERT_GE(efd[0], 0);
+
+ efd[1] = epoll_create(1);
+ ASSERT_GE(efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd[1], EPOLL_CTL_ADD, sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[1], &e), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+
+ pfd.fd = efd[0];
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 1);
+
+ pfd.fd = efd[0];
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 0);
+ EXPECT_EQ(epoll_wait(efd[0], &e, 1, 0), 0);
+
+ close(efd[0]);
+ close(efd[1]);
+ close(sfd[0]);
+ close(sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (ew)
+ * e0
+ * | (lt)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll25)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1a, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (ew)
+ * e0
+ * | (lt)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll26)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1a, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (ew)
+ * e0
+ * | (et)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll27)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1a, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 1);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (ew)
+ * e0
+ * | (et)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll28)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1a, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 1);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (p)
+ * e0
+ * | (lt)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll29)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (p)
+ * e0
+ * | (lt)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll30)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (p)
+ * e0
+ * | (et)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll31)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 1);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (p)
+ * e0
+ * | (et)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll32)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 1);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) | | (ew)
+ * | e0
+ * \ / (lt)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll33)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1a, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[1], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) | | (ew)
+ * | e0
+ * \ / (lt)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll34)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1o, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[1], &e, 1, -1) > 0)
+ __sync_fetch_and_or(&ctx.count, 2);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_TRUE((ctx.count == 2) || (ctx.count == 3));
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) | | (ew)
+ * | e0
+ * \ / (et)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll35)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1a, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[1], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) | | (ew)
+ * | e0
+ * \ / (et)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll36)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1o, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[1], &e, 1, -1) > 0)
+ __sync_fetch_and_or(&ctx.count, 2);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_TRUE((ctx.count == 2) || (ctx.count == 3));
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (p) | | (ew)
+ * | e0
+ * \ / (lt)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll37)
+{
+ pthread_t emitter;
+ struct pollfd pfd;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1a, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ pfd.fd = ctx.efd[1];
+ pfd.events = POLLIN;
+ if (poll(&pfd, 1, -1) > 0) {
+ if (epoll_wait(ctx.efd[1], &e, 1, 0) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+ }
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (p) | | (ew)
+ * | e0
+ * \ / (lt)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll38)
+{
+ pthread_t emitter;
+ struct pollfd pfd;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1o, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ pfd.fd = ctx.efd[1];
+ pfd.events = POLLIN;
+ if (poll(&pfd, 1, -1) > 0) {
+ if (epoll_wait(ctx.efd[1], &e, 1, 0) > 0)
+ __sync_fetch_and_or(&ctx.count, 2);
+ }
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_TRUE((ctx.count == 2) || (ctx.count == 3));
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (p) | | (ew)
+ * | e0
+ * \ / (et)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll39)
+{
+ pthread_t emitter;
+ struct pollfd pfd;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1a, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ pfd.fd = ctx.efd[1];
+ pfd.events = POLLIN;
+ if (poll(&pfd, 1, -1) > 0) {
+ if (epoll_wait(ctx.efd[1], &e, 1, 0) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+ }
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (p) | | (ew)
+ * | e0
+ * \ / (et)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll40)
+{
+ pthread_t emitter;
+ struct pollfd pfd;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1o, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ pfd.fd = ctx.efd[1];
+ pfd.events = POLLIN;
+ if (poll(&pfd, 1, -1) > 0) {
+ if (epoll_wait(ctx.efd[1], &e, 1, 0) > 0)
+ __sync_fetch_and_or(&ctx.count, 2);
+ }
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_TRUE((ctx.count == 2) || (ctx.count == 3));
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) | | (p)
+ * | e0
+ * \ / (lt)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll41)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[1], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) | | (p)
+ * | e0
+ * \ / (lt)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll42)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1op, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[1], &e, 1, -1) > 0)
+ __sync_fetch_and_or(&ctx.count, 2);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_TRUE((ctx.count == 2) || (ctx.count == 3));
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) | | (p)
+ * | e0
+ * \ / (et)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll43)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[1], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (ew) | | (p)
+ * | e0
+ * \ / (et)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll44)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1op, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[1], &e, 1, -1) > 0)
+ __sync_fetch_and_or(&ctx.count, 2);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_TRUE((ctx.count == 2) || (ctx.count == 3));
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (p) | | (p)
+ * | e0
+ * \ / (lt)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll45)
+{
+ pthread_t emitter;
+ struct pollfd pfd;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ pfd.fd = ctx.efd[1];
+ pfd.events = POLLIN;
+ if (poll(&pfd, 1, -1) > 0) {
+ if (epoll_wait(ctx.efd[1], &e, 1, 0) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+ }
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (p) | | (p)
+ * | e0
+ * \ / (lt)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll46)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1op, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[1], &e, 1, -1) > 0)
+ __sync_fetch_and_or(&ctx.count, 2);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_TRUE((ctx.count == 2) || (ctx.count == 3));
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (p) | | (p)
+ * | e0
+ * \ / (et)
+ * e1
+ * | (lt)
+ * s0
+ */
+TEST(epoll47)
+{
+ pthread_t emitter;
+ struct pollfd pfd;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ pfd.fd = ctx.efd[1];
+ pfd.events = POLLIN;
+ if (poll(&pfd, 1, -1) > 0) {
+ if (epoll_wait(ctx.efd[1], &e, 1, 0) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+ }
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0 t1
+ * (p) | | (p)
+ * | e0
+ * \ / (et)
+ * e1
+ * | (et)
+ * s0
+ */
+TEST(epoll48)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, ctx.sfd), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1op, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry1, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[1], &e, 1, -1) > 0)
+ __sync_fetch_and_or(&ctx.count, 2);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_TRUE((ctx.count == 2) || (ctx.count == 3));
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+}
+
+/*
+ * t0
+ * | (ew)
+ * e0
+ * (lt) / \ (lt)
+ * e1 e2
+ * (lt) | | (lt)
+ * s0 s2
+ */
+TEST(epoll49)
+{
+ int efd[3];
+ int sfd[4];
+ struct epoll_event events[2];
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[2]), 0);
+
+ efd[0] = epoll_create(1);
+ ASSERT_GE(efd[0], 0);
+
+ efd[1] = epoll_create(1);
+ ASSERT_GE(efd[1], 0);
+
+ efd[2] = epoll_create(1);
+ ASSERT_GE(efd[2], 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[1], EPOLL_CTL_ADD, sfd[0], events), 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[2], EPOLL_CTL_ADD, sfd[2], events), 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[1], events), 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[2], events), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+ ASSERT_EQ(write(sfd[3], "w", 1), 1);
+
+ EXPECT_EQ(epoll_wait(efd[0], events, 2, 0), 2);
+ EXPECT_EQ(epoll_wait(efd[0], events, 2, 0), 2);
+
+ close(efd[0]);
+ close(efd[1]);
+ close(efd[2]);
+ close(sfd[0]);
+ close(sfd[1]);
+ close(sfd[2]);
+ close(sfd[3]);
+}
+
+/*
+ * t0
+ * | (ew)
+ * e0
+ * (et) / \ (et)
+ * e1 e2
+ * (lt) | | (lt)
+ * s0 s2
+ */
+TEST(epoll50)
+{
+ int efd[3];
+ int sfd[4];
+ struct epoll_event events[2];
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[2]), 0);
+
+ efd[0] = epoll_create(1);
+ ASSERT_GE(efd[0], 0);
+
+ efd[1] = epoll_create(1);
+ ASSERT_GE(efd[1], 0);
+
+ efd[2] = epoll_create(1);
+ ASSERT_GE(efd[2], 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[1], EPOLL_CTL_ADD, sfd[0], events), 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[2], EPOLL_CTL_ADD, sfd[2], events), 0);
+
+ events[0].events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[1], events), 0);
+
+ events[0].events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[2], events), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+ ASSERT_EQ(write(sfd[3], "w", 1), 1);
+
+ EXPECT_EQ(epoll_wait(efd[0], events, 2, 0), 2);
+ EXPECT_EQ(epoll_wait(efd[0], events, 2, 0), 0);
+
+ close(efd[0]);
+ close(efd[1]);
+ close(efd[2]);
+ close(sfd[0]);
+ close(sfd[1]);
+ close(sfd[2]);
+ close(sfd[3]);
+}
+
+/*
+ * t0
+ * | (p)
+ * e0
+ * (lt) / \ (lt)
+ * e1 e2
+ * (lt) | | (lt)
+ * s0 s2
+ */
+TEST(epoll51)
+{
+ int efd[3];
+ int sfd[4];
+ struct pollfd pfd;
+ struct epoll_event events[2];
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[2]), 0);
+
+ efd[0] = epoll_create(1);
+ ASSERT_GE(efd[0], 0);
+
+ efd[1] = epoll_create(1);
+ ASSERT_GE(efd[1], 0);
+
+ efd[2] = epoll_create(1);
+ ASSERT_GE(efd[2], 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[1], EPOLL_CTL_ADD, sfd[0], events), 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[2], EPOLL_CTL_ADD, sfd[2], events), 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[1], events), 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[2], events), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+ ASSERT_EQ(write(sfd[3], "w", 1), 1);
+
+ pfd.fd = efd[0];
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd[0], events, 2, 0), 2);
+
+ pfd.fd = efd[0];
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd[0], events, 2, 0), 2);
+
+ close(efd[0]);
+ close(efd[1]);
+ close(efd[2]);
+ close(sfd[0]);
+ close(sfd[1]);
+ close(sfd[2]);
+ close(sfd[3]);
+}
+
+/*
+ * t0
+ * | (p)
+ * e0
+ * (et) / \ (et)
+ * e1 e2
+ * (lt) | | (lt)
+ * s0 s2
+ */
+TEST(epoll52)
+{
+ int efd[3];
+ int sfd[4];
+ struct pollfd pfd;
+ struct epoll_event events[2];
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &sfd[2]), 0);
+
+ efd[0] = epoll_create(1);
+ ASSERT_GE(efd[0], 0);
+
+ efd[1] = epoll_create(1);
+ ASSERT_GE(efd[1], 0);
+
+ efd[2] = epoll_create(1);
+ ASSERT_GE(efd[2], 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[1], EPOLL_CTL_ADD, sfd[0], events), 0);
+
+ events[0].events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(efd[2], EPOLL_CTL_ADD, sfd[2], events), 0);
+
+ events[0].events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[1], events), 0);
+
+ events[0].events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(efd[0], EPOLL_CTL_ADD, efd[2], events), 0);
+
+ ASSERT_EQ(write(sfd[1], "w", 1), 1);
+ ASSERT_EQ(write(sfd[3], "w", 1), 1);
+
+ pfd.fd = efd[0];
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 1);
+ EXPECT_EQ(epoll_wait(efd[0], events, 2, 0), 2);
+
+ pfd.fd = efd[0];
+ pfd.events = POLLIN;
+ EXPECT_EQ(poll(&pfd, 1, 0), 0);
+ EXPECT_EQ(epoll_wait(efd[0], events, 2, 0), 0);
+
+ close(efd[0]);
+ close(efd[1]);
+ close(efd[2]);
+ close(sfd[0]);
+ close(sfd[1]);
+ close(sfd[2]);
+ close(sfd[3]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (ew)
+ * e0
+ * (lt) / \ (lt)
+ * e1 e2
+ * (lt) | | (lt)
+ * s0 s2
+ */
+TEST(epoll53)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[2]), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ ctx.efd[2] = epoll_create(1);
+ ASSERT_GE(ctx.efd[2], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[2], EPOLL_CTL_ADD, ctx.sfd[2], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[2], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1a, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry2, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.efd[2]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+ close(ctx.sfd[2]);
+ close(ctx.sfd[3]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (ew)
+ * e0
+ * (et) / \ (et)
+ * e1 e2
+ * (lt) | | (lt)
+ * s0 s2
+ */
+TEST(epoll54)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[2]), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ ctx.efd[2] = epoll_create(1);
+ ASSERT_GE(ctx.efd[2], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[2], EPOLL_CTL_ADD, ctx.sfd[2], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[2], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1a, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry2, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.efd[2]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+ close(ctx.sfd[2]);
+ close(ctx.sfd[3]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (p)
+ * e0
+ * (lt) / \ (lt)
+ * e1 e2
+ * (lt) | | (lt)
+ * s0 s2
+ */
+TEST(epoll55)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[2]), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ ctx.efd[2] = epoll_create(1);
+ ASSERT_GE(ctx.efd[2], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[2], EPOLL_CTL_ADD, ctx.sfd[2], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[2], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry2, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.efd[2]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+ close(ctx.sfd[2]);
+ close(ctx.sfd[3]);
+}
+
+/*
+ * t0 t1
+ * (ew) \ / (p)
+ * e0
+ * (et) / \ (et)
+ * e1 e2
+ * (lt) | | (lt)
+ * s0 s2
+ */
+TEST(epoll56)
+{
+ pthread_t emitter;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[2]), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ ctx.efd[2] = epoll_create(1);
+ ASSERT_GE(ctx.efd[2], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[2], EPOLL_CTL_ADD, ctx.sfd[2], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[2], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry2, &ctx), 0);
+
+ if (epoll_wait(ctx.efd[0], &e, 1, -1) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.efd[2]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+ close(ctx.sfd[2]);
+ close(ctx.sfd[3]);
+}
+
+/*
+ * t0 t1
+ * (p) \ / (p)
+ * e0
+ * (lt) / \ (lt)
+ * e1 e2
+ * (lt) | | (lt)
+ * s0 s2
+ */
+TEST(epoll57)
+{
+ pthread_t emitter;
+ struct pollfd pfd;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[2]), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ ctx.efd[2] = epoll_create(1);
+ ASSERT_GE(ctx.efd[2], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[2], EPOLL_CTL_ADD, ctx.sfd[2], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[2], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry2, &ctx), 0);
+
+ pfd.fd = ctx.efd[0];
+ pfd.events = POLLIN;
+ if (poll(&pfd, 1, -1) > 0) {
+ if (epoll_wait(ctx.efd[0], &e, 1, 0) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+ }
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.efd[2]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+ close(ctx.sfd[2]);
+ close(ctx.sfd[3]);
+}
+
+/*
+ * t0 t1
+ * (p) \ / (p)
+ * e0
+ * (et) / \ (et)
+ * e1 e2
+ * (lt) | | (lt)
+ * s0 s2
+ */
+TEST(epoll58)
+{
+ pthread_t emitter;
+ struct pollfd pfd;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+
+ signal(SIGUSR1, signal_handler);
+
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[0]), 0);
+ ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, &ctx.sfd[2]), 0);
+
+ ctx.efd[0] = epoll_create(1);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.efd[1] = epoll_create(1);
+ ASSERT_GE(ctx.efd[1], 0);
+
+ ctx.efd[2] = epoll_create(1);
+ ASSERT_GE(ctx.efd[2], 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[1], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ e.events = EPOLLIN;
+ ASSERT_EQ(epoll_ctl(ctx.efd[2], EPOLL_CTL_ADD, ctx.sfd[2], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[1], &e), 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.efd[2], &e), 0);
+
+ ctx.main = pthread_self();
+ ASSERT_EQ(pthread_create(&ctx.waiter, NULL, waiter_entry1ap, &ctx), 0);
+ ASSERT_EQ(pthread_create(&emitter, NULL, emitter_entry2, &ctx), 0);
+
+ pfd.fd = ctx.efd[0];
+ pfd.events = POLLIN;
+ if (poll(&pfd, 1, -1) > 0) {
+ if (epoll_wait(ctx.efd[0], &e, 1, 0) > 0)
+ __sync_fetch_and_add(&ctx.count, 1);
+ }
+
+ ASSERT_EQ(pthread_join(ctx.waiter, NULL), 0);
+ EXPECT_EQ(ctx.count, 2);
+
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+
+ close(ctx.efd[0]);
+ close(ctx.efd[1]);
+ close(ctx.efd[2]);
+ close(ctx.sfd[0]);
+ close(ctx.sfd[1]);
+ close(ctx.sfd[2]);
+ close(ctx.sfd[3]);
+}
+
+static void *epoll59_thread(void *ctx_)
+{
+ struct epoll_mtcontext *ctx = ctx_;
+ struct epoll_event e;
+ int i;
+
+ for (i = 0; i < 100000; i++) {
+ while (ctx->count == 0)
+ ;
+
+ e.events = EPOLLIN | EPOLLERR | EPOLLET;
+ epoll_ctl(ctx->efd[0], EPOLL_CTL_MOD, ctx->sfd[0], &e);
+ ctx->count = 0;
+ }
+
+ return NULL;
+}
+
+/*
+ * t0
+ * (p) \
+ * e0
+ * (et) /
+ * e0
+ *
+ * Based on https://bugzilla.kernel.org/show_bug.cgi?id=205933
+ */
+TEST(epoll59)
+{
+ pthread_t emitter;
+ struct pollfd pfd;
+ struct epoll_event e;
+ struct epoll_mtcontext ctx = { 0 };
+ int i, ret;
+
+ signal(SIGUSR1, signal_handler);
+
+ ctx.efd[0] = epoll_create1(0);
+ ASSERT_GE(ctx.efd[0], 0);
+
+ ctx.sfd[0] = eventfd(1, 0);
+ ASSERT_GE(ctx.sfd[0], 0);
+
+ e.events = EPOLLIN | EPOLLERR | EPOLLET;
+ ASSERT_EQ(epoll_ctl(ctx.efd[0], EPOLL_CTL_ADD, ctx.sfd[0], &e), 0);
+
+ ASSERT_EQ(pthread_create(&emitter, NULL, epoll59_thread, &ctx), 0);
+
+ for (i = 0; i < 100000; i++) {
+ ret = epoll_wait(ctx.efd[0], &e, 1, 1000);
+ ASSERT_GT(ret, 0);
+
+ while (ctx.count != 0)
+ ;
+ ctx.count = 1;
+ }
+ if (pthread_tryjoin_np(emitter, NULL) < 0) {
+ pthread_kill(emitter, SIGUSR1);
+ pthread_join(emitter, NULL);
+ }
+ close(ctx.efd[0]);
+ close(ctx.sfd[0]);
+}
+
+enum {
+ EPOLL60_EVENTS_NR = 10,
+};
+
+struct epoll60_ctx {
+ volatile int stopped;
+ int ready;
+ int waiters;
+ int epfd;
+ int evfd[EPOLL60_EVENTS_NR];
+};
+
+static void *epoll60_wait_thread(void *ctx_)
+{
+ struct epoll60_ctx *ctx = ctx_;
+ struct epoll_event e;
+ sigset_t sigmask;
+ uint64_t v;
+ int ret;
+
+ /* Block SIGUSR1 */
+ sigemptyset(&sigmask);
+ sigaddset(&sigmask, SIGUSR1);
+ sigprocmask(SIG_SETMASK, &sigmask, NULL);
+
+ /* Prepare empty mask for epoll_pwait() */
+ sigemptyset(&sigmask);
+
+ while (!ctx->stopped) {
+ /* Mark we are ready */
+ __atomic_fetch_add(&ctx->ready, 1, __ATOMIC_ACQUIRE);
+
+ /* Start when all are ready */
+ while (__atomic_load_n(&ctx->ready, __ATOMIC_ACQUIRE) &&
+ !ctx->stopped);
+
+ /* Account this waiter */
+ __atomic_fetch_add(&ctx->waiters, 1, __ATOMIC_ACQUIRE);
+
+ ret = epoll_pwait(ctx->epfd, &e, 1, 2000, &sigmask);
+ if (ret != 1) {
+ /* We expect only signal delivery on stop */
+ assert(ret < 0 && errno == EINTR && "Lost wakeup!\n");
+ assert(ctx->stopped);
+ break;
+ }
+
+ ret = read(e.data.fd, &v, sizeof(v));
+ /* Since we are on ET mode, thus each thread gets its own fd. */
+ assert(ret == sizeof(v));
+
+ __atomic_fetch_sub(&ctx->waiters, 1, __ATOMIC_RELEASE);
+ }
+
+ return NULL;
+}
+
+static inline unsigned long long msecs(void)
+{
+ struct timespec ts;
+ unsigned long long msecs;
+
+ clock_gettime(CLOCK_REALTIME, &ts);
+ msecs = ts.tv_sec * 1000ull;
+ msecs += ts.tv_nsec / 1000000ull;
+
+ return msecs;
+}
+
+static inline int count_waiters(struct epoll60_ctx *ctx)
+{
+ return __atomic_load_n(&ctx->waiters, __ATOMIC_ACQUIRE);
+}
+
+TEST(epoll60)
+{
+ struct epoll60_ctx ctx = { 0 };
+ pthread_t waiters[ARRAY_SIZE(ctx.evfd)];
+ struct epoll_event e;
+ int i, n, ret;
+
+ signal(SIGUSR1, signal_handler);
+
+ ctx.epfd = epoll_create1(0);
+ ASSERT_GE(ctx.epfd, 0);
+
+ /* Create event fds */
+ for (i = 0; i < ARRAY_SIZE(ctx.evfd); i++) {
+ ctx.evfd[i] = eventfd(0, EFD_NONBLOCK);
+ ASSERT_GE(ctx.evfd[i], 0);
+
+ e.events = EPOLLIN | EPOLLET;
+ e.data.fd = ctx.evfd[i];
+ ASSERT_EQ(epoll_ctl(ctx.epfd, EPOLL_CTL_ADD, ctx.evfd[i], &e), 0);
+ }
+
+ /* Create waiter threads */
+ for (i = 0; i < ARRAY_SIZE(waiters); i++)
+ ASSERT_EQ(pthread_create(&waiters[i], NULL,
+ epoll60_wait_thread, &ctx), 0);
+
+ for (i = 0; i < 300; i++) {
+ uint64_t v = 1, ms;
+
+ /* Wait for all to be ready */
+ while (__atomic_load_n(&ctx.ready, __ATOMIC_ACQUIRE) !=
+ ARRAY_SIZE(ctx.evfd))
+ ;
+
+ /* Steady, go */
+ __atomic_fetch_sub(&ctx.ready, ARRAY_SIZE(ctx.evfd),
+ __ATOMIC_ACQUIRE);
+
+ /* Wait all have gone to kernel */
+ while (count_waiters(&ctx) != ARRAY_SIZE(ctx.evfd))
+ ;
+
+ /* 1ms should be enough to schedule away */
+ usleep(1000);
+
+ /* Quickly signal all handles at once */
+ for (n = 0; n < ARRAY_SIZE(ctx.evfd); n++) {
+ ret = write(ctx.evfd[n], &v, sizeof(v));
+ ASSERT_EQ(ret, sizeof(v));
+ }
+
+ /* Busy loop for 1s and wait for all waiters to wake up */
+ ms = msecs();
+ while (count_waiters(&ctx) && msecs() < ms + 1000)
+ ;
+
+ ASSERT_EQ(count_waiters(&ctx), 0);
+ }
+ ctx.stopped = 1;
+ /* Stop waiters */
+ for (i = 0; i < ARRAY_SIZE(waiters); i++)
+ ret = pthread_kill(waiters[i], SIGUSR1);
+ for (i = 0; i < ARRAY_SIZE(waiters); i++)
+ pthread_join(waiters[i], NULL);
+
+ for (i = 0; i < ARRAY_SIZE(waiters); i++)
+ close(ctx.evfd[i]);
+ close(ctx.epfd);
+}
+
+struct epoll61_ctx {
+ int epfd;
+ int evfd;
+};
+
+static void *epoll61_write_eventfd(void *ctx_)
+{
+ struct epoll61_ctx *ctx = ctx_;
+ int64_t l = 1;
+
+ usleep(10950);
+ write(ctx->evfd, &l, sizeof(l));
+ return NULL;
+}
+
+static void *epoll61_epoll_with_timeout(void *ctx_)
+{
+ struct epoll61_ctx *ctx = ctx_;
+ struct epoll_event events[1];
+ int n;
+
+ n = epoll_wait(ctx->epfd, events, 1, 11);
+ /*
+ * If epoll returned the eventfd, write on the eventfd to wake up the
+ * blocking poller.
+ */
+ if (n == 1) {
+ int64_t l = 1;
+
+ write(ctx->evfd, &l, sizeof(l));
+ }
+ return NULL;
+}
+
+static void *epoll61_blocking_epoll(void *ctx_)
+{
+ struct epoll61_ctx *ctx = ctx_;
+ struct epoll_event events[1];
+
+ epoll_wait(ctx->epfd, events, 1, -1);
+ return NULL;
+}
+
+TEST(epoll61)
+{
+ struct epoll61_ctx ctx;
+ struct epoll_event ev;
+ int i, r;
+
+ ctx.epfd = epoll_create1(0);
+ ASSERT_GE(ctx.epfd, 0);
+ ctx.evfd = eventfd(0, EFD_NONBLOCK);
+ ASSERT_GE(ctx.evfd, 0);
+
+ ev.events = EPOLLIN | EPOLLET | EPOLLERR | EPOLLHUP;
+ ev.data.ptr = NULL;
+ r = epoll_ctl(ctx.epfd, EPOLL_CTL_ADD, ctx.evfd, &ev);
+ ASSERT_EQ(r, 0);
+
+ /*
+ * We are testing a race. Repeat the test case 1000 times to make it
+ * more likely to fail in case of a bug.
+ */
+ for (i = 0; i < 1000; i++) {
+ pthread_t threads[3];
+ int n;
+
+ /*
+ * Start 3 threads:
+ * Thread 1 sleeps for 10.9ms and writes to the evenfd.
+ * Thread 2 calls epoll with a timeout of 11ms.
+ * Thread 3 calls epoll with a timeout of -1.
+ *
+ * The eventfd write by Thread 1 should either wakeup Thread 2
+ * or Thread 3. If it wakes up Thread 2, Thread 2 writes on the
+ * eventfd to wake up Thread 3.
+ *
+ * If no events are missed, all three threads should eventually
+ * be joinable.
+ */
+ ASSERT_EQ(pthread_create(&threads[0], NULL,
+ epoll61_write_eventfd, &ctx), 0);
+ ASSERT_EQ(pthread_create(&threads[1], NULL,
+ epoll61_epoll_with_timeout, &ctx), 0);
+ ASSERT_EQ(pthread_create(&threads[2], NULL,
+ epoll61_blocking_epoll, &ctx), 0);
+
+ for (n = 0; n < ARRAY_SIZE(threads); ++n)
+ ASSERT_EQ(pthread_join(threads[n], NULL), 0);
+ }
+
+ close(ctx.epfd);
+ close(ctx.evfd);
+}
+
+TEST_HARNESS_MAIN
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-16 23:43:59 +0000