9ded07cff6
Description: In the kernel the epoll_event structure is packed in 64 bit kernel builds to allow the structure to be more easily compatible with 32 bit user space. As a result, when user space is 64-bit the structure must be packed as well. Add unit test to show the ptr alignment issue. Change-Id: I2c4848d5e38a357219091f350f9b6e3da05090da Signed-off-by: Philip Hatcher <philip.hatcher@intel.com> Signed-off-by: Fengwei Yin <fengwei.yin@intel.com> Reviewed-by: Hazarika, Prodyut <prodyut.hazarika@intel.com> Tested-by: Hazarika, Prodyut <prodyut.hazarika@intel.com>
68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <gtest/gtest.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <sys/epoll.h>
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#include <unistd.h>
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TEST(sys_epoll, smoke) {
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int epoll_fd = epoll_create(1);
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ASSERT_NE(-1, epoll_fd) << strerror(errno);
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epoll_event events[1];
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// Regular epoll_wait.
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ASSERT_EQ(0, epoll_wait(epoll_fd, events, 1, 1));
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// epoll_pwait without a sigset (which is equivalent to epoll_wait).
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ASSERT_EQ(0, epoll_pwait(epoll_fd, events, 1, 1, NULL));
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// epoll_pwait with a sigset.
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sigset_t ss;
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sigemptyset(&ss);
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sigaddset(&ss, SIGPIPE);
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ASSERT_EQ(0, epoll_pwait(epoll_fd, events, 1, 1, &ss));
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}
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TEST(sys_epoll, epoll_event_data) {
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int epoll_fd = epoll_create(1);
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ASSERT_NE(-1, epoll_fd) << strerror(errno);
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int fds[2];
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ASSERT_NE(-1, pipe(fds));
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const uint64_t expected = 0x123456789abcdef0;
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// Get ready to poll on read end of pipe.
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epoll_event ev;
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ev.events = EPOLLIN;
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ev.data.u64 = expected;
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ASSERT_NE(-1, epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fds[0], &ev));
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// Ensure there's something in the pipe.
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ASSERT_EQ(1, write(fds[1], "\n", 1));
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// Poll.
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epoll_event events[1];
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ASSERT_EQ(1, epoll_wait(epoll_fd, events, 1, 1));
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ASSERT_EQ(expected, events[0].data.u64);
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close(fds[0]);
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close(fds[1]);
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}
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