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https://github.com/ilyakooo0/urbit.git
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f8a73b2625
git-subtree-dir: outside/libuv git-subtree-mainline: 8284e3540e0cd1f056386d61084a7e643b762afc git-subtree-split: d778dc588507588b12b9f9d2905078db542ed751
109 lines
3.5 KiB
C
109 lines
3.5 KiB
C
/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#if !defined(_WIN32)
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#include "uv.h"
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#include "task.h"
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#include <errno.h>
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#include <stdio.h>
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#include <sys/resource.h>
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#include <unistd.h>
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static void connection_cb(uv_stream_t* server_handle, int status);
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static void connect_cb(uv_connect_t* req, int status);
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static const int maxfd = 31;
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static unsigned connect_cb_called;
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static uv_tcp_t server_handle;
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static uv_tcp_t client_handle;
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TEST_IMPL(emfile) {
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struct sockaddr_in addr;
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struct rlimit limits;
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uv_connect_t connect_req;
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uv_loop_t* loop;
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int first_fd;
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loop = uv_default_loop();
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addr = uv_ip4_addr("127.0.0.1", TEST_PORT);
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ASSERT(0 == uv_tcp_init(loop, &server_handle));
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ASSERT(0 == uv_tcp_init(loop, &client_handle));
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ASSERT(0 == uv_tcp_bind(&server_handle, addr));
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ASSERT(0 == uv_listen((uv_stream_t*) &server_handle, 8, connection_cb));
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/* Lower the file descriptor limit and use up all fds save one. */
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limits.rlim_cur = limits.rlim_max = maxfd + 1;
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if (setrlimit(RLIMIT_NOFILE, &limits)) {
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perror("setrlimit(RLIMIT_NOFILE)");
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ASSERT(0);
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}
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/* Remember the first one so we can clean up afterwards. */
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do
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first_fd = dup(0);
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while (first_fd == -1 && errno == EINTR);
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ASSERT(first_fd > 0);
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while (dup(0) != -1 || errno == EINTR);
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ASSERT(errno == EMFILE);
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close(maxfd);
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/* Now connect and use up the last available file descriptor. The EMFILE
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* handling logic in src/unix/stream.c should ensure that connect_cb() runs
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* whereas connection_cb() should *not* run.
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*/
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ASSERT(0 == uv_tcp_connect(&connect_req, &client_handle, addr, connect_cb));
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ASSERT(0 == uv_run(loop, UV_RUN_DEFAULT));
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ASSERT(1 == connect_cb_called);
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/* Close the dups again. Ignore errors in the unlikely event that the
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* file descriptors were not contiguous.
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*/
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while (first_fd < maxfd) {
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close(first_fd);
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first_fd += 1;
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}
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MAKE_VALGRIND_HAPPY();
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return 0;
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}
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static void connection_cb(uv_stream_t* server_handle, int status) {
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ASSERT(0 && "connection_cb should not be called.");
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}
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static void connect_cb(uv_connect_t* req, int status) {
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/* |status| should equal 0 because the connection should have been accepted,
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* it's just that the server immediately closes it again.
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*/
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ASSERT(0 == status);
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connect_cb_called += 1;
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uv_close((uv_handle_t*) &server_handle, NULL);
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uv_close((uv_handle_t*) &client_handle, NULL);
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}
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#endif /* !defined(_WIN32) */
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