libuv-svace-build

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/* 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 <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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#if defined(_AIX) || defined(__MVS__)
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  /* On AIX, if a 'accept' call fails ECONNRESET is set on the socket
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   * which causes uv__emfile_trick to not work as intended and this test
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   * to fail.
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   */
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  RETURN_SKIP("uv__emfile_trick does not work on this OS");
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#endif
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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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    ASSERT_EQ(errno, EPERM);  /* Valgrind blocks the setrlimit() call. */
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    RETURN_SKIP("setrlimit(RLIMIT_NOFILE) failed, running under valgrind?");
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  }
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  loop = uv_default_loop();
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  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
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  ASSERT_OK(uv_tcp_init(loop, &server_handle));
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  ASSERT_OK(uv_tcp_init(loop, &client_handle));
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  ASSERT_OK(uv_tcp_bind(&server_handle, (const struct sockaddr*) &addr, 0));
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  ASSERT_OK(uv_listen((uv_stream_t*) &server_handle, 8, connection_cb));
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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_GT(first_fd, 0);
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  while (dup(0) != -1 || errno == EINTR);
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  ASSERT_EQ(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_OK(uv_tcp_connect(&connect_req,
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                           &client_handle,
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                           (const struct sockaddr*) &addr,
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                           connect_cb));
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  ASSERT_OK(uv_run(loop, UV_RUN_DEFAULT));
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  ASSERT_EQ(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(loop);
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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_OK(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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#else
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typedef int file_has_no_tests; /* ISO C forbids an empty translation unit. */
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#endif /* !_WIN32 */
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