1 | /* Copyright Joyent, Inc. and other Node contributors. All rights reserved. |
2 | * |
3 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
4 | * of this software and associated documentation files (the "Software"), to |
5 | * deal in the Software without restriction, including without limitation the |
6 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
7 | * sell copies of the Software, and to permit persons to whom the Software is |
8 | * furnished to do so, subject to the following conditions: |
9 | * |
10 | * The above copyright notice and this permission notice shall be included in |
11 | * all copies or substantial portions of the Software. |
12 | * |
13 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
14 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
15 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
16 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
17 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
18 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
19 | * IN THE SOFTWARE. |
20 | */ |
21 | |
22 | #if !defined(_WIN32) |
23 | |
24 | #include "uv.h" |
25 | #include "task.h" |
26 | |
27 | #include <errno.h> |
28 | #include <sys/resource.h> |
29 | #include <unistd.h> |
30 | |
31 | static void connection_cb(uv_stream_t* server_handle, int status); |
32 | static void connect_cb(uv_connect_t* req, int status); |
33 | |
34 | static const int maxfd = 31; |
35 | static unsigned connect_cb_called; |
36 | static uv_tcp_t server_handle; |
37 | static uv_tcp_t client_handle; |
38 | |
39 | |
40 | TEST_IMPL(emfile) { |
41 | struct sockaddr_in addr; |
42 | struct rlimit limits; |
43 | uv_connect_t connect_req; |
44 | uv_loop_t* loop; |
45 | int first_fd; |
46 | #if defined(_AIX) || defined(__MVS__) |
47 | /* On AIX, if a 'accept' call fails ECONNRESET is set on the socket |
48 | * which causes uv__emfile_trick to not work as intended and this test |
49 | * to fail. |
50 | */ |
51 | RETURN_SKIP("uv__emfile_trick does not work on this OS" ); |
52 | #endif |
53 | |
54 | /* Lower the file descriptor limit and use up all fds save one. */ |
55 | limits.rlim_cur = limits.rlim_max = maxfd + 1; |
56 | if (setrlimit(RLIMIT_NOFILE, &limits)) { |
57 | ASSERT(errno == EPERM); /* Valgrind blocks the setrlimit() call. */ |
58 | RETURN_SKIP("setrlimit(RLIMIT_NOFILE) failed, running under valgrind?" ); |
59 | } |
60 | |
61 | loop = uv_default_loop(); |
62 | ASSERT(0 == uv_ip4_addr("127.0.0.1" , TEST_PORT, &addr)); |
63 | ASSERT(0 == uv_tcp_init(loop, &server_handle)); |
64 | ASSERT(0 == uv_tcp_init(loop, &client_handle)); |
65 | ASSERT(0 == uv_tcp_bind(&server_handle, (const struct sockaddr*) &addr, 0)); |
66 | ASSERT(0 == uv_listen((uv_stream_t*) &server_handle, 8, connection_cb)); |
67 | |
68 | /* Remember the first one so we can clean up afterwards. */ |
69 | do |
70 | first_fd = dup(0); |
71 | while (first_fd == -1 && errno == EINTR); |
72 | ASSERT(first_fd > 0); |
73 | |
74 | while (dup(0) != -1 || errno == EINTR); |
75 | ASSERT(errno == EMFILE); |
76 | close(maxfd); |
77 | |
78 | /* Now connect and use up the last available file descriptor. The EMFILE |
79 | * handling logic in src/unix/stream.c should ensure that connect_cb() runs |
80 | * whereas connection_cb() should *not* run. |
81 | */ |
82 | ASSERT(0 == uv_tcp_connect(&connect_req, |
83 | &client_handle, |
84 | (const struct sockaddr*) &addr, |
85 | connect_cb)); |
86 | ASSERT(0 == uv_run(loop, UV_RUN_DEFAULT)); |
87 | ASSERT(1 == connect_cb_called); |
88 | |
89 | /* Close the dups again. Ignore errors in the unlikely event that the |
90 | * file descriptors were not contiguous. |
91 | */ |
92 | while (first_fd < maxfd) { |
93 | close(first_fd); |
94 | first_fd += 1; |
95 | } |
96 | |
97 | MAKE_VALGRIND_HAPPY(); |
98 | return 0; |
99 | } |
100 | |
101 | |
102 | static void connection_cb(uv_stream_t* server_handle, int status) { |
103 | ASSERT(0 && "connection_cb should not be called." ); |
104 | } |
105 | |
106 | |
107 | static void connect_cb(uv_connect_t* req, int status) { |
108 | /* |status| should equal 0 because the connection should have been accepted, |
109 | * it's just that the server immediately closes it again. |
110 | */ |
111 | ASSERT(0 == status); |
112 | connect_cb_called += 1; |
113 | uv_close((uv_handle_t*) &server_handle, NULL); |
114 | uv_close((uv_handle_t*) &client_handle, NULL); |
115 | } |
116 | |
117 | #else |
118 | |
119 | typedef int file_has_no_tests; /* ISO C forbids an empty translation unit. */ |
120 | |
121 | #endif /* !_WIN32 */ |
122 | |