1 /* Copyright libuv project 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 #include "task.h"
23 #include "uv.h"
24
25 #include <string.h>
26
27 /* See test-ipc.c */
28 void spawn_helper(uv_pipe_t* channel,
29 uv_process_t* process,
30 const char* helper);
31
32 #define NUM_WRITES 256
33 #define BUFFERS_PER_WRITE 3
34 #define BUFFER_SIZE 0x2000 /* 8 kb. */
35 #define BUFFER_CONTENT 42
36
37 #define XFER_SIZE (NUM_WRITES * BUFFERS_PER_WRITE * BUFFER_SIZE)
38
39 struct write_info {
40 uv_write_t write_req;
41 char buffers[BUFFER_SIZE][BUFFERS_PER_WRITE];
42 };
43
44 static uv_shutdown_t shutdown_req;
45
46 static size_t bytes_written;
47 static size_t bytes_read;
48
write_cb(uv_write_t * req,int status)49 static void write_cb(uv_write_t* req, int status) {
50 struct write_info* write_info =
51 container_of(req, struct write_info, write_req);
52 ASSERT_OK(status);
53 bytes_written += BUFFERS_PER_WRITE * BUFFER_SIZE;
54 free(write_info);
55 }
56
shutdown_cb(uv_shutdown_t * req,int status)57 static void shutdown_cb(uv_shutdown_t* req, int status) {
58 ASSERT(status == 0 || status == UV_ENOTCONN);
59 uv_close((uv_handle_t*) req->handle, NULL);
60 }
61
do_write(uv_stream_t * handle)62 static void do_write(uv_stream_t* handle) {
63 struct write_info* write_info;
64 uv_buf_t bufs[BUFFERS_PER_WRITE];
65 size_t i;
66 int r;
67
68 write_info = malloc(sizeof *write_info);
69 ASSERT_NOT_NULL(write_info);
70
71 for (i = 0; i < BUFFERS_PER_WRITE; i++) {
72 memset(&write_info->buffers[i], BUFFER_CONTENT, BUFFER_SIZE);
73 bufs[i] = uv_buf_init(write_info->buffers[i], BUFFER_SIZE);
74 }
75
76 r = uv_write(
77 &write_info->write_req, handle, bufs, BUFFERS_PER_WRITE, write_cb);
78 ASSERT_OK(r);
79 }
80
alloc_cb(uv_handle_t * handle,size_t suggested_size,uv_buf_t * buf)81 static void alloc_cb(uv_handle_t* handle,
82 size_t suggested_size,
83 uv_buf_t* buf) {
84 buf->base = malloc(suggested_size);
85 buf->len = (int) suggested_size;
86 }
87
88 #ifndef _WIN32
89 #include <sys/types.h>
90 #include <unistd.h>
91 #endif
92
read_cb(uv_stream_t * handle,ssize_t nread,const uv_buf_t * buf)93 static void read_cb(uv_stream_t* handle, ssize_t nread, const uv_buf_t* buf) {
94 ssize_t i;
95 int r;
96
97 ASSERT_GE(nread, 0);
98 bytes_read += nread;
99
100 for (i = 0; i < nread; i++)
101 ASSERT_EQ(buf->base[i], BUFFER_CONTENT);
102 free(buf->base);
103
104 if (bytes_read >= XFER_SIZE) {
105 r = uv_read_stop(handle);
106 ASSERT_OK(r);
107 r = uv_shutdown(&shutdown_req, handle, shutdown_cb);
108 ASSERT_OK(r);
109 }
110 }
111
do_writes_and_reads(uv_stream_t * handle)112 static void do_writes_and_reads(uv_stream_t* handle) {
113 size_t i;
114 int r;
115
116 bytes_written = 0;
117 bytes_read = 0;
118
119 for (i = 0; i < NUM_WRITES; i++) {
120 do_write(handle);
121 }
122
123 r = uv_read_start(handle, alloc_cb, read_cb);
124 ASSERT_OK(r);
125
126 r = uv_run(handle->loop, UV_RUN_DEFAULT);
127 ASSERT_OK(r);
128
129 ASSERT_EQ(bytes_written, XFER_SIZE);
130 ASSERT_EQ(bytes_read, XFER_SIZE);
131 }
132
TEST_IMPL(ipc_heavy_traffic_deadlock_bug)133 TEST_IMPL(ipc_heavy_traffic_deadlock_bug) {
134 uv_pipe_t pipe;
135 uv_process_t process;
136
137 spawn_helper(&pipe, &process, "ipc_helper_heavy_traffic_deadlock_bug");
138 do_writes_and_reads((uv_stream_t*) &pipe);
139
140 MAKE_VALGRIND_HAPPY(pipe.loop);
141 return 0;
142 }
143
ipc_helper_heavy_traffic_deadlock_bug(void)144 int ipc_helper_heavy_traffic_deadlock_bug(void) {
145 uv_pipe_t pipe;
146 int r;
147
148 r = uv_pipe_init(uv_default_loop(), &pipe, 1);
149 ASSERT_OK(r);
150 r = uv_pipe_open(&pipe, 0);
151 ASSERT_OK(r);
152
153 notify_parent_process();
154 do_writes_and_reads((uv_stream_t*) &pipe);
155 uv_sleep(100);
156
157 MAKE_VALGRIND_HAPPY(uv_default_loop());
158 return 0;
159 }
160
