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 */
28void 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
39struct write_info {
40  uv_write_t write_req;
41  char buffers[BUFFER_SIZE][BUFFERS_PER_WRITE];
42};
43
44static uv_shutdown_t shutdown_req;
45
46static size_t bytes_written;
47static size_t bytes_read;
48
49static 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(status == 0);
53  bytes_written += BUFFERS_PER_WRITE * BUFFER_SIZE;
54  free(write_info);
55}
56
57static 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
62static 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(r == 0);
79}
80
81static 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
93static 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(nread >= 0);
98  bytes_read += nread;
99
100  for (i = 0; i < nread; i++)
101    ASSERT(buf->base[i] == BUFFER_CONTENT);
102  free(buf->base);
103
104  if (bytes_read >= XFER_SIZE) {
105    r = uv_read_stop(handle);
106    ASSERT(r == 0);
107    r = uv_shutdown(&shutdown_req, handle, shutdown_cb);
108    ASSERT(r == 0);
109  }
110}
111
112static 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(r == 0);
125
126  r = uv_run(handle->loop, UV_RUN_DEFAULT);
127  ASSERT(r == 0);
128
129  ASSERT(bytes_written == XFER_SIZE);
130  ASSERT(bytes_read == XFER_SIZE);
131}
132
133TEST_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();
141  return 0;
142}
143
144int 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(r == 0);
150  r = uv_pipe_open(&pipe, 0);
151  ASSERT(r == 0);
152
153  notify_parent_process();
154  do_writes_and_reads((uv_stream_t*) &pipe);
155  uv_sleep(100);
156
157  MAKE_VALGRIND_HAPPY();
158  return 0;
159}
160