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160
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1 /* Copyright libuv project contributors. All rights reserved.
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2 *
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3 * Permission is hereby granted, free of charge, to any person obtaining a copy
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4 * of this software and associated documentation files (the "Software"), to
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5 * deal in the Software without restriction, including without limitation the
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6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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7 * sell copies of the Software, and to permit persons to whom the Software is
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8 * furnished to do so, subject to the following conditions:
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9 *
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10 * The above copyright notice and this permission notice shall be included in
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11 * all copies or substantial portions of the Software.
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12 *
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13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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19 * IN THE SOFTWARE.
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20 */
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21
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22 #include "task.h"
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23 #include "uv.h"
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24
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25 #include <string.h>
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26
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27 /* See test-ipc.c */
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28 void spawn_helper(uv_pipe_t* channel,
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29 uv_process_t* process,
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30 const char* helper);
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31
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32 #define NUM_WRITES 256
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33 #define BUFFERS_PER_WRITE 3
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34 #define BUFFER_SIZE 0x2000 /* 8 kb. */
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35 #define BUFFER_CONTENT 42
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36
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37 #define XFER_SIZE (NUM_WRITES * BUFFERS_PER_WRITE * BUFFER_SIZE)
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38
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39 struct write_info {
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40 uv_write_t write_req;
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41 char buffers[BUFFER_SIZE][BUFFERS_PER_WRITE];
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42 };
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43
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44 static uv_shutdown_t shutdown_req;
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45
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46 static size_t bytes_written;
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47 static size_t bytes_read;
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48
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49 static void write_cb(uv_write_t* req, int status) {
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50 struct write_info* write_info =
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51 container_of(req, struct write_info, write_req);
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52 ASSERT_OK(status);
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53 bytes_written += BUFFERS_PER_WRITE * BUFFER_SIZE;
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54 free(write_info);
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55 }
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56
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57 static void shutdown_cb(uv_shutdown_t* req, int status) {
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58 ASSERT(status == 0 || status == UV_ENOTCONN);
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59 uv_close((uv_handle_t*) req->handle, NULL);
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60 }
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61
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62 static void do_write(uv_stream_t* handle) {
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63 struct write_info* write_info;
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64 uv_buf_t bufs[BUFFERS_PER_WRITE];
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65 size_t i;
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66 int r;
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67
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68 write_info = malloc(sizeof *write_info);
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69 ASSERT_NOT_NULL(write_info);
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70
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71 for (i = 0; i < BUFFERS_PER_WRITE; i++) {
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72 memset(&write_info->buffers[i], BUFFER_CONTENT, BUFFER_SIZE);
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73 bufs[i] = uv_buf_init(write_info->buffers[i], BUFFER_SIZE);
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74 }
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75
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76 r = uv_write(
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77 &write_info->write_req, handle, bufs, BUFFERS_PER_WRITE, write_cb);
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78 ASSERT_OK(r);
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79 }
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80
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81 static void alloc_cb(uv_handle_t* handle,
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82 size_t suggested_size,
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83 uv_buf_t* buf) {
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84 buf->base = malloc(suggested_size);
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85 buf->len = (int) suggested_size;
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86 }
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87
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88 #ifndef _WIN32
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89 #include <sys/types.h>
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90 #include <unistd.h>
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91 #endif
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92
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93 static void read_cb(uv_stream_t* handle, ssize_t nread, const uv_buf_t* buf) {
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94 ssize_t i;
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95 int r;
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96
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97 ASSERT_GE(nread, 0);
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98 bytes_read += nread;
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99
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100 for (i = 0; i < nread; i++)
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101 ASSERT_EQ(buf->base[i], BUFFER_CONTENT);
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102 free(buf->base);
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103
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104 if (bytes_read >= XFER_SIZE) {
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105 r = uv_read_stop(handle);
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106 ASSERT_OK(r);
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107 r = uv_shutdown(&shutdown_req, handle, shutdown_cb);
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108 ASSERT_OK(r);
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109 }
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110 }
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111
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112 static void do_writes_and_reads(uv_stream_t* handle) {
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113 size_t i;
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114 int r;
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115
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116 bytes_written = 0;
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117 bytes_read = 0;
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118
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119 for (i = 0; i < NUM_WRITES; i++) {
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120 do_write(handle);
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121 }
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122
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123 r = uv_read_start(handle, alloc_cb, read_cb);
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124 ASSERT_OK(r);
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125
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126 r = uv_run(handle->loop, UV_RUN_DEFAULT);
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127 ASSERT_OK(r);
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128
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129 ASSERT_EQ(bytes_written, XFER_SIZE);
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130 ASSERT_EQ(bytes_read, XFER_SIZE);
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131 }
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132
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133 TEST_IMPL(ipc_heavy_traffic_deadlock_bug) {
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134 uv_pipe_t pipe;
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135 uv_process_t process;
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136
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137 spawn_helper(&pipe, &process, "ipc_helper_heavy_traffic_deadlock_bug");
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138 do_writes_and_reads((uv_stream_t*) &pipe);
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139
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140 MAKE_VALGRIND_HAPPY(pipe.loop);
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141 return 0;
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142 }
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143
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144 int ipc_helper_heavy_traffic_deadlock_bug(void) {
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145 uv_pipe_t pipe;
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146 int r;
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147
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148 r = uv_pipe_init(uv_default_loop(), &pipe, 1);
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149 ASSERT_OK(r);
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150 r = uv_pipe_open(&pipe, 0);
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151 ASSERT_OK(r);
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152
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153 notify_parent_process();
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154 do_writes_and_reads((uv_stream_t*) &pipe);
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155 uv_sleep(100);
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156
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157 MAKE_VALGRIND_HAPPY(uv_default_loop());
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158 return 0;
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159 }
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