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 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(status == 0); 53 bytes_written += BUFFERS_PER_WRITE * BUFFER_SIZE; 54 free(write_info); 55 } 56 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 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(r == 0); 79 } 80 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 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(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 } 111 112 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(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 } 132 133 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(); 141 return 0; 142 } 143 144 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(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