| 1 | /* |
| 2 | * Copyright (C) 2020 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: LGPL-2.1-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <unistd.h> |
| 9 | |
| 10 | #include <common/compat/fcntl.hpp> |
| 11 | #include <common/payload.hpp> |
| 12 | #include <common/payload-view.hpp> |
| 13 | #include <tap/tap.h> |
| 14 | |
| 15 | static const int TEST_COUNT = 5; |
| 16 | |
| 17 | /* For error.h */ |
| 18 | int lttng_opt_quiet = 1; |
| 19 | int lttng_opt_verbose; |
| 20 | int lttng_opt_mi; |
| 21 | |
| 22 | static void test_fd_push_pop_order(void) |
| 23 | { |
| 24 | int ret, i; |
| 25 | struct lttng_payload payload; |
| 26 | int fds[3]; |
| 27 | |
| 28 | lttng_payload_init(&payload); |
| 29 | |
| 30 | diag("Validating fd push/pop order"); |
| 31 | for (i = 0; i < 3; i++) { |
| 32 | int fd = fcntl(STDOUT_FILENO, F_DUPFD, 0); |
| 33 | struct fd_handle *handle; |
| 34 | |
| 35 | LTTNG_ASSERT(fd >= 0); |
| 36 | fds[i] = fd; |
| 37 | |
| 38 | handle = fd_handle_create(fd); |
| 39 | LTTNG_ASSERT(handle); |
| 40 | |
| 41 | ret = lttng_payload_push_fd_handle(&payload, handle); |
| 42 | fd_handle_put(handle); |
| 43 | if (ret) { |
| 44 | break; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | ok(ret == 0, "Added three file descriptors to an lttng_payload"); |
| 49 | |
| 50 | { |
| 51 | bool fail_pop = false; |
| 52 | struct lttng_payload_view view = |
| 53 | lttng_payload_view_from_payload( |
| 54 | &payload, 0, -1); |
| 55 | |
| 56 | for (i = 0; i < 3; i++) { |
| 57 | struct fd_handle *handle = |
| 58 | lttng_payload_view_pop_fd_handle(&view); |
| 59 | |
| 60 | fail_pop |= fd_handle_get_fd(handle) != fds[i]; |
| 61 | fd_handle_put(handle); |
| 62 | } |
| 63 | |
| 64 | ok(!fail_pop, "File descriptors are popped from a payload view in the order of insertion"); |
| 65 | } |
| 66 | |
| 67 | lttng_payload_reset(&payload); |
| 68 | } |
| 69 | |
| 70 | static void test_fd_push_pop_imbalance(void) |
| 71 | { |
| 72 | int ret, i; |
| 73 | struct lttng_payload payload; |
| 74 | const char * const test_description = "Error reported when popping more file descriptors than were pushed"; |
| 75 | |
| 76 | lttng_payload_init(&payload); |
| 77 | |
| 78 | diag("Validating fd pop imbalance"); |
| 79 | for (i = 0; i < 10; i++) { |
| 80 | struct fd_handle *handle; |
| 81 | int fd = fcntl(STDOUT_FILENO, F_DUPFD, 0); |
| 82 | |
| 83 | LTTNG_ASSERT(fd >= 0); |
| 84 | |
| 85 | handle = fd_handle_create(fd); |
| 86 | LTTNG_ASSERT(handle); |
| 87 | |
| 88 | ret = lttng_payload_push_fd_handle(&payload, handle); |
| 89 | fd_handle_put(handle); |
| 90 | if (ret) { |
| 91 | break; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | { |
| 96 | struct fd_handle *handle; |
| 97 | struct lttng_payload_view view = |
| 98 | lttng_payload_view_from_payload( |
| 99 | &payload, 0, -1); |
| 100 | |
| 101 | for (i = 0; i < 10; i++) { |
| 102 | handle = lttng_payload_view_pop_fd_handle(&view); |
| 103 | fd_handle_put(handle); |
| 104 | if (!handle) { |
| 105 | goto fail; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | handle = lttng_payload_view_pop_fd_handle(&view); |
| 110 | ok(!handle, "%s", test_description); |
| 111 | fd_handle_put(handle); |
| 112 | } |
| 113 | |
| 114 | lttng_payload_reset(&payload); |
| 115 | return; |
| 116 | fail: |
| 117 | fail("%s", test_description); |
| 118 | lttng_payload_reset(&payload); |
| 119 | } |
| 120 | |
| 121 | static void test_fd_pop_fd_root_views(void) |
| 122 | { |
| 123 | int ret, i; |
| 124 | int fd = fcntl(STDOUT_FILENO, F_DUPFD, 0); |
| 125 | struct fd_handle *handle; |
| 126 | struct lttng_payload payload; |
| 127 | const char * const test_description = "Same file descriptor returned when popping from different top-level views"; |
| 128 | |
| 129 | LTTNG_ASSERT(fd >= 0); |
| 130 | handle = fd_handle_create(fd); |
| 131 | LTTNG_ASSERT(handle); |
| 132 | |
| 133 | lttng_payload_init(&payload); |
| 134 | |
| 135 | diag("Validating root view fd pop behaviour"); |
| 136 | ret = lttng_payload_push_fd_handle(&payload, handle); |
| 137 | if (ret) { |
| 138 | goto fail; |
| 139 | } |
| 140 | |
| 141 | for (i = 0; i < 5; i++) { |
| 142 | int view_fd; |
| 143 | struct fd_handle *view_handle; |
| 144 | struct lttng_payload_view view = |
| 145 | lttng_payload_view_from_payload( |
| 146 | &payload, 0, -1); |
| 147 | |
| 148 | view_handle = lttng_payload_view_pop_fd_handle(&view); |
| 149 | if (!view_handle) { |
| 150 | goto fail; |
| 151 | } |
| 152 | |
| 153 | view_fd = fd_handle_get_fd(view_handle); |
| 154 | fd_handle_put(view_handle); |
| 155 | if (view_fd != fd || view_handle != handle) { |
| 156 | goto fail; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | lttng_payload_reset(&payload); |
| 161 | pass("%s", test_description); |
| 162 | fd_handle_put(handle); |
| 163 | return; |
| 164 | fail: |
| 165 | lttng_payload_reset(&payload); |
| 166 | fail("%s", test_description); |
| 167 | fd_handle_put(handle); |
| 168 | } |
| 169 | |
| 170 | static void test_fd_pop_fd_descendant_views(void) |
| 171 | { |
| 172 | int ret; |
| 173 | const int fd1 = 42, fd2 = 1837; |
| 174 | struct fd_handle *handle1 = fd_handle_create(fd1); |
| 175 | struct fd_handle *handle2 = fd_handle_create(fd2); |
| 176 | struct fd_handle *view_handle1 = NULL, *view_handle2 = NULL; |
| 177 | struct lttng_payload payload; |
| 178 | const char * const test_description = "Different file descriptors returned when popping from descendant views"; |
| 179 | |
| 180 | lttng_payload_init(&payload); |
| 181 | LTTNG_ASSERT(handle1); |
| 182 | LTTNG_ASSERT(handle2); |
| 183 | |
| 184 | diag("Validating descendant view fd pop behaviour"); |
| 185 | ret = lttng_payload_push_fd_handle(&payload, handle1); |
| 186 | if (ret) { |
| 187 | goto fail; |
| 188 | } |
| 189 | |
| 190 | ret = lttng_payload_push_fd_handle(&payload, handle2); |
| 191 | if (ret) { |
| 192 | goto fail; |
| 193 | } |
| 194 | |
| 195 | { |
| 196 | struct lttng_payload_view view1 = |
| 197 | lttng_payload_view_from_payload( |
| 198 | &payload, 0, -1); |
| 199 | struct lttng_payload_view view2 = |
| 200 | lttng_payload_view_from_view( |
| 201 | &view1, 0, -1); |
| 202 | |
| 203 | view_handle1 = lttng_payload_view_pop_fd_handle(&view1); |
| 204 | if (!view_handle1 || fd_handle_get_fd(view_handle1) != fd1) { |
| 205 | goto fail; |
| 206 | } |
| 207 | |
| 208 | view_handle2 = lttng_payload_view_pop_fd_handle(&view2); |
| 209 | if (!view_handle2 || fd_handle_get_fd(view_handle2) != fd2) { |
| 210 | goto fail; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | lttng_payload_reset(&payload); |
| 215 | pass("%s", test_description); |
| 216 | fd_handle_put(handle1); |
| 217 | fd_handle_put(handle2); |
| 218 | fd_handle_put(view_handle1); |
| 219 | fd_handle_put(view_handle2); |
| 220 | return; |
| 221 | fail: |
| 222 | lttng_payload_reset(&payload); |
| 223 | fail("%s", test_description); |
| 224 | fd_handle_put(handle1); |
| 225 | fd_handle_put(handle2); |
| 226 | fd_handle_put(view_handle1); |
| 227 | fd_handle_put(view_handle2); |
| 228 | } |
| 229 | |
| 230 | int main(void) |
| 231 | { |
| 232 | plan_tests(TEST_COUNT); |
| 233 | |
| 234 | test_fd_push_pop_order(); |
| 235 | test_fd_push_pop_imbalance(); |
| 236 | test_fd_pop_fd_root_views(); |
| 237 | test_fd_pop_fd_descendant_views(); |
| 238 | |
| 239 | return exit_status(); |
| 240 | } |