| 1 | /* |
| 2 | * test_ctf_ir_ref.c |
| 3 | * |
| 4 | * CTF IR Reference Count test |
| 5 | * |
| 6 | * Copyright 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; under version 2 of the License. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | */ |
| 21 | |
| 22 | #include "tap/tap.h" |
| 23 | #include <babeltrace/ctf-ir/trace.h> |
| 24 | #include <babeltrace/ctf-ir/stream-class.h> |
| 25 | #include <babeltrace/ctf-ir/stream.h> |
| 26 | #include <babeltrace/ctf-ir/event.h> |
| 27 | #include <babeltrace/object-internal.h> |
| 28 | #include <assert.h> |
| 29 | |
| 30 | struct user { |
| 31 | struct bt_ctf_trace *tc; |
| 32 | struct bt_ctf_stream_class *sc; |
| 33 | struct bt_ctf_event_class *ec; |
| 34 | }; |
| 35 | |
| 36 | /** |
| 37 | * Returns a structure containing the following fields: |
| 38 | * - uint8_t payload_8; |
| 39 | * - uint16_t payload_16; |
| 40 | * - uint32_t payload_32; |
| 41 | */ |
| 42 | static struct bt_ctf_field_type *create_integer_struct(void) |
| 43 | { |
| 44 | int ret; |
| 45 | struct bt_ctf_field_type *structure = NULL; |
| 46 | struct bt_ctf_field_type *ui8 = NULL, *ui16 = NULL, *ui32 = NULL; |
| 47 | |
| 48 | structure = bt_ctf_field_type_structure_create(); |
| 49 | if (!structure) { |
| 50 | goto error; |
| 51 | } |
| 52 | |
| 53 | ui8 = bt_ctf_field_type_integer_create(8); |
| 54 | if (!ui8) { |
| 55 | diag("Failed to create uint8_t type"); |
| 56 | goto error; |
| 57 | } |
| 58 | ret = bt_ctf_field_type_structure_add_field(structure, ui8, |
| 59 | "payload_8"); |
| 60 | if (ret) { |
| 61 | diag("Failed to add uint8_t to structure"); |
| 62 | goto error; |
| 63 | } |
| 64 | ui16 = bt_ctf_field_type_integer_create(16); |
| 65 | if (!ui16) { |
| 66 | diag("Failed to create uint16_t type"); |
| 67 | goto error; |
| 68 | } |
| 69 | ret = bt_ctf_field_type_structure_add_field(structure, ui16, |
| 70 | "payload_16"); |
| 71 | if (ret) { |
| 72 | diag("Failed to add uint16_t to structure"); |
| 73 | goto error; |
| 74 | } |
| 75 | ui32 = bt_ctf_field_type_integer_create(32); |
| 76 | if (!ui32) { |
| 77 | diag("Failed to create uint32_t type"); |
| 78 | goto error; |
| 79 | } |
| 80 | ret = bt_ctf_field_type_structure_add_field(structure, ui32, |
| 81 | "payload_32"); |
| 82 | if (ret) { |
| 83 | diag("Failed to add uint32_t to structure"); |
| 84 | goto error; |
| 85 | } |
| 86 | end: |
| 87 | BT_PUT(ui8); |
| 88 | BT_PUT(ui16); |
| 89 | BT_PUT(ui32); |
| 90 | return structure; |
| 91 | error: |
| 92 | BT_PUT(structure); |
| 93 | goto end; |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * A simple event has the following payload: |
| 98 | * - uint8_t payload_8; |
| 99 | * - uint16_t payload_16; |
| 100 | * - uint32_t payload_32; |
| 101 | */ |
| 102 | static struct bt_ctf_event_class *create_simple_event(const char *name) |
| 103 | { |
| 104 | int ret; |
| 105 | struct bt_ctf_event_class *event = NULL; |
| 106 | struct bt_ctf_field_type *payload = NULL; |
| 107 | |
| 108 | assert(name); |
| 109 | event = bt_ctf_event_class_create(name); |
| 110 | if (!event) { |
| 111 | diag("Failed to create simple event"); |
| 112 | goto error; |
| 113 | } |
| 114 | |
| 115 | payload = create_integer_struct(); |
| 116 | if (!payload) { |
| 117 | diag("Failed to initialize integer structure"); |
| 118 | goto error; |
| 119 | } |
| 120 | |
| 121 | ret = bt_ctf_event_class_set_payload_type(event, payload); |
| 122 | if (ret) { |
| 123 | diag("Failed to set simple event payload"); |
| 124 | goto error; |
| 125 | } |
| 126 | end: |
| 127 | BT_PUT(payload); |
| 128 | return event; |
| 129 | error: |
| 130 | BT_PUT(event); |
| 131 | goto end;; |
| 132 | } |
| 133 | |
| 134 | /** |
| 135 | * A complex event has the following payload: |
| 136 | * - uint8_t payload_8; |
| 137 | * - uint16_t payload_16; |
| 138 | * - uint32_t payload_32; |
| 139 | * - struct payload_struct: |
| 140 | * - uint8_t payload_8; |
| 141 | * - uint16_t payload_16; |
| 142 | * - uint32_t payload_32; |
| 143 | */ |
| 144 | static struct bt_ctf_event_class *create_complex_event(const char *name) |
| 145 | { |
| 146 | int ret; |
| 147 | struct bt_ctf_event_class *event = NULL; |
| 148 | struct bt_ctf_field_type *inner = NULL, *outer = NULL; |
| 149 | |
| 150 | assert(name); |
| 151 | event = bt_ctf_event_class_create(name); |
| 152 | if (!event) { |
| 153 | diag("Failed to create complex event"); |
| 154 | goto error; |
| 155 | } |
| 156 | |
| 157 | outer = create_integer_struct(); |
| 158 | if (!outer) { |
| 159 | diag("Failed to initialize integer structure"); |
| 160 | goto error; |
| 161 | } |
| 162 | |
| 163 | inner = create_integer_struct(); |
| 164 | if (!inner) { |
| 165 | diag("Failed to initialize integer structure"); |
| 166 | goto error; |
| 167 | } |
| 168 | |
| 169 | ret = bt_ctf_field_type_structure_add_field(outer, inner, |
| 170 | "payload_struct"); |
| 171 | if (ret) { |
| 172 | diag("Failed to add inner structure to outer structure"); |
| 173 | goto error; |
| 174 | } |
| 175 | |
| 176 | ret = bt_ctf_event_class_set_payload_type(event, outer); |
| 177 | if (ret) { |
| 178 | diag("Failed to set complex event payload"); |
| 179 | goto error; |
| 180 | } |
| 181 | end: |
| 182 | BT_PUT(inner); |
| 183 | BT_PUT(outer); |
| 184 | return event; |
| 185 | error: |
| 186 | BT_PUT(event); |
| 187 | goto end;; |
| 188 | } |
| 189 | |
| 190 | static struct bt_ctf_stream_class *create_sc1(void) |
| 191 | { |
| 192 | int ret; |
| 193 | struct bt_ctf_event_class *ec1 = NULL, *ec2 = NULL; |
| 194 | struct bt_ctf_stream_class *sc1 = NULL, *ret_stream = NULL; |
| 195 | |
| 196 | sc1 = bt_ctf_stream_class_create("sc1"); |
| 197 | if (!sc1) { |
| 198 | diag("Failed to create Stream Class"); |
| 199 | goto error; |
| 200 | } |
| 201 | |
| 202 | ec1 = create_complex_event("ec1"); |
| 203 | if (!ec1) { |
| 204 | diag("Failed to create complex event EC1"); |
| 205 | goto error; |
| 206 | } |
| 207 | ret = bt_ctf_stream_class_add_event_class(sc1, ec1); |
| 208 | if (ret) { |
| 209 | diag("Failed to add EC1 to SC1"); |
| 210 | goto error; |
| 211 | } |
| 212 | |
| 213 | ec2 = create_simple_event("ec2"); |
| 214 | if (!ec2) { |
| 215 | diag("Failed to create simple event EC2"); |
| 216 | goto error; |
| 217 | } |
| 218 | ret = bt_ctf_stream_class_add_event_class(sc1, ec2); |
| 219 | if (ret) { |
| 220 | diag("Failed to add EC1 to SC1"); |
| 221 | goto error; |
| 222 | } |
| 223 | |
| 224 | ret_stream = bt_ctf_event_class_get_stream_class(ec1); |
| 225 | ok(ret_stream == sc1, "Get parent stream SC1 from EC1"); |
| 226 | BT_PUT(ret_stream); |
| 227 | |
| 228 | ret_stream = bt_ctf_event_class_get_stream_class(ec2); |
| 229 | ok(ret_stream == sc1, "Get parent stream SC1 from EC2"); |
| 230 | end: |
| 231 | BT_PUT(ret_stream); |
| 232 | BT_PUT(ec1); |
| 233 | BT_PUT(ec2); |
| 234 | return sc1; |
| 235 | error: |
| 236 | BT_PUT(sc1); |
| 237 | goto end; |
| 238 | } |
| 239 | |
| 240 | static struct bt_ctf_stream_class *create_sc2(void) |
| 241 | { |
| 242 | int ret; |
| 243 | struct bt_ctf_event_class *ec3 = NULL; |
| 244 | struct bt_ctf_stream_class *sc2 = NULL, *ret_stream = NULL; |
| 245 | |
| 246 | sc2 = bt_ctf_stream_class_create("sc2"); |
| 247 | if (!sc2) { |
| 248 | diag("Failed to create Stream Class"); |
| 249 | goto error; |
| 250 | } |
| 251 | |
| 252 | ec3 = create_simple_event("ec3"); |
| 253 | if (!ec3) { |
| 254 | diag("Failed to create simple event EC3"); |
| 255 | goto error; |
| 256 | } |
| 257 | ret = bt_ctf_stream_class_add_event_class(sc2, ec3); |
| 258 | if (ret) { |
| 259 | diag("Failed to add EC3 to SC2"); |
| 260 | goto error; |
| 261 | } |
| 262 | |
| 263 | ret_stream = bt_ctf_event_class_get_stream_class(ec3); |
| 264 | ok(ret_stream == sc2, "Get parent stream SC2 from EC3"); |
| 265 | end: |
| 266 | BT_PUT(ret_stream); |
| 267 | BT_PUT(ec3); |
| 268 | return sc2; |
| 269 | error: |
| 270 | BT_PUT(sc2); |
| 271 | goto end; |
| 272 | } |
| 273 | |
| 274 | static struct bt_ctf_trace *create_tc1(void) |
| 275 | { |
| 276 | int ret; |
| 277 | struct bt_ctf_trace *tc1 = NULL; |
| 278 | struct bt_ctf_stream_class *sc1 = NULL, *sc2 = NULL; |
| 279 | |
| 280 | tc1 = bt_ctf_trace_create(); |
| 281 | if (!tc1) { |
| 282 | diag("bt_ctf_trace_create returned NULL"); |
| 283 | goto error; |
| 284 | } |
| 285 | |
| 286 | sc1 = create_sc1(); |
| 287 | ok(sc1, "Create SC1"); |
| 288 | if (!sc1) { |
| 289 | goto error; |
| 290 | } |
| 291 | ret = bt_ctf_trace_add_stream_class(tc1, sc1); |
| 292 | ok(!ret, "Add SC1 to TC1"); |
| 293 | if (ret) { |
| 294 | goto error; |
| 295 | } |
| 296 | |
| 297 | sc2 = create_sc2(); |
| 298 | ok(sc2, "Create SC2"); |
| 299 | if (!sc2) { |
| 300 | goto error; |
| 301 | } |
| 302 | ret = bt_ctf_trace_add_stream_class(tc1, sc2); |
| 303 | ok(!ret, "Add SC2 to TC1"); |
| 304 | if (ret) { |
| 305 | goto error; |
| 306 | } |
| 307 | end: |
| 308 | BT_PUT(sc1); |
| 309 | BT_PUT(sc2); |
| 310 | return tc1; |
| 311 | error: |
| 312 | BT_PUT(tc1); |
| 313 | goto end; |
| 314 | } |
| 315 | |
| 316 | static void init_weak_refs(struct bt_ctf_trace *tc, |
| 317 | struct bt_ctf_trace **tc1, |
| 318 | struct bt_ctf_stream_class **sc1, |
| 319 | struct bt_ctf_stream_class **sc2, |
| 320 | struct bt_ctf_event_class **ec1, |
| 321 | struct bt_ctf_event_class **ec2, |
| 322 | struct bt_ctf_event_class **ec3) |
| 323 | { |
| 324 | *tc1 = tc; |
| 325 | *sc1 = bt_ctf_trace_get_stream_class(tc, 0); |
| 326 | *sc2 = bt_ctf_trace_get_stream_class(tc, 1); |
| 327 | *ec1 = bt_ctf_stream_class_get_event_class(*sc1, 0); |
| 328 | *ec2 = bt_ctf_stream_class_get_event_class(*sc1, 1); |
| 329 | *ec3 = bt_ctf_stream_class_get_event_class(*sc2, 0); |
| 330 | bt_put(*sc1); |
| 331 | bt_put(*sc2); |
| 332 | bt_put(*ec1); |
| 333 | bt_put(*ec2); |
| 334 | bt_put(*ec3); |
| 335 | } |
| 336 | |
| 337 | /** |
| 338 | * The objective of this test is to implement and expand upon the scenario |
| 339 | * described in the reference counting documentation and ensure that any node of |
| 340 | * the Trace, Stream Class, Event Class, Stream and Event hiearchy keeps all |
| 341 | * other "alive" and reachable. |
| 342 | * |
| 343 | * External tools (e.g. valgrind) should be used to confirm that this |
| 344 | * known-good test does not leak memory. |
| 345 | */ |
| 346 | int main(int argc, char **argv) |
| 347 | { |
| 348 | /** |
| 349 | * Weak pointers to CTF-IR objects are to be used very carefully. |
| 350 | * This is NOT a good practice and is strongly discouraged; this |
| 351 | * is only done to facilitate the validation of expected reference |
| 352 | * counts without affecting them by taking "real" references to the |
| 353 | * objects. |
| 354 | */ |
| 355 | struct bt_ctf_trace *tc1 = NULL, *weak_tc1 = NULL; |
| 356 | struct bt_ctf_stream_class *weak_sc1 = NULL, *weak_sc2 = NULL; |
| 357 | struct bt_ctf_event_class *weak_ec1 = NULL, *weak_ec2 = NULL, |
| 358 | *weak_ec3 = NULL; |
| 359 | struct user user_a = { 0 }, user_b = { 0 }, user_c = { 0 }; |
| 360 | |
| 361 | /* The only reference which exists at this point is on TC1. */ |
| 362 | tc1 = create_tc1(); |
| 363 | ok(tc1, "Initialize trace"); |
| 364 | if (!tc1) { |
| 365 | goto end; |
| 366 | } |
| 367 | |
| 368 | init_weak_refs(tc1, &weak_tc1, &weak_sc1, &weak_sc2, &weak_ec1, |
| 369 | &weak_ec2, &weak_ec3); |
| 370 | plan_no_plan(); |
| 371 | |
| 372 | ok(bt_object_get_ref_count(weak_sc1) == 0, |
| 373 | "Initial SC1 reference count is 0"); |
| 374 | ok(bt_object_get_ref_count(weak_sc2) == 0, |
| 375 | "Initial SC2 reference count is 0"); |
| 376 | ok(bt_object_get_ref_count(weak_ec1) == 0, |
| 377 | "Initial EC1 reference count is 0"); |
| 378 | ok(bt_object_get_ref_count(weak_ec2) == 0, |
| 379 | "Initial EC2 reference count is 0"); |
| 380 | ok(bt_object_get_ref_count(weak_ec3) == 0, |
| 381 | "Initial EC3 reference count is 0"); |
| 382 | |
| 383 | /* User A has ownership of the trace. */ |
| 384 | BT_MOVE(user_a.tc, tc1); |
| 385 | ok(bt_object_get_ref_count(user_a.tc) == 1, |
| 386 | "TC1 reference count is 1"); |
| 387 | |
| 388 | /* User A acquires a reference to SC2 from TC1. */ |
| 389 | user_a.sc = bt_ctf_trace_get_stream_class(user_a.tc, 1); |
| 390 | ok(user_a.sc, "User A acquires SC2 from TC1"); |
| 391 | ok(bt_object_get_ref_count(weak_tc1) == 2, |
| 392 | "TC1 reference count is 2"); |
| 393 | ok(bt_object_get_ref_count(weak_sc2) == 1, |
| 394 | "SC2 reference count is 1"); |
| 395 | |
| 396 | /* User A acquires a reference to EC3 from SC2. */ |
| 397 | user_a.ec = bt_ctf_stream_class_get_event_class(user_a.sc, 0); |
| 398 | ok(user_a.ec, "User A acquires EC3 from SC2"); |
| 399 | ok(bt_object_get_ref_count(weak_tc1) == 2, |
| 400 | "TC1 reference count is 2"); |
| 401 | ok(bt_object_get_ref_count(weak_sc2) == 2, |
| 402 | "SC2 reference count is 2"); |
| 403 | ok(bt_object_get_ref_count(weak_ec3) == 1, |
| 404 | "EC3 reference count is 1"); |
| 405 | |
| 406 | /* User A releases its reference to SC2. */ |
| 407 | diag("User A releases SC2"); |
| 408 | BT_PUT(user_a.sc); |
| 409 | /* |
| 410 | * We keep the pointer to SC2 around to validate its reference |
| 411 | * count. |
| 412 | */ |
| 413 | ok(bt_object_get_ref_count(weak_tc1) == 2, |
| 414 | "TC1 reference count is 2"); |
| 415 | ok(bt_object_get_ref_count(weak_sc2) == 1, |
| 416 | "SC2 reference count is 1"); |
| 417 | ok(bt_object_get_ref_count(weak_ec3) == 1, |
| 418 | "EC3 reference count is 1"); |
| 419 | |
| 420 | /* User A releases its reference to TC1. */ |
| 421 | diag("User A releases TC1"); |
| 422 | BT_PUT(user_a.tc); |
| 423 | /* |
| 424 | * We keep the pointer to TC1 around to validate its reference |
| 425 | * count. |
| 426 | */ |
| 427 | ok(bt_object_get_ref_count(weak_tc1) == 1, |
| 428 | "TC1 reference count is 1"); |
| 429 | ok(bt_object_get_ref_count(weak_sc2) == 1, |
| 430 | "SC2 reference count is 1"); |
| 431 | ok(bt_object_get_ref_count(weak_ec3) == 1, |
| 432 | "EC3 reference count is 1"); |
| 433 | |
| 434 | /* User B acquires a reference to SC1. */ |
| 435 | diag("User B acquires a reference to SC1"); |
| 436 | user_b.sc = bt_get(weak_sc1); |
| 437 | ok(bt_object_get_ref_count(weak_tc1) == 2, |
| 438 | "TC1 reference count is 2"); |
| 439 | ok(bt_object_get_ref_count(weak_sc1) == 1, |
| 440 | "SC1 reference count is 1"); |
| 441 | |
| 442 | /* User C acquires a reference to EC1. */ |
| 443 | diag("User C acquires a reference to EC1"); |
| 444 | user_c.ec = bt_ctf_stream_class_get_event_class(user_b.sc, 0); |
| 445 | ok(bt_object_get_ref_count(weak_ec1) == 1, |
| 446 | "EC1 reference count is 1"); |
| 447 | ok(bt_object_get_ref_count(weak_sc1) == 2, |
| 448 | "SC1 reference count is 2"); |
| 449 | |
| 450 | /* User A releases its reference on EC3. */ |
| 451 | diag("User A releases its reference on EC3"); |
| 452 | BT_PUT(user_a.ec); |
| 453 | ok(bt_object_get_ref_count(weak_ec3) == 0, |
| 454 | "EC3 reference count is 1"); |
| 455 | ok(bt_object_get_ref_count(weak_sc2) == 0, |
| 456 | "SC2 reference count is 0"); |
| 457 | ok(bt_object_get_ref_count(weak_tc1) == 1, |
| 458 | "TC1 reference count is 1"); |
| 459 | |
| 460 | /* User B releases its reference on SC1. */ |
| 461 | diag("User B releases its reference on SC1"); |
| 462 | BT_PUT(user_b.sc); |
| 463 | ok(bt_object_get_ref_count(weak_sc1) == 1, |
| 464 | "SC1 reference count is 1"); |
| 465 | |
| 466 | /* |
| 467 | * User C is the sole owner of an object and is keeping the whole |
| 468 | * trace hierarchy "alive" by holding a reference to EC1. |
| 469 | */ |
| 470 | ok(bt_object_get_ref_count(weak_tc1) == 1, |
| 471 | "TC1 reference count is 1"); |
| 472 | ok(bt_object_get_ref_count(weak_sc1) == 1, |
| 473 | "SC1 reference count is 1"); |
| 474 | ok(bt_object_get_ref_count(weak_sc2) == 0, |
| 475 | "SC2 reference count is 0"); |
| 476 | ok(bt_object_get_ref_count(weak_ec1) == 1, |
| 477 | "EC1 reference count is 1"); |
| 478 | ok(bt_object_get_ref_count(weak_ec2) == 0, |
| 479 | "EC2 reference count is 0"); |
| 480 | ok(bt_object_get_ref_count(weak_ec3) == 0, |
| 481 | "EC3 reference count is 0"); |
| 482 | |
| 483 | /* Reclaim last reference held by User C. */ |
| 484 | BT_PUT(user_c.ec); |
| 485 | end: |
| 486 | return exit_status(); |
| 487 | } |