| 1 | /* |
| 2 | * SPDX-License-Identifier: MIT |
| 3 | * |
| 4 | * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com> |
| 5 | * Copyright 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 6 | */ |
| 7 | |
| 8 | #define BT_LOG_TAG "LIB/TRACE-CLASS" |
| 9 | #include "lib/logging.h" |
| 10 | |
| 11 | #include "lib/assert-cond.h" |
| 12 | #include <babeltrace2/trace-ir/trace-class.h> |
| 13 | #include <babeltrace2/trace-ir/event-class.h> |
| 14 | #include "ctf-writer/functor.h" |
| 15 | #include "ctf-writer/clock.h" |
| 16 | #include "compat/compiler.h" |
| 17 | #include <babeltrace2/value.h> |
| 18 | #include "lib/value.h" |
| 19 | #include <babeltrace2/types.h> |
| 20 | #include "compat/endian.h" |
| 21 | #include "common/assert.h" |
| 22 | #include "compat/glib.h" |
| 23 | #include <inttypes.h> |
| 24 | #include <stdint.h> |
| 25 | #include <string.h> |
| 26 | #include <stdbool.h> |
| 27 | #include <stdlib.h> |
| 28 | |
| 29 | #include "clock-class.h" |
| 30 | #include "event-class.h" |
| 31 | #include "event.h" |
| 32 | #include "field-class.h" |
| 33 | #include "field-wrapper.h" |
| 34 | #include "resolve-field-path.h" |
| 35 | #include "stream-class.h" |
| 36 | #include "stream.h" |
| 37 | #include "trace.h" |
| 38 | #include "utils.h" |
| 39 | #include "lib/value.h" |
| 40 | #include "lib/func-status.h" |
| 41 | |
| 42 | struct bt_trace_class_destruction_listener_elem { |
| 43 | bt_trace_class_destruction_listener_func func; |
| 44 | void *data; |
| 45 | }; |
| 46 | |
| 47 | #define BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(_tc) \ |
| 48 | BT_ASSERT_PRE_DEV_HOT("trace-class", (_tc), "Trace class", \ |
| 49 | ": %!+T", (_tc)) |
| 50 | |
| 51 | #define DESTRUCTION_LISTENER_FUNC_NAME "bt_trace_destruction_listener_func" |
| 52 | |
| 53 | static |
| 54 | void destroy_trace_class(struct bt_object *obj) |
| 55 | { |
| 56 | struct bt_trace_class *tc = (void *) obj; |
| 57 | |
| 58 | BT_LIB_LOGD("Destroying trace class object: %!+T", tc); |
| 59 | BT_OBJECT_PUT_REF_AND_RESET(tc->user_attributes); |
| 60 | |
| 61 | /* |
| 62 | * Call destruction listener functions so that everything else |
| 63 | * still exists in the trace class. |
| 64 | */ |
| 65 | if (tc->destruction_listeners) { |
| 66 | uint64_t i; |
| 67 | const struct bt_error *saved_error; |
| 68 | |
| 69 | BT_LIB_LOGD("Calling trace class destruction listener(s): %!+T", tc); |
| 70 | |
| 71 | /* |
| 72 | * The trace class' reference count is 0 if we're here. Increment |
| 73 | * it to avoid a double-destroy (possibly infinitely recursive). |
| 74 | * This could happen for example if a destruction listener did |
| 75 | * bt_object_get_ref() (or anything that causes |
| 76 | * bt_object_get_ref() to be called) on the trace class (ref. |
| 77 | * count goes from 0 to 1), and then bt_object_put_ref(): the |
| 78 | * reference count would go from 1 to 0 again and this function |
| 79 | * would be called again. |
| 80 | */ |
| 81 | tc->base.ref_count++; |
| 82 | |
| 83 | saved_error = bt_current_thread_take_error(); |
| 84 | |
| 85 | /* Call all the trace class destruction listeners */ |
| 86 | for (i = 0; i < tc->destruction_listeners->len; i++) { |
| 87 | struct bt_trace_class_destruction_listener_elem elem = |
| 88 | g_array_index(tc->destruction_listeners, |
| 89 | struct bt_trace_class_destruction_listener_elem, i); |
| 90 | |
| 91 | if (elem.func) { |
| 92 | elem.func(tc, elem.data); |
| 93 | BT_ASSERT_POST_NO_ERROR( |
| 94 | DESTRUCTION_LISTENER_FUNC_NAME); |
| 95 | } |
| 96 | |
| 97 | /* |
| 98 | * The destruction listener should not have kept a |
| 99 | * reference to the trace class. |
| 100 | */ |
| 101 | BT_ASSERT_POST(DESTRUCTION_LISTENER_FUNC_NAME, |
| 102 | "trace-class-reference-count-not-changed", |
| 103 | tc->base.ref_count == 1, |
| 104 | "Destruction listener kept a reference to the trace class being destroyed: %![tc-]+T", |
| 105 | tc); |
| 106 | } |
| 107 | g_array_free(tc->destruction_listeners, TRUE); |
| 108 | tc->destruction_listeners = NULL; |
| 109 | |
| 110 | if (saved_error) { |
| 111 | BT_CURRENT_THREAD_MOVE_ERROR_AND_RESET(saved_error); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | if (tc->stream_classes) { |
| 116 | BT_LOGD_STR("Destroying stream classes."); |
| 117 | g_ptr_array_free(tc->stream_classes, TRUE); |
| 118 | tc->stream_classes = NULL; |
| 119 | } |
| 120 | |
| 121 | g_free(tc); |
| 122 | } |
| 123 | |
| 124 | BT_EXPORT |
| 125 | struct bt_trace_class *bt_trace_class_create(bt_self_component *self_comp) |
| 126 | { |
| 127 | struct bt_trace_class *tc = NULL; |
| 128 | |
| 129 | BT_ASSERT_PRE_NO_ERROR(); |
| 130 | BT_ASSERT_PRE_COMP_NON_NULL(self_comp); |
| 131 | BT_LOGD_STR("Creating default trace class object."); |
| 132 | tc = g_new0(struct bt_trace_class, 1); |
| 133 | if (!tc) { |
| 134 | BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one trace class."); |
| 135 | goto error; |
| 136 | } |
| 137 | |
| 138 | bt_object_init_shared_with_parent(&tc->base, destroy_trace_class); |
| 139 | tc->user_attributes = bt_value_map_create(); |
| 140 | if (!tc->user_attributes) { |
| 141 | BT_LIB_LOGE_APPEND_CAUSE( |
| 142 | "Failed to create a map value object."); |
| 143 | goto error; |
| 144 | } |
| 145 | |
| 146 | tc->stream_classes = g_ptr_array_new_with_free_func( |
| 147 | (GDestroyNotify) bt_object_try_spec_release); |
| 148 | if (!tc->stream_classes) { |
| 149 | BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GPtrArray."); |
| 150 | goto error; |
| 151 | } |
| 152 | |
| 153 | tc->destruction_listeners = g_array_new(FALSE, TRUE, |
| 154 | sizeof(struct bt_trace_class_destruction_listener_elem)); |
| 155 | if (!tc->destruction_listeners) { |
| 156 | BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GArray."); |
| 157 | goto error; |
| 158 | } |
| 159 | |
| 160 | tc->assigns_automatic_stream_class_id = true; |
| 161 | BT_LIB_LOGD("Created trace class object: %!+T", tc); |
| 162 | goto end; |
| 163 | |
| 164 | error: |
| 165 | BT_OBJECT_PUT_REF_AND_RESET(tc); |
| 166 | |
| 167 | end: |
| 168 | return tc; |
| 169 | } |
| 170 | |
| 171 | BT_EXPORT |
| 172 | enum bt_trace_class_add_listener_status bt_trace_class_add_destruction_listener( |
| 173 | const struct bt_trace_class *_tc, |
| 174 | bt_trace_class_destruction_listener_func listener, |
| 175 | void *data, bt_listener_id *listener_id) |
| 176 | { |
| 177 | struct bt_trace_class *tc = (void *) _tc; |
| 178 | uint64_t i; |
| 179 | struct bt_trace_class_destruction_listener_elem new_elem = { |
| 180 | .func = listener, |
| 181 | .data = data, |
| 182 | }; |
| 183 | |
| 184 | BT_ASSERT_PRE_NO_ERROR(); |
| 185 | BT_ASSERT_PRE_TC_NON_NULL(tc); |
| 186 | BT_ASSERT_PRE_LISTENER_FUNC_NON_NULL(listener); |
| 187 | |
| 188 | /* Find the next available spot */ |
| 189 | for (i = 0; i < tc->destruction_listeners->len; i++) { |
| 190 | struct bt_trace_class_destruction_listener_elem elem = |
| 191 | g_array_index(tc->destruction_listeners, |
| 192 | struct bt_trace_class_destruction_listener_elem, i); |
| 193 | |
| 194 | if (!elem.func) { |
| 195 | break; |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | if (i == tc->destruction_listeners->len) { |
| 200 | g_array_append_val(tc->destruction_listeners, new_elem); |
| 201 | } else { |
| 202 | g_array_insert_val(tc->destruction_listeners, i, new_elem); |
| 203 | } |
| 204 | |
| 205 | if (listener_id) { |
| 206 | *listener_id = i; |
| 207 | } |
| 208 | |
| 209 | BT_LIB_LOGD("Added trace class destruction listener: %![tc-]+T, " |
| 210 | "listener-id=%" PRIu64, tc, i); |
| 211 | return BT_FUNC_STATUS_OK; |
| 212 | } |
| 213 | |
| 214 | static |
| 215 | bool has_listener_id(const struct bt_trace_class *tc, uint64_t listener_id) |
| 216 | { |
| 217 | BT_ASSERT(listener_id < tc->destruction_listeners->len); |
| 218 | return (&g_array_index(tc->destruction_listeners, |
| 219 | struct bt_trace_class_destruction_listener_elem, |
| 220 | listener_id))->func; |
| 221 | } |
| 222 | |
| 223 | BT_EXPORT |
| 224 | enum bt_trace_class_remove_listener_status bt_trace_class_remove_destruction_listener( |
| 225 | const struct bt_trace_class *_tc, bt_listener_id listener_id) |
| 226 | { |
| 227 | struct bt_trace_class *tc = (void *) _tc; |
| 228 | struct bt_trace_class_destruction_listener_elem *elem; |
| 229 | |
| 230 | BT_ASSERT_PRE_NO_ERROR(); |
| 231 | BT_ASSERT_PRE_TC_NON_NULL(tc); |
| 232 | BT_ASSERT_PRE("listener-id-exists", |
| 233 | has_listener_id(tc, listener_id), |
| 234 | "Trace class has no such trace class destruction listener ID: " |
| 235 | "%![tc-]+T, %" PRIu64, tc, listener_id); |
| 236 | elem = &g_array_index(tc->destruction_listeners, |
| 237 | struct bt_trace_class_destruction_listener_elem, |
| 238 | listener_id); |
| 239 | BT_ASSERT(elem->func); |
| 240 | |
| 241 | elem->func = NULL; |
| 242 | elem->data = NULL; |
| 243 | BT_LIB_LOGD("Removed trace class destruction listener: " |
| 244 | "%![tc-]+T, listener-id=%" PRIu64, |
| 245 | tc, listener_id); |
| 246 | return BT_FUNC_STATUS_OK; |
| 247 | } |
| 248 | |
| 249 | BT_EXPORT |
| 250 | uint64_t bt_trace_class_get_stream_class_count(const struct bt_trace_class *tc) |
| 251 | { |
| 252 | BT_ASSERT_PRE_DEV_TC_NON_NULL(tc); |
| 253 | return (uint64_t) tc->stream_classes->len; |
| 254 | } |
| 255 | |
| 256 | BT_EXPORT |
| 257 | struct bt_stream_class *bt_trace_class_borrow_stream_class_by_index( |
| 258 | struct bt_trace_class *tc, uint64_t index) |
| 259 | { |
| 260 | BT_ASSERT_PRE_DEV_TC_NON_NULL(tc); |
| 261 | BT_ASSERT_PRE_DEV_VALID_INDEX(index, tc->stream_classes->len); |
| 262 | return g_ptr_array_index(tc->stream_classes, index); |
| 263 | } |
| 264 | |
| 265 | BT_EXPORT |
| 266 | const struct bt_stream_class * |
| 267 | bt_trace_class_borrow_stream_class_by_index_const( |
| 268 | const struct bt_trace_class *tc, uint64_t index) |
| 269 | { |
| 270 | return bt_trace_class_borrow_stream_class_by_index( |
| 271 | (void *) tc, index); |
| 272 | } |
| 273 | |
| 274 | BT_EXPORT |
| 275 | struct bt_stream_class *bt_trace_class_borrow_stream_class_by_id( |
| 276 | struct bt_trace_class *tc, uint64_t id) |
| 277 | { |
| 278 | struct bt_stream_class *stream_class = NULL; |
| 279 | uint64_t i; |
| 280 | |
| 281 | BT_ASSERT_PRE_DEV_TC_NON_NULL(tc); |
| 282 | |
| 283 | for (i = 0; i < tc->stream_classes->len; i++) { |
| 284 | struct bt_stream_class *stream_class_candidate = |
| 285 | g_ptr_array_index(tc->stream_classes, i); |
| 286 | |
| 287 | if (stream_class_candidate->id == id) { |
| 288 | stream_class = stream_class_candidate; |
| 289 | goto end; |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | end: |
| 294 | return stream_class; |
| 295 | } |
| 296 | |
| 297 | BT_EXPORT |
| 298 | const struct bt_stream_class * |
| 299 | bt_trace_class_borrow_stream_class_by_id_const( |
| 300 | const struct bt_trace_class *tc, uint64_t id) |
| 301 | { |
| 302 | return bt_trace_class_borrow_stream_class_by_id((void *) tc, id); |
| 303 | } |
| 304 | |
| 305 | void _bt_trace_class_freeze(const struct bt_trace_class *tc) |
| 306 | { |
| 307 | BT_ASSERT(tc); |
| 308 | BT_LIB_LOGD("Freezing trace class: %!+T", tc); |
| 309 | ((struct bt_trace_class *) tc)->frozen = true; |
| 310 | } |
| 311 | |
| 312 | BT_EXPORT |
| 313 | bt_bool bt_trace_class_assigns_automatic_stream_class_id(const struct bt_trace_class *tc) |
| 314 | { |
| 315 | BT_ASSERT_PRE_DEV_TC_NON_NULL(tc); |
| 316 | return (bt_bool) tc->assigns_automatic_stream_class_id; |
| 317 | } |
| 318 | |
| 319 | BT_EXPORT |
| 320 | void bt_trace_class_set_assigns_automatic_stream_class_id(struct bt_trace_class *tc, |
| 321 | bt_bool value) |
| 322 | { |
| 323 | BT_ASSERT_PRE_TC_NON_NULL(tc); |
| 324 | BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(tc); |
| 325 | tc->assigns_automatic_stream_class_id = (bool) value; |
| 326 | BT_LIB_LOGD("Set trace class's automatic stream class ID " |
| 327 | "assignment property: %!+T", tc); |
| 328 | } |
| 329 | |
| 330 | BT_EXPORT |
| 331 | const struct bt_value *bt_trace_class_borrow_user_attributes_const( |
| 332 | const struct bt_trace_class *trace_class) |
| 333 | { |
| 334 | BT_ASSERT_PRE_DEV_TC_NON_NULL(trace_class); |
| 335 | return trace_class->user_attributes; |
| 336 | } |
| 337 | |
| 338 | BT_EXPORT |
| 339 | struct bt_value *bt_trace_class_borrow_user_attributes( |
| 340 | struct bt_trace_class *trace_class) |
| 341 | { |
| 342 | return (void *) bt_trace_class_borrow_user_attributes_const( |
| 343 | (void *) trace_class); |
| 344 | } |
| 345 | |
| 346 | BT_EXPORT |
| 347 | void bt_trace_class_set_user_attributes(struct bt_trace_class *trace_class, |
| 348 | const struct bt_value *user_attributes) |
| 349 | { |
| 350 | BT_ASSERT_PRE_TC_NON_NULL(trace_class); |
| 351 | BT_ASSERT_PRE_USER_ATTRS_NON_NULL(user_attributes); |
| 352 | BT_ASSERT_PRE_USER_ATTRS_IS_MAP(user_attributes); |
| 353 | BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(trace_class); |
| 354 | bt_object_put_ref_no_null_check(trace_class->user_attributes); |
| 355 | trace_class->user_attributes = (void *) user_attributes; |
| 356 | bt_object_get_ref_no_null_check(trace_class->user_attributes); |
| 357 | } |
| 358 | |
| 359 | BT_EXPORT |
| 360 | void bt_trace_class_get_ref(const struct bt_trace_class *trace_class) |
| 361 | { |
| 362 | bt_object_get_ref(trace_class); |
| 363 | } |
| 364 | |
| 365 | BT_EXPORT |
| 366 | void bt_trace_class_put_ref(const struct bt_trace_class *trace_class) |
| 367 | { |
| 368 | bt_object_put_ref(trace_class); |
| 369 | } |