lib: save and restore current thread error when calling destruction listeners and...
[babeltrace.git] / src / lib / trace-ir / trace-class.c
CommitLineData
862ca4ed 1/*
e2f7325d 2 * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
862ca4ed
PP
3 * Copyright 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 *
862ca4ed
PP
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 */
23
a1a6f91b 24#define BT_LOG_TAG "LIB/TRACE-CLASS"
c2d9d9cf 25#include "lib/logging.h"
862ca4ed 26
578e048b 27#include "lib/assert-pre.h"
3c634c85 28#include "lib/assert-post.h"
3fadfbc0
MJ
29#include <babeltrace2/trace-ir/trace-class.h>
30#include <babeltrace2/trace-ir/trace-class-const.h>
3fadfbc0 31#include <babeltrace2/trace-ir/event-class.h>
578e048b
MJ
32#include "ctf-writer/functor.h"
33#include "ctf-writer/clock.h"
34#include "compat/compiler.h"
3fadfbc0
MJ
35#include <babeltrace2/value.h>
36#include <babeltrace2/value-const.h>
578e048b 37#include "lib/value.h"
3fadfbc0 38#include <babeltrace2/types.h>
578e048b
MJ
39#include "compat/endian.h"
40#include "common/assert.h"
41#include "compat/glib.h"
862ca4ed
PP
42#include <inttypes.h>
43#include <stdint.h>
44#include <string.h>
c4f23e30 45#include <stdbool.h>
862ca4ed
PP
46#include <stdlib.h>
47
578e048b
MJ
48#include "clock-class.h"
49#include "event-class.h"
50#include "event.h"
51#include "field-class.h"
52#include "field-wrapper.h"
53#include "resolve-field-path.h"
54#include "stream-class.h"
55#include "stream.h"
56#include "trace.h"
57#include "utils.h"
c6962c96 58#include "lib/value.h"
d24d5663 59#include "lib/func-status.h"
578e048b 60
ad5268b5
FD
61struct bt_trace_class_destruction_listener_elem {
62 bt_trace_class_destruction_listener_func func;
63 void *data;
64};
65
bdb288b3
PP
66#define BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(_tc) \
67 BT_ASSERT_PRE_DEV_HOT((_tc), "Trace class", ": %!+T", (_tc))
862ca4ed
PP
68
69static
70void destroy_trace_class(struct bt_object *obj)
71{
72 struct bt_trace_class *tc = (void *) obj;
73
74 BT_LIB_LOGD("Destroying trace class object: %!+T", tc);
c6962c96
PP
75 BT_OBJECT_PUT_REF_AND_RESET(tc->user_attributes);
76
ad5268b5
FD
77 /*
78 * Call destruction listener functions so that everything else
79 * still exists in the trace class.
80 */
81 if (tc->destruction_listeners) {
82 uint64_t i;
42a63165
SM
83 const struct bt_error *saved_error;
84
3f7d4d90 85 BT_LIB_LOGD("Calling trace class destruction listener(s): %!+T", tc);
c47a6bec
SM
86
87 /*
88 * The trace class' reference count is 0 if we're here. Increment
89 * it to avoid a double-destroy (possibly infinitely recursive).
90 * This could happen for example if a destruction listener did
91 * bt_object_get_ref() (or anything that causes
92 * bt_object_get_ref() to be called) on the trace class (ref.
93 * count goes from 0 to 1), and then bt_object_put_ref(): the
94 * reference count would go from 1 to 0 again and this function
95 * would be called again.
96 */
97 tc->base.ref_count++;
98
42a63165
SM
99 saved_error = bt_current_thread_take_error();
100
ad5268b5
FD
101 /* Call all the trace class destruction listeners */
102 for (i = 0; i < tc->destruction_listeners->len; i++) {
103 struct bt_trace_class_destruction_listener_elem elem =
104 g_array_index(tc->destruction_listeners,
105 struct bt_trace_class_destruction_listener_elem, i);
106
107 if (elem.func) {
108 elem.func(tc, elem.data);
6ecdcca3 109 BT_ASSERT_POST_NO_ERROR();
ad5268b5 110 }
c47a6bec
SM
111
112 /*
113 * The destruction listener should not have kept a
114 * reference to the trace class.
115 */
3c634c85 116 BT_ASSERT_POST(tc->base.ref_count == 1, "Destruction listener kept a reference to the trace class being destroyed: %![tc-]+T", tc);
ad5268b5
FD
117 }
118 g_array_free(tc->destruction_listeners, TRUE);
119 tc->destruction_listeners = NULL;
42a63165
SM
120
121 if (saved_error) {
122 BT_CURRENT_THREAD_MOVE_ERROR_AND_RESET(saved_error);
123 }
ad5268b5 124 }
862ca4ed 125
862ca4ed
PP
126 if (tc->stream_classes) {
127 BT_LOGD_STR("Destroying stream classes.");
128 g_ptr_array_free(tc->stream_classes, TRUE);
129 tc->stream_classes = NULL;
130 }
131
862ca4ed
PP
132 g_free(tc);
133}
134
41693723 135struct bt_trace_class *bt_trace_class_create(bt_self_component *self_comp)
862ca4ed
PP
136{
137 struct bt_trace_class *tc = NULL;
862ca4ed 138
17f3083a 139 BT_ASSERT_PRE_NO_ERROR();
41693723 140 BT_ASSERT_PRE_NON_NULL(self_comp, "Self component");
862ca4ed
PP
141 BT_LOGD_STR("Creating default trace class object.");
142 tc = g_new0(struct bt_trace_class, 1);
143 if (!tc) {
870631a2 144 BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one trace class.");
862ca4ed
PP
145 goto error;
146 }
147
148 bt_object_init_shared_with_parent(&tc->base, destroy_trace_class);
c6962c96
PP
149 tc->user_attributes = bt_value_map_create();
150 if (!tc->user_attributes) {
151 BT_LIB_LOGE_APPEND_CAUSE(
152 "Failed to create a map value object.");
153 goto error;
154 }
862ca4ed
PP
155
156 tc->stream_classes = g_ptr_array_new_with_free_func(
157 (GDestroyNotify) bt_object_try_spec_release);
158 if (!tc->stream_classes) {
870631a2 159 BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GPtrArray.");
862ca4ed
PP
160 goto error;
161 }
162
ad5268b5
FD
163 tc->destruction_listeners = g_array_new(FALSE, TRUE,
164 sizeof(struct bt_trace_class_destruction_listener_elem));
165 if (!tc->destruction_listeners) {
870631a2 166 BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GArray.");
ad5268b5
FD
167 goto error;
168 }
169
862ca4ed 170 tc->assigns_automatic_stream_class_id = true;
862ca4ed
PP
171 BT_LIB_LOGD("Created trace class object: %!+T", tc);
172 goto end;
173
174error:
175 BT_OBJECT_PUT_REF_AND_RESET(tc);
176
177end:
178 return tc;
179}
180
d24d5663 181enum bt_trace_class_add_listener_status bt_trace_class_add_destruction_listener(
ad5268b5
FD
182 const struct bt_trace_class *_tc,
183 bt_trace_class_destruction_listener_func listener,
2054a0d1 184 void *data, bt_listener_id *listener_id)
ad5268b5
FD
185{
186 struct bt_trace_class *tc = (void *) _tc;
187 uint64_t i;
188 struct bt_trace_class_destruction_listener_elem new_elem = {
189 .func = listener,
190 .data = data,
191 };
192
17f3083a 193 BT_ASSERT_PRE_NO_ERROR();
ad5268b5
FD
194 BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
195 BT_ASSERT_PRE_NON_NULL(listener, "Listener");
196
197 /* Find the next available spot */
198 for (i = 0; i < tc->destruction_listeners->len; i++) {
199 struct bt_trace_class_destruction_listener_elem elem =
200 g_array_index(tc->destruction_listeners,
201 struct bt_trace_class_destruction_listener_elem, i);
202
203 if (!elem.func) {
204 break;
205 }
206 }
207
208 if (i == tc->destruction_listeners->len) {
209 g_array_append_val(tc->destruction_listeners, new_elem);
210 } else {
211 g_array_insert_val(tc->destruction_listeners, i, new_elem);
212 }
213
214 if (listener_id) {
215 *listener_id = i;
216 }
217
3f7d4d90 218 BT_LIB_LOGD("Added trace class destruction listener: %![tc-]+T, "
ad5268b5 219 "listener-id=%" PRIu64, tc, i);
d24d5663 220 return BT_FUNC_STATUS_OK;
ad5268b5
FD
221}
222
ad5268b5
FD
223static
224bool has_listener_id(const struct bt_trace_class *tc, uint64_t listener_id)
225{
226 BT_ASSERT(listener_id < tc->destruction_listeners->len);
227 return (&g_array_index(tc->destruction_listeners,
228 struct bt_trace_class_destruction_listener_elem,
5084732e 229 listener_id))->func;
ad5268b5
FD
230}
231
d24d5663 232enum bt_trace_class_remove_listener_status bt_trace_class_remove_destruction_listener(
2054a0d1 233 const struct bt_trace_class *_tc, bt_listener_id listener_id)
ad5268b5
FD
234{
235 struct bt_trace_class *tc = (void *) _tc;
236 struct bt_trace_class_destruction_listener_elem *elem;
237
17f3083a 238 BT_ASSERT_PRE_NO_ERROR();
ad5268b5
FD
239 BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
240 BT_ASSERT_PRE(has_listener_id(tc, listener_id),
241 "Trace class has no such trace class destruction listener ID: "
242 "%![tc-]+T, %" PRIu64, tc, listener_id);
243 elem = &g_array_index(tc->destruction_listeners,
244 struct bt_trace_class_destruction_listener_elem,
245 listener_id);
246 BT_ASSERT(elem->func);
247
248 elem->func = NULL;
249 elem->data = NULL;
3f7d4d90 250 BT_LIB_LOGD("Removed trace class destruction listener: "
ad5268b5
FD
251 "%![tc-]+T, listener-id=%" PRIu64,
252 tc, listener_id);
d24d5663 253 return BT_FUNC_STATUS_OK;
ad5268b5
FD
254}
255
862ca4ed
PP
256uint64_t bt_trace_class_get_stream_class_count(const struct bt_trace_class *tc)
257{
bdb288b3 258 BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
862ca4ed
PP
259 return (uint64_t) tc->stream_classes->len;
260}
261
262struct bt_stream_class *bt_trace_class_borrow_stream_class_by_index(
263 struct bt_trace_class *tc, uint64_t index)
264{
bdb288b3
PP
265 BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
266 BT_ASSERT_PRE_DEV_VALID_INDEX(index, tc->stream_classes->len);
862ca4ed
PP
267 return g_ptr_array_index(tc->stream_classes, index);
268}
269
270const struct bt_stream_class *
271bt_trace_class_borrow_stream_class_by_index_const(
272 const struct bt_trace_class *tc, uint64_t index)
273{
274 return bt_trace_class_borrow_stream_class_by_index(
275 (void *) tc, index);
276}
277
278struct bt_stream_class *bt_trace_class_borrow_stream_class_by_id(
279 struct bt_trace_class *tc, uint64_t id)
280{
281 struct bt_stream_class *stream_class = NULL;
282 uint64_t i;
283
bdb288b3 284 BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
862ca4ed
PP
285
286 for (i = 0; i < tc->stream_classes->len; i++) {
287 struct bt_stream_class *stream_class_candidate =
288 g_ptr_array_index(tc->stream_classes, i);
289
290 if (stream_class_candidate->id == id) {
291 stream_class = stream_class_candidate;
292 goto end;
293 }
294 }
295
296end:
297 return stream_class;
298}
299
300const struct bt_stream_class *
301bt_trace_class_borrow_stream_class_by_id_const(
302 const struct bt_trace_class *tc, uint64_t id)
303{
304 return bt_trace_class_borrow_stream_class_by_id((void *) tc, id);
305}
306
862ca4ed
PP
307BT_HIDDEN
308void _bt_trace_class_freeze(const struct bt_trace_class *tc)
309{
862ca4ed
PP
310 BT_ASSERT(tc);
311 BT_LIB_LOGD("Freezing trace class: %!+T", tc);
312 ((struct bt_trace_class *) tc)->frozen = true;
313}
314
315bt_bool bt_trace_class_assigns_automatic_stream_class_id(const struct bt_trace_class *tc)
316{
bdb288b3 317 BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
862ca4ed
PP
318 return (bt_bool) tc->assigns_automatic_stream_class_id;
319}
320
321void bt_trace_class_set_assigns_automatic_stream_class_id(struct bt_trace_class *tc,
322 bt_bool value)
323{
324 BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
bdb288b3 325 BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(tc);
862ca4ed 326 tc->assigns_automatic_stream_class_id = (bool) value;
3f7d4d90 327 BT_LIB_LOGD("Set trace class's automatic stream class ID "
862ca4ed
PP
328 "assignment property: %!+T", tc);
329}
c5b9b441 330
c6962c96
PP
331const struct bt_value *bt_trace_class_borrow_user_attributes_const(
332 const struct bt_trace_class *trace_class)
333{
334 BT_ASSERT_PRE_DEV_NON_NULL(trace_class, "Trace class");
335 return trace_class->user_attributes;
336}
337
338struct bt_value *bt_trace_class_borrow_user_attributes(
339 struct bt_trace_class *trace_class)
340{
341 return (void *) bt_trace_class_borrow_user_attributes_const(
342 (void *) trace_class);
343}
344
345void bt_trace_class_set_user_attributes(struct bt_trace_class *trace_class,
346 const struct bt_value *user_attributes)
347{
348 BT_ASSERT_PRE_NON_NULL(trace_class, "Trace class");
349 BT_ASSERT_PRE_NON_NULL(user_attributes, "User attributes");
350 BT_ASSERT_PRE(user_attributes->type == BT_VALUE_TYPE_MAP,
351 "User attributes object is not a map value object.");
352 BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(trace_class);
6871026b 353 bt_object_put_ref_no_null_check(trace_class->user_attributes);
c6962c96 354 trace_class->user_attributes = (void *) user_attributes;
6871026b 355 bt_object_get_ref_no_null_check(trace_class->user_attributes);
c6962c96
PP
356}
357
c5b9b441
PP
358void bt_trace_class_get_ref(const struct bt_trace_class *trace_class)
359{
360 bt_object_get_ref(trace_class);
361}
362
363void bt_trace_class_put_ref(const struct bt_trace_class *trace_class)
364{
365 bt_object_put_ref(trace_class);
366}
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