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a0bcd369 PP |
1 | /* |
2 | * Copyright 2019 Philippe Proulx <pproulx@efficios.com> | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
5 | * of this software and associated documentation files (the "Software"), to deal | |
6 | * in the Software without restriction, including without limitation the rights | |
7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
8 | * copies of the Software, and to permit persons to whom the Software is | |
9 | * furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
20 | * SOFTWARE. | |
21 | */ | |
22 | ||
23 | #define BT_LOG_TAG "PLUGIN-TEXT-DETAILS-SINK-OBJ-LIFETIME-MGMT" | |
24 | #include "logging.h" | |
25 | ||
26 | #include <babeltrace2/babeltrace.h> | |
27 | ||
28 | #include "common/common.h" | |
29 | #include "common/assert.h" | |
30 | #include "compat/glib.h" | |
31 | ||
32 | #include "details.h" | |
33 | #include "write.h" | |
34 | #include "obj-lifetime-mgmt.h" | |
35 | ||
36 | static | |
37 | void trace_class_destruction_listener(const bt_trace_class *tc, void *data) | |
38 | { | |
39 | struct details_comp *details_comp = data; | |
40 | ||
41 | BT_ASSERT(details_comp); | |
42 | BT_ASSERT(details_comp->meta); | |
43 | ||
44 | /* Remove from hash table, which also destroys the value */ | |
45 | g_hash_table_remove(details_comp->meta, tc); | |
46 | } | |
47 | ||
48 | static | |
49 | struct details_trace_class_meta *borrow_trace_class_meta( | |
50 | struct details_write_ctx *ctx, const bt_trace_class *tc) | |
51 | { | |
52 | struct details_trace_class_meta *details_tc_meta; | |
53 | ||
54 | BT_ASSERT(ctx->details_comp->cfg.with_meta); | |
55 | BT_ASSERT(ctx->details_comp->meta); | |
56 | details_tc_meta = g_hash_table_lookup(ctx->details_comp->meta, tc); | |
57 | if (!details_tc_meta) { | |
58 | /* Not found: create one */ | |
59 | details_tc_meta = details_create_details_trace_class_meta(); | |
60 | if (!details_tc_meta) { | |
61 | goto error; | |
62 | } | |
63 | ||
64 | /* Register trace class destruction listener */ | |
65 | if (bt_trace_class_add_destruction_listener(tc, | |
66 | trace_class_destruction_listener, | |
67 | ctx->details_comp, | |
68 | &details_tc_meta->tc_destruction_listener_id)) { | |
69 | goto error; | |
70 | } | |
71 | ||
72 | /* Insert into hash table (becomes the owner) */ | |
73 | g_hash_table_insert(ctx->details_comp->meta, (void *) tc, | |
74 | details_tc_meta); | |
75 | } | |
76 | ||
77 | goto end; | |
78 | ||
79 | error: | |
80 | details_destroy_details_trace_class_meta(details_tc_meta); | |
81 | details_tc_meta = NULL; | |
82 | ||
83 | end: | |
84 | return details_tc_meta; | |
85 | } | |
86 | ||
87 | BT_HIDDEN | |
88 | bool details_need_to_write_meta_object(struct details_write_ctx *ctx, | |
89 | const bt_trace_class *tc, const void *obj) | |
90 | { | |
91 | bool need_to_write; | |
92 | struct details_trace_class_meta *details_tc_meta; | |
93 | ||
94 | if (!ctx->details_comp->cfg.with_meta) { | |
95 | need_to_write = false; | |
96 | goto end; | |
97 | } | |
98 | ||
99 | BT_ASSERT(ctx->details_comp->meta); | |
100 | details_tc_meta = g_hash_table_lookup(ctx->details_comp->meta, tc); | |
101 | BT_ASSERT(details_tc_meta); | |
102 | need_to_write = | |
103 | g_hash_table_lookup(details_tc_meta->objects, obj) == NULL; | |
104 | ||
105 | end: | |
106 | return need_to_write; | |
107 | } | |
108 | ||
109 | BT_HIDDEN | |
110 | void details_did_write_meta_object(struct details_write_ctx *ctx, | |
111 | const bt_trace_class *tc, const void *obj) | |
112 | { | |
113 | struct details_trace_class_meta *details_tc_meta; | |
114 | ||
115 | BT_ASSERT(ctx->details_comp->cfg.with_meta); | |
116 | details_tc_meta = borrow_trace_class_meta(ctx, tc); | |
117 | BT_ASSERT(details_tc_meta); | |
118 | g_hash_table_insert(details_tc_meta->objects, (gpointer) obj, | |
119 | GUINT_TO_POINTER(1)); | |
120 | } | |
121 | ||
122 | BT_HIDDEN | |
123 | bool details_need_to_write_trace_class(struct details_write_ctx *ctx, | |
124 | const bt_trace_class *tc) | |
125 | { | |
126 | struct details_trace_class_meta *details_tc_meta; | |
127 | bool need_to_write; | |
128 | ||
129 | if (!ctx->details_comp->cfg.with_meta) { | |
130 | need_to_write = false; | |
131 | goto end; | |
132 | } | |
133 | ||
134 | BT_ASSERT(ctx->details_comp->meta); | |
135 | details_tc_meta = g_hash_table_lookup(ctx->details_comp->meta, tc); | |
136 | need_to_write = details_tc_meta == NULL; | |
137 | ||
138 | end: | |
139 | return need_to_write; | |
140 | } | |
141 | ||
142 | BT_HIDDEN | |
143 | int details_did_write_trace_class(struct details_write_ctx *ctx, | |
144 | const bt_trace_class *tc) | |
145 | { | |
146 | int ret = 0; | |
147 | struct details_trace_class_meta *details_tc_meta; | |
148 | ||
149 | BT_ASSERT(ctx->details_comp->cfg.with_meta); | |
150 | ||
151 | /* borrow_trace_class_meta() creates an entry if none exists */ | |
152 | details_tc_meta = borrow_trace_class_meta(ctx, tc); | |
153 | if (!details_tc_meta) { | |
154 | ret = -1; | |
155 | } | |
156 | ||
157 | return ret; | |
158 | } | |
159 | ||
160 | static | |
161 | void trace_destruction_listener(const bt_trace *trace, void *data) | |
162 | { | |
163 | struct details_comp *details_comp = data; | |
164 | ||
165 | BT_ASSERT(details_comp); | |
166 | BT_ASSERT(details_comp->traces); | |
167 | ||
168 | /* Remove from hash table, which also destroys the value */ | |
169 | g_hash_table_remove(details_comp->traces, trace); | |
170 | } | |
171 | ||
172 | static | |
173 | struct details_trace *create_details_trace(uint64_t unique_id) | |
174 | { | |
175 | struct details_trace *details_trace = g_new0(struct details_trace, 1); | |
176 | ||
177 | if (!details_trace) { | |
178 | goto end; | |
179 | } | |
180 | ||
181 | details_trace->unique_id = unique_id; | |
182 | details_trace->trace_destruction_listener_id = UINT64_C(-1); | |
183 | ||
184 | end: | |
185 | return details_trace; | |
186 | } | |
187 | ||
188 | ||
189 | BT_HIDDEN | |
190 | int details_trace_unique_id(struct details_write_ctx *ctx, | |
191 | const bt_trace *trace, uint64_t *unique_id) | |
192 | { | |
193 | int ret = 0; | |
194 | struct details_trace *details_trace = NULL; | |
195 | ||
196 | BT_ASSERT(unique_id); | |
197 | BT_ASSERT(ctx->details_comp->traces); | |
198 | if (!bt_g_hash_table_contains(ctx->details_comp->traces, | |
199 | trace)) { | |
200 | /* Not found: create one */ | |
201 | *unique_id = ctx->details_comp->next_unique_trace_id; | |
202 | details_trace = create_details_trace(*unique_id); | |
203 | if (!details_trace) { | |
204 | goto error; | |
205 | } | |
206 | ||
207 | ctx->details_comp->next_unique_trace_id++; | |
208 | ||
209 | /* Register trace destruction listener if there's none */ | |
210 | if (bt_trace_add_destruction_listener(trace, | |
211 | trace_destruction_listener, | |
212 | ctx->details_comp, | |
213 | &details_trace->trace_destruction_listener_id)) { | |
214 | goto error; | |
215 | } | |
216 | ||
217 | BT_ASSERT(details_trace->trace_destruction_listener_id != | |
218 | UINT64_C(-1)); | |
219 | ||
220 | /* Move to hash table */ | |
221 | g_hash_table_insert(ctx->details_comp->traces, (gpointer) trace, | |
222 | details_trace); | |
223 | details_trace = NULL; | |
224 | } else { | |
225 | /* Found */ | |
226 | details_trace = g_hash_table_lookup( | |
227 | ctx->details_comp->traces, trace); | |
228 | *unique_id = details_trace->unique_id; | |
229 | details_trace = NULL; | |
230 | } | |
231 | ||
232 | goto end; | |
233 | ||
234 | error: | |
235 | ret = -1; | |
236 | ||
237 | end: | |
238 | if (details_trace) { | |
239 | g_free(details_trace); | |
240 | } | |
241 | ||
242 | return ret; | |
243 | } |