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44c440bc | 1 | /* |
0235b0db | 2 | * SPDX-License-Identifier: MIT |
44c440bc | 3 | * |
0235b0db | 4 | * Copyright 2018 Philippe Proulx <pproulx@efficios.com> |
44c440bc PP |
5 | */ |
6 | ||
44c440bc | 7 | #include <glib.h> |
c802cacb | 8 | #include <inttypes.h> |
c4f23e30 | 9 | #include <stdbool.h> |
44c440bc PP |
10 | #include <stdint.h> |
11 | #include <string.h> | |
c802cacb SM |
12 | |
13 | #include <babeltrace2/babeltrace.h> | |
14 | ||
578e048b | 15 | #include "common/assert.h" |
c802cacb SM |
16 | #include "common/macros.h" |
17 | #include "compat/glib.h" | |
44c440bc | 18 | |
087cd0f5 | 19 | #include "ctf-meta-visitors.hpp" |
44c440bc | 20 | |
4164020e | 21 | static void force_update_field_class_in_ir(struct ctf_field_class *fc, bool in_ir) |
83ebb7f1 | 22 | { |
4164020e SM |
23 | uint64_t i; |
24 | ||
25 | if (!fc) { | |
26 | goto end; | |
27 | } | |
28 | ||
29 | fc->in_ir = in_ir; | |
30 | ||
31 | switch (fc->type) { | |
32 | case CTF_FIELD_CLASS_TYPE_STRUCT: | |
33 | { | |
34 | struct ctf_field_class_struct *struct_fc = ctf_field_class_as_struct(fc); | |
35 | ||
36 | for (i = 0; i < struct_fc->members->len; i++) { | |
37 | struct ctf_named_field_class *named_fc = | |
38 | ctf_field_class_struct_borrow_member_by_index(struct_fc, i); | |
39 | ||
40 | force_update_field_class_in_ir(named_fc->fc, in_ir); | |
41 | } | |
42 | ||
43 | break; | |
44 | } | |
45 | case CTF_FIELD_CLASS_TYPE_VARIANT: | |
46 | { | |
47 | struct ctf_named_field_class *named_fc; | |
48 | struct ctf_field_class_variant *var_fc = ctf_field_class_as_variant(fc); | |
49 | ||
50 | for (i = 0; i < var_fc->options->len; i++) { | |
51 | named_fc = ctf_field_class_variant_borrow_option_by_index(var_fc, i); | |
52 | ||
53 | force_update_field_class_in_ir(named_fc->fc, in_ir); | |
54 | } | |
55 | ||
56 | break; | |
57 | } | |
58 | case CTF_FIELD_CLASS_TYPE_ARRAY: | |
59 | case CTF_FIELD_CLASS_TYPE_SEQUENCE: | |
60 | { | |
61 | struct ctf_field_class_array_base *array_fc = ctf_field_class_as_array_base(fc); | |
62 | ||
63 | force_update_field_class_in_ir(array_fc->elem_fc, in_ir); | |
64 | break; | |
65 | } | |
66 | default: | |
67 | break; | |
68 | } | |
83ebb7f1 PP |
69 | |
70 | end: | |
4164020e | 71 | return; |
83ebb7f1 PP |
72 | } |
73 | ||
4164020e | 74 | static void update_field_class_in_ir(struct ctf_field_class *fc, GHashTable *ft_dependents) |
44c440bc | 75 | { |
4164020e SM |
76 | int64_t i; |
77 | ||
78 | if (!fc) { | |
79 | goto end; | |
80 | } | |
81 | ||
82 | switch (fc->type) { | |
83 | case CTF_FIELD_CLASS_TYPE_INT: | |
84 | case CTF_FIELD_CLASS_TYPE_ENUM: | |
85 | { | |
86 | struct ctf_field_class_int *int_fc = ctf_field_class_as_int(fc); | |
87 | ||
88 | /* | |
89 | * Conditions to be in trace IR; one of: | |
90 | * | |
91 | * 1. Does NOT have a mapped clock class AND does not | |
92 | * have a special meaning. | |
93 | * 2. Another field class depends on it. | |
94 | */ | |
95 | if ((!int_fc->mapped_clock_class && int_fc->meaning == CTF_FIELD_CLASS_MEANING_NONE) || | |
96 | bt_g_hash_table_contains(ft_dependents, fc)) { | |
97 | fc->in_ir = true; | |
98 | } | |
99 | ||
100 | break; | |
101 | } | |
102 | case CTF_FIELD_CLASS_TYPE_STRUCT: | |
103 | { | |
104 | struct ctf_field_class_struct *struct_fc = ctf_field_class_as_struct(fc); | |
105 | ||
106 | /* | |
107 | * Make it part of IR if it's empty because it was | |
108 | * originally empty. | |
109 | */ | |
110 | if (struct_fc->members->len == 0) { | |
111 | fc->in_ir = true; | |
112 | } | |
113 | ||
114 | /* Reverse order */ | |
115 | for (i = (int64_t) struct_fc->members->len - 1; i >= 0; i--) { | |
116 | struct ctf_named_field_class *named_fc = | |
117 | ctf_field_class_struct_borrow_member_by_index(struct_fc, i); | |
118 | ||
119 | update_field_class_in_ir(named_fc->fc, ft_dependents); | |
120 | ||
121 | if (named_fc->fc->in_ir) { | |
122 | /* At least one member is part of IR */ | |
123 | fc->in_ir = true; | |
124 | } | |
125 | } | |
126 | ||
127 | break; | |
128 | } | |
129 | case CTF_FIELD_CLASS_TYPE_VARIANT: | |
130 | { | |
131 | struct ctf_named_field_class *named_fc; | |
132 | struct ctf_field_class_variant *var_fc = ctf_field_class_as_variant(fc); | |
133 | ||
134 | /* | |
135 | * Reverse order, although it is not important for this | |
136 | * loop because a field class within a variant field | |
137 | * type's option cannot depend on a field class in | |
138 | * another option of the same variant field class. | |
139 | */ | |
140 | for (i = (int64_t) var_fc->options->len - 1; i >= 0; i--) { | |
141 | named_fc = ctf_field_class_variant_borrow_option_by_index(var_fc, i); | |
142 | ||
143 | update_field_class_in_ir(named_fc->fc, ft_dependents); | |
144 | ||
145 | if (named_fc->fc->in_ir) { | |
146 | /* At least one option is part of IR */ | |
147 | fc->in_ir = true; | |
148 | } | |
149 | } | |
150 | ||
151 | if (fc->in_ir) { | |
152 | /* | |
153 | * At least one option will make it to IR. In | |
154 | * this case, make all options part of IR | |
155 | * because the variant's tag could still select | |
156 | * (dynamically) a removed option. This can mean | |
157 | * having an empty structure as an option, for | |
158 | * example, but at least all the options are | |
159 | * selectable. | |
160 | */ | |
161 | for (i = 0; i < var_fc->options->len; i++) { | |
162 | ctf_field_class_variant_borrow_option_by_index(var_fc, i)->fc->in_ir = true; | |
163 | } | |
164 | ||
165 | /* | |
166 | * This variant field class is part of IR and | |
167 | * depends on a tag field class (which must also | |
168 | * be part of IR). | |
169 | */ | |
170 | g_hash_table_insert(ft_dependents, var_fc->tag_fc, var_fc->tag_fc); | |
171 | } | |
172 | ||
173 | break; | |
174 | } | |
175 | case CTF_FIELD_CLASS_TYPE_ARRAY: | |
176 | case CTF_FIELD_CLASS_TYPE_SEQUENCE: | |
177 | { | |
178 | struct ctf_field_class_array_base *array_fc = ctf_field_class_as_array_base(fc); | |
179 | ||
180 | update_field_class_in_ir(array_fc->elem_fc, ft_dependents); | |
181 | fc->in_ir = array_fc->elem_fc->in_ir; | |
182 | ||
183 | if (fc->type == CTF_FIELD_CLASS_TYPE_ARRAY) { | |
184 | struct ctf_field_class_array *arr_fc = ctf_field_class_as_array(fc); | |
185 | ||
186 | assert(arr_fc->meaning == CTF_FIELD_CLASS_MEANING_NONE || | |
187 | arr_fc->meaning == CTF_FIELD_CLASS_MEANING_UUID); | |
188 | ||
189 | /* | |
190 | * UUID field class: nothing depends on this, so | |
191 | * it's not part of IR. | |
192 | */ | |
193 | if (arr_fc->meaning == CTF_FIELD_CLASS_MEANING_UUID) { | |
194 | fc->in_ir = false; | |
195 | array_fc->elem_fc->in_ir = false; | |
196 | } | |
197 | } else if (fc->type == CTF_FIELD_CLASS_TYPE_SEQUENCE) { | |
198 | if (fc->in_ir) { | |
199 | struct ctf_field_class_sequence *seq_fc = ctf_field_class_as_sequence(fc); | |
200 | ||
201 | /* | |
202 | * This sequence field class is part of | |
203 | * IR and depends on a length field class | |
204 | * (which must also be part of IR). | |
205 | */ | |
206 | g_hash_table_insert(ft_dependents, seq_fc->length_fc, seq_fc->length_fc); | |
207 | } | |
208 | } | |
209 | ||
210 | break; | |
211 | } | |
212 | default: | |
213 | fc->in_ir = true; | |
214 | break; | |
215 | } | |
44c440bc PP |
216 | |
217 | end: | |
4164020e | 218 | return; |
44c440bc PP |
219 | } |
220 | ||
221 | /* | |
5cd6d0e5 PP |
222 | * Scopes and field classes are processed in reverse order because we need |
223 | * to know if a given integer field class has dependents (sequence or | |
224 | * variant field classes) when we reach it. Dependents can only be located | |
225 | * after the length/tag field class in the metadata tree. | |
44c440bc | 226 | */ |
44c440bc PP |
227 | int ctf_trace_class_update_in_ir(struct ctf_trace_class *ctf_tc) |
228 | { | |
4164020e SM |
229 | int ret = 0; |
230 | uint64_t i; | |
231 | ||
232 | GHashTable *ft_dependents = g_hash_table_new(g_direct_hash, g_direct_equal); | |
233 | ||
234 | BT_ASSERT(ft_dependents); | |
235 | ||
236 | for (i = 0; i < ctf_tc->stream_classes->len; i++) { | |
237 | ctf_stream_class *sc = (ctf_stream_class *) ctf_tc->stream_classes->pdata[i]; | |
238 | uint64_t j; | |
239 | ||
240 | for (j = 0; j < sc->event_classes->len; j++) { | |
241 | ctf_event_class *ec = (ctf_event_class *) sc->event_classes->pdata[j]; | |
242 | ||
243 | if (ec->is_translated) { | |
244 | continue; | |
245 | } | |
246 | ||
247 | update_field_class_in_ir(ec->payload_fc, ft_dependents); | |
248 | update_field_class_in_ir(ec->spec_context_fc, ft_dependents); | |
249 | } | |
250 | ||
251 | if (!sc->is_translated) { | |
252 | update_field_class_in_ir(sc->event_common_context_fc, ft_dependents); | |
253 | force_update_field_class_in_ir(sc->event_header_fc, false); | |
254 | update_field_class_in_ir(sc->packet_context_fc, ft_dependents); | |
255 | } | |
256 | } | |
257 | ||
258 | if (!ctf_tc->is_translated) { | |
259 | force_update_field_class_in_ir(ctf_tc->packet_header_fc, false); | |
260 | } | |
261 | ||
262 | g_hash_table_destroy(ft_dependents); | |
263 | return ret; | |
44c440bc | 264 | } |