SoW-2020-0002: Trace Hit Counters: trigger error reporting integration
[lttng-tools.git] / src / common / filter.c
1 /*
2 * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
3 *
4 * SPDX-License-Identifier: LGPL-2.1-only
5 *
6 */
7
8 #include "filter.h"
9 #include <stddef.h>
10
11 struct bytecode_symbol_iterator {
12 /* No ownership of bytecode is taken. */
13 char *bytecode;
14 size_t offset, len;
15 };
16
17 LTTNG_HIDDEN
18 struct bytecode_symbol_iterator *bytecode_symbol_iterator_create(
19 struct lttng_bytecode *bytecode)
20 {
21 struct bytecode_symbol_iterator *it = NULL;
22
23 if (!bytecode) {
24 goto end;
25 }
26
27 it = zmalloc(sizeof(*it));
28 if (!it) {
29 goto end;
30 }
31
32 it->bytecode = bytecode->data;
33 it->offset = bytecode->reloc_table_offset;
34 it->len = bytecode->len;
35 end:
36 return it;
37 }
38
39 LTTNG_HIDDEN
40 int bytecode_symbol_iterator_next(struct bytecode_symbol_iterator *it)
41 {
42 int ret;
43 size_t len;
44
45 if (!it || it->offset >= it->len) {
46 ret = -1;
47 goto end;
48 }
49
50 len = strlen(it->bytecode + it->offset + sizeof(uint16_t)) + 1;
51 it->offset += len + sizeof(uint16_t);
52 ret = it->offset >= it->len ? -1 : 0;
53 end:
54 return ret;
55 }
56
57 LTTNG_HIDDEN
58 int bytecode_symbol_iterator_get_type(struct bytecode_symbol_iterator *it)
59 {
60 int ret;
61
62 if (!it) {
63 ret = -1;
64 goto end;
65 }
66
67 ret = *((uint16_t *) (it->bytecode + it->offset));
68 end:
69 return ret;
70 }
71
72 LTTNG_HIDDEN
73 const char *bytecode_symbol_iterator_get_name(
74 struct bytecode_symbol_iterator *it)
75 {
76 const char *ret = NULL;
77
78 if (!it) {
79 goto end;
80 }
81
82 ret = it->bytecode + it->offset + sizeof(uint16_t);
83 end:
84 return ret;
85 }
86
87 LTTNG_HIDDEN
88 void bytecode_symbol_iterator_destroy(struct bytecode_symbol_iterator *it)
89 {
90 free(it);
91 }
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