Commit | Line | Data |
---|---|---|
6dc2ca62 MD |
1 | /* |
2 | * Common Trace Format | |
3 | * | |
4 | * Strings read/write functions. | |
5 | * | |
64fa3fec MD |
6 | * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation |
7 | * | |
8 | * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
6dc2ca62 | 9 | * |
ccd7e1c8 MD |
10 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
11 | * of this software and associated documentation files (the "Software"), to deal | |
12 | * in the Software without restriction, including without limitation the rights | |
13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
14 | * copies of the Software, and to permit persons to whom the Software is | |
15 | * furnished to do so, subject to the following conditions: | |
de0ba614 | 16 | * |
ccd7e1c8 MD |
17 | * The above copyright notice and this permission notice shall be included in |
18 | * all copies or substantial portions of the Software. | |
c462e188 MD |
19 | * |
20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
23 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
24 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
25 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
26 | * SOFTWARE. | |
6dc2ca62 MD |
27 | */ |
28 | ||
70bd0a12 | 29 | #include <babeltrace/babeltrace-internal.h> |
d79865b9 | 30 | #include <babeltrace/ctf/types.h> |
8099326b | 31 | #include <babeltrace/compat/limits.h> /* C99 limits */ |
6dc2ca62 MD |
32 | #include <string.h> |
33 | ||
0d69b916 | 34 | int ctf_string_read(struct bt_stream_pos *ppos, struct bt_definition *definition) |
a52d7f6a | 35 | { |
d11e9c49 MD |
36 | struct definition_string *string_definition = |
37 | container_of(definition, struct definition_string, p); | |
38 | const struct declaration_string *string_declaration = | |
39 | string_definition->declaration; | |
40 | struct ctf_stream_pos *pos = ctf_pos(ppos); | |
a52d7f6a | 41 | size_t len; |
7aefd77d | 42 | ssize_t max_len_bits; |
47e0f2e2 | 43 | char *srcaddr; |
a52d7f6a | 44 | |
70fd5a51 MD |
45 | if (!ctf_align_pos(pos, string_declaration->p.alignment)) |
46 | return -EFAULT; | |
c5e74408 | 47 | |
d11e9c49 | 48 | srcaddr = ctf_get_pos_addr(pos); |
670977d3 | 49 | if (pos->offset == EOF) |
df752f35 | 50 | return -EFAULT; |
7aefd77d MD |
51 | /* Not counting \0. Counting in bits. */ |
52 | max_len_bits = pos->packet_size - pos->offset - CHAR_BIT; | |
53 | if (max_len_bits < 0) | |
c5e74408 | 54 | return -EFAULT; |
7aefd77d MD |
55 | /* Add \0, counting in bytes. */ |
56 | len = strnlen(srcaddr, (size_t) max_len_bits / CHAR_BIT) + 1; | |
c5e74408 MD |
57 | /* Truncated string, unexpected. Trace probably corrupted. */ |
58 | if (srcaddr[len - 1] != '\0') | |
59 | return -EFAULT; | |
60 | ||
d11e9c49 MD |
61 | if (string_definition->alloc_len < len) { |
62 | string_definition->value = | |
63 | g_realloc(string_definition->value, len); | |
64 | string_definition->alloc_len = len; | |
65 | } | |
847bf71a | 66 | printf_debug("CTF string read %s\n", srcaddr); |
d11e9c49 MD |
67 | memcpy(string_definition->value, srcaddr, len); |
68 | string_definition->len = len; | |
70fd5a51 MD |
69 | if (!ctf_move_pos(pos, len * CHAR_BIT)) |
70 | return -EFAULT; | |
c5e74408 | 71 | return 0; |
6dc2ca62 | 72 | } |
a52d7f6a | 73 | |
1cf393f6 | 74 | int ctf_string_write(struct bt_stream_pos *ppos, |
0d69b916 | 75 | struct bt_definition *definition) |
a52d7f6a | 76 | { |
d11e9c49 MD |
77 | struct definition_string *string_definition = |
78 | container_of(definition, struct definition_string, p); | |
79 | const struct declaration_string *string_declaration = | |
80 | string_definition->declaration; | |
81 | struct ctf_stream_pos *pos = ctf_pos(ppos); | |
a52d7f6a | 82 | size_t len; |
47e0f2e2 | 83 | char *destaddr; |
a52d7f6a | 84 | |
70fd5a51 MD |
85 | if (!ctf_align_pos(pos, string_declaration->p.alignment)) |
86 | return -EFAULT; | |
d11e9c49 MD |
87 | assert(string_definition->value != NULL); |
88 | len = string_definition->len; | |
c5e74408 MD |
89 | |
90 | if (!ctf_pos_access_ok(pos, len)) | |
91 | return -EFAULT; | |
92 | ||
d11e9c49 | 93 | if (pos->dummy) |
a52d7f6a | 94 | goto end; |
d11e9c49 | 95 | destaddr = ctf_get_pos_addr(pos); |
8563e754 | 96 | memcpy(destaddr, string_definition->value, len); |
a52d7f6a | 97 | end: |
70fd5a51 MD |
98 | if (!ctf_move_pos(pos, len * CHAR_BIT)) |
99 | return -EFAULT; | |
c5e74408 | 100 | return 0; |
a52d7f6a | 101 | } |