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dc3fffef PP |
1 | /* |
2 | * serialize.c | |
3 | * | |
4 | * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation | |
5 | * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
6 | * Copyright 2017 Philippe Proulx <pproulx@efficios.com> | |
7 | * | |
8 | * The original author of the serialization functions for Babeltrace 1 | |
9 | * is Mathieu Desnoyers. Philippe Proulx modified the functions in 2017 | |
10 | * to use Babeltrace 2 objects. | |
11 | * | |
12 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
13 | * of this software and associated documentation files (the "Software"), to deal | |
14 | * in the Software without restriction, including without limitation the rights | |
15 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
16 | * copies of the Software, and to permit persons to whom the Software is | |
17 | * furnished to do so, subject to the following conditions: | |
18 | * | |
19 | * The above copyright notice and this permission notice shall be included in | |
20 | * all copies or substantial portions of the Software. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
25 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
26 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
27 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
28 | * SOFTWARE. | |
29 | */ | |
30 | ||
31 | #include <stdio.h> | |
32 | #include <stdint.h> | |
dc3fffef PP |
33 | #include <babeltrace/ctf-ir/field-types.h> |
34 | #include <babeltrace/ctf-ir/field-types-internal.h> | |
35 | #include <babeltrace/ctf-ir/fields.h> | |
36 | #include <babeltrace/ctf-ir/fields-internal.h> | |
37 | #include <babeltrace/ctf-writer/serialize-internal.h> | |
3d9990ac PP |
38 | #include <babeltrace/align-internal.h> |
39 | #include <babeltrace/mmap-align-internal.h> | |
40 | #include <babeltrace/endian-internal.h> | |
41 | #include <babeltrace/bitfield-internal.h> | |
42 | #include <babeltrace/compat/fcntl-internal.h> | |
c55a9f58 | 43 | #include <babeltrace/types.h> |
dc3fffef PP |
44 | #include <glib.h> |
45 | ||
dc3fffef PP |
46 | #if (FLT_RADIX != 2) |
47 | # error "Unsupported floating point radix" | |
48 | #endif | |
49 | ||
50 | union intval { | |
51 | int64_t signd; | |
52 | uint64_t unsignd; | |
53 | }; | |
54 | ||
55 | /* | |
56 | * The aligned read/write functions are expected to be faster than the | |
57 | * bitfield variants. They will be enabled eventually as an | |
58 | * optimisation. | |
59 | */ | |
60 | static | |
61 | int aligned_integer_write(struct bt_ctf_stream_pos *pos, | |
62 | union intval value, unsigned int alignment, unsigned int size, | |
c55a9f58 | 63 | bt_bool is_signed, enum bt_ctf_byte_order byte_order) |
dc3fffef | 64 | { |
c55a9f58 | 65 | bt_bool rbo = (byte_order != BT_CTF_MY_BYTE_ORDER); /* reverse byte order */ |
dc3fffef PP |
66 | |
67 | if (!bt_ctf_stream_pos_align(pos, alignment)) | |
68 | return -EFAULT; | |
69 | ||
70 | if (!bt_ctf_stream_pos_access_ok(pos, size)) | |
71 | return -EFAULT; | |
72 | ||
73 | assert(!(pos->offset % CHAR_BIT)); | |
74 | if (!is_signed) { | |
75 | switch (size) { | |
76 | case 8: | |
77 | { | |
78 | uint8_t v = value.unsignd; | |
79 | ||
80 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
81 | break; | |
82 | } | |
83 | case 16: | |
84 | { | |
85 | uint16_t v = value.unsignd; | |
86 | ||
87 | if (rbo) | |
88 | v = GUINT16_SWAP_LE_BE(v); | |
89 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
90 | break; | |
91 | } | |
92 | case 32: | |
93 | { | |
94 | uint32_t v = value.unsignd; | |
95 | ||
96 | if (rbo) | |
97 | v = GUINT32_SWAP_LE_BE(v); | |
98 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
99 | break; | |
100 | } | |
101 | case 64: | |
102 | { | |
103 | uint64_t v = value.unsignd; | |
104 | ||
105 | if (rbo) | |
106 | v = GUINT64_SWAP_LE_BE(v); | |
107 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
108 | break; | |
109 | } | |
110 | default: | |
c55a9f58 | 111 | assert(BT_FALSE); |
dc3fffef PP |
112 | } |
113 | } else { | |
114 | switch (size) { | |
115 | case 8: | |
116 | { | |
117 | uint8_t v = value.signd; | |
118 | ||
119 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
120 | break; | |
121 | } | |
122 | case 16: | |
123 | { | |
124 | int16_t v = value.signd; | |
125 | ||
126 | if (rbo) | |
127 | v = GUINT16_SWAP_LE_BE(v); | |
128 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
129 | break; | |
130 | } | |
131 | case 32: | |
132 | { | |
133 | int32_t v = value.signd; | |
134 | ||
135 | if (rbo) | |
136 | v = GUINT32_SWAP_LE_BE(v); | |
137 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
138 | break; | |
139 | } | |
140 | case 64: | |
141 | { | |
142 | int64_t v = value.signd; | |
143 | ||
144 | if (rbo) | |
145 | v = GUINT64_SWAP_LE_BE(v); | |
146 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
147 | break; | |
148 | } | |
149 | default: | |
c55a9f58 | 150 | assert(BT_FALSE); |
dc3fffef PP |
151 | } |
152 | } | |
153 | ||
154 | if (!bt_ctf_stream_pos_move(pos, size)) | |
155 | return -EFAULT; | |
156 | return 0; | |
157 | } | |
158 | ||
159 | static | |
160 | int integer_write(struct bt_ctf_stream_pos *pos, union intval value, | |
c55a9f58 | 161 | unsigned int alignment, unsigned int size, bt_bool is_signed, |
dc3fffef PP |
162 | enum bt_ctf_byte_order byte_order) |
163 | { | |
164 | if (!(alignment % CHAR_BIT) | |
165 | && !(size % CHAR_BIT)) { | |
166 | return aligned_integer_write(pos, value, alignment, | |
167 | size, is_signed, byte_order); | |
168 | } | |
169 | ||
170 | if (!bt_ctf_stream_pos_align(pos, alignment)) | |
171 | return -EFAULT; | |
172 | ||
173 | if (!bt_ctf_stream_pos_access_ok(pos, size)) | |
174 | return -EFAULT; | |
175 | ||
176 | if (!is_signed) { | |
177 | if (byte_order == BT_CTF_BYTE_ORDER_LITTLE_ENDIAN) | |
178 | bt_bitfield_write_le(mmap_align_addr(pos->base_mma) + | |
179 | pos->mmap_base_offset, unsigned char, | |
180 | pos->offset, size, value.unsignd); | |
181 | else | |
182 | bt_bitfield_write_be(mmap_align_addr(pos->base_mma) + | |
183 | pos->mmap_base_offset, unsigned char, | |
184 | pos->offset, size, value.unsignd); | |
185 | } else { | |
186 | if (byte_order == BT_CTF_BYTE_ORDER_LITTLE_ENDIAN) | |
187 | bt_bitfield_write_le(mmap_align_addr(pos->base_mma) + | |
188 | pos->mmap_base_offset, unsigned char, | |
189 | pos->offset, size, value.signd); | |
190 | else | |
191 | bt_bitfield_write_be(mmap_align_addr(pos->base_mma) + | |
192 | pos->mmap_base_offset, unsigned char, | |
193 | pos->offset, size, value.signd); | |
194 | } | |
195 | ||
196 | if (!bt_ctf_stream_pos_move(pos, size)) | |
197 | return -EFAULT; | |
198 | return 0; | |
199 | } | |
200 | ||
201 | BT_HIDDEN | |
202 | int bt_ctf_field_integer_write(struct bt_ctf_field_integer *int_field, | |
203 | struct bt_ctf_stream_pos *pos, | |
204 | enum bt_ctf_byte_order native_byte_order) | |
205 | { | |
206 | struct bt_ctf_field_type *type = int_field->parent.type; | |
207 | struct bt_ctf_field_type_integer *int_type = (void *) type; | |
208 | enum bt_ctf_byte_order byte_order; | |
209 | union intval value; | |
210 | ||
211 | byte_order = int_type->user_byte_order; | |
212 | if (byte_order == BT_CTF_BYTE_ORDER_NATIVE) { | |
213 | byte_order = native_byte_order; | |
214 | } | |
215 | ||
216 | value.signd = int_field->payload.signd; | |
217 | value.unsignd = int_field->payload.unsignd; | |
218 | return integer_write(pos, value, type->alignment, | |
219 | int_type->size, int_type->is_signed, | |
220 | byte_order); | |
221 | } | |
222 | ||
223 | BT_HIDDEN | |
224 | int bt_ctf_field_floating_point_write( | |
225 | struct bt_ctf_field_floating_point *flt_field, | |
226 | struct bt_ctf_stream_pos *pos, | |
227 | enum bt_ctf_byte_order native_byte_order) | |
228 | { | |
229 | struct bt_ctf_field_type *type = flt_field->parent.type; | |
230 | struct bt_ctf_field_type_floating_point *flt_type = (void *) type; | |
231 | enum bt_ctf_byte_order byte_order; | |
232 | union intval value; | |
233 | unsigned int size; | |
234 | ||
235 | byte_order = flt_type->user_byte_order; | |
236 | if (byte_order == BT_CTF_BYTE_ORDER_NATIVE) { | |
237 | byte_order = native_byte_order; | |
238 | } | |
239 | ||
240 | if (flt_type->mant_dig == FLT_MANT_DIG) { | |
241 | union u32f { | |
242 | uint32_t u; | |
243 | float f; | |
244 | } u32f; | |
245 | ||
246 | u32f.f = (float) flt_field->payload; | |
247 | value.unsignd = u32f.u; | |
248 | size = 32; | |
249 | } else if (flt_type->mant_dig == DBL_MANT_DIG) { | |
250 | union u64d { | |
251 | uint64_t u; | |
252 | double d; | |
253 | } u64d; | |
254 | ||
255 | u64d.d = flt_field->payload; | |
256 | value.unsignd = u64d.u; | |
257 | size = 64; | |
258 | } else { | |
259 | return -EINVAL; | |
260 | } | |
261 | ||
c55a9f58 | 262 | return integer_write(pos, value, type->alignment, size, BT_FALSE, |
dc3fffef PP |
263 | byte_order); |
264 | } | |
265 | ||
266 | BT_HIDDEN | |
267 | void bt_ctf_stream_pos_packet_seek(struct bt_ctf_stream_pos *pos, size_t index, | |
268 | int whence) | |
269 | { | |
270 | int ret; | |
271 | ||
272 | assert(whence == SEEK_CUR && index == 0); | |
273 | ||
274 | if (pos->base_mma) { | |
275 | /* unmap old base */ | |
276 | ret = munmap_align(pos->base_mma); | |
277 | if (ret) { | |
c55a9f58 | 278 | assert(BT_FALSE); |
dc3fffef PP |
279 | } |
280 | pos->base_mma = NULL; | |
281 | } | |
282 | ||
283 | /* The writer will add padding */ | |
284 | pos->mmap_offset += pos->packet_size / CHAR_BIT; | |
285 | pos->content_size = -1U; /* Unknown at this point */ | |
286 | pos->packet_size = getpagesize() * 8 * CHAR_BIT; | |
287 | do { | |
288 | ret = bt_posix_fallocate(pos->fd, pos->mmap_offset, | |
289 | pos->packet_size / CHAR_BIT); | |
290 | } while (ret == EINTR); | |
291 | assert(ret == 0); | |
292 | pos->offset = 0; | |
293 | ||
294 | /* map new base. Need mapping length from header. */ | |
295 | pos->base_mma = mmap_align(pos->packet_size / CHAR_BIT, pos->prot, | |
296 | pos->flags, pos->fd, pos->mmap_offset); | |
297 | if (pos->base_mma == MAP_FAILED) { | |
c55a9f58 | 298 | assert(BT_FALSE); |
dc3fffef PP |
299 | } |
300 | } |