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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> | |
33 | #include <stdbool.h> | |
34 | #include <babeltrace/ctf-ir/field-types.h> | |
35 | #include <babeltrace/ctf-ir/field-types-internal.h> | |
36 | #include <babeltrace/ctf-ir/fields.h> | |
37 | #include <babeltrace/ctf-ir/fields-internal.h> | |
38 | #include <babeltrace/ctf-writer/serialize-internal.h> | |
39 | #include <babeltrace/align.h> | |
40 | #include <babeltrace/mmap-align.h> | |
41 | #include <babeltrace/endian.h> | |
42 | #include <babeltrace/bitfield.h> | |
43 | #include <babeltrace/compat/fcntl.h> | |
44 | #include <glib.h> | |
45 | ||
46 | /* "Native" to CTF IR byte order */ | |
47 | #if (BYTE_ORDER == LITTLE_ENDIAN) | |
48 | # define MY_BT_CTF_BYTE_ORDER BT_CTF_BYTE_ORDER_LITTLE_ENDIAN | |
49 | #else | |
50 | # define MY_BT_CTF_BYTE_ORDER BT_CTF_BYTE_ORDER_BIG_ENDIAN | |
51 | #endif | |
52 | ||
53 | #if (FLT_RADIX != 2) | |
54 | # error "Unsupported floating point radix" | |
55 | #endif | |
56 | ||
57 | union intval { | |
58 | int64_t signd; | |
59 | uint64_t unsignd; | |
60 | }; | |
61 | ||
62 | /* | |
63 | * The aligned read/write functions are expected to be faster than the | |
64 | * bitfield variants. They will be enabled eventually as an | |
65 | * optimisation. | |
66 | */ | |
67 | static | |
68 | int aligned_integer_write(struct bt_ctf_stream_pos *pos, | |
69 | union intval value, unsigned int alignment, unsigned int size, | |
70 | bool is_signed, enum bt_ctf_byte_order byte_order) | |
71 | { | |
72 | bool rbo = (byte_order != MY_BT_CTF_BYTE_ORDER); /* reverse byte order */ | |
73 | ||
74 | if (!bt_ctf_stream_pos_align(pos, alignment)) | |
75 | return -EFAULT; | |
76 | ||
77 | if (!bt_ctf_stream_pos_access_ok(pos, size)) | |
78 | return -EFAULT; | |
79 | ||
80 | assert(!(pos->offset % CHAR_BIT)); | |
81 | if (!is_signed) { | |
82 | switch (size) { | |
83 | case 8: | |
84 | { | |
85 | uint8_t v = value.unsignd; | |
86 | ||
87 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
88 | break; | |
89 | } | |
90 | case 16: | |
91 | { | |
92 | uint16_t v = value.unsignd; | |
93 | ||
94 | if (rbo) | |
95 | v = GUINT16_SWAP_LE_BE(v); | |
96 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
97 | break; | |
98 | } | |
99 | case 32: | |
100 | { | |
101 | uint32_t v = value.unsignd; | |
102 | ||
103 | if (rbo) | |
104 | v = GUINT32_SWAP_LE_BE(v); | |
105 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
106 | break; | |
107 | } | |
108 | case 64: | |
109 | { | |
110 | uint64_t v = value.unsignd; | |
111 | ||
112 | if (rbo) | |
113 | v = GUINT64_SWAP_LE_BE(v); | |
114 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
115 | break; | |
116 | } | |
117 | default: | |
118 | assert(false); | |
119 | } | |
120 | } else { | |
121 | switch (size) { | |
122 | case 8: | |
123 | { | |
124 | uint8_t v = value.signd; | |
125 | ||
126 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
127 | break; | |
128 | } | |
129 | case 16: | |
130 | { | |
131 | int16_t v = value.signd; | |
132 | ||
133 | if (rbo) | |
134 | v = GUINT16_SWAP_LE_BE(v); | |
135 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
136 | break; | |
137 | } | |
138 | case 32: | |
139 | { | |
140 | int32_t v = value.signd; | |
141 | ||
142 | if (rbo) | |
143 | v = GUINT32_SWAP_LE_BE(v); | |
144 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
145 | break; | |
146 | } | |
147 | case 64: | |
148 | { | |
149 | int64_t v = value.signd; | |
150 | ||
151 | if (rbo) | |
152 | v = GUINT64_SWAP_LE_BE(v); | |
153 | memcpy(bt_ctf_stream_pos_get_addr(pos), &v, sizeof(v)); | |
154 | break; | |
155 | } | |
156 | default: | |
157 | assert(false); | |
158 | } | |
159 | } | |
160 | ||
161 | if (!bt_ctf_stream_pos_move(pos, size)) | |
162 | return -EFAULT; | |
163 | return 0; | |
164 | } | |
165 | ||
166 | static | |
167 | int integer_write(struct bt_ctf_stream_pos *pos, union intval value, | |
168 | unsigned int alignment, unsigned int size, bool is_signed, | |
169 | enum bt_ctf_byte_order byte_order) | |
170 | { | |
171 | if (!(alignment % CHAR_BIT) | |
172 | && !(size % CHAR_BIT)) { | |
173 | return aligned_integer_write(pos, value, alignment, | |
174 | size, is_signed, byte_order); | |
175 | } | |
176 | ||
177 | if (!bt_ctf_stream_pos_align(pos, alignment)) | |
178 | return -EFAULT; | |
179 | ||
180 | if (!bt_ctf_stream_pos_access_ok(pos, size)) | |
181 | return -EFAULT; | |
182 | ||
183 | if (!is_signed) { | |
184 | if (byte_order == BT_CTF_BYTE_ORDER_LITTLE_ENDIAN) | |
185 | bt_bitfield_write_le(mmap_align_addr(pos->base_mma) + | |
186 | pos->mmap_base_offset, unsigned char, | |
187 | pos->offset, size, value.unsignd); | |
188 | else | |
189 | bt_bitfield_write_be(mmap_align_addr(pos->base_mma) + | |
190 | pos->mmap_base_offset, unsigned char, | |
191 | pos->offset, size, value.unsignd); | |
192 | } else { | |
193 | if (byte_order == BT_CTF_BYTE_ORDER_LITTLE_ENDIAN) | |
194 | bt_bitfield_write_le(mmap_align_addr(pos->base_mma) + | |
195 | pos->mmap_base_offset, unsigned char, | |
196 | pos->offset, size, value.signd); | |
197 | else | |
198 | bt_bitfield_write_be(mmap_align_addr(pos->base_mma) + | |
199 | pos->mmap_base_offset, unsigned char, | |
200 | pos->offset, size, value.signd); | |
201 | } | |
202 | ||
203 | if (!bt_ctf_stream_pos_move(pos, size)) | |
204 | return -EFAULT; | |
205 | return 0; | |
206 | } | |
207 | ||
208 | BT_HIDDEN | |
209 | int bt_ctf_field_integer_write(struct bt_ctf_field_integer *int_field, | |
210 | struct bt_ctf_stream_pos *pos, | |
211 | enum bt_ctf_byte_order native_byte_order) | |
212 | { | |
213 | struct bt_ctf_field_type *type = int_field->parent.type; | |
214 | struct bt_ctf_field_type_integer *int_type = (void *) type; | |
215 | enum bt_ctf_byte_order byte_order; | |
216 | union intval value; | |
217 | ||
218 | byte_order = int_type->user_byte_order; | |
219 | if (byte_order == BT_CTF_BYTE_ORDER_NATIVE) { | |
220 | byte_order = native_byte_order; | |
221 | } | |
222 | ||
223 | value.signd = int_field->payload.signd; | |
224 | value.unsignd = int_field->payload.unsignd; | |
225 | return integer_write(pos, value, type->alignment, | |
226 | int_type->size, int_type->is_signed, | |
227 | byte_order); | |
228 | } | |
229 | ||
230 | BT_HIDDEN | |
231 | int bt_ctf_field_floating_point_write( | |
232 | struct bt_ctf_field_floating_point *flt_field, | |
233 | struct bt_ctf_stream_pos *pos, | |
234 | enum bt_ctf_byte_order native_byte_order) | |
235 | { | |
236 | struct bt_ctf_field_type *type = flt_field->parent.type; | |
237 | struct bt_ctf_field_type_floating_point *flt_type = (void *) type; | |
238 | enum bt_ctf_byte_order byte_order; | |
239 | union intval value; | |
240 | unsigned int size; | |
241 | ||
242 | byte_order = flt_type->user_byte_order; | |
243 | if (byte_order == BT_CTF_BYTE_ORDER_NATIVE) { | |
244 | byte_order = native_byte_order; | |
245 | } | |
246 | ||
247 | if (flt_type->mant_dig == FLT_MANT_DIG) { | |
248 | union u32f { | |
249 | uint32_t u; | |
250 | float f; | |
251 | } u32f; | |
252 | ||
253 | u32f.f = (float) flt_field->payload; | |
254 | value.unsignd = u32f.u; | |
255 | size = 32; | |
256 | } else if (flt_type->mant_dig == DBL_MANT_DIG) { | |
257 | union u64d { | |
258 | uint64_t u; | |
259 | double d; | |
260 | } u64d; | |
261 | ||
262 | u64d.d = flt_field->payload; | |
263 | value.unsignd = u64d.u; | |
264 | size = 64; | |
265 | } else { | |
266 | return -EINVAL; | |
267 | } | |
268 | ||
269 | return integer_write(pos, value, type->alignment, size, false, | |
270 | byte_order); | |
271 | } | |
272 | ||
273 | BT_HIDDEN | |
274 | void bt_ctf_stream_pos_packet_seek(struct bt_ctf_stream_pos *pos, size_t index, | |
275 | int whence) | |
276 | { | |
277 | int ret; | |
278 | ||
279 | assert(whence == SEEK_CUR && index == 0); | |
280 | ||
281 | if (pos->base_mma) { | |
282 | /* unmap old base */ | |
283 | ret = munmap_align(pos->base_mma); | |
284 | if (ret) { | |
285 | assert(false); | |
286 | } | |
287 | pos->base_mma = NULL; | |
288 | } | |
289 | ||
290 | /* The writer will add padding */ | |
291 | pos->mmap_offset += pos->packet_size / CHAR_BIT; | |
292 | pos->content_size = -1U; /* Unknown at this point */ | |
293 | pos->packet_size = getpagesize() * 8 * CHAR_BIT; | |
294 | do { | |
295 | ret = bt_posix_fallocate(pos->fd, pos->mmap_offset, | |
296 | pos->packet_size / CHAR_BIT); | |
297 | } while (ret == EINTR); | |
298 | assert(ret == 0); | |
299 | pos->offset = 0; | |
300 | ||
301 | /* map new base. Need mapping length from header. */ | |
302 | pos->base_mma = mmap_align(pos->packet_size / CHAR_BIT, pos->prot, | |
303 | pos->flags, pos->fd, pos->mmap_offset); | |
304 | if (pos->base_mma == MAP_FAILED) { | |
305 | assert(false); | |
306 | } | |
307 | } |