1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
|
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2024, Oracle and/or its affiliates. */
#include <test_progs.h>
#include <bpf/btf.h>
#include "btf_helpers.h"
/* Fabricate base, split BTF with references to base types needed; then create
* split BTF with distilled base BTF and ensure expectations are met:
* - only referenced base types from split BTF are present
* - struct/union/enum are represented as empty unless anonymous, when they
* are represented in full in split BTF
*/
static void test_distilled_base(void)
{
struct btf *btf1 = NULL, *btf2 = NULL, *btf3 = NULL, *btf4 = NULL;
btf1 = btf__new_empty();
if (!ASSERT_OK_PTR(btf1, "empty_main_btf"))
return;
btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [1] int */
btf__add_ptr(btf1, 1); /* [2] ptr to int */
btf__add_struct(btf1, "s1", 8); /* [3] struct s1 { */
btf__add_field(btf1, "f1", 2, 0, 0); /* int *f1; */
/* } */
btf__add_struct(btf1, "", 12); /* [4] struct { */
btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */
btf__add_field(btf1, "f2", 3, 32, 0); /* struct s1 f2; */
/* } */
btf__add_int(btf1, "unsigned int", 4, 0); /* [5] unsigned int */
btf__add_union(btf1, "u1", 12); /* [6] union u1 { */
btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */
btf__add_field(btf1, "f2", 2, 0, 0); /* int *f2; */
/* } */
btf__add_union(btf1, "", 4); /* [7] union { */
btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */
/* } */
btf__add_enum(btf1, "e1", 4); /* [8] enum e1 { */
btf__add_enum_value(btf1, "v1", 1); /* v1 = 1; */
/* } */
btf__add_enum(btf1, "", 4); /* [9] enum { */
btf__add_enum_value(btf1, "av1", 2); /* av1 = 2; */
/* } */
btf__add_enum64(btf1, "e641", 8, true); /* [10] enum64 { */
btf__add_enum64_value(btf1, "v1", 1024); /* v1 = 1024; */
/* } */
btf__add_enum64(btf1, "", 8, true); /* [11] enum64 { */
btf__add_enum64_value(btf1, "v1", 1025); /* v1 = 1025; */
/* } */
btf__add_struct(btf1, "unneeded", 4); /* [12] struct unneeded { */
btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */
/* } */
btf__add_struct(btf1, "embedded", 4); /* [13] struct embedded { */
btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */
/* } */
btf__add_func_proto(btf1, 1); /* [14] int (*)(int *p1); */
btf__add_func_param(btf1, "p1", 1);
btf__add_array(btf1, 1, 1, 3); /* [15] int [3]; */
btf__add_struct(btf1, "from_proto", 4); /* [16] struct from_proto { */
btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */
/* } */
btf__add_union(btf1, "u1", 4); /* [17] union u1 { */
btf__add_field(btf1, "f1", 1, 0, 0); /* int f1; */
/* } */
VALIDATE_RAW_BTF(
btf1,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] PTR '(anon)' type_id=1",
"[3] STRUCT 's1' size=8 vlen=1\n"
"\t'f1' type_id=2 bits_offset=0",
"[4] STRUCT '(anon)' size=12 vlen=2\n"
"\t'f1' type_id=1 bits_offset=0\n"
"\t'f2' type_id=3 bits_offset=32",
"[5] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none)",
"[6] UNION 'u1' size=12 vlen=2\n"
"\t'f1' type_id=1 bits_offset=0\n"
"\t'f2' type_id=2 bits_offset=0",
"[7] UNION '(anon)' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[8] ENUM 'e1' encoding=UNSIGNED size=4 vlen=1\n"
"\t'v1' val=1",
"[9] ENUM '(anon)' encoding=UNSIGNED size=4 vlen=1\n"
"\t'av1' val=2",
"[10] ENUM64 'e641' encoding=SIGNED size=8 vlen=1\n"
"\t'v1' val=1024",
"[11] ENUM64 '(anon)' encoding=SIGNED size=8 vlen=1\n"
"\t'v1' val=1025",
"[12] STRUCT 'unneeded' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[13] STRUCT 'embedded' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[14] FUNC_PROTO '(anon)' ret_type_id=1 vlen=1\n"
"\t'p1' type_id=1",
"[15] ARRAY '(anon)' type_id=1 index_type_id=1 nr_elems=3",
"[16] STRUCT 'from_proto' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[17] UNION 'u1' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0");
btf2 = btf__new_empty_split(btf1);
if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
goto cleanup;
btf__add_ptr(btf2, 3); /* [18] ptr to struct s1 */
/* add ptr to struct anon */
btf__add_ptr(btf2, 4); /* [19] ptr to struct (anon) */
btf__add_const(btf2, 6); /* [20] const union u1 */
btf__add_restrict(btf2, 7); /* [21] restrict union (anon) */
btf__add_volatile(btf2, 8); /* [22] volatile enum e1 */
btf__add_typedef(btf2, "et", 9); /* [23] typedef enum (anon) */
btf__add_const(btf2, 10); /* [24] const enum64 e641 */
btf__add_ptr(btf2, 11); /* [25] restrict enum64 (anon) */
btf__add_struct(btf2, "with_embedded", 4); /* [26] struct with_embedded { */
btf__add_field(btf2, "f1", 13, 0, 0); /* struct embedded f1; */
/* } */
btf__add_func(btf2, "fn", BTF_FUNC_STATIC, 14); /* [27] int fn(int p1); */
btf__add_typedef(btf2, "arraytype", 15); /* [28] typedef int[3] foo; */
btf__add_func_proto(btf2, 1); /* [29] int (*)(struct from proto p1); */
btf__add_func_param(btf2, "p1", 16);
VALIDATE_RAW_BTF(
btf2,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] PTR '(anon)' type_id=1",
"[3] STRUCT 's1' size=8 vlen=1\n"
"\t'f1' type_id=2 bits_offset=0",
"[4] STRUCT '(anon)' size=12 vlen=2\n"
"\t'f1' type_id=1 bits_offset=0\n"
"\t'f2' type_id=3 bits_offset=32",
"[5] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none)",
"[6] UNION 'u1' size=12 vlen=2\n"
"\t'f1' type_id=1 bits_offset=0\n"
"\t'f2' type_id=2 bits_offset=0",
"[7] UNION '(anon)' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[8] ENUM 'e1' encoding=UNSIGNED size=4 vlen=1\n"
"\t'v1' val=1",
"[9] ENUM '(anon)' encoding=UNSIGNED size=4 vlen=1\n"
"\t'av1' val=2",
"[10] ENUM64 'e641' encoding=SIGNED size=8 vlen=1\n"
"\t'v1' val=1024",
"[11] ENUM64 '(anon)' encoding=SIGNED size=8 vlen=1\n"
"\t'v1' val=1025",
"[12] STRUCT 'unneeded' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[13] STRUCT 'embedded' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[14] FUNC_PROTO '(anon)' ret_type_id=1 vlen=1\n"
"\t'p1' type_id=1",
"[15] ARRAY '(anon)' type_id=1 index_type_id=1 nr_elems=3",
"[16] STRUCT 'from_proto' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[17] UNION 'u1' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[18] PTR '(anon)' type_id=3",
"[19] PTR '(anon)' type_id=4",
"[20] CONST '(anon)' type_id=6",
"[21] RESTRICT '(anon)' type_id=7",
"[22] VOLATILE '(anon)' type_id=8",
"[23] TYPEDEF 'et' type_id=9",
"[24] CONST '(anon)' type_id=10",
"[25] PTR '(anon)' type_id=11",
"[26] STRUCT 'with_embedded' size=4 vlen=1\n"
"\t'f1' type_id=13 bits_offset=0",
"[27] FUNC 'fn' type_id=14 linkage=static",
"[28] TYPEDEF 'arraytype' type_id=15",
"[29] FUNC_PROTO '(anon)' ret_type_id=1 vlen=1\n"
"\t'p1' type_id=16");
if (!ASSERT_EQ(0, btf__distill_base(btf2, &btf3, &btf4),
"distilled_base") ||
!ASSERT_OK_PTR(btf3, "distilled_base") ||
!ASSERT_OK_PTR(btf4, "distilled_split") ||
!ASSERT_EQ(8, btf__type_cnt(btf3), "distilled_base_type_cnt"))
goto cleanup;
VALIDATE_RAW_BTF(
btf4,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] STRUCT 's1' size=8 vlen=0",
"[3] UNION 'u1' size=12 vlen=0",
"[4] ENUM 'e1' encoding=UNSIGNED size=4 vlen=0",
"[5] ENUM 'e641' encoding=UNSIGNED size=8 vlen=0",
"[6] STRUCT 'embedded' size=4 vlen=0",
"[7] STRUCT 'from_proto' size=4 vlen=0",
/* split BTF; these types should match split BTF above from 17-28, with
* updated type id references
*/
"[8] PTR '(anon)' type_id=2",
"[9] PTR '(anon)' type_id=20",
"[10] CONST '(anon)' type_id=3",
"[11] RESTRICT '(anon)' type_id=21",
"[12] VOLATILE '(anon)' type_id=4",
"[13] TYPEDEF 'et' type_id=22",
"[14] CONST '(anon)' type_id=5",
"[15] PTR '(anon)' type_id=23",
"[16] STRUCT 'with_embedded' size=4 vlen=1\n"
"\t'f1' type_id=6 bits_offset=0",
"[17] FUNC 'fn' type_id=24 linkage=static",
"[18] TYPEDEF 'arraytype' type_id=25",
"[19] FUNC_PROTO '(anon)' ret_type_id=1 vlen=1\n"
"\t'p1' type_id=7",
/* split BTF types added from original base BTF below */
"[20] STRUCT '(anon)' size=12 vlen=2\n"
"\t'f1' type_id=1 bits_offset=0\n"
"\t'f2' type_id=2 bits_offset=32",
"[21] UNION '(anon)' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[22] ENUM '(anon)' encoding=UNSIGNED size=4 vlen=1\n"
"\t'av1' val=2",
"[23] ENUM64 '(anon)' encoding=SIGNED size=8 vlen=1\n"
"\t'v1' val=1025",
"[24] FUNC_PROTO '(anon)' ret_type_id=1 vlen=1\n"
"\t'p1' type_id=1",
"[25] ARRAY '(anon)' type_id=1 index_type_id=1 nr_elems=3");
if (!ASSERT_EQ(btf__relocate(btf4, btf1), 0, "relocate_split"))
goto cleanup;
VALIDATE_RAW_BTF(
btf4,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] PTR '(anon)' type_id=1",
"[3] STRUCT 's1' size=8 vlen=1\n"
"\t'f1' type_id=2 bits_offset=0",
"[4] STRUCT '(anon)' size=12 vlen=2\n"
"\t'f1' type_id=1 bits_offset=0\n"
"\t'f2' type_id=3 bits_offset=32",
"[5] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none)",
"[6] UNION 'u1' size=12 vlen=2\n"
"\t'f1' type_id=1 bits_offset=0\n"
"\t'f2' type_id=2 bits_offset=0",
"[7] UNION '(anon)' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[8] ENUM 'e1' encoding=UNSIGNED size=4 vlen=1\n"
"\t'v1' val=1",
"[9] ENUM '(anon)' encoding=UNSIGNED size=4 vlen=1\n"
"\t'av1' val=2",
"[10] ENUM64 'e641' encoding=SIGNED size=8 vlen=1\n"
"\t'v1' val=1024",
"[11] ENUM64 '(anon)' encoding=SIGNED size=8 vlen=1\n"
"\t'v1' val=1025",
"[12] STRUCT 'unneeded' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[13] STRUCT 'embedded' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[14] FUNC_PROTO '(anon)' ret_type_id=1 vlen=1\n"
"\t'p1' type_id=1",
"[15] ARRAY '(anon)' type_id=1 index_type_id=1 nr_elems=3",
"[16] STRUCT 'from_proto' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[17] UNION 'u1' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[18] PTR '(anon)' type_id=3",
"[19] PTR '(anon)' type_id=30",
"[20] CONST '(anon)' type_id=6",
"[21] RESTRICT '(anon)' type_id=31",
"[22] VOLATILE '(anon)' type_id=8",
"[23] TYPEDEF 'et' type_id=32",
"[24] CONST '(anon)' type_id=10",
"[25] PTR '(anon)' type_id=33",
"[26] STRUCT 'with_embedded' size=4 vlen=1\n"
"\t'f1' type_id=13 bits_offset=0",
"[27] FUNC 'fn' type_id=34 linkage=static",
"[28] TYPEDEF 'arraytype' type_id=35",
"[29] FUNC_PROTO '(anon)' ret_type_id=1 vlen=1\n"
"\t'p1' type_id=16",
/* below here are (duplicate) anon base types added by distill
* process to split BTF.
*/
"[30] STRUCT '(anon)' size=12 vlen=2\n"
"\t'f1' type_id=1 bits_offset=0\n"
"\t'f2' type_id=3 bits_offset=32",
"[31] UNION '(anon)' size=4 vlen=1\n"
"\t'f1' type_id=1 bits_offset=0",
"[32] ENUM '(anon)' encoding=UNSIGNED size=4 vlen=1\n"
"\t'av1' val=2",
"[33] ENUM64 '(anon)' encoding=SIGNED size=8 vlen=1\n"
"\t'v1' val=1025",
"[34] FUNC_PROTO '(anon)' ret_type_id=1 vlen=1\n"
"\t'p1' type_id=1",
"[35] ARRAY '(anon)' type_id=1 index_type_id=1 nr_elems=3");
cleanup:
btf__free(btf4);
btf__free(btf3);
btf__free(btf2);
btf__free(btf1);
}
/* ensure we can cope with multiple types with the same name in
* distilled base BTF. In this case because sizes are different,
* we can still disambiguate them.
*/
static void test_distilled_base_multi(void)
{
struct btf *btf1 = NULL, *btf2 = NULL, *btf3 = NULL, *btf4 = NULL;
btf1 = btf__new_empty();
if (!ASSERT_OK_PTR(btf1, "empty_main_btf"))
return;
btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [1] int */
btf__add_int(btf1, "int", 8, BTF_INT_SIGNED); /* [2] int */
VALIDATE_RAW_BTF(
btf1,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] INT 'int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED");
btf2 = btf__new_empty_split(btf1);
if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
goto cleanup;
btf__add_ptr(btf2, 1);
btf__add_const(btf2, 2);
VALIDATE_RAW_BTF(
btf2,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] INT 'int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED",
"[3] PTR '(anon)' type_id=1",
"[4] CONST '(anon)' type_id=2");
if (!ASSERT_EQ(0, btf__distill_base(btf2, &btf3, &btf4),
"distilled_base") ||
!ASSERT_OK_PTR(btf3, "distilled_base") ||
!ASSERT_OK_PTR(btf4, "distilled_split") ||
!ASSERT_EQ(3, btf__type_cnt(btf3), "distilled_base_type_cnt"))
goto cleanup;
VALIDATE_RAW_BTF(
btf3,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] INT 'int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED");
if (!ASSERT_EQ(btf__relocate(btf4, btf1), 0, "relocate_split"))
goto cleanup;
VALIDATE_RAW_BTF(
btf4,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] INT 'int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED",
"[3] PTR '(anon)' type_id=1",
"[4] CONST '(anon)' type_id=2");
cleanup:
btf__free(btf4);
btf__free(btf3);
btf__free(btf2);
btf__free(btf1);
}
/* If a needed type is not present in the base BTF we wish to relocate
* with, btf__relocate() should error our.
*/
static void test_distilled_base_missing_err(void)
{
struct btf *btf1 = NULL, *btf2 = NULL, *btf3 = NULL, *btf4 = NULL, *btf5 = NULL;
btf1 = btf__new_empty();
if (!ASSERT_OK_PTR(btf1, "empty_main_btf"))
return;
btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [1] int */
btf__add_int(btf1, "int", 8, BTF_INT_SIGNED); /* [2] int */
VALIDATE_RAW_BTF(
btf1,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] INT 'int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED");
btf2 = btf__new_empty_split(btf1);
if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
goto cleanup;
btf__add_ptr(btf2, 1);
btf__add_const(btf2, 2);
VALIDATE_RAW_BTF(
btf2,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] INT 'int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED",
"[3] PTR '(anon)' type_id=1",
"[4] CONST '(anon)' type_id=2");
if (!ASSERT_EQ(0, btf__distill_base(btf2, &btf3, &btf4),
"distilled_base") ||
!ASSERT_OK_PTR(btf3, "distilled_base") ||
!ASSERT_OK_PTR(btf4, "distilled_split") ||
!ASSERT_EQ(3, btf__type_cnt(btf3), "distilled_base_type_cnt"))
goto cleanup;
VALIDATE_RAW_BTF(
btf3,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] INT 'int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED");
btf5 = btf__new_empty();
if (!ASSERT_OK_PTR(btf5, "empty_reloc_btf"))
return;
btf__add_int(btf5, "int", 4, BTF_INT_SIGNED); /* [1] int */
VALIDATE_RAW_BTF(
btf5,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED");
ASSERT_EQ(btf__relocate(btf4, btf5), -EINVAL, "relocate_split");
cleanup:
btf__free(btf5);
btf__free(btf4);
btf__free(btf3);
btf__free(btf2);
btf__free(btf1);
}
/* With 2 types of same size in distilled base BTF, relocation should
* fail as we have no means to choose between them.
*/
static void test_distilled_base_multi_err(void)
{
struct btf *btf1 = NULL, *btf2 = NULL, *btf3 = NULL, *btf4 = NULL;
btf1 = btf__new_empty();
if (!ASSERT_OK_PTR(btf1, "empty_main_btf"))
return;
btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [1] int */
btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [2] int */
VALIDATE_RAW_BTF(
btf1,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED");
btf2 = btf__new_empty_split(btf1);
if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
goto cleanup;
btf__add_ptr(btf2, 1);
btf__add_const(btf2, 2);
VALIDATE_RAW_BTF(
btf2,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[3] PTR '(anon)' type_id=1",
"[4] CONST '(anon)' type_id=2");
if (!ASSERT_EQ(0, btf__distill_base(btf2, &btf3, &btf4),
"distilled_base") ||
!ASSERT_OK_PTR(btf3, "distilled_base") ||
!ASSERT_OK_PTR(btf4, "distilled_split") ||
!ASSERT_EQ(3, btf__type_cnt(btf3), "distilled_base_type_cnt"))
goto cleanup;
VALIDATE_RAW_BTF(
btf3,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED");
ASSERT_EQ(btf__relocate(btf4, btf1), -EINVAL, "relocate_split");
cleanup:
btf__free(btf4);
btf__free(btf3);
btf__free(btf2);
btf__free(btf1);
}
/* With 2 types of same size in base BTF, relocation should
* fail as we have no means to choose between them.
*/
static void test_distilled_base_multi_err2(void)
{
struct btf *btf1 = NULL, *btf2 = NULL, *btf3 = NULL, *btf4 = NULL, *btf5 = NULL;
btf1 = btf__new_empty();
if (!ASSERT_OK_PTR(btf1, "empty_main_btf"))
return;
btf__add_int(btf1, "int", 4, BTF_INT_SIGNED); /* [1] int */
VALIDATE_RAW_BTF(
btf1,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED");
btf2 = btf__new_empty_split(btf1);
if (!ASSERT_OK_PTR(btf2, "empty_split_btf"))
goto cleanup;
btf__add_ptr(btf2, 1);
VALIDATE_RAW_BTF(
btf2,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] PTR '(anon)' type_id=1");
if (!ASSERT_EQ(0, btf__distill_base(btf2, &btf3, &btf4),
"distilled_base") ||
!ASSERT_OK_PTR(btf3, "distilled_base") ||
!ASSERT_OK_PTR(btf4, "distilled_split") ||
!ASSERT_EQ(2, btf__type_cnt(btf3), "distilled_base_type_cnt"))
goto cleanup;
VALIDATE_RAW_BTF(
btf3,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED");
btf5 = btf__new_empty();
if (!ASSERT_OK_PTR(btf5, "empty_reloc_btf"))
return;
btf__add_int(btf5, "int", 4, BTF_INT_SIGNED); /* [1] int */
btf__add_int(btf5, "int", 4, BTF_INT_SIGNED); /* [2] int */
VALIDATE_RAW_BTF(
btf5,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED");
ASSERT_EQ(btf__relocate(btf4, btf5), -EINVAL, "relocate_split");
cleanup:
btf__free(btf5);
btf__free(btf4);
btf__free(btf3);
btf__free(btf2);
btf__free(btf1);
}
/* create split reference BTF from vmlinux + split BTF with a few type references;
* ensure the resultant split reference BTF is as expected, containing only types
* needed to disambiguate references from split BTF.
*/
static void test_distilled_base_vmlinux(void)
{
struct btf *split_btf = NULL, *vmlinux_btf = btf__load_vmlinux_btf();
struct btf *split_dist = NULL, *base_dist = NULL;
__s32 int_id, myint_id;
if (!ASSERT_OK_PTR(vmlinux_btf, "load_vmlinux"))
return;
int_id = btf__find_by_name_kind(vmlinux_btf, "int", BTF_KIND_INT);
if (!ASSERT_GT(int_id, 0, "find_int"))
goto cleanup;
split_btf = btf__new_empty_split(vmlinux_btf);
if (!ASSERT_OK_PTR(split_btf, "new_split"))
goto cleanup;
myint_id = btf__add_typedef(split_btf, "myint", int_id);
btf__add_ptr(split_btf, myint_id);
if (!ASSERT_EQ(btf__distill_base(split_btf, &base_dist, &split_dist), 0,
"distill_vmlinux_base"))
goto cleanup;
if (!ASSERT_OK_PTR(split_dist, "split_distilled") ||
!ASSERT_OK_PTR(base_dist, "base_dist"))
goto cleanup;
VALIDATE_RAW_BTF(
split_dist,
"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
"[2] TYPEDEF 'myint' type_id=1",
"[3] PTR '(anon)' type_id=2");
cleanup:
btf__free(split_dist);
btf__free(base_dist);
btf__free(split_btf);
btf__free(vmlinux_btf);
}
void test_btf_distill(void)
{
if (test__start_subtest("distilled_base"))
test_distilled_base();
if (test__start_subtest("distilled_base_multi"))
test_distilled_base_multi();
if (test__start_subtest("distilled_base_missing_err"))
test_distilled_base_missing_err();
if (test__start_subtest("distilled_base_multi_err"))
test_distilled_base_multi_err();
if (test__start_subtest("distilled_base_multi_err2"))
test_distilled_base_multi_err2();
if (test__start_subtest("distilled_base_vmlinux"))
test_distilled_base_vmlinux();
}
|
