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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * This code provides functions to handle gcc's profiling data format
4 * introduced with gcc 4.7.
5 *
6 * This file is based heavily on gcc_3_4.c file.
7 *
8 * For a better understanding, refer to gcc source:
9 * gcc/gcov-io.h
10 * libgcc/libgcov.c
11 *
12 * Uses gcc-internal data definitions.
13 */
14
15#include <linux/errno.h>
16#include <linux/slab.h>
17#include <linux/string.h>
18#include <linux/mm.h>
19#include "gcov.h"
20
21#if (__GNUC__ >= 14)
22#define GCOV_COUNTERS 9
23#elif (__GNUC__ >= 10)
24#define GCOV_COUNTERS 8
25#elif (__GNUC__ >= 7)
26#define GCOV_COUNTERS 9
27#elif (__GNUC__ > 5) || (__GNUC__ == 5 && __GNUC_MINOR__ >= 1)
28#define GCOV_COUNTERS 10
29#else
30#define GCOV_COUNTERS 9
31#endif
32
33#define GCOV_TAG_FUNCTION_LENGTH 3
34
35/* Since GCC 12.1 sizes are in BYTES and not in WORDS (4B). */
36#if (__GNUC__ >= 12)
37#define GCOV_UNIT_SIZE 4
38#else
39#define GCOV_UNIT_SIZE 1
40#endif
41
42static struct gcov_info *gcov_info_head;
43
44/**
45 * struct gcov_ctr_info - information about counters for a single function
46 * @num: number of counter values for this type
47 * @values: array of counter values for this type
48 *
49 * This data is generated by gcc during compilation and doesn't change
50 * at run-time with the exception of the values array.
51 */
52struct gcov_ctr_info {
53 unsigned int num;
54 gcov_type *values;
55};
56
57/**
58 * struct gcov_fn_info - profiling meta data per function
59 * @key: comdat key
60 * @ident: unique ident of function
61 * @lineno_checksum: function lineo_checksum
62 * @cfg_checksum: function cfg checksum
63 * @ctrs: instrumented counters
64 *
65 * This data is generated by gcc during compilation and doesn't change
66 * at run-time.
67 *
68 * Information about a single function. This uses the trailing array
69 * idiom. The number of counters is determined from the merge pointer
70 * array in gcov_info. The key is used to detect which of a set of
71 * comdat functions was selected -- it points to the gcov_info object
72 * of the object file containing the selected comdat function.
73 */
74struct gcov_fn_info {
75 const struct gcov_info *key;
76 unsigned int ident;
77 unsigned int lineno_checksum;
78 unsigned int cfg_checksum;
79 struct gcov_ctr_info ctrs[];
80};
81
82/**
83 * struct gcov_info - profiling data per object file
84 * @version: gcov version magic indicating the gcc version used for compilation
85 * @next: list head for a singly-linked list
86 * @stamp: uniquifying time stamp
87 * @checksum: unique object checksum
88 * @filename: name of the associated gcov data file
89 * @merge: merge functions (null for unused counter type)
90 * @n_functions: number of instrumented functions
91 * @functions: pointer to pointers to function information
92 *
93 * This data is generated by gcc during compilation and doesn't change
94 * at run-time with the exception of the next pointer.
95 */
96struct gcov_info {
97 unsigned int version;
98 struct gcov_info *next;
99 unsigned int stamp;
100 /* Since GCC 12.1 a checksum field is added. */
101#if (__GNUC__ >= 12)
102 unsigned int checksum;
103#endif
104 const char *filename;
105 void (*merge[GCOV_COUNTERS])(gcov_type *, unsigned int);
106 unsigned int n_functions;
107 struct gcov_fn_info **functions;
108};
109
110/**
111 * gcov_info_filename - return info filename
112 * @info: profiling data set
113 */
114const char *gcov_info_filename(struct gcov_info *info)
115{
116 return info->filename;
117}
118
119/**
120 * gcov_info_version - return info version
121 * @info: profiling data set
122 */
123unsigned int gcov_info_version(struct gcov_info *info)
124{
125 return info->version;
126}
127
128/**
129 * gcov_info_next - return next profiling data set
130 * @info: profiling data set
131 *
132 * Returns next gcov_info following @info or first gcov_info in the chain if
133 * @info is %NULL.
134 */
135struct gcov_info *gcov_info_next(struct gcov_info *info)
136{
137 if (!info)
138 return gcov_info_head;
139
140 return info->next;
141}
142
143/**
144 * gcov_info_link - link/add profiling data set to the list
145 * @info: profiling data set
146 */
147void gcov_info_link(struct gcov_info *info)
148{
149 info->next = gcov_info_head;
150 gcov_info_head = info;
151}
152
153/**
154 * gcov_info_unlink - unlink/remove profiling data set from the list
155 * @prev: previous profiling data set
156 * @info: profiling data set
157 */
158void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info)
159{
160 if (prev)
161 prev->next = info->next;
162 else
163 gcov_info_head = info->next;
164}
165
166/**
167 * gcov_info_within_module - check if a profiling data set belongs to a module
168 * @info: profiling data set
169 * @mod: module
170 *
171 * Returns true if profiling data belongs module, false otherwise.
172 */
173bool gcov_info_within_module(struct gcov_info *info, struct module *mod)
174{
175 return within_module((unsigned long)info, mod);
176}
177
178/* Symbolic links to be created for each profiling data file. */
179const struct gcov_link gcov_link[] = {
180 { OBJ_TREE, "gcno" }, /* Link to .gcno file in $(objtree). */
181 { 0, NULL},
182};
183
184/*
185 * Determine whether a counter is active. Doesn't change at run-time.
186 */
187static int counter_active(struct gcov_info *info, unsigned int type)
188{
189 return info->merge[type] ? 1 : 0;
190}
191
192/* Determine number of active counters. Based on gcc magic. */
193static unsigned int num_counter_active(struct gcov_info *info)
194{
195 unsigned int i;
196 unsigned int result = 0;
197
198 for (i = 0; i < GCOV_COUNTERS; i++) {
199 if (counter_active(info, i))
200 result++;
201 }
202 return result;
203}
204
205/**
206 * gcov_info_reset - reset profiling data to zero
207 * @info: profiling data set
208 */
209void gcov_info_reset(struct gcov_info *info)
210{
211 struct gcov_ctr_info *ci_ptr;
212 unsigned int fi_idx;
213 unsigned int ct_idx;
214
215 for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
216 ci_ptr = info->functions[fi_idx]->ctrs;
217
218 for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
219 if (!counter_active(info, ct_idx))
220 continue;
221
222 memset(ci_ptr->values, 0,
223 sizeof(gcov_type) * ci_ptr->num);
224 ci_ptr++;
225 }
226 }
227}
228
229/**
230 * gcov_info_is_compatible - check if profiling data can be added
231 * @info1: first profiling data set
232 * @info2: second profiling data set
233 *
234 * Returns non-zero if profiling data can be added, zero otherwise.
235 */
236int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2)
237{
238 return (info1->stamp == info2->stamp);
239}
240
241/**
242 * gcov_info_add - add up profiling data
243 * @dst: profiling data set to which data is added
244 * @src: profiling data set which is added
245 *
246 * Adds profiling counts of @src to @dst.
247 */
248void gcov_info_add(struct gcov_info *dst, struct gcov_info *src)
249{
250 struct gcov_ctr_info *dci_ptr;
251 struct gcov_ctr_info *sci_ptr;
252 unsigned int fi_idx;
253 unsigned int ct_idx;
254 unsigned int val_idx;
255
256 for (fi_idx = 0; fi_idx < src->n_functions; fi_idx++) {
257 dci_ptr = dst->functions[fi_idx]->ctrs;
258 sci_ptr = src->functions[fi_idx]->ctrs;
259
260 for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
261 if (!counter_active(src, ct_idx))
262 continue;
263
264 for (val_idx = 0; val_idx < sci_ptr->num; val_idx++)
265 dci_ptr->values[val_idx] +=
266 sci_ptr->values[val_idx];
267
268 dci_ptr++;
269 sci_ptr++;
270 }
271 }
272}
273
274/**
275 * gcov_info_dup - duplicate profiling data set
276 * @info: profiling data set to duplicate
277 *
278 * Return newly allocated duplicate on success, %NULL on error.
279 */
280struct gcov_info *gcov_info_dup(struct gcov_info *info)
281{
282 struct gcov_info *dup;
283 struct gcov_ctr_info *dci_ptr; /* dst counter info */
284 struct gcov_ctr_info *sci_ptr; /* src counter info */
285 unsigned int active;
286 unsigned int fi_idx; /* function info idx */
287 unsigned int ct_idx; /* counter type idx */
288 size_t fi_size; /* function info size */
289 size_t cv_size; /* counter values size */
290
291 dup = kmemdup(info, sizeof(*dup), GFP_KERNEL);
292 if (!dup)
293 return NULL;
294
295 dup->next = NULL;
296 dup->filename = NULL;
297 dup->functions = NULL;
298
299 dup->filename = kstrdup(info->filename, GFP_KERNEL);
300 if (!dup->filename)
301 goto err_free;
302
303 dup->functions = kcalloc(info->n_functions,
304 sizeof(struct gcov_fn_info *), GFP_KERNEL);
305 if (!dup->functions)
306 goto err_free;
307
308 active = num_counter_active(info);
309 fi_size = sizeof(struct gcov_fn_info);
310 fi_size += sizeof(struct gcov_ctr_info) * active;
311
312 for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
313 dup->functions[fi_idx] = kzalloc(fi_size, GFP_KERNEL);
314 if (!dup->functions[fi_idx])
315 goto err_free;
316
317 *(dup->functions[fi_idx]) = *(info->functions[fi_idx]);
318
319 sci_ptr = info->functions[fi_idx]->ctrs;
320 dci_ptr = dup->functions[fi_idx]->ctrs;
321
322 for (ct_idx = 0; ct_idx < active; ct_idx++) {
323
324 cv_size = sizeof(gcov_type) * sci_ptr->num;
325
326 dci_ptr->values = kvmalloc(cv_size, GFP_KERNEL);
327
328 if (!dci_ptr->values)
329 goto err_free;
330
331 dci_ptr->num = sci_ptr->num;
332 memcpy(dci_ptr->values, sci_ptr->values, cv_size);
333
334 sci_ptr++;
335 dci_ptr++;
336 }
337 }
338
339 return dup;
340err_free:
341 gcov_info_free(dup);
342 return NULL;
343}
344
345/**
346 * gcov_info_free - release memory for profiling data set duplicate
347 * @info: profiling data set duplicate to free
348 */
349void gcov_info_free(struct gcov_info *info)
350{
351 unsigned int active;
352 unsigned int fi_idx;
353 unsigned int ct_idx;
354 struct gcov_ctr_info *ci_ptr;
355
356 if (!info->functions)
357 goto free_info;
358
359 active = num_counter_active(info);
360
361 for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
362 if (!info->functions[fi_idx])
363 continue;
364
365 ci_ptr = info->functions[fi_idx]->ctrs;
366
367 for (ct_idx = 0; ct_idx < active; ct_idx++, ci_ptr++)
368 kvfree(ci_ptr->values);
369
370 kfree(info->functions[fi_idx]);
371 }
372
373free_info:
374 kfree(info->functions);
375 kfree(info->filename);
376 kfree(info);
377}
378
379/**
380 * convert_to_gcda - convert profiling data set to gcda file format
381 * @buffer: the buffer to store file data or %NULL if no data should be stored
382 * @info: profiling data set to be converted
383 *
384 * Returns the number of bytes that were/would have been stored into the buffer.
385 */
386size_t convert_to_gcda(char *buffer, struct gcov_info *info)
387{
388 struct gcov_fn_info *fi_ptr;
389 struct gcov_ctr_info *ci_ptr;
390 unsigned int fi_idx;
391 unsigned int ct_idx;
392 unsigned int cv_idx;
393 size_t pos = 0;
394
395 /* File header. */
396 pos += store_gcov_u32(buffer, pos, GCOV_DATA_MAGIC);
397 pos += store_gcov_u32(buffer, pos, info->version);
398 pos += store_gcov_u32(buffer, pos, info->stamp);
399
400#if (__GNUC__ >= 12)
401 /* Use zero as checksum of the compilation unit. */
402 pos += store_gcov_u32(buffer, pos, 0);
403#endif
404
405 for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
406 fi_ptr = info->functions[fi_idx];
407
408 /* Function record. */
409 pos += store_gcov_u32(buffer, pos, GCOV_TAG_FUNCTION);
410 pos += store_gcov_u32(buffer, pos,
411 GCOV_TAG_FUNCTION_LENGTH * GCOV_UNIT_SIZE);
412 pos += store_gcov_u32(buffer, pos, fi_ptr->ident);
413 pos += store_gcov_u32(buffer, pos, fi_ptr->lineno_checksum);
414 pos += store_gcov_u32(buffer, pos, fi_ptr->cfg_checksum);
415
416 ci_ptr = fi_ptr->ctrs;
417
418 for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
419 if (!counter_active(info, ct_idx))
420 continue;
421
422 /* Counter record. */
423 pos += store_gcov_u32(buffer, pos,
424 GCOV_TAG_FOR_COUNTER(ct_idx));
425 pos += store_gcov_u32(buffer, pos,
426 ci_ptr->num * 2 * GCOV_UNIT_SIZE);
427
428 for (cv_idx = 0; cv_idx < ci_ptr->num; cv_idx++) {
429 pos += store_gcov_u64(buffer, pos,
430 ci_ptr->values[cv_idx]);
431 }
432
433 ci_ptr++;
434 }
435 }
436
437 return pos;
438}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * This code provides functions to handle gcc's profiling data format
4 * introduced with gcc 4.7.
5 *
6 * This file is based heavily on gcc_3_4.c file.
7 *
8 * For a better understanding, refer to gcc source:
9 * gcc/gcov-io.h
10 * libgcc/libgcov.c
11 *
12 * Uses gcc-internal data definitions.
13 */
14
15#include <linux/errno.h>
16#include <linux/slab.h>
17#include <linux/string.h>
18#include <linux/mm.h>
19#include "gcov.h"
20
21#if (__GNUC__ >= 10)
22#define GCOV_COUNTERS 8
23#elif (__GNUC__ >= 7)
24#define GCOV_COUNTERS 9
25#elif (__GNUC__ > 5) || (__GNUC__ == 5 && __GNUC_MINOR__ >= 1)
26#define GCOV_COUNTERS 10
27#else
28#define GCOV_COUNTERS 9
29#endif
30
31#define GCOV_TAG_FUNCTION_LENGTH 3
32
33static struct gcov_info *gcov_info_head;
34
35/**
36 * struct gcov_ctr_info - information about counters for a single function
37 * @num: number of counter values for this type
38 * @values: array of counter values for this type
39 *
40 * This data is generated by gcc during compilation and doesn't change
41 * at run-time with the exception of the values array.
42 */
43struct gcov_ctr_info {
44 unsigned int num;
45 gcov_type *values;
46};
47
48/**
49 * struct gcov_fn_info - profiling meta data per function
50 * @key: comdat key
51 * @ident: unique ident of function
52 * @lineno_checksum: function lineo_checksum
53 * @cfg_checksum: function cfg checksum
54 * @ctrs: instrumented counters
55 *
56 * This data is generated by gcc during compilation and doesn't change
57 * at run-time.
58 *
59 * Information about a single function. This uses the trailing array
60 * idiom. The number of counters is determined from the merge pointer
61 * array in gcov_info. The key is used to detect which of a set of
62 * comdat functions was selected -- it points to the gcov_info object
63 * of the object file containing the selected comdat function.
64 */
65struct gcov_fn_info {
66 const struct gcov_info *key;
67 unsigned int ident;
68 unsigned int lineno_checksum;
69 unsigned int cfg_checksum;
70 struct gcov_ctr_info ctrs[];
71};
72
73/**
74 * struct gcov_info - profiling data per object file
75 * @version: gcov version magic indicating the gcc version used for compilation
76 * @next: list head for a singly-linked list
77 * @stamp: uniquifying time stamp
78 * @filename: name of the associated gcov data file
79 * @merge: merge functions (null for unused counter type)
80 * @n_functions: number of instrumented functions
81 * @functions: pointer to pointers to function information
82 *
83 * This data is generated by gcc during compilation and doesn't change
84 * at run-time with the exception of the next pointer.
85 */
86struct gcov_info {
87 unsigned int version;
88 struct gcov_info *next;
89 unsigned int stamp;
90 const char *filename;
91 void (*merge[GCOV_COUNTERS])(gcov_type *, unsigned int);
92 unsigned int n_functions;
93 struct gcov_fn_info **functions;
94};
95
96/**
97 * gcov_info_filename - return info filename
98 * @info: profiling data set
99 */
100const char *gcov_info_filename(struct gcov_info *info)
101{
102 return info->filename;
103}
104
105/**
106 * gcov_info_version - return info version
107 * @info: profiling data set
108 */
109unsigned int gcov_info_version(struct gcov_info *info)
110{
111 return info->version;
112}
113
114/**
115 * gcov_info_next - return next profiling data set
116 * @info: profiling data set
117 *
118 * Returns next gcov_info following @info or first gcov_info in the chain if
119 * @info is %NULL.
120 */
121struct gcov_info *gcov_info_next(struct gcov_info *info)
122{
123 if (!info)
124 return gcov_info_head;
125
126 return info->next;
127}
128
129/**
130 * gcov_info_link - link/add profiling data set to the list
131 * @info: profiling data set
132 */
133void gcov_info_link(struct gcov_info *info)
134{
135 info->next = gcov_info_head;
136 gcov_info_head = info;
137}
138
139/**
140 * gcov_info_unlink - unlink/remove profiling data set from the list
141 * @prev: previous profiling data set
142 * @info: profiling data set
143 */
144void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info)
145{
146 if (prev)
147 prev->next = info->next;
148 else
149 gcov_info_head = info->next;
150}
151
152/**
153 * gcov_info_within_module - check if a profiling data set belongs to a module
154 * @info: profiling data set
155 * @mod: module
156 *
157 * Returns true if profiling data belongs module, false otherwise.
158 */
159bool gcov_info_within_module(struct gcov_info *info, struct module *mod)
160{
161 return within_module((unsigned long)info, mod);
162}
163
164/* Symbolic links to be created for each profiling data file. */
165const struct gcov_link gcov_link[] = {
166 { OBJ_TREE, "gcno" }, /* Link to .gcno file in $(objtree). */
167 { 0, NULL},
168};
169
170/*
171 * Determine whether a counter is active. Doesn't change at run-time.
172 */
173static int counter_active(struct gcov_info *info, unsigned int type)
174{
175 return info->merge[type] ? 1 : 0;
176}
177
178/* Determine number of active counters. Based on gcc magic. */
179static unsigned int num_counter_active(struct gcov_info *info)
180{
181 unsigned int i;
182 unsigned int result = 0;
183
184 for (i = 0; i < GCOV_COUNTERS; i++) {
185 if (counter_active(info, i))
186 result++;
187 }
188 return result;
189}
190
191/**
192 * gcov_info_reset - reset profiling data to zero
193 * @info: profiling data set
194 */
195void gcov_info_reset(struct gcov_info *info)
196{
197 struct gcov_ctr_info *ci_ptr;
198 unsigned int fi_idx;
199 unsigned int ct_idx;
200
201 for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
202 ci_ptr = info->functions[fi_idx]->ctrs;
203
204 for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
205 if (!counter_active(info, ct_idx))
206 continue;
207
208 memset(ci_ptr->values, 0,
209 sizeof(gcov_type) * ci_ptr->num);
210 ci_ptr++;
211 }
212 }
213}
214
215/**
216 * gcov_info_is_compatible - check if profiling data can be added
217 * @info1: first profiling data set
218 * @info2: second profiling data set
219 *
220 * Returns non-zero if profiling data can be added, zero otherwise.
221 */
222int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2)
223{
224 return (info1->stamp == info2->stamp);
225}
226
227/**
228 * gcov_info_add - add up profiling data
229 * @dst: profiling data set to which data is added
230 * @src: profiling data set which is added
231 *
232 * Adds profiling counts of @src to @dst.
233 */
234void gcov_info_add(struct gcov_info *dst, struct gcov_info *src)
235{
236 struct gcov_ctr_info *dci_ptr;
237 struct gcov_ctr_info *sci_ptr;
238 unsigned int fi_idx;
239 unsigned int ct_idx;
240 unsigned int val_idx;
241
242 for (fi_idx = 0; fi_idx < src->n_functions; fi_idx++) {
243 dci_ptr = dst->functions[fi_idx]->ctrs;
244 sci_ptr = src->functions[fi_idx]->ctrs;
245
246 for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
247 if (!counter_active(src, ct_idx))
248 continue;
249
250 for (val_idx = 0; val_idx < sci_ptr->num; val_idx++)
251 dci_ptr->values[val_idx] +=
252 sci_ptr->values[val_idx];
253
254 dci_ptr++;
255 sci_ptr++;
256 }
257 }
258}
259
260/**
261 * gcov_info_dup - duplicate profiling data set
262 * @info: profiling data set to duplicate
263 *
264 * Return newly allocated duplicate on success, %NULL on error.
265 */
266struct gcov_info *gcov_info_dup(struct gcov_info *info)
267{
268 struct gcov_info *dup;
269 struct gcov_ctr_info *dci_ptr; /* dst counter info */
270 struct gcov_ctr_info *sci_ptr; /* src counter info */
271 unsigned int active;
272 unsigned int fi_idx; /* function info idx */
273 unsigned int ct_idx; /* counter type idx */
274 size_t fi_size; /* function info size */
275 size_t cv_size; /* counter values size */
276
277 dup = kmemdup(info, sizeof(*dup), GFP_KERNEL);
278 if (!dup)
279 return NULL;
280
281 dup->next = NULL;
282 dup->filename = NULL;
283 dup->functions = NULL;
284
285 dup->filename = kstrdup(info->filename, GFP_KERNEL);
286 if (!dup->filename)
287 goto err_free;
288
289 dup->functions = kcalloc(info->n_functions,
290 sizeof(struct gcov_fn_info *), GFP_KERNEL);
291 if (!dup->functions)
292 goto err_free;
293
294 active = num_counter_active(info);
295 fi_size = sizeof(struct gcov_fn_info);
296 fi_size += sizeof(struct gcov_ctr_info) * active;
297
298 for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
299 dup->functions[fi_idx] = kzalloc(fi_size, GFP_KERNEL);
300 if (!dup->functions[fi_idx])
301 goto err_free;
302
303 *(dup->functions[fi_idx]) = *(info->functions[fi_idx]);
304
305 sci_ptr = info->functions[fi_idx]->ctrs;
306 dci_ptr = dup->functions[fi_idx]->ctrs;
307
308 for (ct_idx = 0; ct_idx < active; ct_idx++) {
309
310 cv_size = sizeof(gcov_type) * sci_ptr->num;
311
312 dci_ptr->values = kvmalloc(cv_size, GFP_KERNEL);
313
314 if (!dci_ptr->values)
315 goto err_free;
316
317 dci_ptr->num = sci_ptr->num;
318 memcpy(dci_ptr->values, sci_ptr->values, cv_size);
319
320 sci_ptr++;
321 dci_ptr++;
322 }
323 }
324
325 return dup;
326err_free:
327 gcov_info_free(dup);
328 return NULL;
329}
330
331/**
332 * gcov_info_free - release memory for profiling data set duplicate
333 * @info: profiling data set duplicate to free
334 */
335void gcov_info_free(struct gcov_info *info)
336{
337 unsigned int active;
338 unsigned int fi_idx;
339 unsigned int ct_idx;
340 struct gcov_ctr_info *ci_ptr;
341
342 if (!info->functions)
343 goto free_info;
344
345 active = num_counter_active(info);
346
347 for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
348 if (!info->functions[fi_idx])
349 continue;
350
351 ci_ptr = info->functions[fi_idx]->ctrs;
352
353 for (ct_idx = 0; ct_idx < active; ct_idx++, ci_ptr++)
354 kvfree(ci_ptr->values);
355
356 kfree(info->functions[fi_idx]);
357 }
358
359free_info:
360 kfree(info->functions);
361 kfree(info->filename);
362 kfree(info);
363}
364
365/**
366 * convert_to_gcda - convert profiling data set to gcda file format
367 * @buffer: the buffer to store file data or %NULL if no data should be stored
368 * @info: profiling data set to be converted
369 *
370 * Returns the number of bytes that were/would have been stored into the buffer.
371 */
372size_t convert_to_gcda(char *buffer, struct gcov_info *info)
373{
374 struct gcov_fn_info *fi_ptr;
375 struct gcov_ctr_info *ci_ptr;
376 unsigned int fi_idx;
377 unsigned int ct_idx;
378 unsigned int cv_idx;
379 size_t pos = 0;
380
381 /* File header. */
382 pos += store_gcov_u32(buffer, pos, GCOV_DATA_MAGIC);
383 pos += store_gcov_u32(buffer, pos, info->version);
384 pos += store_gcov_u32(buffer, pos, info->stamp);
385
386 for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {
387 fi_ptr = info->functions[fi_idx];
388
389 /* Function record. */
390 pos += store_gcov_u32(buffer, pos, GCOV_TAG_FUNCTION);
391 pos += store_gcov_u32(buffer, pos, GCOV_TAG_FUNCTION_LENGTH);
392 pos += store_gcov_u32(buffer, pos, fi_ptr->ident);
393 pos += store_gcov_u32(buffer, pos, fi_ptr->lineno_checksum);
394 pos += store_gcov_u32(buffer, pos, fi_ptr->cfg_checksum);
395
396 ci_ptr = fi_ptr->ctrs;
397
398 for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) {
399 if (!counter_active(info, ct_idx))
400 continue;
401
402 /* Counter record. */
403 pos += store_gcov_u32(buffer, pos,
404 GCOV_TAG_FOR_COUNTER(ct_idx));
405 pos += store_gcov_u32(buffer, pos, ci_ptr->num * 2);
406
407 for (cv_idx = 0; cv_idx < ci_ptr->num; cv_idx++) {
408 pos += store_gcov_u64(buffer, pos,
409 ci_ptr->values[cv_idx]);
410 }
411
412 ci_ptr++;
413 }
414 }
415
416 return pos;
417}