1 // SPDX-License-Identifier: GPL-2.0
9  *  gcc/gcov-io.h
12  *  Uses gcc-internal data definitions.
31 /* Since GCC 12.1 sizes are in BYTES and not in WORDS (4B). */
32 #if (__GNUC__ >= 12)
41  * struct gcov_ctr_info - information about counters for a single function
46  * at run-time with the exception of the values array.
54  * struct gcov_fn_info - profiling meta data per function
62  * at run-time.
67  * comdat functions was selected -- it points to the gcov_info object
79  * struct gcov_info - profiling data per object file
81  * @next: list head for a singly-linked list
90  * at run-time with the exception of the next pointer.
97 #if (__GNUC__ >= 12)
107  * gcov_info_filename - return info filename
112 	return info->filename;  in gcov_info_filename()
116  * gcov_info_version - return info version
121 	return info->version;  in gcov_info_version()
125  * gcov_info_next - return next profiling data set
136 	return info->next;  in gcov_info_next()
140  * gcov_info_link - link/add profiling data set to the list
145 	info->next = gcov_info_head;  in gcov_info_link()
150  * gcov_info_unlink - unlink/remove profiling data set from the list
157 		prev->next = info->next;  in gcov_info_unlink()
159 		gcov_info_head = info->next;  in gcov_info_unlink()
163  * gcov_info_within_module - check if a profiling data set belongs to a module
165  * @mod: module
169 bool gcov_info_within_module(struct gcov_info *info, struct module *mod)  in gcov_info_within_module()  argument
171 	return within_module((unsigned long)info, mod);  in gcov_info_within_module()
181  * Determine whether a counter is active. Doesn't change at run-time.
185 	return info->merge[type] ? 1 : 0;  in counter_active()
202  * gcov_info_reset - reset profiling data to zero
211 	for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {  in gcov_info_reset()
212 		ci_ptr = info->functions[fi_idx]->ctrs;  in gcov_info_reset()
218 			memset(ci_ptr->values, 0,  in gcov_info_reset()
219 					sizeof(gcov_type) * ci_ptr->num);  in gcov_info_reset()
226  * gcov_info_is_compatible - check if profiling data can be added
230  * Returns non-zero if profiling data can be added, zero otherwise.
234 	return (info1->stamp == info2->stamp);  in gcov_info_is_compatible()
238  * gcov_info_add - add up profiling data
252 	for (fi_idx = 0; fi_idx < src->n_functions; fi_idx++) {  in gcov_info_add()
253 		dci_ptr = dst->functions[fi_idx]->ctrs;  in gcov_info_add()
254 		sci_ptr = src->functions[fi_idx]->ctrs;  in gcov_info_add()
260 			for (val_idx = 0; val_idx < sci_ptr->num; val_idx++)  in gcov_info_add()
261 				dci_ptr->values[val_idx] +=  in gcov_info_add()
262 					sci_ptr->values[val_idx];  in gcov_info_add()
271  * gcov_info_dup - duplicate profiling data set
291 	dup->next = NULL;  in gcov_info_dup()
292 	dup->filename = NULL;  in gcov_info_dup()
293 	dup->functions = NULL;  in gcov_info_dup()
295 	dup->filename = kstrdup(info->filename, GFP_KERNEL);  in gcov_info_dup()
296 	if (!dup->filename)  in gcov_info_dup()
299 	dup->functions = kcalloc(info->n_functions,  in gcov_info_dup()
301 	if (!dup->functions)  in gcov_info_dup()
308 	for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {  in gcov_info_dup()
309 		dup->functions[fi_idx] = kzalloc(fi_size, GFP_KERNEL);  in gcov_info_dup()
310 		if (!dup->functions[fi_idx])  in gcov_info_dup()
313 		*(dup->functions[fi_idx]) = *(info->functions[fi_idx]);  in gcov_info_dup()
315 		sci_ptr = info->functions[fi_idx]->ctrs;  in gcov_info_dup()
316 		dci_ptr = dup->functions[fi_idx]->ctrs;  in gcov_info_dup()
320 			cv_size = sizeof(gcov_type) * sci_ptr->num;  in gcov_info_dup()
322 			dci_ptr->values = kvmalloc(cv_size, GFP_KERNEL);  in gcov_info_dup()
324 			if (!dci_ptr->values)  in gcov_info_dup()
327 			dci_ptr->num = sci_ptr->num;  in gcov_info_dup()
328 			memcpy(dci_ptr->values, sci_ptr->values, cv_size);  in gcov_info_dup()
342  * gcov_info_free - release memory for profiling data set duplicate
352 	if (!info->functions)  in gcov_info_free()
357 	for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {  in gcov_info_free()
358 		if (!info->functions[fi_idx])  in gcov_info_free()
361 		ci_ptr = info->functions[fi_idx]->ctrs;  in gcov_info_free()
364 			kvfree(ci_ptr->values);  in gcov_info_free()
366 		kfree(info->functions[fi_idx]);  in gcov_info_free()
370 	kfree(info->functions);  in gcov_info_free()
371 	kfree(info->filename);  in gcov_info_free()
376  * convert_to_gcda - convert profiling data set to gcda file format
393 	pos += store_gcov_u32(buffer, pos, info->version);  in convert_to_gcda()
394 	pos += store_gcov_u32(buffer, pos, info->stamp);  in convert_to_gcda()
396 #if (__GNUC__ >= 12)  in convert_to_gcda()
401 	for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) {  in convert_to_gcda()
402 		fi_ptr = info->functions[fi_idx];  in convert_to_gcda()
408 		pos += store_gcov_u32(buffer, pos, fi_ptr->ident);  in convert_to_gcda()
409 		pos += store_gcov_u32(buffer, pos, fi_ptr->lineno_checksum);  in convert_to_gcda()
410 		pos += store_gcov_u32(buffer, pos, fi_ptr->cfg_checksum);  in convert_to_gcda()
412 		ci_ptr = fi_ptr->ctrs;  in convert_to_gcda()
422 				ci_ptr->num * 2 * GCOV_UNIT_SIZE);  in convert_to_gcda()
424 			for (cv_idx = 0; cv_idx < ci_ptr->num; cv_idx++) {  in convert_to_gcda()
426 						      ci_ptr->values[cv_idx]);  in convert_to_gcda()