29  * The disassembly of each program is then compared with the pattern
45 	/* Pattern for BPF_LDX_MEM(field_sz, dst, ctx, field_offset) */
47 	/* Pattern for BPF_STX_MEM(field_sz, ctx, src, field_offset) and
51 	/* Pattern for BPF_ST_MEM(field_sz, ctx, src, field_offset),
55 	/* Pattern for BPF_STX_MEM (field_sz, ctx, src, field_offset),
68 /* Sign extension on s390 changes the pattern */
291 static int find_field_offset(struct btf *btf, char *pattern, regmatch_t *matches)  in find_field_offset()  argument
295 	char *type   = pattern + matches[1].rm_so;  in find_field_offset()
296 	char *field  = pattern + matches[2].rm_so;  in find_field_offset()
302 		PRINT_FAIL("Malformed pattern: type ident is too long: %d\n", type_sz);  in find_field_offset()
307 		PRINT_FAIL("Malformed pattern: field ident is too long: %d\n", field_sz);  in find_field_offset()
384  *   Can't match disassembly(left) with pattern(right):
394 	char *pattern = pattern_origin;  in print_match_error()  local
398 	fprintf(out, "Can't match disassembly(left) with pattern(right):\n");  in print_match_error()
399 	while (*pattern || *text) {  in print_match_error()
423 		/* Print one line from pattern, pattern lines are terminated by ';' */  in print_match_error()
424 		while (*pattern && *pattern != ';') {  in print_match_error()
425 			if (pattern == pattern_pos)  in print_match_error()
427 			fputc(*pattern, out);  in print_match_error()
428 			++pattern;  in print_match_error()
431 		if (pattern == pattern_pos)  in print_match_error()
435 		if (*pattern)  in print_match_error()
436 			++pattern;  in print_match_error()
440 		/* If pattern and text diverge at this line, print an  in print_match_error()
456 /* Test if `text` matches `pattern`. Pattern consists of the following elements:
475  *   If a substring of pattern is equal to `reg_map[i][0]` the `text` is
478  * - Whitespace is ignored, ';' counts as whitespace for `pattern`.
480  * - Any other characters, `pattern` and `text` should match one-to-one.
482  * Example of a pattern:
490 static bool match_pattern(struct btf *btf, char *pattern, char *text, char *reg_map[][2])  in match_pattern()  argument
492 	char *pattern_origin = pattern;  in match_pattern()
497 	while (*pattern) {  in match_pattern()
502 		if (isspace(*pattern) || *pattern == ';') {  in match_pattern()
505 			pattern = skip_space_and_semi(pattern);  in match_pattern()
514 			pattern_next = match_str(pattern, reg_map[i][0]);  in match_pattern()
522 			pattern = pattern_next;  in match_pattern()
530 		if (strncmp(pattern, "$(", 2) == 0) {  in match_pattern()
531 			char *group_start = pattern, *text_next;  in match_pattern()
534 			pattern += 2;  in match_pattern()
539 				pattern = skip_space(pattern);  in match_pattern()
540 				if (!*pattern) {  in match_pattern()
541 					PRINT_FAIL("Unexpected end of pattern\n");  in match_pattern()
545 				if (*pattern == ')') {  in match_pattern()
546 					++pattern;  in match_pattern()
550 				if (*pattern == '+') {  in match_pattern()
551 					++pattern;  in match_pattern()
555 				printf("pattern: %s\n", pattern);  in match_pattern()
556 				if (regexec(field_regex, pattern, 3, matches, 0) != 0) {  in match_pattern()
561 				field_offset = find_field_offset(btf, pattern, matches);  in match_pattern()
565 				pattern += matches[0].rm_eo;  in match_pattern()
572 					   (int)(pattern - group_start),  in match_pattern()
583 		if (regexec(field_regex, pattern, 3, matches, 0) == 0) {  in match_pattern()
587 			field_offset = find_field_offset(btf, pattern, matches);  in match_pattern()
594 					   (int)matches[0].rm_eo, pattern, field_offset);  in match_pattern()
598 			pattern += matches[0].rm_eo;  in match_pattern()
603 		/* If pattern points to identifier not followed by '::'  in match_pattern()
607 		if (regexec(ident_regex, pattern, 1, matches, 0) == 0) {  in match_pattern()
608 			if (strncmp(pattern, text, matches[0].rm_eo) != 0)  in match_pattern()
611 			pattern += matches[0].rm_eo;  in match_pattern()
617 		if (*pattern != *text)  in match_pattern()
620 		++pattern;  in match_pattern()
628 	print_match_error(stdout, pattern_origin, text_origin, pattern, text);  in match_pattern()
642 			  char *pattern,  in match_program()  argument
695 	ASSERT_TRUE(match_pattern(btf, pattern, text, reg_map),  in match_program()
777 			char *pattern = test->write_stx ? test->write_stx : test->write;  in run_one_testcase()  local
782 			match_program(btf, &pinfo, pattern, stx_reg_map, true);  in run_one_testcase()
786 			char *pattern = test->write_st ? test->write_st : test->write;  in run_one_testcase()  local
791 			match_program(btf, &pinfo, pattern, st_reg_map, false);  in run_one_testcase()