1 // SPDX-License-Identifier: GPL-2.0
2 #include "util/debug.h"
3 #include "util/event.h"
4 #include <subcmd/parse-options.h>
5 #include "util/parse-branch-options.h"
6 #include <stdlib.h>
7 #include <string.h>
8 
9 #define BRANCH_OPT(n, m) \
10 	{ .name = n, .mode = (m) }
11 
12 #define BRANCH_END { .name = NULL }
13 
14 struct branch_mode {
15 	const char *name;
16 	int mode;
17 };
18 
19 static const struct branch_mode branch_modes[] = {
20 	BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER),
21 	BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL),
22 	BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV),
23 	BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY),
24 	BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL),
25 	BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN),
26 	BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL),
27 	BRANCH_OPT("abort_tx", PERF_SAMPLE_BRANCH_ABORT_TX),
28 	BRANCH_OPT("in_tx", PERF_SAMPLE_BRANCH_IN_TX),
29 	BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NO_TX),
30 	BRANCH_OPT("cond", PERF_SAMPLE_BRANCH_COND),
31 	BRANCH_OPT("ind_jmp", PERF_SAMPLE_BRANCH_IND_JUMP),
32 	BRANCH_OPT("call", PERF_SAMPLE_BRANCH_CALL),
33 	BRANCH_OPT("save_type", PERF_SAMPLE_BRANCH_TYPE_SAVE),
34 	BRANCH_OPT("stack", PERF_SAMPLE_BRANCH_CALL_STACK),
35 	BRANCH_END
36 };
37 
38 int parse_branch_str(const char *str, __u64 *mode)
39 {
40 #define ONLY_PLM \
41 	(PERF_SAMPLE_BRANCH_USER	|\
42 	 PERF_SAMPLE_BRANCH_KERNEL	|\
43 	 PERF_SAMPLE_BRANCH_HV)
44 
45 	int ret = 0;
46 	char *p, *s;
47 	char *os = NULL;
48 	const struct branch_mode *br;
49 
50 	if (str == NULL) {
51 		*mode = PERF_SAMPLE_BRANCH_ANY;
52 		return 0;
53 	}
54 
55 	/* because str is read-only */
56 	s = os = strdup(str);
57 	if (!s)
58 		return -1;
59 
60 	for (;;) {
61 		p = strchr(s, ',');
62 		if (p)
63 			*p = '\0';
64 
65 		for (br = branch_modes; br->name; br++) {
66 			if (!strcasecmp(s, br->name))
67 				break;
68 		}
69 		if (!br->name) {
70 			ret = -1;
71 			pr_warning("unknown branch filter %s,"
72 				    " check man page\n", s);
73 			goto error;
74 		}
75 
76 		*mode |= br->mode;
77 
78 		if (!p)
79 			break;
80 
81 		s = p + 1;
82 	}
83 
84 	/* default to any branch */
85 	if ((*mode & ~ONLY_PLM) == 0) {
86 		*mode = PERF_SAMPLE_BRANCH_ANY;
87 	}
88 error:
89 	free(os);
90 	return ret;
91 }
92 
93 int
94 parse_branch_stack(const struct option *opt, const char *str, int unset)
95 {
96 	__u64 *mode = (__u64 *)opt->value;
97 
98 	if (unset)
99 		return 0;
100 
101 	/*
102 	 * cannot set it twice, -b + --branch-filter for instance
103 	 */
104 	if (*mode)
105 		return -1;
106 
107 	return parse_branch_str(str, mode);
108 }
109