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