perf/util/parse-branch-options.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include "util/debug.h"
0003 #include "util/event.h"
0004 #include <subcmd/parse-options.h>
0005 #include "util/parse-branch-options.h"
0006 #include <stdlib.h>
0007 #include <string.h>
0008
0009 #define BRANCH_OPT(n, m) \
0010     { .name = n, .mode = (m) }
0011
0012 #define BRANCH_END { .name = NULL }
0013
0014 struct branch_mode {
0015     const char *name;
0016     int mode;
0017 };
0018
0019 static const struct branch_mode branch_modes[] = {
0020     BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER),
0021     BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL),
0022     BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV),
0023     BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY),
0024     BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL),
0025     BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN),
0026     BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL),
0027     BRANCH_OPT("abort_tx", PERF_SAMPLE_BRANCH_ABORT_TX),
0028     BRANCH_OPT("in_tx", PERF_SAMPLE_BRANCH_IN_TX),
0029     BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NO_TX),
0030     BRANCH_OPT("cond", PERF_SAMPLE_BRANCH_COND),
0031     BRANCH_OPT("ind_jmp", PERF_SAMPLE_BRANCH_IND_JUMP),
0032     BRANCH_OPT("call", PERF_SAMPLE_BRANCH_CALL),
0033     BRANCH_OPT("save_type", PERF_SAMPLE_BRANCH_TYPE_SAVE),
0034     BRANCH_OPT("stack", PERF_SAMPLE_BRANCH_CALL_STACK),
0035     BRANCH_END
0036 };
0037
0038 int parse_branch_str(const char *str, __u64 *mode)
0039 {
0040 #define ONLY_PLM \
0041     (PERF_SAMPLE_BRANCH_USER    |\
0042      PERF_SAMPLE_BRANCH_KERNEL  |\
0043      PERF_SAMPLE_BRANCH_HV)
0044
0045     int ret = 0;
0046     char *p, *s;
0047     char *os = NULL;
0048     const struct branch_mode *br;
0049
0050     if (str == NULL) {
0051         *mode = PERF_SAMPLE_BRANCH_ANY;
0052         return 0;
0053     }
0054
0055     /* because str is read-only */
0056     s = os = strdup(str);
0057     if (!s)
0058         return -1;
0059
0060     for (;;) {
0061         p = strchr(s, ',');
0062         if (p)
0063             *p = '\0';
0064
0065         for (br = branch_modes; br->name; br++) {
0066             if (!strcasecmp(s, br->name))
0067                 break;
0068         }
0069         if (!br->name) {
0070             ret = -1;
0071             pr_warning("unknown branch filter %s,"
0072                     " check man page\n", s);
0073             goto error;
0074         }
0075
0076         *mode |= br->mode;
0077
0078         if (!p)
0079             break;
0080
0081         s = p + 1;
0082     }
0083
0084     /* default to any branch */
0085     if ((*mode & ~ONLY_PLM) == 0) {
0086         *mode = PERF_SAMPLE_BRANCH_ANY;
0087     }
0088 error:
0089     free(os);
0090     return ret;
0091 }
0092
0093 int
0094 parse_branch_stack(const struct option *opt, const char *str, int unset)
0095 {
0096     __u64 *mode = (__u64 *)opt->value;
0097
0098     if (unset)
0099         return 0;
0100
0101     /*
0102      * cannot set it twice, -b + --branch-filter for instance
0103      */
0104     if (*mode)
0105         return -1;
0106
0107     return parse_branch_str(str, mode);
0108 }