tools/perf/util/parse-branch-options.c

   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
  13 struct branch_mode {
  14         const char *name;
  15         int mode;
  16 };
  17
  18 static 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
  36 int 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         }
  86 error:
  87         free(os);
  88         return ret;
  89 }
  90
  91 int
  92 parse_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 }