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

   1 #include "perf.h"
   2 #include "util/util.h"
   3 #include "util/debug.h"
   4 #include "util/parse-options.h"
   5 #include "util/parse-branch-options.h"
   6
   7 #define BRANCH_OPT(n, m) \
   8         { .name = n, .mode = (m) }
   9
  10 #define BRANCH_END { .name = NULL }
  11
  12 struct branch_mode {
  13         const char *name;
  14         int mode;
  15 };
  16
  17 static const struct branch_mode branch_modes[] = {
  18         BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER),
  19         BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL),
  20         BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV),
  21         BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY),
  22         BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL),
  23         BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN),
  24         BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL),
  25         BRANCH_OPT("abort_tx", PERF_SAMPLE_BRANCH_ABORT_TX),
  26         BRANCH_OPT("in_tx", PERF_SAMPLE_BRANCH_IN_TX),
  27         BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NO_TX),
  28         BRANCH_OPT("cond", PERF_SAMPLE_BRANCH_COND),
  29         BRANCH_END
  30 };
  31
  32 int
  33 parse_branch_stack(const struct option *opt, const char *str, int unset)
  34 {
  35 #define ONLY_PLM \
  36         (PERF_SAMPLE_BRANCH_USER        |\
  37          PERF_SAMPLE_BRANCH_KERNEL      |\
  38          PERF_SAMPLE_BRANCH_HV)
  39
  40         uint64_t *mode = (uint64_t *)opt->value;
  41         const struct branch_mode *br;
  42         char *s, *os = NULL, *p;
  43         int ret = -1;
  44
  45         if (unset)
  46                 return 0;
  47
  48         /*
  49          * cannot set it twice, -b + --branch-filter for instance
  50          */
  51         if (*mode)
  52                 return -1;
  53
  54         /* str may be NULL in case no arg is passed to -b */
  55         if (str) {
  56                 /* because str is read-only */
  57                 s = os = strdup(str);
  58                 if (!s)
  59                         return -1;
  60
  61                 for (;;) {
  62                         p = strchr(s, ',');
  63                         if (p)
  64                                 *p = '\0';
  65
  66                         for (br = branch_modes; br->name; br++) {
  67                                 if (!strcasecmp(s, br->name))
  68                                         break;
  69                         }
  70                         if (!br->name) {
  71                                 ui__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         ret = 0;
  85
  86         /* default to any branch */
  87         if ((*mode & ~ONLY_PLM) == 0) {
  88                 *mode = PERF_SAMPLE_BRANCH_ANY;
  89         }
  90 error:
  91         free(os);
  92         return ret;
  93 }