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_OPT("ind_jmp", PERF_SAMPLE_BRANCH_IND_JUMP),
  30         BRANCH_END
  31 };
  32
  33 int
  34 parse_branch_stack(const struct option *opt, const char *str, int unset)
  35 {
  36 #define ONLY_PLM \
  37         (PERF_SAMPLE_BRANCH_USER        |\
  38          PERF_SAMPLE_BRANCH_KERNEL      |\
  39          PERF_SAMPLE_BRANCH_HV)
  40
  41         uint64_t *mode = (uint64_t *)opt->value;
  42         const struct branch_mode *br;
  43         char *s, *os = NULL, *p;
  44         int ret = -1;
  45
  46         if (unset)
  47                 return 0;
  48
  49         /*
  50          * cannot set it twice, -b + --branch-filter for instance
  51          */
  52         if (*mode)
  53                 return -1;
  54
  55         /* str may be NULL in case no arg is passed to -b */
  56         if (str) {
  57                 /* because str is read-only */
  58                 s = os = strdup(str);
  59                 if (!s)
  60                         return -1;
  61
  62                 for (;;) {
  63                         p = strchr(s, ',');
  64                         if (p)
  65                                 *p = '\0';
  66
  67                         for (br = branch_modes; br->name; br++) {
  68                                 if (!strcasecmp(s, br->name))
  69                                         break;
  70                         }
  71                         if (!br->name) {
  72                                 ui__warning("unknown branch filter %s,"
  73                                             " check man page\n", s);
  74                                 goto error;
  75                         }
  76
  77                         *mode |= br->mode;
  78
  79                         if (!p)
  80                                 break;
  81
  82                         s = p + 1;
  83                 }
  84         }
  85         ret = 0;
  86
  87         /* default to any branch */
  88         if ((*mode & ~ONLY_PLM) == 0) {
  89                 *mode = PERF_SAMPLE_BRANCH_ANY;
  90         }
  91 error:
  92         free(os);
  93         return ret;
  94 }