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

   1 #include "perf.h"
   2 #include "util/util.h"
   3 #include "util/debug.h"
   4 #include <subcmd/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_OPT("call", PERF_SAMPLE_BRANCH_CALL),
  31         BRANCH_END
  32 };
  33
  34 int parse_branch_str(const char *str, __u64 *mode)
  35 {
  36 #define ONLY_PLM \
  37         (PERF_SAMPLE_BRANCH_USER        |\
  38          PERF_SAMPLE_BRANCH_KERNEL      |\
  39          PERF_SAMPLE_BRANCH_HV)
  40
  41         int ret = 0;
  42         char *p, *s;
  43         char *os = NULL;
  44         const struct branch_mode *br;
  45
  46         if (str == NULL) {
  47                 *mode = PERF_SAMPLE_BRANCH_ANY;
  48                 return 0;
  49         }
  50
  51         /* because str is read-only */
  52         s = os = strdup(str);
  53         if (!s)
  54                 return -1;
  55
  56         for (;;) {
  57                 p = strchr(s, ',');
  58                 if (p)
  59                         *p = '\0';
  60
  61                 for (br = branch_modes; br->name; br++) {
  62                         if (!strcasecmp(s, br->name))
  63                                 break;
  64                 }
  65                 if (!br->name) {
  66                         ret = -1;
  67                         pr_warning("unknown branch filter %s,"
  68                                     " check man page\n", s);
  69                         goto error;
  70                 }
  71
  72                 *mode |= br->mode;
  73
  74                 if (!p)
  75                         break;
  76
  77                 s = p + 1;
  78         }
  79
  80         /* default to any branch */
  81         if ((*mode & ~ONLY_PLM) == 0) {
  82                 *mode = PERF_SAMPLE_BRANCH_ANY;
  83         }
  84 error:
  85         free(os);
  86         return ret;
  87 }
  88
  89 int
  90 parse_branch_stack(const struct option *opt, const char *str, int unset)
  91 {
  92         __u64 *mode = (__u64 *)opt->value;
  93
  94         if (unset)
  95                 return 0;
  96
  97         /*
  98          * cannot set it twice, -b + --branch-filter for instance
  99          */
 100         if (*mode)
 101                 return -1;
 102
 103         return parse_branch_str(str, mode);
 104 }