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

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "util/debug.h"
   3 #include "util/event.h"
   4 #include <subcmd/parse-options.h>
   5 #include "util/parse-branch-options.h"
   6 #include <stdlib.h>
   7 #include <string.h>
   8
   9 #define BRANCH_OPT(n, m) \
  10         { .name = n, .mode = (m) }
  11
  12 #define BRANCH_END { .name = NULL }
  13
  14 struct branch_mode {
  15         const char *name;
  16         int mode;
  17 };
  18
  19 static const struct branch_mode branch_modes[] = {
  20         BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER),
  21         BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL),
  22         BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV),
  23         BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY),
  24         BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL),
  25         BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN),
  26         BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL),
  27         BRANCH_OPT("abort_tx", PERF_SAMPLE_BRANCH_ABORT_TX),
  28         BRANCH_OPT("in_tx", PERF_SAMPLE_BRANCH_IN_TX),
  29         BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NO_TX),
  30         BRANCH_OPT("cond", PERF_SAMPLE_BRANCH_COND),
  31         BRANCH_OPT("ind_jmp", PERF_SAMPLE_BRANCH_IND_JUMP),
  32         BRANCH_OPT("call", PERF_SAMPLE_BRANCH_CALL),
  33         BRANCH_OPT("no_flags", PERF_SAMPLE_BRANCH_NO_FLAGS),
  34         BRANCH_OPT("no_cycles", PERF_SAMPLE_BRANCH_NO_CYCLES),
  35         BRANCH_OPT("save_type", PERF_SAMPLE_BRANCH_TYPE_SAVE),
  36         BRANCH_OPT("stack", PERF_SAMPLE_BRANCH_CALL_STACK),
  37         BRANCH_OPT("hw_index", PERF_SAMPLE_BRANCH_HW_INDEX),
  38         BRANCH_OPT("priv", PERF_SAMPLE_BRANCH_PRIV_SAVE),
  39         BRANCH_END
  40 };
  41
  42 int parse_branch_str(const char *str, __u64 *mode)
  43 {
  44 #define ONLY_PLM \
  45         (PERF_SAMPLE_BRANCH_USER        |\
  46          PERF_SAMPLE_BRANCH_KERNEL      |\
  47          PERF_SAMPLE_BRANCH_HV)
  48
  49         int ret = 0;
  50         char *p, *s;
  51         char *os = NULL;
  52         const struct branch_mode *br;
  53
  54         if (str == NULL) {
  55                 *mode = PERF_SAMPLE_BRANCH_ANY;
  56                 return 0;
  57         }
  58
  59         /* because str is read-only */
  60         s = os = strdup(str);
  61         if (!s)
  62                 return -1;
  63
  64         for (;;) {
  65                 p = strchr(s, ',');
  66                 if (p)
  67                         *p = '\0';
  68
  69                 for (br = branch_modes; br->name; br++) {
  70                         if (!strcasecmp(s, br->name))
  71                                 break;
  72                 }
  73                 if (!br->name) {
  74                         ret = -1;
  75                         pr_warning("unknown branch filter %s,"
  76                                     " check man page\n", s);
  77                         goto error;
  78                 }
  79
  80                 *mode |= br->mode;
  81
  82                 if (!p)
  83                         break;
  84
  85                 s = p + 1;
  86         }
  87
  88         /* default to any branch */
  89         if ((*mode & ~ONLY_PLM) == 0) {
  90                 *mode = PERF_SAMPLE_BRANCH_ANY;
  91         }
  92 error:
  93         free(os);
  94         return ret;
  95 }
  96
  97 int
  98 parse_branch_stack(const struct option *opt, const char *str, int unset)
  99 {
 100         __u64 *mode = (__u64 *)opt->value;
 101
 102         if (unset)
 103                 return 0;
 104
 105         /*
 106          * cannot set it twice, -b + --branch-filter for instance
 107          */
 108         if (*mode) {
 109                 pr_err("Error: Can't use --branch-any (-b) with --branch-filter (-j).\n");
 110                 return -1;
 111         }
 112
 113         return parse_branch_str(str, mode);
 114 }