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("save_type", PERF_SAMPLE_BRANCH_TYPE_SAVE),
  34         BRANCH_OPT("stack", PERF_SAMPLE_BRANCH_CALL_STACK),
  35         BRANCH_OPT("priv", PERF_SAMPLE_BRANCH_PRIV_SAVE),
  36         BRANCH_END
  37 };
  38
  39 int parse_branch_str(const char *str, __u64 *mode)
  40 {
  41 #define ONLY_PLM \
  42         (PERF_SAMPLE_BRANCH_USER        |\
  43          PERF_SAMPLE_BRANCH_KERNEL      |\
  44          PERF_SAMPLE_BRANCH_HV)
  45
  46         int ret = 0;
  47         char *p, *s;
  48         char *os = NULL;
  49         const struct branch_mode *br;
  50
  51         if (str == NULL) {
  52                 *mode = PERF_SAMPLE_BRANCH_ANY;
  53                 return 0;
  54         }
  55
  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                         ret = -1;
  72                         pr_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         /* default to any branch */
  86         if ((*mode & ~ONLY_PLM) == 0) {
  87                 *mode = PERF_SAMPLE_BRANCH_ANY;
  88         }
  89 error:
  90         free(os);
  91         return ret;
  92 }
  93
  94 int
  95 parse_branch_stack(const struct option *opt, const char *str, int unset)
  96 {
  97         __u64 *mode = (__u64 *)opt->value;
  98
  99         if (unset)
 100                 return 0;
 101
 102         /*
 103          * cannot set it twice, -b + --branch-filter for instance
 104          */
 105         if (*mode) {
 106                 pr_err("Error: Can't use --branch-any (-b) with --branch-filter (-j).\n");
 107                 return -1;
 108         }
 109
 110         return parse_branch_str(str, mode);
 111 }