tools/perf/util/topdown.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <stdio.h>
   3 #include "pmu.h"
   4 #include "pmu-hybrid.h"
   5 #include "topdown.h"
   6
   7 int topdown_filter_events(const char **attr, char **str, bool use_group,
   8                           const char *pmu_name)
   9 {
  10         int off = 0;
  11         int i;
  12         int len = 0;
  13         char *s;
  14         bool is_hybrid = perf_pmu__is_hybrid(pmu_name);
  15
  16         for (i = 0; attr[i]; i++) {
  17                 if (pmu_have_event(pmu_name, attr[i])) {
  18                         if (is_hybrid)
  19                                 len += strlen(attr[i]) + strlen(pmu_name) + 3;
  20                         else
  21                                 len += strlen(attr[i]) + 1;
  22                         attr[i - off] = attr[i];
  23                 } else
  24                         off++;
  25         }
  26         attr[i - off] = NULL;
  27
  28         *str = malloc(len + 1 + 2);
  29         if (!*str)
  30                 return -1;
  31         s = *str;
  32         if (i - off == 0) {
  33                 *s = 0;
  34                 return 0;
  35         }
  36         if (use_group)
  37                 *s++ = '{';
  38         for (i = 0; attr[i]; i++) {
  39                 if (!is_hybrid)
  40                         strcpy(s, attr[i]);
  41                 else
  42                         sprintf(s, "%s/%s/", pmu_name, attr[i]);
  43                 s += strlen(s);
  44                 *s++ = ',';
  45         }
  46         if (use_group) {
  47                 s[-1] = '}';
  48                 *s = 0;
  49         } else
  50                 s[-1] = 0;
  51         return 0;
  52 }
  53
  54 __weak bool arch_topdown_check_group(bool *warn)
  55 {
  56         *warn = false;
  57         return false;
  58 }
  59
  60 __weak void arch_topdown_group_warn(void)
  61 {
  62 }
  63
  64 __weak bool arch_topdown_sample_read(struct evsel *leader __maybe_unused)
  65 {
  66         return false;
  67 }