perf/util/topdown.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include <stdio.h>
0003 #include "pmu.h"
0004 #include "pmu-hybrid.h"
0005 #include "topdown.h"
0006
0007 int topdown_filter_events(const char **attr, char **str, bool use_group,
0008               const char *pmu_name)
0009 {
0010     int off = 0;
0011     int i;
0012     int len = 0;
0013     char *s;
0014     bool is_hybrid = perf_pmu__is_hybrid(pmu_name);
0015
0016     for (i = 0; attr[i]; i++) {
0017         if (pmu_have_event(pmu_name, attr[i])) {
0018             if (is_hybrid)
0019                 len += strlen(attr[i]) + strlen(pmu_name) + 3;
0020             else
0021                 len += strlen(attr[i]) + 1;
0022             attr[i - off] = attr[i];
0023         } else
0024             off++;
0025     }
0026     attr[i - off] = NULL;
0027
0028     *str = malloc(len + 1 + 2);
0029     if (!*str)
0030         return -1;
0031     s = *str;
0032     if (i - off == 0) {
0033         *s = 0;
0034         return 0;
0035     }
0036     if (use_group)
0037         *s++ = '{';
0038     for (i = 0; attr[i]; i++) {
0039         if (!is_hybrid)
0040             strcpy(s, attr[i]);
0041         else
0042             sprintf(s, "%s/%s/", pmu_name, attr[i]);
0043         s += strlen(s);
0044         *s++ = ',';
0045     }
0046     if (use_group) {
0047         s[-1] = '}';
0048         *s = 0;
0049     } else
0050         s[-1] = 0;
0051     return 0;
0052 }
0053
0054 __weak bool arch_topdown_check_group(bool *warn)
0055 {
0056     *warn = false;
0057     return false;
0058 }
0059
0060 __weak void arch_topdown_group_warn(void)
0061 {
0062 }
0063
0064 __weak bool arch_topdown_sample_read(struct evsel *leader __maybe_unused)
0065 {
0066     return false;
0067 }
0068
0069 __weak const char *arch_get_topdown_pmu_name(struct evlist *evlist
0070                          __maybe_unused,
0071                          bool warn __maybe_unused)
0072 {
0073     return "cpu";
0074 }