tools/perf/tests/map_groups.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/compiler.h>
   3 #include <linux/kernel.h>
   4 #include "tests.h"
   5 #include "map.h"
   6 #include "map_groups.h"
   7 #include "dso.h"
   8 #include "debug.h"
   9
  10 struct map_def {
  11         const char *name;
  12         u64 start;
  13         u64 end;
  14 };
  15
  16 static int check_maps(struct map_def *merged, unsigned int size, struct map_groups *mg)
  17 {
  18         struct map *map;
  19         unsigned int i = 0;
  20
  21         map = map_groups__first(mg);
  22         while (map) {
  23                 TEST_ASSERT_VAL("wrong map start",  map->start == merged[i].start);
  24                 TEST_ASSERT_VAL("wrong map end",    map->end == merged[i].end);
  25                 TEST_ASSERT_VAL("wrong map name",  !strcmp(map->dso->name, merged[i].name));
  26                 TEST_ASSERT_VAL("wrong map refcnt", refcount_read(&map->refcnt) == 2);
  27
  28                 i++;
  29                 map = map_groups__next(map);
  30
  31                 TEST_ASSERT_VAL("less maps expected", (map && i < size) || (!map && i == size));
  32         }
  33
  34         return TEST_OK;
  35 }
  36
  37 int test__map_groups__merge_in(struct test *t __maybe_unused, int subtest __maybe_unused)
  38 {
  39         struct map_groups mg;
  40         unsigned int i;
  41         struct map_def bpf_progs[] = {
  42                 { "bpf_prog_1", 200, 300 },
  43                 { "bpf_prog_2", 500, 600 },
  44                 { "bpf_prog_3", 800, 900 },
  45         };
  46         struct map_def merged12[] = {
  47                 { "kcore1",     100,  200 },
  48                 { "bpf_prog_1", 200,  300 },
  49                 { "kcore1",     300,  500 },
  50                 { "bpf_prog_2", 500,  600 },
  51                 { "kcore1",     600,  800 },
  52                 { "bpf_prog_3", 800,  900 },
  53                 { "kcore1",     900, 1000 },
  54         };
  55         struct map_def merged3[] = {
  56                 { "kcore1",      100,  200 },
  57                 { "bpf_prog_1",  200,  300 },
  58                 { "kcore1",      300,  500 },
  59                 { "bpf_prog_2",  500,  600 },
  60                 { "kcore1",      600,  800 },
  61                 { "bpf_prog_3",  800,  900 },
  62                 { "kcore1",      900, 1000 },
  63                 { "kcore3",     1000, 1100 },
  64         };
  65         struct map *map_kcore1, *map_kcore2, *map_kcore3;
  66         int ret;
  67
  68         map_groups__init(&mg, NULL);
  69
  70         for (i = 0; i < ARRAY_SIZE(bpf_progs); i++) {
  71                 struct map *map;
  72
  73                 map = dso__new_map(bpf_progs[i].name);
  74                 TEST_ASSERT_VAL("failed to create map", map);
  75
  76                 map->start = bpf_progs[i].start;
  77                 map->end   = bpf_progs[i].end;
  78                 map_groups__insert(&mg, map);
  79                 map__put(map);
  80         }
  81
  82         map_kcore1 = dso__new_map("kcore1");
  83         TEST_ASSERT_VAL("failed to create map", map_kcore1);
  84
  85         map_kcore2 = dso__new_map("kcore2");
  86         TEST_ASSERT_VAL("failed to create map", map_kcore2);
  87
  88         map_kcore3 = dso__new_map("kcore3");
  89         TEST_ASSERT_VAL("failed to create map", map_kcore3);
  90
  91         /* kcore1 map overlaps over all bpf maps */
  92         map_kcore1->start = 100;
  93         map_kcore1->end   = 1000;
  94
  95         /* kcore2 map hides behind bpf_prog_2 */
  96         map_kcore2->start = 550;
  97         map_kcore2->end   = 570;
  98
  99         /* kcore3 map hides behind bpf_prog_3, kcore1 and adds new map */
 100         map_kcore3->start = 880;
 101         map_kcore3->end   = 1100;
 102
 103         ret = map_groups__merge_in(&mg, map_kcore1);
 104         TEST_ASSERT_VAL("failed to merge map", !ret);
 105
 106         ret = check_maps(merged12, ARRAY_SIZE(merged12), &mg);
 107         TEST_ASSERT_VAL("merge check failed", !ret);
 108
 109         ret = map_groups__merge_in(&mg, map_kcore2);
 110         TEST_ASSERT_VAL("failed to merge map", !ret);
 111
 112         ret = check_maps(merged12, ARRAY_SIZE(merged12), &mg);
 113         TEST_ASSERT_VAL("merge check failed", !ret);
 114
 115         ret = map_groups__merge_in(&mg, map_kcore3);
 116         TEST_ASSERT_VAL("failed to merge map", !ret);
 117
 118         ret = check_maps(merged3, ARRAY_SIZE(merged3), &mg);
 119         TEST_ASSERT_VAL("merge check failed", !ret);
 120         return TEST_OK;
 121 }