LXR linux/tools/perf/tests/map

   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
  10struct map_def {
  11        const char *name;
  12        u64 start;
  13        u64 end;
  14};
  15
  16static 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
  37int 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}
 122