#include <inttypes.h>
#include <linux/compiler.h>
#include <linux/kernel.h>
#include "tests.h"
#include "map.h"
#include "maps.h"
#include "dso.h"
#include "debug.h"
struct map_def {
const char *name;
u64 start;
u64 end;
};
struct check_maps_cb_args {
struct map_def *merged;
unsigned int i;
};
static int check_maps_cb(struct map *map, void *data)
{
struct check_maps_cb_args *args = data;
struct map_def *merged = &args->merged[args->i];
if (map__start(map) != merged->start ||
map__end(map) != merged->end ||
strcmp(dso__name(map__dso(map)), merged->name) ||
refcount_read(map__refcnt(map)) != 1) {
return 1;
}
args->i++;
return 0;
}
static int failed_cb(struct map *map, void *data __maybe_unused)
{
pr_debug("\tstart: %" PRIu64 " end: %" PRIu64 " name: '%s' refcnt: %d\n",
map__start(map),
map__end(map),
dso__name(map__dso(map)),
refcount_read(map__refcnt(map)));
return 0;
}
static int check_maps(struct map_def *merged, unsigned int size, struct maps *maps)
{
bool failed = false;
if (maps__nr_maps(maps) != size) {
pr_debug("Expected %d maps, got %d", size, maps__nr_maps(maps));
failed = true;
} else {
struct check_maps_cb_args args = {
.merged = merged,
.i = 0,
};
failed = maps__for_each_map(maps, check_maps_cb, &args);
}
if (failed) {
pr_debug("Expected:\n");
for (unsigned int i = 0; i < size; i++) {
pr_debug("\tstart: %" PRIu64 " end: %" PRIu64 " name: '%s' refcnt: 1\n",
merged[i].start, merged[i].end, merged[i].name);
}
pr_debug("Got:\n");
maps__for_each_map(maps, failed_cb, NULL);
}
return failed ? TEST_FAIL : TEST_OK;
}
static int test__maps__merge_in(struct test_suite *t __maybe_unused, int subtest __maybe_unused)
{
unsigned int i;
struct map_def bpf_progs[] = {
{ "bpf_prog_1", 200, 300 },
{ "bpf_prog_2", 500, 600 },
{ "bpf_prog_3", 800, 900 },
};
struct map_def merged12[] = {
{ "kcore1", 100, 200 },
{ "bpf_prog_1", 200, 300 },
{ "kcore1", 300, 500 },
{ "bpf_prog_2", 500, 600 },
{ "kcore1", 600, 800 },
{ "bpf_prog_3", 800, 900 },
{ "kcore1", 900, 1000 },
};
struct map_def merged3[] = {
{ "kcore1", 100, 200 },
{ "bpf_prog_1", 200, 300 },
{ "kcore1", 300, 500 },
{ "bpf_prog_2", 500, 600 },
{ "kcore1", 600, 800 },
{ "bpf_prog_3", 800, 900 },
{ "kcore1", 900, 1000 },
{ "kcore3", 1000, 1100 },
};
struct map *map_kcore1, *map_kcore2, *map_kcore3;
int ret;
struct maps *maps = maps__new(NULL);
TEST_ASSERT_VAL("failed to create maps", maps);
for (i = 0; i < ARRAY_SIZE(bpf_progs); i++) {
struct map *map;
map = dso__new_map(bpf_progs[i].name);
TEST_ASSERT_VAL("failed to create map", map);
map__set_start(map, bpf_progs[i].start);
map__set_end(map, bpf_progs[i].end);
TEST_ASSERT_VAL("failed to insert map", maps__insert(maps, map) == 0);
map__put(map);
}
map_kcore1 = dso__new_map("kcore1");
TEST_ASSERT_VAL("failed to create map", map_kcore1);
map_kcore2 = dso__new_map("kcore2");
TEST_ASSERT_VAL("failed to create map", map_kcore2);
map_kcore3 = dso__new_map("kcore3");
TEST_ASSERT_VAL("failed to create map", map_kcore3);
map__set_start(map_kcore1, 100);
map__set_end(map_kcore1, 1000);
map__set_start(map_kcore2, 550);
map__set_end(map_kcore2, 570);
map__set_start(map_kcore3, 880);
map__set_end(map_kcore3, 1100);
ret = maps__merge_in(maps, map_kcore1);
TEST_ASSERT_VAL("failed to merge map", !ret);
ret = check_maps(merged12, ARRAY_SIZE(merged12), maps);
TEST_ASSERT_VAL("merge check failed", !ret);
ret = maps__merge_in(maps, map_kcore2);
TEST_ASSERT_VAL("failed to merge map", !ret);
ret = check_maps(merged12, ARRAY_SIZE(merged12), maps);
TEST_ASSERT_VAL("merge check failed", !ret);
ret = maps__merge_in(maps, map_kcore3);
TEST_ASSERT_VAL("failed to merge map", !ret);
ret = check_maps(merged3, ARRAY_SIZE(merged3), maps);
TEST_ASSERT_VAL("merge check failed", !ret);
maps__zput(maps);
map__zput(map_kcore1);
map__zput(map_kcore2);
map__zput(map_kcore3);
return TEST_OK;
}
static int test__maps__fixup_overlap_and_insert(struct test_suite *t __maybe_unused,
int subtest __maybe_unused)
{
struct map_def initial_maps[] = {
{ "target_map", 1000, 2000 },
{ "next_map", 3000, 4000 },
};
struct map_def insert_split = { "split_map", 1400, 1600 };
struct map_def expected_after_split[] = {
{ "target_map", 1000, 1400 },
{ "split_map", 1400, 1600 },
{ "target_map", 1600, 2000 },
{ "next_map", 3000, 4000 },
};
struct map_def insert_eclipse = { "eclipse_map", 2500, 4500 };
struct map_def expected_final[] = {
{ "target_map", 1000, 1400 },
{ "split_map", 1400, 1600 },
{ "target_map", 1600, 2000 },
{ "eclipse_map", 2500, 4500 },
};
struct map *map_split, *map_eclipse;
int ret;
unsigned int i;
struct maps *maps = maps__new(NULL);
TEST_ASSERT_VAL("failed to create maps", maps);
for (i = 0; i < ARRAY_SIZE(initial_maps); i++) {
struct map *map = dso__new_map(initial_maps[i].name);
TEST_ASSERT_VAL("failed to create map", map);
map__set_start(map, initial_maps[i].start);
map__set_end(map, initial_maps[i].end);
TEST_ASSERT_VAL("failed to insert map", maps__insert(maps, map) == 0);
map__put(map);
}
map_split = dso__new_map(insert_split.name);
TEST_ASSERT_VAL("failed to create split map", map_split);
map__set_start(map_split, insert_split.start);
map__set_end(map_split, insert_split.end);
ret = maps__fixup_overlap_and_insert(maps, map_split);
TEST_ASSERT_VAL("failed to fixup and insert split map", !ret);
map__zput(map_split);
ret = check_maps(expected_after_split, ARRAY_SIZE(expected_after_split), maps);
TEST_ASSERT_VAL("split check failed", !ret);
map_eclipse = dso__new_map(insert_eclipse.name);
TEST_ASSERT_VAL("failed to create eclipse map", map_eclipse);
map__set_start(map_eclipse, insert_eclipse.start);
map__set_end(map_eclipse, insert_eclipse.end);
ret = maps__fixup_overlap_and_insert(maps, map_eclipse);
TEST_ASSERT_VAL("failed to fixup and insert eclipse map", !ret);
map__zput(map_eclipse);
ret = check_maps(expected_final, ARRAY_SIZE(expected_final), maps);
TEST_ASSERT_VAL("eclipse check failed", !ret);
maps__zput(maps);
return TEST_OK;
}
static struct test_case tests__maps[] = {
TEST_CASE("Test merge_in interface", maps__merge_in),
TEST_CASE("Test fix up overlap interface", maps__fixup_overlap_and_insert),
{ .name = NULL, }
};
struct test_suite suite__maps = {
.desc = "Maps - per process mmaps abstraction",
.test_cases = tests__maps,
};
