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// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
#include <linux/string.h>
#include <sys/mman.h>
#include <limits.h>
#include "debug.h"
#include "dso.h"
#include "machine.h"
#include "thread.h"
#include "symbol.h"
#include "map.h"
#include "util.h"
#include "tests.h"
struct test_info {
struct machine *machine;
struct thread *thread;
};
static int init_test_info(struct test_info *ti)
{
ti->machine = machine__new_host();
if (!ti->machine) {
pr_debug("machine__new_host() failed!\n");
return TEST_FAIL;
}
/* Create a dummy thread */
ti->thread = machine__findnew_thread(ti->machine, 100, 100);
if (!ti->thread) {
pr_debug("machine__findnew_thread() failed!\n");
return TEST_FAIL;
}
return TEST_OK;
}
static void exit_test_info(struct test_info *ti)
{
thread__put(ti->thread);
machine__delete(ti->machine);
}
struct dso_map {
struct dso *dso;
struct map *map;
};
static int find_map_cb(struct map *map, void *d)
{
struct dso_map *data = d;
if (map__dso(map) != data->dso)
return 0;
data->map = map;
return 1;
}
static struct map *find_module_map(struct machine *machine, struct dso *dso)
{
struct dso_map data = { .dso = dso };
machine__for_each_kernel_map(machine, find_map_cb, &data);
return data.map;
}
static void get_test_dso_filename(char *filename, size_t max_sz)
{
if (dso_to_test)
strlcpy(filename, dso_to_test, max_sz);
else
perf_exe(filename, max_sz);
}
static int create_map(struct test_info *ti, char *filename, struct map **map_p)
{
struct dso *dso = machine__findnew_dso(ti->machine, filename);
/*
* If 'filename' matches a current kernel module, must use a kernel
* map. Find the one that already exists.
*/
if (dso && dso->kernel) {
*map_p = find_module_map(ti->machine, dso);
dso__put(dso);
if (!*map_p) {
pr_debug("Failed to find map for current kernel module %s",
filename);
return TEST_FAIL;
}
map__get(*map_p);
return TEST_OK;
}
dso__put(dso);
/* Create a dummy map at 0x100000 */
*map_p = map__new(ti->machine, 0x100000, 0xffffffff, 0, NULL,
PROT_EXEC, 0, NULL, filename, ti->thread);
if (!*map_p) {
pr_debug("Failed to create map!");
return TEST_FAIL;
}
return TEST_OK;
}
static int test_dso(struct dso *dso)
{
struct symbol *last_sym = NULL;
struct rb_node *nd;
int ret = TEST_OK;
/* dso__fprintf() prints all the symbols */
if (verbose > 1)
dso__fprintf(dso, stderr);
for (nd = rb_first_cached(&dso->symbols); nd; nd = rb_next(nd)) {
struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
if (sym->type != STT_FUNC && sym->type != STT_GNU_IFUNC)
continue;
/* Check for overlapping function symbols */
if (last_sym && sym->start < last_sym->end) {
pr_debug("Overlapping symbols:\n");
symbol__fprintf(last_sym, stderr);
symbol__fprintf(sym, stderr);
ret = TEST_FAIL;
}
/* Check for zero-length function symbol */
if (sym->start == sym->end) {
pr_debug("Zero-length symbol:\n");
symbol__fprintf(sym, stderr);
ret = TEST_FAIL;
}
last_sym = sym;
}
return ret;
}
static int subdivided_dso_cb(struct dso *dso, struct machine *machine __maybe_unused, void *d)
{
struct dso *text_dso = d;
if (dso != text_dso && strstarts(dso->short_name, text_dso->short_name))
if (test_dso(dso) != TEST_OK)
return -1;
return 0;
}
static int process_subdivided_dso(struct machine *machine, struct dso *dso)
{
int ret;
ret = machine__for_each_dso(machine, subdivided_dso_cb, dso);
return ret < 0 ? TEST_FAIL : TEST_OK;
}
static int test_file(struct test_info *ti, char *filename)
{
struct map *map = NULL;
int ret, nr;
struct dso *dso;
pr_debug("Testing %s\n", filename);
ret = create_map(ti, filename, &map);
if (ret != TEST_OK)
return ret;
dso = map__dso(map);
nr = dso__load(dso, map);
if (nr < 0) {
pr_debug("dso__load() failed!\n");
ret = TEST_FAIL;
goto out_put;
}
if (nr == 0) {
pr_debug("DSO has no symbols!\n");
ret = TEST_SKIP;
goto out_put;
}
ret = test_dso(dso);
/* Module dso is split into many dsos by section */
if (ret == TEST_OK && dso->kernel)
ret = process_subdivided_dso(ti->machine, dso);
out_put:
map__put(map);
return ret;
}
static int test__symbols(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
{
char filename[PATH_MAX];
struct test_info ti;
int ret;
ret = init_test_info(&ti);
if (ret != TEST_OK)
return ret;
get_test_dso_filename(filename, sizeof(filename));
ret = test_file(&ti, filename);
exit_test_info(&ti);
return ret;
}
DEFINE_SUITE("Symbols", symbols);
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