396 lines
8.4 KiB
C
396 lines
8.4 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
#include <dirent.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <sys/time.h>
|
||
|
|
#include <sys/resource.h>
|
||
|
|
#include <api/fs/fs.h>
|
||
|
|
#include "dso.h"
|
||
|
|
#include "machine.h"
|
||
|
|
#include "symbol.h"
|
||
|
|
#include "tests.h"
|
||
|
|
#include "debug.h"
|
||
|
|
|
||
|
|
static char *test_file(int size)
|
||
|
|
{
|
||
|
|
#define TEMPL "/tmp/perf-test-XXXXXX"
|
||
|
|
static char buf_templ[sizeof(TEMPL)];
|
||
|
|
char *templ = buf_templ;
|
||
|
|
int fd, i;
|
||
|
|
unsigned char *buf;
|
||
|
|
|
||
|
|
strcpy(buf_templ, TEMPL);
|
||
|
|
#undef TEMPL
|
||
|
|
|
||
|
|
fd = mkstemp(templ);
|
||
|
|
if (fd < 0) {
|
||
|
|
perror("mkstemp failed");
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
buf = malloc(size);
|
||
|
|
if (!buf) {
|
||
|
|
close(fd);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < size; i++)
|
||
|
|
buf[i] = (unsigned char) ((int) i % 10);
|
||
|
|
|
||
|
|
if (size != write(fd, buf, size))
|
||
|
|
templ = NULL;
|
||
|
|
|
||
|
|
free(buf);
|
||
|
|
close(fd);
|
||
|
|
return templ;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define TEST_FILE_SIZE (DSO__DATA_CACHE_SIZE * 20)
|
||
|
|
|
||
|
|
struct test_data_offset {
|
||
|
|
off_t offset;
|
||
|
|
u8 data[10];
|
||
|
|
int size;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct test_data_offset offsets[] = {
|
||
|
|
/* Fill first cache page. */
|
||
|
|
{
|
||
|
|
.offset = 10,
|
||
|
|
.data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
|
||
|
|
.size = 10,
|
||
|
|
},
|
||
|
|
/* Read first cache page. */
|
||
|
|
{
|
||
|
|
.offset = 10,
|
||
|
|
.data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
|
||
|
|
.size = 10,
|
||
|
|
},
|
||
|
|
/* Fill cache boundary pages. */
|
||
|
|
{
|
||
|
|
.offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
|
||
|
|
.data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
|
||
|
|
.size = 10,
|
||
|
|
},
|
||
|
|
/* Read cache boundary pages. */
|
||
|
|
{
|
||
|
|
.offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
|
||
|
|
.data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
|
||
|
|
.size = 10,
|
||
|
|
},
|
||
|
|
/* Fill final cache page. */
|
||
|
|
{
|
||
|
|
.offset = TEST_FILE_SIZE - 10,
|
||
|
|
.data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
|
||
|
|
.size = 10,
|
||
|
|
},
|
||
|
|
/* Read final cache page. */
|
||
|
|
{
|
||
|
|
.offset = TEST_FILE_SIZE - 10,
|
||
|
|
.data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
|
||
|
|
.size = 10,
|
||
|
|
},
|
||
|
|
/* Read final cache page. */
|
||
|
|
{
|
||
|
|
.offset = TEST_FILE_SIZE - 3,
|
||
|
|
.data = { 7, 8, 9, 0, 0, 0, 0, 0, 0, 0 },
|
||
|
|
.size = 3,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
/* move it from util/dso.c for compatibility */
|
||
|
|
static int dso__data_fd(struct dso *dso, struct machine *machine)
|
||
|
|
{
|
||
|
|
int fd = dso__data_get_fd(dso, machine);
|
||
|
|
|
||
|
|
if (fd >= 0)
|
||
|
|
dso__data_put_fd(dso);
|
||
|
|
|
||
|
|
return fd;
|
||
|
|
}
|
||
|
|
|
||
|
|
int test__dso_data(struct test *test __maybe_unused, int subtest __maybe_unused)
|
||
|
|
{
|
||
|
|
struct machine machine;
|
||
|
|
struct dso *dso;
|
||
|
|
char *file = test_file(TEST_FILE_SIZE);
|
||
|
|
size_t i;
|
||
|
|
|
||
|
|
TEST_ASSERT_VAL("No test file", file);
|
||
|
|
|
||
|
|
memset(&machine, 0, sizeof(machine));
|
||
|
|
|
||
|
|
dso = dso__new((const char *)file);
|
||
|
|
|
||
|
|
TEST_ASSERT_VAL("Failed to access to dso",
|
||
|
|
dso__data_fd(dso, &machine) >= 0);
|
||
|
|
|
||
|
|
/* Basic 10 bytes tests. */
|
||
|
|
for (i = 0; i < ARRAY_SIZE(offsets); i++) {
|
||
|
|
struct test_data_offset *data = &offsets[i];
|
||
|
|
ssize_t size;
|
||
|
|
u8 buf[10];
|
||
|
|
|
||
|
|
memset(buf, 0, 10);
|
||
|
|
size = dso__data_read_offset(dso, &machine, data->offset,
|
||
|
|
buf, 10);
|
||
|
|
|
||
|
|
TEST_ASSERT_VAL("Wrong size", size == data->size);
|
||
|
|
TEST_ASSERT_VAL("Wrong data", !memcmp(buf, data->data, 10));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Read cross multiple cache pages. */
|
||
|
|
{
|
||
|
|
ssize_t size;
|
||
|
|
int c;
|
||
|
|
u8 *buf;
|
||
|
|
|
||
|
|
buf = malloc(TEST_FILE_SIZE);
|
||
|
|
TEST_ASSERT_VAL("ENOMEM\n", buf);
|
||
|
|
|
||
|
|
/* First iteration to fill caches, second one to read them. */
|
||
|
|
for (c = 0; c < 2; c++) {
|
||
|
|
memset(buf, 0, TEST_FILE_SIZE);
|
||
|
|
size = dso__data_read_offset(dso, &machine, 10,
|
||
|
|
buf, TEST_FILE_SIZE);
|
||
|
|
|
||
|
|
TEST_ASSERT_VAL("Wrong size",
|
||
|
|
size == (TEST_FILE_SIZE - 10));
|
||
|
|
|
||
|
|
for (i = 0; i < (size_t)size; i++)
|
||
|
|
TEST_ASSERT_VAL("Wrong data",
|
||
|
|
buf[i] == (i % 10));
|
||
|
|
}
|
||
|
|
|
||
|
|
free(buf);
|
||
|
|
}
|
||
|
|
|
||
|
|
dso__put(dso);
|
||
|
|
unlink(file);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static long open_files_cnt(void)
|
||
|
|
{
|
||
|
|
char path[PATH_MAX];
|
||
|
|
struct dirent *dent;
|
||
|
|
DIR *dir;
|
||
|
|
long nr = 0;
|
||
|
|
|
||
|
|
scnprintf(path, PATH_MAX, "%s/self/fd", procfs__mountpoint());
|
||
|
|
pr_debug("fd path: %s\n", path);
|
||
|
|
|
||
|
|
dir = opendir(path);
|
||
|
|
TEST_ASSERT_VAL("failed to open fd directory", dir);
|
||
|
|
|
||
|
|
while ((dent = readdir(dir)) != NULL) {
|
||
|
|
if (!strcmp(dent->d_name, ".") ||
|
||
|
|
!strcmp(dent->d_name, ".."))
|
||
|
|
continue;
|
||
|
|
|
||
|
|
nr++;
|
||
|
|
}
|
||
|
|
|
||
|
|
closedir(dir);
|
||
|
|
return nr - 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct dso **dsos;
|
||
|
|
|
||
|
|
static int dsos__create(int cnt, int size)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
dsos = malloc(sizeof(*dsos) * cnt);
|
||
|
|
TEST_ASSERT_VAL("failed to alloc dsos array", dsos);
|
||
|
|
|
||
|
|
for (i = 0; i < cnt; i++) {
|
||
|
|
char *file;
|
||
|
|
|
||
|
|
file = test_file(size);
|
||
|
|
TEST_ASSERT_VAL("failed to get dso file", file);
|
||
|
|
|
||
|
|
dsos[i] = dso__new(file);
|
||
|
|
TEST_ASSERT_VAL("failed to get dso", dsos[i]);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void dsos__delete(int cnt)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
for (i = 0; i < cnt; i++) {
|
||
|
|
struct dso *dso = dsos[i];
|
||
|
|
|
||
|
|
unlink(dso->name);
|
||
|
|
dso__put(dso);
|
||
|
|
}
|
||
|
|
|
||
|
|
free(dsos);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int set_fd_limit(int n)
|
||
|
|
{
|
||
|
|
struct rlimit rlim;
|
||
|
|
|
||
|
|
if (getrlimit(RLIMIT_NOFILE, &rlim))
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
pr_debug("file limit %ld, new %d\n", (long) rlim.rlim_cur, n);
|
||
|
|
|
||
|
|
rlim.rlim_cur = n;
|
||
|
|
return setrlimit(RLIMIT_NOFILE, &rlim);
|
||
|
|
}
|
||
|
|
|
||
|
|
int test__dso_data_cache(struct test *test __maybe_unused, int subtest __maybe_unused)
|
||
|
|
{
|
||
|
|
struct machine machine;
|
||
|
|
long nr_end, nr = open_files_cnt();
|
||
|
|
int dso_cnt, limit, i, fd;
|
||
|
|
|
||
|
|
/* Rest the internal dso open counter limit. */
|
||
|
|
reset_fd_limit();
|
||
|
|
|
||
|
|
memset(&machine, 0, sizeof(machine));
|
||
|
|
|
||
|
|
/* set as system limit */
|
||
|
|
limit = nr * 4;
|
||
|
|
TEST_ASSERT_VAL("failed to set file limit", !set_fd_limit(limit));
|
||
|
|
|
||
|
|
/* and this is now our dso open FDs limit */
|
||
|
|
dso_cnt = limit / 2;
|
||
|
|
TEST_ASSERT_VAL("failed to create dsos\n",
|
||
|
|
!dsos__create(dso_cnt, TEST_FILE_SIZE));
|
||
|
|
|
||
|
|
for (i = 0; i < (dso_cnt - 1); i++) {
|
||
|
|
struct dso *dso = dsos[i];
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Open dsos via dso__data_fd(), it opens the data
|
||
|
|
* file and keep it open (unless open file limit).
|
||
|
|
*/
|
||
|
|
fd = dso__data_fd(dso, &machine);
|
||
|
|
TEST_ASSERT_VAL("failed to get fd", fd > 0);
|
||
|
|
|
||
|
|
if (i % 2) {
|
||
|
|
#define BUFSIZE 10
|
||
|
|
u8 buf[BUFSIZE];
|
||
|
|
ssize_t n;
|
||
|
|
|
||
|
|
n = dso__data_read_offset(dso, &machine, 0, buf, BUFSIZE);
|
||
|
|
TEST_ASSERT_VAL("failed to read dso", n == BUFSIZE);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* verify the first one is already open */
|
||
|
|
TEST_ASSERT_VAL("dsos[0] is not open", dsos[0]->data.fd != -1);
|
||
|
|
|
||
|
|
/* open +1 dso to reach the allowed limit */
|
||
|
|
fd = dso__data_fd(dsos[i], &machine);
|
||
|
|
TEST_ASSERT_VAL("failed to get fd", fd > 0);
|
||
|
|
|
||
|
|
/* should force the first one to be closed */
|
||
|
|
TEST_ASSERT_VAL("failed to close dsos[0]", dsos[0]->data.fd == -1);
|
||
|
|
|
||
|
|
/* cleanup everything */
|
||
|
|
dsos__delete(dso_cnt);
|
||
|
|
|
||
|
|
/* Make sure we did not leak any file descriptor. */
|
||
|
|
nr_end = open_files_cnt();
|
||
|
|
pr_debug("nr start %ld, nr stop %ld\n", nr, nr_end);
|
||
|
|
TEST_ASSERT_VAL("failed leaking files", nr == nr_end);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static long new_limit(int count)
|
||
|
|
{
|
||
|
|
int fd = open("/dev/null", O_RDONLY);
|
||
|
|
long ret = fd;
|
||
|
|
if (count > 0)
|
||
|
|
ret = new_limit(--count);
|
||
|
|
close(fd);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
int test__dso_data_reopen(struct test *test __maybe_unused, int subtest __maybe_unused)
|
||
|
|
{
|
||
|
|
struct machine machine;
|
||
|
|
long nr_end, nr = open_files_cnt(), lim = new_limit(3);
|
||
|
|
int fd, fd_extra;
|
||
|
|
|
||
|
|
#define dso_0 (dsos[0])
|
||
|
|
#define dso_1 (dsos[1])
|
||
|
|
#define dso_2 (dsos[2])
|
||
|
|
|
||
|
|
/* Rest the internal dso open counter limit. */
|
||
|
|
reset_fd_limit();
|
||
|
|
|
||
|
|
memset(&machine, 0, sizeof(machine));
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Test scenario:
|
||
|
|
* - create 3 dso objects
|
||
|
|
* - set process file descriptor limit to current
|
||
|
|
* files count + 3
|
||
|
|
* - test that the first dso gets closed when we
|
||
|
|
* reach the files count limit
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Make sure we are able to open 3 fds anyway */
|
||
|
|
TEST_ASSERT_VAL("failed to set file limit",
|
||
|
|
!set_fd_limit((lim)));
|
||
|
|
|
||
|
|
TEST_ASSERT_VAL("failed to create dsos\n", !dsos__create(3, TEST_FILE_SIZE));
|
||
|
|
|
||
|
|
/* open dso_0 */
|
||
|
|
fd = dso__data_fd(dso_0, &machine);
|
||
|
|
TEST_ASSERT_VAL("failed to get fd", fd > 0);
|
||
|
|
|
||
|
|
/* open dso_1 */
|
||
|
|
fd = dso__data_fd(dso_1, &machine);
|
||
|
|
TEST_ASSERT_VAL("failed to get fd", fd > 0);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* open extra file descriptor and we just
|
||
|
|
* reached the files count limit
|
||
|
|
*/
|
||
|
|
fd_extra = open("/dev/null", O_RDONLY);
|
||
|
|
TEST_ASSERT_VAL("failed to open extra fd", fd_extra > 0);
|
||
|
|
|
||
|
|
/* open dso_2 */
|
||
|
|
fd = dso__data_fd(dso_2, &machine);
|
||
|
|
TEST_ASSERT_VAL("failed to get fd", fd > 0);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* dso_0 should get closed, because we reached
|
||
|
|
* the file descriptor limit
|
||
|
|
*/
|
||
|
|
TEST_ASSERT_VAL("failed to close dso_0", dso_0->data.fd == -1);
|
||
|
|
|
||
|
|
/* open dso_0 */
|
||
|
|
fd = dso__data_fd(dso_0, &machine);
|
||
|
|
TEST_ASSERT_VAL("failed to get fd", fd > 0);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* dso_1 should get closed, because we reached
|
||
|
|
* the file descriptor limit
|
||
|
|
*/
|
||
|
|
TEST_ASSERT_VAL("failed to close dso_1", dso_1->data.fd == -1);
|
||
|
|
|
||
|
|
/* cleanup everything */
|
||
|
|
close(fd_extra);
|
||
|
|
dsos__delete(3);
|
||
|
|
|
||
|
|
/* Make sure we did not leak any file descriptor. */
|
||
|
|
nr_end = open_files_cnt();
|
||
|
|
pr_debug("nr start %ld, nr stop %ld\n", nr, nr_end);
|
||
|
|
TEST_ASSERT_VAL("failed leaking files", nr == nr_end);
|
||
|
|
return 0;
|
||
|
|
}
|