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/*
* Copyright © 2014 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Daniel Vetter <daniel.vetter@ffwll.ch>
*
*/
#include "igt.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/resource.h>
#include <sys/time.h>
#include <fcntl.h>
#include <limits.h>
unsigned int original_nr_open;
static int read_sysctl(const char *path)
{
unsigned int val;
FILE *f = fopen(path, "r");
if (f) {
igt_assert(fscanf(f, "%u", &val) == 1);
fclose(f);
return val;
}
return -errno;
}
static int write_sysctl(const char *path, unsigned int val)
{
FILE *f = fopen(path, "w");
if (f) {
igt_assert(fprintf(f, "%u", val));
fclose(f);
return 0;
}
return -errno;
}
static bool allow_unlimited_files(void)
{
unsigned int nofile_rlim = 1024*1024;
struct rlimit rlim;
unsigned int buf;
buf = read_sysctl("/proc/sys/fs/file-max");
if (buf > 0)
nofile_rlim = buf;
original_nr_open = read_sysctl("/proc/sys/fs/nr_open");
igt_assert(write_sysctl("/proc/sys/fs/nr_open", nofile_rlim) == 0);
if (getrlimit(RLIMIT_NOFILE, &rlim))
return false;
rlim.rlim_cur = nofile_rlim;
rlim.rlim_max = nofile_rlim;
return setrlimit(RLIMIT_NOFILE, &rlim) == 0;
}
static void restore_original_sysctl(int sig)
{
if (original_nr_open > 0)
write_sysctl("/proc/sys/fs/nr_open", original_nr_open);
}
igt_simple_main
{
int fd;
igt_require(allow_unlimited_files());
fd = drm_open_driver(DRIVER_INTEL);
igt_install_exit_handler(restore_original_sysctl);
igt_fork(n, 1) {
igt_drop_root();
for (int i = 0; ; i++) {
int leak = open("/dev/null", O_RDONLY);
uint32_t handle;
if (__gem_create(fd, 4096, &handle) == 0)
gem_close(fd, handle);
if (leak < 0) {
igt_info("fd exhaustion after %i rounds.\n", i);
igt_assert(__gem_create(fd, 4096,
&handle) < 0);
break;
}
}
/* The child will free all the fds when exiting, so no need to
* clean up to mess to ensure that the parent can at least run
* the exit handlers. */
}
igt_waitchildren();
close(fd);
}
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