| /* |
| * 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> |
| |
| |
| |
| #define FD_ARR_SZ 100 |
| int fd_arr[FD_ARR_SZ]; |
| |
| static bool allow_unlimited_files(void) |
| { |
| struct rlimit rlim; |
| unsigned nofile_rlim = 1024*1024; |
| |
| FILE *file = fopen("/proc/sys/fs/file-max", "r"); |
| if (file) { |
| igt_assert(fscanf(file, "%u", &nofile_rlim) == 1); |
| igt_info("System limit for open files is %u\n", nofile_rlim); |
| fclose(file); |
| } |
| |
| if (getrlimit(RLIMIT_NOFILE, &rlim)) |
| return false; |
| |
| rlim.rlim_cur = nofile_rlim; |
| rlim.rlim_max = nofile_rlim; |
| return setrlimit(RLIMIT_NOFILE, &rlim) == 0; |
| } |
| |
| igt_simple_main |
| { |
| int fd, i; |
| |
| igt_require(allow_unlimited_files()); |
| |
| fd = drm_open_driver(DRIVER_INTEL); |
| |
| igt_assert(open("/dev/null", O_RDONLY) >= 0); |
| |
| igt_fork(n, 1) { |
| igt_drop_root(); |
| |
| for (i = 0; ; i++) { |
| int tmp_fd = open("/dev/null", O_RDONLY); |
| uint32_t handle; |
| |
| if (tmp_fd >= 0 && i < FD_ARR_SZ) |
| fd_arr[i] = tmp_fd; |
| |
| handle = __gem_create(fd, 4096); |
| if (handle) |
| gem_close(fd, handle); |
| |
| |
| if (tmp_fd < 0) { |
| /* Ensure we actually hit the failure path ... */ |
| igt_assert(handle == 0); |
| igt_info("fd exhaustion after %i rounds.\n", i); |
| 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); |
| } |