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804e11f40d
Add a header that includes all the headers for the library. This allows reorganisation of the library without affecting programs using it and also simplifies the headers that need to be included to use the library. Signed-off-by: Thomas Wood <thomas.wood@intel.com>
93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/*
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* Copyright © 2012 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Daniel Vetter <daniel.vetter@ffwll.ch>
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*
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*/
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#include "igt.h"
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include "drm.h"
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IGT_TEST_DESCRIPTION("Checks whether the kernel handles mmap offset exhaustion"
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" correctly.");
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#define OBJECT_SIZE (1024*1024)
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/* Testcase: checks whether the kernel handles mmap offset exhaustion correctly
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*
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* Currently the kernel doesn't reap the mmap offset of purged objects, albeit
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* there's nothing that prevents it ABI-wise and it helps to get out of corners
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* (because drm_mm is only 32bit on 32bit archs unfortunately.
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*
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* Note that on 64bit machines we have plenty of address space (because drm_mm
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* uses unsigned long).
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*/
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static void
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create_and_map_bo(int fd)
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{
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uint32_t handle;
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char *ptr;
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handle = gem_create(fd, OBJECT_SIZE);
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ptr = gem_mmap(fd, handle, OBJECT_SIZE, PROT_READ | PROT_WRITE);
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igt_assert(ptr);
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/* touch it to force it into the gtt */
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*ptr = 0;
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/* but then unmap it again because we only have limited address space on
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* 32 bit */
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munmap(ptr, OBJECT_SIZE);
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/* we happily leak objects to exhaust mmap offset space, the kernel will
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* reap backing storage. */
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gem_madvise(fd, handle, I915_MADV_DONTNEED);
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}
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igt_simple_main
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{
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int fd, i;
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igt_skip_on_simulation();
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fd = drm_open_any();
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/* we have 32bit of address space, so try to fit one MB more
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* than that. */
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for (i = 0; i < 4096 + 1; i++)
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create_and_map_bo(fd);
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close(fd);
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}
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