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/*
* Copyright © 2012 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>
*
*/
/** @file gem_unfence_active_buffers.c
*
* Testcase: Check for use-after free in the fence stealing code
*
* If we're stealing the fence of a active object where the active list is the
* only thing holding a reference, we need to be careful not to access the old
* object we're stealing the fence from after that reference has been dropped by
* retire_requests.
*
* Note that this needs slab poisoning enabled in the kernel to reliably hit the
* problem - the race window is too small.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <fcntl.h>
#include <inttypes.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <stdbool.h>
#include "drm.h"
#include "i915_drm.h"
#include "drmtest.h"
#include "intel_bufmgr.h"
#include "intel_batchbuffer.h"
#include "intel_gpu_tools.h"
static drm_intel_bufmgr *bufmgr;
struct intel_batchbuffer *batch;
uint32_t devid;
#define TEST_SIZE (1024*1024)
#define TEST_STRIDE (4*1024)
uint32_t data[TEST_SIZE/4];
int main(int argc, char **argv)
{
int i, ret, fd, num_fences;
drm_intel_bo *busy_bo, *test_bo;
uint32_t tiling = I915_TILING_X;
igt_skip_on_simulation();
for (i = 0; i < 1024*256; i++)
data[i] = i;
fd = drm_open_any();
bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
drm_intel_bufmgr_gem_enable_reuse(bufmgr);
devid = intel_get_drm_devid(fd);
batch = intel_batchbuffer_alloc(bufmgr, devid);
printf("filling ring\n");
busy_bo = drm_intel_bo_alloc(bufmgr, "busy bo bo", 16*1024*1024, 4096);
for (i = 0; i < 250; i++) {
BEGIN_BATCH(8);
OUT_BATCH(XY_SRC_COPY_BLT_CMD |
XY_SRC_COPY_BLT_WRITE_ALPHA |
XY_SRC_COPY_BLT_WRITE_RGB);
OUT_BATCH((3 << 24) | /* 32 bits */
(0xcc << 16) | /* copy ROP */
2*1024*4);
OUT_BATCH(0 << 16 | 1024);
OUT_BATCH((2048) << 16 | (2048));
OUT_RELOC_FENCED(busy_bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0);
OUT_BATCH(0 << 16 | 0);
OUT_BATCH(2*1024*4);
OUT_RELOC_FENCED(busy_bo, I915_GEM_DOMAIN_RENDER, 0, 0);
ADVANCE_BATCH();
if (IS_GEN6(devid) || IS_GEN7(devid)) {
BEGIN_BATCH(3);
OUT_BATCH(XY_SETUP_CLIP_BLT_CMD);
OUT_BATCH(0);
OUT_BATCH(0);
ADVANCE_BATCH();
}
}
intel_batchbuffer_flush(batch);
num_fences = gem_available_fences(fd);
printf("creating havoc on %i fences\n", num_fences);
for (i = 0; i < num_fences*2; i++) {
test_bo = drm_intel_bo_alloc(bufmgr, "test_bo",
TEST_SIZE, 4096);
ret = drm_intel_bo_set_tiling(test_bo, &tiling, TEST_STRIDE);
assert(ret == 0);
drm_intel_bo_disable_reuse(test_bo);
BEGIN_BATCH(8);
OUT_BATCH(XY_SRC_COPY_BLT_CMD |
XY_SRC_COPY_BLT_WRITE_ALPHA |
XY_SRC_COPY_BLT_WRITE_RGB);
OUT_BATCH((3 << 24) | /* 32 bits */
(0xcc << 16) | /* copy ROP */
TEST_STRIDE);
OUT_BATCH(0 << 16 | 0);
OUT_BATCH((1) << 16 | (1));
OUT_RELOC_FENCED(test_bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0);
OUT_BATCH(0 << 16 | 0);
OUT_BATCH(TEST_STRIDE);
OUT_RELOC_FENCED(test_bo, I915_GEM_DOMAIN_RENDER, 0, 0);
ADVANCE_BATCH();
intel_batchbuffer_flush(batch);
printf("test bo offset: %#lx\n", test_bo->offset);
drm_intel_bo_unreference(test_bo);
}
/* launch a few batchs to ensure the damaged slab objects get reused. */
for (i = 0; i < 10; i++) {
BEGIN_BATCH(8);
OUT_BATCH(XY_SRC_COPY_BLT_CMD |
XY_SRC_COPY_BLT_WRITE_ALPHA |
XY_SRC_COPY_BLT_WRITE_RGB);
OUT_BATCH((3 << 24) | /* 32 bits */
(0xcc << 16) | /* copy ROP */
2*1024*4);
OUT_BATCH(0 << 16 | 1024);
OUT_BATCH((1) << 16 | (1));
OUT_RELOC_FENCED(busy_bo, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0);
OUT_BATCH(0 << 16 | 0);
OUT_BATCH(2*1024*4);
OUT_RELOC_FENCED(busy_bo, I915_GEM_DOMAIN_RENDER, 0, 0);
ADVANCE_BATCH();
if (IS_GEN6(devid) || IS_GEN7(devid)) {
BEGIN_BATCH(3);
OUT_BATCH(XY_SETUP_CLIP_BLT_CMD);
OUT_BATCH(0);
OUT_BATCH(0);
ADVANCE_BATCH();
}
}
intel_batchbuffer_flush(batch);
return 0;
}
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