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igt/gem_exec_basic: Check that we don't write into the const execbuf arg

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For good measure, also check that we can read the args from a GTT
mmaping.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2016-03-03 09:05:13 +00:00
parent a25983e0b1
commit 95fbf7efed
1 changed files with 60 additions and 1 deletions
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61
tests/gem_exec_basic.c
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@ -45,6 +45,60 @@ static void noop(int fd, unsigned ring)
gem_close(fd, exec.handle);
}
static void readonly(int fd, unsigned ring)
{
uint32_t bbe = MI_BATCH_BUFFER_END;
struct drm_i915_gem_execbuffer2 *execbuf;
struct drm_i915_gem_exec_object2 exec;
gem_require_ring(fd, ring);
memset(&exec, 0, sizeof(exec));
exec.handle = gem_create(fd, 4096);
gem_write(fd, exec.handle, 0, &bbe, sizeof(bbe));
execbuf = mmap(NULL, 4096, PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
igt_assert(execbuf != NULL);
execbuf->buffers_ptr = (uintptr_t)&exec;
execbuf->buffer_count = 1;
execbuf->flags = ring;
igt_assert(mprotect(execbuf, 4096, PROT_READ) == 0);
gem_execbuf(fd, execbuf);
munmap(execbuf, 4096);
gem_close(fd, exec.handle);
}
static void gtt(int fd, unsigned ring)
{
uint32_t bbe = MI_BATCH_BUFFER_END;
struct drm_i915_gem_execbuffer2 *execbuf;
struct drm_i915_gem_exec_object2 *exec;
uint32_t handle;
gem_require_ring(fd, ring);
handle = gem_create(fd, 4096);
gem_set_domain(fd, handle, I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT);
execbuf = gem_mmap__gtt(fd, handle, 4096, PROT_WRITE);
exec = (struct drm_i915_gem_exec_object2 *)(execbuf + 1);
gem_close(fd, handle);
exec->handle = gem_create(fd, 4096);
gem_write(fd, exec->handle, 0, &bbe, sizeof(bbe));
execbuf->buffers_ptr = (uintptr_t)exec;
execbuf->buffer_count = 1;
execbuf->flags = ring;
gem_execbuf(fd, execbuf);
gem_close(fd, exec->handle);
munmap(execbuf, 4096);
}
igt_main
{
const struct intel_execution_engine *e;
@ -53,9 +107,14 @@ igt_main
igt_fixture
fd = drm_open_driver(DRIVER_INTEL);
for (e = intel_execution_engines; e->name; e++)
for (e = intel_execution_engines; e->name; e++) {
igt_subtest_f("basic-%s", e->name)
noop(fd, e->exec_id | e->flags);
igt_subtest_f("readonly-%s", e->name)
readonly(fd, e->exec_id | e->flags);
igt_subtest_f("gtt-%s", e->name)
gtt(fd, e->exec_id | e->flags);
}
igt_fixture
close(fd);