Signed-off-by: Chris Wilson <[email protected]>
Cc: Abdiel Janulgue <[email protected]>
---
tests/i915/gem_mmap_gtt.c | 98 +++++++++++++++++++++++++++++++++++++++
1 file changed, 98 insertions(+)
diff --git a/tests/i915/gem_mmap_gtt.c b/tests/i915/gem_mmap_gtt.c
index 8eff91850..81068f7d1 100644
--- a/tests/i915/gem_mmap_gtt.c
+++ b/tests/i915/gem_mmap_gtt.c
@@ -26,6 +26,7 @@
*/
#include <unistd.h>
+#include <stdatomic.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
@@ -360,6 +361,99 @@ test_isolation(int i915)
igt_assert(ptr == MAP_FAILED);
}
+static void
+test_close_race(int i915)
+{
+ const int ncpus = sysconf(_SC_NPROCESSORS_ONLN);
+ uint32_t *handles;
+
+ handles = mmap64(0, 4096, PROT_WRITE, MAP_SHARED | MAP_ANON, -1, 0);
+ igt_assert(handles != MAP_FAILED);
+
+ igt_fork(child, ncpus) {
+ do {
+ struct drm_i915_gem_mmap_gtt mmap_arg = {};
+ int i = 1 + random() % ncpus;
+ uint32_t old;
+
+ mmap_arg.handle = gem_create(i915, 4096);
+ old = atomic_exchange(&handles[i], mmap_arg.handle);
+ ioctl(i915, DRM_IOCTL_GEM_CLOSE, &old);
+
+ if (ioctl(i915,
+ DRM_IOCTL_I915_GEM_MMAP_GTT,
+ &mmap_arg) != -1) {
+ void *ptr;
+
+ ptr = mmap64(0, 4096,
+ PROT_READ, MAP_SHARED, i915,
+ mmap_arg.offset);
+ if (ptr != MAP_FAILED)
+ munmap(ptr, 4096);
+ }
+ } while (!READ_ONCE(handles[0]));
+ }
+
+ sleep(20);
+ handles[0] = 1;
+ igt_waitchildren();
+
+ for (int i = 1; i <= ncpus; i++)
+ ioctl(i915, DRM_IOCTL_GEM_CLOSE, handles[i]);
+ munmap(handles, 4096);
+}
+
+static void
+test_flink_race(int i915)
+{
+ const int ncpus = sysconf(_SC_NPROCESSORS_ONLN);
+ uint32_t *handles;
+
+ handles = mmap64(0, 4096, PROT_WRITE, MAP_SHARED | MAP_ANON, -1, 0);
+ igt_assert(handles != MAP_FAILED);
+
+ igt_fork(child, ncpus) {
+ int fd = gem_reopen_driver(i915);
+
+ do {
+ struct drm_i915_gem_mmap_gtt mmap_arg = {};
+ uint32_t old;
+ int i = 1 + random() % ncpus;
+
+ old = atomic_exchange(&handles[i],
+ gem_create(i915, 4096));
+ if (!old)
+ continue;
+
+ mmap_arg.handle =
+ gem_open(fd, gem_flink(i915, old));
+ ioctl(i915, DRM_IOCTL_GEM_CLOSE, &old);
+
+ if (ioctl(fd,
+ DRM_IOCTL_I915_GEM_MMAP_GTT,
+ &mmap_arg) != -1) {
+ void *ptr;
+
+ ptr = mmap64(0, 4096,
+ PROT_READ, MAP_SHARED, fd,
+ mmap_arg.offset);
+ if (ptr != MAP_FAILED)
+ munmap(ptr, 4096);
+ }
+
+ ioctl(fd, DRM_IOCTL_GEM_CLOSE, &mmap_arg.handle);
+ } while (!READ_ONCE(handles[0]));
+ }
+
+ sleep(20);
+ handles[0] = 1;
+ igt_waitchildren();
+
+ for (int i = 1; i <= ncpus; i++)
+ ioctl(i915, DRM_IOCTL_GEM_CLOSE, handles[i]);
+ munmap(handles, 4096);
+}
+
static void
test_write_gtt(int fd)
{
@@ -985,6 +1079,10 @@ igt_main
test_wc(fd);
igt_subtest("isolation")
test_isolation(fd);
+ igt_subtest("close-race")
+ test_close_race(fd);
+ igt_subtest("flink-race")
+ test_flink_race(fd);
igt_subtest("pf-nonblock")
test_pf_nonblock(fd);
--
2.23.0
_______________________________________________
Intel-gfx mailing list
[email protected]
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
