igt: Add gem_close

What transpired recently was that we allow a single process to create
multiple handles to the same VMA (which I broke). Make sure we test!

References: https://bugs.freedesktop.org/show_bug.cgi?id=102355
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

2 files changed, 91 insertions, 0 deletions

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 4dc89517..af0aee61 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -45,6 +45,7 @@ TESTS_progs = \
 	gem_basic \
 	gem_busy \
 	gem_caching \
+	gem_close \
 	gem_close_race \
 	gem_concurrent_blit \
 	gem_cpu_reloc \
diff --git a/tests/gem_close.c b/tests/gem_close.c
new file mode 100644
index 00000000..ac846f22
--- /dev/null
+++ b/tests/gem_close.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright © 2017 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.
+ */
+
+#include "igt.h"
+
+static void test_many_handles(int fd)
+{
+	uint32_t bbe = MI_BATCH_BUFFER_END;
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 obj[2];
+	uint32_t clones[1024];
+	uint32_t original;
+
+	original = gem_create(fd, 4096);
+	gem_write(fd, original, 0, &bbe, sizeof(bbe));
+
+	memset(&execbuf, 0, sizeof(execbuf));
+	execbuf.buffers_ptr = to_user_pointer(obj);
+	execbuf.buffer_count = 1;
+
+	memset(obj, 0, sizeof(obj));
+	obj[0].handle = original;
+	gem_execbuf(fd, &execbuf);
+
+	for (int i = 0; i < ARRAY_SIZE(clones); i++) {
+		uint32_t name = gem_flink(fd, original);
+		clones[i] = gem_open(fd, name);
+		obj[0].handle = clones[i];
+		gem_execbuf(fd, &execbuf);
+	}
+
+	execbuf.buffer_count = 2;
+	obj[0].handle = original;
+	for (int i = 0; i < ARRAY_SIZE(clones); i++) {
+		obj[1].handle = clones[i];
+		igt_assert_eq(__gem_execbuf(fd, &execbuf), -EINVAL);
+	}
+	execbuf.buffer_count = 1;
+
+	/* Now close the object having used every clone */
+	obj[0].handle = original;
+	gem_close(fd, original);
+	igt_assert_eq(__gem_execbuf(fd, &execbuf), -ENOENT);
+
+	/* All clones should still be operational */
+	for (int i = 0; i < ARRAY_SIZE(clones); i++) {
+		obj[0].handle = clones[i];
+		gem_execbuf(fd, &execbuf);
+
+		/* ... until closed */
+		gem_close(fd, clones[i]);
+		igt_assert_eq(__gem_execbuf(fd, &execbuf), -ENOENT);
+	}
+}
+
+igt_main
+{
+	int fd = -1;
+
+	igt_fixture {
+		fd = drm_open_driver(DRIVER_INTEL);
+		igt_require_gem(fd);
+	}
+
+	igt_subtest("basic")
+		gem_close(fd, gem_create(fd, 4096));
+
+	igt_subtest("many-handles-one-vma")
+		test_many_handles(fd);
+}