On 07/11/2014 10:40 AM, Chris Wilson wrote:
If the parent passes a userptr to some private memory, we expect to
still be able to use the userptr in the child.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
tests/gem_userptr_blits.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 52 insertions(+)
diff --git a/tests/gem_userptr_blits.c b/tests/gem_userptr_blits.c
index 9cf681b..454db58 100644
--- a/tests/gem_userptr_blits.c
+++ b/tests/gem_userptr_blits.c
@@ -542,6 +542,55 @@ static int test_invalid_mapping(int fd)
return 0;
}
+static void test_forked_access(int fd)
+{
+ uint32_t handle1, handle2;
+ void *ptr1, *ptr2;
+ int ret;
+
+ ret = posix_memalign(&ptr1, PAGE_SIZE, PAGE_SIZE);
+ igt_assert(ret == 0);
+
+ ret = madvise(ptr1, PAGE_SIZE, MADV_DONTFORK);
+ igt_assert(ret == 0);
+
+ ret = gem_userptr(fd, ptr1, PAGE_SIZE, 0, &handle1);
+ igt_assert(ret == 0);
+
+ ret = posix_memalign(&ptr2, PAGE_SIZE, PAGE_SIZE);
+ igt_assert(ret == 0);
+
+ ret = madvise(ptr2, PAGE_SIZE, MADV_DONTFORK);
+ igt_assert(ret == 0);
+
+ ret = gem_userptr(fd, ptr2, PAGE_SIZE, 0, &handle2);
+ igt_assert(ret == 0);
+
+ memset(ptr1, 0x1, PAGE_SIZE);
+ memset(ptr2, 0x2, PAGE_SIZE);
+
+ igt_fork(child, 1) {
+ copy(fd, handle1, handle2, 0);
+ }
+ igt_waitchildren();
+
+ gem_userptr_sync(fd, handle1);
+ gem_userptr_sync(fd, handle2);
+
+ gem_close(fd, handle1);
+ gem_close(fd, handle2);
+
+ igt_assert(memcmp(ptr1, ptr2, PAGE_SIZE) == 0);
+
+ ret = madvise(ptr1, PAGE_SIZE, MADV_DOFORK);
+ igt_assert(ret == 0);
+ free(ptr1);
+
+ ret = madvise(ptr2, PAGE_SIZE, MADV_DOFORK);
+ igt_assert(ret == 0);
+ free(ptr2);
+}
+
static int test_forbidden_ops(int fd)
{
void *ptr;
@@ -1108,6 +1157,9 @@ int main(int argc, char **argv)
igt_subtest("invalid-mapping")
test_invalid_mapping(fd);
+ igt_subtest("forked-access")
+ test_forked_access(fd);
+
igt_subtest("forbidden-operations")
test_forbidden_ops(fd);
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
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