On Mon, Aug 26, 2019 at 04:20:00PM +0100, Chris Wilson wrote:
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Abdiel Janulgue <abdiel.janulgue@xxxxxxxxxxxxxxx>
> ---
> 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);
../tests/i915/gem_mmap_gtt.c:380:10: error: address argument to atomic operation must be a pointer to _Atomic type ('uint32_t *' (aka 'unsigned int *') invalid)
old = atomic_exchange(&handles[i], mmap_arg.handle);
^ ~~~~~~~~~~~
/usr/lib64/clang/8.0.0/include/stdatomic.h:137:42: note: expanded from macro 'atomic_exchange'
#define atomic_exchange(object, desired) __c11_atomic_exchange(object, desired, __ATOMIC_SEQ_CST)
^ ~~~~~~
../tests/i915/gem_mmap_gtt.c:423:10: error: address argument to atomic operation must be a pointer to _Atomic type ('uint32_t *' (aka 'unsigned int *') invalid)
old = atomic_exchange(&handles[i],
^ ~~~~~~~~~~~
/usr/lib64/clang/8.0.0/include/stdatomic.h:137:42: note: expanded from macro 'atomic_exchange'
#define atomic_exchange(object, desired) __c11_atomic_exchange(object, desired, __ATOMIC_SEQ_CST)
^ ~~~~~~
2 errors generated.
https://gitlab.freedesktop.org/gfx-ci/igt-ci-tags/-/jobs/535592
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