Francisco Casas : tests/vkd3d-shader: Set uninitialized uniforms to a value.

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: 0f9f5269e9c9cfb9882cda3c712f820d6f35295b
URL:    https://gitlab.winehq.org/wine/vkd3d/-/commit/0f9f5269e9c9cfb9882cda3c712f82...

Author: Francisco Casas <fcasas(a)codeweavers.com>
Date:   Wed Jan 31 15:21:23 2024 -0300

tests/vkd3d-shader: Set uninitialized uniforms to a value.

Avoids a potential source of non-determinism because the padding bytes
between uniforms could be left uninitialized.

---

 tests/shader_runner.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tests/shader_runner.c b/tests/shader_runner.c
index fe5ee597..866fd5d4 100644
--- a/tests/shader_runner.c
+++ b/tests/shader_runner.c
@@ -551,9 +551,13 @@ static void set_resource(struct shader_runner *runner, struct resource *resource
 
 static void set_uniforms(struct shader_runner *runner, size_t offset, size_t count, const void *uniforms)
 {
+    size_t initial_count = runner->uniform_count;
+
     runner->uniform_count = align(max(runner->uniform_count, offset + count), 4);
     vkd3d_array_reserve((void **)&runner->uniforms, &runner->uniform_capacity,
             runner->uniform_count, sizeof(*runner->uniforms));
+    memset(runner->uniforms + initial_count, 127,
+            (runner->uniform_count - initial_count) * sizeof(*runner->uniforms));
     memcpy(runner->uniforms + offset, uniforms, count * sizeof(*runner->uniforms));
 }