video_core: Use sampler IDs instead pointers in the pipeline config

The previous approach of storing pointers returned by `GetGraphicsSampler`/`GetComputeSampler` caused UB, as these functions can cause reallocation of the sampler slot vector and therefore invalidate the pointers

3 files changed, 9 insertions, 8 deletions

diff --git a/src/video_core/renderer_vulkan/pipeline_helper.h b/src/video_core/renderer_vulkan/pipeline_helper.h
index 0a9dce937..71c783709 100644
--- a/src/video_core/renderer_vulkan/pipeline_helper.h
+++ b/src/video_core/renderer_vulkan/pipeline_helper.h
@@ -178,7 +178,7 @@ public:
 inline void PushImageDescriptors(TextureCache& texture_cache,
                                  GuestDescriptorQueue& guest_descriptor_queue,
                                  const Shader::Info& info, RescalingPushConstant& rescaling,
-                                 const Sampler**& samplers,
+                                 const VideoCommon::SamplerId*& samplers,
                                  const VideoCommon::ImageViewInOut*& views) {
     const u32 num_texture_buffers = Shader::NumDescriptors(info.texture_buffer_descriptors);
     const u32 num_image_buffers = Shader::NumDescriptors(info.image_buffer_descriptors);
@@ -187,9 +187,10 @@ inline void PushImageDescriptors(TextureCache& texture_cache,
     for (const auto& desc : info.texture_descriptors) {
         for (u32 index = 0; index < desc.count; ++index) {
             const VideoCommon::ImageViewId image_view_id{(views++)->id};
+            const VideoCommon::SamplerId sampler_id{*(samplers++)};
             ImageView& image_view{texture_cache.GetImageView(image_view_id)};
             const VkImageView vk_image_view{image_view.Handle(desc.type)};
-            const Sampler& sampler{**(samplers++)};
+            const Sampler& sampler{texture_cache.GetSampler(sampler_id)};
             const bool use_fallback_sampler{sampler.HasAddedAnisotropy() &&
                                             !image_view.SupportsAnisotropy()};
             const VkSampler vk_sampler{use_fallback_sampler ? sampler.HandleWithDefaultAnisotropy()
diff --git a/src/video_core/renderer_vulkan/vk_compute_pipeline.cpp b/src/video_core/renderer_vulkan/vk_compute_pipeline.cpp
index eb292dc34..73e585c2b 100644
--- a/src/video_core/renderer_vulkan/vk_compute_pipeline.cpp
+++ b/src/video_core/renderer_vulkan/vk_compute_pipeline.cpp
@@ -115,7 +115,7 @@ void ComputePipeline::Configure(Tegra::Engines::KeplerCompute& kepler_compute,
 
     static constexpr size_t max_elements = 64;
     boost::container::static_vector<VideoCommon::ImageViewInOut, max_elements> views;
-    boost::container::static_vector<const Sampler*, max_elements> samplers;
+    boost::container::static_vector<VideoCommon::SamplerId, max_elements> samplers;
 
     const auto& qmd{kepler_compute.launch_description};
     const auto& cbufs{qmd.const_buffer_config};
@@ -160,7 +160,7 @@ void ComputePipeline::Configure(Tegra::Engines::KeplerCompute& kepler_compute,
             const auto handle{read_handle(desc, index)};
             views.push_back({handle.first});
 
-            Sampler* const sampler = texture_cache.GetComputeSampler(handle.second);
+            VideoCommon::SamplerId sampler = texture_cache.GetComputeSamplerId(handle.second);
             samplers.push_back(sampler);
         }
     }
@@ -192,7 +192,7 @@ void ComputePipeline::Configure(Tegra::Engines::KeplerCompute& kepler_compute,
     buffer_cache.BindHostComputeBuffers();
 
     RescalingPushConstant rescaling;
-    const Sampler** samplers_it{samplers.data()};
+    const VideoCommon::SamplerId* samplers_it{samplers.data()};
     const VideoCommon::ImageViewInOut* views_it{views.data()};
     PushImageDescriptors(texture_cache, guest_descriptor_queue, info, rescaling, samplers_it,
                          views_it);
diff --git a/src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp b/src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp
index e6e004cb6..c1595642e 100644
--- a/src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp
+++ b/src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp
@@ -298,7 +298,7 @@ void GraphicsPipeline::AddTransition(GraphicsPipeline* transition) {
 template <typename Spec>
 void GraphicsPipeline::ConfigureImpl(bool is_indexed) {
     std::array<VideoCommon::ImageViewInOut, MAX_IMAGE_ELEMENTS> views;
-    std::array<const Sampler*, MAX_IMAGE_ELEMENTS> samplers;
+    std::array<VideoCommon::SamplerId, MAX_IMAGE_ELEMENTS> samplers;
     size_t sampler_index{};
     size_t view_index{};
 
@@ -367,7 +367,7 @@ void GraphicsPipeline::ConfigureImpl(bool is_indexed) {
                 const auto handle{read_handle(desc, index)};
                 views[view_index++] = {handle.first};
 
-                Sampler* const sampler{texture_cache.GetGraphicsSampler(handle.second)};
+                VideoCommon::SamplerId sampler{texture_cache.GetGraphicsSamplerId(handle.second)};
                 samplers[sampler_index++] = sampler;
             }
         }
@@ -453,7 +453,7 @@ void GraphicsPipeline::ConfigureImpl(bool is_indexed) {
 
     RescalingPushConstant rescaling;
     RenderAreaPushConstant render_area;
-    const Sampler** samplers_it{samplers.data()};
+    const VideoCommon::SamplerId* samplers_it{samplers.data()};
     const VideoCommon::ImageViewInOut* views_it{views.data()};
     const auto prepare_stage{[&](size_t stage) LAMBDA_FORCEINLINE {
         buffer_cache.BindHostStageBuffers(stage);