nsight Aftermath crash example (#2984)

* Small fixes and improvements around reflection tool.

* Make PrettyWriter printing a class.

* Aftermath crash demo WIP.

* Enable aftermath in test project.

* Setting failCount.

* Dumping out of source maps.

* Improve comments.
Simplify handling of compile products.

* Other small fixes to aftermath example.

* Added Emit SourceLocType.
Track sourcemap association meaning.
Improved documentation.

* Small improvements.

* Capture debug information for D3D11/D3D12/Vulkan.

* Enable debug info.

* Small improvements.

* Improve aftermath example README.md.

1 files changed, 81 insertions, 0 deletions

diff --git a/examples/nv-aftermath-example/shaders.slang b/examples/nv-aftermath-example/shaders.slang
new file mode 100644
index 000000000..61588dd49
--- /dev/null
+++ b/examples/nv-aftermath-example/shaders.slang
@@ -0,0 +1,81 @@
+// This shader is purposefully designed to be so slow it will cause a GPU timeout/crash.
+
+// Uniform data to be passed from application -> shader.
+cbuffer Uniforms
+{
+    float4x4 modelViewProjection;
+
+    // We want to make things fail so we can get an aftermath capture, 
+    // so lets have a count that makes things really slow.
+    int failCount;
+}
+
+// Per-vertex attributes to be assembled from bound vertex buffers.
+struct AssembledVertex
+{
+    float3	position : POSITION;
+    float3	color    : COLOR;
+};
+
+// Output of the vertex shader, and input to the fragment shader.
+struct CoarseVertex
+{
+    float3 color;
+};
+
+// Output of the fragment shader
+struct Fragment
+{
+    float4 color;
+};
+
+// Vertex  Shader
+
+struct VertexStageOutput
+{
+    CoarseVertex    coarseVertex    : CoarseVertex;
+    float4          sv_position     : SV_Position;
+};
+
+[shader("vertex")]
+VertexStageOutput vertexMain(
+    AssembledVertex assembledVertex)
+{
+    VertexStageOutput output;
+
+    float3 position = assembledVertex.position;
+    float3 color    = assembledVertex.color;
+
+    output.coarseVertex.color = color;
+    output.sv_position = mul(modelViewProjection, float4(position, 1.0));
+
+    return output;
+}
+
+// Fragment Shader
+
+[shader("fragment")]
+float4 fragmentMain(
+    CoarseVertex coarseVertex : CoarseVertex) : SV_Target
+{
+    float3 color = coarseVertex.color;
+
+    float factor = 0.0f;
+
+    // Waste lots of cycles
+    for (int i = 0; i < failCount; ++i)
+    {
+        factor += 1.0e-20 * sin(float(i & 0xffff));
+        factor += 1.0e-21 * cos(float(i & 0xfff) + 1.0);
+        factor += 1.0e-8f * tan(float(i & 0xfffff));
+    }
+
+    factor = abs(factor);
+
+    while (factor < 0.25)
+    {
+        factor += factor;
+    }
+
+    return float4(color, 1.0) * factor;
+}