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D3D11_Groupshared tests for OOB GSM memory access

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Jake Turner committed 2026-10-23 13:01:29 +01:00
1 parent b4f1a9a0e7
commit 1432f8ba7c
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+27
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util/test/demos/d3d11/d3d11_groupshared.cpp
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@@ -36,6 +36,8 @@ RWStructuredBuffer<float> indata : register(u0);
RWStructuredBuffer<float4> outdata : register(u1);
groupshared float gsmData[MAX_THREADS];
groupshared float gsmSmallArray[MAX_THREADS];
groupshared float3 gsmSmall2DArray[3][MAX_THREADS];
cbuffer consts : register(b0)
{
@@ -115,6 +117,31 @@ void main(uint3 gid : SV_GroupThreadID)
outval.z = GetGSMValue(gid.x + 2);
outval.w = GetGSMValue(gid.x + 3);
}
else if (IsTest(3))
{
// Out of bounds GSM access should not crash
uint idx = gid.x;
uint oneu = (idx+1)/(idx+1);
uint zerou = oneu - 1;
uint idxOOB = idx * 2 + MAX_THREADS * oneu;
gsmSmallArray[idx] = (float)gid.x;
gsmSmall2DArray[zerou][idx].x = (float)gid.x;
gsmSmall2DArray[zerou][idx].y = (float)gid.x + 1.0;
gsmSmall2DArray[oneu][idx].x = (float)gid.x;
gsmSmall2DArray[oneu][idx].y = (float)gid.x + 1.0;
gsmSmall2DArray[oneu+oneu][idx].x = (float)gid.x;
gsmSmall2DArray[oneu+oneu][idx].y = (float)gid.x + 1.0;
gsmSmallArray[idxOOB] += (float)zerou;
gsmSmall2DArray[oneu][idxOOB].x += (float)zerou;
gsmSmall2DArray[oneu][idxOOB].y += (float)zerou;
outval.x = gsmSmallArray[idx + zerou];
outval.y = gsmSmallArray[idx + zerou];
outval.z = gsmSmall2DArray[oneu][idx + zerou].x;
outval.w = gsmSmall2DArray[oneu][idx + zerou].y;
}
outdata[gid.x] = outval;
}