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[NativeAOT] Always zero-init if object contains pointers #100265

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merged 1 commit into from
Mar 26, 2024
Merged

[NativeAOT] Always zero-init if object contains pointers #100265

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6 changes: 6 additions & 0 deletions src/coreclr/nativeaot/Runtime/GCHelpers.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -476,6 +476,12 @@ static Object* GcAllocInternal(MethodTable* pEEType, uint32_t uFlags, uintptr_t
ASSERT(!pThread->IsDoNotTriggerGcSet());
ASSERT(pThread->IsCurrentThreadInCooperativeMode());

if (pEEType->ContainsPointers())
{
uFlags |= GC_ALLOC_CONTAINS_REF;
uFlags &= ~GC_ALLOC_ZEROING_OPTIONAL;
}

size_t cbSize = pEEType->GetBaseSize();

if (pEEType->HasComponentSize())
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2 changes: 2 additions & 0 deletions src/libraries/System.Runtime/tests/System.Runtime.Tests/System/GCTests.cs
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Expand Up @@ -1099,6 +1099,8 @@ private unsafe static void AllocateArrayPinned_ManagedValueType_CanRoundtripThro
byte* pointer = (byte*)Unsafe.AsPointer(ref array[0]); // Unsafe.AsPointer is safe since array is pinned
var size = Unsafe.SizeOf<EmbeddedValueType<string>>();

GC.Collect();

for(int i = 0; i < length; ++i)
{
int idx = rng.Next(length);
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