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[Runtime] Zero out the entire witness table during instantiation. #32367

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Merged
merged 1 commit into from
Jun 15, 2020
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[Runtime] Zero out the entire witness table during instantiation. #32367

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4 changes: 2 additions & 2 deletions stdlib/public/runtime/Metadata.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -4537,8 +4537,8 @@ WitnessTableCacheEntry::allocate(
// Find the allocation.
void **fullTable = reinterpret_cast<void**>(this + 1);

// Zero out the private storage area.
memset(fullTable, 0, privateSizeInWords * sizeof(void*));
// Zero out the witness table.
memset(fullTable, 0, getWitnessTableSize(conformance));

// Advance the address point; the private storage area is accessed via
// negative offsets.
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