[GC] Fix trapping on array.new_data of dropped segments of offset > 0 #7124
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tlively
reviewed
Nov 27, 2024
src/wasm-interpreter.h
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| @@ -4023,7 +4023,7 @@ class ModuleRunnerBase : public ExpressionRunner<SubType> { | |||
| const auto& seg = *wasm.getDataSegment(curr->segment); | |||
| auto elemBytes = element.getByteSize(); | |||
| auto end = offset + size * elemBytes; | |||
| if ((size != 0ull && droppedDataSegments.count(curr->segment)) || | |||
| if ((offset + size > 0 && droppedDataSegments.count(curr->segment)) || | |||
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It looks like we should check for overflow as well.
tlively
approved these changes
Nov 27, 2024
Co-authored-by: Thomas Lively <tlively123@gmail.com>
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Even if the size is 0, if the offset is > 0 then we should trap.
@tlively Is it expected there are no spec tests for this combination of GC+bulk memory?