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[ObjC] Use the appropriate integer size for entries in __objc_ivar #7083

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Jul 13, 2025
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[ObjC] Use the appropriate integer size for entries in __objc_ivar #7083

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7 changes: 5 additions & 2 deletions objectivec/objc.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1342,10 +1342,13 @@ void ObjCProcessor::PostProcessObjCSections(ObjCReader* reader)
{
auto start = ivars->GetStart();
auto end = ivars->GetEnd();
auto ivarSectionEntryTypeBuilder = new TypeBuilder(Type::IntegerType(8, false));
// The ivar section contains entries of type `long` for for all architectures
// except arm64, which uses `int` for the ivar offset.
size_t ivarOffsetSize = m_data->GetDefaultArchitecture()->GetName() == "aarch64" ? 4 : ptrSize;
auto ivarSectionEntryTypeBuilder = new TypeBuilder(Type::IntegerType(ivarOffsetSize, false));
ivarSectionEntryTypeBuilder->SetConst(true);
auto type = ivarSectionEntryTypeBuilder->Finalize();
for (view_ptr_t i = start; i < end; i += ptrSize)
for (view_ptr_t i = start; i < end; i += ivarOffsetSize)
{
m_data->DefineDataVariable(i, type);
}
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