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Unify the return value of GetByteSize to an llvm::Optional<uint64_t> (NFC-ish)

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This cleanup patch unifies all methods called GetByteSize() in the
ValueObject hierarchy to return an optional, like the methods in
CompilerType do. This means fewer magic 0 values, which could fix bugs
down the road in languages where types can have a size of zero, such
as Swift and C (but not C++).

Differential Revision: https://reviews.llvm.org/D84285
This commit is contained in:
Adrian Prantl
2020-07-25 08:27:21 -07:00
parent c09a10845b
commit 1d9b860fb6
24 changed files with 62 additions and 57 deletions
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6
lldb/source/Target/StackFrame.cpp
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@@ -1408,7 +1408,7 @@ ValueObjectSP GetValueForOffset(StackFrame &frame, ValueObjectSP &parent,
}
int64_t child_offset = child_sp->GetByteOffset();
int64_t child_size = child_sp->GetByteSize();
int64_t child_size = child_sp->GetByteSize().getValueOr(0);
if (offset >= child_offset && offset < (child_offset + child_size)) {
return GetValueForOffset(frame, child_sp, offset - child_offset);
@@ -1441,8 +1441,8 @@ ValueObjectSP GetValueForDereferincingOffset(StackFrame &frame,
}
if (offset >= 0 && uint64_t(offset) >= pointee->GetByteSize()) {
int64_t index = offset / pointee->GetByteSize();
offset = offset % pointee->GetByteSize();
int64_t index = offset / pointee->GetByteSize().getValueOr(1);
offset = offset % pointee->GetByteSize().getValueOr(1);
const bool can_create = true;
pointee = base->GetSyntheticArrayMember(index, can_create);
}