================
@@ -21,6 +27,49 @@ using namespace lldb_private;
using namespace lldb_private::plugin::dwarf;
using namespace llvm::dwarf;
+static std::optional<uint64_t>
+EvaluateUnsignedArrayProperty(const DWARFFormValue &form_value,
+ const DWARFDIE &parent_die,
+ const ExecutionContext *exe_ctx) {
+ // Array properties may be encoded directly as constants.
+ if (std::optional<uint64_t> value = form_value.getAsUnsignedConstant())
+ return value;
+ if (std::optional<int64_t> value = form_value.getAsSignedConstant())
+ if (*value >= 0)
+ return *value;
+
+ // Otherwise, evaluate expression blocks in the current execution context.
+ // Without a context there is no frame/register state to use for operations
+ // such as DW_OP_fbreg.
+ if (!DWARFFormValue::IsBlockForm(form_value.Form()) || !exe_ctx)
+ return std::nullopt;
+
+ DWARFUnit *unit = parent_die.GetCU();
+ SymbolFileDWARF *dwarf = parent_die.GetDWARF();
+ if (!unit || !dwarf || !dwarf->GetObjectFile())
+ return std::nullopt;
+
+ lldb::RegisterContextSP reg_ctx_sp;
+ if (lldb::StackFrameSP frame_sp = exe_ctx->GetFrameSP())
+ reg_ctx_sp = frame_sp->GetRegisterContext();
+
+ DataExtractor data(form_value.BlockData(), form_value.Unsigned(),
+ unit->GetByteOrder(), unit->GetAddressByteSize());
+ ExecutionContext exe_ctx_copy(*exe_ctx);
+
+ // Evaluate the DWARF expression to obtain the dynamic property value.
+ llvm::Expected<Value> result = DWARFExpression::Evaluate(
+ &exe_ctx_copy, reg_ctx_sp.get(), dwarf->GetObjectFile()->GetModule(),
+ data, unit, eRegisterKindDWARF,
+ /*initial_value_ptr=*/nullptr, /*object_address_ptr=*/nullptr);
+ if (!result) {
+ llvm::consumeError(result.takeError());
----------------
Michael137 wrote:
lets `LLDB_LOG_ERROR` instead of dropping it
https://github.com/llvm/llvm-project/pull/204119
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