+static const DWARFFormValue::FormClass DWARF4FormClasses[] = {
+ DWARFFormValue::FC_Unknown, // 0x0
+ DWARFFormValue::FC_Address, // 0x01 DW_FORM_addr
+ DWARFFormValue::FC_Unknown, // 0x02 unused
+ DWARFFormValue::FC_Block, // 0x03 DW_FORM_block2
+ DWARFFormValue::FC_Block, // 0x04 DW_FORM_block4
+ DWARFFormValue::FC_Constant, // 0x05 DW_FORM_data2
+ // --- These can be FC_SectionOffset in DWARF3 and below:
+ DWARFFormValue::FC_Constant, // 0x06 DW_FORM_data4
+ DWARFFormValue::FC_Constant, // 0x07 DW_FORM_data8
+ // ---
+ DWARFFormValue::FC_String, // 0x08 DW_FORM_string
+ DWARFFormValue::FC_Block, // 0x09 DW_FORM_block
+ DWARFFormValue::FC_Block, // 0x0a DW_FORM_block1
+ DWARFFormValue::FC_Constant, // 0x0b DW_FORM_data1
+ DWARFFormValue::FC_Flag, // 0x0c DW_FORM_flag
+ DWARFFormValue::FC_Constant, // 0x0d DW_FORM_sdata
+ DWARFFormValue::FC_String, // 0x0e DW_FORM_strp
+ DWARFFormValue::FC_Constant, // 0x0f DW_FORM_udata
+ DWARFFormValue::FC_Reference, // 0x10 DW_FORM_ref_addr
+ DWARFFormValue::FC_Reference, // 0x11 DW_FORM_ref1
+ DWARFFormValue::FC_Reference, // 0x12 DW_FORM_ref2
+ DWARFFormValue::FC_Reference, // 0x13 DW_FORM_ref4
+ DWARFFormValue::FC_Reference, // 0x14 DW_FORM_ref8
+ DWARFFormValue::FC_Reference, // 0x15 DW_FORM_ref_udata
+ DWARFFormValue::FC_Indirect, // 0x16 DW_FORM_indirect
+ DWARFFormValue::FC_SectionOffset, // 0x17 DW_FORM_sec_offset
+ DWARFFormValue::FC_Exprloc, // 0x18 DW_FORM_exprloc
+ DWARFFormValue::FC_Flag, // 0x19 DW_FORM_flag_present
+};
+
+bool DWARFFormValue::isFormClass(DWARFFormValue::FormClass FC) const {
+ // First, check DWARF4 form classes.
+ if (Form < ArrayRef<FormClass>(DWARF4FormClasses).size() &&
+ DWARF4FormClasses[Form] == FC)
+ return true;
+ // Check DW_FORM_ref_sig8 from DWARF4.
+ if (Form == DW_FORM_ref_sig8)
+ return (FC == FC_Reference);
+ // Check for some DWARF5 forms.
+ if (Form == DW_FORM_GNU_addr_index)
+ return (FC == FC_Address);
+ if (Form == DW_FORM_GNU_str_index)
+ return (FC == FC_String);
+ // In DWARF3 DW_FORM_data4 and DW_FORM_data8 served also as a section offset.
+ // Don't check for DWARF version here, as some producers may still do this
+ // by mistake.
+ if ((Form == DW_FORM_data4 || Form == DW_FORM_data8) &&
+ FC == FC_SectionOffset)
+ return true;
+ return false;
+}
+
+bool DWARFFormValue::extractValue(DataExtractor data, uint32_t *offset_ptr,
+ const DWARFUnit *cu) {