-bool DWARFDebugInfoEntryMinimal::extract(const DWARFUnit *U,
- uint32_t *OffsetPtr) {
- DataExtractor DebugInfoData = U->getDebugInfoExtractor();
- const uint32_t UEndOffset = U->getNextUnitOffset();
- Offset = *OffsetPtr;
- if ((Offset >= UEndOffset) || !DebugInfoData.isValidOffset(Offset))
- return false;
- uint64_t AbbrCode = DebugInfoData.getULEB128(OffsetPtr);
- if (0 == AbbrCode) {
- // NULL debug tag entry.
- AbbrevDecl = NULL;
- return true;
- }
- AbbrevDecl = U->getAbbreviations()->getAbbreviationDeclaration(AbbrCode);
- if (0 == AbbrevDecl) {
- // Restore the original offset.
- *OffsetPtr = Offset;
- return false;
- }
- bool IsCompileUnitTag = (AbbrevDecl->getTag() == DW_TAG_compile_unit);
- if (IsCompileUnitTag)
- const_cast<DWARFUnit *>(U)->setBaseAddress(0);
-
- // Skip all data in the .debug_info for the attributes
- for (uint32_t i = 0, n = AbbrevDecl->getNumAttributes(); i < n; ++i) {
- uint16_t Attr = AbbrevDecl->getAttrByIndex(i);
- uint16_t Form = AbbrevDecl->getFormByIndex(i);
-
- if (IsCompileUnitTag &&
- ((Attr == DW_AT_entry_pc) || (Attr == DW_AT_low_pc))) {
- DWARFFormValue FormValue(Form);
- if (FormValue.extractValue(DebugInfoData, OffsetPtr, U)) {
- if (Attr == DW_AT_low_pc || Attr == DW_AT_entry_pc) {
- Optional<uint64_t> BaseAddr = FormValue.getAsAddress(U);
- if (BaseAddr.hasValue())
- const_cast<DWARFUnit *>(U)->setBaseAddress(BaseAddr.getValue());
- }
- }
- } else if (!DWARFFormValue::skipValue(Form, DebugInfoData, OffsetPtr, U)) {
- // Restore the original offset.
- *OffsetPtr = Offset;
- return false;
- }
- }
- return true;
-}
-