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1 //===-- DWARFDebugRangesList.cpp ------------------------------------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #include "llvm/DebugInfo/DWARF/DWARFDebugRangeList.h"
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11 #include "llvm/Support/Format.h"
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12 #include "llvm/Support/raw_ostream.h"
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13
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14 using namespace llvm;
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15
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16 void DWARFDebugRangeList::clear() {
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17 Offset = -1U;
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18 AddressSize = 0;
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19 Entries.clear();
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20 }
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21
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22 bool DWARFDebugRangeList::extract(DataExtractor data, uint32_t *offset_ptr) {
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23 clear();
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24 if (!data.isValidOffset(*offset_ptr))
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25 return false;
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26 AddressSize = data.getAddressSize();
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27 if (AddressSize != 4 && AddressSize != 8)
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28 return false;
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29 Offset = *offset_ptr;
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30 while (true) {
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31 RangeListEntry entry;
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32 uint32_t prev_offset = *offset_ptr;
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33 entry.StartAddress = data.getAddress(offset_ptr);
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34 entry.EndAddress = data.getAddress(offset_ptr);
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35 // Check that both values were extracted correctly.
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36 if (*offset_ptr != prev_offset + 2 * AddressSize) {
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37 clear();
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38 return false;
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39 }
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40 if (entry.isEndOfListEntry())
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41 break;
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42 Entries.push_back(entry);
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43 }
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44 return true;
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45 }
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46
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47 void DWARFDebugRangeList::dump(raw_ostream &OS) const {
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48 for (const RangeListEntry &RLE : Entries) {
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49 const char *format_str = (AddressSize == 4
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50 ? "%08x %08" PRIx64 " %08" PRIx64 "\n"
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51 : "%08x %016" PRIx64 " %016" PRIx64 "\n");
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52 OS << format(format_str, Offset, RLE.StartAddress, RLE.EndAddress);
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53 }
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54 OS << format("%08x <End of list>\n", Offset);
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55 }
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56
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57 DWARFAddressRangesVector
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58 DWARFDebugRangeList::getAbsoluteRanges(uint64_t BaseAddress) const {
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59 DWARFAddressRangesVector Res;
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60 for (const RangeListEntry &RLE : Entries) {
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61 if (RLE.isBaseAddressSelectionEntry(AddressSize)) {
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62 BaseAddress = RLE.EndAddress;
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63 } else {
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64 Res.push_back(std::make_pair(BaseAddress + RLE.StartAddress,
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65 BaseAddress + RLE.EndAddress));
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66 }
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67 }
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68 return Res;
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69 }
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