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