1283625Sdim//===-- DWARFDebugLoc.cpp -------------------------------------------------===// 2283625Sdim// 3283625Sdim// The LLVM Compiler Infrastructure 4283625Sdim// 5283625Sdim// This file is distributed under the University of Illinois Open Source 6283625Sdim// License. See LICENSE.TXT for details. 7283625Sdim// 8283625Sdim//===----------------------------------------------------------------------===// 9283625Sdim 10283625Sdim#include "llvm/DebugInfo/DWARF/DWARFDebugLoc.h" 11283625Sdim#include "llvm/Support/Compiler.h" 12283625Sdim#include "llvm/Support/Dwarf.h" 13283625Sdim#include "llvm/Support/Format.h" 14283625Sdim#include "llvm/Support/raw_ostream.h" 15283625Sdim 16283625Sdimusing namespace llvm; 17283625Sdim 18283625Sdimvoid DWARFDebugLoc::dump(raw_ostream &OS) const { 19283625Sdim for (const LocationList &L : Locations) { 20283625Sdim OS << format("0x%8.8x: ", L.Offset); 21283625Sdim const unsigned Indent = 12; 22283625Sdim for (const Entry &E : L.Entries) { 23283625Sdim if (&E != L.Entries.begin()) 24283625Sdim OS.indent(Indent); 25283625Sdim OS << "Beginning address offset: " << format("0x%016" PRIx64, E.Begin) 26283625Sdim << '\n'; 27283625Sdim OS.indent(Indent) << " Ending address offset: " 28283625Sdim << format("0x%016" PRIx64, E.End) << '\n'; 29283625Sdim OS.indent(Indent) << " Location description: "; 30283625Sdim for (unsigned char Loc : E.Loc) { 31283625Sdim OS << format("%2.2x ", Loc); 32283625Sdim } 33283625Sdim OS << "\n\n"; 34283625Sdim } 35283625Sdim } 36283625Sdim} 37283625Sdim 38283625Sdimvoid DWARFDebugLoc::parse(DataExtractor data, unsigned AddressSize) { 39283625Sdim uint32_t Offset = 0; 40283625Sdim while (data.isValidOffset(Offset+AddressSize-1)) { 41283625Sdim Locations.resize(Locations.size() + 1); 42283625Sdim LocationList &Loc = Locations.back(); 43283625Sdim Loc.Offset = Offset; 44283625Sdim // 2.6.2 Location Lists 45283625Sdim // A location list entry consists of: 46283625Sdim while (true) { 47283625Sdim Entry E; 48283625Sdim RelocAddrMap::const_iterator AI = RelocMap.find(Offset); 49283625Sdim // 1. A beginning address offset. ... 50283625Sdim E.Begin = data.getUnsigned(&Offset, AddressSize); 51283625Sdim if (AI != RelocMap.end()) 52283625Sdim E.Begin += AI->second.second; 53283625Sdim 54283625Sdim AI = RelocMap.find(Offset); 55283625Sdim // 2. An ending address offset. ... 56283625Sdim E.End = data.getUnsigned(&Offset, AddressSize); 57283625Sdim if (AI != RelocMap.end()) 58283625Sdim E.End += AI->second.second; 59283625Sdim 60283625Sdim // The end of any given location list is marked by an end of list entry, 61283625Sdim // which consists of a 0 for the beginning address offset and a 0 for the 62283625Sdim // ending address offset. 63283625Sdim if (E.Begin == 0 && E.End == 0) 64283625Sdim break; 65283625Sdim 66283625Sdim unsigned Bytes = data.getU16(&Offset); 67283625Sdim // A single location description describing the location of the object... 68283625Sdim StringRef str = data.getData().substr(Offset, Bytes); 69283625Sdim Offset += Bytes; 70283625Sdim E.Loc.append(str.begin(), str.end()); 71283625Sdim Loc.Entries.push_back(std::move(E)); 72283625Sdim } 73283625Sdim } 74283625Sdim if (data.isValidOffset(Offset)) 75283625Sdim llvm::errs() << "error: failed to consume entire .debug_loc section\n"; 76283625Sdim} 77283625Sdim 78283625Sdimvoid DWARFDebugLocDWO::parse(DataExtractor data) { 79283625Sdim uint32_t Offset = 0; 80283625Sdim while (data.isValidOffset(Offset)) { 81283625Sdim Locations.resize(Locations.size() + 1); 82283625Sdim LocationList &Loc = Locations.back(); 83283625Sdim Loc.Offset = Offset; 84283625Sdim dwarf::LocationListEntry Kind; 85283625Sdim while ((Kind = static_cast<dwarf::LocationListEntry>( 86283625Sdim data.getU8(&Offset))) != dwarf::DW_LLE_end_of_list_entry) { 87283625Sdim 88283625Sdim if (Kind != dwarf::DW_LLE_start_length_entry) { 89283625Sdim llvm::errs() << "error: dumping support for LLE of kind " << (int)Kind 90283625Sdim << " not implemented\n"; 91283625Sdim return; 92283625Sdim } 93283625Sdim 94283625Sdim Entry E; 95283625Sdim 96283625Sdim E.Start = data.getULEB128(&Offset); 97283625Sdim E.Length = data.getU32(&Offset); 98283625Sdim 99283625Sdim unsigned Bytes = data.getU16(&Offset); 100283625Sdim // A single location description describing the location of the object... 101283625Sdim StringRef str = data.getData().substr(Offset, Bytes); 102283625Sdim Offset += Bytes; 103283625Sdim E.Loc.resize(str.size()); 104283625Sdim std::copy(str.begin(), str.end(), E.Loc.begin()); 105283625Sdim 106283625Sdim Loc.Entries.push_back(std::move(E)); 107283625Sdim } 108283625Sdim } 109283625Sdim} 110283625Sdim 111283625Sdimvoid DWARFDebugLocDWO::dump(raw_ostream &OS) const { 112283625Sdim for (const LocationList &L : Locations) { 113283625Sdim OS << format("0x%8.8x: ", L.Offset); 114283625Sdim const unsigned Indent = 12; 115283625Sdim for (const Entry &E : L.Entries) { 116283625Sdim if (&E != L.Entries.begin()) 117283625Sdim OS.indent(Indent); 118283625Sdim OS << "Beginning address index: " << E.Start << '\n'; 119283625Sdim OS.indent(Indent) << " Length: " << E.Length << '\n'; 120283625Sdim OS.indent(Indent) << " Location description: "; 121283625Sdim for (unsigned char Loc : E.Loc) 122283625Sdim OS << format("%2.2x ", Loc); 123283625Sdim OS << "\n\n"; 124283625Sdim } 125283625Sdim } 126283625Sdim} 127283625Sdim 128