1 //===-- DWARFLocationList.cpp -----------------------------------*- C++ -*-===// 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 "DWARFLocationList.h" 11 12 #include "lldb/Core/Stream.h" 13 14 #include "DWARFCompileUnit.h" 15 #include "DWARFDebugInfo.h" 16 #include "DWARFLocationDescription.h" 17 18 using namespace lldb_private; 19 20 dw_offset_t 21 DWARFLocationList::Dump(Stream &s, const DWARFCompileUnit* cu, const DataExtractor& debug_loc_data, lldb::offset_t offset) 22 { 23 uint64_t start_addr, end_addr; 24 uint32_t addr_size = DWARFCompileUnit::GetAddressByteSize(cu); 25 s.SetAddressByteSize(DWARFCompileUnit::GetAddressByteSize(cu)); 26 dw_addr_t base_addr = cu ? cu->GetBaseAddress() : 0; 27 while (debug_loc_data.ValidOffset(offset)) 28 { 29 start_addr = debug_loc_data.GetMaxU64(&offset,addr_size); 30 end_addr = debug_loc_data.GetMaxU64(&offset,addr_size); 31 32 if (start_addr == 0 && end_addr == 0) 33 break; 34 35 s.PutCString("\n "); 36 s.Indent(); 37 if (cu) 38 s.AddressRange (start_addr + base_addr, 39 end_addr + base_addr, 40 cu->GetAddressByteSize(), 41 NULL, 42 ": "); 43 uint32_t loc_length = debug_loc_data.GetU16(&offset); 44 45 DataExtractor locationData(debug_loc_data, offset, loc_length); 46 // if ( dump_flags & DWARFDebugInfo::eDumpFlag_Verbose ) *ostrm_ptr << " ( "; 47 print_dwarf_expression (s, locationData, addr_size, 4, false); 48 offset += loc_length; 49 } 50 51 return offset; 52 } 53 54 bool 55 DWARFLocationList::Extract(const DataExtractor& debug_loc_data, lldb::offset_t* offset_ptr, DataExtractor& location_list_data) 56 { 57 // Initialize with no data just in case we don't find anything 58 location_list_data.Clear(); 59 60 size_t loc_list_length = Size(debug_loc_data, *offset_ptr); 61 if (loc_list_length > 0) 62 { 63 location_list_data.SetData(debug_loc_data, *offset_ptr, loc_list_length); 64 *offset_ptr += loc_list_length; 65 return true; 66 } 67 68 return false; 69 } 70 71 size_t 72 DWARFLocationList::Size(const DataExtractor& debug_loc_data, lldb::offset_t offset) 73 { 74 const dw_offset_t debug_loc_offset = offset; 75 76 while (debug_loc_data.ValidOffset(offset)) 77 { 78 dw_addr_t start_addr = debug_loc_data.GetAddress(&offset); 79 dw_addr_t end_addr = debug_loc_data.GetAddress(&offset); 80 81 if (start_addr == 0 && end_addr == 0) 82 break; 83 84 uint16_t loc_length = debug_loc_data.GetU16(&offset); 85 offset += loc_length; 86 } 87 88 if (offset > debug_loc_offset) 89 return offset - debug_loc_offset; 90 return 0; 91 } 92 93 94 95
