1243789Sdim//===-- DWARFDebugRangeList.h -----------------------------------*- C++ -*-===// 2243789Sdim// 3243789Sdim// The LLVM Compiler Infrastructure 4243789Sdim// 5243789Sdim// This file is distributed under the University of Illinois Open Source 6243789Sdim// License. See LICENSE.TXT for details. 7243789Sdim// 8243789Sdim//===----------------------------------------------------------------------===// 9243789Sdim 10243789Sdim#ifndef LLVM_DEBUGINFO_DWARFDEBUGRANGELIST_H 11243789Sdim#define LLVM_DEBUGINFO_DWARFDEBUGRANGELIST_H 12243789Sdim 13243789Sdim#include "llvm/Support/DataExtractor.h" 14243789Sdim#include <vector> 15243789Sdim 16243789Sdimnamespace llvm { 17243789Sdim 18243789Sdimclass raw_ostream; 19243789Sdim 20243789Sdimclass DWARFDebugRangeList { 21243789Sdimpublic: 22243789Sdim struct RangeListEntry { 23243789Sdim // A beginning address offset. This address offset has the size of an 24243789Sdim // address and is relative to the applicable base address of the 25243789Sdim // compilation unit referencing this range list. It marks the beginning 26243789Sdim // of an address range. 27243789Sdim uint64_t StartAddress; 28243789Sdim // An ending address offset. This address offset again has the size of 29243789Sdim // an address and is relative to the applicable base address of the 30243789Sdim // compilation unit referencing this range list. It marks the first 31243789Sdim // address past the end of the address range. The ending address must 32243789Sdim // be greater than or equal to the beginning address. 33243789Sdim uint64_t EndAddress; 34243789Sdim // The end of any given range list is marked by an end of list entry, 35243789Sdim // which consists of a 0 for the beginning address offset 36243789Sdim // and a 0 for the ending address offset. 37243789Sdim bool isEndOfListEntry() const { 38243789Sdim return (StartAddress == 0) && (EndAddress == 0); 39243789Sdim } 40243789Sdim // A base address selection entry consists of: 41243789Sdim // 1. The value of the largest representable address offset 42243789Sdim // (for example, 0xffffffff when the size of an address is 32 bits). 43243789Sdim // 2. An address, which defines the appropriate base address for 44243789Sdim // use in interpreting the beginning and ending address offsets of 45243789Sdim // subsequent entries of the location list. 46243789Sdim bool isBaseAddressSelectionEntry(uint8_t AddressSize) const { 47243789Sdim assert(AddressSize == 4 || AddressSize == 8); 48243789Sdim if (AddressSize == 4) 49243789Sdim return StartAddress == -1U; 50243789Sdim else 51243789Sdim return StartAddress == -1ULL; 52243789Sdim } 53243789Sdim bool containsAddress(uint64_t BaseAddress, uint64_t Address) const { 54243789Sdim return (BaseAddress + StartAddress <= Address) && 55243789Sdim (Address < BaseAddress + EndAddress); 56243789Sdim } 57243789Sdim }; 58243789Sdim 59243789Sdimprivate: 60243789Sdim // Offset in .debug_ranges section. 61243789Sdim uint32_t Offset; 62243789Sdim uint8_t AddressSize; 63243789Sdim std::vector<RangeListEntry> Entries; 64243789Sdim 65243789Sdimpublic: 66243789Sdim DWARFDebugRangeList() { clear(); } 67243789Sdim void clear(); 68243789Sdim void dump(raw_ostream &OS) const; 69243789Sdim bool extract(DataExtractor data, uint32_t *offset_ptr); 70243789Sdim /// containsAddress - Returns true if range list contains the given 71243789Sdim /// address. Has to be passed base address of the compile unit that 72243789Sdim /// references this range list. 73243789Sdim bool containsAddress(uint64_t BaseAddress, uint64_t Address) const; 74243789Sdim}; 75243789Sdim 76243789Sdim} // namespace llvm 77243789Sdim 78243789Sdim#endif // LLVM_DEBUGINFO_DWARFDEBUGRANGELIST_H 79