1 //===- DWARFDebugRangeList.h ------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef LLVM_DEBUGINFO_DWARF_DWARFDEBUGRANGELIST_H
11 #define LLVM_DEBUGINFO_DWARF_DWARFDEBUGRANGELIST_H
13 #include "llvm/Support/DataExtractor.h"
14 #include "llvm/DebugInfo/DWARF/DWARFRelocMap.h"
25 struct DWARFAddressRange {
30 /// DWARFAddressRangesVector - represents a set of absolute address ranges.
31 typedef std::vector<DWARFAddressRange> DWARFAddressRangesVector;
33 class DWARFDebugRangeList {
35 struct RangeListEntry {
36 /// A beginning address offset. This address offset has the size of an
37 /// address and is relative to the applicable base address of the
38 /// compilation unit referencing this range list. It marks the beginning
39 /// of an address range.
40 uint64_t StartAddress;
41 /// An ending address offset. This address offset again has the size of
42 /// an address and is relative to the applicable base address of the
43 /// compilation unit referencing this range list. It marks the first
44 /// address past the end of the address range. The ending address must
45 /// be greater than or equal to the beginning address.
48 /// The end of any given range list is marked by an end of list entry,
49 /// which consists of a 0 for the beginning address offset
50 /// and a 0 for the ending address offset.
51 bool isEndOfListEntry() const {
52 return (StartAddress == 0) && (EndAddress == 0);
55 /// A base address selection entry consists of:
56 /// 1. The value of the largest representable address offset
57 /// (for example, 0xffffffff when the size of an address is 32 bits).
58 /// 2. An address, which defines the appropriate base address for
59 /// use in interpreting the beginning and ending address offsets of
60 /// subsequent entries of the location list.
61 bool isBaseAddressSelectionEntry(uint8_t AddressSize) const {
62 assert(AddressSize == 4 || AddressSize == 8);
64 return StartAddress == -1U;
66 return StartAddress == -1ULL;
71 /// Offset in .debug_ranges section.
74 std::vector<RangeListEntry> Entries;
77 DWARFDebugRangeList() { clear(); }
80 void dump(raw_ostream &OS) const;
81 bool extract(DataExtractor data, uint32_t *offset_ptr, const RelocAddrMap& Relocs);
82 const std::vector<RangeListEntry> &getEntries() { return Entries; }
84 /// getAbsoluteRanges - Returns absolute address ranges defined by this range
85 /// list. Has to be passed base address of the compile unit referencing this
87 DWARFAddressRangesVector getAbsoluteRanges(uint64_t BaseAddress) const;
90 } // end namespace llvm
92 #endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGRANGELIST_H