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/DebugInfo/DWARF/DWARFAddressRange.h"
14 #include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
24 class DWARFDebugRangeList {
26 struct RangeListEntry {
27 /// A beginning address offset. This address offset has the size of an
28 /// address and is relative to the applicable base address of the
29 /// compilation unit referencing this range list. It marks the beginning
30 /// of an address range.
31 uint64_t StartAddress;
32 /// An ending address offset. This address offset again has the size of
33 /// an address and is relative to the applicable base address of the
34 /// compilation unit referencing this range list. It marks the first
35 /// address past the end of the address range. The ending address must
36 /// be greater than or equal to the beginning address.
38 /// A section index this range belongs to.
39 uint64_t SectionIndex;
41 /// The end of any given range list is marked by an end of list entry,
42 /// which consists of a 0 for the beginning address offset
43 /// and a 0 for the ending address offset.
44 bool isEndOfListEntry() const {
45 return (StartAddress == 0) && (EndAddress == 0);
48 /// A base address selection entry consists of:
49 /// 1. The value of the largest representable address offset
50 /// (for example, 0xffffffff when the size of an address is 32 bits).
51 /// 2. An address, which defines the appropriate base address for
52 /// use in interpreting the beginning and ending address offsets of
53 /// subsequent entries of the location list.
54 bool isBaseAddressSelectionEntry(uint8_t AddressSize) const {
55 assert(AddressSize == 4 || AddressSize == 8);
57 return StartAddress == -1U;
59 return StartAddress == -1ULL;
64 /// Offset in .debug_ranges section.
67 std::vector<RangeListEntry> Entries;
70 DWARFDebugRangeList() { clear(); }
73 void dump(raw_ostream &OS) const;
74 Error extract(const DWARFDataExtractor &data, uint32_t *offset_ptr);
75 const std::vector<RangeListEntry> &getEntries() { return Entries; }
77 /// getAbsoluteRanges - Returns absolute address ranges defined by this range
78 /// list. Has to be passed base address of the compile unit referencing this
80 DWARFAddressRangesVector
81 getAbsoluteRanges(llvm::Optional<BaseAddress> BaseAddr) const;
84 } // end namespace llvm
86 #endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGRANGELIST_H