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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===- DWARFDebugRangeList.h ------------------------------------*- C++ -*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |||
| 9 | #ifndef LLVM_DEBUGINFO_DWARF_DWARFDEBUGRANGELIST_H |
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| 10 | #define LLVM_DEBUGINFO_DWARF_DWARFDEBUGRANGELIST_H |
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| 11 | |||
| 12 | #include "llvm/DebugInfo/DWARF/DWARFAddressRange.h" |
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| 13 | #include <cstdint> |
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| 14 | #include <vector> |
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| 15 | |||
| 16 | namespace llvm { |
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| 17 | |||
| 18 | class raw_ostream; |
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| 19 | class DWARFDataExtractor; |
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| 20 | namespace object { |
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| 21 | struct SectionedAddress; |
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| 22 | } |
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| 23 | |||
| 24 | class DWARFDebugRangeList { |
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| 25 | public: |
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| 26 | struct RangeListEntry { |
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| 27 | /// A beginning address offset. This address offset has the size of an |
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| 28 | /// address and is relative to the applicable base address of the |
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| 29 | /// compilation unit referencing this range list. It marks the beginning |
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| 30 | /// of an address range. |
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| 31 | uint64_t StartAddress; |
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| 32 | /// An ending address offset. This address offset again has the size of |
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| 33 | /// an address and is relative to the applicable base address of the |
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| 34 | /// compilation unit referencing this range list. It marks the first |
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| 35 | /// address past the end of the address range. The ending address must |
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| 36 | /// be greater than or equal to the beginning address. |
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| 37 | uint64_t EndAddress; |
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| 38 | /// A section index this range belongs to. |
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| 39 | uint64_t SectionIndex; |
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| 40 | |||
| 41 | /// The end of any given range list is marked by an end of list entry, |
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| 42 | /// which consists of a 0 for the beginning address offset |
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| 43 | /// and a 0 for the ending address offset. |
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| 44 | bool isEndOfListEntry() const { |
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| 45 | return (StartAddress == 0) && (EndAddress == 0); |
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| 46 | } |
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| 47 | |||
| 48 | /// A base address selection entry consists of: |
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| 49 | /// 1. The value of the largest representable address offset |
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| 50 | /// (for example, 0xffffffff when the size of an address is 32 bits). |
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| 51 | /// 2. An address, which defines the appropriate base address for |
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| 52 | /// use in interpreting the beginning and ending address offsets of |
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| 53 | /// subsequent entries of the location list. |
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| 54 | bool isBaseAddressSelectionEntry(uint8_t AddressSize) const; |
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| 55 | }; |
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| 56 | |||
| 57 | private: |
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| 58 | /// Offset in .debug_ranges section. |
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| 59 | uint64_t Offset; |
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| 60 | uint8_t AddressSize; |
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| 61 | std::vector<RangeListEntry> Entries; |
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| 62 | |||
| 63 | public: |
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| 64 | DWARFDebugRangeList() { clear(); } |
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| 65 | |||
| 66 | void clear(); |
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| 67 | void dump(raw_ostream &OS) const; |
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| 68 | Error extract(const DWARFDataExtractor &data, uint64_t *offset_ptr); |
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| 69 | const std::vector<RangeListEntry> &getEntries() { return Entries; } |
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| 70 | |||
| 71 | /// getAbsoluteRanges - Returns absolute address ranges defined by this range |
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| 72 | /// list. Has to be passed base address of the compile unit referencing this |
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| 73 | /// range list. |
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| 74 | DWARFAddressRangesVector |
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| 75 | getAbsoluteRanges(std::optional<object::SectionedAddress> BaseAddr) const; |
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| 76 | }; |
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| 77 | |||
| 78 | } // end namespace llvm |
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| 79 | |||
| 80 | #endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGRANGELIST_H |