| //===-- DWARFDebugRangeList.h -----------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_DEBUGINFO_DWARFDEBUGRANGELIST_H |
| #define LLVM_LIB_DEBUGINFO_DWARFDEBUGRANGELIST_H |
| |
| #include "llvm/Support/DataExtractor.h" |
| #include <vector> |
| |
| namespace llvm { |
| |
| class raw_ostream; |
| |
| /// DWARFAddressRangesVector - represents a set of absolute address ranges. |
| typedef std::vector<std::pair<uint64_t, uint64_t>> DWARFAddressRangesVector; |
| |
| class DWARFDebugRangeList { |
| public: |
| struct RangeListEntry { |
| // A beginning address offset. This address offset has the size of an |
| // address and is relative to the applicable base address of the |
| // compilation unit referencing this range list. It marks the beginning |
| // of an address range. |
| uint64_t StartAddress; |
| // An ending address offset. This address offset again has the size of |
| // an address and is relative to the applicable base address of the |
| // compilation unit referencing this range list. It marks the first |
| // address past the end of the address range. The ending address must |
| // be greater than or equal to the beginning address. |
| uint64_t EndAddress; |
| // The end of any given range list is marked by an end of list entry, |
| // which consists of a 0 for the beginning address offset |
| // and a 0 for the ending address offset. |
| bool isEndOfListEntry() const { |
| return (StartAddress == 0) && (EndAddress == 0); |
| } |
| // A base address selection entry consists of: |
| // 1. The value of the largest representable address offset |
| // (for example, 0xffffffff when the size of an address is 32 bits). |
| // 2. An address, which defines the appropriate base address for |
| // use in interpreting the beginning and ending address offsets of |
| // subsequent entries of the location list. |
| bool isBaseAddressSelectionEntry(uint8_t AddressSize) const { |
| assert(AddressSize == 4 || AddressSize == 8); |
| if (AddressSize == 4) |
| return StartAddress == -1U; |
| else |
| return StartAddress == -1ULL; |
| } |
| }; |
| |
| private: |
| // Offset in .debug_ranges section. |
| uint32_t Offset; |
| uint8_t AddressSize; |
| std::vector<RangeListEntry> Entries; |
| |
| public: |
| DWARFDebugRangeList() { clear(); } |
| void clear(); |
| void dump(raw_ostream &OS) const; |
| bool extract(DataExtractor data, uint32_t *offset_ptr); |
| const std::vector<RangeListEntry> &getEntries() { return Entries; } |
| |
| /// getAbsoluteRanges - Returns absolute address ranges defined by this range |
| /// list. Has to be passed base address of the compile unit referencing this |
| /// range list. |
| DWARFAddressRangesVector getAbsoluteRanges(uint64_t BaseAddress) const; |
| }; |
| |
| } // namespace llvm |
| |
| #endif // LLVM_DEBUGINFO_DWARFDEBUGRANGELIST_H |