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84 lines
3.0 KiB
C++
84 lines
3.0 KiB
C++
//===- DWARFDebugRangeList.h ------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DEBUGINFO_DWARF_DWARFDEBUGRANGELIST_H
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#define LLVM_DEBUGINFO_DWARF_DWARFDEBUGRANGELIST_H
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#include "llvm/DebugInfo/DWARF/DWARFAddressRange.h"
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#include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
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#include <cassert>
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#include <cstdint>
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#include <vector>
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namespace llvm {
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class raw_ostream;
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class DWARFDebugRangeList {
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public:
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struct RangeListEntry {
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/// A beginning address offset. This address offset has the size of an
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/// address and is relative to the applicable base address of the
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/// compilation unit referencing this range list. It marks the beginning
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/// of an address range.
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uint64_t StartAddress;
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/// An ending address offset. This address offset again has the size of
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/// an address and is relative to the applicable base address of the
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/// compilation unit referencing this range list. It marks the first
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/// address past the end of the address range. The ending address must
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/// be greater than or equal to the beginning address.
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uint64_t EndAddress;
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/// A section index this range belongs to.
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uint64_t SectionIndex;
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/// The end of any given range list is marked by an end of list entry,
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/// which consists of a 0 for the beginning address offset
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/// and a 0 for the ending address offset.
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bool isEndOfListEntry() const {
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return (StartAddress == 0) && (EndAddress == 0);
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}
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/// A base address selection entry consists of:
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/// 1. The value of the largest representable address offset
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/// (for example, 0xffffffff when the size of an address is 32 bits).
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/// 2. An address, which defines the appropriate base address for
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/// use in interpreting the beginning and ending address offsets of
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/// subsequent entries of the location list.
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bool isBaseAddressSelectionEntry(uint8_t AddressSize) const {
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assert(AddressSize == 4 || AddressSize == 8);
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if (AddressSize == 4)
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return StartAddress == -1U;
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return StartAddress == -1ULL;
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}
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};
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private:
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/// Offset in .debug_ranges section.
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uint64_t Offset;
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uint8_t AddressSize;
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std::vector<RangeListEntry> Entries;
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public:
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DWARFDebugRangeList() { clear(); }
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void clear();
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void dump(raw_ostream &OS) const;
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Error extract(const DWARFDataExtractor &data, uint64_t *offset_ptr);
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const std::vector<RangeListEntry> &getEntries() { return Entries; }
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/// getAbsoluteRanges - Returns absolute address ranges defined by this range
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/// list. Has to be passed base address of the compile unit referencing this
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/// range list.
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DWARFAddressRangesVector
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getAbsoluteRanges(llvm::Optional<object::SectionedAddress> BaseAddr) const;
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};
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} // end namespace llvm
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#endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGRANGELIST_H
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