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d5d88c38e4
There is no need to keep the whole contents of .debug_aranges section in memory when we build address ranges table. Memory optimization that used to be in this code (precalculate the size of vector of ranges before filling it) is not really needed - later we will compact and resize this vector anyway. llvm-svn: 207457
71 lines
2.0 KiB
C++
71 lines
2.0 KiB
C++
//===-- DWARFDebugArangeSet.h -----------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DEBUGINFO_DWARFDEBUGARANGESET_H
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#define LLVM_DEBUGINFO_DWARFDEBUGARANGESET_H
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#include "llvm/ADT/iterator_range.h"
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#include "llvm/Support/DataExtractor.h"
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#include <vector>
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namespace llvm {
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class raw_ostream;
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class DWARFDebugArangeSet {
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public:
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struct Header {
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// The total length of the entries for that set, not including the length
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// field itself.
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uint32_t Length;
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// The offset from the beginning of the .debug_info section of the
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// compilation unit entry referenced by the table.
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uint32_t CuOffset;
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// The DWARF version number.
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uint16_t Version;
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// The size in bytes of an address on the target architecture. For segmented
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// addressing, this is the size of the offset portion of the address.
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uint8_t AddrSize;
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// The size in bytes of a segment descriptor on the target architecture.
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// If the target system uses a flat address space, this value is 0.
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uint8_t SegSize;
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};
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struct Descriptor {
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uint64_t Address;
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uint64_t Length;
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uint64_t getEndAddress() const { return Address + Length; }
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};
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private:
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typedef std::vector<Descriptor> DescriptorColl;
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typedef iterator_range<DescriptorColl::const_iterator> desc_iterator_range;
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uint32_t Offset;
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Header HeaderData;
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DescriptorColl ArangeDescriptors;
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public:
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DWARFDebugArangeSet() { clear(); }
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void clear();
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bool extract(DataExtractor data, uint32_t *offset_ptr);
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void dump(raw_ostream &OS) const;
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uint32_t getCompileUnitDIEOffset() const { return HeaderData.CuOffset; }
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desc_iterator_range descriptors() const {
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return desc_iterator_range(ArangeDescriptors.begin(),
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ArangeDescriptors.end());
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}
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};
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}
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#endif
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