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eceb5b9977
This section (introduced in DWARF-3) is used to define instruction address ranges for functions that are not contiguous and can't be described by low_pc/high_pc attributes (this is the usual case for inlined subroutines). The patch is the first step to support fetching complete inlining info from DWARF. Reviewed by Benjamin Kramer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162657 91177308-0d34-0410-b5e6-96231b3b80d8
127 lines
4.1 KiB
C++
127 lines
4.1 KiB
C++
//===-- DWARFContext.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_DWARFCONTEXT_H
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#define LLVM_DEBUGINFO_DWARFCONTEXT_H
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#include "DWARFCompileUnit.h"
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#include "DWARFDebugAranges.h"
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#include "DWARFDebugLine.h"
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#include "DWARFDebugRangeList.h"
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#include "llvm/DebugInfo/DIContext.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/ADT/SmallVector.h"
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namespace llvm {
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/// DWARFContext
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/// This data structure is the top level entity that deals with dwarf debug
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/// information parsing. The actual data is supplied through pure virtual
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/// methods that a concrete implementation provides.
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class DWARFContext : public DIContext {
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bool IsLittleEndian;
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SmallVector<DWARFCompileUnit, 1> CUs;
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OwningPtr<DWARFDebugAbbrev> Abbrev;
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OwningPtr<DWARFDebugAranges> Aranges;
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OwningPtr<DWARFDebugLine> Line;
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DWARFContext(DWARFContext &); // = delete
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DWARFContext &operator=(DWARFContext &); // = delete
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/// Read compile units from the debug_info section and store them in CUs.
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void parseCompileUnits();
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protected:
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DWARFContext(bool isLittleEndian) : IsLittleEndian(isLittleEndian) {}
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public:
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virtual void dump(raw_ostream &OS);
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/// Get the number of compile units in this context.
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unsigned getNumCompileUnits() {
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if (CUs.empty())
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parseCompileUnits();
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return CUs.size();
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}
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/// Get the compile unit at the specified index for this compile unit.
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DWARFCompileUnit *getCompileUnitAtIndex(unsigned index) {
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if (CUs.empty())
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parseCompileUnits();
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return &CUs[index];
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}
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/// Return the compile unit that includes an offset (relative to .debug_info).
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DWARFCompileUnit *getCompileUnitForOffset(uint32_t offset);
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/// Get a pointer to the parsed DebugAbbrev object.
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const DWARFDebugAbbrev *getDebugAbbrev();
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/// Get a pointer to the parsed DebugAranges object.
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const DWARFDebugAranges *getDebugAranges();
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/// Get a pointer to a parsed line table corresponding to a compile unit.
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const DWARFDebugLine::LineTable *
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getLineTableForCompileUnit(DWARFCompileUnit *cu);
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virtual DILineInfo getLineInfoForAddress(uint64_t address,
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DILineInfoSpecifier specifier = DILineInfoSpecifier());
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bool isLittleEndian() const { return IsLittleEndian; }
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virtual StringRef getInfoSection() = 0;
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virtual StringRef getAbbrevSection() = 0;
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virtual StringRef getARangeSection() = 0;
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virtual StringRef getLineSection() = 0;
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virtual StringRef getStringSection() = 0;
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virtual StringRef getRangeSection() = 0;
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static bool isSupportedVersion(unsigned version) {
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return version == 2 || version == 3;
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}
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};
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/// DWARFContextInMemory is the simplest possible implementation of a
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/// DWARFContext. It assumes all content is available in memory and stores
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/// pointers to it.
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class DWARFContextInMemory : public DWARFContext {
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virtual void anchor();
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StringRef InfoSection;
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StringRef AbbrevSection;
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StringRef ARangeSection;
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StringRef LineSection;
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StringRef StringSection;
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StringRef RangeSection;
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public:
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DWARFContextInMemory(bool isLittleEndian,
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StringRef infoSection,
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StringRef abbrevSection,
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StringRef aRangeSection,
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StringRef lineSection,
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StringRef stringSection,
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StringRef rangeSection)
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: DWARFContext(isLittleEndian),
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InfoSection(infoSection),
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AbbrevSection(abbrevSection),
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ARangeSection(aRangeSection),
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LineSection(lineSection),
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StringSection(stringSection),
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RangeSection(rangeSection)
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{}
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virtual StringRef getInfoSection() { return InfoSection; }
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virtual StringRef getAbbrevSection() { return AbbrevSection; }
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virtual StringRef getARangeSection() { return ARangeSection; }
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virtual StringRef getLineSection() { return LineSection; }
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virtual StringRef getStringSection() { return StringSection; }
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virtual StringRef getRangeSection() { return RangeSection; }
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};
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}
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#endif
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