Merge "Update aosp/master LLVM for rebase to r230699."

1 files changed, 292 insertions, 0 deletions

diff --git a/include/llvm/DebugInfo/DWARF/DWARFContext.h b/include/llvm/DebugInfo/DWARF/DWARFContext.h
new file mode 100644
index 0000000..677242b
--- /dev/null
+++ b/include/llvm/DebugInfo/DWARF/DWARFContext.h
@@ -0,0 +1,292 @@
+//===-- DWARFContext.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_DWARFCONTEXT_H
+#define LLVM_LIB_DEBUGINFO_DWARFCONTEXT_H
+
+#include "llvm/ADT/MapVector.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/DebugInfo/DWARF/DIContext.h"
+#include "llvm/DebugInfo/DWARF/DWARFCompileUnit.h"
+#include "llvm/DebugInfo/DWARF/DWARFDebugAranges.h"
+#include "llvm/DebugInfo/DWARF/DWARFDebugFrame.h"
+#include "llvm/DebugInfo/DWARF/DWARFDebugLine.h"
+#include "llvm/DebugInfo/DWARF/DWARFDebugLoc.h"
+#include "llvm/DebugInfo/DWARF/DWARFDebugRangeList.h"
+#include "llvm/DebugInfo/DWARF/DWARFSection.h"
+#include "llvm/DebugInfo/DWARF/DWARFTypeUnit.h"
+#include <vector>
+
+namespace llvm {
+
+/// DWARFContext
+/// This data structure is the top level entity that deals with dwarf debug
+/// information parsing. The actual data is supplied through pure virtual
+/// methods that a concrete implementation provides.
+class DWARFContext : public DIContext {
+
+  DWARFUnitSection<DWARFCompileUnit> CUs;
+  std::vector<DWARFUnitSection<DWARFTypeUnit>> TUs;
+  std::unique_ptr<DWARFDebugAbbrev> Abbrev;
+  std::unique_ptr<DWARFDebugLoc> Loc;
+  std::unique_ptr<DWARFDebugAranges> Aranges;
+  std::unique_ptr<DWARFDebugLine> Line;
+  std::unique_ptr<DWARFDebugFrame> DebugFrame;
+
+  DWARFUnitSection<DWARFCompileUnit> DWOCUs;
+  std::vector<DWARFUnitSection<DWARFTypeUnit>> DWOTUs;
+  std::unique_ptr<DWARFDebugAbbrev> AbbrevDWO;
+  std::unique_ptr<DWARFDebugLocDWO> LocDWO;
+
+  DWARFContext(DWARFContext &) = delete;
+  DWARFContext &operator=(DWARFContext &) = delete;
+
+  /// Read compile units from the debug_info section (if necessary)
+  /// and store them in CUs.
+  void parseCompileUnits();
+
+  /// Read type units from the debug_types sections (if necessary)
+  /// and store them in TUs.
+  void parseTypeUnits();
+
+  /// Read compile units from the debug_info.dwo section (if necessary)
+  /// and store them in DWOCUs.
+  void parseDWOCompileUnits();
+
+  /// Read type units from the debug_types.dwo section (if necessary)
+  /// and store them in DWOTUs.
+  void parseDWOTypeUnits();
+
+public:
+  DWARFContext() : DIContext(CK_DWARF) {}
+
+  static bool classof(const DIContext *DICtx) {
+    return DICtx->getKind() == CK_DWARF;
+  }
+
+  void dump(raw_ostream &OS, DIDumpType DumpType = DIDT_All) override;
+
+  typedef DWARFUnitSection<DWARFCompileUnit>::iterator_range cu_iterator_range;
+  typedef DWARFUnitSection<DWARFTypeUnit>::iterator_range tu_iterator_range;
+  typedef iterator_range<std::vector<DWARFUnitSection<DWARFTypeUnit>>::iterator> tu_section_iterator_range;
+
+  /// Get compile units in this context.
+  cu_iterator_range compile_units() {
+    parseCompileUnits();
+    return cu_iterator_range(CUs.begin(), CUs.end());
+  }
+
+  /// Get type units in this context.
+  tu_section_iterator_range type_unit_sections() {
+    parseTypeUnits();
+    return tu_section_iterator_range(TUs.begin(), TUs.end());
+  }
+
+  /// Get compile units in the DWO context.
+  cu_iterator_range dwo_compile_units() {
+    parseDWOCompileUnits();
+    return cu_iterator_range(DWOCUs.begin(), DWOCUs.end());
+  }
+
+  /// Get type units in the DWO context.
+  tu_section_iterator_range dwo_type_unit_sections() {
+    parseDWOTypeUnits();
+    return tu_section_iterator_range(DWOTUs.begin(), DWOTUs.end());
+  }
+
+  /// Get the number of compile units in this context.
+  unsigned getNumCompileUnits() {
+    parseCompileUnits();
+    return CUs.size();
+  }
+
+  /// Get the number of compile units in this context.
+  unsigned getNumTypeUnits() {
+    parseTypeUnits();
+    return TUs.size();
+  }
+
+  /// Get the number of compile units in the DWO context.
+  unsigned getNumDWOCompileUnits() {
+    parseDWOCompileUnits();
+    return DWOCUs.size();
+  }
+
+  /// Get the number of compile units in the DWO context.
+  unsigned getNumDWOTypeUnits() {
+    parseDWOTypeUnits();
+    return DWOTUs.size();
+  }
+
+  /// Get the compile unit at the specified index for this compile unit.
+  DWARFCompileUnit *getCompileUnitAtIndex(unsigned index) {
+    parseCompileUnits();
+    return CUs[index].get();
+  }
+
+  /// Get the compile unit at the specified index for the DWO compile units.
+  DWARFCompileUnit *getDWOCompileUnitAtIndex(unsigned index) {
+    parseDWOCompileUnits();
+    return DWOCUs[index].get();
+  }
+
+  /// Get a pointer to the parsed DebugAbbrev object.
+  const DWARFDebugAbbrev *getDebugAbbrev();
+
+  /// Get a pointer to the parsed DebugLoc object.
+  const DWARFDebugLoc *getDebugLoc();
+
+  /// Get a pointer to the parsed dwo abbreviations object.
+  const DWARFDebugAbbrev *getDebugAbbrevDWO();
+
+  /// Get a pointer to the parsed DebugLoc object.
+  const DWARFDebugLocDWO *getDebugLocDWO();
+
+  /// Get a pointer to the parsed DebugAranges object.
+  const DWARFDebugAranges *getDebugAranges();
+
+  /// Get a pointer to the parsed frame information object.
+  const DWARFDebugFrame *getDebugFrame();
+
+  /// Get a pointer to a parsed line table corresponding to a compile unit.
+  const DWARFDebugLine::LineTable *getLineTableForUnit(DWARFUnit *cu);
+
+  DILineInfo getLineInfoForAddress(uint64_t Address,
+      DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
+  DILineInfoTable getLineInfoForAddressRange(uint64_t Address, uint64_t Size,
+      DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
+  DIInliningInfo getInliningInfoForAddress(uint64_t Address,
+      DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
+
+  virtual bool isLittleEndian() const = 0;
+  virtual uint8_t getAddressSize() const = 0;
+  virtual const DWARFSection &getInfoSection() = 0;
+  typedef MapVector<object::SectionRef, DWARFSection,
+                    std::map<object::SectionRef, unsigned>> TypeSectionMap;
+  virtual const TypeSectionMap &getTypesSections() = 0;
+  virtual StringRef getAbbrevSection() = 0;
+  virtual const DWARFSection &getLocSection() = 0;
+  virtual StringRef getARangeSection() = 0;
+  virtual StringRef getDebugFrameSection() = 0;
+  virtual const DWARFSection &getLineSection() = 0;
+  virtual StringRef getStringSection() = 0;
+  virtual StringRef getRangeSection() = 0;
+  virtual StringRef getPubNamesSection() = 0;
+  virtual StringRef getPubTypesSection() = 0;
+  virtual StringRef getGnuPubNamesSection() = 0;
+  virtual StringRef getGnuPubTypesSection() = 0;
+
+  // Sections for DWARF5 split dwarf proposal.
+  virtual const DWARFSection &getInfoDWOSection() = 0;
+  virtual const TypeSectionMap &getTypesDWOSections() = 0;
+  virtual StringRef getAbbrevDWOSection() = 0;
+  virtual const DWARFSection &getLineDWOSection() = 0;
+  virtual const DWARFSection &getLocDWOSection() = 0;
+  virtual StringRef getStringDWOSection() = 0;
+  virtual StringRef getStringOffsetDWOSection() = 0;
+  virtual StringRef getRangeDWOSection() = 0;
+  virtual StringRef getAddrSection() = 0;
+  virtual const DWARFSection& getAppleNamesSection() = 0;
+  virtual const DWARFSection& getAppleTypesSection() = 0;
+  virtual const DWARFSection& getAppleNamespacesSection() = 0;
+  virtual const DWARFSection& getAppleObjCSection() = 0;
+
+  static bool isSupportedVersion(unsigned version) {
+    return version == 2 || version == 3 || version == 4;
+  }
+private:
+  /// Return the compile unit that includes an offset (relative to .debug_info).
+  DWARFCompileUnit *getCompileUnitForOffset(uint32_t Offset);
+
+  /// Return the compile unit which contains instruction with provided
+  /// address.
+  DWARFCompileUnit *getCompileUnitForAddress(uint64_t Address);
+};
+
+/// DWARFContextInMemory is the simplest possible implementation of a
+/// DWARFContext. It assumes all content is available in memory and stores
+/// pointers to it.
+class DWARFContextInMemory : public DWARFContext {
+  virtual void anchor();
+  bool IsLittleEndian;
+  uint8_t AddressSize;
+  DWARFSection InfoSection;
+  TypeSectionMap TypesSections;
+  StringRef AbbrevSection;
+  DWARFSection LocSection;
+  StringRef ARangeSection;
+  StringRef DebugFrameSection;
+  DWARFSection LineSection;
+  StringRef StringSection;
+  StringRef RangeSection;
+  StringRef PubNamesSection;
+  StringRef PubTypesSection;
+  StringRef GnuPubNamesSection;
+  StringRef GnuPubTypesSection;
+
+  // Sections for DWARF5 split dwarf proposal.
+  DWARFSection InfoDWOSection;
+  TypeSectionMap TypesDWOSections;
+  StringRef AbbrevDWOSection;
+  DWARFSection LineDWOSection;
+  DWARFSection LocDWOSection;
+  StringRef StringDWOSection;
+  StringRef StringOffsetDWOSection;
+  StringRef RangeDWOSection;
+  StringRef AddrSection;
+  DWARFSection AppleNamesSection;
+  DWARFSection AppleTypesSection;
+  DWARFSection AppleNamespacesSection;
+  DWARFSection AppleObjCSection;
+
+  SmallVector<SmallString<32>, 4> UncompressedSections;
+
+public:
+  DWARFContextInMemory(const object::ObjectFile &Obj);
+  bool isLittleEndian() const override { return IsLittleEndian; }
+  uint8_t getAddressSize() const override { return AddressSize; }
+  const DWARFSection &getInfoSection() override { return InfoSection; }
+  const TypeSectionMap &getTypesSections() override { return TypesSections; }
+  StringRef getAbbrevSection() override { return AbbrevSection; }
+  const DWARFSection &getLocSection() override { return LocSection; }
+  StringRef getARangeSection() override { return ARangeSection; }
+  StringRef getDebugFrameSection() override { return DebugFrameSection; }
+  const DWARFSection &getLineSection() override { return LineSection; }
+  StringRef getStringSection() override { return StringSection; }
+  StringRef getRangeSection() override { return RangeSection; }
+  StringRef getPubNamesSection() override { return PubNamesSection; }
+  StringRef getPubTypesSection() override { return PubTypesSection; }
+  StringRef getGnuPubNamesSection() override { return GnuPubNamesSection; }
+  StringRef getGnuPubTypesSection() override { return GnuPubTypesSection; }
+  const DWARFSection& getAppleNamesSection() override { return AppleNamesSection; }
+  const DWARFSection& getAppleTypesSection() override { return AppleTypesSection; }
+  const DWARFSection& getAppleNamespacesSection() override { return AppleNamespacesSection; }
+  const DWARFSection& getAppleObjCSection() override { return AppleObjCSection; }
+
+  // Sections for DWARF5 split dwarf proposal.
+  const DWARFSection &getInfoDWOSection() override { return InfoDWOSection; }
+  const TypeSectionMap &getTypesDWOSections() override {
+    return TypesDWOSections;
+  }
+  StringRef getAbbrevDWOSection() override { return AbbrevDWOSection; }
+  const DWARFSection &getLineDWOSection() override { return LineDWOSection; }
+  const DWARFSection &getLocDWOSection() override { return LocDWOSection; }
+  StringRef getStringDWOSection() override { return StringDWOSection; }
+  StringRef getStringOffsetDWOSection() override {
+    return StringOffsetDWOSection;
+  }
+  StringRef getRangeDWOSection() override { return RangeDWOSection; }
+  StringRef getAddrSection() override {
+    return AddrSection;
+  }
+};
+
+}
+
+#endif