vendor/llvm/llvm-trunk-r154661

1 files changed, 207 insertions, 68 deletions

diff --git a/include/llvm/Object/ObjectFile.h b/include/llvm/Object/ObjectFile.h
index 83854a0d6c28..4dd7fb581308 100644
--- a/include/llvm/Object/ObjectFile.h
+++ b/include/llvm/Object/ObjectFile.h
@@ -20,6 +20,7 @@
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include <cstring>
+#include <vector>
 
 namespace llvm {
 namespace object {
@@ -37,6 +38,9 @@ union DataRefImpl {
     uint32_t a, b;
   } d;
   uintptr_t p;
+  DataRefImpl() {
+    std::memset(this, 0, sizeof(DataRefImpl));
+  }
 };
 
 template<class content_type>
@@ -78,52 +82,13 @@ static bool operator ==(const DataRefImpl &a, const DataRefImpl &b) {
   return std::memcmp(&a, &b, sizeof(DataRefImpl)) == 0;
 }
 
-/// SymbolRef - This is a value type class that represents a single symbol in
-/// the list of symbols in the object file.
-class SymbolRef {
-  friend class SectionRef;
-  DataRefImpl SymbolPimpl;
-  const ObjectFile *OwningObject;
-
-public:
-  SymbolRef() : OwningObject(NULL) {
-    std::memset(&SymbolPimpl, 0, sizeof(SymbolPimpl));
-  }
-
-  enum SymbolType {
-    ST_Function,
-    ST_Data,
-    ST_External,    // Defined in another object file
-    ST_Other
-  };
-
-  SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner);
-
-  bool operator==(const SymbolRef &Other) const;
-
-  error_code getNext(SymbolRef &Result) const;
-
-  error_code getName(StringRef &Result) const;
-  error_code getAddress(uint64_t &Result) const;
-  error_code getOffset(uint64_t &Result) const;
-  error_code getSize(uint64_t &Result) const;
-  error_code getSymbolType(SymbolRef::SymbolType &Result) const;
-
-  /// Returns the ascii char that should be displayed in a symbol table dump via
-  /// nm for this symbol.
-  error_code getNMTypeChar(char &Result) const;
-
-  /// Returns true for symbols that are internal to the object file format such
-  /// as section symbols.
-  error_code isInternal(bool &Result) const;
-
-  /// Returns true for symbols that can be used in another objects,
-  /// such as library functions
-  error_code isGlobal(bool &Result) const;
+static bool operator <(const DataRefImpl &a, const DataRefImpl &b) {
+  // Check bitwise identical. This is the only legal way to compare a union w/o
+  // knowing which member is in use.
+  return std::memcmp(&a, &b, sizeof(DataRefImpl)) < 0;
+}
 
-  DataRefImpl getRawDataRefImpl() const;
-};
-typedef content_iterator<SymbolRef> symbol_iterator;
+class SymbolRef;
 
 /// RelocationRef - This is a value type class that represents a single
 /// relocation in the list of relocations in the object file.
@@ -132,9 +97,7 @@ class RelocationRef {
   const ObjectFile *OwningObject;
 
 public:
-  RelocationRef() : OwningObject(NULL) {
-    std::memset(&RelocationPimpl, 0, sizeof(RelocationPimpl));
-  }
+  RelocationRef() : OwningObject(NULL) { }
 
   RelocationRef(DataRefImpl RelocationP, const ObjectFile *Owner);
 
@@ -143,8 +106,14 @@ public:
   error_code getNext(RelocationRef &Result) const;
 
   error_code getAddress(uint64_t &Result) const;
+  error_code getOffset(uint64_t &Result) const;
   error_code getSymbol(SymbolRef &Result) const;
-  error_code getType(uint32_t &Result) const;
+  error_code getType(uint64_t &Result) const;
+
+  /// @brief Indicates whether this relocation should hidden when listing
+  /// relocations, usually because it is the trailing part of a multipart
+  /// relocation that will be printed as part of the leading relocation.
+  error_code getHidden(bool &Result) const;
 
   /// @brief Get a string that represents the type of this relocation.
   ///
@@ -168,13 +137,12 @@ class SectionRef {
   const ObjectFile *OwningObject;
 
 public:
-  SectionRef() : OwningObject(NULL) {
-    std::memset(&SectionPimpl, 0, sizeof(SectionPimpl));
-  }
+  SectionRef() : OwningObject(NULL) { }
 
   SectionRef(DataRefImpl SectionP, const ObjectFile *Owner);
 
   bool operator==(const SectionRef &Other) const;
+  bool operator <(const SectionRef &Other) const;
 
   error_code getNext(SectionRef &Result) const;
 
@@ -190,21 +158,112 @@ public:
   error_code isText(bool &Result) const;
   error_code isData(bool &Result) const;
   error_code isBSS(bool &Result) const;
+  error_code isRequiredForExecution(bool &Result) const;
+  error_code isVirtual(bool &Result) const;
+  error_code isZeroInit(bool &Result) const;
 
   error_code containsSymbol(SymbolRef S, bool &Result) const;
 
   relocation_iterator begin_relocations() const;
   relocation_iterator end_relocations() const;
+
+  DataRefImpl getRawDataRefImpl() const;
 };
 typedef content_iterator<SectionRef> section_iterator;
 
+/// SymbolRef - This is a value type class that represents a single symbol in
+/// the list of symbols in the object file.
+class SymbolRef {
+  friend class SectionRef;
+  DataRefImpl SymbolPimpl;
+  const ObjectFile *OwningObject;
+
+public:
+  SymbolRef() : OwningObject(NULL) { }
+
+  enum Type {
+    ST_Unknown, // Type not specified
+    ST_Data,
+    ST_Debug,
+    ST_File,
+    ST_Function,
+    ST_Other
+  };
+
+  enum Flags {
+    SF_None            = 0,
+    SF_Undefined       = 1U << 0,  // Symbol is defined in another object file
+    SF_Global          = 1U << 1,  // Global symbol
+    SF_Weak            = 1U << 2,  // Weak symbol
+    SF_Absolute        = 1U << 3,  // Absolute symbol
+    SF_ThreadLocal     = 1U << 4,  // Thread local symbol
+    SF_Common          = 1U << 5,  // Symbol has common linkage
+    SF_FormatSpecific  = 1U << 31  // Specific to the object file format
+                                   // (e.g. section symbols)
+  };
+
+  SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner);
+
+  bool operator==(const SymbolRef &Other) const;
+  bool operator <(const SymbolRef &Other) const;
+
+  error_code getNext(SymbolRef &Result) const;
+
+  error_code getName(StringRef &Result) const;
+  error_code getAddress(uint64_t &Result) const;
+  error_code getFileOffset(uint64_t &Result) const;
+  error_code getSize(uint64_t &Result) const;
+  error_code getType(SymbolRef::Type &Result) const;
+
+  /// Returns the ascii char that should be displayed in a symbol table dump via
+  /// nm for this symbol.
+  error_code getNMTypeChar(char &Result) const;
+
+  /// Get symbol flags (bitwise OR of SymbolRef::Flags)
+  error_code getFlags(uint32_t &Result) const;
+
+  /// @brief Return true for common symbols such as uninitialized globals
+  error_code isCommon(bool &Result) const;
+
+  /// @brief Get section this symbol is defined in reference to. Result is
+  /// end_sections() if it is undefined or is an absolute symbol.
+  error_code getSection(section_iterator &Result) const;
+
+  DataRefImpl getRawDataRefImpl() const;
+};
+typedef content_iterator<SymbolRef> symbol_iterator;
+
+/// LibraryRef - This is a value type class that represents a single library in
+/// the list of libraries needed by a shared or dynamic object.
+class LibraryRef {
+  friend class SectionRef;
+  DataRefImpl LibraryPimpl;
+  const ObjectFile *OwningObject;
+
+public:
+  LibraryRef() : OwningObject(NULL) { }
+
+  LibraryRef(DataRefImpl LibraryP, const ObjectFile *Owner);
+
+  bool operator==(const LibraryRef &Other) const;
+  bool operator <(const LibraryRef &Other) const;
+
+  error_code getNext(LibraryRef &Result) const;
+
+  // Get the path to this library, as stored in the object file.
+  error_code getPath(StringRef &Result) const;
+
+  DataRefImpl getRawDataRefImpl() const;
+};
+typedef content_iterator<LibraryRef> library_iterator;
+
 const uint64_t UnknownAddressOrSize = ~0ULL;
 
 /// ObjectFile - This class is the base class for all object file types.
 /// Concrete instances of this object are created by createObjectFile, which
 /// figure out which type to create.
 class ObjectFile : public Binary {
-private:
+  virtual void anchor();
   ObjectFile(); // = delete
   ObjectFile(const ObjectFile &other); // = delete
 
@@ -227,12 +286,15 @@ protected:
   virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const = 0;
   virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const = 0;
   virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const =0;
-  virtual error_code getSymbolOffset(DataRefImpl Symb, uint64_t &Res) const =0;
+  virtual error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const =0;
   virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const = 0;
+  virtual error_code getSymbolType(DataRefImpl Symb,
+                                   SymbolRef::Type &Res) const = 0;
   virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const = 0;
-  virtual error_code isSymbolInternal(DataRefImpl Symb, bool &Res) const = 0;
-  virtual error_code isSymbolGlobal(DataRefImpl Symb, bool &Res) const = 0;
-  virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::SymbolType &Res) const = 0;
+  virtual error_code getSymbolFlags(DataRefImpl Symb,
+                                    uint32_t &Res) const = 0;
+  virtual error_code getSymbolSection(DataRefImpl Symb,
+                                      section_iterator &Res) const = 0;
 
   // Same as above for SectionRef.
   friend class SectionRef;
@@ -245,6 +307,11 @@ protected:
   virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const = 0;
   virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const = 0;
   virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const = 0;
+  virtual error_code isSectionRequiredForExecution(DataRefImpl Sec,
+                                                   bool &Res) const = 0;
+  // A section is 'virtual' if its contents aren't present in the object image.
+  virtual error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const = 0;
+  virtual error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const = 0;
   virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
                                            bool &Result) const = 0;
   virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const = 0;
@@ -257,25 +324,42 @@ protected:
                                        RelocationRef &Res) const = 0;
   virtual error_code getRelocationAddress(DataRefImpl Rel,
                                           uint64_t &Res) const =0;
+  virtual error_code getRelocationOffset(DataRefImpl Rel,
+                                         uint64_t &Res) const =0;
   virtual error_code getRelocationSymbol(DataRefImpl Rel,
                                          SymbolRef &Res) const = 0;
   virtual error_code getRelocationType(DataRefImpl Rel,
-                                       uint32_t &Res) const = 0;
+                                       uint64_t &Res) const = 0;
   virtual error_code getRelocationTypeName(DataRefImpl Rel,
                                        SmallVectorImpl<char> &Result) const = 0;
   virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
                                                  int64_t &Res) const = 0;
   virtual error_code getRelocationValueString(DataRefImpl Rel,
                                        SmallVectorImpl<char> &Result) const = 0;
+  virtual error_code getRelocationHidden(DataRefImpl Rel, bool &Result) const {
+    Result = false;
+    return object_error::success;
+  }
+
+  // Same for LibraryRef
+  friend class LibraryRef;
+  virtual error_code getLibraryNext(DataRefImpl Lib, LibraryRef &Res) const = 0;
+  virtual error_code getLibraryPath(DataRefImpl Lib, StringRef &Res) const = 0;
 
 public:
 
   virtual symbol_iterator begin_symbols() const = 0;
   virtual symbol_iterator end_symbols() const = 0;
 
+  virtual symbol_iterator begin_dynamic_symbols() const = 0;
+  virtual symbol_iterator end_dynamic_symbols() const = 0;
+
   virtual section_iterator begin_sections() const = 0;
   virtual section_iterator end_sections() const = 0;
 
+  virtual library_iterator begin_libraries_needed() const = 0;
+  virtual library_iterator end_libraries_needed() const = 0;
+
   /// @brief The number of bytes used to represent an address in this object
   ///        file format.
   virtual uint8_t getBytesInAddress() const = 0;
@@ -283,6 +367,11 @@ public:
   virtual StringRef getFileFormatName() const = 0;
   virtual /* Triple::ArchType */ unsigned getArch() const = 0;
 
+  /// For shared objects, returns the name which this object should be
+  /// loaded from at runtime. This corresponds to DT_SONAME on ELF and
+  /// LC_ID_DYLIB (install name) on MachO.
+  virtual StringRef getLoadName() const = 0;
+
   /// @returns Pointer to ObjectFile subclass to handle this type of object.
   /// @param ObjectPath The path to the object file. ObjectPath.isObject must
   ///        return true.
@@ -291,8 +380,7 @@ public:
   static ObjectFile *createObjectFile(MemoryBuffer *Object);
 
   static inline bool classof(const Binary *v) {
-    return v->getType() >= isObject &&
-           v->getType() < lastObject;
+    return v->isObject();
   }
   static inline bool classof(const ObjectFile *v) { return true; }
 
@@ -311,6 +399,10 @@ inline bool SymbolRef::operator==(const SymbolRef &Other) const {
   return SymbolPimpl == Other.SymbolPimpl;
 }
 
+inline bool SymbolRef::operator <(const SymbolRef &Other) const {
+  return SymbolPimpl < Other.SymbolPimpl;
+}
+
 inline error_code SymbolRef::getNext(SymbolRef &Result) const {
   return OwningObject->getSymbolNext(SymbolPimpl, Result);
 }
@@ -323,8 +415,8 @@ inline error_code SymbolRef::getAddress(uint64_t &Result) const {
   return OwningObject->getSymbolAddress(SymbolPimpl, Result);
 }
 
-inline error_code SymbolRef::getOffset(uint64_t &Result) const {
-  return OwningObject->getSymbolOffset(SymbolPimpl, Result);
+inline error_code SymbolRef::getFileOffset(uint64_t &Result) const {
+  return OwningObject->getSymbolFileOffset(SymbolPimpl, Result);
 }
 
 inline error_code SymbolRef::getSize(uint64_t &Result) const {
@@ -335,15 +427,15 @@ inline error_code SymbolRef::getNMTypeChar(char &Result) const {
   return OwningObject->getSymbolNMTypeChar(SymbolPimpl, Result);
 }
 
-inline error_code SymbolRef::isInternal(bool &Result) const {
-  return OwningObject->isSymbolInternal(SymbolPimpl, Result);
+inline error_code SymbolRef::getFlags(uint32_t &Result) const {
+  return OwningObject->getSymbolFlags(SymbolPimpl, Result);
 }
 
-inline error_code SymbolRef::isGlobal(bool &Result) const {
-  return OwningObject->isSymbolGlobal(SymbolPimpl, Result);
+inline error_code SymbolRef::getSection(section_iterator &Result) const {
+  return OwningObject->getSymbolSection(SymbolPimpl, Result);
 }
 
-inline error_code SymbolRef::getSymbolType(SymbolRef::SymbolType &Result) const {
+inline error_code SymbolRef::getType(SymbolRef::Type &Result) const {
   return OwningObject->getSymbolType(SymbolPimpl, Result);
 }
 
@@ -362,6 +454,10 @@ inline bool SectionRef::operator==(const SectionRef &Other) const {
   return SectionPimpl == Other.SectionPimpl;
 }
 
+inline bool SectionRef::operator <(const SectionRef &Other) const {
+  return SectionPimpl < Other.SectionPimpl;
+}
+
 inline error_code SectionRef::getNext(SectionRef &Result) const {
   return OwningObject->getSectionNext(SectionPimpl, Result);
 }
@@ -398,6 +494,18 @@ inline error_code SectionRef::isBSS(bool &Result) const {
   return OwningObject->isSectionBSS(SectionPimpl, Result);
 }
 
+inline error_code SectionRef::isRequiredForExecution(bool &Result) const {
+  return OwningObject->isSectionRequiredForExecution(SectionPimpl, Result);
+}
+
+inline error_code SectionRef::isVirtual(bool &Result) const {
+  return OwningObject->isSectionVirtual(SectionPimpl, Result);
+}
+
+inline error_code SectionRef::isZeroInit(bool &Result) const {
+  return OwningObject->isSectionZeroInit(SectionPimpl, Result);
+}
+
 inline error_code SectionRef::containsSymbol(SymbolRef S, bool &Result) const {
   return OwningObject->sectionContainsSymbol(SectionPimpl, S.SymbolPimpl,
                                              Result);
@@ -411,6 +519,9 @@ inline relocation_iterator SectionRef::end_relocations() const {
   return OwningObject->getSectionRelEnd(SectionPimpl);
 }
 
+inline DataRefImpl SectionRef::getRawDataRefImpl() const {
+  return SectionPimpl;
+}
 
 /// RelocationRef
 inline RelocationRef::RelocationRef(DataRefImpl RelocationP,
@@ -430,11 +541,15 @@ inline error_code RelocationRef::getAddress(uint64_t &Result) const {
   return OwningObject->getRelocationAddress(RelocationPimpl, Result);
 }
 
+inline error_code RelocationRef::getOffset(uint64_t &Result) const {
+  return OwningObject->getRelocationOffset(RelocationPimpl, Result);
+}
+
 inline error_code RelocationRef::getSymbol(SymbolRef &Result) const {
   return OwningObject->getRelocationSymbol(RelocationPimpl, Result);
 }
 
-inline error_code RelocationRef::getType(uint32_t &Result) const {
+inline error_code RelocationRef::getType(uint64_t &Result) const {
   return OwningObject->getRelocationType(RelocationPimpl, Result);
 }
 
@@ -452,6 +567,30 @@ inline error_code RelocationRef::getValueString(SmallVectorImpl<char> &Result)
   return OwningObject->getRelocationValueString(RelocationPimpl, Result);
 }
 
+inline error_code RelocationRef::getHidden(bool &Result) const {
+  return OwningObject->getRelocationHidden(RelocationPimpl, Result);
+}
+// Inline function definitions.
+inline LibraryRef::LibraryRef(DataRefImpl LibraryP, const ObjectFile *Owner)
+  : LibraryPimpl(LibraryP)
+  , OwningObject(Owner) {}
+
+inline bool LibraryRef::operator==(const LibraryRef &Other) const {
+  return LibraryPimpl == Other.LibraryPimpl;
+}
+
+inline bool LibraryRef::operator <(const LibraryRef &Other) const {
+  return LibraryPimpl < Other.LibraryPimpl;
+}
+
+inline error_code LibraryRef::getNext(LibraryRef &Result) const {
+  return OwningObject->getLibraryNext(LibraryPimpl, Result);
+}
+
+inline error_code LibraryRef::getPath(StringRef &Result) const {
+  return OwningObject->getLibraryPath(LibraryPimpl, Result);
+}
+
 } // end namespace object
 } // end namespace llvm