Use std::unique_ptr to make the ownership explicit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214377 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Object/Binary.h

@@ -126,10 +126,11 @@ public:
 /// @brief Create a Binary from Source, autodetecting the file type.
 ///
 /// @param Source The data to create the Binary from.
-ErrorOr<Binary *> createBinary(std::unique_ptr<MemoryBuffer> Source,
+ErrorOr<std::unique_ptr<Binary>>
-                               LLVMContext *Context = nullptr);
+createBinary(std::unique_ptr<MemoryBuffer> Source,
+             LLVMContext *Context = nullptr);
 
-ErrorOr<Binary *> createBinary(StringRef Path);
+ErrorOr<std::unique_ptr<Binary>> createBinary(StringRef Path);
 }
 }
 

include/llvm/Object/ObjectFile.h

@@ -27,6 +27,8 @@ namespace llvm {
 namespace object {
 
 class ObjectFile;
+class COFFObjectFile;
+class MachOObjectFile;
 
 class SymbolRef;
 class symbol_iterator;
@@ -343,11 +345,13 @@ public:
   /// @param ObjectPath The path to the object file. ObjectPath.isObject must
   ///        return true.
   /// @brief Create ObjectFile from path.
-  static ErrorOr<ObjectFile *> createObjectFile(StringRef ObjectPath);
+  static ErrorOr<std::unique_ptr<ObjectFile>>
-  static ErrorOr<ObjectFile *>
+  createObjectFile(StringRef ObjectPath);
+
+  static ErrorOr<std::unique_ptr<ObjectFile>>
   createObjectFile(std::unique_ptr<MemoryBuffer> &Object,
                    sys::fs::file_magic Type);
-  static ErrorOr<ObjectFile *>
+  static ErrorOr<std::unique_ptr<ObjectFile>>
   createObjectFile(std::unique_ptr<MemoryBuffer> &Object) {
     return createObjectFile(Object, sys::fs::file_magic::unknown);
   }
@@ -358,11 +362,13 @@ public:
   }
 
 public:
-  static ErrorOr<ObjectFile *>
+  static ErrorOr<std::unique_ptr<COFFObjectFile>>
   createCOFFObjectFile(std::unique_ptr<MemoryBuffer> Object);
-  static ErrorOr<ObjectFile *>
+
+  static ErrorOr<std::unique_ptr<ObjectFile>>
   createELFObjectFile(std::unique_ptr<MemoryBuffer> &Object);
-  static ErrorOr<ObjectFile *>
+
+  static ErrorOr<std::unique_ptr<MachOObjectFile>>
   createMachOObjectFile(std::unique_ptr<MemoryBuffer> &Object);
 };
 

include/llvm/Object/SymbolicFile.h

@@ -142,15 +142,16 @@ public:
   }
 
   // construction aux.
-  static ErrorOr<SymbolicFile *>
+  static ErrorOr<std::unique_ptr<SymbolicFile>>
   createSymbolicFile(std::unique_ptr<MemoryBuffer> &Object,
                      sys::fs::file_magic Type, LLVMContext *Context);
 
-  static ErrorOr<SymbolicFile *>
+  static ErrorOr<std::unique_ptr<SymbolicFile>>
   createSymbolicFile(std::unique_ptr<MemoryBuffer> &Object) {
     return createSymbolicFile(Object, sys::fs::file_magic::unknown, nullptr);
   }
-  static ErrorOr<SymbolicFile *> createSymbolicFile(StringRef ObjectPath);
+  static ErrorOr<std::unique_ptr<SymbolicFile>>
+  createSymbolicFile(StringRef ObjectPath);
 
   static inline bool classof(const Binary *v) {
     return v->isSymbolic();

lib/DebugInfo/DWARFUnit.cpp

@@ -260,12 +260,12 @@ bool DWARFUnit::parseDWO() {
     sys::path::append(AbsolutePath, CompilationDir);
   }
   sys::path::append(AbsolutePath, DWOFileName);
-  ErrorOr<object::ObjectFile *> DWOFile =
+  ErrorOr<std::unique_ptr<object::ObjectFile>> DWOFile =
       object::ObjectFile::createObjectFile(AbsolutePath);
   if (!DWOFile)
     return false;
   // Reset DWOHolder.
-  DWO.reset(new DWOHolder(DWOFile.get()));
+  DWO.reset(new DWOHolder(DWOFile.get().get()));
   DWARFUnit *DWOCU = DWO->getUnit();
   // Verify that compile unit in .dwo file is valid.
   if (!DWOCU || DWOCU->getDWOId() != getDWOId()) {

lib/ExecutionEngine/RuntimeDyld/ObjectImageCommon.h

@@ -49,7 +49,7 @@ public:
     // FIXME: error checking? createObjectFile returns an ErrorOr<ObjectFile*>
     // and should probably be checked for failure.
     std::unique_ptr<MemoryBuffer> Buf(Buffer->getMemBuffer());
-    ObjFile.reset(object::ObjectFile::createObjectFile(Buf).get());
+    ObjFile = std::move(object::ObjectFile::createObjectFile(Buf).get());
   }
   ObjectImageCommon(std::unique_ptr<object::ObjectFile> Input)
   : ObjectImage(nullptr), ObjFile(std::move(Input))  {}

lib/Object/Binary.cpp

@@ -38,8 +38,9 @@ StringRef Binary::getFileName() const {
   return Data->getBufferIdentifier();
 }
 
-ErrorOr<Binary *> object::createBinary(std::unique_ptr<MemoryBuffer> Buffer,
+ErrorOr<std::unique_ptr<Binary>>
-                                       LLVMContext *Context) {
+object::createBinary(std::unique_ptr<MemoryBuffer> Buffer,
+                     LLVMContext *Context) {
   sys::fs::file_magic Type = sys::fs::identify_magic(Buffer->getBuffer());
 
   switch (Type) {
@@ -74,7 +75,7 @@ ErrorOr<Binary *> object::createBinary(std::unique_ptr<MemoryBuffer> Buffer,
   llvm_unreachable("Unexpected Binary File Type");
 }
 
-ErrorOr<Binary *> object::createBinary(StringRef Path) {
+ErrorOr<std::unique_ptr<Binary>> object::createBinary(StringRef Path) {
   ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
       MemoryBuffer::getFileOrSTDIN(Path);
   if (std::error_code EC = FileOrErr.getError())

lib/Object/COFFObjectFile.cpp

@@ -1112,12 +1112,12 @@ ExportDirectoryEntryRef::getSymbolName(StringRef &Result) const {
   return object_error::success;
 }
 
-ErrorOr<ObjectFile *>
+ErrorOr<std::unique_ptr<COFFObjectFile>>
 ObjectFile::createCOFFObjectFile(std::unique_ptr<MemoryBuffer> Object) {
   std::error_code EC;
   std::unique_ptr<COFFObjectFile> Ret(
       new COFFObjectFile(std::move(Object), EC));
   if (EC)
     return EC;
-  return Ret.release();
+  return std::move(Ret);
 }

lib/Object/ELFObjectFile.cpp

@@ -17,7 +17,7 @@
 namespace llvm {
 using namespace object;
 
-ErrorOr<ObjectFile *>
+ErrorOr<std::unique_ptr<ObjectFile>>
 ObjectFile::createELFObjectFile(std::unique_ptr<MemoryBuffer> &Obj) {
   std::pair<unsigned char, unsigned char> Ident =
       getElfArchType(Obj->getBuffer());
@@ -80,7 +80,7 @@ ObjectFile::createELFObjectFile(std::unique_ptr<MemoryBuffer> &Obj) {
 
   if (EC)
     return EC;
-  return R.release();
+  return std::move(R);
 }
 
 } // end namespace llvm

lib/Object/MachOObjectFile.cpp

@@ -1721,7 +1721,7 @@ void MachOObjectFile::ReadULEB128s(uint64_t Index,
   }
 }
 
-ErrorOr<ObjectFile *>
+ErrorOr<std::unique_ptr<MachOObjectFile>>
 ObjectFile::createMachOObjectFile(std::unique_ptr<MemoryBuffer> &Buffer) {
   StringRef Magic = Buffer->getBuffer().slice(0, 4);
   std::error_code EC;
@@ -1739,6 +1739,6 @@ ObjectFile::createMachOObjectFile(std::unique_ptr<MemoryBuffer> &Buffer) {
 
   if (EC)
     return EC;
-  return Ret.release();
+  return std::move(Ret);
 }
 

lib/Object/Object.cpp

@@ -60,9 +60,10 @@ wrap(const relocation_iterator *SI) {
 // ObjectFile creation
 LLVMObjectFileRef LLVMCreateObjectFile(LLVMMemoryBufferRef MemBuf) {
   std::unique_ptr<MemoryBuffer> Buf(unwrap(MemBuf));
-  ErrorOr<ObjectFile *> ObjOrErr(ObjectFile::createObjectFile(Buf));
+  ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr(
+      ObjectFile::createObjectFile(Buf));
   Buf.release();
-  ObjectFile *Obj = ObjOrErr ? ObjOrErr.get() : nullptr;
+  ObjectFile *Obj = ObjOrErr ? ObjOrErr.get().release() : nullptr;
   return wrap(Obj);
 }
 

lib/Object/ObjectFile.cpp

@@ -11,6 +11,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Object/COFF.h"
+#include "llvm/Object/MachO.h"
 #include "llvm/Object/ObjectFile.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/FileSystem.h"
@@ -45,7 +47,7 @@ section_iterator ObjectFile::getRelocatedSection(DataRefImpl Sec) const {
   return section_iterator(SectionRef(Sec, this));
 }
 
-ErrorOr<ObjectFile *>
+ErrorOr<std::unique_ptr<ObjectFile>>
 ObjectFile::createObjectFile(std::unique_ptr<MemoryBuffer> &Object,
                              sys::fs::file_magic Type) {
   if (Type == sys::fs::file_magic::unknown)
@@ -82,7 +84,8 @@ ObjectFile::createObjectFile(std::unique_ptr<MemoryBuffer> &Object,
   llvm_unreachable("Unexpected Object File Type");
 }
 
-ErrorOr<ObjectFile *> ObjectFile::createObjectFile(StringRef ObjectPath) {
+ErrorOr<std::unique_ptr<ObjectFile>>
+ObjectFile::createObjectFile(StringRef ObjectPath) {
   ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
       MemoryBuffer::getFile(ObjectPath);
   if (std::error_code EC = FileOrErr.getError())

lib/Object/SymbolicFile.cpp

@@ -25,7 +25,7 @@ SymbolicFile::SymbolicFile(unsigned int Type,
 
 SymbolicFile::~SymbolicFile() {}
 
-ErrorOr<SymbolicFile *>
+ErrorOr<std::unique_ptr<SymbolicFile>>
 SymbolicFile::createSymbolicFile(std::unique_ptr<MemoryBuffer> &Object,
                                  sys::fs::file_magic Type,
                                  LLVMContext *Context) {

lib/ProfileData/CoverageMappingReader.cpp

@@ -282,7 +282,7 @@ ObjectFileCoverageMappingReader::ObjectFileCoverageMappingReader(
   if (!File)
     error(File.getError());
   else
-    Object.reset(File.get());
+    Object = std::move(File.get());
 }
 
 ObjectFileCoverageMappingReader::ObjectFileCoverageMappingReader(
@@ -292,7 +292,7 @@ ObjectFileCoverageMappingReader::ObjectFileCoverageMappingReader(
   if (!File)
     error(File.getError());
   else
-    Object.reset(File.get());
+    Object = std::move(File.get());
 }
 
 namespace {

tools/lli/lli.cpp

@@ -528,13 +528,13 @@ int main(int argc, char **argv, char * const *envp) {
   }
 
   for (unsigned i = 0, e = ExtraObjects.size(); i != e; ++i) {
-    ErrorOr<object::ObjectFile *> Obj =
+    ErrorOr<std::unique_ptr<object::ObjectFile>> Obj =
         object::ObjectFile::createObjectFile(ExtraObjects[i]);
     if (!Obj) {
       Err.print(argv[0], errs());
       return 1;
     }
-    EE->addObjectFile(std::unique_ptr<object::ObjectFile>(Obj.get()));
+    EE->addObjectFile(std::move(Obj.get()));
   }
 
   for (unsigned i = 0, e = ExtraArchives.size(); i != e; ++i) {

tools/llvm-ar/llvm-ar.cpp

@@ -698,12 +698,12 @@ writeSymbolTable(raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
                                               E = Members.end();
        I != E; ++I, ++MemberNum) {
     std::unique_ptr<MemoryBuffer> &MemberBuffer = Buffers[MemberNum];
-    ErrorOr<object::SymbolicFile *> ObjOrErr =
+    ErrorOr<std::unique_ptr<object::SymbolicFile>> ObjOrErr =
         object::SymbolicFile::createSymbolicFile(
             MemberBuffer, sys::fs::file_magic::unknown, &Context);
     if (!ObjOrErr)
       continue;  // FIXME: check only for "not an object file" errors.
-    std::unique_ptr<object::SymbolicFile> Obj(ObjOrErr.get());
+    std::unique_ptr<object::SymbolicFile> Obj = std::move(ObjOrErr.get());
 
     if (!StartOffset) {
       printMemberHeader(Out, "", sys::TimeValue::now(), 0, 0, 0, 0);

tools/llvm-dwarfdump/llvm-dwarfdump.cpp

@@ -74,12 +74,13 @@ static void DumpInput(const StringRef &Filename) {
     return;
   }
 
-  ErrorOr<ObjectFile *> ObjOrErr(ObjectFile::createObjectFile(Buff.get()));
+  ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr =
+      ObjectFile::createObjectFile(Buff.get());
   if (std::error_code EC = ObjOrErr.getError()) {
     errs() << Filename << ": " << EC.message() << '\n';
     return;
   }
-  std::unique_ptr<ObjectFile> Obj(ObjOrErr.get());
+  std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get());
 
   std::unique_ptr<DIContext> DICtx(DIContext::getDWARFContext(Obj.get()));
 

tools/llvm-nm/llvm-nm.cpp

@@ -1009,11 +1009,11 @@ static void dumpSymbolNamesFromFile(std::string &Filename) {
     return;
 
   LLVMContext &Context = getGlobalContext();
-  ErrorOr<Binary *> BinaryOrErr =
+  ErrorOr<std::unique_ptr<Binary>> BinaryOrErr =
       createBinary(std::move(*BufferOrErr), &Context);
   if (error(BinaryOrErr.getError(), Filename))
     return;
-  std::unique_ptr<Binary> Bin(BinaryOrErr.get());
+  std::unique_ptr<Binary> Bin = std::move(BinaryOrErr.get());
 
   if (Archive *A = dyn_cast<Archive>(Bin.get())) {
     if (ArchiveMap) {

tools/llvm-objdump/MachODump.cpp

@@ -202,8 +202,8 @@ void llvm::DisassembleInputMachO(StringRef Filename) {
     return;
   }
 
-  std::unique_ptr<MachOObjectFile> MachOOF(static_cast<MachOObjectFile *>(
+  std::unique_ptr<MachOObjectFile> MachOOF =
-      ObjectFile::createMachOObjectFile(Buff.get()).get()));
+    std::move(ObjectFile::createMachOObjectFile(Buff.get()).get());
 
   DisassembleInputMachO2(Filename, MachOOF.get());
 }
@@ -294,7 +294,7 @@ static void DisassembleInputMachO2(StringRef Filename,
         errs() << "llvm-objdump: " << Filename << ": " << EC.message() << '\n';
         return;
       }
-      DbgObj = ObjectFile::createMachOObjectFile(Buf.get()).get();
+      DbgObj = ObjectFile::createMachOObjectFile(Buf.get()).get().release();
     }
 
     // Setup the DIContext

tools/llvm-objdump/llvm-objdump.cpp

@@ -884,12 +884,12 @@ static void DumpInput(StringRef file) {
   }
 
   // Attempt to open the binary.
-  ErrorOr<Binary *> BinaryOrErr = createBinary(file);
+  ErrorOr<std::unique_ptr<Binary>> BinaryOrErr = createBinary(file);
   if (std::error_code EC = BinaryOrErr.getError()) {
     errs() << ToolName << ": '" << file << "': " << EC.message() << ".\n";
     return;
   }
-  std::unique_ptr<Binary> binary(BinaryOrErr.get());
+  std::unique_ptr<Binary> binary = std::move(BinaryOrErr.get());
 
   if (Archive *a = dyn_cast<Archive>(binary.get()))
     DumpArchive(a);

tools/llvm-readobj/llvm-readobj.cpp

@@ -287,12 +287,12 @@ static void dumpInput(StringRef File) {
   }
 
   // Attempt to open the binary.
-  ErrorOr<Binary *> BinaryOrErr = createBinary(File);
+  ErrorOr<std::unique_ptr<Binary>> BinaryOrErr = createBinary(File);
   if (std::error_code EC = BinaryOrErr.getError()) {
     reportError(File, EC);
     return;
   }
-  std::unique_ptr<Binary> Binary(BinaryOrErr.get());
+  std::unique_ptr<Binary> Binary = std::move(BinaryOrErr.get());
 
   if (Archive *Arc = dyn_cast<Archive>(Binary.get()))
     dumpArchive(Arc);

tools/llvm-size/llvm-size.cpp

@@ -453,12 +453,12 @@ static void PrintFileSectionSizes(StringRef file) {
   }
 
   // Attempt to open the binary.
-  ErrorOr<Binary *> BinaryOrErr = createBinary(file);
+  ErrorOr<std::unique_ptr<Binary>> BinaryOrErr = createBinary(file);
   if (std::error_code EC = BinaryOrErr.getError()) {
     errs() << ToolName << ": " << file << ": " << EC.message() << ".\n";
     return;
   }
-  std::unique_ptr<Binary> binary(BinaryOrErr.get());
+  std::unique_ptr<Binary> binary = std::move(BinaryOrErr.get());
 
   if (Archive *a = dyn_cast<Archive>(binary.get())) {
     // This is an archive. Iterate over each member and display its sizes.

tools/llvm-symbolizer/LLVMSymbolize.cpp

@@ -300,9 +300,9 @@ LLVMSymbolizer::getOrCreateBinary(const std::string &Path) {
     return I->second;
   Binary *Bin = nullptr;
   Binary *DbgBin = nullptr;
-  ErrorOr<Binary *> BinaryOrErr = createBinary(Path);
+  ErrorOr<std::unique_ptr<Binary>> BinaryOrErr = createBinary(Path);
   if (!error(BinaryOrErr.getError())) {
-    std::unique_ptr<Binary> ParsedBinary(BinaryOrErr.get());
+    std::unique_ptr<Binary> ParsedBinary = std::move(BinaryOrErr.get());
     // Check if it's a universal binary.
     Bin = ParsedBinary.get();
     ParsedBinariesAndObjects.push_back(std::move(ParsedBinary));
@@ -314,8 +314,8 @@ LLVMSymbolizer::getOrCreateBinary(const std::string &Path) {
       BinaryOrErr = createBinary(ResourcePath);
       std::error_code EC = BinaryOrErr.getError();
       if (EC != errc::no_such_file_or_directory && !error(EC)) {
-        DbgBin = BinaryOrErr.get();
+        DbgBin = BinaryOrErr.get().get();
-        ParsedBinariesAndObjects.push_back(std::unique_ptr<Binary>(DbgBin));
+        ParsedBinariesAndObjects.push_back(std::move(BinaryOrErr.get()));
       }
     }
     // Try to locate the debug binary using .gnu_debuglink section.
@@ -327,8 +327,8 @@ LLVMSymbolizer::getOrCreateBinary(const std::string &Path) {
           findDebugBinary(Path, DebuglinkName, CRCHash, DebugBinaryPath)) {
         BinaryOrErr = createBinary(DebugBinaryPath);
         if (!error(BinaryOrErr.getError())) {
-          DbgBin = BinaryOrErr.get();
+          DbgBin = BinaryOrErr.get().get();
-          ParsedBinariesAndObjects.push_back(std::unique_ptr<Binary>(DbgBin));
+          ParsedBinariesAndObjects.push_back(std::move(BinaryOrErr.get()));
         }
       }
     }

tools/llvm-vtabledump/llvm-vtabledump.cpp

@@ -164,12 +164,12 @@ static void dumpInput(StringRef File) {
   }
 
   // Attempt to open the binary.
-  ErrorOr<Binary *> BinaryOrErr = createBinary(File);
+  ErrorOr<std::unique_ptr<Binary>> BinaryOrErr = createBinary(File);
   if (std::error_code EC = BinaryOrErr.getError()) {
     reportError(File, EC);
     return;
   }
-  std::unique_ptr<Binary> Binary(BinaryOrErr.get());
+  std::unique_ptr<Binary> Binary = std::move(BinaryOrErr.get());
 
   if (Archive *Arc = dyn_cast<Archive>(Binary.get()))
     dumpArchive(Arc);

tools/macho-dump/macho-dump.cpp

@@ -403,10 +403,10 @@ int main(int argc, char **argv) {
 
   cl::ParseCommandLineOptions(argc, argv, "llvm Mach-O dumping tool\n");
 
-  ErrorOr<Binary *> BinaryOrErr = createBinary(InputFile);
+  ErrorOr<std::unique_ptr<Binary>> BinaryOrErr = createBinary(InputFile);
   if (std::error_code EC = BinaryOrErr.getError())
     return Error("unable to read input: '" + EC.message() + "'");
-  std::unique_ptr<Binary> Binary(BinaryOrErr.get());
+  std::unique_ptr<Binary> Binary = std::move((BinaryOrErr.get()));
 
   const MachOObjectFile *InputObject = dyn_cast<MachOObjectFile>(Binary.get());
   if (!InputObject)

tools/obj2yaml/obj2yaml.cpp

@@ -32,11 +32,11 @@ static std::error_code dumpInput(StringRef File) {
   if (File != "-" && !sys::fs::exists(File))
     return obj2yaml_error::file_not_found;
 
-  ErrorOr<Binary *> BinaryOrErr = createBinary(File);
+  ErrorOr<std::unique_ptr<Binary>> BinaryOrErr = createBinary(File);
   if (std::error_code EC = BinaryOrErr.getError())
     return EC;
 
-  std::unique_ptr<Binary> Binary(BinaryOrErr.get());
+  std::unique_ptr<Binary> Binary = std::move(BinaryOrErr.get());
   // TODO: If this is an archive, then burst it and dump each entry
   if (ObjectFile *Obj = dyn_cast<ObjectFile>(Binary.get()))
     return dumpObject(*Obj);