Make createObjectImage and createObjectImageFromFile static methods on the

relevant subclasses of RuntimeDyldImpl. This allows construction of
RuntimeDyldImpl instances to be deferred until after the target architecture is
known.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203352 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 70 insertions, 74 deletions

diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
index d45b47218a..723a790b87 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
@@ -75,25 +75,7 @@ void RuntimeDyldImpl::mapSectionAddress(const void *LocalAddress,
   llvm_unreachable("Attempting to remap address of unknown section!");
 }
 
-// Subclasses can implement this method to create specialized image instances.
-// The caller owns the pointer that is returned.
-ObjectImage *RuntimeDyldImpl::createObjectImage(ObjectBuffer *InputBuffer) {
-  return new ObjectImageCommon(InputBuffer);
-}
-
-ObjectImage *RuntimeDyldImpl::createObjectImageFromFile(ObjectFile *InputObject) {
-  return new ObjectImageCommon(InputObject);
-}
-
-ObjectImage *RuntimeDyldImpl::loadObject(ObjectFile *InputObject) {
-  return loadObject(createObjectImageFromFile(InputObject));
-}
-
-ObjectImage *RuntimeDyldImpl::loadObject(ObjectBuffer *InputBuffer) {
-  return loadObject(createObjectImage(InputBuffer));
-} 
-
-ObjectImage *RuntimeDyldImpl::loadObject(ObjectImage *InputObject) {
+ObjectImage* RuntimeDyldImpl::loadObject(ObjectImage *InputObject) {
   MutexGuard locked(lock);
 
   std::unique_ptr<ObjectImage> Obj(InputObject);
@@ -155,7 +137,7 @@ ObjectImage *RuntimeDyldImpl::loadObject(ObjectImage *InputObject) {
         if (SI == Obj->end_sections()) continue;
         Check(SI->getContents(SectionData));
         Check(SI->isText(IsCode));
-        const uint8_t* SymPtr = (const uint8_t*)InputObject->getData().data() +
+        const uint8_t* SymPtr = (const uint8_t*)Obj->getData().data() +
                                 (uintptr_t)FileOffset;
         uintptr_t SectOffset = (uintptr_t)(SymPtr -
                                            (const uint8_t*)SectionData.begin());
@@ -693,60 +675,70 @@ RuntimeDyld::~RuntimeDyld() {
 }
 
 ObjectImage *RuntimeDyld::loadObject(ObjectFile *InputObject) {
-  if (!Dyld) {
-    if (InputObject->isELF())
+  std::unique_ptr<ObjectImage> InputImage;
+
+  if (InputObject->isELF()) {
+    InputImage.reset(RuntimeDyldELF::createObjectImageFromFile(InputObject));
+    if (!Dyld)
       Dyld = new RuntimeDyldELF(MM);
-    else if (InputObject->isMachO())
+  } else if (InputObject->isMachO()) {
+    InputImage.reset(RuntimeDyldMachO::createObjectImageFromFile(InputObject));
+    if (!Dyld)
       Dyld = new RuntimeDyldMachO(MM);
-    else
-      report_fatal_error("Incompatible object format!");
-  } else {
-    if (!Dyld->isCompatibleFile(InputObject))
-      report_fatal_error("Incompatible object format!");
-  }
+  } else
+    report_fatal_error("Incompatible object format!");
+
+  if (!Dyld->isCompatibleFile(InputObject))
+    report_fatal_error("Incompatible object format!");
 
-  return Dyld->loadObject(InputObject);
+  Dyld->loadObject(InputImage.get());
+  return InputImage.release();
 }
 
 ObjectImage *RuntimeDyld::loadObject(ObjectBuffer *InputBuffer) {
-  if (!Dyld) {
-    sys::fs::file_magic Type =
-        sys::fs::identify_magic(InputBuffer->getBuffer());
-    switch (Type) {
-    case sys::fs::file_magic::elf_relocatable:
-    case sys::fs::file_magic::elf_executable:
-    case sys::fs::file_magic::elf_shared_object:
-    case sys::fs::file_magic::elf_core:
+  std::unique_ptr<ObjectImage> InputImage;
+  sys::fs::file_magic Type =
+    sys::fs::identify_magic(InputBuffer->getBuffer());
+
+  switch (Type) {
+  case sys::fs::file_magic::elf_relocatable:
+  case sys::fs::file_magic::elf_executable:
+  case sys::fs::file_magic::elf_shared_object:
+  case sys::fs::file_magic::elf_core:
+    InputImage.reset(RuntimeDyldELF::createObjectImage(InputBuffer));
+    if (!Dyld)
       Dyld = new RuntimeDyldELF(MM);
-      break;
-    case sys::fs::file_magic::macho_object:
-    case sys::fs::file_magic::macho_executable:
-    case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
-    case sys::fs::file_magic::macho_core:
-    case sys::fs::file_magic::macho_preload_executable:
-    case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
-    case sys::fs::file_magic::macho_dynamic_linker:
-    case sys::fs::file_magic::macho_bundle:
-    case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
-    case sys::fs::file_magic::macho_dsym_companion:
+    break;
+  case sys::fs::file_magic::macho_object:
+  case sys::fs::file_magic::macho_executable:
+  case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
+  case sys::fs::file_magic::macho_core:
+  case sys::fs::file_magic::macho_preload_executable:
+  case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
+  case sys::fs::file_magic::macho_dynamic_linker:
+  case sys::fs::file_magic::macho_bundle:
+  case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
+  case sys::fs::file_magic::macho_dsym_companion:
+    InputImage.reset(RuntimeDyldMachO::createObjectImage(InputBuffer));
+    if (!Dyld)
       Dyld = new RuntimeDyldMachO(MM);
-      break;
-    case sys::fs::file_magic::unknown:
-    case sys::fs::file_magic::bitcode:
-    case sys::fs::file_magic::archive:
-    case sys::fs::file_magic::coff_object:
-    case sys::fs::file_magic::coff_import_library:
-    case sys::fs::file_magic::pecoff_executable:
-    case sys::fs::file_magic::macho_universal_binary:
-    case sys::fs::file_magic::windows_resource:
-      report_fatal_error("Incompatible object format!");
-    }
-  } else {
-    if (!Dyld->isCompatibleFormat(InputBuffer))
-      report_fatal_error("Incompatible object format!");
+    break;
+  case sys::fs::file_magic::unknown:
+  case sys::fs::file_magic::bitcode:
+  case sys::fs::file_magic::archive:
+  case sys::fs::file_magic::coff_object:
+  case sys::fs::file_magic::coff_import_library:
+  case sys::fs::file_magic::pecoff_executable:
+  case sys::fs::file_magic::macho_universal_binary:
+  case sys::fs::file_magic::windows_resource:
+    report_fatal_error("Incompatible object format!");
   }
 
-  return Dyld->loadObject(InputBuffer);
+  if (!Dyld->isCompatibleFormat(InputBuffer))
+    report_fatal_error("Incompatible object format!");
+
+  Dyld->loadObject(InputImage.get());
+  return InputImage.release();
 }
 
 void *RuntimeDyld::getSymbolAddress(StringRef Name) {
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.h b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.h
index 707940ec33..f7f43b4069 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.h
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.h
@@ -139,12 +139,13 @@ public:
                             StubMap &Stubs) override;
   bool isCompatibleFormat(const ObjectBuffer *Buffer) const override;
   bool isCompatibleFile(const object::ObjectFile *Buffer) const override;
-  ObjectImage *createObjectImage(ObjectBuffer *InputBuffer) override;
-  ObjectImage *createObjectImageFromFile(object::ObjectFile *Obj) override;
   void registerEHFrames() override;
   void deregisterEHFrames() override;
   void finalizeLoad(ObjSectionToIDMap &SectionMap) override;
   virtual ~RuntimeDyldELF();
+
+  static ObjectImage *createObjectImage(ObjectBuffer *InputBuffer);
+  static ObjectImage *createObjectImageFromFile(object::ObjectFile *Obj);
 };
 
 } // end namespace llvm
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
index 9a9e360d4f..8fd55920f2 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
@@ -310,9 +310,6 @@ protected:
   // The base class does nothing.  ELF overrides this.
   virtual void updateGOTEntries(StringRef Name, uint64_t Addr) {}
 
-  virtual ObjectImage *createObjectImage(ObjectBuffer *InputBuffer);
-  virtual ObjectImage *createObjectImageFromFile(object::ObjectFile *InputObject);
-
   // \brief Compute an upper bound of the memory that is required to load all sections
   void computeTotalAllocSize(ObjectImage &Obj, 
                              uint64_t& CodeSize, 
@@ -322,16 +319,12 @@ protected:
   // \brief Compute the stub buffer size required for a section
   unsigned computeSectionStubBufSize(ObjectImage &Obj, const SectionRef &Section); 
 
-  // This is the implementation for the two public overloads
-  ObjectImage *loadObject(ObjectImage *InputObject);
-
 public:
   RuntimeDyldImpl(RTDyldMemoryManager *mm) : MemMgr(mm), HasError(false) {}
 
   virtual ~RuntimeDyldImpl();
 
-  ObjectImage *loadObject(ObjectBuffer *InputBuffer);
-  ObjectImage *loadObject(object::ObjectFile *InputObject);
+  ObjectImage* loadObject(ObjectImage* InputObject);
 
   void *getSymbolAddress(StringRef Name) {
     // FIXME: Just look up as a function for now. Overly simple of course.
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
index bddf37958f..1a285ffbfb 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
@@ -14,6 +14,7 @@
 #ifndef LLVM_RUNTIME_DYLD_MACHO_H
 #define LLVM_RUNTIME_DYLD_MACHO_H
 
+#include "ObjectImageCommon.h"
 #include "RuntimeDyldImpl.h"
 #include "llvm/ADT/IndexedMap.h"
 #include "llvm/Object/MachO.h"
@@ -95,6 +96,15 @@ public:
   bool isCompatibleFile(const object::ObjectFile *Obj) const override;
   void registerEHFrames() override;
   void finalizeLoad(ObjSectionToIDMap &SectionMap) override;
+
+
+  static ObjectImage *createObjectImage(ObjectBuffer *InputBuffer) {
+    return new ObjectImageCommon(InputBuffer);
+  }
+
+  static ObjectImage *createObjectImageFromFile(object::ObjectFile *InputObject) {
+    return new ObjectImageCommon(InputObject);
+  }
 };
 
 } // end namespace llvm