Roll out r182411 and 182412 because it's still broken.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182415 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 52 insertions, 1 deletions

diff --git a/include/llvm/ExecutionEngine/RuntimeDyld.h b/include/llvm/ExecutionEngine/RuntimeDyld.h
index 1a57317..7dba040 100644
--- a/include/llvm/ExecutionEngine/RuntimeDyld.h
+++ b/include/llvm/ExecutionEngine/RuntimeDyld.h
@@ -16,7 +16,6 @@
 
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ExecutionEngine/ObjectBuffer.h"
-#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
 #include "llvm/Support/Memory.h"
 
 namespace llvm {
@@ -24,6 +23,58 @@ namespace llvm {
 class RuntimeDyldImpl;
 class ObjectImage;
 
+// RuntimeDyld clients often want to handle the memory management of
+// what gets placed where. For JIT clients, this is the subset of
+// JITMemoryManager required for dynamic loading of binaries.
+//
+// FIXME: As the RuntimeDyld fills out, additional routines will be needed
+//        for the varying types of objects to be allocated.
+class RTDyldMemoryManager {
+  RTDyldMemoryManager(const RTDyldMemoryManager&) LLVM_DELETED_FUNCTION;
+  void operator=(const RTDyldMemoryManager&) LLVM_DELETED_FUNCTION;
+public:
+  RTDyldMemoryManager() {}
+  virtual ~RTDyldMemoryManager();
+
+  /// Allocate a memory block of (at least) the given size suitable for
+  /// executable code. The SectionID is a unique identifier assigned by the JIT
+  /// engine, and optionally recorded by the memory manager to access a loaded
+  /// section.
+  virtual uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
+                                       unsigned SectionID) = 0;
+
+  /// Allocate a memory block of (at least) the given size suitable for data.
+  /// The SectionID is a unique identifier assigned by the JIT engine, and
+  /// optionally recorded by the memory manager to access a loaded section.
+  virtual uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
+                                       unsigned SectionID, bool IsReadOnly) = 0;
+
+  /// This method returns the address of the specified function. As such it is
+  /// only useful for resolving library symbols, not code generated symbols.
+  ///
+  /// If AbortOnFailure is false and no function with the given name is
+  /// found, this function returns a null pointer. Otherwise, it prints a
+  /// message to stderr and aborts.
+  virtual void *getPointerToNamedFunction(const std::string &Name,
+                                          bool AbortOnFailure = true) = 0;
+
+  /// This method is called when object loading is complete and section page
+  /// permissions can be applied.  It is up to the memory manager implementation
+  /// to decide whether or not to act on this method.  The memory manager will
+  /// typically allocate all sections as read-write and then apply specific
+  /// permissions when this method is called.  Code sections cannot be executed
+  /// until this function has been called.  In addition, any cache coherency
+  /// operations needed to reliably use the memory are also performed.
+  ///
+  /// Returns true if an error occurred, false otherwise.
+  virtual bool finalizeMemory(std::string *ErrMsg = 0) = 0;
+
+  /// Register the EH frames with the runtime so that c++ exceptions work. The
+  /// default implementation does nothing. Look at SectionMemoryManager for one
+  /// that uses __register_frame.
+  virtual void registerEHFrames(StringRef SectionData);
+};
+
 class RuntimeDyld {
   RuntimeDyld(const RuntimeDyld &) LLVM_DELETED_FUNCTION;
   void operator=(const RuntimeDyld &) LLVM_DELETED_FUNCTION;