X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FExecutionEngine%2FRuntimeDyld.h;h=720429e7b5c03e79877ded56ea91214f98573072;hb=b7387a07d049a4024f80c0e09dba179984f8618d;hp=a02cbe2d908b14e87e74be06eb14e1cb0761ce13;hpb=c2945e44d5d485ce080a09900fbd5245e01165fc;p=oota-llvm.git

diff --git a/include/llvm/ExecutionEngine/RuntimeDyld.h b/include/llvm/ExecutionEngine/RuntimeDyld.h
index a02cbe2d908..720429e7b5c 100644
--- a/include/llvm/ExecutionEngine/RuntimeDyld.h
+++ b/include/llvm/ExecutionEngine/RuntimeDyld.h
@@ -11,82 +11,117 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_RUNTIME_DYLD_H
-#define LLVM_RUNTIME_DYLD_H
+#ifndef LLVM_EXECUTIONENGINE_RUNTIMEDYLD_H
+#define LLVM_EXECUTIONENGINE_RUNTIMEDYLD_H
 
 #include "llvm/ADT/StringRef.h"
+#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
 #include "llvm/Support/Memory.h"
+#include <memory>
 
 namespace llvm {
 
-class RuntimeDyldImpl;
-class MemoryBuffer;
-
-// RuntimeDyld clients often want to handle the memory management of
-// what gets placed where. For JIT clients, this is an abstraction layer
-// over the JITMemoryManager, which references objects by their source
-// representations in LLVM IR.
-// 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();
-
-  /// allocateCodeSection - Allocate a memory block of (at least) the given
-  /// size suitable for executable code.
-  virtual uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
-                                       unsigned SectionID) = 0;
+namespace object {
+  class ObjectFile;
+  template <typename T> class OwningBinary;
+}
 
-  /// allocateDataSection - Allocate a memory block of (at least) the given
-  /// size suitable for data.
-  virtual uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
-                                       unsigned SectionID) = 0;
-
-  virtual void *getPointerToNamedFunction(const std::string &Name,
-                                          bool AbortOnFailure = true) = 0;
-};
+class RuntimeDyldImpl;
+class RuntimeDyldCheckerImpl;
 
 class RuntimeDyld {
+  friend class RuntimeDyldCheckerImpl;
+
   RuntimeDyld(const RuntimeDyld &) LLVM_DELETED_FUNCTION;
   void operator=(const RuntimeDyld &) LLVM_DELETED_FUNCTION;
 
   // RuntimeDyldImpl is the actual class. RuntimeDyld is just the public
   // interface.
-  RuntimeDyldImpl *Dyld;
+  std::unique_ptr<RuntimeDyldImpl> Dyld;
   RTDyldMemoryManager *MM;
+  bool ProcessAllSections;
+  RuntimeDyldCheckerImpl *Checker;
 protected:
   // Change the address associated with a section when resolving relocations.
   // Any relocations already associated with the symbol will be re-resolved.
   void reassignSectionAddress(unsigned SectionID, uint64_t Addr);
 public:
-  RuntimeDyld(RTDyldMemoryManager*);
+
+  /// \brief Information about the loaded object.
+  class LoadedObjectInfo {
+    friend class RuntimeDyldImpl;
+  public:
+    LoadedObjectInfo(RuntimeDyldImpl &RTDyld, unsigned BeginIdx,
+                     unsigned EndIdx)
+      : RTDyld(RTDyld), BeginIdx(BeginIdx), EndIdx(EndIdx) { }
+
+    virtual ~LoadedObjectInfo() {}
+
+    virtual object::OwningBinary<object::ObjectFile>
+    getObjectForDebug(const object::ObjectFile &Obj) const = 0;
+
+    uint64_t getSectionLoadAddress(StringRef Name) const;
+
+  protected:
+    virtual void anchor();
+
+    RuntimeDyldImpl &RTDyld;
+    unsigned BeginIdx, EndIdx;
+  };
+
+  RuntimeDyld(RTDyldMemoryManager *);
   ~RuntimeDyld();
 
-  /// Load an in-memory object file into the dynamic linker.
-  bool loadObject(MemoryBuffer *InputBuffer);
+  /// Add the referenced object file to the list of objects to be loaded and
+  /// relocated.
+  std::unique_ptr<LoadedObjectInfo> loadObject(const object::ObjectFile &O);
 
   /// Get the address of our local copy of the symbol. This may or may not
   /// be the address used for relocation (clients can copy the data around
   /// and resolve relocatons based on where they put it).
-  void *getSymbolAddress(StringRef Name);
+  void *getSymbolAddress(StringRef Name) const;
 
-  /// Get the address of the target copy of the symbol. This is the address
-  /// used for relocation.
-  uint64_t getSymbolLoadAddress(StringRef Name);
+  /// Get the address of the target copy of the symbol (works for both exported
+  /// and non-exported symbols). This is the address used for relocation.
+  uint64_t getSymbolLoadAddress(StringRef Name) const;
+
+  /// Get the address of the target copy of the symbol (works for exported
+  /// symbols only). This is the address used for relocation.
+  uint64_t getExportedSymbolLoadAddress(StringRef Name) const;
 
   /// Resolve the relocations for all symbols we currently know about.
   void resolveRelocations();
 
-  /// mapSectionAddress - map a section to its target address space value.
+  /// Map a section to its target address space value.
   /// Map the address of a JIT section as returned from the memory manager
   /// to the address in the target process as the running code will see it.
   /// This is the address which will be used for relocation resolution.
   void mapSectionAddress(const void *LocalAddress, uint64_t TargetAddress);
 
+  /// Register any EH frame sections that have been loaded but not previously
+  /// registered with the memory manager.  Note, RuntimeDyld is responsible
+  /// for identifying the EH frame and calling the memory manager with the
+  /// EH frame section data.  However, the memory manager itself will handle
+  /// the actual target-specific EH frame registration.
+  void registerEHFrames();
+
+  void deregisterEHFrames();
+
+  bool hasError();
   StringRef getErrorString();
+
+  /// By default, only sections that are "required for execution" are passed to
+  /// the RTDyldMemoryManager, and other sections are discarded. Passing 'true'
+  /// to this method will cause RuntimeDyld to pass all sections to its
+  /// memory manager regardless of whether they are "required to execute" in the
+  /// usual sense. This is useful for inspecting metadata sections that may not
+  /// contain relocations, E.g. Debug info, stackmaps.
+  ///
+  /// Must be called before the first object file is loaded.
+  void setProcessAllSections(bool ProcessAllSections) {
+    assert(!Dyld && "setProcessAllSections must be called before loadObject.");
+    this->ProcessAllSections = ProcessAllSections;
+  }
 };
 
 } // end namespace llvm