Enable exception handling int JIT

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47079 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/ExecutionEngine/ExecutionEngine.h

@@ -85,6 +85,11 @@ protected:
   /// pointer is invoked to create it. If this returns null, the JIT will abort.
   void* (*LazyFunctionCreator)(const std::string &);
   
+  /// ExceptionTableRegister - If Exception Handling is set, the JIT will 
+  /// register dwarf tables with this function
+  typedef void (*EERegisterFn)(void*);
+  static EERegisterFn ExceptionTableRegister;
+
 public:
   /// lock - This lock is protects the ExecutionEngine, JIT, JITResolver and
   /// JITEmitter classes.  It must be held while changing the internal state of
@@ -246,6 +251,19 @@ public:
   void InstallLazyFunctionCreator(void* (*P)(const std::string &)) {
     LazyFunctionCreator = P;
   }
+  
+  /// InstallExceptionTableRegister - The JIT will use the given function
+  /// to register the exception tables it generates.
+  static void InstallExceptionTableRegister(void (*F)(void*)) {
+    ExceptionTableRegister = F;
+  }
+  
+  /// RegisterTable - Registers the given pointer as an exception table. It uses
+  /// the ExceptionTableRegister function.
+  static void RegisterTable(void* res) {
+    if (ExceptionTableRegister)
+      ExceptionTableRegister(res);
+  }
 
 protected:
   explicit ExecutionEngine(ModuleProvider *P);

include/llvm/ExecutionEngine/JITMemoryManager.h

@@ -89,6 +89,17 @@ public:
   /// deallocateMemForFunction - Free JIT memory for the specified function.
   /// This is never called when the JIT is currently emitting a function.
   virtual void deallocateMemForFunction(const Function *F) = 0;
+  
+  /// startExceptionTable - When we finished JITing the function, if exception
+  /// handling is set, we emit the exception table.
+  virtual unsigned char* startExceptionTable(const Function* F,
+                                             uintptr_t &ActualSize) = 0;
+  
+  /// endExceptionTable - This method is called when the JIT is done emitting
+  /// the exception table.
+  virtual void endExceptionTable(const Function *F, unsigned char *TableStart,
+                                 unsigned char *TableEnd, 
+                                 unsigned char* FrameRegister) = 0;
 };
 
 } // end namespace llvm.