--- /dev/null	2010-06-22 09:23:59.198002222 +0100
+++ new/hotspot/src/share/vm/shark/sharkContext.hpp	2010-06-22 09:53:11.000000000 +0100
@@ -0,0 +1,187 @@
+/*
+ * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
+ * Copyright 2009, 2010 Red Hat, Inc.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+// The LLVMContext class allows multiple instances of LLVM to operate
+// independently of each other in a multithreaded context.  We extend
+// this here to store things in Shark that are LLVMContext-specific.
+
+class SharkFreeQueueItem;
+
+class SharkContext : public llvm::LLVMContext {
+ public:
+  SharkContext(const char* name);
+
+ private:
+  llvm::Module* _module;
+
+#if SHARK_LLVM_VERSION >= 27
+ public:
+#else
+ private:
+#endif
+  llvm::Module* module() const {
+    return _module;
+  }
+
+  // Get this thread's SharkContext
+ public:
+  static SharkContext& current() {
+    return *SharkCompiler::compiler()->context();
+  }
+
+  // Module accessors
+ public:
+#if SHARK_LLVM_VERSION < 27
+  llvm::ModuleProvider* module_provider() const {
+    return new llvm::ExistingModuleProvider(module());
+  }
+#endif
+  void add_function(llvm::Function* function) const {
+    module()->getFunctionList().push_back(function);
+  }
+  llvm::Constant* get_external(const char*               name,
+                               const llvm::FunctionType* sig) {
+    return module()->getOrInsertFunction(name, sig);
+  }
+
+  // Basic types
+ private:
+  const llvm::Type*        _void_type;
+  const llvm::IntegerType* _bit_type;
+  const llvm::IntegerType* _jbyte_type;
+  const llvm::IntegerType* _jshort_type;
+  const llvm::IntegerType* _jint_type;
+  const llvm::IntegerType* _jlong_type;
+  const llvm::Type*        _jfloat_type;
+  const llvm::Type*        _jdouble_type;
+
+ public:
+  const llvm::Type* void_type() const {
+    return _void_type;
+  }
+  const llvm::IntegerType* bit_type() const {
+    return _bit_type;
+  }
+  const llvm::IntegerType* jbyte_type() const {
+    return _jbyte_type;
+  }
+  const llvm::IntegerType* jshort_type() const {
+    return _jshort_type;
+  }
+  const llvm::IntegerType* jint_type() const {
+    return _jint_type;
+  }
+  const llvm::IntegerType* jlong_type() const {
+    return _jlong_type;
+  }
+  const llvm::Type* jfloat_type() const {
+    return _jfloat_type;
+  }
+  const llvm::Type* jdouble_type() const {
+    return _jdouble_type;
+  }
+  const llvm::IntegerType* intptr_type() const {
+    return LP64_ONLY(jlong_type()) NOT_LP64(jint_type());
+  }
+
+  // Compound types
+ private:
+  const llvm::PointerType*  _itableOffsetEntry_type;
+  const llvm::PointerType*  _jniEnv_type;
+  const llvm::PointerType*  _jniHandleBlock_type;
+  const llvm::PointerType*  _klass_type;
+  const llvm::PointerType*  _methodOop_type;
+  const llvm::ArrayType*    _monitor_type;
+  const llvm::PointerType*  _oop_type;
+  const llvm::PointerType*  _thread_type;
+  const llvm::PointerType*  _zeroStack_type;
+  const llvm::FunctionType* _entry_point_type;
+  const llvm::FunctionType* _osr_entry_point_type;
+
+ public:
+  const llvm::PointerType* itableOffsetEntry_type() const {
+    return _itableOffsetEntry_type;
+  }
+  const llvm::PointerType* jniEnv_type() const {
+    return _jniEnv_type;
+  }
+  const llvm::PointerType* jniHandleBlock_type() const {
+    return _jniHandleBlock_type;
+  }
+  const llvm::PointerType* klass_type() const {
+    return _klass_type;
+  }
+  const llvm::PointerType* methodOop_type() const {
+    return _methodOop_type;
+  }
+  const llvm::ArrayType* monitor_type() const {
+    return _monitor_type;
+  }
+  const llvm::PointerType* oop_type() const {
+    return _oop_type;
+  }
+  const llvm::PointerType* thread_type() const {
+    return _thread_type;
+  }
+  const llvm::PointerType* zeroStack_type() const {
+    return _zeroStack_type;
+  }
+  const llvm::FunctionType* entry_point_type() const {
+    return _entry_point_type;
+  }
+  const llvm::FunctionType* osr_entry_point_type() const {
+    return _osr_entry_point_type;
+  }
+
+  // Mappings
+ private:
+  const llvm::Type* _to_stackType[T_CONFLICT];
+  const llvm::Type* _to_arrayType[T_CONFLICT];
+
+ private:
+  const llvm::Type* map_type(const llvm::Type* const* table,
+                             BasicType                type) const {
+    assert(type >= 0 && type < T_CONFLICT, "unhandled type");
+    const llvm::Type* result = table[type];
+    assert(type != NULL, "unhandled type");
+    return result;
+  }
+
+ public:
+  const llvm::Type* to_stackType(BasicType type) const {
+    return map_type(_to_stackType, type);
+  }
+  const llvm::Type* to_arrayType(BasicType type) const {
+    return map_type(_to_arrayType, type);
+  }
+
+  // Functions queued for freeing
+ private:
+  SharkFreeQueueItem* _free_queue;
+
+ public:
+  void push_to_free_queue(llvm::Function* function);
+  llvm::Function* pop_from_free_queue();
+};