1 /*

     2  * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright 2009, 2010 Red Hat, Inc.

     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     5  *

     6  * This code is free software; you can redistribute it and/or modify it

     7  * under the terms of the GNU General Public License version 2 only, as

     8  * published by the Free Software Foundation.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * or visit www.oracle.com if you need additional information or have any

    22  * questions.

    23  *

    24  */

    25 

    26 // The LLVMContext class allows multiple instances of LLVM to operate

    27 // independently of each other in a multithreaded context.  We extend

    28 // this here to store things in Shark that are LLVMContext-specific.

    29 

    30 class SharkFreeQueueItem;

    31 

    32 class SharkContext : public llvm::LLVMContext {

    33  public:

    34   SharkContext(const char* name);

    35 

    36  private:

    37   llvm::Module* _module;

    38 

    39 #if SHARK_LLVM_VERSION >= 27

    40  public:

    41 #else

    42  private:

    43 #endif

    44   llvm::Module* module() const {

    45     return _module;

    46   }

    47 

    48   // Get this thread's SharkContext

    49  public:

    50   static SharkContext& current() {

    51     return *SharkCompiler::compiler()->context();

    52   }

    53 

    54   // Module accessors

    55  public:

    56 #if SHARK_LLVM_VERSION < 27

    57   llvm::ModuleProvider* module_provider() const {

    58     return new llvm::ExistingModuleProvider(module());

    59   }

    60 #endif

    61   void add_function(llvm::Function* function) const {

    62     module()->getFunctionList().push_back(function);

    63   }

    64   llvm::Constant* get_external(const char*               name,

    65                                const llvm::FunctionType* sig) {

    66     return module()->getOrInsertFunction(name, sig);

    67   }

    68 

    69   // Basic types

    70  private:

    71   const llvm::Type*        _void_type;

    72   const llvm::IntegerType* _bit_type;

    73   const llvm::IntegerType* _jbyte_type;

    74   const llvm::IntegerType* _jshort_type;

    75   const llvm::IntegerType* _jint_type;

    76   const llvm::IntegerType* _jlong_type;

    77   const llvm::Type*        _jfloat_type;

    78   const llvm::Type*        _jdouble_type;

    79 

    80  public:

    81   const llvm::Type* void_type() const {

    82     return _void_type;

    83   }

    84   const llvm::IntegerType* bit_type() const {

    85     return _bit_type;

    86   }

    87   const llvm::IntegerType* jbyte_type() const {

    88     return _jbyte_type;

    89   }

    90   const llvm::IntegerType* jshort_type() const {

    91     return _jshort_type;

    92   }

    93   const llvm::IntegerType* jint_type() const {

    94     return _jint_type;

    95   }

    96   const llvm::IntegerType* jlong_type() const {

    97     return _jlong_type;

    98   }

    99   const llvm::Type* jfloat_type() const {

   100     return _jfloat_type;

   101   }

   102   const llvm::Type* jdouble_type() const {

   103     return _jdouble_type;

   104   }

   105   const llvm::IntegerType* intptr_type() const {

   106     return LP64_ONLY(jlong_type()) NOT_LP64(jint_type());

   107   }

   108 

   109   // Compound types

   110  private:

   111   const llvm::PointerType*  _itableOffsetEntry_type;

   112   const llvm::PointerType*  _jniEnv_type;

   113   const llvm::PointerType*  _jniHandleBlock_type;

   114   const llvm::PointerType*  _klass_type;

   115   const llvm::PointerType*  _methodOop_type;

   116   const llvm::ArrayType*    _monitor_type;

   117   const llvm::PointerType*  _oop_type;

   118   const llvm::PointerType*  _thread_type;

   119   const llvm::PointerType*  _zeroStack_type;

   120   const llvm::FunctionType* _entry_point_type;

   121   const llvm::FunctionType* _osr_entry_point_type;

   122 

   123  public:

   124   const llvm::PointerType* itableOffsetEntry_type() const {

   125     return _itableOffsetEntry_type;

   126   }

   127   const llvm::PointerType* jniEnv_type() const {

   128     return _jniEnv_type;

   129   }

   130   const llvm::PointerType* jniHandleBlock_type() const {

   131     return _jniHandleBlock_type;

   132   }

   133   const llvm::PointerType* klass_type() const {

   134     return _klass_type;

   135   }

   136   const llvm::PointerType* methodOop_type() const {

   137     return _methodOop_type;

   138   }

   139   const llvm::ArrayType* monitor_type() const {

   140     return _monitor_type;

   141   }

   142   const llvm::PointerType* oop_type() const {

   143     return _oop_type;

   144   }

   145   const llvm::PointerType* thread_type() const {

   146     return _thread_type;

   147   }

   148   const llvm::PointerType* zeroStack_type() const {

   149     return _zeroStack_type;

   150   }

   151   const llvm::FunctionType* entry_point_type() const {

   152     return _entry_point_type;

   153   }

   154   const llvm::FunctionType* osr_entry_point_type() const {

   155     return _osr_entry_point_type;

   156   }

   157 

   158   // Mappings

   159  private:

   160   const llvm::Type* _to_stackType[T_CONFLICT];

   161   const llvm::Type* _to_arrayType[T_CONFLICT];

   162 

   163  private:

   164   const llvm::Type* map_type(const llvm::Type* const* table,

   165                              BasicType                type) const {

   166     assert(type >= 0 && type < T_CONFLICT, "unhandled type");

   167     const llvm::Type* result = table[type];

   168     assert(type != NULL, "unhandled type");

   169     return result;

   170   }

   171 

   172  public:

   173   const llvm::Type* to_stackType(BasicType type) const {

   174     return map_type(_to_stackType, type);

   175   }

   176   const llvm::Type* to_arrayType(BasicType type) const {

   177     return map_type(_to_arrayType, type);

   178   }

   179 

   180   // Functions queued for freeing

   181  private:

   182   SharkFreeQueueItem* _free_queue;

   183 

   184  public:

   185   void push_to_free_queue(llvm::Function* function);

   186   llvm::Function* pop_from_free_queue();

   187 };