1 /*
   2  * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 #ifndef SHARE_VM_JVMCI_JVMCI_COMPILER_TO_VM_HPP
  25 #define SHARE_VM_JVMCI_JVMCI_COMPILER_TO_VM_HPP
  26 
  27 #include "prims/jni.h"
  28 #include "runtime/javaCalls.hpp"
  29 #include "jvmci/jvmciJavaClasses.hpp"
  30 
  31 class CompilerToVM {
  32 public:
  33   /**
  34    * Tag bits used by lookupKlassInPool to distinguish the types in Java.
  35    */
  36   enum Tags {
  37     KLASS_TAG = 0x0,
  38     SYMBOL_TAG = 0x1
  39   };
  40 
  41   // FIXME This is only temporary until the GC code is changed.
  42   static bool _supports_inline_contig_alloc;
  43   static HeapWord** _heap_end_addr;
  44   static HeapWord** _heap_top_addr;
  45 
  46   static intptr_t tag_pointer(Klass* klass) {
  47     return ((intptr_t) klass) | KLASS_TAG;
  48   }
  49 
  50   static intptr_t tag_pointer(Symbol* symbol) {
  51     return ((intptr_t) symbol) | SYMBOL_TAG;
  52   }
  53 
  54   static JNINativeMethod methods[];
  55   static int methods_count();
  56   
  57   static inline Method* asMethod(jobject jvmci_method) {
  58     return (Method*) (address) HotSpotResolvedJavaMethodImpl::metaspaceMethod(jvmci_method);
  59   }
  60   
  61   static inline Method* asMethod(Handle jvmci_method) {
  62     return (Method*) (address) HotSpotResolvedJavaMethodImpl::metaspaceMethod(jvmci_method);
  63   }
  64   
  65   static inline Method* asMethod(oop jvmci_method) {
  66     return (Method*) (address) HotSpotResolvedJavaMethodImpl::metaspaceMethod(jvmci_method);
  67   }
  68   
  69   static inline ConstantPool* asConstantPool(jobject jvmci_constant_pool) {
  70     return (ConstantPool*) (address) HotSpotConstantPool::metaspaceConstantPool(jvmci_constant_pool);
  71   }
  72   
  73   static inline ConstantPool* asConstantPool(Handle jvmci_constant_pool) {
  74     return (ConstantPool*) (address) HotSpotConstantPool::metaspaceConstantPool(jvmci_constant_pool);
  75   }
  76   
  77   static inline ConstantPool* asConstantPool(oop jvmci_constant_pool) {
  78     return (ConstantPool*) (address) HotSpotConstantPool::metaspaceConstantPool(jvmci_constant_pool);
  79   }
  80   
  81   static inline Klass* asKlass(jobject jvmci_type) {
  82     return java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(jvmci_type));
  83   }
  84 
  85   static inline Klass* asKlass(Handle jvmci_type) {
  86     return java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(jvmci_type));
  87   }
  88   
  89   static inline Klass* asKlass(oop jvmci_type) {
  90     return java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(jvmci_type));
  91   }
  92   
  93   static inline MethodData* asMethodData(jlong metaspaceMethodData) {
  94     return (MethodData*) (address) metaspaceMethodData;
  95   }
  96   
  97   static oop get_jvmci_method(methodHandle method, TRAPS);
  98 
  99   static oop get_jvmci_type(KlassHandle klass, TRAPS);
 100 };
 101 
 102 class JavaArgumentUnboxer : public SignatureIterator {
 103  protected:
 104   JavaCallArguments*  _jca;
 105   arrayOop _args;
 106   int _index;
 107 
 108   oop next_arg(BasicType expectedType) {
 109     assert(_index < _args->length(), "out of bounds");
 110     oop arg=((objArrayOop) (_args))->obj_at(_index++);
 111     assert(expectedType == T_OBJECT || java_lang_boxing_object::is_instance(arg, expectedType), "arg type mismatch");
 112     return arg;
 113   }
 114 
 115  public:
 116   JavaArgumentUnboxer(Symbol* signature, JavaCallArguments*  jca, arrayOop args, bool is_static) : SignatureIterator(signature) {
 117     this->_return_type = T_ILLEGAL;
 118     _jca = jca;
 119     _index = 0;
 120     _args = args;
 121     if (!is_static) {
 122       _jca->push_oop(next_arg(T_OBJECT));
 123     }
 124     iterate();
 125     assert(_index == args->length(), "arg count mismatch with signature");
 126   }
 127 
 128   inline void do_bool()   { if (!is_return_type()) _jca->push_int(next_arg(T_BOOLEAN)->bool_field(java_lang_boxing_object::value_offset_in_bytes(T_BOOLEAN))); }
 129   inline void do_char()   { if (!is_return_type()) _jca->push_int(next_arg(T_CHAR)->char_field(java_lang_boxing_object::value_offset_in_bytes(T_CHAR))); }
 130   inline void do_short()  { if (!is_return_type()) _jca->push_int(next_arg(T_SHORT)->short_field(java_lang_boxing_object::value_offset_in_bytes(T_SHORT))); }
 131   inline void do_byte()   { if (!is_return_type()) _jca->push_int(next_arg(T_BYTE)->byte_field(java_lang_boxing_object::value_offset_in_bytes(T_BYTE))); }
 132   inline void do_int()    { if (!is_return_type()) _jca->push_int(next_arg(T_INT)->int_field(java_lang_boxing_object::value_offset_in_bytes(T_INT))); }
 133 
 134   inline void do_long()   { if (!is_return_type()) _jca->push_long(next_arg(T_LONG)->long_field(java_lang_boxing_object::value_offset_in_bytes(T_LONG))); }
 135   inline void do_float()  { if (!is_return_type()) _jca->push_float(next_arg(T_FLOAT)->float_field(java_lang_boxing_object::value_offset_in_bytes(T_FLOAT))); }
 136   inline void do_double() { if (!is_return_type()) _jca->push_double(next_arg(T_DOUBLE)->double_field(java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE))); }
 137 
 138   inline void do_object() { _jca->push_oop(next_arg(T_OBJECT)); }
 139   inline void do_object(int begin, int end) { if (!is_return_type()) _jca->push_oop(next_arg(T_OBJECT)); }
 140   inline void do_array(int begin, int end)  { if (!is_return_type()) _jca->push_oop(next_arg(T_OBJECT)); }
 141   inline void do_void()                     { }
 142 };
 143 
 144 #endif // SHARE_VM_JVMCI_JVMCI_COMPILER_TO_VM_HPP