1 /*
  2  * Copyright (c) 2011, 2020, 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_JVMCI_JVMCICOMPILERTOVM_HPP
 25 #define SHARE_JVMCI_JVMCICOMPILERTOVM_HPP
 26 
 27 #include "gc/shared/cardTable.hpp"
 28 #include "jvmci/jvmciExceptions.hpp"
 29 #include "runtime/javaCalls.hpp"
 30 #include "runtime/signature.hpp"
 31 
 32 class CollectedHeap;
 33 class JVMCIObjectArray;
 34 
 35 class CompilerToVM {
 36  public:
 37   class Data {
 38     friend class JVMCIVMStructs;
 39 
 40    private:
 41     static int Klass_vtable_start_offset;
 42     static int Klass_vtable_length_offset;
 43 
 44     static int Method_extra_stack_entries;
 45 
 46     static address SharedRuntime_ic_miss_stub;
 47     static address SharedRuntime_handle_wrong_method_stub;
 48     static address SharedRuntime_deopt_blob_unpack;
 49     static address SharedRuntime_deopt_blob_unpack_with_exception_in_tls;
 50     static address SharedRuntime_deopt_blob_uncommon_trap;
 51 
 52     static size_t ThreadLocalAllocBuffer_alignment_reserve;
 53 
 54     static CollectedHeap* Universe_collectedHeap;
 55     static int Universe_base_vtable_size;
 56     static address Universe_narrow_oop_base;
 57     static int Universe_narrow_oop_shift;
 58     static address Universe_narrow_klass_base;
 59     static int Universe_narrow_klass_shift;
 60     static uintptr_t Universe_verify_oop_mask;
 61     static uintptr_t Universe_verify_oop_bits;
 62     static void* Universe_non_oop_bits;
 63 
 64     static bool _supports_inline_contig_alloc;
 65     static HeapWord** _heap_end_addr;
 66     static HeapWord* volatile* _heap_top_addr;
 67     static int _max_oop_map_stack_offset;
 68     static int _fields_annotations_base_offset;
 69 
 70     static CardTable::CardValue* cardtable_start_address;
 71     static int cardtable_shift;
 72 
 73     static int vm_page_size;
 74 
 75     static int sizeof_vtableEntry;
 76     static int sizeof_ExceptionTableElement;
 77     static int sizeof_LocalVariableTableElement;
 78     static int sizeof_ConstantPool;
 79     static int sizeof_narrowKlass;
 80     static int sizeof_arrayOopDesc;
 81     static int sizeof_BasicLock;
 82 
 83     static address dsin;
 84     static address dcos;
 85     static address dtan;
 86     static address dexp;
 87     static address dlog;
 88     static address dlog10;
 89     static address dpow;
 90 
 91     static address symbol_init;
 92     static address symbol_clinit;
 93 
 94    public:
 95      static void initialize(JVMCI_TRAPS);
 96 
 97     static int max_oop_map_stack_offset() {
 98       assert(_max_oop_map_stack_offset > 0, "must be initialized");
 99       return Data::_max_oop_map_stack_offset;
100     }
101   };
102 
103   static bool cstring_equals(const char* const& s0, const char* const& s1) {
104     return strcmp(s0, s1) == 0;
105   }
106 
107   static unsigned cstring_hash(const char* const& s) {
108     int h = 0;
109     const char* p = s;
110     while (*p != '\0') {
111       h = 31 * h + *p;
112       p++;
113     }
114     return h;
115   }
116 
117   static JNINativeMethod methods[];
118   static JNINativeMethod jni_methods[];
119 
120   static JVMCIObjectArray initialize_intrinsics(JVMCI_TRAPS);
121  public:
122   static int methods_count();
123 
124 };
125 
126 
127 class JavaArgumentUnboxer : public SignatureIterator {
128  protected:
129   JavaCallArguments*  _jca;
130   arrayOop _args;
131   int _index;
132 
133   Handle next_arg(BasicType expectedType);
134 
135  public:
136   JavaArgumentUnboxer(Symbol* signature,
137                       JavaCallArguments* jca,
138                       arrayOop args,
139                       bool is_static)
140     : SignatureIterator(signature)
141   {
142     this->_return_type = T_ILLEGAL;
143     _jca = jca;
144     _index = 0;
145     _args = args;
146     if (!is_static) {
147       _jca->push_oop(next_arg(T_OBJECT));
148     }
149     do_parameters_on(this);
150     assert(_index == args->length(), "arg count mismatch with signature");
151   }
152 
153  private:
154   friend class SignatureIterator;  // so do_parameters_on can call do_type
155   void do_type(BasicType type) {
156     if (is_reference_type(type)) {
157       _jca->push_oop(next_arg(T_OBJECT));
158       return;
159     }
160     Handle arg = next_arg(type);
161     int box_offset = java_lang_boxing_object::value_offset(type);
162     switch (type) {
163     case T_BOOLEAN:     _jca->push_int(arg->bool_field(box_offset));    break;
164     case T_CHAR:        _jca->push_int(arg->char_field(box_offset));    break;
165     case T_SHORT:       _jca->push_int(arg->short_field(box_offset));   break;
166     case T_BYTE:        _jca->push_int(arg->byte_field(box_offset));    break;
167     case T_INT:         _jca->push_int(arg->int_field(box_offset));     break;
168     case T_LONG:        _jca->push_long(arg->long_field(box_offset));   break;
169     case T_FLOAT:       _jca->push_float(arg->float_field(box_offset));    break;
170     case T_DOUBLE:      _jca->push_double(arg->double_field(box_offset));  break;
171     default:            ShouldNotReachHere();
172     }
173   }
174 };
175 
176 class JNIHandleMark : public StackObj {
177   JavaThread* _thread;
178   public:
179     JNIHandleMark(JavaThread* thread) : _thread(thread) { push_jni_handle_block(thread); }
180     ~JNIHandleMark() { pop_jni_handle_block(_thread); }
181 
182   private:
183     static void push_jni_handle_block(JavaThread* thread);
184     static void pop_jni_handle_block(JavaThread* thread);
185 };
186 
187 #endif // SHARE_JVMCI_JVMCICOMPILERTOVM_HPP