1 /*
2 * Copyright (c) 1997, 2012, 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
25 #ifndef SHARE_VM_INTERPRETER_TEMPLATEINTERPRETER_HPP
26 #define SHARE_VM_INTERPRETER_TEMPLATEINTERPRETER_HPP
27
28 #include "interpreter/abstractInterpreter.hpp"
29 #include "interpreter/templateTable.hpp"
30
31 // This file contains the platform-independent parts
32 // of the template interpreter and the template interpreter generator.
33
34 #ifndef CC_INTERP
35
36 //------------------------------------------------------------------------------------------------------------------------
37 // A little wrapper class to group tosca-specific entry points into a unit.
38 // (tosca = Top-Of-Stack CAche)
39
40 class EntryPoint VALUE_OBJ_CLASS_SPEC {
41 private:
42 address _entry[number_of_states];
43
44 public:
45 // Construction
46 EntryPoint();
47 EntryPoint(address bentry, address centry, address sentry, address aentry, address ientry, address lentry, address fentry, address dentry, address ventry);
48
49 // Attributes
50 address entry(TosState state) const; // return target address for a given tosca state
51 void set_entry(TosState state, address entry); // set target address for a given tosca state
52 void print();
53
54 // Comparison
55 bool operator == (const EntryPoint& y); // for debugging only
56 };
57
58
59 //------------------------------------------------------------------------------------------------------------------------
60 // A little wrapper class to group tosca-specific dispatch tables into a unit.
61
62 class DispatchTable VALUE_OBJ_CLASS_SPEC {
63 public:
64 enum { length = 1 << BitsPerByte }; // an entry point for each byte value (also for undefined bytecodes)
65
66 private:
67 address _table[number_of_states][length]; // dispatch tables, indexed by tosca and bytecode
68
69 public:
70 // Attributes
71 EntryPoint entry(int i) const; // return entry point for a given bytecode i
72 void set_entry(int i, EntryPoint& entry); // set entry point for a given bytecode i
73 address* table_for(TosState state) { return _table[state]; }
74 address* table_for() { return table_for((TosState)0); }
75 int distance_from(address *table) { return table - table_for(); }
76 int distance_from(TosState state) { return distance_from(table_for(state)); }
77
78 // Comparison
79 bool operator == (DispatchTable& y); // for debugging only
80 };
81
82 class TemplateInterpreter: public AbstractInterpreter {
83 friend class VMStructs;
84 friend class InterpreterMacroAssembler;
85 friend class TemplateInterpreterGenerator;
86 friend class InterpreterGenerator;
87 friend class TemplateTable;
88 // friend class Interpreter;
89 public:
90
91 enum MoreConstants {
92 number_of_return_entries = number_of_states, // number of return entry points
93 number_of_deopt_entries = number_of_states, // number of deoptimization entry points
94 number_of_return_addrs = number_of_states // number of return addresses
95 };
96
97 protected:
98
99 static address _throw_ArrayIndexOutOfBoundsException_entry;
100 static address _throw_ArrayStoreException_entry;
101 static address _throw_ArithmeticException_entry;
102 static address _throw_ClassCastException_entry;
103 static address _throw_WrongMethodType_entry;
104 static address _throw_NullPointerException_entry;
105 static address _throw_exception_entry;
106
107 static address _throw_StackOverflowError_entry;
108
109 static address _remove_activation_entry; // continuation address if an exception is not handled by current frame
110 #ifdef HOTSWAP
111 static address _remove_activation_preserving_args_entry; // continuation address when current frame is being popped
112 #endif // HOTSWAP
113
114 #ifndef PRODUCT
115 static EntryPoint _trace_code;
116 #endif // !PRODUCT
117 static EntryPoint _return_entry[number_of_return_entries]; // entry points to return to from a call
118 static EntryPoint _earlyret_entry; // entry point to return early from a call
119 static EntryPoint _deopt_entry[number_of_deopt_entries]; // entry points to return to from a deoptimization
120 static EntryPoint _continuation_entry;
121 static EntryPoint _safept_entry;
122
123 static address _invoke_return_entry[number_of_return_addrs]; // for invokevirtual return entries
124 static address _invokeinterface_return_entry[number_of_return_addrs]; // for invokeinterface return entries
125 static address _invokedynamic_return_entry[number_of_return_addrs]; // for invokedynamic return entries
126
127 static DispatchTable _active_table; // the active dispatch table (used by the interpreter for dispatch)
128 static DispatchTable _normal_table; // the normal dispatch table (used to set the active table in normal mode)
129 static DispatchTable _safept_table; // the safepoint dispatch table (used to set the active table for safepoints)
130 static address _wentry_point[DispatchTable::length]; // wide instructions only (vtos tosca always)
131
132
133 public:
134 // Initialization/debugging
135 static void initialize();
136 // this only returns whether a pc is within generated code for the interpreter.
137 static bool contains(address pc) { return _code != NULL && _code->contains(pc); }
138
139 public:
140
141 static address remove_activation_early_entry(TosState state) { return _earlyret_entry.entry(state); }
142 #ifdef HOTSWAP
143 static address remove_activation_preserving_args_entry() { return _remove_activation_preserving_args_entry; }
144 #endif // HOTSWAP
145
146 static address remove_activation_entry() { return _remove_activation_entry; }
147 static address throw_exception_entry() { return _throw_exception_entry; }
148 static address throw_ArithmeticException_entry() { return _throw_ArithmeticException_entry; }
149 static address throw_WrongMethodType_entry() { return _throw_WrongMethodType_entry; }
150 static address throw_NullPointerException_entry() { return _throw_NullPointerException_entry; }
151 static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_entry; }
152
153 // Code generation
154 #ifndef PRODUCT
155 static address trace_code (TosState state) { return _trace_code.entry(state); }
156 #endif // !PRODUCT
157 static address continuation (TosState state) { return _continuation_entry.entry(state); }
158 static address* dispatch_table(TosState state) { return _active_table.table_for(state); }
159 static address* dispatch_table() { return _active_table.table_for(); }
160 static int distance_from_dispatch_table(TosState state){ return _active_table.distance_from(state); }
161 static address* normal_table(TosState state) { return _normal_table.table_for(state); }
162 static address* normal_table() { return _normal_table.table_for(); }
163
164 // Support for invokes
165 static address* invoke_return_entry_table() { return _invoke_return_entry; }
166 static address* invokeinterface_return_entry_table() { return _invokeinterface_return_entry; }
167 static address* invokedynamic_return_entry_table() { return _invokedynamic_return_entry; }
168 static int TosState_as_index(TosState state);
169
170 static address* invoke_return_entry_table_for(Bytecodes::Code code);
171
172 static address deopt_entry(TosState state, int length);
173 static address return_entry(TosState state, int length, Bytecodes::Code code);
174
175 // Safepoint support
176 static void notice_safepoints(); // stops the thread when reaching a safepoint
177 static void ignore_safepoints(); // ignores safepoints
178
179 // Deoptimization support
180 // Compute the entry address for continuation after
181 static address deopt_continue_after_entry(Method* method,
182 address bcp,
183 int callee_parameters,
184 bool is_top_frame);
185 // Deoptimization should reexecute this bytecode
186 static bool bytecode_should_reexecute(Bytecodes::Code code);
187 // Compute the address for reexecution
188 static address deopt_reexecute_entry(Method* method, address bcp);
189
190 #ifdef TARGET_ARCH_x86
191 # include "templateInterpreter_x86.hpp"
192 #endif
193 #ifdef TARGET_ARCH_sparc
194 # include "templateInterpreter_sparc.hpp"
195 #endif
196 #ifdef TARGET_ARCH_zero
197 # include "templateInterpreter_zero.hpp"
198 #endif
199 #ifdef TARGET_ARCH_arm
200 # include "templateInterpreter_arm.hpp"
201 #endif
202 #ifdef TARGET_ARCH_ppc
203 # include "templateInterpreter_ppc.hpp"
204 #endif
205
206
207 };
208
209 #endif // !CC_INTERP
210
211 #endif // SHARE_VM_INTERPRETER_TEMPLATEINTERPRETER_HPP