Mercurial > hg > truffle
comparison src/share/vm/interpreter/abstractInterpreter.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | 98cb887364d3 |
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1 /* | |
2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // This file contains the platform-independant parts | |
26 // of the abstract interpreter and the abstract interpreter generator. | |
27 | |
28 // Organization of the interpreter(s). There exists two different interpreters in hotpot | |
29 // an assembly language version (aka template interpreter) and a high level language version | |
30 // (aka c++ interpreter). Th division of labor is as follows: | |
31 | |
32 // Template Interpreter C++ Interpreter Functionality | |
33 // | |
34 // templateTable* bytecodeInterpreter* actual interpretation of bytecodes | |
35 // | |
36 // templateInterpreter* cppInterpreter* generation of assembly code that creates | |
37 // and manages interpreter runtime frames. | |
38 // Also code for populating interpreter | |
39 // frames created during deoptimization. | |
40 // | |
41 // For both template and c++ interpreter. There are common files for aspects of the interpreter | |
42 // that are generic to both interpreters. This is the layout: | |
43 // | |
44 // abstractInterpreter.hpp: generic description of the interpreter. | |
45 // interpreter*: generic frame creation and handling. | |
46 // | |
47 | |
48 //------------------------------------------------------------------------------------------------------------------------ | |
49 // The C++ interface to the bytecode interpreter(s). | |
50 | |
51 class AbstractInterpreter: AllStatic { | |
52 friend class VMStructs; | |
53 friend class Interpreter; | |
54 friend class CppInterpreterGenerator; | |
55 public: | |
56 enum MethodKind { | |
57 zerolocals, // method needs locals initialization | |
58 zerolocals_synchronized, // method needs locals initialization & is synchronized | |
59 native, // native method | |
60 native_synchronized, // native method & is synchronized | |
61 empty, // empty method (code: _return) | |
62 accessor, // accessor method (code: _aload_0, _getfield, _(a|i)return) | |
63 abstract, // abstract method (throws an AbstractMethodException) | |
64 java_lang_math_sin, // implementation of java.lang.Math.sin (x) | |
65 java_lang_math_cos, // implementation of java.lang.Math.cos (x) | |
66 java_lang_math_tan, // implementation of java.lang.Math.tan (x) | |
67 java_lang_math_abs, // implementation of java.lang.Math.abs (x) | |
68 java_lang_math_sqrt, // implementation of java.lang.Math.sqrt (x) | |
69 java_lang_math_log, // implementation of java.lang.Math.log (x) | |
70 java_lang_math_log10, // implementation of java.lang.Math.log10 (x) | |
71 number_of_method_entries, | |
72 invalid = -1 | |
73 }; | |
74 | |
75 enum SomeConstants { | |
76 number_of_result_handlers = 10 // number of result handlers for native calls | |
77 }; | |
78 | |
79 protected: | |
80 static StubQueue* _code; // the interpreter code (codelets) | |
81 | |
82 static bool _notice_safepoints; // true if safepoints are activated | |
83 | |
84 static address _native_entry_begin; // Region for native entry code | |
85 static address _native_entry_end; | |
86 | |
87 // method entry points | |
88 static address _entry_table[number_of_method_entries]; // entry points for a given method | |
89 static address _native_abi_to_tosca[number_of_result_handlers]; // for native method result handlers | |
90 static address _slow_signature_handler; // the native method generic (slow) signature handler | |
91 | |
92 static address _rethrow_exception_entry; // rethrows an activation in previous frame | |
93 | |
94 | |
95 | |
96 friend class AbstractInterpreterGenerator; | |
97 friend class InterpreterGenerator; | |
98 friend class InterpreterMacroAssembler; | |
99 | |
100 public: | |
101 // Initialization/debugging | |
102 static void initialize(); | |
103 static StubQueue* code() { return _code; } | |
104 | |
105 | |
106 // Method activation | |
107 static MethodKind method_kind(methodHandle m); | |
108 static address entry_for_kind(MethodKind k) { assert(0 <= k && k < number_of_method_entries, "illegal kind"); return _entry_table[k]; } | |
109 static address entry_for_method(methodHandle m) { return _entry_table[method_kind(m)]; } | |
110 | |
111 static void print_method_kind(MethodKind kind) PRODUCT_RETURN; | |
112 | |
113 // Runtime support | |
114 | |
115 // length = invoke bytecode length (to advance to next bytecode) | |
116 static address deopt_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; } | |
117 static address return_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; } | |
118 | |
119 static address rethrow_exception_entry() { return _rethrow_exception_entry; } | |
120 | |
121 // Activation size in words for a method that is just being called. | |
122 // Parameters haven't been pushed so count them too. | |
123 static int size_top_interpreter_activation(methodOop method); | |
124 | |
125 // Deoptimization support | |
126 static address continuation_for(methodOop method, | |
127 address bcp, | |
128 int callee_parameters, | |
129 bool is_top_frame, | |
130 bool& use_next_mdp); | |
131 | |
132 // share implementation of size_activation and layout_activation: | |
133 static int size_activation(methodOop method, | |
134 int temps, | |
135 int popframe_args, | |
136 int monitors, | |
137 int callee_params, | |
138 int callee_locals, | |
139 bool is_top_frame); | |
140 | |
141 static int layout_activation(methodOop method, | |
142 int temps, | |
143 int popframe_args, | |
144 int monitors, | |
145 int callee_params, | |
146 int callee_locals, | |
147 frame* caller, | |
148 frame* interpreter_frame, | |
149 bool is_top_frame); | |
150 | |
151 // Runtime support | |
152 static bool is_not_reached( methodHandle method, int bci); | |
153 // Safepoint support | |
154 static void notice_safepoints() { ShouldNotReachHere(); } // stops the thread when reaching a safepoint | |
155 static void ignore_safepoints() { ShouldNotReachHere(); } // ignores safepoints | |
156 | |
157 // Support for native calls | |
158 static address slow_signature_handler() { return _slow_signature_handler; } | |
159 static address result_handler(BasicType type) { return _native_abi_to_tosca[BasicType_as_index(type)]; } | |
160 static int BasicType_as_index(BasicType type); // computes index into result_handler_by_index table | |
161 static bool in_native_entry(address pc) { return _native_entry_begin <= pc && pc < _native_entry_end; } | |
162 // Debugging/printing | |
163 static void print(); // prints the interpreter code | |
164 | |
165 // Support for Tagged Stacks | |
166 // | |
167 // Tags are stored on the Java Expression stack above the value: | |
168 // | |
169 // tag | |
170 // value | |
171 // | |
172 // For double values: | |
173 // | |
174 // tag2 | |
175 // high word | |
176 // tag1 | |
177 // low word | |
178 | |
179 public: | |
180 static int stackElementWords() { return TaggedStackInterpreter ? 2 : 1; } | |
181 static int stackElementSize() { return stackElementWords()*wordSize; } | |
182 static int logStackElementSize() { return | |
183 TaggedStackInterpreter? LogBytesPerWord+1 : LogBytesPerWord; } | |
184 | |
185 // Tag is at pointer, value is one below for a stack growing down | |
186 // (or above for stack growing up) | |
187 static int value_offset_in_bytes() { | |
188 return TaggedStackInterpreter ? | |
189 frame::interpreter_frame_expression_stack_direction() * wordSize : 0; | |
190 } | |
191 static int tag_offset_in_bytes() { | |
192 assert(TaggedStackInterpreter, "should not call this"); | |
193 return 0; | |
194 } | |
195 | |
196 // Tagged Locals | |
197 // Locals are stored relative to Llocals: | |
198 // | |
199 // tag <- Llocals[n] | |
200 // value | |
201 // | |
202 // Category 2 types are indexed as: | |
203 // | |
204 // tag <- Llocals[-n] | |
205 // high word | |
206 // tag <- Llocals[-n+1] | |
207 // low word | |
208 // | |
209 | |
210 // Local values relative to locals[n] | |
211 static int local_offset_in_bytes(int n) { | |
212 return ((frame::interpreter_frame_expression_stack_direction() * n) * | |
213 stackElementSize()) + value_offset_in_bytes(); | |
214 } | |
215 static int local_tag_offset_in_bytes(int n) { | |
216 assert(TaggedStackInterpreter, "should not call this"); | |
217 return ((frame::interpreter_frame_expression_stack_direction() * n) * | |
218 stackElementSize()) + tag_offset_in_bytes(); | |
219 } | |
220 | |
221 }; | |
222 | |
223 //------------------------------------------------------------------------------------------------------------------------ | |
224 // The interpreter generator. | |
225 | |
226 class Template; | |
227 class AbstractInterpreterGenerator: public StackObj { | |
228 protected: | |
229 InterpreterMacroAssembler* _masm; | |
230 | |
231 // shared code sequences | |
232 // Converter for native abi result to tosca result | |
233 address generate_result_handler_for(BasicType type); | |
234 address generate_slow_signature_handler(); | |
235 | |
236 // entry point generator | |
237 address generate_method_entry(AbstractInterpreter::MethodKind kind); | |
238 | |
239 void bang_stack_shadow_pages(bool native_call); | |
240 | |
241 void generate_all(); | |
242 | |
243 public: | |
244 AbstractInterpreterGenerator(StubQueue* _code); | |
245 }; |