|
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 }; |