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.
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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.
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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).
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15 * You should have received a copy of the GNU General Public License version
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24
25 #ifndef SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP
26 #define SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP
27
28 #include "code/stubs.hpp"
29 #include "interpreter/bytecodes.hpp"
30 #include "runtime/thread.inline.hpp"
31 #include "runtime/vmThread.hpp"
32 #include "utilities/top.hpp"
33 #ifdef TARGET_ARCH_MODEL_x86_32
34 # include "interp_masm_x86_32.hpp"
35 #endif
36 #ifdef TARGET_ARCH_MODEL_x86_64
37 # include "interp_masm_x86_64.hpp"
38 #endif
39 #ifdef TARGET_ARCH_MODEL_sparc
40 # include "interp_masm_sparc.hpp"
41 #endif
42 #ifdef TARGET_ARCH_MODEL_zero
43 # include "interp_masm_zero.hpp"
44 #endif
45 #ifdef TARGET_ARCH_MODEL_arm
46 # include "interp_masm_arm.hpp"
47 #endif
48 #ifdef TARGET_ARCH_MODEL_ppc
49 # include "interp_masm_ppc.hpp"
50 #endif
51
52 // This file contains the platform-independent parts
53 // of the abstract interpreter and the abstract interpreter generator.
54
55 // Organization of the interpreter(s). There exists two different interpreters in hotpot
56 // an assembly language version (aka template interpreter) and a high level language version
57 // (aka c++ interpreter). Th division of labor is as follows:
58
59 // Template Interpreter C++ Interpreter Functionality
60 //
61 // templateTable* bytecodeInterpreter* actual interpretation of bytecodes
62 //
63 // templateInterpreter* cppInterpreter* generation of assembly code that creates
64 // and manages interpreter runtime frames.
65 // Also code for populating interpreter
66 // frames created during deoptimization.
67 //
68 // For both template and c++ interpreter. There are common files for aspects of the interpreter
69 // that are generic to both interpreters. This is the layout:
70 //
71 // abstractInterpreter.hpp: generic description of the interpreter.
72 // interpreter*: generic frame creation and handling.
73 //
74
75 //------------------------------------------------------------------------------------------------------------------------
76 // The C++ interface to the bytecode interpreter(s).
77
78 class AbstractInterpreter: AllStatic {
79 friend class VMStructs;
80 friend class Interpreter;
81 friend class CppInterpreterGenerator;
82 public:
83 enum MethodKind {
84 zerolocals, // method needs locals initialization
85 zerolocals_synchronized, // method needs locals initialization & is synchronized
86 native, // native method
87 native_synchronized, // native method & is synchronized
88 empty, // empty method (code: _return)
89 accessor, // accessor method (code: _aload_0, _getfield, _(a|i)return)
90 abstract, // abstract method (throws an AbstractMethodException)
91 method_handle_invoke_FIRST, // java.lang.invoke.MethodHandles::invokeExact, etc.
92 method_handle_invoke_LAST = (method_handle_invoke_FIRST
93 + (vmIntrinsics::LAST_MH_SIG_POLY
94 - vmIntrinsics::FIRST_MH_SIG_POLY)),
95 java_lang_math_sin, // implementation of java.lang.Math.sin (x)
96 java_lang_math_cos, // implementation of java.lang.Math.cos (x)
97 java_lang_math_tan, // implementation of java.lang.Math.tan (x)
98 java_lang_math_abs, // implementation of java.lang.Math.abs (x)
99 java_lang_math_sqrt, // implementation of java.lang.Math.sqrt (x)
100 java_lang_math_log, // implementation of java.lang.Math.log (x)
101 java_lang_math_log10, // implementation of java.lang.Math.log10 (x)
102 java_lang_math_pow, // implementation of java.lang.Math.pow (x,y)
103 java_lang_math_exp, // implementation of java.lang.Math.exp (x)
104 java_lang_ref_reference_get, // implementation of java.lang.ref.Reference.get()
105 number_of_method_entries,
106 invalid = -1
107 };
108
109 // Conversion from the part of the above enum to vmIntrinsics::_invokeExact, etc.
110 static vmIntrinsics::ID method_handle_intrinsic(MethodKind kind) {
111 if (kind >= method_handle_invoke_FIRST && kind <= method_handle_invoke_LAST)
112 return (vmIntrinsics::ID)( vmIntrinsics::FIRST_MH_SIG_POLY + (kind - method_handle_invoke_FIRST) );
113 else
114 return vmIntrinsics::_none;
115 }
116
117 enum SomeConstants {
118 number_of_result_handlers = 10 // number of result handlers for native calls
119 };
120
121 protected:
122 static StubQueue* _code; // the interpreter code (codelets)
123
124 static bool _notice_safepoints; // true if safepoints are activated
125
126 static address _native_entry_begin; // Region for native entry code
127 static address _native_entry_end;
128
129 // method entry points
130 static address _entry_table[number_of_method_entries]; // entry points for a given method
131 static address _native_abi_to_tosca[number_of_result_handlers]; // for native method result handlers
132 static address _slow_signature_handler; // the native method generic (slow) signature handler
133
134 static address _rethrow_exception_entry; // rethrows an activation in previous frame
135
136 friend class AbstractInterpreterGenerator;
137 friend class InterpreterGenerator;
138 friend class InterpreterMacroAssembler;
139
140 public:
141 // Initialization/debugging
142 static void initialize();
143 static StubQueue* code() { return _code; }
144
145
146 // Method activation
147 static MethodKind method_kind(methodHandle m);
148 static address entry_for_kind(MethodKind k) { assert(0 <= k && k < number_of_method_entries, "illegal kind"); return _entry_table[k]; }
149 static address entry_for_method(methodHandle m) { return entry_for_kind(method_kind(m)); }
150
151 // used for bootstrapping method handles:
152 static void set_entry_for_kind(MethodKind k, address e);
153
154 static void print_method_kind(MethodKind kind) PRODUCT_RETURN;
155
156 static bool can_be_compiled(methodHandle m);
157
158 // Runtime support
159
160 // length = invoke bytecode length (to advance to next bytecode)
161 static address deopt_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; }
162 static address return_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; }
163
164 static address rethrow_exception_entry() { return _rethrow_exception_entry; }
165
166 // Activation size in words for a method that is just being called.
167 // Parameters haven't been pushed so count them too.
168 static int size_top_interpreter_activation(Method* method);
169
170 // Deoptimization support
171 // Compute the entry address for continuation after
172 static address deopt_continue_after_entry(Method* method,
173 address bcp,
174 int callee_parameters,
175 bool is_top_frame);
176 // Compute the entry address for reexecution
177 static address deopt_reexecute_entry(Method* method, address bcp);
178 // Deoptimization should reexecute this bytecode
179 static bool bytecode_should_reexecute(Bytecodes::Code code);
180
181 // share implementation of size_activation and layout_activation:
182 static int size_activation(Method* method,
183 int temps,
184 int popframe_args,
185 int monitors,
186 int caller_actual_parameters,
187 int callee_params,
188 int callee_locals,
189 bool is_top_frame) {
190 return layout_activation(method,
191 temps,
192 popframe_args,
193 monitors,
194 caller_actual_parameters,
195 callee_params,
196 callee_locals,
197 (frame*)NULL,
198 (frame*)NULL,
199 is_top_frame);
200 }
201
202 static int layout_activation(Method* method,
203 int temps,
204 int popframe_args,
205 int monitors,
206 int caller_actual_parameters,
207 int callee_params,
208 int callee_locals,
209 frame* caller,
210 frame* interpreter_frame,
211 bool is_top_frame);
212
213 // Runtime support
214 static bool is_not_reached( methodHandle method, int bci);
215 // Safepoint support
216 static void notice_safepoints() { ShouldNotReachHere(); } // stops the thread when reaching a safepoint
217 static void ignore_safepoints() { ShouldNotReachHere(); } // ignores safepoints
218
219 // Support for native calls
220 static address slow_signature_handler() { return _slow_signature_handler; }
221 static address result_handler(BasicType type) { return _native_abi_to_tosca[BasicType_as_index(type)]; }
222 static int BasicType_as_index(BasicType type); // computes index into result_handler_by_index table
223 static bool in_native_entry(address pc) { return _native_entry_begin <= pc && pc < _native_entry_end; }
224 // Debugging/printing
225 static void print(); // prints the interpreter code
226
227 public:
228 // Interpreter helpers
229 const static int stackElementWords = 1;
230 const static int stackElementSize = stackElementWords * wordSize;
231 const static int logStackElementSize = LogBytesPerWord;
232
233 // Local values relative to locals[n]
234 static int local_offset_in_bytes(int n) {
235 return ((frame::interpreter_frame_expression_stack_direction() * n) * stackElementSize);
236 }
237
238 // access to stacked values according to type:
239 static oop* oop_addr_in_slot(intptr_t* slot_addr) {
240 return (oop*) slot_addr;
241 }
242 static jint* int_addr_in_slot(intptr_t* slot_addr) {
243 if ((int) sizeof(jint) < wordSize && !Bytes::is_Java_byte_ordering_different())
244 // big-endian LP64
245 return (jint*)(slot_addr + 1) - 1;
246 else
247 return (jint*) slot_addr;
248 }
249 static jlong long_in_slot(intptr_t* slot_addr) {
250 if (sizeof(intptr_t) >= sizeof(jlong)) {
251 return *(jlong*) slot_addr;
252 } else {
253 return Bytes::get_native_u8((address)slot_addr);
254 }
255 }
256 static void set_long_in_slot(intptr_t* slot_addr, jlong value) {
257 if (sizeof(intptr_t) >= sizeof(jlong)) {
258 *(jlong*) slot_addr = value;
259 } else {
260 Bytes::put_native_u8((address)slot_addr, value);
261 }
262 }
263 static void get_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) {
264 switch (type) {
265 case T_BOOLEAN: value->z = *int_addr_in_slot(slot_addr); break;
266 case T_CHAR: value->c = *int_addr_in_slot(slot_addr); break;
267 case T_BYTE: value->b = *int_addr_in_slot(slot_addr); break;
268 case T_SHORT: value->s = *int_addr_in_slot(slot_addr); break;
269 case T_INT: value->i = *int_addr_in_slot(slot_addr); break;
270 case T_LONG: value->j = long_in_slot(slot_addr); break;
271 case T_FLOAT: value->f = *(jfloat*)int_addr_in_slot(slot_addr); break;
272 case T_DOUBLE: value->d = jdouble_cast(long_in_slot(slot_addr)); break;
273 case T_OBJECT: value->l = (jobject)*oop_addr_in_slot(slot_addr); break;
274 default: ShouldNotReachHere();
275 }
276 }
277 static void set_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) {
278 switch (type) {
279 case T_BOOLEAN: *int_addr_in_slot(slot_addr) = (value->z != 0); break;
280 case T_CHAR: *int_addr_in_slot(slot_addr) = value->c; break;
281 case T_BYTE: *int_addr_in_slot(slot_addr) = value->b; break;
282 case T_SHORT: *int_addr_in_slot(slot_addr) = value->s; break;
283 case T_INT: *int_addr_in_slot(slot_addr) = value->i; break;
284 case T_LONG: set_long_in_slot(slot_addr, value->j); break;
285 case T_FLOAT: *(jfloat*)int_addr_in_slot(slot_addr) = value->f; break;
286 case T_DOUBLE: set_long_in_slot(slot_addr, jlong_cast(value->d)); break;
287 case T_OBJECT: *oop_addr_in_slot(slot_addr) = (oop) value->l; break;
288 default: ShouldNotReachHere();
289 }
290 }
291 };
292
293 //------------------------------------------------------------------------------------------------------------------------
294 // The interpreter generator.
295
296 class Template;
297 class AbstractInterpreterGenerator: public StackObj {
298 protected:
299 InterpreterMacroAssembler* _masm;
300
301 // shared code sequences
302 // Converter for native abi result to tosca result
303 address generate_result_handler_for(BasicType type);
304 address generate_slow_signature_handler();
305
306 // entry point generator
307 address generate_method_entry(AbstractInterpreter::MethodKind kind);
308
309 void bang_stack_shadow_pages(bool native_call);
310
311 void generate_all();
312 void initialize_method_handle_entries();
313
314 public:
315 AbstractInterpreterGenerator(StubQueue* _code);
316 };
317
318 #endif // SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP