1 /*
2 * Copyright (c) 1997, 2014, 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
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7 * published by the Free Software Foundation.
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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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24
25 #ifndef SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP
26 #define SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP
27
28 #include "asm/macroAssembler.hpp"
29 #include "code/stubs.hpp"
30 #include "interpreter/bytecodes.hpp"
31 #include "runtime/thread.inline.hpp"
32 #include "runtime/vmThread.hpp"
33 #include "utilities/top.hpp"
34
35 // This file contains the platform-independent parts
36 // of the abstract interpreter and the abstract interpreter generator.
37
38 // Organization of the interpreter(s). There exists two different interpreters in hotpot
39 // an assembly language version (aka template interpreter) and a high level language version
40 // (aka c++ interpreter). Th division of labor is as follows:
41
42 // Template Interpreter C++ Interpreter Functionality
43 //
44 // templateTable* bytecodeInterpreter* actual interpretation of bytecodes
45 //
46 // templateInterpreter* cppInterpreter* generation of assembly code that creates
47 // and manages interpreter runtime frames.
48 // Also code for populating interpreter
49 // frames created during deoptimization.
50 //
51 // For both template and c++ interpreter. There are common files for aspects of the interpreter
52 // that are generic to both interpreters. This is the layout:
53 //
54 // abstractInterpreter.hpp: generic description of the interpreter.
55 // interpreter*: generic frame creation and handling.
56 //
57
58 //------------------------------------------------------------------------------------------------------------------------
59 // The C++ interface to the bytecode interpreter(s).
60
61 class InterpreterMacroAssembler;
62
63 class AbstractInterpreter: AllStatic {
64 friend class VMStructs;
65 friend class Interpreter;
66 friend class CppInterpreterGenerator;
67 public:
68 enum MethodKind {
69 zerolocals, // method needs locals initialization
70 zerolocals_synchronized, // method needs locals initialization & is synchronized
71 native, // native method
72 native_synchronized, // native method & is synchronized
73 empty, // empty method (code: _return)
74 accessor, // accessor method (code: _aload_0, _getfield, _(a|i)return)
75 abstract, // abstract method (throws an AbstractMethodException)
76 method_handle_invoke_FIRST, // java.lang.invoke.MethodHandles::invokeExact, etc.
77 method_handle_invoke_LAST = (method_handle_invoke_FIRST
78 + (vmIntrinsics::LAST_MH_SIG_POLY
79 - vmIntrinsics::FIRST_MH_SIG_POLY)),
80 java_lang_math_sin, // implementation of java.lang.Math.sin (x)
81 java_lang_math_cos, // implementation of java.lang.Math.cos (x)
82 java_lang_math_tan, // implementation of java.lang.Math.tan (x)
83 java_lang_math_abs, // implementation of java.lang.Math.abs (x)
84 java_lang_math_sqrt, // implementation of java.lang.Math.sqrt (x)
85 java_lang_math_log, // implementation of java.lang.Math.log (x)
86 java_lang_math_log10, // implementation of java.lang.Math.log10 (x)
87 java_lang_math_pow, // implementation of java.lang.Math.pow (x,y)
88 java_lang_math_exp, // implementation of java.lang.Math.exp (x)
89 java_lang_ref_reference_get, // implementation of java.lang.ref.Reference.get()
90 java_util_zip_CRC32_update, // implementation of java.util.zip.CRC32.update()
91 java_util_zip_CRC32_updateBytes, // implementation of java.util.zip.CRC32.updateBytes()
92 java_util_zip_CRC32_updateByteBuffer, // implementation of java.util.zip.CRC32.updateByteBuffer()
93 number_of_method_entries,
94 invalid = -1
95 };
96
97 // Conversion from the part of the above enum to vmIntrinsics::_invokeExact, etc.
98 static vmIntrinsics::ID method_handle_intrinsic(MethodKind kind) {
99 if (kind >= method_handle_invoke_FIRST && kind <= method_handle_invoke_LAST)
100 return (vmIntrinsics::ID)( vmIntrinsics::FIRST_MH_SIG_POLY + (kind - method_handle_invoke_FIRST) );
101 else
102 return vmIntrinsics::_none;
103 }
104
105 enum SomeConstants {
106 number_of_result_handlers = 10 // number of result handlers for native calls
107 };
108
109 protected:
110 static StubQueue* _code; // the interpreter code (codelets)
111
112 static bool _notice_safepoints; // true if safepoints are activated
113
114 static address _native_entry_begin; // Region for native entry code
115 static address _native_entry_end;
116
117 // method entry points
118 static address _entry_table[number_of_method_entries]; // entry points for a given method
119 static address _native_abi_to_tosca[number_of_result_handlers]; // for native method result handlers
120 static address _slow_signature_handler; // the native method generic (slow) signature handler
121
122 static address _rethrow_exception_entry; // rethrows an activation in previous frame
123
124 friend class AbstractInterpreterGenerator;
125 friend class InterpreterGenerator;
126 friend class InterpreterMacroAssembler;
127
128 public:
129 // Initialization/debugging
130 static void initialize();
131 static StubQueue* code() { return _code; }
132
133
134 // Method activation
135 static MethodKind method_kind(methodHandle m);
136 static address entry_for_kind(MethodKind k) { assert(0 <= k && k < number_of_method_entries, "illegal kind"); return _entry_table[k]; }
137 static address entry_for_method(methodHandle m) { return entry_for_kind(method_kind(m)); }
138
139 // used for bootstrapping method handles:
140 static void set_entry_for_kind(MethodKind k, address e);
141
142 static void print_method_kind(MethodKind kind) PRODUCT_RETURN;
143
144 static bool can_be_compiled(methodHandle m);
145
146 // Runtime support
147
148 // length = invoke bytecode length (to advance to next bytecode)
149 static address deopt_entry(TosState state, int length) { ShouldNotReachHere(); return NULL; }
150 static address return_entry(TosState state, int length, Bytecodes::Code code) { ShouldNotReachHere(); return NULL; }
151
152 static address rethrow_exception_entry() { return _rethrow_exception_entry; }
153
154 // Activation size in words for a method that is just being called.
155 // Parameters haven't been pushed so count them too.
156 static int size_top_interpreter_activation(Method* method);
157
158 // Deoptimization support
159 // Compute the entry address for continuation after
160 static address deopt_continue_after_entry(Method* method,
161 address bcp,
162 int callee_parameters,
163 bool is_top_frame);
164 // Compute the entry address for reexecution
165 static address deopt_reexecute_entry(Method* method, address bcp);
166 // Deoptimization should reexecute this bytecode
167 static bool bytecode_should_reexecute(Bytecodes::Code code);
168
169 // deoptimization support
170 static int size_activation(int max_stack,
171 int temps,
172 int extra_args,
173 int monitors,
174 int callee_params,
175 int callee_locals,
176 bool is_top_frame);
177
178 static void layout_activation(Method* method,
179 int temps,
180 int popframe_args,
181 int monitors,
182 int caller_actual_parameters,
183 int callee_params,
184 int callee_locals,
185 frame* caller,
186 frame* interpreter_frame,
187 bool is_top_frame,
188 bool is_bottom_frame);
189
190 // Runtime support
191 static bool is_not_reached( methodHandle method, int bci);
192 // Safepoint support
193 static void notice_safepoints() { ShouldNotReachHere(); } // stops the thread when reaching a safepoint
194 static void ignore_safepoints() { ShouldNotReachHere(); } // ignores safepoints
195
196 // Support for native calls
197 static address slow_signature_handler() { return _slow_signature_handler; }
198 static address result_handler(BasicType type) { return _native_abi_to_tosca[BasicType_as_index(type)]; }
199 static int BasicType_as_index(BasicType type); // computes index into result_handler_by_index table
200 static bool in_native_entry(address pc) { return _native_entry_begin <= pc && pc < _native_entry_end; }
201 // Debugging/printing
202 static void print(); // prints the interpreter code
203
204 public:
205 // Interpreter helpers
206 const static int stackElementWords = 1;
207 const static int stackElementSize = stackElementWords * wordSize;
208 const static int logStackElementSize = LogBytesPerWord;
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) * stackElementSize);
213 }
214
215 // access to stacked values according to type:
216 static oop* oop_addr_in_slot(intptr_t* slot_addr) {
217 return (oop*) slot_addr;
218 }
219 static jint* int_addr_in_slot(intptr_t* slot_addr) {
220 if ((int) sizeof(jint) < wordSize && !Bytes::is_Java_byte_ordering_different())
221 // big-endian LP64
222 return (jint*)(slot_addr + 1) - 1;
223 else
224 return (jint*) slot_addr;
225 }
226 static jlong long_in_slot(intptr_t* slot_addr) {
227 if (sizeof(intptr_t) >= sizeof(jlong)) {
228 return *(jlong*) slot_addr;
229 } else {
230 return Bytes::get_native_u8((address)slot_addr);
231 }
232 }
233 static void set_long_in_slot(intptr_t* slot_addr, jlong value) {
234 if (sizeof(intptr_t) >= sizeof(jlong)) {
235 *(jlong*) slot_addr = value;
236 } else {
237 Bytes::put_native_u8((address)slot_addr, value);
238 }
239 }
240 static void get_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) {
241 switch (type) {
242 case T_BOOLEAN: value->z = *int_addr_in_slot(slot_addr); break;
243 case T_CHAR: value->c = *int_addr_in_slot(slot_addr); break;
244 case T_BYTE: value->b = *int_addr_in_slot(slot_addr); break;
245 case T_SHORT: value->s = *int_addr_in_slot(slot_addr); break;
246 case T_INT: value->i = *int_addr_in_slot(slot_addr); break;
247 case T_LONG: value->j = long_in_slot(slot_addr); break;
248 case T_FLOAT: value->f = *(jfloat*)int_addr_in_slot(slot_addr); break;
249 case T_DOUBLE: value->d = jdouble_cast(long_in_slot(slot_addr)); break;
250 case T_OBJECT: value->l = (jobject)*oop_addr_in_slot(slot_addr); break;
251 default: ShouldNotReachHere();
252 }
253 }
254 static void set_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) {
255 switch (type) {
256 case T_BOOLEAN: *int_addr_in_slot(slot_addr) = (value->z != 0); break;
257 case T_CHAR: *int_addr_in_slot(slot_addr) = value->c; break;
258 case T_BYTE: *int_addr_in_slot(slot_addr) = value->b; break;
259 case T_SHORT: *int_addr_in_slot(slot_addr) = value->s; break;
260 case T_INT: *int_addr_in_slot(slot_addr) = value->i; break;
261 case T_LONG: set_long_in_slot(slot_addr, value->j); break;
262 case T_FLOAT: *(jfloat*)int_addr_in_slot(slot_addr) = value->f; break;
263 case T_DOUBLE: set_long_in_slot(slot_addr, jlong_cast(value->d)); break;
264 case T_OBJECT: *oop_addr_in_slot(slot_addr) = (oop) value->l; break;
265 default: ShouldNotReachHere();
266 }
267 }
268 };
269
270 //------------------------------------------------------------------------------------------------------------------------
271 // The interpreter generator.
272
273 class Template;
274 class AbstractInterpreterGenerator: public StackObj {
275 protected:
276 InterpreterMacroAssembler* _masm;
277
278 // shared code sequences
279 // Converter for native abi result to tosca result
280 address generate_result_handler_for(BasicType type);
281 address generate_slow_signature_handler();
282
283 void bang_stack_shadow_pages(bool native_call);
284
285 void generate_all();
286 void initialize_method_handle_entries();
287
288 public:
289 AbstractInterpreterGenerator(StubQueue* _code);
290 };
291
292 #endif // SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP