1 /*
2 * Copyright (c) 1997, 2023, 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.
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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
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23 */
24
25 #ifndef SHARE_INTERPRETER_ABSTRACTINTERPRETER_HPP
26 #define SHARE_INTERPRETER_ABSTRACTINTERPRETER_HPP
27
28 #include "asm/macroAssembler.hpp"
29 #include "classfile/vmIntrinsics.hpp"
30 #include "code/stubs.hpp"
31 #include "interpreter/bytecodes.hpp"
32 #include "oops/method.hpp"
33 #include "runtime/frame.hpp"
34 #include "runtime/javaThread.hpp"
35 #include "runtime/vmThread.hpp"
36
37 // This file contains the platform-independent parts
38 // of the abstract interpreter and the abstract interpreter generator.
39
40 // Organization of the interpreter(s). There exists two different interpreters in hotpot
41 // an assembly language version (aka template interpreter) and a high level language version
42 // (aka c++ interpreter). Th division of labor is as follows:
43
44 // Template Interpreter Zero Interpreter Functionality
45 //
46 // templateTable* bytecodeInterpreter* actual interpretation of bytecodes
47 //
48 // templateInterpreter* zeroInterpreter* generation of assembly code that creates
49 // and manages interpreter runtime frames.
50 //
51
52 class InterpreterMacroAssembler;
53
54 class AbstractInterpreter: AllStatic {
55 friend class VMStructs;
56 friend class ZeroInterpreterGenerator;
57 friend class TemplateInterpreterGenerator;
58 public:
59 enum MethodKind {
60 zerolocals, // method needs locals initialization
61 zerolocals_synchronized, // method needs locals initialization & is synchronized
62 native, // native method
63 native_synchronized, // native method & is synchronized
64 empty, // empty method (code: _return)
65 getter, // getter method
66 setter, // setter method
67 abstract, // abstract method (throws an AbstractMethodException)
68 method_handle_invoke_FIRST, // java.lang.invoke.MethodHandles::invokeExact, etc.
69 method_handle_invoke_LAST = (method_handle_invoke_FIRST
70 + (static_cast<int>(vmIntrinsics::LAST_MH_SIG_POLY)
71 - static_cast<int>(vmIntrinsics::FIRST_MH_SIG_POLY))),
72 java_lang_math_sin, // implementation of java.lang.Math.sin (x)
73 java_lang_math_cos, // implementation of java.lang.Math.cos (x)
74 java_lang_math_tan, // implementation of java.lang.Math.tan (x)
75 java_lang_math_abs, // implementation of java.lang.Math.abs (x)
76 java_lang_math_sqrt, // implementation of java.lang.Math.sqrt (x)
77 java_lang_math_sqrt_strict, // implementation of java.lang.StrictMath.sqrt(x)
78 java_lang_math_log, // implementation of java.lang.Math.log (x)
79 java_lang_math_log10, // implementation of java.lang.Math.log10 (x)
80 java_lang_math_pow, // implementation of java.lang.Math.pow (x,y)
81 java_lang_math_exp, // implementation of java.lang.Math.exp (x)
82 java_lang_math_fmaF, // implementation of java.lang.Math.fma (x, y, z)
83 java_lang_math_fmaD, // implementation of java.lang.Math.fma (x, y, z)
84 java_lang_ref_reference_get, // implementation of java.lang.ref.Reference.get()
85 java_util_zip_CRC32_update, // implementation of java.util.zip.CRC32.update()
86 java_util_zip_CRC32_updateBytes, // implementation of java.util.zip.CRC32.updateBytes()
87 java_util_zip_CRC32_updateByteBuffer, // implementation of java.util.zip.CRC32.updateByteBuffer()
88 java_util_zip_CRC32C_updateBytes, // implementation of java.util.zip.CRC32C.updateBytes(crc, b[], off, end)
89 java_util_zip_CRC32C_updateDirectByteBuffer, // implementation of java.util.zip.CRC32C.updateDirectByteBuffer(crc, address, off, end)
90 java_lang_Float_intBitsToFloat, // implementation of java.lang.Float.intBitsToFloat()
91 java_lang_Float_floatToRawIntBits, // implementation of java.lang.Float.floatToRawIntBits()
92 java_lang_Float_float16ToFloat, // implementation of java.lang.Float.float16ToFloat()
93 java_lang_Float_floatToFloat16, // implementation of java.lang.Float.floatToFloat16()
94 java_lang_Double_longBitsToDouble, // implementation of java.lang.Double.longBitsToDouble()
95 java_lang_Double_doubleToRawLongBits, // implementation of java.lang.Double.doubleToRawLongBits()
96 java_lang_Thread_currentThread, // implementation of java.lang.Thread.currentThread()
97 number_of_method_entries,
98 invalid = -1
99 };
100
101 // Conversion from the part of the above enum to vmIntrinsics::_invokeExact, etc.
102 static vmIntrinsics::ID method_handle_intrinsic(MethodKind kind) {
103 if (kind >= method_handle_invoke_FIRST && kind <= method_handle_invoke_LAST)
104 return vmIntrinsics::ID_from(static_cast<int>(vmIntrinsics::FIRST_MH_SIG_POLY) + (kind - method_handle_invoke_FIRST));
105 else
106 return vmIntrinsics::_none;
107 }
108
109 // Conversion from the above enum to vmIntrinsics::ID
110 static vmIntrinsics::ID method_intrinsic(MethodKind kind);
111
112 enum SomeConstants {
113 number_of_result_handlers = 11 // number of result handlers for native calls
114 };
115
116 protected:
117 static StubQueue* _code; // the interpreter code (codelets)
118
119 static bool _notice_safepoints; // true if safepoints are activated
120
121 // method entry points
122 static address _entry_table[number_of_method_entries]; // entry points for a given method
123 static address _native_abi_to_tosca[number_of_result_handlers]; // for native method result handlers
124 static address _slow_signature_handler; // the native method generic (slow) signature handler
125
126 static address _rethrow_exception_entry; // rethrows an activation in previous frame
127
128 friend class AbstractInterpreterGenerator;
129 friend class InterpreterMacroAssembler;
130
131 public:
132 // Initialization/debugging
133 static void initialize();
134 static StubQueue* code() { return _code; }
135
136
137 // Method activation
138 static MethodKind method_kind(const methodHandle& m);
139 static address entry_for_kind(MethodKind k) { assert(0 <= k && k < number_of_method_entries, "illegal kind"); return _entry_table[k]; }
140 static address entry_for_method(const methodHandle& m) { return entry_for_kind(method_kind(m)); }
141
142 // used for bootstrapping method handles:
143 static void set_entry_for_kind(MethodKind k, address e);
144
145 static void print_method_kind(MethodKind kind) PRODUCT_RETURN;
146
147 // These should never be compiled since the interpreter will prefer
148 // the compiled version to the intrinsic version.
149 static bool can_be_compiled(const methodHandle& m) {
150 switch (m->intrinsic_id()) {
151 case vmIntrinsics::_dsin : // fall thru
152 case vmIntrinsics::_dcos : // fall thru
153 case vmIntrinsics::_dtan : // fall thru
154 case vmIntrinsics::_dabs : // fall thru
155 case vmIntrinsics::_dsqrt : // fall thru
156 case vmIntrinsics::_dsqrt_strict : // fall thru
157 case vmIntrinsics::_dlog : // fall thru
158 case vmIntrinsics::_dlog10: // fall thru
159 case vmIntrinsics::_dpow : // fall thru
160 case vmIntrinsics::_dexp : // fall thru
161 case vmIntrinsics::_fmaD : // fall thru
162 case vmIntrinsics::_fmaF : // fall thru
163 case vmIntrinsics::_floatToFloat16 : // fall thru
164 case vmIntrinsics::_float16ToFloat : // fall thru
165 case vmIntrinsics::_Continuation_doYield : // fall thru
166 return false;
167
168 default:
169 return true;
170 }
171 }
172
173 // Runtime support
174
175 // length = invoke bytecode length (to advance to next bytecode)
176 static address deopt_entry(TosState state, int length) { ShouldNotReachHere(); return nullptr; }
177 static address return_entry(TosState state, int length, Bytecodes::Code code) { ShouldNotReachHere(); return nullptr; }
178
179 static address rethrow_exception_entry() { return _rethrow_exception_entry; }
180
181 // Activation size in words for a method that is just being called.
182 // Parameters haven't been pushed so count them too.
183 static int size_top_interpreter_activation(Method* method);
184
185 // Deoptimization support
186 // Compute the entry address for continuation after
187 static address deopt_continue_after_entry(Method* method,
188 address bcp,
189 int callee_parameters,
190 bool is_top_frame);
191 // Compute the entry address for reexecution
192 static address deopt_reexecute_entry(Method* method, address bcp);
193 // Deoptimization should reexecute this bytecode
194 static bool bytecode_should_reexecute(Bytecodes::Code code);
195
196 // deoptimization support
197 static int size_activation(int max_stack,
198 int temps,
199 int extra_args,
200 int monitors,
201 int callee_params,
202 int callee_locals,
203 bool is_top_frame);
204
205 static void layout_activation(Method* method,
206 int temps,
207 int popframe_args,
208 int monitors,
209 int caller_actual_parameters,
210 int callee_params,
211 int callee_locals,
212 frame* caller,
213 frame* interpreter_frame,
214 bool is_top_frame,
215 bool is_bottom_frame);
216
217 // Runtime support
218 static bool is_not_reached(const methodHandle& method, int bci);
219 // Safepoint support
220 static void notice_safepoints() { ShouldNotReachHere(); } // stops the thread when reaching a safepoint
221 static void ignore_safepoints() { ShouldNotReachHere(); } // ignores safepoints
222
223 // Support for native calls
224 static address slow_signature_handler() { return _slow_signature_handler; }
225 static address result_handler(BasicType type) { return _native_abi_to_tosca[BasicType_as_index(type)]; }
226 static int BasicType_as_index(BasicType type); // computes index into result_handler_by_index table
227 // Debugging/printing
228 static void print(); // prints the interpreter code
229
230 public:
231 // Interpreter helpers
232 const static int stackElementWords = 1;
233 const static int stackElementSize = stackElementWords * wordSize;
234 const static int logStackElementSize = LogBytesPerWord;
235
236 static int expr_index_at(int i) {
237 return stackElementWords * i;
238 }
239
240 static int expr_offset_in_bytes(int i) {
241 #if !defined(ZERO) && (defined(PPC) || defined(S390))
242 return stackElementSize * i + wordSize; // both point to one word past TOS
243 #else
244 return stackElementSize * i;
245 #endif
246 }
247
248 static int local_index_at(int i) {
249 assert(i <= 0, "local direction already negated");
250 return stackElementWords * i;
251 }
252
253 #if !defined(ZERO) && (defined(IA32) || defined(AMD64))
254 static Address::ScaleFactor stackElementScale() {
255 return NOT_LP64(Address::times_4) LP64_ONLY(Address::times_8);
256 }
257 #endif
258
259 // Local values relative to locals[n]
260 static int local_offset_in_bytes(int n) {
261 return ((frame::interpreter_frame_expression_stack_direction() * n) * stackElementSize);
262 }
263
264 // access to stacked values according to type:
265 static oop* oop_addr_in_slot(intptr_t* slot_addr) {
266 return (oop*) slot_addr;
267 }
268 static jint* int_addr_in_slot(intptr_t* slot_addr) {
269 if ((int) sizeof(jint) < wordSize && !Endian::is_Java_byte_ordering_different())
270 // big-endian LP64
271 return (jint*)(slot_addr + 1) - 1;
272 else
273 return (jint*) slot_addr;
274 }
275 static jlong long_in_slot(intptr_t* slot_addr) {
276 if (sizeof(intptr_t) >= sizeof(jlong)) {
277 return *(jlong*) slot_addr;
278 } else {
279 return Bytes::get_native_u8((address)slot_addr);
280 }
281 }
282 static void set_long_in_slot(intptr_t* slot_addr, jlong value) {
283 if (sizeof(intptr_t) >= sizeof(jlong)) {
284 *(jlong*) slot_addr = value;
285 } else {
286 Bytes::put_native_u8((address)slot_addr, value);
287 }
288 }
289
290 static void initialize_method_handle_entries();
291 };
292
293 //------------------------------------------------------------------------------------------------------------------------
294 // The interpreter generator.
295
296 class Template;
297 class AbstractInterpreterGenerator: public StackObj {
298 protected:
299 InterpreterMacroAssembler* _masm;
300
301 public:
302 AbstractInterpreterGenerator();
303 };
304
305 #endif // SHARE_INTERPRETER_ABSTRACTINTERPRETER_HPP