1 /*
2 * Copyright (c) 2002, 2016, 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.
18 *
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
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_INTERPRETER_BYTECODEINTERPRETER_HPP
26 #define SHARE_VM_INTERPRETER_BYTECODEINTERPRETER_HPP
27
28 #include "memory/allocation.hpp"
29 #include "oops/methodData.hpp"
30 #include "oops/method.hpp"
31 #include "runtime/basicLock.hpp"
32 #include "runtime/frame.hpp"
33 #include "runtime/globals.hpp"
34 #include "utilities/globalDefinitions.hpp"
35 #include "utilities/macros.hpp"
36
37 #ifdef CC_INTERP
38
39 // JavaStack Implementation
40 #define MORE_STACK(count) \
41 (topOfStack -= ((count) * Interpreter::stackElementWords))
42
43 // CVM definitions find hotspot equivalents...
44
45 class InterpreterMacroAssembler;
46
47 union VMJavaVal64 {
48 jlong l;
49 jdouble d;
50 uint32_t v[2];
51 };
52
53
54 typedef class BytecodeInterpreter* interpreterState;
55
56 struct call_message {
57 class Method* _callee; // method to call during call_method request
58 address _callee_entry_point; // address to jump to for call_method request
59 int _bcp_advance; // size of the invoke bytecode operation
60 };
61
62 struct osr_message {
63 address _osr_buf; // the osr buffer
64 address _osr_entry; // the entry to the osr method
65 };
66
67 struct osr_result {
68 nmethod* nm; // osr nmethod
69 address return_addr; // osr blob return address
70 };
71
72 // Result returned to frame manager
73 union frame_manager_message {
74 call_message _to_call; // describes callee
75 osr_message _osr; // describes the osr
76 osr_result _osr_result; // result of OSR request
77 };
78
79 class BytecodeInterpreter : StackObj {
80 friend class SharedRuntime;
81 friend class AbstractInterpreterGenerator;
82 friend class CppInterpreterGenerator;
83 friend class InterpreterMacroAssembler;
84 friend class frame;
85 friend class VMStructs;
86
87 public:
88 enum messages {
89 no_request = 0, // unused
90 initialize, // Perform one time interpreter initializations (assumes all switches set)
91 // status message to C++ interpreter
92 method_entry, // initial method entry to interpreter
93 method_resume, // frame manager response to return_from_method request (assuming a frame to resume)
94 deopt_resume, // returning from a native call into a deopted frame
95 deopt_resume2, // deopt resume as a result of a PopFrame
96 got_monitors, // frame manager response to more_monitors request
97 rethrow_exception, // unwinding and throwing exception
98 // requests to frame manager from C++ interpreter
99 call_method, // request for new frame from interpreter, manager responds with method_entry
100 return_from_method, // request from interpreter to unwind, manager responds with method_continue
101 more_monitors, // need a new monitor
102 throwing_exception, // unwind stack and rethrow
103 popping_frame, // unwind call and retry call
104 do_osr, // request this invocation be OSR's
105 early_return // early return as commanded by jvmti
106 };
107
108 private:
109 JavaThread* _thread; // the vm's java thread pointer
110 address _bcp; // instruction pointer
111 intptr_t* _locals; // local variable pointer
112 ConstantPoolCache* _constants; // constant pool cache
113 Method* _method; // method being executed
114 oop _mirror; // mirror to klass containing method
115 DataLayout* _mdx; // compiler profiling data for current bytecode
116 intptr_t* _stack; // expression stack
117 messages _msg; // frame manager <-> interpreter message
118 frame_manager_message _result; // result to frame manager
119 interpreterState _prev_link; // previous interpreter state
120 oop _oop_temp; // mirror for interpreted native, null otherwise
121 intptr_t* _stack_base; // base of expression stack
122 intptr_t* _stack_limit; // limit of expression stack
123 BasicObjectLock* _monitor_base; // base of monitors on the native stack
124
125
126 public:
127 // Constructor is only used by the initialization step. All other instances are created
128 // by the frame manager.
129 BytecodeInterpreter(messages msg);
130
131 //
132 // Deoptimization support
133 //
134 static void layout_interpreterState(interpreterState to_fill,
135 frame* caller,
136 frame* interpreter_frame,
137 Method* method,
138 intptr_t* locals,
139 intptr_t* stack,
140 intptr_t* stack_base,
141 intptr_t* monitor_base,
142 intptr_t* frame_bottom,
143 bool top_frame);
144
145 /*
146 * Generic 32-bit wide "Java slot" definition. This type occurs
147 * in operand stacks, Java locals, object fields, constant pools.
148 */
149 union VMJavaVal32 {
150 jint i;
151 jfloat f;
152 class oopDesc* r;
153 uint32_t raw;
154 };
155
156 /*
157 * Generic 64-bit Java value definition
158 */
159 union VMJavaVal64 {
160 jlong l;
161 jdouble d;
162 uint32_t v[2];
163 };
164
165 /*
166 * Generic 32-bit wide "Java slot" definition. This type occurs
167 * in Java locals, object fields, constant pools, and
168 * operand stacks (as a CVMStackVal32).
169 */
170 typedef union VMSlotVal32 {
171 VMJavaVal32 j; /* For "Java" values */
172 address a; /* a return created by jsr or jsr_w */
173 } VMSlotVal32;
174
175
176 /*
177 * Generic 32-bit wide stack slot definition.
178 */
179 union VMStackVal32 {
180 VMJavaVal32 j; /* For "Java" values */
181 VMSlotVal32 s; /* any value from a "slot" or locals[] */
182 };
183
184 inline JavaThread* thread() { return _thread; }
185
186 inline address bcp() { return _bcp; }
187 inline void set_bcp(address new_bcp) { _bcp = new_bcp; }
188
189 inline intptr_t* locals() { return _locals; }
190
191 inline ConstantPoolCache* constants() { return _constants; }
192 inline Method* method() { return _method; }
193 inline DataLayout* mdx() { return _mdx; }
194 inline void set_mdx(DataLayout *new_mdx) { _mdx = new_mdx; }
195
196 inline messages msg() { return _msg; }
197 inline void set_msg(messages new_msg) { _msg = new_msg; }
198
199 inline Method* callee() { return _result._to_call._callee; }
200 inline void set_callee(Method* new_callee) { _result._to_call._callee = new_callee; }
201 inline void set_callee_entry_point(address entry) { _result._to_call._callee_entry_point = entry; }
202 inline void set_osr_buf(address buf) { _result._osr._osr_buf = buf; }
203 inline void set_osr_entry(address entry) { _result._osr._osr_entry = entry; }
204 inline int bcp_advance() { return _result._to_call._bcp_advance; }
205 inline void set_bcp_advance(int count) { _result._to_call._bcp_advance = count; }
206
207 inline interpreterState prev() { return _prev_link; }
208
209 inline intptr_t* stack() { return _stack; }
210 inline void set_stack(intptr_t* new_stack) { _stack = new_stack; }
211
212
213 inline intptr_t* stack_base() { return _stack_base; }
214 inline intptr_t* stack_limit() { return _stack_limit; }
215
216 inline BasicObjectLock* monitor_base() { return _monitor_base; }
217
218 /*
219 * 64-bit Arithmetic:
220 *
221 * The functions below follow the semantics of the
222 * ladd, land, ldiv, lmul, lor, lxor, and lrem bytecodes,
223 * respectively.
224 */
225
226 static jlong VMlongAdd(jlong op1, jlong op2);
227 static jlong VMlongAnd(jlong op1, jlong op2);
228 static jlong VMlongDiv(jlong op1, jlong op2);
229 static jlong VMlongMul(jlong op1, jlong op2);
230 static jlong VMlongOr (jlong op1, jlong op2);
231 static jlong VMlongSub(jlong op1, jlong op2);
232 static jlong VMlongXor(jlong op1, jlong op2);
233 static jlong VMlongRem(jlong op1, jlong op2);
234
235 /*
236 * Shift:
237 *
238 * The functions below follow the semantics of the
239 * lushr, lshl, and lshr bytecodes, respectively.
240 */
241
242 static jlong VMlongUshr(jlong op1, jint op2);
243 static jlong VMlongShl (jlong op1, jint op2);
244 static jlong VMlongShr (jlong op1, jint op2);
245
246 /*
247 * Unary:
248 *
249 * Return the negation of "op" (-op), according to
250 * the semantics of the lneg bytecode.
251 */
252
253 static jlong VMlongNeg(jlong op);
254
255 /*
256 * Return the complement of "op" (~op)
257 */
258
259 static jlong VMlongNot(jlong op);
260
261
262 /*
263 * Comparisons to 0:
264 */
265
266 static int32_t VMlongLtz(jlong op); /* op <= 0 */
267 static int32_t VMlongGez(jlong op); /* op >= 0 */
268 static int32_t VMlongEqz(jlong op); /* op == 0 */
269
270 /*
271 * Between operands:
272 */
273
274 static int32_t VMlongEq(jlong op1, jlong op2); /* op1 == op2 */
275 static int32_t VMlongNe(jlong op1, jlong op2); /* op1 != op2 */
276 static int32_t VMlongGe(jlong op1, jlong op2); /* op1 >= op2 */
277 static int32_t VMlongLe(jlong op1, jlong op2); /* op1 <= op2 */
278 static int32_t VMlongLt(jlong op1, jlong op2); /* op1 < op2 */
279 static int32_t VMlongGt(jlong op1, jlong op2); /* op1 > op2 */
280
281 /*
282 * Comparisons (returning an jint value: 0, 1, or -1)
283 *
284 * Between operands:
285 *
286 * Compare "op1" and "op2" according to the semantics of the
287 * "lcmp" bytecode.
288 */
289
290 static int32_t VMlongCompare(jlong op1, jlong op2);
291
292 /*
293 * Convert int to long, according to "i2l" bytecode semantics
294 */
295 static jlong VMint2Long(jint val);
296
297 /*
298 * Convert long to int, according to "l2i" bytecode semantics
299 */
300 static jint VMlong2Int(jlong val);
301
302 /*
303 * Convert long to float, according to "l2f" bytecode semantics
304 */
305 static jfloat VMlong2Float(jlong val);
306
307 /*
308 * Convert long to double, according to "l2d" bytecode semantics
309 */
310 static jdouble VMlong2Double(jlong val);
311
312 /*
313 * Java floating-point float value manipulation.
314 *
315 * The result argument is, once again, an lvalue.
316 *
317 * Arithmetic:
318 *
319 * The functions below follow the semantics of the
320 * fadd, fsub, fmul, fdiv, and frem bytecodes,
321 * respectively.
322 */
323
324 static jfloat VMfloatAdd(jfloat op1, jfloat op2);
325 static jfloat VMfloatSub(jfloat op1, jfloat op2);
326 static jfloat VMfloatMul(jfloat op1, jfloat op2);
327 static jfloat VMfloatDiv(jfloat op1, jfloat op2);
328 static jfloat VMfloatRem(jfloat op1, jfloat op2);
329
330 /*
331 * Unary:
332 *
333 * Return the negation of "op" (-op), according to
334 * the semantics of the fneg bytecode.
335 */
336
337 static jfloat VMfloatNeg(jfloat op);
338
339 /*
340 * Comparisons (returning an int value: 0, 1, or -1)
341 *
342 * Between operands:
343 *
344 * Compare "op1" and "op2" according to the semantics of the
345 * "fcmpl" (direction is -1) or "fcmpg" (direction is 1) bytecodes.
346 */
347
348 static int32_t VMfloatCompare(jfloat op1, jfloat op2,
349 int32_t direction);
350 /*
351 * Conversion:
352 */
353
354 /*
355 * Convert float to double, according to "f2d" bytecode semantics
356 */
357
358 static jdouble VMfloat2Double(jfloat op);
359
360 /*
361 ******************************************
362 * Java double floating-point manipulation.
363 ******************************************
364 *
365 * The result argument is, once again, an lvalue.
366 *
367 * Conversions:
368 */
369
370 /*
371 * Convert double to int, according to "d2i" bytecode semantics
372 */
373
374 static jint VMdouble2Int(jdouble val);
375
376 /*
377 * Convert double to float, according to "d2f" bytecode semantics
378 */
379
380 static jfloat VMdouble2Float(jdouble val);
381
382 /*
383 * Convert int to double, according to "i2d" bytecode semantics
384 */
385
386 static jdouble VMint2Double(jint val);
387
388 /*
389 * Arithmetic:
390 *
391 * The functions below follow the semantics of the
392 * dadd, dsub, ddiv, dmul, and drem bytecodes, respectively.
393 */
394
395 static jdouble VMdoubleAdd(jdouble op1, jdouble op2);
396 static jdouble VMdoubleSub(jdouble op1, jdouble op2);
397 static jdouble VMdoubleDiv(jdouble op1, jdouble op2);
398 static jdouble VMdoubleMul(jdouble op1, jdouble op2);
399 static jdouble VMdoubleRem(jdouble op1, jdouble op2);
400
401 /*
402 * Unary:
403 *
404 * Return the negation of "op" (-op), according to
405 * the semantics of the dneg bytecode.
406 */
407
408 static jdouble VMdoubleNeg(jdouble op);
409
410 /*
411 * Comparisons (returning an int32_t value: 0, 1, or -1)
412 *
413 * Between operands:
414 *
415 * Compare "op1" and "op2" according to the semantics of the
416 * "dcmpl" (direction is -1) or "dcmpg" (direction is 1) bytecodes.
417 */
418
419 static int32_t VMdoubleCompare(jdouble op1, jdouble op2, int32_t direction);
420
421 /*
422 * Copy two typeless 32-bit words from one location to another.
423 * This is semantically equivalent to:
424 *
425 * to[0] = from[0];
426 * to[1] = from[1];
427 *
428 * but this interface is provided for those platforms that could
429 * optimize this into a single 64-bit transfer.
430 */
431
432 static void VMmemCopy64(uint32_t to[2], const uint32_t from[2]);
433
434
435 // Arithmetic operations
436
437 /*
438 * Java arithmetic methods.
439 * The functions below follow the semantics of the
440 * iadd, isub, imul, idiv, irem, iand, ior, ixor,
441 * and ineg bytecodes, respectively.
442 */
443
444 static jint VMintAdd(jint op1, jint op2);
445 static jint VMintSub(jint op1, jint op2);
446 static jint VMintMul(jint op1, jint op2);
447 static jint VMintDiv(jint op1, jint op2);
448 static jint VMintRem(jint op1, jint op2);
449 static jint VMintAnd(jint op1, jint op2);
450 static jint VMintOr (jint op1, jint op2);
451 static jint VMintXor(jint op1, jint op2);
452
453 /*
454 * Shift Operation:
455 * The functions below follow the semantics of the
456 * iushr, ishl, and ishr bytecodes, respectively.
457 */
458
459 static juint VMintUshr(jint op, jint num);
460 static jint VMintShl (jint op, jint num);
461 static jint VMintShr (jint op, jint num);
462
463 /*
464 * Unary Operation:
465 *
466 * Return the negation of "op" (-op), according to
467 * the semantics of the ineg bytecode.
468 */
469
470 static jint VMintNeg(jint op);
471
472 /*
473 * Int Conversions:
474 */
475
476 /*
477 * Convert int to float, according to "i2f" bytecode semantics
478 */
479
480 static jfloat VMint2Float(jint val);
481
482 /*
483 * Convert int to byte, according to "i2b" bytecode semantics
484 */
485
486 static jbyte VMint2Byte(jint val);
487
488 /*
489 * Convert int to char, according to "i2c" bytecode semantics
490 */
491
492 static jchar VMint2Char(jint val);
493
494 /*
495 * Convert int to short, according to "i2s" bytecode semantics
496 */
497
498 static jshort VMint2Short(jint val);
499
500 /*=========================================================================
501 * Bytecode interpreter operations
502 *=======================================================================*/
503
504 static void dup(intptr_t *tos);
505 static void dup2(intptr_t *tos);
506 static void dup_x1(intptr_t *tos); /* insert top word two down */
507 static void dup_x2(intptr_t *tos); /* insert top word three down */
508 static void dup2_x1(intptr_t *tos); /* insert top 2 slots three down */
509 static void dup2_x2(intptr_t *tos); /* insert top 2 slots four down */
510 static void swap(intptr_t *tos); /* swap top two elements */
511
512 // umm don't like this method modifies its object
513
514 // The Interpreter used when
515 static void run(interpreterState istate);
516 // The interpreter used if JVMTI needs interpreter events
517 static void runWithChecks(interpreterState istate);
518 static void End_Of_Interpreter(void);
519
520 // Inline static functions for Java Stack and Local manipulation
521
522 static address stack_slot(intptr_t *tos, int offset);
523 static jint stack_int(intptr_t *tos, int offset);
524 static jfloat stack_float(intptr_t *tos, int offset);
525 static oop stack_object(intptr_t *tos, int offset);
526 static jdouble stack_double(intptr_t *tos, int offset);
527 static jlong stack_long(intptr_t *tos, int offset);
528
529 // only used for value types
530 static void set_stack_slot(intptr_t *tos, address value, int offset);
531 static void set_stack_int(intptr_t *tos, int value, int offset);
532 static void set_stack_float(intptr_t *tos, jfloat value, int offset);
533 static void set_stack_object(intptr_t *tos, oop value, int offset);
534
535 // needs to be platform dep for the 32 bit platforms.
536 static void set_stack_double(intptr_t *tos, jdouble value, int offset);
537 static void set_stack_long(intptr_t *tos, jlong value, int offset);
538
539 static void set_stack_double_from_addr(intptr_t *tos, address addr, int offset);
540 static void set_stack_long_from_addr(intptr_t *tos, address addr, int offset);
541
542 // Locals
543
544 static address locals_slot(intptr_t* locals, int offset);
545 static jint locals_int(intptr_t* locals, int offset);
546 static jfloat locals_float(intptr_t* locals, int offset);
547 static oop locals_object(intptr_t* locals, int offset);
548 static jdouble locals_double(intptr_t* locals, int offset);
549 static jlong locals_long(intptr_t* locals, int offset);
550
551 static address locals_long_at(intptr_t* locals, int offset);
552 static address locals_double_at(intptr_t* locals, int offset);
553
554 static void set_locals_slot(intptr_t *locals, address value, int offset);
555 static void set_locals_int(intptr_t *locals, jint value, int offset);
556 static void set_locals_float(intptr_t *locals, jfloat value, int offset);
557 static void set_locals_object(intptr_t *locals, oop value, int offset);
558 static void set_locals_double(intptr_t *locals, jdouble value, int offset);
559 static void set_locals_long(intptr_t *locals, jlong value, int offset);
560 static void set_locals_double_from_addr(intptr_t *locals,
561 address addr, int offset);
562 static void set_locals_long_from_addr(intptr_t *locals,
563 address addr, int offset);
564
565 static void astore(intptr_t* topOfStack, int stack_offset,
566 intptr_t* locals, int locals_offset);
567
568 // Support for dup and swap
569 static void copy_stack_slot(intptr_t *tos, int from_offset, int to_offset);
570
571 #ifndef PRODUCT
572 static const char* C_msg(BytecodeInterpreter::messages msg);
573 void print();
574 #endif // PRODUCT
575
576 #ifdef ZERO
577 # include "bytecodeInterpreter_zero.hpp"
578 #else
579 #error "Only Zero Bytecode Interpreter is supported"
580 #endif
581
582
583 }; // BytecodeInterpreter
584
585 #endif // CC_INTERP
586
587 #endif // SHARE_VM_INTERPRETER_BYTECODEINTERPRETER_HPP