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src/share/vm/interpreter/bytecodes.hpp@f90c822e73f8
src/share/vm/interpreter/bytecodes.hpp
Wed, 27 Apr 2016 01:25:04 +0800
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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.
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 */
25 #ifndef SHARE_VM_INTERPRETER_BYTECODES_HPP
26 #define SHARE_VM_INTERPRETER_BYTECODES_HPP
28 #include "memory/allocation.hpp"
29 #include "utilities/top.hpp"
31 // Bytecodes specifies all bytecodes used in the VM and
32 // provides utility functions to get bytecode attributes.
34 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/interpreter/Bytecodes.java
35 class Bytecodes: AllStatic {
36 public:
37 enum Code {
38 _illegal = -1,
40 // Java bytecodes
41 _nop = 0, // 0x00
42 _aconst_null = 1, // 0x01
43 _iconst_m1 = 2, // 0x02
44 _iconst_0 = 3, // 0x03
45 _iconst_1 = 4, // 0x04
46 _iconst_2 = 5, // 0x05
47 _iconst_3 = 6, // 0x06
48 _iconst_4 = 7, // 0x07
49 _iconst_5 = 8, // 0x08
50 _lconst_0 = 9, // 0x09
51 _lconst_1 = 10, // 0x0a
52 _fconst_0 = 11, // 0x0b
53 _fconst_1 = 12, // 0x0c
54 _fconst_2 = 13, // 0x0d
55 _dconst_0 = 14, // 0x0e
56 _dconst_1 = 15, // 0x0f
57 _bipush = 16, // 0x10
58 _sipush = 17, // 0x11
59 _ldc = 18, // 0x12
60 _ldc_w = 19, // 0x13
61 _ldc2_w = 20, // 0x14
62 _iload = 21, // 0x15
63 _lload = 22, // 0x16
64 _fload = 23, // 0x17
65 _dload = 24, // 0x18
66 _aload = 25, // 0x19
67 _iload_0 = 26, // 0x1a
68 _iload_1 = 27, // 0x1b
69 _iload_2 = 28, // 0x1c
70 _iload_3 = 29, // 0x1d
71 _lload_0 = 30, // 0x1e
72 _lload_1 = 31, // 0x1f
73 _lload_2 = 32, // 0x20
74 _lload_3 = 33, // 0x21
75 _fload_0 = 34, // 0x22
76 _fload_1 = 35, // 0x23
77 _fload_2 = 36, // 0x24
78 _fload_3 = 37, // 0x25
79 _dload_0 = 38, // 0x26
80 _dload_1 = 39, // 0x27
81 _dload_2 = 40, // 0x28
82 _dload_3 = 41, // 0x29
83 _aload_0 = 42, // 0x2a
84 _aload_1 = 43, // 0x2b
85 _aload_2 = 44, // 0x2c
86 _aload_3 = 45, // 0x2d
87 _iaload = 46, // 0x2e
88 _laload = 47, // 0x2f
89 _faload = 48, // 0x30
90 _daload = 49, // 0x31
91 _aaload = 50, // 0x32
92 _baload = 51, // 0x33
93 _caload = 52, // 0x34
94 _saload = 53, // 0x35
95 _istore = 54, // 0x36
96 _lstore = 55, // 0x37
97 _fstore = 56, // 0x38
98 _dstore = 57, // 0x39
99 _astore = 58, // 0x3a
100 _istore_0 = 59, // 0x3b
101 _istore_1 = 60, // 0x3c
102 _istore_2 = 61, // 0x3d
103 _istore_3 = 62, // 0x3e
104 _lstore_0 = 63, // 0x3f
105 _lstore_1 = 64, // 0x40
106 _lstore_2 = 65, // 0x41
107 _lstore_3 = 66, // 0x42
108 _fstore_0 = 67, // 0x43
109 _fstore_1 = 68, // 0x44
110 _fstore_2 = 69, // 0x45
111 _fstore_3 = 70, // 0x46
112 _dstore_0 = 71, // 0x47
113 _dstore_1 = 72, // 0x48
114 _dstore_2 = 73, // 0x49
115 _dstore_3 = 74, // 0x4a
116 _astore_0 = 75, // 0x4b
117 _astore_1 = 76, // 0x4c
118 _astore_2 = 77, // 0x4d
119 _astore_3 = 78, // 0x4e
120 _iastore = 79, // 0x4f
121 _lastore = 80, // 0x50
122 _fastore = 81, // 0x51
123 _dastore = 82, // 0x52
124 _aastore = 83, // 0x53
125 _bastore = 84, // 0x54
126 _castore = 85, // 0x55
127 _sastore = 86, // 0x56
128 _pop = 87, // 0x57
129 _pop2 = 88, // 0x58
130 _dup = 89, // 0x59
131 _dup_x1 = 90, // 0x5a
132 _dup_x2 = 91, // 0x5b
133 _dup2 = 92, // 0x5c
134 _dup2_x1 = 93, // 0x5d
135 _dup2_x2 = 94, // 0x5e
136 _swap = 95, // 0x5f
137 _iadd = 96, // 0x60
138 _ladd = 97, // 0x61
139 _fadd = 98, // 0x62
140 _dadd = 99, // 0x63
141 _isub = 100, // 0x64
142 _lsub = 101, // 0x65
143 _fsub = 102, // 0x66
144 _dsub = 103, // 0x67
145 _imul = 104, // 0x68
146 _lmul = 105, // 0x69
147 _fmul = 106, // 0x6a
148 _dmul = 107, // 0x6b
149 _idiv = 108, // 0x6c
150 _ldiv = 109, // 0x6d
151 _fdiv = 110, // 0x6e
152 _ddiv = 111, // 0x6f
153 _irem = 112, // 0x70
154 _lrem = 113, // 0x71
155 _frem = 114, // 0x72
156 _drem = 115, // 0x73
157 _ineg = 116, // 0x74
158 _lneg = 117, // 0x75
159 _fneg = 118, // 0x76
160 _dneg = 119, // 0x77
161 _ishl = 120, // 0x78
162 _lshl = 121, // 0x79
163 _ishr = 122, // 0x7a
164 _lshr = 123, // 0x7b
165 _iushr = 124, // 0x7c
166 _lushr = 125, // 0x7d
167 _iand = 126, // 0x7e
168 _land = 127, // 0x7f
169 _ior = 128, // 0x80
170 _lor = 129, // 0x81
171 _ixor = 130, // 0x82
172 _lxor = 131, // 0x83
173 _iinc = 132, // 0x84
174 _i2l = 133, // 0x85
175 _i2f = 134, // 0x86
176 _i2d = 135, // 0x87
177 _l2i = 136, // 0x88
178 _l2f = 137, // 0x89
179 _l2d = 138, // 0x8a
180 _f2i = 139, // 0x8b
181 _f2l = 140, // 0x8c
182 _f2d = 141, // 0x8d
183 _d2i = 142, // 0x8e
184 _d2l = 143, // 0x8f
185 _d2f = 144, // 0x90
186 _i2b = 145, // 0x91
187 _i2c = 146, // 0x92
188 _i2s = 147, // 0x93
189 _lcmp = 148, // 0x94
190 _fcmpl = 149, // 0x95
191 _fcmpg = 150, // 0x96
192 _dcmpl = 151, // 0x97
193 _dcmpg = 152, // 0x98
194 _ifeq = 153, // 0x99
195 _ifne = 154, // 0x9a
196 _iflt = 155, // 0x9b
197 _ifge = 156, // 0x9c
198 _ifgt = 157, // 0x9d
199 _ifle = 158, // 0x9e
200 _if_icmpeq = 159, // 0x9f
201 _if_icmpne = 160, // 0xa0
202 _if_icmplt = 161, // 0xa1
203 _if_icmpge = 162, // 0xa2
204 _if_icmpgt = 163, // 0xa3
205 _if_icmple = 164, // 0xa4
206 _if_acmpeq = 165, // 0xa5
207 _if_acmpne = 166, // 0xa6
208 _goto = 167, // 0xa7
209 _jsr = 168, // 0xa8
210 _ret = 169, // 0xa9
211 _tableswitch = 170, // 0xaa
212 _lookupswitch = 171, // 0xab
213 _ireturn = 172, // 0xac
214 _lreturn = 173, // 0xad
215 _freturn = 174, // 0xae
216 _dreturn = 175, // 0xaf
217 _areturn = 176, // 0xb0
218 _return = 177, // 0xb1
219 _getstatic = 178, // 0xb2
220 _putstatic = 179, // 0xb3
221 _getfield = 180, // 0xb4
222 _putfield = 181, // 0xb5
223 _invokevirtual = 182, // 0xb6
224 _invokespecial = 183, // 0xb7
225 _invokestatic = 184, // 0xb8
226 _invokeinterface = 185, // 0xb9
227 _invokedynamic = 186, // 0xba // if EnableInvokeDynamic
228 _new = 187, // 0xbb
229 _newarray = 188, // 0xbc
230 _anewarray = 189, // 0xbd
231 _arraylength = 190, // 0xbe
232 _athrow = 191, // 0xbf
233 _checkcast = 192, // 0xc0
234 _instanceof = 193, // 0xc1
235 _monitorenter = 194, // 0xc2
236 _monitorexit = 195, // 0xc3
237 _wide = 196, // 0xc4
238 _multianewarray = 197, // 0xc5
239 _ifnull = 198, // 0xc6
240 _ifnonnull = 199, // 0xc7
241 _goto_w = 200, // 0xc8
242 _jsr_w = 201, // 0xc9
243 _breakpoint = 202, // 0xca
245 number_of_java_codes,
247 // JVM bytecodes
248 _fast_agetfield = number_of_java_codes,
249 _fast_bgetfield ,
250 _fast_cgetfield ,
251 _fast_dgetfield ,
252 _fast_fgetfield ,
253 _fast_igetfield ,
254 _fast_lgetfield ,
255 _fast_sgetfield ,
257 _fast_aputfield ,
258 _fast_bputfield ,
259 _fast_cputfield ,
260 _fast_dputfield ,
261 _fast_fputfield ,
262 _fast_iputfield ,
263 _fast_lputfield ,
264 _fast_sputfield ,
266 _fast_aload_0 ,
267 _fast_iaccess_0 ,
268 _fast_aaccess_0 ,
269 _fast_faccess_0 ,
271 _fast_iload ,
272 _fast_iload2 ,
273 _fast_icaload ,
275 _fast_invokevfinal ,
276 _fast_linearswitch ,
277 _fast_binaryswitch ,
279 // special handling of oop constants:
280 _fast_aldc ,
281 _fast_aldc_w ,
283 _return_register_finalizer ,
285 // special handling of signature-polymorphic methods:
286 _invokehandle ,
288 _shouldnotreachhere, // For debugging
290 // Platform specific JVM bytecodes
291 #ifdef TARGET_ARCH_x86
292 # include "bytecodes_x86.hpp"
293 #endif
294 #ifdef TARGET_ARCH_sparc
295 # include "bytecodes_sparc.hpp"
296 #endif
297 #ifdef TARGET_ARCH_zero
298 # include "bytecodes_zero.hpp"
299 #endif
300 #ifdef TARGET_ARCH_arm
301 # include "bytecodes_arm.hpp"
302 #endif
303 #ifdef TARGET_ARCH_ppc
304 # include "bytecodes_ppc.hpp"
305 #endif
308 number_of_codes
309 };
311 // Flag bits derived from format strings, can_trap, can_rewrite, etc.:
312 enum Flags {
313 // semantic flags:
314 _bc_can_trap = 1<<0, // bytecode execution can trap or block
315 _bc_can_rewrite = 1<<1, // bytecode execution has an alternate form
317 // format bits (determined only by the format string):
318 _fmt_has_c = 1<<2, // constant, such as sipush "bcc"
319 _fmt_has_j = 1<<3, // constant pool cache index, such as getfield "bjj"
320 _fmt_has_k = 1<<4, // constant pool index, such as ldc "bk"
321 _fmt_has_i = 1<<5, // local index, such as iload
322 _fmt_has_o = 1<<6, // offset, such as ifeq
323 _fmt_has_nbo = 1<<7, // contains native-order field(s)
324 _fmt_has_u2 = 1<<8, // contains double-byte field(s)
325 _fmt_has_u4 = 1<<9, // contains quad-byte field
326 _fmt_not_variable = 1<<10, // not of variable length (simple or wide)
327 _fmt_not_simple = 1<<11, // either wide or variable length
328 _all_fmt_bits = (_fmt_not_simple*2 - _fmt_has_c),
330 // Example derived format syndromes:
331 _fmt_b = _fmt_not_variable,
332 _fmt_bc = _fmt_b | _fmt_has_c,
333 _fmt_bi = _fmt_b | _fmt_has_i,
334 _fmt_bkk = _fmt_b | _fmt_has_k | _fmt_has_u2,
335 _fmt_bJJ = _fmt_b | _fmt_has_j | _fmt_has_u2 | _fmt_has_nbo,
336 _fmt_bo2 = _fmt_b | _fmt_has_o | _fmt_has_u2,
337 _fmt_bo4 = _fmt_b | _fmt_has_o | _fmt_has_u4
338 };
340 private:
341 static bool _is_initialized;
342 static const char* _name [number_of_codes];
343 static BasicType _result_type [number_of_codes];
344 static s_char _depth [number_of_codes];
345 static u_char _lengths [number_of_codes];
346 static Code _java_code [number_of_codes];
347 static jchar _flags [(1<<BitsPerByte)*2]; // all second page for wide formats
349 static void def(Code code, const char* name, const char* format, const char* wide_format, BasicType result_type, int depth, bool can_trap);
350 static void def(Code code, const char* name, const char* format, const char* wide_format, BasicType result_type, int depth, bool can_trap, Code java_code);
351 static void pd_initialize(); // platform specific initialization
352 static Code pd_base_code_for(Code code); // platform specific base_code_for implementation
354 // Verify that bcp points into method
355 #ifdef ASSERT
356 static bool check_method(const Method* method, address bcp);
357 #endif
358 static bool check_must_rewrite(Bytecodes::Code bc);
360 public:
361 // Conversion
362 static void check (Code code) { assert(is_defined(code), err_msg("illegal code: %d", (int)code)); }
363 static void wide_check (Code code) { assert(wide_is_defined(code), err_msg("illegal code: %d", (int)code)); }
364 static Code cast (int code) { return (Code)code; }
367 // Fetch a bytecode, hiding breakpoints as necessary. The method
368 // argument is used for conversion of breakpoints into the original
369 // bytecode. The CI uses these methods but guarantees that
370 // breakpoints are hidden so the method argument should be passed as
371 // NULL since in that case the bcp and Method* are unrelated
372 // memory.
373 static Code code_at(const Method* method, address bcp) {
374 assert(method == NULL || check_method(method, bcp), "bcp must point into method");
375 Code code = cast(*bcp);
376 assert(code != _breakpoint || method != NULL, "need Method* to decode breakpoint");
377 return (code != _breakpoint) ? code : non_breakpoint_code_at(method, bcp);
378 }
379 static Code java_code_at(const Method* method, address bcp) {
380 return java_code(code_at(method, bcp));
381 }
383 // Fetch a bytecode or a breakpoint:
384 static Code code_or_bp_at(address bcp) { return (Code)cast(*bcp); }
386 static Code code_at(Method* method, int bci);
387 static bool is_active_breakpoint_at(address bcp) { return (Code)*bcp == _breakpoint; }
389 // find a bytecode, behind a breakpoint if necessary:
390 static Code non_breakpoint_code_at(const Method* method, address bcp);
392 // Bytecode attributes
393 static bool is_defined (int code) { return 0 <= code && code < number_of_codes && flags(code, false) != 0; }
394 static bool wide_is_defined(int code) { return is_defined(code) && flags(code, true) != 0; }
395 static const char* name (Code code) { check(code); return _name [code]; }
396 static BasicType result_type (Code code) { check(code); return _result_type [code]; }
397 static int depth (Code code) { check(code); return _depth [code]; }
398 // Note: Length functions must return <=0 for invalid bytecodes.
399 // Calling check(code) in length functions would throw an unwanted assert.
400 static int length_for (Code code) { /*no check*/ return _lengths [code] & 0xF; }
401 static int wide_length_for(Code code) { /*no check*/ return _lengths [code] >> 4; }
402 static bool can_trap (Code code) { check(code); return has_all_flags(code, _bc_can_trap, false); }
403 static Code java_code (Code code) { check(code); return _java_code [code]; }
404 static bool can_rewrite (Code code) { check(code); return has_all_flags(code, _bc_can_rewrite, false); }
405 static bool must_rewrite(Bytecodes::Code code) { return can_rewrite(code) && check_must_rewrite(code); }
406 static bool native_byte_order(Code code) { check(code); return has_all_flags(code, _fmt_has_nbo, false); }
407 static bool uses_cp_cache (Code code) { check(code); return has_all_flags(code, _fmt_has_j, false); }
408 // if 'end' is provided, it indicates the end of the code buffer which
409 // should not be read past when parsing.
410 static int special_length_at(Bytecodes::Code code, address bcp, address end = NULL);
411 static int special_length_at(Method* method, address bcp, address end = NULL) { return special_length_at(code_at(method, bcp), bcp, end); }
412 static int raw_special_length_at(address bcp, address end = NULL);
413 static int length_for_code_at(Bytecodes::Code code, address bcp) { int l = length_for(code); return l > 0 ? l : special_length_at(code, bcp); }
414 static int length_at (Method* method, address bcp) { return length_for_code_at(code_at(method, bcp), bcp); }
415 static int java_length_at (Method* method, address bcp) { return length_for_code_at(java_code_at(method, bcp), bcp); }
416 static bool is_java_code (Code code) { return 0 <= code && code < number_of_java_codes; }
418 static bool is_aload (Code code) { return (code == _aload || code == _aload_0 || code == _aload_1
419 || code == _aload_2 || code == _aload_3); }
420 static bool is_astore (Code code) { return (code == _astore || code == _astore_0 || code == _astore_1
421 || code == _astore_2 || code == _astore_3); }
423 static bool is_zero_const (Code code) { return (code == _aconst_null || code == _iconst_0
424 || code == _fconst_0 || code == _dconst_0); }
425 static bool is_invoke (Code code) { return (_invokevirtual <= code && code <= _invokedynamic); }
426 static bool has_receiver (Code code) { assert(is_invoke(code), ""); return code == _invokevirtual ||
427 code == _invokespecial ||
428 code == _invokeinterface; }
429 static bool has_optional_appendix(Code code) { return code == _invokedynamic || code == _invokehandle; }
431 static int compute_flags (const char* format, int more_flags = 0); // compute the flags
432 static int flags (int code, bool is_wide) {
433 assert(code == (u_char)code, "must be a byte");
434 return _flags[code + (is_wide ? (1<<BitsPerByte) : 0)];
435 }
436 static int format_bits (Code code, bool is_wide) { return flags(code, is_wide) & _all_fmt_bits; }
437 static bool has_all_flags (Code code, int test_flags, bool is_wide) {
438 return (flags(code, is_wide) & test_flags) == test_flags;
439 }
441 // Initialization
442 static void initialize ();
443 };
445 #endif // SHARE_VM_INTERPRETER_BYTECODES_HPP
