-
Bytecodes
-
_illegal: int
-
_nop: int
-
_aconst_null: int
-
_iconst_m1: int
-
_iconst_0: int
-
_iconst_1: int
-
_iconst_2: int
-
_iconst_3: int
-
_iconst_4: int
-
_iconst_5: int
-
_lconst_0: int
-
_lconst_1: int
-
_fconst_0: int
-
_fconst_1: int
-
_fconst_2: int
-
_dconst_0: int
-
_dconst_1: int
-
_bipush: int
-
_sipush: int
-
_ldc: int
-
_ldc_w: int
-
_ldc2_w: int
-
_iload: int
-
_lload: int
-
_fload: int
-
_dload: int
-
_aload: int
-
_iload_0: int
-
_iload_1: int
-
_iload_2: int
-
_iload_3: int
-
_lload_0: int
-
_lload_1: int
-
_lload_2: int
-
_lload_3: int
-
_fload_0: int
-
_fload_1: int
-
_fload_2: int
-
_fload_3: int
-
_dload_0: int
-
_dload_1: int
-
_dload_2: int
-
_dload_3: int
-
_aload_0: int
-
_aload_1: int
-
_aload_2: int
-
_aload_3: int
-
_iaload: int
-
_laload: int
-
_faload: int
-
_daload: int
-
_aaload: int
-
_baload: int
-
_caload: int
-
_saload: int
-
_istore: int
-
_lstore: int
-
_fstore: int
-
_dstore: int
-
_astore: int
-
_istore_0: int
-
_istore_1: int
-
_istore_2: int
-
_istore_3: int
-
_lstore_0: int
-
_lstore_1: int
-
_lstore_2: int
-
_lstore_3: int
-
_fstore_0: int
-
_fstore_1: int
-
_fstore_2: int
-
_fstore_3: int
-
_dstore_0: int
-
_dstore_1: int
-
_dstore_2: int
-
_dstore_3: int
-
_astore_0: int
-
_astore_1: int
-
_astore_2: int
-
_astore_3: int
-
_iastore: int
-
_lastore: int
-
_fastore: int
-
_dastore: int
-
_aastore: int
-
_bastore: int
-
_castore: int
-
_sastore: int
-
_pop: int
-
_pop2: int
-
_dup: int
-
_dup_x1: int
-
_dup_x2: int
-
_dup2: int
-
_dup2_x1: int
-
_dup2_x2: int
-
_swap: int
-
_iadd: int
-
_ladd: int
-
_fadd: int
-
_dadd: int
-
_isub: int
-
_lsub: int
-
_fsub: int
-
_dsub: int
-
_imul: int
-
_lmul: int
-
_fmul: int
-
_dmul: int
-
_idiv: int
-
_ldiv: int
-
_fdiv: int
-
_ddiv: int
-
_irem: int
-
_lrem: int
-
_frem: int
-
_drem: int
-
_ineg: int
-
_lneg: int
-
_fneg: int
-
_dneg: int
-
_ishl: int
-
_lshl: int
-
_ishr: int
-
_lshr: int
-
_iushr: int
-
_lushr: int
-
_iand: int
-
_land: int
-
_ior: int
-
_lor: int
-
_ixor: int
-
_lxor: int
-
_iinc: int
-
_i2l: int
-
_i2f: int
-
_i2d: int
-
_l2i: int
-
_l2f: int
-
_l2d: int
-
_f2i: int
-
_f2l: int
-
_f2d: int
-
_d2i: int
-
_d2l: int
-
_d2f: int
-
_i2b: int
-
_i2c: int
-
_i2s: int
-
_lcmp: int
-
_fcmpl: int
-
_fcmpg: int
-
_dcmpl: int
-
_dcmpg: int
-
_ifeq: int
-
_ifne: int
-
_iflt: int
-
_ifge: int
-
_ifgt: int
-
_ifle: int
-
_if_icmpeq: int
-
_if_icmpne: int
-
_if_icmplt: int
-
_if_icmpge: int
-
_if_icmpgt: int
-
_if_icmple: int
-
_if_acmpeq: int
-
_if_acmpne: int
-
_goto: int
-
_jsr: int
-
_ret: int
-
_tableswitch: int
-
_lookupswitch: int
-
_ireturn: int
-
_lreturn: int
-
_freturn: int
-
_dreturn: int
-
_areturn: int
-
_return: int
-
_getstatic: int
-
_putstatic: int
-
_getfield: int
-
_putfield: int
-
_invokevirtual: int
-
_invokespecial: int
-
_invokestatic: int
-
_invokeinterface: int
-
_invokedynamic: int
-
_new: int
-
_newarray: int
-
_anewarray: int
-
_arraylength: int
-
_athrow: int
-
_checkcast: int
-
_instanceof: int
-
_monitorenter: int
-
_monitorexit: int
-
_wide: int
-
_multianewarray: int
-
_ifnull: int
-
_ifnonnull: int
-
_goto_w: int
-
_jsr_w: int
-
_breakpoint: int
-
number_of_java_codes: int
-
_fast_agetfield: int
-
_fast_bgetfield: int
-
_fast_cgetfield: int
-
_fast_dgetfield: int
-
_fast_fgetfield: int
-
_fast_igetfield: int
-
_fast_lgetfield: int
-
_fast_sgetfield: int
-
_fast_aputfield: int
-
_fast_bputfield: int
-
_fast_zputfield: int
-
_fast_cputfield: int
-
_fast_dputfield: int
-
_fast_fputfield: int
-
_fast_iputfield: int
-
_fast_lputfield: int
-
_fast_sputfield: int
-
_fast_aload_0: int
-
_fast_iaccess_0: int
-
_fast_aaccess_0: int
-
_fast_faccess_0: int
-
_fast_iload: int
-
_fast_iload2: int
-
_fast_icaload: int
-
_fast_invokevfinal: int
-
_fast_linearswitch: int
-
_fast_binaryswitch: int
-
_fast_aldc: int
-
_fast_aldc_w: int
-
_return_register_finalizer: int
-
_invokehandle: int
-
_nofast_getfield: int
-
_nofast_putfield: int
-
_nofast_aload_0: int
-
_nofast_iload: int
-
_shouldnotreachhere: int
-
number_of_codes: int
-
_bc_can_trap: int
-
_bc_can_rewrite: int
-
_fmt_has_c: int
-
_fmt_has_j: int
-
_fmt_has_k: int
-
_fmt_has_i: int
-
_fmt_has_o: int
-
_fmt_has_nbo: int
-
_fmt_has_u2: int
-
_fmt_has_u4: int
-
_fmt_not_variable: int
-
_fmt_not_simple: int
-
_all_fmt_bits: int
-
_fmt_b: int
-
_fmt_bc: int
-
_fmt_bi: int
-
_fmt_bkk: int
-
_fmt_bJJ: int
-
_fmt_bo2: int
-
_fmt_bo4: int
-
specialLengthAt(Method, int): int
-
check(int): void
-
wideCheck(int): void
-
codeAt(Method, int): int
-
codeOrBPAt(Method, int): int
-
isActiveBreakpointAt(Method, int): boolean
-
isDefined(int): boolean
-
wideIsDefined(int): boolean
-
name(int): String
-
format(int): String
-
wideFormat(int): String
-
resultType(int): int
-
depth(int): int
-
lengthFor(int): int
-
wideLengthFor(int): int
-
canTrap(int): boolean
-
javaCode(int): int
-
canRewrite(int): boolean
-
native_byte_order(int): boolean
-
uses_cp_cache(int): boolean
-
lengthAt(Method, int): int
-
javaLengthAt(Method, int): int
-
isJavaCode(int): boolean
-
isFastCode(int): boolean
-
isAload(int): boolean
-
isAstore(int): boolean
-
isZeroConst(int): boolean
-
flags(int, boolean): int
-
format_bits(int, boolean): int
-
has_all_flags(int, int, boolean): boolean
-
compute_flags(String): char
-
compute_flags(String, int): char
-
_name: String[]
-
_format: String[]
-
_wide_format: String[]
-
_result_type: int[]
-
_depth: byte[]
-
_lengths: byte[]
-
_java_code: int[]
-
_flags: char[]
-
static class initializer
-
$1
-
jintSize: int
-
initialize(): void
-
def(int, String, String, String, int, int, boolean): void
-
def(int, String, String, String, int, int, boolean, int): void
-
/*
* Copyright (c) 2001, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
package sun.jvm.hotspot.interpreter;
import java.util.*;
import sun.jvm.hotspot.oops.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.utilities.*;
import sun.jvm.hotspot.utilities.Observable;
import sun.jvm.hotspot.utilities.Observer;
// Bytecodes specifies all bytecodes used in the VM and
// provides utility functions to get bytecode attributes.
public class Bytecodes {
public static final int _illegal = -1;
// Java bytecodes
public static final int _nop = 0; // 0x00
public static final int _aconst_null = 1; // 0x01
public static final int _iconst_m1 = 2; // 0x02
public static final int _iconst_0 = 3; // 0x03
public static final int _iconst_1 = 4; // 0x04
public static final int _iconst_2 = 5; // 0x05
public static final int _iconst_3 = 6; // 0x06
public static final int _iconst_4 = 7; // 0x07
public static final int _iconst_5 = 8; // 0x08
public static final int _lconst_0 = 9; // 0x09
public static final int _lconst_1 = 10; // 0x0a
public static final int _fconst_0 = 11; // 0x0b
public static final int _fconst_1 = 12; // 0x0c
public static final int _fconst_2 = 13; // 0x0d
public static final int _dconst_0 = 14; // 0x0e
public static final int _dconst_1 = 15; // 0x0f
public static final int _bipush = 16; // 0x10
public static final int _sipush = 17; // 0x11
public static final int _ldc = 18; // 0x12
public static final int _ldc_w = 19; // 0x13
public static final int _ldc2_w = 20; // 0x14
public static final int _iload = 21; // 0x15
public static final int _lload = 22; // 0x16
public static final int _fload = 23; // 0x17
public static final int _dload = 24; // 0x18
public static final int _aload = 25; // 0x19
public static final int _iload_0 = 26; // 0x1a
public static final int _iload_1 = 27; // 0x1b
public static final int _iload_2 = 28; // 0x1c
public static final int _iload_3 = 29; // 0x1d
public static final int _lload_0 = 30; // 0x1e
public static final int _lload_1 = 31; // 0x1f
public static final int _lload_2 = 32; // 0x20
public static final int _lload_3 = 33; // 0x21
public static final int _fload_0 = 34; // 0x22
public static final int _fload_1 = 35; // 0x23
public static final int _fload_2 = 36; // 0x24
public static final int _fload_3 = 37; // 0x25
public static final int _dload_0 = 38; // 0x26
public static final int _dload_1 = 39; // 0x27
public static final int _dload_2 = 40; // 0x28
public static final int _dload_3 = 41; // 0x29
public static final int _aload_0 = 42; // 0x2a
public static final int _aload_1 = 43; // 0x2b
public static final int _aload_2 = 44; // 0x2c
public static final int _aload_3 = 45; // 0x2d
public static final int _iaload = 46; // 0x2e
public static final int _laload = 47; // 0x2f
public static final int _faload = 48; // 0x30
public static final int _daload = 49; // 0x31
public static final int _aaload = 50; // 0x32
public static final int _baload = 51; // 0x33
public static final int _caload = 52; // 0x34
public static final int _saload = 53; // 0x35
public static final int _istore = 54; // 0x36
public static final int _lstore = 55; // 0x37
public static final int _fstore = 56; // 0x38
public static final int _dstore = 57; // 0x39
public static final int _astore = 58; // 0x3a
public static final int _istore_0 = 59; // 0x3b
public static final int _istore_1 = 60; // 0x3c
public static final int _istore_2 = 61; // 0x3d
public static final int _istore_3 = 62; // 0x3e
public static final int _lstore_0 = 63; // 0x3f
public static final int _lstore_1 = 64; // 0x40
public static final int _lstore_2 = 65; // 0x41
public static final int _lstore_3 = 66; // 0x42
public static final int _fstore_0 = 67; // 0x43
public static final int _fstore_1 = 68; // 0x44
public static final int _fstore_2 = 69; // 0x45
public static final int _fstore_3 = 70; // 0x46
public static final int _dstore_0 = 71; // 0x47
public static final int _dstore_1 = 72; // 0x48
public static final int _dstore_2 = 73; // 0x49
public static final int _dstore_3 = 74; // 0x4a
public static final int _astore_0 = 75; // 0x4b
public static final int _astore_1 = 76; // 0x4c
public static final int _astore_2 = 77; // 0x4d
public static final int _astore_3 = 78; // 0x4e
public static final int _iastore = 79; // 0x4f
public static final int _lastore = 80; // 0x50
public static final int _fastore = 81; // 0x51
public static final int _dastore = 82; // 0x52
public static final int _aastore = 83; // 0x53
public static final int _bastore = 84; // 0x54
public static final int _castore = 85; // 0x55
public static final int _sastore = 86; // 0x56
public static final int _pop = 87; // 0x57
public static final int _pop2 = 88; // 0x58
public static final int _dup = 89; // 0x59
public static final int _dup_x1 = 90; // 0x5a
public static final int _dup_x2 = 91; // 0x5b
public static final int _dup2 = 92; // 0x5c
public static final int _dup2_x1 = 93; // 0x5d
public static final int _dup2_x2 = 94; // 0x5e
public static final int _swap = 95; // 0x5f
public static final int _iadd = 96; // 0x60
public static final int _ladd = 97; // 0x61
public static final int _fadd = 98; // 0x62
public static final int _dadd = 99; // 0x63
public static final int _isub = 100; // 0x64
public static final int _lsub = 101; // 0x65
public static final int _fsub = 102; // 0x66
public static final int _dsub = 103; // 0x67
public static final int _imul = 104; // 0x68
public static final int _lmul = 105; // 0x69
public static final int _fmul = 106; // 0x6a
public static final int _dmul = 107; // 0x6b
public static final int _idiv = 108; // 0x6c
public static final int _ldiv = 109; // 0x6d
public static final int _fdiv = 110; // 0x6e
public static final int _ddiv = 111; // 0x6f
public static final int _irem = 112; // 0x70
public static final int _lrem = 113; // 0x71
public static final int _frem = 114; // 0x72
public static final int _drem = 115; // 0x73
public static final int _ineg = 116; // 0x74
public static final int _lneg = 117; // 0x75
public static final int _fneg = 118; // 0x76
public static final int _dneg = 119; // 0x77
public static final int _ishl = 120; // 0x78
public static final int _lshl = 121; // 0x79
public static final int _ishr = 122; // 0x7a
public static final int _lshr = 123; // 0x7b
public static final int _iushr = 124; // 0x7c
public static final int _lushr = 125; // 0x7d
public static final int _iand = 126; // 0x7e
public static final int _land = 127; // 0x7f
public static final int _ior = 128; // 0x80
public static final int _lor = 129; // 0x81
public static final int _ixor = 130; // 0x82
public static final int _lxor = 131; // 0x83
public static final int _iinc = 132; // 0x84
public static final int _i2l = 133; // 0x85
public static final int _i2f = 134; // 0x86
public static final int _i2d = 135; // 0x87
public static final int _l2i = 136; // 0x88
public static final int _l2f = 137; // 0x89
public static final int _l2d = 138; // 0x8a
public static final int _f2i = 139; // 0x8b
public static final int _f2l = 140; // 0x8c
public static final int _f2d = 141; // 0x8d
public static final int _d2i = 142; // 0x8e
public static final int _d2l = 143; // 0x8f
public static final int _d2f = 144; // 0x90
public static final int _i2b = 145; // 0x91
public static final int _i2c = 146; // 0x92
public static final int _i2s = 147; // 0x93
public static final int _lcmp = 148; // 0x94
public static final int _fcmpl = 149; // 0x95
public static final int _fcmpg = 150; // 0x96
public static final int _dcmpl = 151; // 0x97
public static final int _dcmpg = 152; // 0x98
public static final int _ifeq = 153; // 0x99
public static final int _ifne = 154; // 0x9a
public static final int _iflt = 155; // 0x9b
public static final int _ifge = 156; // 0x9c
public static final int _ifgt = 157; // 0x9d
public static final int _ifle = 158; // 0x9e
public static final int _if_icmpeq = 159; // 0x9f
public static final int _if_icmpne = 160; // 0xa0
public static final int _if_icmplt = 161; // 0xa1
public static final int _if_icmpge = 162; // 0xa2
public static final int _if_icmpgt = 163; // 0xa3
public static final int _if_icmple = 164; // 0xa4
public static final int _if_acmpeq = 165; // 0xa5
public static final int _if_acmpne = 166; // 0xa6
public static final int _goto = 167; // 0xa7
public static final int _jsr = 168; // 0xa8
public static final int _ret = 169; // 0xa9
public static final int _tableswitch = 170; // 0xaa
public static final int _lookupswitch = 171; // 0xab
public static final int _ireturn = 172; // 0xac
public static final int _lreturn = 173; // 0xad
public static final int _freturn = 174; // 0xae
public static final int _dreturn = 175; // 0xaf
public static final int _areturn = 176; // 0xb0
public static final int _return = 177; // 0xb1
public static final int _getstatic = 178; // 0xb2
public static final int _putstatic = 179; // 0xb3
public static final int _getfield = 180; // 0xb4
public static final int _putfield = 181; // 0xb5
public static final int _invokevirtual = 182; // 0xb6
public static final int _invokespecial = 183; // 0xb7
public static final int _invokestatic = 184; // 0xb8
public static final int _invokeinterface = 185; // 0xb9
public static final int _invokedynamic = 186; // 0xba
public static final int _new = 187; // 0xbb
public static final int _newarray = 188; // 0xbc
public static final int _anewarray = 189; // 0xbd
public static final int _arraylength = 190; // 0xbe
public static final int _athrow = 191; // 0xbf
public static final int _checkcast = 192; // 0xc0
public static final int _instanceof = 193; // 0xc1
public static final int _monitorenter = 194; // 0xc2
public static final int _monitorexit = 195; // 0xc3
public static final int _wide = 196; // 0xc4
public static final int _multianewarray = 197; // 0xc5
public static final int _ifnull = 198; // 0xc6
public static final int _ifnonnull = 199; // 0xc7
public static final int _goto_w = 200; // 0xc8
public static final int _jsr_w = 201; // 0xc9
public static final int _breakpoint = 202; // 0xca
public static final int number_of_java_codes = 203;
// JVM bytecodes
public static final int _fast_agetfield = number_of_java_codes;
public static final int _fast_bgetfield = 204;
public static final int _fast_cgetfield = 205;
public static final int _fast_dgetfield = 206;
public static final int _fast_fgetfield = 207;
public static final int _fast_igetfield = 208;
public static final int _fast_lgetfield = 209;
public static final int _fast_sgetfield = 210;
public static final int _fast_aputfield = 211;
public static final int _fast_bputfield = 212;
public static final int _fast_zputfield = 213;
public static final int _fast_cputfield = 214;
public static final int _fast_dputfield = 215;
public static final int _fast_fputfield = 216;
public static final int _fast_iputfield = 217;
public static final int _fast_lputfield = 218;
public static final int _fast_sputfield = 219;
public static final int _fast_aload_0 = 220;
public static final int _fast_iaccess_0 = 221;
public static final int _fast_aaccess_0 = 222;
public static final int _fast_faccess_0 = 223;
public static final int _fast_iload = 224;
public static final int _fast_iload2 = 225;
public static final int _fast_icaload = 226;
public static final int _fast_invokevfinal = 227;
public static final int _fast_linearswitch = 228;
public static final int _fast_binaryswitch = 229;
public static final int _fast_aldc = 230;
public static final int _fast_aldc_w = 231;
public static final int _return_register_finalizer = 232;
public static final int _invokehandle = 233;
// Bytecodes rewritten at CDS dump time
public static final int _nofast_getfield = 234;
public static final int _nofast_putfield = 235;
public static final int _nofast_aload_0 = 236;
public static final int _nofast_iload = 237;
public static final int _shouldnotreachhere = 238; // For debugging
public static final int number_of_codes = 239;
// Flag bits derived from format strings, can_trap, can_rewrite, etc.:
// semantic flags:
static final int _bc_can_trap = 1<<0; // bytecode execution can trap or block
static final int _bc_can_rewrite = 1<<1; // bytecode execution has an alternate form
// format bits (determined only by the format string):
static final int _fmt_has_c = 1<<2; // constant, such as sipush "bcc"
static final int _fmt_has_j = 1<<3; // constant pool cache index, such as getfield "bjj"
static final int _fmt_has_k = 1<<4; // constant pool index, such as ldc "bk"
static final int _fmt_has_i = 1<<5; // local index, such as iload
static final int _fmt_has_o = 1<<6; // offset, such as ifeq
static final int _fmt_has_nbo = 1<<7; // contains native-order field(s)
static final int _fmt_has_u2 = 1<<8; // contains double-byte field(s)
static final int _fmt_has_u4 = 1<<9; // contains quad-byte field
static final int _fmt_not_variable = 1<<10; // not of variable length (simple or wide)
static final int _fmt_not_simple = 1<<11; // either wide or variable length
static final int _all_fmt_bits = (_fmt_not_simple*2 - _fmt_has_c);
// Example derived format syndromes:
static final int _fmt_b = _fmt_not_variable;
static final int _fmt_bc = _fmt_b | _fmt_has_c;
static final int _fmt_bi = _fmt_b | _fmt_has_i;
static final int _fmt_bkk = _fmt_b | _fmt_has_k | _fmt_has_u2;
static final int _fmt_bJJ = _fmt_b | _fmt_has_j | _fmt_has_u2 | _fmt_has_nbo;
static final int _fmt_bo2 = _fmt_b | _fmt_has_o | _fmt_has_u2;
static final int _fmt_bo4 = _fmt_b | _fmt_has_o | _fmt_has_u4;
public static int specialLengthAt(Method method, int bci) {
int code = codeAt(method, bci);
switch (code) {
case _wide:
return wideLengthFor(method.getBytecodeOrBPAt(bci + 1));
case _tableswitch:
{
int alignedBCI = Bits.roundTo(bci + 1, jintSize);
int lo = method.getBytecodeIntArg(alignedBCI + 1*jintSize);
int hi = method.getBytecodeIntArg(alignedBCI + 2*jintSize);
return (alignedBCI - bci) + (3 + hi - lo + 1)*jintSize;
}
case _lookupswitch: // fall through
case _fast_binaryswitch: // fall through
case _fast_linearswitch:
{
int alignedBCI = Bits.roundTo(bci + 1, jintSize);
int npairs = method.getBytecodeIntArg(alignedBCI + jintSize);
return (alignedBCI - bci) + (2 + 2*npairs)*jintSize;
}
}
throw new RuntimeException("should not reach here");
}
// Conversion
public static void check(int code) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(isDefined(code), "illegal code " + code);
}
}
public static void wideCheck(int code) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(wideIsDefined(code), "illegal code " + code);
}
}
Fetches a bytecode, hiding breakpoints as necessary /** Fetches a bytecode, hiding breakpoints as necessary */
public static int codeAt(Method method, int bci) {
int res = codeOrBPAt(method, bci);
if (res == _breakpoint) {
res = method.getOrigBytecodeAt(bci);
}
return res;
}
Fetches a bytecode or a breakpoint /** Fetches a bytecode or a breakpoint */
public static int codeOrBPAt(Method method, int bci) {
return method.getBytecodeOrBPAt(bci);
}
public static boolean isActiveBreakpointAt(Method method, int bci) {
return (codeOrBPAt(method, bci) == _breakpoint);
}
// find a bytecode, behind a breakpoint if necessary:
// FIXME: not yet implementable
// static Code non_breakpoint_code_at(address bcp, Method* method = null);
// Bytecode attributes
public static boolean isDefined (int code) { return 0 <= code && code < number_of_codes && flags(code, false) != 0; }
public static boolean wideIsDefined(int code) { return isDefined(code) && flags(code, true) != 0; }
public static String name (int code) { check(code); return _name [code]; }
public static String format (int code) { check(code); return _format [code]; }
public static String wideFormat (int code) { wideCheck(code); return _wide_format [code]; }
public static int resultType (int code) { check(code); return _result_type [code]; }
public static int depth (int code) { check(code); return _depth [code]; }
public static int lengthFor (int code) { check(code); return _lengths [code] & 0xF; }
public static int wideLengthFor(int code) { check(code); return _lengths [code] >> 4; }
public static boolean canTrap (int code) { check(code); return has_all_flags(code, _bc_can_trap, false); }
public static int javaCode (int code) { check(code); return _java_code [code]; }
public static boolean canRewrite (int code) { check(code); return has_all_flags(code, _bc_can_rewrite, false); }
public static boolean native_byte_order(int code) { check(code); return has_all_flags(code, _fmt_has_nbo, false); }
public static boolean uses_cp_cache (int code) { check(code); return has_all_flags(code, _fmt_has_j, false); }
public static int lengthAt (Method method, int bci) { int l = lengthFor(codeAt(method, bci)); return l > 0 ? l : specialLengthAt(method, bci); }
public static int javaLengthAt (Method method, int bci) { int l = lengthFor(javaCode(codeAt(method, bci))); return l > 0 ? l : specialLengthAt(method, bci); }
public static boolean isJavaCode (int code) { return 0 <= code && code < number_of_java_codes; }
public static boolean isFastCode (int code) { return number_of_java_codes <= code && code < number_of_codes; }
public static boolean isAload (int code) { return (code == _aload || code == _aload_0 || code == _aload_1
|| code == _aload_2 || code == _aload_3); }
public static boolean isAstore (int code) { return (code == _astore || code == _astore_0 || code == _astore_1
|| code == _astore_2 || code == _astore_3); }
public static boolean isZeroConst (int code) { return (code == _aconst_null || code == _iconst_0
|| code == _fconst_0 || code == _dconst_0); }
static int flags (int code, boolean is_wide) {
assert code == (code & 0xff) : "must be a byte";
return _flags[code + (is_wide ? 256 : 0)];
}
static int format_bits (int code, boolean is_wide) { return flags(code, is_wide) & _all_fmt_bits; }
static boolean has_all_flags (int code, int test_flags, boolean is_wide) {
return (flags(code, is_wide) & test_flags) == test_flags;
}
static char compute_flags(String format) {
return compute_flags(format, 0);
}
static char compute_flags(String format, int more_flags) {
if (format == null) return 0; // not even more_flags
int flags = more_flags;
int fp = 0;
if (format.length() == 0) {
flags |= _fmt_not_simple; // but variable
} else {
switch (format.charAt(fp)) {
case 'b':
flags |= _fmt_not_variable; // but simple
++fp; // skip 'b'
break;
case 'w':
flags |= _fmt_not_variable | _fmt_not_simple;
++fp; // skip 'w'
assert(format.charAt(fp) == 'b') : "wide format must start with 'wb'";
++fp; // skip 'b'
break;
}
}
boolean has_nbo = false, has_jbo = false;
int has_size = 0;
while (fp < format.length()) {
int this_flag = 0;
char fc = format.charAt(fp++);
switch (fc) {
case '_': continue; // ignore these
case 'j': this_flag = _fmt_has_j; has_jbo = true; break;
case 'k': this_flag = _fmt_has_k; has_jbo = true; break;
case 'i': this_flag = _fmt_has_i; has_jbo = true; break;
case 'c': this_flag = _fmt_has_c; has_jbo = true; break;
case 'o': this_flag = _fmt_has_o; has_jbo = true; break;
// uppercase versions mark native byte order (from Rewriter)
// actually, only the 'J' case happens currently
case 'J': this_flag = _fmt_has_j; has_nbo = true; break;
case 'K': this_flag = _fmt_has_k; has_nbo = true; break;
case 'I': this_flag = _fmt_has_i; has_nbo = true; break;
case 'C': this_flag = _fmt_has_c; has_nbo = true; break;
case 'O': this_flag = _fmt_has_o; has_nbo = true; break;
default: assert false : "bad char in format";
}
flags |= this_flag;
assert !(has_jbo && has_nbo) : "mixed byte orders in format";
if (has_nbo)
flags |= _fmt_has_nbo;
int this_size = 1;
if (fp < format.length() && format.charAt(fp) == fc) {
// advance beyond run of the same characters
this_size = 2;
while (fp + 1 < format.length() && format.charAt(++fp) == fc) this_size++;
switch (this_size) {
case 2: flags |= _fmt_has_u2; break;
case 4: flags |= _fmt_has_u4; break;
default: assert false : "bad rep count in format";
}
}
assert has_size == 0 || // no field yet
this_size == has_size || // same size
this_size < has_size && fp == format.length() : // last field can be short
"mixed field sizes in format";
has_size = this_size;
}
assert flags == (char)flags : "change _format_flags";
return (char)flags;
}
//----------------------------------------------------------------------
// Internals only below this point
//
private static String[] _name;
private static String[] _format;
private static String[] _wide_format;
private static int[] _result_type;
private static byte[] _depth;
private static byte[] _lengths;
private static int[] _java_code;
private static char[] _flags;
static {
_name = new String [number_of_codes];
_format = new String [number_of_codes];
_wide_format = new String [number_of_codes];
_result_type = new int [number_of_codes]; // See BasicType.java
_depth = new byte [number_of_codes];
_lengths = new byte [number_of_codes];
_java_code = new int [number_of_codes];
_flags = new char[256 * 2]; // all second page for wide formats
// In case we want to fetch this information from the VM in the
// future
VM.registerVMInitializedObserver(new Observer() {
public void update(Observable o, Object data) {
initialize();
}
});
}
private static final int jintSize = 4;
// private static String[] _name = new String [number_of_codes];
// private static String[] _format = new String [number_of_codes];
// private static String[] _wide_format = new String [number_of_codes];
// private static int[] _result_type = new int [number_of_codes]; // See BasicType.java
// private static byte[] _depth = new byte [number_of_codes];
// private static byte[] _length = new byte [number_of_codes];
// private static boolean[] _can_trap = new boolean[number_of_codes];
// private static int[] _java_code = new int [number_of_codes];
// private static boolean[] _can_rewrite = new boolean[number_of_codes];
// Initialization
private static void initialize() {
if (Assert.ASSERTS_ENABLED) {
Assert.that(number_of_codes <= 256, "too many bytecodes");
}
// Format strings interpretation:
//
// b: bytecode
// c: signed constant, Java byte-ordering
// i: unsigned index , Java byte-ordering
// j: unsigned index , native byte-ordering
// o: branch offset , Java byte-ordering
// _: unused/ignored
// w: wide bytecode
//
// Note: Right now the format strings are used for 2 purposes:
// 1. to specify the length of the bytecode
// (= number of characters in format string)
// 2. to specify the bytecode attributes
//
// The bytecode attributes are currently used only for bytecode tracing
// (see BytecodeTracer); thus if more specific format information is
// used, one would also have to adjust the bytecode tracer.
//
// Note: For bytecodes with variable length, the format string is the empty string.
// Note 1: null for the format string means the bytecode doesn't exist
// in that form.
//
// Note 2: The result type is T_ILLEGAL for bytecodes where the top of stack
// type after execution is not only determined by the bytecode itself.
// Java bytecodes
// bytecode bytecode name format wide f. result tp stk traps
def(_nop , "nop" , "b" , null , BasicType.getTVoid() , 0, false);
def(_aconst_null , "aconst_null" , "b" , null , BasicType.getTObject() , 1, false);
def(_iconst_m1 , "iconst_m1" , "b" , null , BasicType.getTInt() , 1, false);
def(_iconst_0 , "iconst_0" , "b" , null , BasicType.getTInt() , 1, false);
def(_iconst_1 , "iconst_1" , "b" , null , BasicType.getTInt() , 1, false);
def(_iconst_2 , "iconst_2" , "b" , null , BasicType.getTInt() , 1, false);
def(_iconst_3 , "iconst_3" , "b" , null , BasicType.getTInt() , 1, false);
def(_iconst_4 , "iconst_4" , "b" , null , BasicType.getTInt() , 1, false);
def(_iconst_5 , "iconst_5" , "b" , null , BasicType.getTInt() , 1, false);
def(_lconst_0 , "lconst_0" , "b" , null , BasicType.getTLong() , 2, false);
def(_lconst_1 , "lconst_1" , "b" , null , BasicType.getTLong() , 2, false);
def(_fconst_0 , "fconst_0" , "b" , null , BasicType.getTFloat() , 1, false);
def(_fconst_1 , "fconst_1" , "b" , null , BasicType.getTFloat() , 1, false);
def(_fconst_2 , "fconst_2" , "b" , null , BasicType.getTFloat() , 1, false);
def(_dconst_0 , "dconst_0" , "b" , null , BasicType.getTDouble() , 2, false);
def(_dconst_1 , "dconst_1" , "b" , null , BasicType.getTDouble() , 2, false);
def(_bipush , "bipush" , "bc" , null , BasicType.getTInt() , 1, false);
def(_sipush , "sipush" , "bcc" , null , BasicType.getTInt() , 1, false);
def(_ldc , "ldc" , "bk" , null , BasicType.getTIllegal(), 1, true );
def(_ldc_w , "ldc_w" , "bkk" , null , BasicType.getTIllegal(), 1, true );
def(_ldc2_w , "ldc2_w" , "bkk" , null , BasicType.getTIllegal(), 2, true );
def(_iload , "iload" , "bi" , "wbii" , BasicType.getTInt() , 1, false);
def(_lload , "lload" , "bi" , "wbii" , BasicType.getTLong() , 2, false);
def(_fload , "fload" , "bi" , "wbii" , BasicType.getTFloat() , 1, false);
def(_dload , "dload" , "bi" , "wbii" , BasicType.getTDouble() , 2, false);
def(_aload , "aload" , "bi" , "wbii" , BasicType.getTObject() , 1, false);
def(_iload_0 , "iload_0" , "b" , null , BasicType.getTInt() , 1, false);
def(_iload_1 , "iload_1" , "b" , null , BasicType.getTInt() , 1, false);
def(_iload_2 , "iload_2" , "b" , null , BasicType.getTInt() , 1, false);
def(_iload_3 , "iload_3" , "b" , null , BasicType.getTInt() , 1, false);
def(_lload_0 , "lload_0" , "b" , null , BasicType.getTLong() , 2, false);
def(_lload_1 , "lload_1" , "b" , null , BasicType.getTLong() , 2, false);
def(_lload_2 , "lload_2" , "b" , null , BasicType.getTLong() , 2, false);
def(_lload_3 , "lload_3" , "b" , null , BasicType.getTLong() , 2, false);
def(_fload_0 , "fload_0" , "b" , null , BasicType.getTFloat() , 1, false);
def(_fload_1 , "fload_1" , "b" , null , BasicType.getTFloat() , 1, false);
def(_fload_2 , "fload_2" , "b" , null , BasicType.getTFloat() , 1, false);
def(_fload_3 , "fload_3" , "b" , null , BasicType.getTFloat() , 1, false);
def(_dload_0 , "dload_0" , "b" , null , BasicType.getTDouble() , 2, false);
def(_dload_1 , "dload_1" , "b" , null , BasicType.getTDouble() , 2, false);
def(_dload_2 , "dload_2" , "b" , null , BasicType.getTDouble() , 2, false);
def(_dload_3 , "dload_3" , "b" , null , BasicType.getTDouble() , 2, false);
def(_aload_0 , "aload_0" , "b" , null , BasicType.getTObject() , 1, true ); // rewriting in interpreter
def(_aload_1 , "aload_1" , "b" , null , BasicType.getTObject() , 1, false);
def(_aload_2 , "aload_2" , "b" , null , BasicType.getTObject() , 1, false);
def(_aload_3 , "aload_3" , "b" , null , BasicType.getTObject() , 1, false);
def(_iaload , "iaload" , "b" , null , BasicType.getTInt() , -1, true );
def(_laload , "laload" , "b" , null , BasicType.getTLong() , 0, true );
def(_faload , "faload" , "b" , null , BasicType.getTFloat() , -1, true );
def(_daload , "daload" , "b" , null , BasicType.getTDouble() , 0, true );
def(_aaload , "aaload" , "b" , null , BasicType.getTObject() , -1, true );
def(_baload , "baload" , "b" , null , BasicType.getTInt() , -1, true );
def(_caload , "caload" , "b" , null , BasicType.getTInt() , -1, true );
def(_saload , "saload" , "b" , null , BasicType.getTInt() , -1, true );
def(_istore , "istore" , "bi" , "wbii" , BasicType.getTVoid() , -1, false);
def(_lstore , "lstore" , "bi" , "wbii" , BasicType.getTVoid() , -2, false);
def(_fstore , "fstore" , "bi" , "wbii" , BasicType.getTVoid() , -1, false);
def(_dstore , "dstore" , "bi" , "wbii" , BasicType.getTVoid() , -2, false);
def(_astore , "astore" , "bi" , "wbii" , BasicType.getTVoid() , -1, false);
def(_istore_0 , "istore_0" , "b" , null , BasicType.getTVoid() , -1, false);
def(_istore_1 , "istore_1" , "b" , null , BasicType.getTVoid() , -1, false);
def(_istore_2 , "istore_2" , "b" , null , BasicType.getTVoid() , -1, false);
def(_istore_3 , "istore_3" , "b" , null , BasicType.getTVoid() , -1, false);
def(_lstore_0 , "lstore_0" , "b" , null , BasicType.getTVoid() , -2, false);
def(_lstore_1 , "lstore_1" , "b" , null , BasicType.getTVoid() , -2, false);
def(_lstore_2 , "lstore_2" , "b" , null , BasicType.getTVoid() , -2, false);
def(_lstore_3 , "lstore_3" , "b" , null , BasicType.getTVoid() , -2, false);
def(_fstore_0 , "fstore_0" , "b" , null , BasicType.getTVoid() , -1, false);
def(_fstore_1 , "fstore_1" , "b" , null , BasicType.getTVoid() , -1, false);
def(_fstore_2 , "fstore_2" , "b" , null , BasicType.getTVoid() , -1, false);
def(_fstore_3 , "fstore_3" , "b" , null , BasicType.getTVoid() , -1, false);
def(_dstore_0 , "dstore_0" , "b" , null , BasicType.getTVoid() , -2, false);
def(_dstore_1 , "dstore_1" , "b" , null , BasicType.getTVoid() , -2, false);
def(_dstore_2 , "dstore_2" , "b" , null , BasicType.getTVoid() , -2, false);
def(_dstore_3 , "dstore_3" , "b" , null , BasicType.getTVoid() , -2, false);
def(_astore_0 , "astore_0" , "b" , null , BasicType.getTVoid() , -1, false);
def(_astore_1 , "astore_1" , "b" , null , BasicType.getTVoid() , -1, false);
def(_astore_2 , "astore_2" , "b" , null , BasicType.getTVoid() , -1, false);
def(_astore_3 , "astore_3" , "b" , null , BasicType.getTVoid() , -1, false);
def(_iastore , "iastore" , "b" , null , BasicType.getTVoid() , -3, true );
def(_lastore , "lastore" , "b" , null , BasicType.getTVoid() , -4, true );
def(_fastore , "fastore" , "b" , null , BasicType.getTVoid() , -3, true );
def(_dastore , "dastore" , "b" , null , BasicType.getTVoid() , -4, true );
def(_aastore , "aastore" , "b" , null , BasicType.getTVoid() , -3, true );
def(_bastore , "bastore" , "b" , null , BasicType.getTVoid() , -3, true );
def(_castore , "castore" , "b" , null , BasicType.getTVoid() , -3, true );
def(_sastore , "sastore" , "b" , null , BasicType.getTVoid() , -3, true );
def(_pop , "pop" , "b" , null , BasicType.getTVoid() , -1, false);
def(_pop2 , "pop2" , "b" , null , BasicType.getTVoid() , -2, false);
def(_dup , "dup" , "b" , null , BasicType.getTVoid() , 1, false);
def(_dup_x1 , "dup_x1" , "b" , null , BasicType.getTVoid() , 1, false);
def(_dup_x2 , "dup_x2" , "b" , null , BasicType.getTVoid() , 1, false);
def(_dup2 , "dup2" , "b" , null , BasicType.getTVoid() , 2, false);
def(_dup2_x1 , "dup2_x1" , "b" , null , BasicType.getTVoid() , 2, false);
def(_dup2_x2 , "dup2_x2" , "b" , null , BasicType.getTVoid() , 2, false);
def(_swap , "swap" , "b" , null , BasicType.getTVoid() , 0, false);
def(_iadd , "iadd" , "b" , null , BasicType.getTInt() , -1, false);
def(_ladd , "ladd" , "b" , null , BasicType.getTLong() , -2, false);
def(_fadd , "fadd" , "b" , null , BasicType.getTFloat() , -1, false);
def(_dadd , "dadd" , "b" , null , BasicType.getTDouble() , -2, false);
def(_isub , "isub" , "b" , null , BasicType.getTInt() , -1, false);
def(_lsub , "lsub" , "b" , null , BasicType.getTLong() , -2, false);
def(_fsub , "fsub" , "b" , null , BasicType.getTFloat() , -1, false);
def(_dsub , "dsub" , "b" , null , BasicType.getTDouble() , -2, false);
def(_imul , "imul" , "b" , null , BasicType.getTInt() , -1, false);
def(_lmul , "lmul" , "b" , null , BasicType.getTLong() , -2, false);
def(_fmul , "fmul" , "b" , null , BasicType.getTFloat() , -1, false);
def(_dmul , "dmul" , "b" , null , BasicType.getTDouble() , -2, false);
def(_idiv , "idiv" , "b" , null , BasicType.getTInt() , -1, true );
def(_ldiv , "ldiv" , "b" , null , BasicType.getTLong() , -2, true );
def(_fdiv , "fdiv" , "b" , null , BasicType.getTFloat() , -1, false);
def(_ddiv , "ddiv" , "b" , null , BasicType.getTDouble() , -2, false);
def(_irem , "irem" , "b" , null , BasicType.getTInt() , -1, true );
def(_lrem , "lrem" , "b" , null , BasicType.getTLong() , -2, true );
def(_frem , "frem" , "b" , null , BasicType.getTFloat() , -1, false);
def(_drem , "drem" , "b" , null , BasicType.getTDouble() , -2, false);
def(_ineg , "ineg" , "b" , null , BasicType.getTInt() , 0, false);
def(_lneg , "lneg" , "b" , null , BasicType.getTLong() , 0, false);
def(_fneg , "fneg" , "b" , null , BasicType.getTFloat() , 0, false);
def(_dneg , "dneg" , "b" , null , BasicType.getTDouble() , 0, false);
def(_ishl , "ishl" , "b" , null , BasicType.getTInt() , -1, false);
def(_lshl , "lshl" , "b" , null , BasicType.getTLong() , -1, false);
def(_ishr , "ishr" , "b" , null , BasicType.getTInt() , -1, false);
def(_lshr , "lshr" , "b" , null , BasicType.getTLong() , -1, false);
def(_iushr , "iushr" , "b" , null , BasicType.getTInt() , -1, false);
def(_lushr , "lushr" , "b" , null , BasicType.getTLong() , -1, false);
def(_iand , "iand" , "b" , null , BasicType.getTInt() , -1, false);
def(_land , "land" , "b" , null , BasicType.getTLong() , -2, false);
def(_ior , "ior" , "b" , null , BasicType.getTInt() , -1, false);
def(_lor , "lor" , "b" , null , BasicType.getTLong() , -2, false);
def(_ixor , "ixor" , "b" , null , BasicType.getTInt() , -1, false);
def(_lxor , "lxor" , "b" , null , BasicType.getTLong() , -2, false);
def(_iinc , "iinc" , "bic" , "wbiicc", BasicType.getTVoid() , 0, false);
def(_i2l , "i2l" , "b" , null , BasicType.getTLong() , 1, false);
def(_i2f , "i2f" , "b" , null , BasicType.getTFloat() , 0, false);
def(_i2d , "i2d" , "b" , null , BasicType.getTDouble() , 1, false);
def(_l2i , "l2i" , "b" , null , BasicType.getTInt() , -1, false);
def(_l2f , "l2f" , "b" , null , BasicType.getTFloat() , -1, false);
def(_l2d , "l2d" , "b" , null , BasicType.getTDouble() , 0, false);
def(_f2i , "f2i" , "b" , null , BasicType.getTInt() , 0, false);
def(_f2l , "f2l" , "b" , null , BasicType.getTLong() , 1, false);
def(_f2d , "f2d" , "b" , null , BasicType.getTDouble() , 1, false);
def(_d2i , "d2i" , "b" , null , BasicType.getTInt() , -1, false);
def(_d2l , "d2l" , "b" , null , BasicType.getTLong() , 0, false);
def(_d2f , "d2f" , "b" , null , BasicType.getTFloat() , -1, false);
def(_i2b , "i2b" , "b" , null , BasicType.getTByte() , 0, false);
def(_i2c , "i2c" , "b" , null , BasicType.getTChar() , 0, false);
def(_i2s , "i2s" , "b" , null , BasicType.getTShort() , 0, false);
def(_lcmp , "lcmp" , "b" , null , BasicType.getTVoid() , -3, false);
def(_fcmpl , "fcmpl" , "b" , null , BasicType.getTVoid() , -1, false);
def(_fcmpg , "fcmpg" , "b" , null , BasicType.getTVoid() , -1, false);
def(_dcmpl , "dcmpl" , "b" , null , BasicType.getTVoid() , -3, false);
def(_dcmpg , "dcmpg" , "b" , null , BasicType.getTVoid() , -3, false);
def(_ifeq , "ifeq" , "boo" , null , BasicType.getTVoid() , -1, false);
def(_ifne , "ifne" , "boo" , null , BasicType.getTVoid() , -1, false);
def(_iflt , "iflt" , "boo" , null , BasicType.getTVoid() , -1, false);
def(_ifge , "ifge" , "boo" , null , BasicType.getTVoid() , -1, false);
def(_ifgt , "ifgt" , "boo" , null , BasicType.getTVoid() , -1, false);
def(_ifle , "ifle" , "boo" , null , BasicType.getTVoid() , -1, false);
def(_if_icmpeq , "if_icmpeq" , "boo" , null , BasicType.getTVoid() , -2, false);
def(_if_icmpne , "if_icmpne" , "boo" , null , BasicType.getTVoid() , -2, false);
def(_if_icmplt , "if_icmplt" , "boo" , null , BasicType.getTVoid() , -2, false);
def(_if_icmpge , "if_icmpge" , "boo" , null , BasicType.getTVoid() , -2, false);
def(_if_icmpgt , "if_icmpgt" , "boo" , null , BasicType.getTVoid() , -2, false);
def(_if_icmple , "if_icmple" , "boo" , null , BasicType.getTVoid() , -2, false);
def(_if_acmpeq , "if_acmpeq" , "boo" , null , BasicType.getTVoid() , -2, false);
def(_if_acmpne , "if_acmpne" , "boo" , null , BasicType.getTVoid() , -2, false);
def(_goto , "goto" , "boo" , null , BasicType.getTVoid() , 0, false);
def(_jsr , "jsr" , "boo" , null , BasicType.getTInt() , 0, false);
def(_ret , "ret" , "bi" , "wbii" , BasicType.getTVoid() , 0, false);
def(_tableswitch , "tableswitch" , "" , null , BasicType.getTVoid() , -1, false); // may have backward branches
def(_lookupswitch , "lookupswitch" , "" , null , BasicType.getTVoid() , -1, false); // rewriting in interpreter
def(_ireturn , "ireturn" , "b" , null , BasicType.getTInt() , -1, true );
def(_lreturn , "lreturn" , "b" , null , BasicType.getTLong() , -2, true );
def(_freturn , "freturn" , "b" , null , BasicType.getTFloat() , -1, true );
def(_dreturn , "dreturn" , "b" , null , BasicType.getTDouble() , -2, true );
def(_areturn , "areturn" , "b" , null , BasicType.getTObject() , -1, true );
def(_return , "return" , "b" , null , BasicType.getTVoid() , 0, true );
def(_getstatic , "getstatic" , "bJJ" , null , BasicType.getTIllegal(), 1, true );
def(_putstatic , "putstatic" , "bJJ" , null , BasicType.getTIllegal(), -1, true );
def(_getfield , "getfield" , "bJJ" , null , BasicType.getTIllegal(), 0, true );
def(_putfield , "putfield" , "bJJ" , null , BasicType.getTIllegal(), -2, true );
def(_invokevirtual , "invokevirtual" , "bJJ" , null , BasicType.getTIllegal(), -1, true );
def(_invokespecial , "invokespecial" , "bJJ" , null , BasicType.getTIllegal(), -1, true );
def(_invokestatic , "invokestatic" , "bJJ" , null , BasicType.getTIllegal(), 0, true );
def(_invokeinterface , "invokeinterface" , "bJJ__", null , BasicType.getTIllegal(), -1, true );
def(_invokedynamic , "invokedynamic" , "bJJJJ", null , BasicType.getTIllegal(), 0, true );
def(_new , "new" , "bkk" , null , BasicType.getTObject() , 1, true );
def(_newarray , "newarray" , "bc" , null , BasicType.getTObject() , 0, true );
def(_anewarray , "anewarray" , "bkk" , null , BasicType.getTObject() , 0, true );
def(_arraylength , "arraylength" , "b" , null , BasicType.getTVoid() , 0, true );
def(_athrow , "athrow" , "b" , null , BasicType.getTVoid() , -1, true );
def(_checkcast , "checkcast" , "bkk" , null , BasicType.getTObject() , 0, true );
def(_instanceof , "instanceof" , "bkk" , null , BasicType.getTInt() , 0, true );
def(_monitorenter , "monitorenter" , "b" , null , BasicType.getTVoid() , -1, true );
def(_monitorexit , "monitorexit" , "b" , null , BasicType.getTVoid() , -1, true );
def(_wide , "wide" , "" , null , BasicType.getTVoid() , 0, false);
def(_multianewarray , "multianewarray" , "bkkc" , null , BasicType.getTObject() , 1, true );
def(_ifnull , "ifnull" , "boo" , null , BasicType.getTVoid() , -1, false);
def(_ifnonnull , "ifnonnull" , "boo" , null , BasicType.getTVoid() , -1, false);
def(_goto_w , "goto_w" , "boooo", null , BasicType.getTVoid() , 0, false);
def(_jsr_w , "jsr_w" , "boooo", null , BasicType.getTInt() , 0, false);
def(_breakpoint , "breakpoint" , "" , null , BasicType.getTVoid() , 0, true );
// JVM bytecodes
// bytecode bytecode name format wide f. result tp stk traps std code
def(_fast_agetfield , "fast_agetfield" , "bJJ" , null , BasicType.getTObject() , 0, true , _getfield );
def(_fast_bgetfield , "fast_bgetfield" , "bJJ" , null , BasicType.getTInt() , 0, true , _getfield );
def(_fast_cgetfield , "fast_cgetfield" , "bJJ" , null , BasicType.getTChar() , 0, true , _getfield );
def(_fast_dgetfield , "fast_dgetfield" , "bJJ" , null , BasicType.getTDouble() , 0, true , _getfield );
def(_fast_fgetfield , "fast_fgetfield" , "bJJ" , null , BasicType.getTFloat() , 0, true , _getfield );
def(_fast_igetfield , "fast_igetfield" , "bJJ" , null , BasicType.getTInt() , 0, true , _getfield );
def(_fast_lgetfield , "fast_lgetfield" , "bJJ" , null , BasicType.getTLong() , 0, true , _getfield );
def(_fast_sgetfield , "fast_sgetfield" , "bJJ" , null , BasicType.getTShort() , 0, true , _getfield );
def(_fast_aputfield , "fast_aputfield" , "bJJ" , null , BasicType.getTObject() , 0, true , _putfield );
def(_fast_bputfield , "fast_bputfield" , "bJJ" , null , BasicType.getTInt() , 0, true , _putfield );
def(_fast_zputfield , "fast_zputfield" , "bJJ" , null , BasicType.getTInt() , 0, true , _putfield );
def(_fast_cputfield , "fast_cputfield" , "bJJ" , null , BasicType.getTChar() , 0, true , _putfield );
def(_fast_dputfield , "fast_dputfield" , "bJJ" , null , BasicType.getTDouble() , 0, true , _putfield );
def(_fast_fputfield , "fast_fputfield" , "bJJ" , null , BasicType.getTFloat() , 0, true , _putfield );
def(_fast_iputfield , "fast_iputfield" , "bJJ" , null , BasicType.getTInt() , 0, true , _putfield );
def(_fast_lputfield , "fast_lputfield" , "bJJ" , null , BasicType.getTLong() , 0, true , _putfield );
def(_fast_sputfield , "fast_sputfield" , "bJJ" , null , BasicType.getTShort() , 0, true , _putfield );
def(_fast_aload_0 , "fast_aload_0" , "b" , null , BasicType.getTObject() , 1, true , _aload_0 );
def(_fast_iaccess_0 , "fast_iaccess_0" , "b_JJ" , null , BasicType.getTInt() , 1, true , _aload_0 );
def(_fast_aaccess_0 , "fast_aaccess_0" , "b_JJ" , null , BasicType.getTObject() , 1, true , _aload_0 );
def(_fast_faccess_0 , "fast_faccess_0" , "b_JJ" , null , BasicType.getTObject() , 1, true , _aload_0 );
def(_fast_iload , "fast_iload" , "bi" , null , BasicType.getTInt() , 1, false, _iload );
def(_fast_iload2 , "fast_iload2" , "bi_i" , null , BasicType.getTInt() , 2, false, _iload );
def(_fast_icaload , "fast_icaload" , "bi_" , null , BasicType.getTInt() , 0, false, _iload );
// Faster method invocation.
def(_fast_invokevfinal , "fast_invokevfinal" , "bJJ" , null , BasicType.getTIllegal(), -1, true, _invokevirtual );
def(_fast_linearswitch , "fast_linearswitch" , "" , null , BasicType.getTVoid() , -1, false, _lookupswitch );
def(_fast_binaryswitch , "fast_binaryswitch" , "" , null , BasicType.getTVoid() , -1, false, _lookupswitch );
def(_fast_aldc , "fast_aldc" , "bj" , null , BasicType.getTObject(), 1, true, _ldc );
def(_fast_aldc_w , "fast_aldc_w" , "bJJ" , null , BasicType.getTObject(), 1, true, _ldc_w );
def(_return_register_finalizer, "return_register_finalizer", "b" , null , BasicType.getTVoid() , 0, true, _return );
// special handling of signature-polymorphic methods
def(_invokehandle , "invokehandle" , "bJJ" , null , BasicType.getTIllegal(), -1, true, _invokevirtual );
// CDS specific. Bytecodes rewritten at CDS dump time
def(_nofast_getfield , "_nofast_getfield" , "bJJ" , null , BasicType.getTIllegal() , 0, true, _getfield );
def(_nofast_putfield , "_nofast_putfield" , "bJJ" , null , BasicType.getTIllegal() ,-2, true, _putfield );
def(_nofast_aload_0 , "_nofast_aload_0" , "b" , null , BasicType.getTIllegal() , 1, true, _aload_0 );
def(_nofast_iload , "_nofast_iload" , "bi" , null , BasicType.getTIllegal() , 1, false, _iload );
def(_shouldnotreachhere , "_shouldnotreachhere" , "b" , null , BasicType.getTVoid() , 0, false);
if (Assert.ASSERTS_ENABLED) {
// compare can_trap information for each bytecode with the
// can_trap information for the corresponding base bytecode
// (if a rewritten bytecode can trap, so must the base bytecode)
for (int i = 0; i < number_of_codes; i++) {
if (isDefined(i)) {
int j = javaCode(i);
if (canTrap(i) && !canTrap(j)) {
Assert.that(false, name(i) + " can trap => " + name(j) + " can trap, too");
}
}
}
}
}
private static void def(int code, String name, String format, String wide_format, int result_type, int depth, boolean can_trap) {
def(code, name, format, wide_format, result_type, depth, can_trap, code);
}
private static void def(int code, String name, String format, String wide_format, int result_type, int depth, boolean can_trap, int java_code) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(wide_format == null || format != null, "short form must exist if there's a wide form");
}
int len = (format != null ? format.length() : 0);
int wlen = (wide_format != null ? wide_format.length() : 0);
_name [code] = name;
_result_type [code] = result_type;
_depth [code] = (byte) depth;
_lengths [code] = (byte)((wlen << 4) | (len & 0xF));
_java_code [code] = java_code;
_format [code] = format;
_wide_format [code] = wide_format;
int bc_flags = 0;
if (can_trap) bc_flags |= _bc_can_trap;
if (java_code != code) bc_flags |= _bc_can_rewrite;
_flags[code+0*256] = compute_flags(format, bc_flags);
_flags[code+1*256] = compute_flags(wide_format, bc_flags);
}
}