JDK14/Java14源码在线阅读
/*
* Copyright (c) 1997, 2019, 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.
*
*/
#ifndef SHARE_INTERPRETER_BYTECODES_HPP
#define SHARE_INTERPRETER_BYTECODES_HPP
#include "memory/allocation.hpp"
// Bytecodes specifies all bytecodes used in the VM and
// provides utility functions to get bytecode attributes.
class Method;
// NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/interpreter/Bytecodes.java
class Bytecodes: AllStatic {
public:
enum Code {
_illegal = -1,
// Java bytecodes
_nop = 0, // 0x00
_aconst_null = 1, // 0x01
_iconst_m1 = 2, // 0x02
_iconst_0 = 3, // 0x03
_iconst_1 = 4, // 0x04
_iconst_2 = 5, // 0x05
_iconst_3 = 6, // 0x06
_iconst_4 = 7, // 0x07
_iconst_5 = 8, // 0x08
_lconst_0 = 9, // 0x09
_lconst_1 = 10, // 0x0a
_fconst_0 = 11, // 0x0b
_fconst_1 = 12, // 0x0c
_fconst_2 = 13, // 0x0d
_dconst_0 = 14, // 0x0e
_dconst_1 = 15, // 0x0f
_bipush = 16, // 0x10
_sipush = 17, // 0x11
_ldc = 18, // 0x12
_ldc_w = 19, // 0x13
_ldc2_w = 20, // 0x14
_iload = 21, // 0x15
_lload = 22, // 0x16
_fload = 23, // 0x17
_dload = 24, // 0x18
_aload = 25, // 0x19
_iload_0 = 26, // 0x1a
_iload_1 = 27, // 0x1b
_iload_2 = 28, // 0x1c
_iload_3 = 29, // 0x1d
_lload_0 = 30, // 0x1e
_lload_1 = 31, // 0x1f
_lload_2 = 32, // 0x20
_lload_3 = 33, // 0x21
_fload_0 = 34, // 0x22
_fload_1 = 35, // 0x23
_fload_2 = 36, // 0x24
_fload_3 = 37, // 0x25
_dload_0 = 38, // 0x26
_dload_1 = 39, // 0x27
_dload_2 = 40, // 0x28
_dload_3 = 41, // 0x29
_aload_0 = 42, // 0x2a
_aload_1 = 43, // 0x2b
_aload_2 = 44, // 0x2c
_aload_3 = 45, // 0x2d
_iaload = 46, // 0x2e
_laload = 47, // 0x2f
_faload = 48, // 0x30
_daload = 49, // 0x31
_aaload = 50, // 0x32
_baload = 51, // 0x33
_caload = 52, // 0x34
_saload = 53, // 0x35
_istore = 54, // 0x36
_lstore = 55, // 0x37
_fstore = 56, // 0x38
_dstore = 57, // 0x39
_astore = 58, // 0x3a
_istore_0 = 59, // 0x3b
_istore_1 = 60, // 0x3c
_istore_2 = 61, // 0x3d
_istore_3 = 62, // 0x3e
_lstore_0 = 63, // 0x3f
_lstore_1 = 64, // 0x40
_lstore_2 = 65, // 0x41
_lstore_3 = 66, // 0x42
_fstore_0 = 67, // 0x43
_fstore_1 = 68, // 0x44
_fstore_2 = 69, // 0x45
_fstore_3 = 70, // 0x46
_dstore_0 = 71, // 0x47
_dstore_1 = 72, // 0x48
_dstore_2 = 73, // 0x49
_dstore_3 = 74, // 0x4a
_astore_0 = 75, // 0x4b
_astore_1 = 76, // 0x4c
_astore_2 = 77, // 0x4d
_astore_3 = 78, // 0x4e
_iastore = 79, // 0x4f
_lastore = 80, // 0x50
_fastore = 81, // 0x51
_dastore = 82, // 0x52
_aastore = 83, // 0x53
_bastore = 84, // 0x54
_castore = 85, // 0x55
_sastore = 86, // 0x56
_pop = 87, // 0x57
_pop2 = 88, // 0x58
_dup = 89, // 0x59
_dup_x1 = 90, // 0x5a
_dup_x2 = 91, // 0x5b
_dup2 = 92, // 0x5c
_dup2_x1 = 93, // 0x5d
_dup2_x2 = 94, // 0x5e
_swap = 95, // 0x5f
_iadd = 96, // 0x60
_ladd = 97, // 0x61
_fadd = 98, // 0x62
_dadd = 99, // 0x63
_isub = 100, // 0x64
_lsub = 101, // 0x65
_fsub = 102, // 0x66
_dsub = 103, // 0x67
_imul = 104, // 0x68
_lmul = 105, // 0x69
_fmul = 106, // 0x6a
_dmul = 107, // 0x6b
_idiv = 108, // 0x6c
_ldiv = 109, // 0x6d
_fdiv = 110, // 0x6e
_ddiv = 111, // 0x6f
_irem = 112, // 0x70
_lrem = 113, // 0x71
_frem = 114, // 0x72
_drem = 115, // 0x73
_ineg = 116, // 0x74
_lneg = 117, // 0x75
_fneg = 118, // 0x76
_dneg = 119, // 0x77
_ishl = 120, // 0x78
_lshl = 121, // 0x79
_ishr = 122, // 0x7a
_lshr = 123, // 0x7b
_iushr = 124, // 0x7c
_lushr = 125, // 0x7d
_iand = 126, // 0x7e
_land = 127, // 0x7f
_ior = 128, // 0x80
_lor = 129, // 0x81
_ixor = 130, // 0x82
_lxor = 131, // 0x83
_iinc = 132, // 0x84
_i2l = 133, // 0x85
_i2f = 134, // 0x86
_i2d = 135, // 0x87
_l2i = 136, // 0x88
_l2f = 137, // 0x89
_l2d = 138, // 0x8a
_f2i = 139, // 0x8b
_f2l = 140, // 0x8c
_f2d = 141, // 0x8d
_d2i = 142, // 0x8e
_d2l = 143, // 0x8f
_d2f = 144, // 0x90
_i2b = 145, // 0x91
_i2c = 146, // 0x92
_i2s = 147, // 0x93
_lcmp = 148, // 0x94
_fcmpl = 149, // 0x95
_fcmpg = 150, // 0x96
_dcmpl = 151, // 0x97
_dcmpg = 152, // 0x98
_ifeq = 153, // 0x99
_ifne = 154, // 0x9a
_iflt = 155, // 0x9b
_ifge = 156, // 0x9c
_ifgt = 157, // 0x9d
_ifle = 158, // 0x9e
_if_icmpeq = 159, // 0x9f
_if_icmpne = 160, // 0xa0
_if_icmplt = 161, // 0xa1
_if_icmpge = 162, // 0xa2
_if_icmpgt = 163, // 0xa3
_if_icmple = 164, // 0xa4
_if_acmpeq = 165, // 0xa5
_if_acmpne = 166, // 0xa6
_goto = 167, // 0xa7
_jsr = 168, // 0xa8
_ret = 169, // 0xa9
_tableswitch = 170, // 0xaa
_lookupswitch = 171, // 0xab
_ireturn = 172, // 0xac
_lreturn = 173, // 0xad
_freturn = 174, // 0xae
_dreturn = 175, // 0xaf
_areturn = 176, // 0xb0
_return = 177, // 0xb1
_getstatic = 178, // 0xb2
_putstatic = 179, // 0xb3
_getfield = 180, // 0xb4
_putfield = 181, // 0xb5
_invokevirtual = 182, // 0xb6
_invokespecial = 183, // 0xb7
_invokestatic = 184, // 0xb8
_invokeinterface = 185, // 0xb9
_invokedynamic = 186, // 0xba
_new = 187, // 0xbb
_newarray = 188, // 0xbc
_anewarray = 189, // 0xbd
_arraylength = 190, // 0xbe
_athrow = 191, // 0xbf
_checkcast = 192, // 0xc0
_instanceof = 193, // 0xc1
_monitorenter = 194, // 0xc2
_monitorexit = 195, // 0xc3
_wide = 196, // 0xc4
_multianewarray = 197, // 0xc5
_ifnull = 198, // 0xc6
_ifnonnull = 199, // 0xc7
_goto_w = 200, // 0xc8
_jsr_w = 201, // 0xc9
_breakpoint = 202, // 0xca
number_of_java_codes,
// JVM bytecodes
_fast_agetfield = number_of_java_codes,
_fast_bgetfield ,
_fast_cgetfield ,
_fast_dgetfield ,
_fast_fgetfield ,
_fast_igetfield ,
_fast_lgetfield ,
_fast_sgetfield ,
_fast_aputfield ,
_fast_bputfield ,
_fast_zputfield ,
_fast_cputfield ,
_fast_dputfield ,
_fast_fputfield ,
_fast_iputfield ,
_fast_lputfield ,
_fast_sputfield ,
_fast_aload_0 ,
_fast_iaccess_0 ,
_fast_aaccess_0 ,
_fast_faccess_0 ,
_fast_iload ,
_fast_iload2 ,
_fast_icaload ,
_fast_invokevfinal ,
_fast_linearswitch ,
_fast_binaryswitch ,
// special handling of oop constants:
_fast_aldc ,
_fast_aldc_w ,
_return_register_finalizer ,
// special handling of signature-polymorphic methods:
_invokehandle ,
// These bytecodes are rewritten at CDS dump time, so that we can prevent them from being
// rewritten at run time. This way, the ConstMethods can be placed in the CDS ReadOnly
// section, and RewriteByteCodes/RewriteFrequentPairs can rewrite non-CDS bytecodes
// at run time.
//
// Rewritten at CDS dump time to | Original bytecode
// _invoke_virtual rewritten on sparc, will be disabled if UseSharedSpaces turned on.
// ------------------------------+------------------
_nofast_getfield , // <- _getfield
_nofast_putfield , // <- _putfield
_nofast_aload_0 , // <- _aload_0
_nofast_iload , // <- _iload
_shouldnotreachhere , // For debugging
number_of_codes
};
// Flag bits derived from format strings, can_trap, can_rewrite, etc.:
enum Flags {
// semantic flags:
_bc_can_trap = 1<<0, // bytecode execution can trap or block
_bc_can_rewrite = 1<<1, // bytecode execution has an alternate form
// format bits (determined only by the format string):
_fmt_has_c = 1<<2, // constant, such as sipush "bcc"
_fmt_has_j = 1<<3, // constant pool cache index, such as getfield "bjj"
_fmt_has_k = 1<<4, // constant pool index, such as ldc "bk"
_fmt_has_i = 1<<5, // local index, such as iload
_fmt_has_o = 1<<6, // offset, such as ifeq
_fmt_has_nbo = 1<<7, // contains native-order field(s)
_fmt_has_u2 = 1<<8, // contains double-byte field(s)
_fmt_has_u4 = 1<<9, // contains quad-byte field
_fmt_not_variable = 1<<10, // not of variable length (simple or wide)
_fmt_not_simple = 1<<11, // either wide or variable length
_all_fmt_bits = (_fmt_not_simple*2 - _fmt_has_c),
// Example derived format syndromes:
_fmt_b = _fmt_not_variable,
_fmt_bc = _fmt_b | _fmt_has_c,
_fmt_bi = _fmt_b | _fmt_has_i,
_fmt_bkk = _fmt_b | _fmt_has_k | _fmt_has_u2,
_fmt_bJJ = _fmt_b | _fmt_has_j | _fmt_has_u2 | _fmt_has_nbo,
_fmt_bo2 = _fmt_b | _fmt_has_o | _fmt_has_u2,
_fmt_bo4 = _fmt_b | _fmt_has_o | _fmt_has_u4
};
private:
static bool _is_initialized;
static const char* _name [number_of_codes];
static BasicType _result_type [number_of_codes];
static s_char _depth [number_of_codes];
static u_char _lengths [number_of_codes];
static Code _java_code [number_of_codes];
static jchar _flags [(1<<BitsPerByte)*2]; // all second page for wide formats
static void def(Code code, const char* name, const char* format, const char* wide_format, BasicType result_type, int depth, bool can_trap);
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);
// Verify that bcp points into method
#ifdef ASSERT
static bool check_method(const Method* method, address bcp);
#endif
static bool check_must_rewrite(Bytecodes::Code bc);
public:
// Conversion
static void check (Code code) { assert(is_defined(code), "illegal code: %d", (int)code); }
static void wide_check (Code code) { assert(wide_is_defined(code), "illegal code: %d", (int)code); }
static Code cast (int code) { return (Code)code; }
// Fetch a bytecode, hiding breakpoints as necessary. The method
// argument is used for conversion of breakpoints into the original
// bytecode. The CI uses these methods but guarantees that
// breakpoints are hidden so the method argument should be passed as
// NULL since in that case the bcp and Method* are unrelated
// memory.
static Code code_at(const Method* method, address bcp) {
assert(method == NULL || check_method(method, bcp), "bcp must point into method");
Code code = cast(*bcp);
assert(code != _breakpoint || method != NULL, "need Method* to decode breakpoint");
return (code != _breakpoint) ? code : non_breakpoint_code_at(method, bcp);
}
static Code java_code_at(const Method* method, address bcp) {
return java_code(code_at(method, bcp));
}
// Fetch a bytecode or a breakpoint:
static Code code_or_bp_at(address bcp) { return (Code)cast(*bcp); }
static Code code_at(Method* method, int bci);
// find a bytecode, behind a breakpoint if necessary:
static Code non_breakpoint_code_at(const Method* method, address bcp);
// Bytecode attributes
static bool is_valid (int code) { return 0 <= code && code < number_of_codes; }
static bool is_defined (int code) { return is_valid(code) && flags(code, false) != 0; }
static bool wide_is_defined(int code) { return is_defined(code) && flags(code, true) != 0; }
static const char* name (Code code) { check(code); return _name [code]; }
static BasicType result_type (Code code) { check(code); return _result_type [code]; }
static int depth (Code code) { check(code); return _depth [code]; }
// Note: Length functions must return <=0 for invalid bytecodes.
// Calling check(code) in length functions would throw an unwanted assert.
static int length_for (Code code) { return is_valid(code) ? _lengths[code] & 0xF : -1; }
static int wide_length_for(Code code) { return is_valid(code) ? _lengths[code] >> 4 : -1; }
static bool can_trap (Code code) { check(code); return has_all_flags(code, _bc_can_trap, false); }
static Code java_code (Code code) { check(code); return _java_code [code]; }
static bool can_rewrite (Code code) { check(code); return has_all_flags(code, _bc_can_rewrite, false); }
static bool must_rewrite(Bytecodes::Code code) { return can_rewrite(code) && check_must_rewrite(code); }
static bool native_byte_order(Code code) { check(code); return has_all_flags(code, _fmt_has_nbo, false); }
static bool uses_cp_cache (Code code) { check(code); return has_all_flags(code, _fmt_has_j, false); }
// if 'end' is provided, it indicates the end of the code buffer which
// should not be read past when parsing.
static int special_length_at(Bytecodes::Code code, address bcp, address end = NULL);
static int raw_special_length_at(address bcp, address end = NULL);
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); }
/**代码未完, 请加载全部代码(NowJava.com).**/
关注时代Java
关注时代Java