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#ifndef SHARE_INTERPRETER_BYTECODES_HPP
#define SHARE_INTERPRETER_BYTECODES_HPP
#include "memory/allStatic.hpp"
#include "utilities/globalDefinitions.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] & 0 xF : -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); }
static int length_at (Method* method, address bcp) { return length_for_code_at(code_at(method, bcp), bcp); }
static int java_length_at (Method* method, address bcp) { return length_for_code_at(java_code_at(method, bcp), bcp); }
static bool is_java_code (Code code) { return 0 <= code && code < number_of_java_codes; }
static bool is_store_into_local(Code code){ return (_istore <= code && code <= _astore_3); }
static bool is_const (Code code) { return (_aconst_null <= code && code <= _ldc2_w); }
static bool is_zero_const (Code code) { return (code == _aconst_null || code == _iconst_0
|| code == _fconst_0 || code == _dconst_0); }
static bool is_return (Code code) { return (_ireturn <= code && code <= _return ); }
static bool is_invoke (Code code) { return (_invokevirtual <= code && code <= _invokedynamic); }
static bool has_receiver (Code code) { assert(is_invoke(code), "" ); return code == _invokevirtual ||
code == _invokespecial ||
code == _invokeinterface; }
static bool has_optional_appendix(Code code) { return code == _invokedynamic || code == _invokehandle; }
static int compute_flags (const char * format, int more_flags = 0 ); // compute the flags
static int flags (int code, bool is_wide) {
assert(code == (u_char)code, "must be a byte" );
return _flags[code + (is_wide ? (1 <<BitsPerByte) : 0 )];
}
static bool has_all_flags (Code code, int test_flags, bool is_wide) {
return (flags(code, is_wide) & test_flags) == test_flags;
}
// Initialization
static void initialize ();
};
#endif // SHARE_INTERPRETER_BYTECODES_HPP
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