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src/hotspot/share/interpreter/bytecodes.hpp
440 строк
19 KB
Matias Saavedra Silva
8301996: Move field resolution information out of the cpCache
31 июл 2023, 21:41
31 июл 2023, 21:41
86783b9
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/* * Copyright (c) 1997, 2023, 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/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 }; static_assert(number_of_codes <= 256, "too many bytecodes"); // Flag bits derived from format strings, can_trap, can_rewrite, etc.: enum Flags : jchar { // 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* const _name [number_of_codes]; static const BasicType _result_type[number_of_codes]; static const s_char _depth [number_of_codes]; static const u_char _lengths [number_of_codes]; static const Code _java_code [number_of_codes]; static jchar _flags [(1<<BitsPerByte)*2]; // all second page for wide formats static void def_flags(Code code, const char* format, const char* wide_format, 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); static jchar compute_flags (const char* format, jchar more_flags); // compute the flags 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 == nullptr || check_method(method, bcp), "bcp must point into method"); Code code = cast(*bcp); assert(code != _breakpoint || method != nullptr, "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 = nullptr); static int raw_special_length_at(address bcp, address end = nullptr); 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 is_field_code (Code code) { return (_getstatic <= java_code(code) && java_code(code) <= _putfield); } 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 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