1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/interpreter/bytecode.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,356 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_INTERPRETER_BYTECODE_HPP
1.29 +#define SHARE_VM_INTERPRETER_BYTECODE_HPP
1.30 +
1.31 +#include "interpreter/bytecodes.hpp"
1.32 +#include "memory/allocation.hpp"
1.33 +#include "oops/method.hpp"
1.34 +#ifdef TARGET_ARCH_x86
1.35 +# include "bytes_x86.hpp"
1.36 +#endif
1.37 +#ifdef TARGET_ARCH_sparc
1.38 +# include "bytes_sparc.hpp"
1.39 +#endif
1.40 +#ifdef TARGET_ARCH_zero
1.41 +# include "bytes_zero.hpp"
1.42 +#endif
1.43 +#ifdef TARGET_ARCH_arm
1.44 +# include "bytes_arm.hpp"
1.45 +#endif
1.46 +#ifdef TARGET_ARCH_ppc
1.47 +# include "bytes_ppc.hpp"
1.48 +#endif
1.49 +
1.50 +class ciBytecodeStream;
1.51 +
1.52 +// The base class for different kinds of bytecode abstractions.
1.53 +// Provides the primitive operations to manipulate code relative
1.54 +// to the bcp.
1.55 +
1.56 +class Bytecode: public StackObj {
1.57 + protected:
1.58 + const address _bcp;
1.59 + const Bytecodes::Code _code;
1.60 +
1.61 + // Address computation
1.62 + address addr_at (int offset) const { return (address)_bcp + offset; }
1.63 + u_char byte_at(int offset) const { return *addr_at(offset); }
1.64 + address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); }
1.65 + int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); }
1.66 +
1.67 + // Word access:
1.68 + int get_Java_u2_at (int offset) const { return Bytes::get_Java_u2(addr_at(offset)); }
1.69 + int get_Java_u4_at (int offset) const { return Bytes::get_Java_u4(addr_at(offset)); }
1.70 + int get_native_u2_at (int offset) const { return Bytes::get_native_u2(addr_at(offset)); }
1.71 + int get_native_u4_at (int offset) const { return Bytes::get_native_u4(addr_at(offset)); }
1.72 +
1.73 + public:
1.74 + Bytecode(Method* method, address bcp): _bcp(bcp), _code(Bytecodes::code_at(method, addr_at(0))) {
1.75 + assert(method != NULL, "this form requires a valid Method*");
1.76 + }
1.77 + // Defined in ciStreams.hpp
1.78 + inline Bytecode(const ciBytecodeStream* stream, address bcp = NULL);
1.79 +
1.80 + // Attributes
1.81 + address bcp() const { return _bcp; }
1.82 + int instruction_size() const { return Bytecodes::length_for_code_at(_code, bcp()); }
1.83 +
1.84 + Bytecodes::Code code() const { return _code; }
1.85 + Bytecodes::Code java_code() const { return Bytecodes::java_code(code()); }
1.86 + Bytecodes::Code invoke_code() const { return (code() == Bytecodes::_invokehandle) ? code() : java_code(); }
1.87 +
1.88 + // Static functions for parsing bytecodes in place.
1.89 + int get_index_u1(Bytecodes::Code bc) const {
1.90 + assert_same_format_as(bc); assert_index_size(1, bc);
1.91 + return *(jubyte*)addr_at(1);
1.92 + }
1.93 + int get_index_u2(Bytecodes::Code bc, bool is_wide = false) const {
1.94 + assert_same_format_as(bc, is_wide); assert_index_size(2, bc, is_wide);
1.95 + address p = addr_at(is_wide ? 2 : 1);
1.96 + if (can_use_native_byte_order(bc, is_wide))
1.97 + return Bytes::get_native_u2(p);
1.98 + else return Bytes::get_Java_u2(p);
1.99 + }
1.100 + int get_index_u1_cpcache(Bytecodes::Code bc) const {
1.101 + assert_same_format_as(bc); assert_index_size(1, bc);
1.102 + return *(jubyte*)addr_at(1) + ConstantPool::CPCACHE_INDEX_TAG;
1.103 + }
1.104 + int get_index_u2_cpcache(Bytecodes::Code bc) const {
1.105 + assert_same_format_as(bc); assert_index_size(2, bc); assert_native_index(bc);
1.106 + return Bytes::get_native_u2(addr_at(1)) + ConstantPool::CPCACHE_INDEX_TAG;
1.107 + }
1.108 + int get_index_u4(Bytecodes::Code bc) const {
1.109 + assert_same_format_as(bc); assert_index_size(4, bc);
1.110 + assert(can_use_native_byte_order(bc), "");
1.111 + return Bytes::get_native_u4(addr_at(1));
1.112 + }
1.113 + bool has_index_u4(Bytecodes::Code bc) const {
1.114 + return bc == Bytecodes::_invokedynamic;
1.115 + }
1.116 +
1.117 + int get_offset_s2(Bytecodes::Code bc) const {
1.118 + assert_same_format_as(bc); assert_offset_size(2, bc);
1.119 + return (jshort) Bytes::get_Java_u2(addr_at(1));
1.120 + }
1.121 + int get_offset_s4(Bytecodes::Code bc) const {
1.122 + assert_same_format_as(bc); assert_offset_size(4, bc);
1.123 + return (jint) Bytes::get_Java_u4(addr_at(1));
1.124 + }
1.125 +
1.126 + int get_constant_u1(int offset, Bytecodes::Code bc) const {
1.127 + assert_same_format_as(bc); assert_constant_size(1, offset, bc);
1.128 + return *(jbyte*)addr_at(offset);
1.129 + }
1.130 + int get_constant_u2(int offset, Bytecodes::Code bc, bool is_wide = false) const {
1.131 + assert_same_format_as(bc, is_wide); assert_constant_size(2, offset, bc, is_wide);
1.132 + return (jshort) Bytes::get_Java_u2(addr_at(offset));
1.133 + }
1.134 +
1.135 + // These are used locally and also from bytecode streams.
1.136 + void assert_same_format_as(Bytecodes::Code testbc, bool is_wide = false) const NOT_DEBUG_RETURN;
1.137 + static void assert_index_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
1.138 + static void assert_offset_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
1.139 + static void assert_constant_size(int required_size, int where, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
1.140 + static void assert_native_index(Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
1.141 + static bool can_use_native_byte_order(Bytecodes::Code bc, bool is_wide = false) {
1.142 + return (!Bytes::is_Java_byte_ordering_different() || Bytecodes::native_byte_order(bc /*, is_wide*/));
1.143 + }
1.144 +};
1.145 +
1.146 +
1.147 +// Abstractions for lookupswitch bytecode
1.148 +class LookupswitchPair VALUE_OBJ_CLASS_SPEC {
1.149 + private:
1.150 + const address _bcp;
1.151 +
1.152 + address addr_at (int offset) const { return _bcp + offset; }
1.153 + int get_Java_u4_at (int offset) const { return Bytes::get_Java_u4(addr_at(offset)); }
1.154 +
1.155 + public:
1.156 + LookupswitchPair(address bcp): _bcp(bcp) {}
1.157 + int match() const { return get_Java_u4_at(0 * jintSize); }
1.158 + int offset() const { return get_Java_u4_at(1 * jintSize); }
1.159 +};
1.160 +
1.161 +
1.162 +class Bytecode_lookupswitch: public Bytecode {
1.163 + public:
1.164 + Bytecode_lookupswitch(Method* method, address bcp): Bytecode(method, bcp) { verify(); }
1.165 + // Defined in ciStreams.hpp
1.166 + inline Bytecode_lookupswitch(const ciBytecodeStream* stream);
1.167 + void verify() const PRODUCT_RETURN;
1.168 +
1.169 + // Attributes
1.170 + int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); }
1.171 + int number_of_pairs() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); }
1.172 + LookupswitchPair pair_at(int i) const {
1.173 + assert(0 <= i && i < number_of_pairs(), "pair index out of bounds");
1.174 + return LookupswitchPair(aligned_addr_at(1 + (1 + i)*2*jintSize));
1.175 + }
1.176 +};
1.177 +
1.178 +class Bytecode_tableswitch: public Bytecode {
1.179 + public:
1.180 + Bytecode_tableswitch(Method* method, address bcp): Bytecode(method, bcp) { verify(); }
1.181 + // Defined in ciStreams.hpp
1.182 + inline Bytecode_tableswitch(const ciBytecodeStream* stream);
1.183 + void verify() const PRODUCT_RETURN;
1.184 +
1.185 + // Attributes
1.186 + int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); }
1.187 + int low_key() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); }
1.188 + int high_key() const { return get_Java_u4_at(aligned_offset(1 + 2*jintSize)); }
1.189 + int dest_offset_at(int i) const;
1.190 + int length() { return high_key()-low_key()+1; }
1.191 +};
1.192 +
1.193 +// Common code for decoding invokes and field references.
1.194 +
1.195 +class Bytecode_member_ref: public Bytecode {
1.196 + protected:
1.197 + const methodHandle _method; // method containing the bytecode
1.198 +
1.199 + Bytecode_member_ref(methodHandle method, int bci) : Bytecode(method(), method()->bcp_from(bci)), _method(method) {}
1.200 +
1.201 + methodHandle method() const { return _method; }
1.202 + ConstantPool* constants() const { return _method->constants(); }
1.203 + ConstantPoolCache* cpcache() const { return _method->constants()->cache(); }
1.204 + ConstantPoolCacheEntry* cpcache_entry() const;
1.205 +
1.206 + public:
1.207 + int index() const; // cache index (loaded from instruction)
1.208 + int pool_index() const; // constant pool index
1.209 + Symbol* klass() const; // returns the klass of the method or field
1.210 + Symbol* name() const; // returns the name of the method or field
1.211 + Symbol* signature() const; // returns the signature of the method or field
1.212 +
1.213 + BasicType result_type() const; // returns the result type of the getfield or invoke
1.214 +};
1.215 +
1.216 +// Abstraction for invoke_{virtual, static, interface, special}
1.217 +
1.218 +class Bytecode_invoke: public Bytecode_member_ref {
1.219 + protected:
1.220 + // Constructor that skips verification
1.221 + Bytecode_invoke(methodHandle method, int bci, bool unused) : Bytecode_member_ref(method, bci) {}
1.222 +
1.223 + public:
1.224 + Bytecode_invoke(methodHandle method, int bci) : Bytecode_member_ref(method, bci) { verify(); }
1.225 + void verify() const;
1.226 +
1.227 + // Attributes
1.228 + methodHandle static_target(TRAPS); // "specified" method (from constant pool)
1.229 + Handle appendix(TRAPS); // if CPCE::has_appendix (from constant pool)
1.230 +
1.231 + // Testers
1.232 + bool is_invokeinterface() const { return invoke_code() == Bytecodes::_invokeinterface; }
1.233 + bool is_invokevirtual() const { return invoke_code() == Bytecodes::_invokevirtual; }
1.234 + bool is_invokestatic() const { return invoke_code() == Bytecodes::_invokestatic; }
1.235 + bool is_invokespecial() const { return invoke_code() == Bytecodes::_invokespecial; }
1.236 + bool is_invokedynamic() const { return invoke_code() == Bytecodes::_invokedynamic; }
1.237 + bool is_invokehandle() const { return invoke_code() == Bytecodes::_invokehandle; }
1.238 +
1.239 + bool has_receiver() const { return !is_invokestatic() && !is_invokedynamic(); }
1.240 +
1.241 + bool is_valid() const { return is_invokeinterface() ||
1.242 + is_invokevirtual() ||
1.243 + is_invokestatic() ||
1.244 + is_invokespecial() ||
1.245 + is_invokedynamic() ||
1.246 + is_invokehandle(); }
1.247 +
1.248 + bool has_appendix() { return cpcache_entry()->has_appendix(); }
1.249 +
1.250 + private:
1.251 + // Helper to skip verification. Used is_valid() to check if the result is really an invoke
1.252 + inline friend Bytecode_invoke Bytecode_invoke_check(methodHandle method, int bci);
1.253 +};
1.254 +
1.255 +inline Bytecode_invoke Bytecode_invoke_check(methodHandle method, int bci) {
1.256 + return Bytecode_invoke(method, bci, false);
1.257 +}
1.258 +
1.259 +
1.260 +// Abstraction for all field accesses (put/get field/static)
1.261 +class Bytecode_field: public Bytecode_member_ref {
1.262 + public:
1.263 + Bytecode_field(methodHandle method, int bci) : Bytecode_member_ref(method, bci) { verify(); }
1.264 +
1.265 + // Testers
1.266 + bool is_getfield() const { return java_code() == Bytecodes::_getfield; }
1.267 + bool is_putfield() const { return java_code() == Bytecodes::_putfield; }
1.268 + bool is_getstatic() const { return java_code() == Bytecodes::_getstatic; }
1.269 + bool is_putstatic() const { return java_code() == Bytecodes::_putstatic; }
1.270 +
1.271 + bool is_getter() const { return is_getfield() || is_getstatic(); }
1.272 + bool is_static() const { return is_getstatic() || is_putstatic(); }
1.273 +
1.274 + bool is_valid() const { return is_getfield() ||
1.275 + is_putfield() ||
1.276 + is_getstatic() ||
1.277 + is_putstatic(); }
1.278 + void verify() const;
1.279 +};
1.280 +
1.281 +// Abstraction for checkcast
1.282 +class Bytecode_checkcast: public Bytecode {
1.283 + public:
1.284 + Bytecode_checkcast(Method* method, address bcp): Bytecode(method, bcp) { verify(); }
1.285 + void verify() const { assert(Bytecodes::java_code(code()) == Bytecodes::_checkcast, "check checkcast"); }
1.286 +
1.287 + // Returns index
1.288 + long index() const { return get_index_u2(Bytecodes::_checkcast); };
1.289 +};
1.290 +
1.291 +// Abstraction for instanceof
1.292 +class Bytecode_instanceof: public Bytecode {
1.293 + public:
1.294 + Bytecode_instanceof(Method* method, address bcp): Bytecode(method, bcp) { verify(); }
1.295 + void verify() const { assert(code() == Bytecodes::_instanceof, "check instanceof"); }
1.296 +
1.297 + // Returns index
1.298 + long index() const { return get_index_u2(Bytecodes::_instanceof); };
1.299 +};
1.300 +
1.301 +class Bytecode_new: public Bytecode {
1.302 + public:
1.303 + Bytecode_new(Method* method, address bcp): Bytecode(method, bcp) { verify(); }
1.304 + void verify() const { assert(java_code() == Bytecodes::_new, "check new"); }
1.305 +
1.306 + // Returns index
1.307 + long index() const { return get_index_u2(Bytecodes::_new); };
1.308 +};
1.309 +
1.310 +class Bytecode_multianewarray: public Bytecode {
1.311 + public:
1.312 + Bytecode_multianewarray(Method* method, address bcp): Bytecode(method, bcp) { verify(); }
1.313 + void verify() const { assert(java_code() == Bytecodes::_multianewarray, "check new"); }
1.314 +
1.315 + // Returns index
1.316 + long index() const { return get_index_u2(Bytecodes::_multianewarray); };
1.317 +};
1.318 +
1.319 +class Bytecode_anewarray: public Bytecode {
1.320 + public:
1.321 + Bytecode_anewarray(Method* method, address bcp): Bytecode(method, bcp) { verify(); }
1.322 + void verify() const { assert(java_code() == Bytecodes::_anewarray, "check anewarray"); }
1.323 +
1.324 + // Returns index
1.325 + long index() const { return get_index_u2(Bytecodes::_anewarray); };
1.326 +};
1.327 +
1.328 +// Abstraction for ldc, ldc_w and ldc2_w
1.329 +class Bytecode_loadconstant: public Bytecode {
1.330 + private:
1.331 + const methodHandle _method;
1.332 +
1.333 + int raw_index() const;
1.334 +
1.335 + public:
1.336 + Bytecode_loadconstant(methodHandle method, int bci): Bytecode(method(), method->bcp_from(bci)), _method(method) { verify(); }
1.337 +
1.338 + void verify() const {
1.339 + assert(_method.not_null(), "must supply method");
1.340 + Bytecodes::Code stdc = Bytecodes::java_code(code());
1.341 + assert(stdc == Bytecodes::_ldc ||
1.342 + stdc == Bytecodes::_ldc_w ||
1.343 + stdc == Bytecodes::_ldc2_w, "load constant");
1.344 + }
1.345 +
1.346 + // Only non-standard bytecodes (fast_aldc) have reference cache indexes.
1.347 + bool has_cache_index() const { return code() >= Bytecodes::number_of_java_codes; }
1.348 +
1.349 + int pool_index() const; // index into constant pool
1.350 + int cache_index() const { // index into reference cache (or -1 if none)
1.351 + return has_cache_index() ? raw_index() : -1;
1.352 + }
1.353 +
1.354 + BasicType result_type() const; // returns the result type of the ldc
1.355 +
1.356 + oop resolve_constant(TRAPS) const;
1.357 +};
1.358 +
1.359 +#endif // SHARE_VM_INTERPRETER_BYTECODE_HPP
