1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/interpreter/bytecode.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,376 @@
1.4 +/*
1.5 + * Copyright 1997-2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +// Base class for different kinds of abstractions working
1.29 +// relative to an objects 'this' pointer.
1.30 +
1.31 +class ThisRelativeObj VALUE_OBJ_CLASS_SPEC {
1.32 + private:
1.33 + int sign_extend (int x, int size) const { const int s = (BytesPerInt - size)*BitsPerByte; return (x << s) >> s; }
1.34 +
1.35 + public:
1.36 + // Address computation
1.37 + address addr_at (int offset) const { return (address)this + offset; }
1.38 + address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); }
1.39 + int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); }
1.40 +
1.41 + // Java unsigned accessors (using Java spec byte ordering)
1.42 + int java_byte_at (int offset) const { return *(jubyte*)addr_at(offset); }
1.43 + int java_hwrd_at (int offset) const { return java_byte_at(offset) << (1 * BitsPerByte) | java_byte_at(offset + 1); }
1.44 + int java_word_at (int offset) const { return java_hwrd_at(offset) << (2 * BitsPerByte) | java_hwrd_at(offset + 2); }
1.45 +
1.46 + // Java signed accessors (using Java spec byte ordering)
1.47 + int java_signed_byte_at(int offset) const { return sign_extend(java_byte_at(offset), 1); }
1.48 + int java_signed_hwrd_at(int offset) const { return sign_extend(java_hwrd_at(offset), 2); }
1.49 + int java_signed_word_at(int offset) const { return java_word_at(offset) ; }
1.50 +
1.51 + // Fast accessors (using the machine's natural byte ordering)
1.52 + int fast_byte_at (int offset) const { return *(jubyte *)addr_at(offset); }
1.53 + int fast_hwrd_at (int offset) const { return *(jushort*)addr_at(offset); }
1.54 + int fast_word_at (int offset) const { return *(juint *)addr_at(offset); }
1.55 +
1.56 + // Fast signed accessors (using the machine's natural byte ordering)
1.57 + int fast_signed_byte_at(int offset) const { return *(jbyte *)addr_at(offset); }
1.58 + int fast_signed_hwrd_at(int offset) const { return *(jshort*)addr_at(offset); }
1.59 + int fast_signed_word_at(int offset) const { return *(jint *)addr_at(offset); }
1.60 +
1.61 + // Fast manipulators (using the machine's natural byte ordering)
1.62 + void set_fast_byte_at (int offset, int x) const { *(jbyte *)addr_at(offset) = (jbyte )x; }
1.63 + void set_fast_hwrd_at (int offset, int x) const { *(jshort*)addr_at(offset) = (jshort)x; }
1.64 + void set_fast_word_at (int offset, int x) const { *(jint *)addr_at(offset) = (jint )x; }
1.65 +};
1.66 +
1.67 +
1.68 +// The base class for different kinds of bytecode abstractions.
1.69 +// Provides the primitive operations to manipulate code relative
1.70 +// to an objects 'this' pointer.
1.71 +//
1.72 +// Note: Even though it seems that the fast_index & set_fast_index
1.73 +// functions are machine specific, they're not. They only use
1.74 +// the natural way to store a 16bit index on a given machine,
1.75 +// independent of the particular byte ordering. Since all other
1.76 +// places in the system that refer to these indices use the
1.77 +// same method (the natural byte ordering on the platform)
1.78 +// this will always work and be machine-independent).
1.79 +
1.80 +class Bytecode: public ThisRelativeObj {
1.81 + protected:
1.82 + u_char byte_at(int offset) const { return *addr_at(offset); }
1.83 + bool check_must_rewrite() const;
1.84 +
1.85 + public:
1.86 + // Attributes
1.87 + address bcp() const { return addr_at(0); }
1.88 + address next_bcp() const { return addr_at(0) + Bytecodes::length_at(bcp()); }
1.89 +
1.90 + Bytecodes::Code code() const { return Bytecodes::code_at(addr_at(0)); }
1.91 + Bytecodes::Code java_code() const { return Bytecodes::java_code(code()); }
1.92 + bool must_rewrite() const { return Bytecodes::can_rewrite(code()) && check_must_rewrite(); }
1.93 + bool is_active_breakpoint() const { return Bytecodes::is_active_breakpoint_at(bcp()); }
1.94 +
1.95 + int one_byte_index() const { return byte_at(1); }
1.96 + int two_byte_index() const { return (byte_at(1) << 8) + byte_at(2); }
1.97 + int offset() const { return (two_byte_index() << 16) >> 16; }
1.98 + address destination() const { return bcp() + offset(); }
1.99 + int fast_index() const { return Bytes::get_native_u2(addr_at(1)); }
1.100 +
1.101 + // Attribute modification
1.102 + void set_code(Bytecodes::Code code);
1.103 + void set_fast_index(int i);
1.104 +
1.105 + // Creation
1.106 + inline friend Bytecode* Bytecode_at(address bcp);
1.107 +};
1.108 +
1.109 +inline Bytecode* Bytecode_at(address bcp) {
1.110 + return (Bytecode*)bcp;
1.111 +}
1.112 +
1.113 +
1.114 +// Abstractions for lookupswitch bytecode
1.115 +
1.116 +class LookupswitchPair: ThisRelativeObj {
1.117 + private:
1.118 + int _match;
1.119 + int _offset;
1.120 +
1.121 + public:
1.122 + int match() const { return java_signed_word_at(0 * jintSize); }
1.123 + int offset() const { return java_signed_word_at(1 * jintSize); }
1.124 +};
1.125 +
1.126 +
1.127 +class Bytecode_lookupswitch: public Bytecode {
1.128 + public:
1.129 + void verify() const PRODUCT_RETURN;
1.130 +
1.131 + // Attributes
1.132 + int default_offset() const { return java_signed_word_at(aligned_offset(1 + 0*jintSize)); }
1.133 + int number_of_pairs() const { return java_signed_word_at(aligned_offset(1 + 1*jintSize)); }
1.134 + LookupswitchPair* pair_at(int i) const { assert(0 <= i && i < number_of_pairs(), "pair index out of bounds");
1.135 + return (LookupswitchPair*)aligned_addr_at(1 + (1 + i)*2*jintSize); }
1.136 + // Creation
1.137 + inline friend Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp);
1.138 +};
1.139 +
1.140 +inline Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp) {
1.141 + Bytecode_lookupswitch* b = (Bytecode_lookupswitch*)bcp;
1.142 + debug_only(b->verify());
1.143 + return b;
1.144 +}
1.145 +
1.146 +
1.147 +class Bytecode_tableswitch: public Bytecode {
1.148 + public:
1.149 + void verify() const PRODUCT_RETURN;
1.150 +
1.151 + // Attributes
1.152 + int default_offset() const { return java_signed_word_at(aligned_offset(1 + 0*jintSize)); }
1.153 + int low_key() const { return java_signed_word_at(aligned_offset(1 + 1*jintSize)); }
1.154 + int high_key() const { return java_signed_word_at(aligned_offset(1 + 2*jintSize)); }
1.155 + int dest_offset_at(int i) const;
1.156 + int length() { return high_key()-low_key()+1; }
1.157 +
1.158 + // Creation
1.159 + inline friend Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp);
1.160 +};
1.161 +
1.162 +inline Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp) {
1.163 + Bytecode_tableswitch* b = (Bytecode_tableswitch*)bcp;
1.164 + debug_only(b->verify());
1.165 + return b;
1.166 +}
1.167 +
1.168 +
1.169 +// Abstraction for invoke_{virtual, static, interface, special}
1.170 +
1.171 +class Bytecode_invoke: public ResourceObj {
1.172 + protected:
1.173 + methodHandle _method; // method containing the bytecode
1.174 + int _bci; // position of the bytecode
1.175 +
1.176 + Bytecode_invoke(methodHandle method, int bci) : _method(method), _bci(bci) {}
1.177 +
1.178 + public:
1.179 + void verify() const;
1.180 +
1.181 + // Attributes
1.182 + methodHandle method() const { return _method; }
1.183 + int bci() const { return _bci; }
1.184 + address bcp() const { return _method->bcp_from(bci()); }
1.185 +
1.186 + int index() const; // the constant pool index for the invoke
1.187 + symbolOop name() const; // returns the name of the invoked method
1.188 + symbolOop signature() const; // returns the signature of the invoked method
1.189 + BasicType result_type(Thread *thread) const; // returns the result type of the invoke
1.190 +
1.191 + Bytecodes::Code code() const { return Bytecodes::code_at(bcp(), _method()); }
1.192 + Bytecodes::Code adjusted_invoke_code() const { return Bytecodes::java_code(code()); }
1.193 +
1.194 + methodHandle static_target(TRAPS); // "specified" method (from constant pool)
1.195 +
1.196 + // Testers
1.197 + bool is_invokeinterface() const { return adjusted_invoke_code() == Bytecodes::_invokeinterface; }
1.198 + bool is_invokevirtual() const { return adjusted_invoke_code() == Bytecodes::_invokevirtual; }
1.199 + bool is_invokestatic() const { return adjusted_invoke_code() == Bytecodes::_invokestatic; }
1.200 + bool is_invokespecial() const { return adjusted_invoke_code() == Bytecodes::_invokespecial; }
1.201 +
1.202 + bool is_valid() const { return is_invokeinterface() ||
1.203 + is_invokevirtual() ||
1.204 + is_invokestatic() ||
1.205 + is_invokespecial(); }
1.206 +
1.207 + // Creation
1.208 + inline friend Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci);
1.209 +
1.210 + // Like Bytecode_invoke_at. Instead it returns NULL if the bci is not at an invoke.
1.211 + inline friend Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci);
1.212 +};
1.213 +
1.214 +inline Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci) {
1.215 + Bytecode_invoke* b = new Bytecode_invoke(method, bci);
1.216 + debug_only(b->verify());
1.217 + return b;
1.218 +}
1.219 +
1.220 +inline Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci) {
1.221 + Bytecode_invoke* b = new Bytecode_invoke(method, bci);
1.222 + return b->is_valid() ? b : NULL;
1.223 +}
1.224 +
1.225 +
1.226 +// Abstraction for all field accesses (put/get field/static_
1.227 +class Bytecode_field: public Bytecode {
1.228 +public:
1.229 + void verify() const;
1.230 +
1.231 + int index() const;
1.232 + bool is_static() const;
1.233 +
1.234 + // Creation
1.235 + inline friend Bytecode_field* Bytecode_field_at(const methodOop method, address bcp);
1.236 +};
1.237 +
1.238 +inline Bytecode_field* Bytecode_field_at(const methodOop method, address bcp) {
1.239 + Bytecode_field* b = (Bytecode_field*)bcp;
1.240 + debug_only(b->verify());
1.241 + return b;
1.242 +}
1.243 +
1.244 +
1.245 +// Abstraction for {get,put}static
1.246 +
1.247 +class Bytecode_static: public Bytecode {
1.248 + public:
1.249 + void verify() const;
1.250 +
1.251 + // Returns the result type of the send by inspecting the field ref
1.252 + BasicType result_type(methodOop method) const;
1.253 +
1.254 + // Creation
1.255 + inline friend Bytecode_static* Bytecode_static_at(const methodOop method, address bcp);
1.256 +};
1.257 +
1.258 +inline Bytecode_static* Bytecode_static_at(const methodOop method, address bcp) {
1.259 + Bytecode_static* b = (Bytecode_static*)bcp;
1.260 + debug_only(b->verify());
1.261 + return b;
1.262 +}
1.263 +
1.264 +
1.265 +// Abstraction for checkcast
1.266 +
1.267 +class Bytecode_checkcast: public Bytecode {
1.268 + public:
1.269 + void verify() const { assert(Bytecodes::java_code(code()) == Bytecodes::_checkcast, "check checkcast"); }
1.270 +
1.271 + // Returns index
1.272 + long index() const { return java_hwrd_at(1); };
1.273 +
1.274 + // Creation
1.275 + inline friend Bytecode_checkcast* Bytecode_checkcast_at(address bcp);
1.276 +};
1.277 +
1.278 +inline Bytecode_checkcast* Bytecode_checkcast_at(address bcp) {
1.279 + Bytecode_checkcast* b = (Bytecode_checkcast*)bcp;
1.280 + debug_only(b->verify());
1.281 + return b;
1.282 +}
1.283 +
1.284 +
1.285 +// Abstraction for instanceof
1.286 +
1.287 +class Bytecode_instanceof: public Bytecode {
1.288 + public:
1.289 + void verify() const { assert(code() == Bytecodes::_instanceof, "check instanceof"); }
1.290 +
1.291 + // Returns index
1.292 + long index() const { return java_hwrd_at(1); };
1.293 +
1.294 + // Creation
1.295 + inline friend Bytecode_instanceof* Bytecode_instanceof_at(address bcp);
1.296 +};
1.297 +
1.298 +inline Bytecode_instanceof* Bytecode_instanceof_at(address bcp) {
1.299 + Bytecode_instanceof* b = (Bytecode_instanceof*)bcp;
1.300 + debug_only(b->verify());
1.301 + return b;
1.302 +}
1.303 +
1.304 +
1.305 +class Bytecode_new: public Bytecode {
1.306 + public:
1.307 + void verify() const { assert(java_code() == Bytecodes::_new, "check new"); }
1.308 +
1.309 + // Returns index
1.310 + long index() const { return java_hwrd_at(1); };
1.311 +
1.312 + // Creation
1.313 + inline friend Bytecode_new* Bytecode_new_at(address bcp);
1.314 +};
1.315 +
1.316 +inline Bytecode_new* Bytecode_new_at(address bcp) {
1.317 + Bytecode_new* b = (Bytecode_new*)bcp;
1.318 + debug_only(b->verify());
1.319 + return b;
1.320 +}
1.321 +
1.322 +
1.323 +class Bytecode_multianewarray: public Bytecode {
1.324 + public:
1.325 + void verify() const { assert(java_code() == Bytecodes::_multianewarray, "check new"); }
1.326 +
1.327 + // Returns index
1.328 + long index() const { return java_hwrd_at(1); };
1.329 +
1.330 + // Creation
1.331 + inline friend Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp);
1.332 +};
1.333 +
1.334 +inline Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp) {
1.335 + Bytecode_multianewarray* b = (Bytecode_multianewarray*)bcp;
1.336 + debug_only(b->verify());
1.337 + return b;
1.338 +}
1.339 +
1.340 +
1.341 +class Bytecode_anewarray: public Bytecode {
1.342 + public:
1.343 + void verify() const { assert(java_code() == Bytecodes::_anewarray, "check anewarray"); }
1.344 +
1.345 + // Returns index
1.346 + long index() const { return java_hwrd_at(1); };
1.347 +
1.348 + // Creation
1.349 + inline friend Bytecode_anewarray* Bytecode_anewarray_at(address bcp);
1.350 +};
1.351 +
1.352 +inline Bytecode_anewarray* Bytecode_anewarray_at(address bcp) {
1.353 + Bytecode_anewarray* b = (Bytecode_anewarray*)bcp;
1.354 + debug_only(b->verify());
1.355 + return b;
1.356 +}
1.357 +
1.358 +
1.359 +// Abstraction for ldc, ldc_w and ldc2_w
1.360 +
1.361 +class Bytecode_loadconstant: public Bytecode {
1.362 + public:
1.363 + void verify() const {
1.364 + Bytecodes::Code stdc = Bytecodes::java_code(code());
1.365 + assert(stdc == Bytecodes::_ldc ||
1.366 + stdc == Bytecodes::_ldc_w ||
1.367 + stdc == Bytecodes::_ldc2_w, "load constant");
1.368 + }
1.369 +
1.370 + int index() const;
1.371 +
1.372 + inline friend Bytecode_loadconstant* Bytecode_loadconstant_at(const methodOop method, address bcp);
1.373 +};
1.374 +
1.375 +inline Bytecode_loadconstant* Bytecode_loadconstant_at(const methodOop method, address bcp) {
1.376 + Bytecode_loadconstant* b = (Bytecode_loadconstant*)bcp;
1.377 + debug_only(b->verify());
1.378 + return b;
1.379 +}
