Mercurial > hg > truffle
annotate src/share/vm/interpreter/bytecode.hpp @ 2142:8012aa3ccede
4926272: methodOopDesc::method_from_bcp is unsafe
Reviewed-by: coleenp, jrose, kvn, dcubed
| author | never |
|---|---|
| date | Thu, 13 Jan 2011 22:15:41 -0800 |
| parents | f95d63e2154a |
| children | 3582bf76420e |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2142 | 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_INTERPRETER_BYTECODE_HPP |
| 26 #define SHARE_VM_INTERPRETER_BYTECODE_HPP | |
| 27 | |
| 28 #include "interpreter/bytecodes.hpp" | |
| 29 #include "memory/allocation.hpp" | |
| 30 #include "oops/methodOop.hpp" | |
| 31 #ifdef TARGET_ARCH_x86 | |
| 32 # include "bytes_x86.hpp" | |
| 33 #endif | |
| 34 #ifdef TARGET_ARCH_sparc | |
| 35 # include "bytes_sparc.hpp" | |
| 36 #endif | |
| 37 #ifdef TARGET_ARCH_zero | |
| 38 # include "bytes_zero.hpp" | |
| 39 #endif | |
| 40 | |
| 2142 | 41 class ciBytecodeStream; |
| 42 | |
| 43 // The base class for different kinds of bytecode abstractions. | |
| 44 // Provides the primitive operations to manipulate code relative | |
| 45 // to the bcp. | |
| 0 | 46 |
| 2142 | 47 class Bytecode: public StackObj { |
| 48 protected: | |
| 49 const address _bcp; | |
| 50 const Bytecodes::Code _code; | |
| 51 | |
| 0 | 52 // Address computation |
| 2142 | 53 address addr_at (int offset) const { return (address)_bcp + offset; } |
| 54 u_char byte_at(int offset) const { return *addr_at(offset); } | |
| 0 | 55 address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); } |
| 56 int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); } | |
| 57 | |
| 1565 | 58 // Word access: |
| 59 int get_Java_u2_at (int offset) const { return Bytes::get_Java_u2(addr_at(offset)); } | |
| 60 int get_Java_u4_at (int offset) const { return Bytes::get_Java_u4(addr_at(offset)); } | |
| 61 int get_native_u2_at (int offset) const { return Bytes::get_native_u2(addr_at(offset)); } | |
| 62 int get_native_u4_at (int offset) const { return Bytes::get_native_u4(addr_at(offset)); } | |
| 0 | 63 |
| 64 public: | |
| 2142 | 65 Bytecode(methodOop method, address bcp): _bcp(bcp), _code(Bytecodes::code_at(method, addr_at(0))) { |
| 66 assert(method != NULL, "this form requires a valid methodOop"); | |
| 67 } | |
| 68 // Defined in ciStreams.hpp | |
| 69 inline Bytecode(const ciBytecodeStream* stream, address bcp = NULL); | |
| 0 | 70 |
| 2142 | 71 // Attributes |
| 72 address bcp() const { return _bcp; } | |
| 73 int instruction_size() const { return Bytecodes::length_for_code_at(_code, bcp()); } | |
| 74 | |
| 75 Bytecodes::Code code() const { return _code; } | |
| 0 | 76 Bytecodes::Code java_code() const { return Bytecodes::java_code(code()); } |
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77 |
| 1565 | 78 // Static functions for parsing bytecodes in place. |
| 79 int get_index_u1(Bytecodes::Code bc) const { | |
| 80 assert_same_format_as(bc); assert_index_size(1, bc); | |
| 81 return *(jubyte*)addr_at(1); | |
| 82 } | |
| 83 int get_index_u2(Bytecodes::Code bc, bool is_wide = false) const { | |
| 84 assert_same_format_as(bc, is_wide); assert_index_size(2, bc, is_wide); | |
| 85 address p = addr_at(is_wide ? 2 : 1); | |
| 86 if (can_use_native_byte_order(bc, is_wide)) | |
| 2142 | 87 return Bytes::get_native_u2(p); |
| 1565 | 88 else return Bytes::get_Java_u2(p); |
| 89 } | |
| 1602 | 90 int get_index_u1_cpcache(Bytecodes::Code bc) const { |
| 91 assert_same_format_as(bc); assert_index_size(1, bc); | |
| 92 return *(jubyte*)addr_at(1) + constantPoolOopDesc::CPCACHE_INDEX_TAG; | |
| 93 } | |
| 1565 | 94 int get_index_u2_cpcache(Bytecodes::Code bc) const { |
| 95 assert_same_format_as(bc); assert_index_size(2, bc); assert_native_index(bc); | |
| 1602 | 96 return Bytes::get_native_u2(addr_at(1)) + constantPoolOopDesc::CPCACHE_INDEX_TAG; |
| 1565 | 97 } |
| 98 int get_index_u4(Bytecodes::Code bc) const { | |
| 99 assert_same_format_as(bc); assert_index_size(4, bc); | |
| 100 assert(can_use_native_byte_order(bc), ""); | |
| 101 return Bytes::get_native_u4(addr_at(1)); | |
| 102 } | |
| 103 bool has_index_u4(Bytecodes::Code bc) const { | |
| 104 return bc == Bytecodes::_invokedynamic; | |
| 105 } | |
| 106 | |
| 107 int get_offset_s2(Bytecodes::Code bc) const { | |
| 108 assert_same_format_as(bc); assert_offset_size(2, bc); | |
| 109 return (jshort) Bytes::get_Java_u2(addr_at(1)); | |
| 110 } | |
| 111 int get_offset_s4(Bytecodes::Code bc) const { | |
| 112 assert_same_format_as(bc); assert_offset_size(4, bc); | |
| 113 return (jint) Bytes::get_Java_u4(addr_at(1)); | |
| 114 } | |
| 115 | |
| 116 int get_constant_u1(int offset, Bytecodes::Code bc) const { | |
| 117 assert_same_format_as(bc); assert_constant_size(1, offset, bc); | |
| 118 return *(jbyte*)addr_at(offset); | |
| 119 } | |
| 120 int get_constant_u2(int offset, Bytecodes::Code bc, bool is_wide = false) const { | |
| 121 assert_same_format_as(bc, is_wide); assert_constant_size(2, offset, bc, is_wide); | |
| 122 return (jshort) Bytes::get_Java_u2(addr_at(offset)); | |
| 123 } | |
| 124 | |
| 125 // These are used locally and also from bytecode streams. | |
| 126 void assert_same_format_as(Bytecodes::Code testbc, bool is_wide = false) const NOT_DEBUG_RETURN; | |
| 127 static void assert_index_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; | |
| 128 static void assert_offset_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; | |
| 129 static void assert_constant_size(int required_size, int where, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; | |
| 130 static void assert_native_index(Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN; | |
| 131 static bool can_use_native_byte_order(Bytecodes::Code bc, bool is_wide = false) { | |
| 132 return (!Bytes::is_Java_byte_ordering_different() || Bytecodes::native_byte_order(bc /*, is_wide*/)); | |
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133 } |
| 0 | 134 }; |
| 135 | |
| 136 | |
| 137 // Abstractions for lookupswitch bytecode | |
| 2142 | 138 class LookupswitchPair VALUE_OBJ_CLASS_SPEC { |
| 0 | 139 private: |
| 2142 | 140 const address _bcp; |
| 141 | |
| 142 address addr_at (int offset) const { return _bcp + offset; } | |
| 143 int get_Java_u4_at (int offset) const { return Bytes::get_Java_u4(addr_at(offset)); } | |
| 0 | 144 |
| 145 public: | |
| 2142 | 146 LookupswitchPair(address bcp): _bcp(bcp) {} |
| 1565 | 147 int match() const { return get_Java_u4_at(0 * jintSize); } |
| 148 int offset() const { return get_Java_u4_at(1 * jintSize); } | |
| 0 | 149 }; |
| 150 | |
| 151 | |
| 152 class Bytecode_lookupswitch: public Bytecode { | |
| 153 public: | |
| 2142 | 154 Bytecode_lookupswitch(methodOop method, address bcp): Bytecode(method, bcp) { verify(); } |
| 155 // Defined in ciStreams.hpp | |
| 156 inline Bytecode_lookupswitch(const ciBytecodeStream* stream); | |
| 0 | 157 void verify() const PRODUCT_RETURN; |
| 158 | |
| 159 // Attributes | |
| 1565 | 160 int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); } |
| 161 int number_of_pairs() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); } | |
| 2142 | 162 LookupswitchPair pair_at(int i) const { |
| 163 assert(0 <= i && i < number_of_pairs(), "pair index out of bounds"); | |
| 164 return LookupswitchPair(aligned_addr_at(1 + (1 + i)*2*jintSize)); | |
| 165 } | |
| 0 | 166 }; |
| 167 | |
| 168 class Bytecode_tableswitch: public Bytecode { | |
| 169 public: | |
| 2142 | 170 Bytecode_tableswitch(methodOop method, address bcp): Bytecode(method, bcp) { verify(); } |
| 171 // Defined in ciStreams.hpp | |
| 172 inline Bytecode_tableswitch(const ciBytecodeStream* stream); | |
| 0 | 173 void verify() const PRODUCT_RETURN; |
| 174 | |
| 175 // Attributes | |
| 1565 | 176 int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); } |
| 177 int low_key() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); } | |
| 178 int high_key() const { return get_Java_u4_at(aligned_offset(1 + 2*jintSize)); } | |
| 0 | 179 int dest_offset_at(int i) const; |
| 180 int length() { return high_key()-low_key()+1; } | |
| 181 }; | |
| 182 | |
| 1602 | 183 // Common code for decoding invokes and field references. |
| 0 | 184 |
| 2142 | 185 class Bytecode_member_ref: public Bytecode { |
| 0 | 186 protected: |
| 2142 | 187 const methodHandle _method; // method containing the bytecode |
| 0 | 188 |
| 2142 | 189 Bytecode_member_ref(methodHandle method, int bci) : Bytecode(method(), method()->bcp_from(bci)), _method(method) {} |
| 190 | |
| 191 methodHandle method() const { return _method; } | |
| 1602 | 192 |
| 193 public: | |
| 194 int index() const; // cache index (loaded from instruction) | |
| 195 int pool_index() const; // constant pool index | |
| 196 symbolOop name() const; // returns the name of the method or field | |
| 197 symbolOop signature() const; // returns the signature of the method or field | |
| 198 | |
| 199 BasicType result_type(Thread* thread) const; // returns the result type of the getfield or invoke | |
| 200 }; | |
| 201 | |
| 202 // Abstraction for invoke_{virtual, static, interface, special} | |
| 203 | |
| 204 class Bytecode_invoke: public Bytecode_member_ref { | |
| 205 protected: | |
| 2142 | 206 // Constructor that skips verification |
| 207 Bytecode_invoke(methodHandle method, int bci, bool unused) : Bytecode_member_ref(method, bci) {} | |
| 0 | 208 |
| 209 public: | |
| 2142 | 210 Bytecode_invoke(methodHandle method, int bci) : Bytecode_member_ref(method, bci) { verify(); } |
| 0 | 211 void verify() const; |
| 212 | |
| 213 // Attributes | |
| 214 methodHandle static_target(TRAPS); // "specified" method (from constant pool) | |
| 215 | |
| 216 // Testers | |
| 1602 | 217 bool is_invokeinterface() const { return java_code() == Bytecodes::_invokeinterface; } |
| 218 bool is_invokevirtual() const { return java_code() == Bytecodes::_invokevirtual; } | |
| 219 bool is_invokestatic() const { return java_code() == Bytecodes::_invokestatic; } | |
| 220 bool is_invokespecial() const { return java_code() == Bytecodes::_invokespecial; } | |
| 221 bool is_invokedynamic() const { return java_code() == Bytecodes::_invokedynamic; } | |
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222 |
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223 bool has_receiver() const { return !is_invokestatic() && !is_invokedynamic(); } |
| 0 | 224 |
| 225 bool is_valid() const { return is_invokeinterface() || | |
| 226 is_invokevirtual() || | |
| 227 is_invokestatic() || | |
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228 is_invokespecial() || |
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229 is_invokedynamic(); } |
| 0 | 230 |
| 2142 | 231 // Helper to skip verification. Used is_valid() to check if the result is really an invoke |
| 232 inline friend Bytecode_invoke Bytecode_invoke_check(methodHandle method, int bci); | |
| 0 | 233 }; |
| 234 | |
| 2142 | 235 inline Bytecode_invoke Bytecode_invoke_check(methodHandle method, int bci) { |
| 236 return Bytecode_invoke(method, bci, false); | |
| 0 | 237 } |
| 238 | |
| 239 | |
| 1602 | 240 // Abstraction for all field accesses (put/get field/static) |
| 241 class Bytecode_field: public Bytecode_member_ref { | |
| 2142 | 242 public: |
| 243 Bytecode_field(methodHandle method, int bci) : Bytecode_member_ref(method, bci) { verify(); } | |
| 1602 | 244 |
| 245 // Testers | |
| 246 bool is_getfield() const { return java_code() == Bytecodes::_getfield; } | |
| 247 bool is_putfield() const { return java_code() == Bytecodes::_putfield; } | |
| 248 bool is_getstatic() const { return java_code() == Bytecodes::_getstatic; } | |
| 249 bool is_putstatic() const { return java_code() == Bytecodes::_putstatic; } | |
| 250 | |
| 251 bool is_getter() const { return is_getfield() || is_getstatic(); } | |
| 252 bool is_static() const { return is_getstatic() || is_putstatic(); } | |
| 253 | |
| 254 bool is_valid() const { return is_getfield() || | |
| 255 is_putfield() || | |
| 256 is_getstatic() || | |
| 257 is_putstatic(); } | |
| 0 | 258 void verify() const; |
| 259 }; | |
| 260 | |
| 261 // Abstraction for checkcast | |
| 262 class Bytecode_checkcast: public Bytecode { | |
| 263 public: | |
| 2142 | 264 Bytecode_checkcast(methodOop method, address bcp): Bytecode(method, bcp) { verify(); } |
| 0 | 265 void verify() const { assert(Bytecodes::java_code(code()) == Bytecodes::_checkcast, "check checkcast"); } |
| 266 | |
| 267 // Returns index | |
| 1565 | 268 long index() const { return get_index_u2(Bytecodes::_checkcast); }; |
| 0 | 269 }; |
| 270 | |
| 271 // Abstraction for instanceof | |
| 272 class Bytecode_instanceof: public Bytecode { | |
| 273 public: | |
| 2142 | 274 Bytecode_instanceof(methodOop method, address bcp): Bytecode(method, bcp) { verify(); } |
| 0 | 275 void verify() const { assert(code() == Bytecodes::_instanceof, "check instanceof"); } |
| 276 | |
| 277 // Returns index | |
| 1565 | 278 long index() const { return get_index_u2(Bytecodes::_instanceof); }; |
| 0 | 279 }; |
| 280 | |
| 281 class Bytecode_new: public Bytecode { | |
| 282 public: | |
| 2142 | 283 Bytecode_new(methodOop method, address bcp): Bytecode(method, bcp) { verify(); } |
| 0 | 284 void verify() const { assert(java_code() == Bytecodes::_new, "check new"); } |
| 285 | |
| 286 // Returns index | |
| 1565 | 287 long index() const { return get_index_u2(Bytecodes::_new); }; |
| 0 | 288 }; |
| 289 | |
| 290 class Bytecode_multianewarray: public Bytecode { | |
| 291 public: | |
| 2142 | 292 Bytecode_multianewarray(methodOop method, address bcp): Bytecode(method, bcp) { verify(); } |
| 0 | 293 void verify() const { assert(java_code() == Bytecodes::_multianewarray, "check new"); } |
| 294 | |
| 295 // Returns index | |
| 1565 | 296 long index() const { return get_index_u2(Bytecodes::_multianewarray); }; |
| 0 | 297 }; |
| 298 | |
| 299 class Bytecode_anewarray: public Bytecode { | |
| 300 public: | |
| 2142 | 301 Bytecode_anewarray(methodOop method, address bcp): Bytecode(method, bcp) { verify(); } |
| 0 | 302 void verify() const { assert(java_code() == Bytecodes::_anewarray, "check anewarray"); } |
| 303 | |
| 304 // Returns index | |
| 1565 | 305 long index() const { return get_index_u2(Bytecodes::_anewarray); }; |
| 0 | 306 }; |
| 307 | |
| 308 // Abstraction for ldc, ldc_w and ldc2_w | |
| 2142 | 309 class Bytecode_loadconstant: public Bytecode { |
| 1602 | 310 private: |
| 2142 | 311 const methodHandle _method; |
| 1602 | 312 |
| 313 int raw_index() const; | |
| 314 | |
| 0 | 315 public: |
| 2142 | 316 Bytecode_loadconstant(methodHandle method, int bci): Bytecode(method(), method->bcp_from(bci)), _method(method) { verify(); } |
| 1602 | 317 |
| 0 | 318 void verify() const { |
| 1602 | 319 assert(_method.not_null(), "must supply method"); |
| 0 | 320 Bytecodes::Code stdc = Bytecodes::java_code(code()); |
| 321 assert(stdc == Bytecodes::_ldc || | |
| 322 stdc == Bytecodes::_ldc_w || | |
| 323 stdc == Bytecodes::_ldc2_w, "load constant"); | |
| 324 } | |
| 325 | |
| 1602 | 326 // Only non-standard bytecodes (fast_aldc) have CP cache indexes. |
| 327 bool has_cache_index() const { return code() >= Bytecodes::number_of_java_codes; } | |
| 0 | 328 |
| 1602 | 329 int pool_index() const; // index into constant pool |
| 330 int cache_index() const { // index into CP cache (or -1 if none) | |
| 331 return has_cache_index() ? raw_index() : -1; | |
| 332 } | |
| 333 | |
| 334 BasicType result_type() const; // returns the result type of the ldc | |
| 335 | |
| 336 oop resolve_constant(TRAPS) const; | |
| 0 | 337 }; |
| 338 | |
| 1972 | 339 #endif // SHARE_VM_INTERPRETER_BYTECODE_HPP |