Mercurial > hg > truffle
annotate src/share/vm/code/codeBlob.hpp @ 1663:7139e81efd2d
6970566: runThese fails with SIGSEGV
Reviewed-by: kvn
| author | never |
|---|---|
| date | Thu, 22 Jul 2010 15:29:22 -0700 |
| parents | e9ff18c4ace7 |
| children | 126ea7725993 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1998, 2010, 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 | |
| 25 // CodeBlob - superclass for all entries in the CodeCache. | |
| 26 // | |
| 27 // Suptypes are: | |
| 28 // nmethod : Compiled Java methods (include method that calls to native code) | |
| 29 // RuntimeStub : Call to VM runtime methods | |
| 30 // DeoptimizationBlob : Used for deoptimizatation | |
| 31 // ExceptionBlob : Used for stack unrolling | |
| 32 // SafepointBlob : Used to handle illegal instruction exceptions | |
| 33 // | |
| 34 // | |
| 35 // Layout: | |
| 36 // - header | |
| 37 // - relocation | |
| 38 // - instruction space | |
| 39 // - data space | |
| 40 class DeoptimizationBlob; | |
| 41 | |
| 42 class CodeBlob VALUE_OBJ_CLASS_SPEC { | |
| 43 | |
| 44 friend class VMStructs; | |
| 45 | |
| 46 private: | |
| 47 const char* _name; | |
| 48 int _size; // total size of CodeBlob in bytes | |
| 49 int _header_size; // size of header (depends on subclass) | |
| 50 int _relocation_size; // size of relocation | |
| 51 int _instructions_offset; // offset to where instructions region begins | |
| 52 int _frame_complete_offset; // instruction offsets in [0.._frame_complete_offset) have | |
| 53 // not finished setting up their frame. Beware of pc's in | |
| 54 // that range. There is a similar range(s) on returns | |
| 55 // which we don't detect. | |
| 56 int _data_offset; // offset to where data region begins | |
| 57 int _frame_size; // size of stack frame | |
| 58 OopMapSet* _oop_maps; // OopMap for this CodeBlob | |
| 59 CodeComments _comments; | |
| 60 | |
| 61 friend class OopRecorder; | |
| 62 | |
| 63 public: | |
| 64 // Returns the space needed for CodeBlob | |
| 65 static unsigned int allocation_size(CodeBuffer* cb, int header_size); | |
| 66 | |
| 67 // Creation | |
| 68 // a) simple CodeBlob | |
| 69 // frame_complete is the offset from the beginning of the instructions | |
| 70 // to where the frame setup (from stackwalk viewpoint) is complete. | |
| 71 CodeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size); | |
| 72 | |
| 73 // b) full CodeBlob | |
| 74 CodeBlob( | |
| 75 const char* name, | |
| 76 CodeBuffer* cb, | |
| 77 int header_size, | |
| 78 int size, | |
| 79 int frame_complete, | |
| 80 int frame_size, | |
| 81 OopMapSet* oop_maps | |
| 82 ); | |
| 83 | |
| 84 // Deletion | |
| 85 void flush(); | |
| 86 | |
| 87 // Typing | |
|
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88 virtual bool is_buffer_blob() const { return false; } |
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89 virtual bool is_nmethod() const { return false; } |
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90 virtual bool is_runtime_stub() const { return false; } |
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91 virtual bool is_deoptimization_stub() const { return false; } |
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92 virtual bool is_uncommon_trap_stub() const { return false; } |
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93 virtual bool is_exception_stub() const { return false; } |
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94 virtual bool is_safepoint_stub() const { return false; } |
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95 virtual bool is_adapter_blob() const { return false; } |
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96 virtual bool is_method_handles_adapter_blob() const { return false; } |
| 0 | 97 |
| 98 virtual bool is_compiled_by_c2() const { return false; } | |
| 99 virtual bool is_compiled_by_c1() const { return false; } | |
| 100 | |
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101 // Casting |
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102 nmethod* as_nmethod_or_null() { return is_nmethod() ? (nmethod*) this : NULL; } |
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103 |
| 0 | 104 // Boundaries |
| 105 address header_begin() const { return (address) this; } | |
| 106 address header_end() const { return ((address) this) + _header_size; }; | |
| 107 relocInfo* relocation_begin() const { return (relocInfo*) header_end(); }; | |
| 108 relocInfo* relocation_end() const { return (relocInfo*)(header_end() + _relocation_size); } | |
| 109 address instructions_begin() const { return (address) header_begin() + _instructions_offset; } | |
| 110 address instructions_end() const { return (address) header_begin() + _data_offset; } | |
| 111 address data_begin() const { return (address) header_begin() + _data_offset; } | |
| 112 address data_end() const { return (address) header_begin() + _size; } | |
| 113 | |
| 114 // Offsets | |
| 115 int relocation_offset() const { return _header_size; } | |
| 116 int instructions_offset() const { return _instructions_offset; } | |
| 117 int data_offset() const { return _data_offset; } | |
| 118 | |
| 119 // Sizes | |
| 120 int size() const { return _size; } | |
| 121 int header_size() const { return _header_size; } | |
| 122 int relocation_size() const { return (address) relocation_end() - (address) relocation_begin(); } | |
| 123 int instructions_size() const { return instructions_end() - instructions_begin(); } | |
| 124 int data_size() const { return data_end() - data_begin(); } | |
| 125 | |
| 126 // Containment | |
| 127 bool blob_contains(address addr) const { return header_begin() <= addr && addr < data_end(); } | |
| 128 bool relocation_contains(relocInfo* addr) const{ return relocation_begin() <= addr && addr < relocation_end(); } | |
| 129 bool instructions_contains(address addr) const { return instructions_begin() <= addr && addr < instructions_end(); } | |
| 130 bool data_contains(address addr) const { return data_begin() <= addr && addr < data_end(); } | |
| 131 bool contains(address addr) const { return instructions_contains(addr); } | |
| 132 bool is_frame_complete_at(address addr) const { return instructions_contains(addr) && | |
| 133 addr >= instructions_begin() + _frame_complete_offset; } | |
| 134 | |
| 135 // CodeCache support: really only used by the nmethods, but in order to get | |
| 136 // asserts and certain bookkeeping to work in the CodeCache they are defined | |
| 137 // virtual here. | |
| 138 virtual bool is_zombie() const { return false; } | |
| 139 virtual bool is_locked_by_vm() const { return false; } | |
| 140 | |
| 141 virtual bool is_unloaded() const { return false; } | |
| 142 virtual bool is_not_entrant() const { return false; } | |
| 143 | |
| 144 // GC support | |
| 145 virtual bool is_alive() const = 0; | |
| 146 | |
| 147 // OopMap for frame | |
| 148 OopMapSet* oop_maps() const { return _oop_maps; } | |
| 149 void set_oop_maps(OopMapSet* p); | |
| 150 OopMap* oop_map_for_return_address(address return_address); | |
| 151 virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { ShouldNotReachHere(); } | |
| 152 | |
| 153 // Frame support | |
| 154 int frame_size() const { return _frame_size; } | |
| 155 void set_frame_size(int size) { _frame_size = size; } | |
| 156 | |
| 157 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments | |
| 158 virtual bool caller_must_gc_arguments(JavaThread* thread) const { return false; } | |
| 159 | |
| 160 // Naming | |
| 161 const char* name() const { return _name; } | |
| 162 void set_name(const char* name) { _name = name; } | |
| 163 | |
| 164 // Debugging | |
| 165 virtual void verify(); | |
| 166 virtual void print() const PRODUCT_RETURN; | |
| 167 virtual void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
| 168 | |
| 169 // Print the comment associated with offset on stream, if there is one | |
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170 virtual void print_block_comment(outputStream* stream, address block_begin) { |
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171 intptr_t offset = (intptr_t)(block_begin - instructions_begin()); |
| 0 | 172 _comments.print_block_comment(stream, offset); |
| 173 } | |
| 174 | |
| 175 // Transfer ownership of comments to this CodeBlob | |
| 176 void set_comments(CodeComments& comments) { | |
| 177 _comments.assign(comments); | |
| 178 } | |
| 179 }; | |
| 180 | |
| 181 | |
| 182 //---------------------------------------------------------------------------------------------------- | |
| 183 // BufferBlob: used to hold non-relocatable machine code such as the interpreter, stubroutines, etc. | |
| 184 | |
| 185 class BufferBlob: public CodeBlob { | |
| 186 friend class VMStructs; | |
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187 friend class AdapterBlob; |
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188 friend class MethodHandlesAdapterBlob; |
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189 |
| 0 | 190 private: |
| 191 // Creation support | |
| 192 BufferBlob(const char* name, int size); | |
| 193 BufferBlob(const char* name, int size, CodeBuffer* cb); | |
| 194 | |
| 195 void* operator new(size_t s, unsigned size); | |
| 196 | |
| 197 public: | |
| 198 // Creation | |
| 199 static BufferBlob* create(const char* name, int buffer_size); | |
| 200 static BufferBlob* create(const char* name, CodeBuffer* cb); | |
| 201 | |
| 202 static void free(BufferBlob* buf); | |
| 203 | |
| 204 // Typing | |
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205 virtual bool is_buffer_blob() const { return true; } |
| 0 | 206 |
| 207 // GC/Verification support | |
| 208 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } | |
| 209 bool is_alive() const { return true; } | |
| 210 | |
| 211 void verify(); | |
| 212 void print() const PRODUCT_RETURN; | |
| 213 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
| 214 }; | |
| 215 | |
| 216 | |
| 217 //---------------------------------------------------------------------------------------------------- | |
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218 // AdapterBlob: used to hold C2I/I2C adapters |
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219 |
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220 class AdapterBlob: public BufferBlob { |
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221 private: |
| 1663 | 222 AdapterBlob(int size, CodeBuffer* cb); |
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223 |
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224 public: |
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225 // Creation |
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226 static AdapterBlob* create(CodeBuffer* cb); |
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227 |
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228 // Typing |
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229 virtual bool is_adapter_blob() const { return true; } |
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230 }; |
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231 |
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232 |
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233 //---------------------------------------------------------------------------------------------------- |
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234 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters |
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235 |
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236 class MethodHandlesAdapterBlob: public BufferBlob { |
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237 private: |
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238 MethodHandlesAdapterBlob(int size) : BufferBlob("MethodHandles adapters", size) {} |
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239 MethodHandlesAdapterBlob(int size, CodeBuffer* cb) : BufferBlob("MethodHandles adapters", size, cb) {} |
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240 |
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241 public: |
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242 // Creation |
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243 static MethodHandlesAdapterBlob* create(int buffer_size); |
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244 |
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245 // Typing |
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246 virtual bool is_method_handles_adapter_blob() const { return true; } |
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247 }; |
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248 |
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249 |
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250 //---------------------------------------------------------------------------------------------------- |
| 0 | 251 // RuntimeStub: describes stubs used by compiled code to call a (static) C++ runtime routine |
| 252 | |
| 253 class RuntimeStub: public CodeBlob { | |
| 254 friend class VMStructs; | |
| 255 private: | |
| 256 bool _caller_must_gc_arguments; | |
| 257 | |
| 258 // Creation support | |
| 259 RuntimeStub( | |
| 260 const char* name, | |
| 261 CodeBuffer* cb, | |
| 262 int size, | |
| 263 int frame_complete, | |
| 264 int frame_size, | |
| 265 OopMapSet* oop_maps, | |
| 266 bool caller_must_gc_arguments | |
| 267 ); | |
| 268 | |
| 269 void* operator new(size_t s, unsigned size); | |
| 270 | |
| 271 public: | |
| 272 // Creation | |
| 273 static RuntimeStub* new_runtime_stub( | |
| 274 const char* stub_name, | |
| 275 CodeBuffer* cb, | |
| 276 int frame_complete, | |
| 277 int frame_size, | |
| 278 OopMapSet* oop_maps, | |
| 279 bool caller_must_gc_arguments | |
| 280 ); | |
| 281 | |
| 282 // Typing | |
| 283 bool is_runtime_stub() const { return true; } | |
| 284 | |
| 285 // GC support | |
| 286 bool caller_must_gc_arguments(JavaThread* thread) const { return _caller_must_gc_arguments; } | |
| 287 | |
| 288 address entry_point() { return instructions_begin(); } | |
| 289 | |
| 290 // GC/Verification support | |
| 291 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ } | |
| 292 bool is_alive() const { return true; } | |
| 293 | |
| 294 void verify(); | |
| 295 void print() const PRODUCT_RETURN; | |
| 296 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
| 297 }; | |
| 298 | |
| 299 | |
| 300 //---------------------------------------------------------------------------------------------------- | |
| 301 // Super-class for all blobs that exist in only one instance. Implements default behaviour. | |
| 302 | |
| 303 class SingletonBlob: public CodeBlob { | |
| 304 friend class VMStructs; | |
| 305 public: | |
| 306 SingletonBlob( | |
| 307 const char* name, | |
| 308 CodeBuffer* cb, | |
| 309 int header_size, | |
| 310 int size, | |
| 311 int frame_size, | |
| 312 OopMapSet* oop_maps | |
| 313 ) | |
| 314 : CodeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, frame_size, oop_maps) | |
| 315 {}; | |
| 316 | |
| 317 bool is_alive() const { return true; } | |
| 318 | |
| 319 void verify(); // does nothing | |
| 320 void print() const PRODUCT_RETURN; | |
| 321 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
| 322 }; | |
| 323 | |
| 324 | |
| 325 //---------------------------------------------------------------------------------------------------- | |
| 326 // DeoptimizationBlob | |
| 327 | |
| 328 class DeoptimizationBlob: public SingletonBlob { | |
| 329 friend class VMStructs; | |
| 330 private: | |
| 331 int _unpack_offset; | |
| 332 int _unpack_with_exception; | |
| 333 int _unpack_with_reexecution; | |
| 334 | |
| 335 int _unpack_with_exception_in_tls; | |
| 336 | |
| 337 // Creation support | |
| 338 DeoptimizationBlob( | |
| 339 CodeBuffer* cb, | |
| 340 int size, | |
| 341 OopMapSet* oop_maps, | |
| 342 int unpack_offset, | |
| 343 int unpack_with_exception_offset, | |
| 344 int unpack_with_reexecution_offset, | |
| 345 int frame_size | |
| 346 ); | |
| 347 | |
| 348 void* operator new(size_t s, unsigned size); | |
| 349 | |
| 350 public: | |
| 351 // Creation | |
| 352 static DeoptimizationBlob* create( | |
| 353 CodeBuffer* cb, | |
| 354 OopMapSet* oop_maps, | |
| 355 int unpack_offset, | |
| 356 int unpack_with_exception_offset, | |
| 357 int unpack_with_reexecution_offset, | |
| 358 int frame_size | |
| 359 ); | |
| 360 | |
| 361 // Typing | |
| 362 bool is_deoptimization_stub() const { return true; } | |
| 363 const DeoptimizationBlob *as_deoptimization_stub() const { return this; } | |
| 364 bool exception_address_is_unpack_entry(address pc) const { | |
| 365 address unpack_pc = unpack(); | |
| 366 return (pc == unpack_pc || (pc + frame::pc_return_offset) == unpack_pc); | |
| 367 } | |
| 368 | |
| 369 | |
| 370 | |
| 371 | |
| 372 // GC for args | |
| 373 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ } | |
| 374 | |
| 375 // Printing | |
| 376 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
| 377 | |
| 378 address unpack() const { return instructions_begin() + _unpack_offset; } | |
| 379 address unpack_with_exception() const { return instructions_begin() + _unpack_with_exception; } | |
| 380 address unpack_with_reexecution() const { return instructions_begin() + _unpack_with_reexecution; } | |
| 381 | |
| 382 // Alternate entry point for C1 where the exception and issuing pc | |
| 383 // are in JavaThread::_exception_oop and JavaThread::_exception_pc | |
| 384 // instead of being in registers. This is needed because C1 doesn't | |
| 385 // model exception paths in a way that keeps these registers free so | |
| 386 // there may be live values in those registers during deopt. | |
| 387 void set_unpack_with_exception_in_tls_offset(int offset) { | |
| 388 _unpack_with_exception_in_tls = offset; | |
| 389 assert(contains(instructions_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob"); | |
| 390 } | |
| 391 address unpack_with_exception_in_tls() const { return instructions_begin() + _unpack_with_exception_in_tls; } | |
| 392 }; | |
| 393 | |
| 394 | |
| 395 //---------------------------------------------------------------------------------------------------- | |
| 396 // UncommonTrapBlob (currently only used by Compiler 2) | |
| 397 | |
| 398 #ifdef COMPILER2 | |
| 399 | |
| 400 class UncommonTrapBlob: public SingletonBlob { | |
| 401 friend class VMStructs; | |
| 402 private: | |
| 403 // Creation support | |
| 404 UncommonTrapBlob( | |
| 405 CodeBuffer* cb, | |
| 406 int size, | |
| 407 OopMapSet* oop_maps, | |
| 408 int frame_size | |
| 409 ); | |
| 410 | |
| 411 void* operator new(size_t s, unsigned size); | |
| 412 | |
| 413 public: | |
| 414 // Creation | |
| 415 static UncommonTrapBlob* create( | |
| 416 CodeBuffer* cb, | |
| 417 OopMapSet* oop_maps, | |
| 418 int frame_size | |
| 419 ); | |
| 420 | |
| 421 // GC for args | |
| 422 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* nothing to do */ } | |
| 423 | |
| 424 // Typing | |
| 425 bool is_uncommon_trap_stub() const { return true; } | |
| 426 }; | |
| 427 | |
| 428 | |
| 429 //---------------------------------------------------------------------------------------------------- | |
| 430 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2) | |
| 431 | |
| 432 class ExceptionBlob: public SingletonBlob { | |
| 433 friend class VMStructs; | |
| 434 private: | |
| 435 // Creation support | |
| 436 ExceptionBlob( | |
| 437 CodeBuffer* cb, | |
| 438 int size, | |
| 439 OopMapSet* oop_maps, | |
| 440 int frame_size | |
| 441 ); | |
| 442 | |
| 443 void* operator new(size_t s, unsigned size); | |
| 444 | |
| 445 public: | |
| 446 // Creation | |
| 447 static ExceptionBlob* create( | |
| 448 CodeBuffer* cb, | |
| 449 OopMapSet* oop_maps, | |
| 450 int frame_size | |
| 451 ); | |
| 452 | |
| 453 // GC for args | |
| 454 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } | |
| 455 | |
| 456 // Typing | |
| 457 bool is_exception_stub() const { return true; } | |
| 458 }; | |
| 459 #endif // COMPILER2 | |
| 460 | |
| 461 | |
| 462 //---------------------------------------------------------------------------------------------------- | |
| 463 // SafepointBlob: handles illegal_instruction exceptions during a safepoint | |
| 464 | |
| 465 class SafepointBlob: public SingletonBlob { | |
| 466 friend class VMStructs; | |
| 467 private: | |
| 468 // Creation support | |
| 469 SafepointBlob( | |
| 470 CodeBuffer* cb, | |
| 471 int size, | |
| 472 OopMapSet* oop_maps, | |
| 473 int frame_size | |
| 474 ); | |
| 475 | |
| 476 void* operator new(size_t s, unsigned size); | |
| 477 | |
| 478 public: | |
| 479 // Creation | |
| 480 static SafepointBlob* create( | |
| 481 CodeBuffer* cb, | |
| 482 OopMapSet* oop_maps, | |
| 483 int frame_size | |
| 484 ); | |
| 485 | |
| 486 // GC for args | |
| 487 void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) { /* nothing to do */ } | |
| 488 | |
| 489 // Typing | |
| 490 bool is_safepoint_stub() const { return true; } | |
| 491 }; |