Tue, 08 Aug 2017 15:57:29 +0800
merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #ifndef SHARE_VM_CODE_NMETHOD_HPP |
aoqi@0 | 26 | #define SHARE_VM_CODE_NMETHOD_HPP |
aoqi@0 | 27 | |
aoqi@0 | 28 | #include "code/codeBlob.hpp" |
aoqi@0 | 29 | #include "code/pcDesc.hpp" |
aoqi@0 | 30 | #include "oops/metadata.hpp" |
aoqi@0 | 31 | |
aoqi@0 | 32 | // This class is used internally by nmethods, to cache |
aoqi@0 | 33 | // exception/pc/handler information. |
aoqi@0 | 34 | |
aoqi@0 | 35 | class ExceptionCache : public CHeapObj<mtCode> { |
aoqi@0 | 36 | friend class VMStructs; |
aoqi@0 | 37 | private: |
aoqi@0 | 38 | enum { cache_size = 16 }; |
aoqi@0 | 39 | Klass* _exception_type; |
aoqi@0 | 40 | address _pc[cache_size]; |
aoqi@0 | 41 | address _handler[cache_size]; |
aoqi@0 | 42 | int _count; |
aoqi@0 | 43 | ExceptionCache* _next; |
aoqi@0 | 44 | |
aoqi@0 | 45 | address pc_at(int index) { assert(index >= 0 && index < count(),""); return _pc[index]; } |
aoqi@0 | 46 | void set_pc_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _pc[index] = a; } |
aoqi@0 | 47 | address handler_at(int index) { assert(index >= 0 && index < count(),""); return _handler[index]; } |
aoqi@0 | 48 | void set_handler_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _handler[index] = a; } |
aoqi@0 | 49 | int count() { return _count; } |
aoqi@0 | 50 | void increment_count() { _count++; } |
aoqi@0 | 51 | |
aoqi@0 | 52 | public: |
aoqi@0 | 53 | |
aoqi@0 | 54 | ExceptionCache(Handle exception, address pc, address handler); |
aoqi@0 | 55 | |
aoqi@0 | 56 | Klass* exception_type() { return _exception_type; } |
aoqi@0 | 57 | ExceptionCache* next() { return _next; } |
aoqi@0 | 58 | void set_next(ExceptionCache *ec) { _next = ec; } |
aoqi@0 | 59 | |
aoqi@0 | 60 | address match(Handle exception, address pc); |
aoqi@0 | 61 | bool match_exception_with_space(Handle exception) ; |
aoqi@0 | 62 | address test_address(address addr); |
aoqi@0 | 63 | bool add_address_and_handler(address addr, address handler) ; |
aoqi@0 | 64 | }; |
aoqi@0 | 65 | |
aoqi@0 | 66 | |
aoqi@0 | 67 | // cache pc descs found in earlier inquiries |
aoqi@0 | 68 | class PcDescCache VALUE_OBJ_CLASS_SPEC { |
aoqi@0 | 69 | friend class VMStructs; |
aoqi@0 | 70 | private: |
aoqi@0 | 71 | enum { cache_size = 4 }; |
aoqi@0 | 72 | PcDesc* _pc_descs[cache_size]; // last cache_size pc_descs found |
aoqi@0 | 73 | public: |
aoqi@0 | 74 | PcDescCache() { debug_only(_pc_descs[0] = NULL); } |
aoqi@0 | 75 | void reset_to(PcDesc* initial_pc_desc); |
aoqi@0 | 76 | PcDesc* find_pc_desc(int pc_offset, bool approximate); |
aoqi@0 | 77 | void add_pc_desc(PcDesc* pc_desc); |
aoqi@0 | 78 | PcDesc* last_pc_desc() { return _pc_descs[0]; } |
aoqi@0 | 79 | }; |
aoqi@0 | 80 | |
aoqi@0 | 81 | |
aoqi@0 | 82 | // nmethods (native methods) are the compiled code versions of Java methods. |
aoqi@0 | 83 | // |
aoqi@0 | 84 | // An nmethod contains: |
aoqi@0 | 85 | // - header (the nmethod structure) |
aoqi@0 | 86 | // [Relocation] |
aoqi@0 | 87 | // - relocation information |
aoqi@0 | 88 | // - constant part (doubles, longs and floats used in nmethod) |
aoqi@0 | 89 | // - oop table |
aoqi@0 | 90 | // [Code] |
aoqi@0 | 91 | // - code body |
aoqi@0 | 92 | // - exception handler |
aoqi@0 | 93 | // - stub code |
aoqi@0 | 94 | // [Debugging information] |
aoqi@0 | 95 | // - oop array |
aoqi@0 | 96 | // - data array |
aoqi@0 | 97 | // - pcs |
aoqi@0 | 98 | // [Exception handler table] |
aoqi@0 | 99 | // - handler entry point array |
aoqi@0 | 100 | // [Implicit Null Pointer exception table] |
aoqi@0 | 101 | // - implicit null table array |
aoqi@0 | 102 | |
aoqi@0 | 103 | class Dependencies; |
aoqi@0 | 104 | class ExceptionHandlerTable; |
aoqi@0 | 105 | class ImplicitExceptionTable; |
aoqi@0 | 106 | class AbstractCompiler; |
aoqi@0 | 107 | class xmlStream; |
aoqi@0 | 108 | |
aoqi@0 | 109 | class nmethod : public CodeBlob { |
aoqi@0 | 110 | friend class VMStructs; |
aoqi@0 | 111 | friend class NMethodSweeper; |
aoqi@0 | 112 | friend class CodeCache; // scavengable oops |
aoqi@0 | 113 | private: |
aoqi@0 | 114 | // Shared fields for all nmethod's |
aoqi@0 | 115 | Method* _method; |
aoqi@0 | 116 | int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method |
aoqi@0 | 117 | jmethodID _jmethod_id; // Cache of method()->jmethod_id() |
aoqi@0 | 118 | |
aoqi@0 | 119 | // To support simple linked-list chaining of nmethods: |
aoqi@0 | 120 | nmethod* _osr_link; // from InstanceKlass::osr_nmethods_head |
aoqi@0 | 121 | nmethod* _scavenge_root_link; // from CodeCache::scavenge_root_nmethods |
aoqi@0 | 122 | |
aoqi@0 | 123 | static nmethod* volatile _oops_do_mark_nmethods; |
aoqi@0 | 124 | nmethod* volatile _oops_do_mark_link; |
aoqi@0 | 125 | |
aoqi@0 | 126 | AbstractCompiler* _compiler; // The compiler which compiled this nmethod |
aoqi@0 | 127 | |
aoqi@0 | 128 | // offsets for entry points |
aoqi@0 | 129 | address _entry_point; // entry point with class check |
aoqi@0 | 130 | address _verified_entry_point; // entry point without class check |
aoqi@0 | 131 | address _osr_entry_point; // entry point for on stack replacement |
aoqi@0 | 132 | |
aoqi@0 | 133 | // Offsets for different nmethod parts |
aoqi@0 | 134 | int _exception_offset; |
aoqi@0 | 135 | // All deoptee's will resume execution at this location described by |
aoqi@0 | 136 | // this offset. |
aoqi@0 | 137 | int _deoptimize_offset; |
aoqi@0 | 138 | // All deoptee's at a MethodHandle call site will resume execution |
aoqi@0 | 139 | // at this location described by this offset. |
aoqi@0 | 140 | int _deoptimize_mh_offset; |
aoqi@0 | 141 | // Offset of the unwind handler if it exists |
aoqi@0 | 142 | int _unwind_handler_offset; |
aoqi@0 | 143 | |
aoqi@0 | 144 | #ifdef HAVE_DTRACE_H |
aoqi@0 | 145 | int _trap_offset; |
aoqi@0 | 146 | #endif // def HAVE_DTRACE_H |
aoqi@0 | 147 | int _consts_offset; |
aoqi@0 | 148 | int _stub_offset; |
aoqi@0 | 149 | int _oops_offset; // offset to where embedded oop table begins (inside data) |
aoqi@0 | 150 | int _metadata_offset; // embedded meta data table |
aoqi@0 | 151 | int _scopes_data_offset; |
aoqi@0 | 152 | int _scopes_pcs_offset; |
aoqi@0 | 153 | int _dependencies_offset; |
aoqi@0 | 154 | int _handler_table_offset; |
aoqi@0 | 155 | int _nul_chk_table_offset; |
aoqi@0 | 156 | int _nmethod_end_offset; |
aoqi@0 | 157 | |
aoqi@0 | 158 | // location in frame (offset for sp) that deopt can store the original |
aoqi@0 | 159 | // pc during a deopt. |
aoqi@0 | 160 | int _orig_pc_offset; |
aoqi@0 | 161 | |
aoqi@0 | 162 | int _compile_id; // which compilation made this nmethod |
aoqi@0 | 163 | int _comp_level; // compilation level |
aoqi@0 | 164 | |
aoqi@0 | 165 | // protected by CodeCache_lock |
aoqi@0 | 166 | bool _has_flushed_dependencies; // Used for maintenance of dependencies (CodeCache_lock) |
aoqi@0 | 167 | |
aoqi@0 | 168 | bool _marked_for_reclamation; // Used by NMethodSweeper (set only by sweeper) |
aoqi@0 | 169 | bool _marked_for_deoptimization; // Used for stack deoptimization |
aoqi@0 | 170 | |
aoqi@0 | 171 | // used by jvmti to track if an unload event has been posted for this nmethod. |
aoqi@0 | 172 | bool _unload_reported; |
aoqi@0 | 173 | |
aoqi@0 | 174 | // set during construction |
aoqi@0 | 175 | unsigned int _has_unsafe_access:1; // May fault due to unsafe access. |
aoqi@0 | 176 | unsigned int _has_method_handle_invokes:1; // Has this method MethodHandle invokes? |
aoqi@0 | 177 | unsigned int _lazy_critical_native:1; // Lazy JNI critical native |
aoqi@0 | 178 | unsigned int _has_wide_vectors:1; // Preserve wide vectors at safepoints |
aoqi@0 | 179 | |
aoqi@0 | 180 | // Protected by Patching_lock |
aoqi@0 | 181 | volatile unsigned char _state; // {alive, not_entrant, zombie, unloaded} |
aoqi@0 | 182 | |
aoqi@0 | 183 | #ifdef ASSERT |
aoqi@0 | 184 | bool _oops_are_stale; // indicates that it's no longer safe to access oops section |
aoqi@0 | 185 | #endif |
aoqi@0 | 186 | |
aoqi@0 | 187 | enum { in_use = 0, // executable nmethod |
aoqi@0 | 188 | not_entrant = 1, // marked for deoptimization but activations may still exist, |
aoqi@0 | 189 | // will be transformed to zombie when all activations are gone |
aoqi@0 | 190 | zombie = 2, // no activations exist, nmethod is ready for purge |
aoqi@0 | 191 | unloaded = 3 }; // there should be no activations, should not be called, |
aoqi@0 | 192 | // will be transformed to zombie immediately |
aoqi@0 | 193 | |
aoqi@0 | 194 | jbyte _scavenge_root_state; |
aoqi@0 | 195 | |
aoqi@0 | 196 | #if INCLUDE_RTM_OPT |
aoqi@0 | 197 | // RTM state at compile time. Used during deoptimization to decide |
aoqi@0 | 198 | // whether to restart collecting RTM locking abort statistic again. |
aoqi@0 | 199 | RTMState _rtm_state; |
aoqi@0 | 200 | #endif |
aoqi@0 | 201 | |
aoqi@0 | 202 | // Nmethod Flushing lock. If non-zero, then the nmethod is not removed |
aoqi@0 | 203 | // and is not made into a zombie. However, once the nmethod is made into |
aoqi@0 | 204 | // a zombie, it will be locked one final time if CompiledMethodUnload |
aoqi@0 | 205 | // event processing needs to be done. |
aoqi@0 | 206 | jint _lock_count; |
aoqi@0 | 207 | |
aoqi@0 | 208 | // not_entrant method removal. Each mark_sweep pass will update |
aoqi@0 | 209 | // this mark to current sweep invocation count if it is seen on the |
aoqi@0 | 210 | // stack. An not_entrant method can be removed when there are no |
aoqi@0 | 211 | // more activations, i.e., when the _stack_traversal_mark is less than |
aoqi@0 | 212 | // current sweep traversal index. |
aoqi@0 | 213 | long _stack_traversal_mark; |
aoqi@0 | 214 | |
aoqi@0 | 215 | // The _hotness_counter indicates the hotness of a method. The higher |
aoqi@0 | 216 | // the value the hotter the method. The hotness counter of a nmethod is |
aoqi@0 | 217 | // set to [(ReservedCodeCacheSize / (1024 * 1024)) * 2] each time the method |
aoqi@0 | 218 | // is active while stack scanning (mark_active_nmethods()). The hotness |
aoqi@0 | 219 | // counter is decreased (by 1) while sweeping. |
aoqi@0 | 220 | int _hotness_counter; |
aoqi@0 | 221 | |
aoqi@0 | 222 | ExceptionCache *_exception_cache; |
aoqi@0 | 223 | PcDescCache _pc_desc_cache; |
aoqi@0 | 224 | |
aoqi@0 | 225 | // These are used for compiled synchronized native methods to |
aoqi@0 | 226 | // locate the owner and stack slot for the BasicLock so that we can |
aoqi@0 | 227 | // properly revoke the bias of the owner if necessary. They are |
aoqi@0 | 228 | // needed because there is no debug information for compiled native |
aoqi@0 | 229 | // wrappers and the oop maps are insufficient to allow |
aoqi@0 | 230 | // frame::retrieve_receiver() to work. Currently they are expected |
aoqi@0 | 231 | // to be byte offsets from the Java stack pointer for maximum code |
aoqi@0 | 232 | // sharing between platforms. Note that currently biased locking |
aoqi@0 | 233 | // will never cause Class instances to be biased but this code |
aoqi@0 | 234 | // handles the static synchronized case as well. |
aoqi@0 | 235 | // JVMTI's GetLocalInstance() also uses these offsets to find the receiver |
aoqi@0 | 236 | // for non-static native wrapper frames. |
aoqi@0 | 237 | ByteSize _native_receiver_sp_offset; |
aoqi@0 | 238 | ByteSize _native_basic_lock_sp_offset; |
aoqi@0 | 239 | |
aoqi@0 | 240 | friend class nmethodLocker; |
aoqi@0 | 241 | |
aoqi@0 | 242 | // For native wrappers |
aoqi@0 | 243 | nmethod(Method* method, |
aoqi@0 | 244 | int nmethod_size, |
aoqi@0 | 245 | int compile_id, |
aoqi@0 | 246 | CodeOffsets* offsets, |
aoqi@0 | 247 | CodeBuffer *code_buffer, |
aoqi@0 | 248 | int frame_size, |
aoqi@0 | 249 | ByteSize basic_lock_owner_sp_offset, /* synchronized natives only */ |
aoqi@0 | 250 | ByteSize basic_lock_sp_offset, /* synchronized natives only */ |
aoqi@0 | 251 | OopMapSet* oop_maps); |
aoqi@0 | 252 | |
aoqi@0 | 253 | #ifdef HAVE_DTRACE_H |
aoqi@0 | 254 | // For native wrappers |
aoqi@0 | 255 | nmethod(Method* method, |
aoqi@0 | 256 | int nmethod_size, |
aoqi@0 | 257 | CodeOffsets* offsets, |
aoqi@0 | 258 | CodeBuffer *code_buffer, |
aoqi@0 | 259 | int frame_size); |
aoqi@0 | 260 | #endif // def HAVE_DTRACE_H |
aoqi@0 | 261 | |
aoqi@0 | 262 | // Creation support |
aoqi@0 | 263 | nmethod(Method* method, |
aoqi@0 | 264 | int nmethod_size, |
aoqi@0 | 265 | int compile_id, |
aoqi@0 | 266 | int entry_bci, |
aoqi@0 | 267 | CodeOffsets* offsets, |
aoqi@0 | 268 | int orig_pc_offset, |
aoqi@0 | 269 | DebugInformationRecorder *recorder, |
aoqi@0 | 270 | Dependencies* dependencies, |
aoqi@0 | 271 | CodeBuffer *code_buffer, |
aoqi@0 | 272 | int frame_size, |
aoqi@0 | 273 | OopMapSet* oop_maps, |
aoqi@0 | 274 | ExceptionHandlerTable* handler_table, |
aoqi@0 | 275 | ImplicitExceptionTable* nul_chk_table, |
aoqi@0 | 276 | AbstractCompiler* compiler, |
aoqi@0 | 277 | int comp_level); |
aoqi@0 | 278 | |
aoqi@0 | 279 | // helper methods |
aoqi@0 | 280 | void* operator new(size_t size, int nmethod_size) throw(); |
aoqi@0 | 281 | |
aoqi@0 | 282 | const char* reloc_string_for(u_char* begin, u_char* end); |
aoqi@0 | 283 | // Returns true if this thread changed the state of the nmethod or |
aoqi@0 | 284 | // false if another thread performed the transition. |
aoqi@0 | 285 | bool make_not_entrant_or_zombie(unsigned int state); |
aoqi@0 | 286 | void inc_decompile_count(); |
aoqi@0 | 287 | |
aoqi@0 | 288 | // Used to manipulate the exception cache |
aoqi@0 | 289 | void add_exception_cache_entry(ExceptionCache* new_entry); |
aoqi@0 | 290 | ExceptionCache* exception_cache_entry_for_exception(Handle exception); |
aoqi@0 | 291 | |
aoqi@0 | 292 | // Inform external interfaces that a compiled method has been unloaded |
aoqi@0 | 293 | void post_compiled_method_unload(); |
aoqi@0 | 294 | |
aoqi@0 | 295 | // Initailize fields to their default values |
aoqi@0 | 296 | void init_defaults(); |
aoqi@0 | 297 | |
aoqi@0 | 298 | public: |
aoqi@0 | 299 | // create nmethod with entry_bci |
aoqi@0 | 300 | static nmethod* new_nmethod(methodHandle method, |
aoqi@0 | 301 | int compile_id, |
aoqi@0 | 302 | int entry_bci, |
aoqi@0 | 303 | CodeOffsets* offsets, |
aoqi@0 | 304 | int orig_pc_offset, |
aoqi@0 | 305 | DebugInformationRecorder* recorder, |
aoqi@0 | 306 | Dependencies* dependencies, |
aoqi@0 | 307 | CodeBuffer *code_buffer, |
aoqi@0 | 308 | int frame_size, |
aoqi@0 | 309 | OopMapSet* oop_maps, |
aoqi@0 | 310 | ExceptionHandlerTable* handler_table, |
aoqi@0 | 311 | ImplicitExceptionTable* nul_chk_table, |
aoqi@0 | 312 | AbstractCompiler* compiler, |
aoqi@0 | 313 | int comp_level); |
aoqi@0 | 314 | |
aoqi@0 | 315 | static nmethod* new_native_nmethod(methodHandle method, |
aoqi@0 | 316 | int compile_id, |
aoqi@0 | 317 | CodeBuffer *code_buffer, |
aoqi@0 | 318 | int vep_offset, |
aoqi@0 | 319 | int frame_complete, |
aoqi@0 | 320 | int frame_size, |
aoqi@0 | 321 | ByteSize receiver_sp_offset, |
aoqi@0 | 322 | ByteSize basic_lock_sp_offset, |
aoqi@0 | 323 | OopMapSet* oop_maps); |
aoqi@0 | 324 | |
aoqi@0 | 325 | #ifdef HAVE_DTRACE_H |
aoqi@0 | 326 | // The method we generate for a dtrace probe has to look |
aoqi@0 | 327 | // like an nmethod as far as the rest of the system is concerned |
aoqi@0 | 328 | // which is somewhat unfortunate. |
aoqi@0 | 329 | static nmethod* new_dtrace_nmethod(methodHandle method, |
aoqi@0 | 330 | CodeBuffer *code_buffer, |
aoqi@0 | 331 | int vep_offset, |
aoqi@0 | 332 | int trap_offset, |
aoqi@0 | 333 | int frame_complete, |
aoqi@0 | 334 | int frame_size); |
aoqi@0 | 335 | |
aoqi@0 | 336 | int trap_offset() const { return _trap_offset; } |
aoqi@0 | 337 | address trap_address() const { return insts_begin() + _trap_offset; } |
aoqi@0 | 338 | |
aoqi@0 | 339 | #endif // def HAVE_DTRACE_H |
aoqi@0 | 340 | |
aoqi@0 | 341 | // accessors |
aoqi@0 | 342 | Method* method() const { return _method; } |
aoqi@0 | 343 | AbstractCompiler* compiler() const { return _compiler; } |
aoqi@0 | 344 | |
aoqi@0 | 345 | // type info |
aoqi@0 | 346 | bool is_nmethod() const { return true; } |
aoqi@0 | 347 | bool is_java_method() const { return !method()->is_native(); } |
aoqi@0 | 348 | bool is_native_method() const { return method()->is_native(); } |
aoqi@0 | 349 | bool is_osr_method() const { return _entry_bci != InvocationEntryBci; } |
aoqi@0 | 350 | |
aoqi@0 | 351 | bool is_compiled_by_c1() const; |
aoqi@0 | 352 | bool is_compiled_by_c2() const; |
aoqi@0 | 353 | bool is_compiled_by_shark() const; |
aoqi@0 | 354 | |
aoqi@0 | 355 | // boundaries for different parts |
aoqi@0 | 356 | address consts_begin () const { return header_begin() + _consts_offset ; } |
aoqi@0 | 357 | address consts_end () const { return header_begin() + code_offset() ; } |
aoqi@0 | 358 | address insts_begin () const { return header_begin() + code_offset() ; } |
aoqi@0 | 359 | address insts_end () const { return header_begin() + _stub_offset ; } |
aoqi@0 | 360 | address stub_begin () const { return header_begin() + _stub_offset ; } |
aoqi@0 | 361 | address stub_end () const { return header_begin() + _oops_offset ; } |
aoqi@0 | 362 | address exception_begin () const { return header_begin() + _exception_offset ; } |
aoqi@0 | 363 | address deopt_handler_begin () const { return header_begin() + _deoptimize_offset ; } |
aoqi@0 | 364 | address deopt_mh_handler_begin() const { return header_begin() + _deoptimize_mh_offset ; } |
aoqi@0 | 365 | address unwind_handler_begin () const { return _unwind_handler_offset != -1 ? (header_begin() + _unwind_handler_offset) : NULL; } |
aoqi@0 | 366 | oop* oops_begin () const { return (oop*) (header_begin() + _oops_offset) ; } |
aoqi@0 | 367 | oop* oops_end () const { return (oop*) (header_begin() + _metadata_offset) ; } |
aoqi@0 | 368 | |
aoqi@0 | 369 | Metadata** metadata_begin () const { return (Metadata**) (header_begin() + _metadata_offset) ; } |
aoqi@0 | 370 | Metadata** metadata_end () const { return (Metadata**) (header_begin() + _scopes_data_offset) ; } |
aoqi@0 | 371 | |
aoqi@0 | 372 | address scopes_data_begin () const { return header_begin() + _scopes_data_offset ; } |
aoqi@0 | 373 | address scopes_data_end () const { return header_begin() + _scopes_pcs_offset ; } |
aoqi@0 | 374 | PcDesc* scopes_pcs_begin () const { return (PcDesc*)(header_begin() + _scopes_pcs_offset ); } |
aoqi@0 | 375 | PcDesc* scopes_pcs_end () const { return (PcDesc*)(header_begin() + _dependencies_offset) ; } |
aoqi@0 | 376 | address dependencies_begin () const { return header_begin() + _dependencies_offset ; } |
aoqi@0 | 377 | address dependencies_end () const { return header_begin() + _handler_table_offset ; } |
aoqi@0 | 378 | address handler_table_begin () const { return header_begin() + _handler_table_offset ; } |
aoqi@0 | 379 | address handler_table_end () const { return header_begin() + _nul_chk_table_offset ; } |
aoqi@0 | 380 | address nul_chk_table_begin () const { return header_begin() + _nul_chk_table_offset ; } |
aoqi@0 | 381 | address nul_chk_table_end () const { return header_begin() + _nmethod_end_offset ; } |
aoqi@0 | 382 | |
aoqi@0 | 383 | // Sizes |
aoqi@0 | 384 | int consts_size () const { return consts_end () - consts_begin (); } |
aoqi@0 | 385 | int insts_size () const { return insts_end () - insts_begin (); } |
aoqi@0 | 386 | int stub_size () const { return stub_end () - stub_begin (); } |
aoqi@0 | 387 | int oops_size () const { return (address) oops_end () - (address) oops_begin (); } |
aoqi@0 | 388 | int metadata_size () const { return (address) metadata_end () - (address) metadata_begin (); } |
aoqi@0 | 389 | int scopes_data_size () const { return scopes_data_end () - scopes_data_begin (); } |
aoqi@0 | 390 | int scopes_pcs_size () const { return (intptr_t) scopes_pcs_end () - (intptr_t) scopes_pcs_begin (); } |
aoqi@0 | 391 | int dependencies_size () const { return dependencies_end () - dependencies_begin (); } |
aoqi@0 | 392 | int handler_table_size() const { return handler_table_end() - handler_table_begin(); } |
aoqi@0 | 393 | int nul_chk_table_size() const { return nul_chk_table_end() - nul_chk_table_begin(); } |
aoqi@0 | 394 | |
aoqi@0 | 395 | int total_size () const; |
aoqi@0 | 396 | |
aoqi@0 | 397 | void dec_hotness_counter() { _hotness_counter--; } |
aoqi@0 | 398 | void set_hotness_counter(int val) { _hotness_counter = val; } |
aoqi@0 | 399 | int hotness_counter() const { return _hotness_counter; } |
aoqi@0 | 400 | |
aoqi@0 | 401 | // Containment |
aoqi@0 | 402 | bool consts_contains (address addr) const { return consts_begin () <= addr && addr < consts_end (); } |
aoqi@0 | 403 | bool insts_contains (address addr) const { return insts_begin () <= addr && addr < insts_end (); } |
aoqi@0 | 404 | bool stub_contains (address addr) const { return stub_begin () <= addr && addr < stub_end (); } |
aoqi@0 | 405 | bool oops_contains (oop* addr) const { return oops_begin () <= addr && addr < oops_end (); } |
aoqi@0 | 406 | bool metadata_contains (Metadata** addr) const { return metadata_begin () <= addr && addr < metadata_end (); } |
aoqi@0 | 407 | bool scopes_data_contains (address addr) const { return scopes_data_begin () <= addr && addr < scopes_data_end (); } |
aoqi@0 | 408 | bool scopes_pcs_contains (PcDesc* addr) const { return scopes_pcs_begin () <= addr && addr < scopes_pcs_end (); } |
aoqi@0 | 409 | bool handler_table_contains(address addr) const { return handler_table_begin() <= addr && addr < handler_table_end(); } |
aoqi@0 | 410 | bool nul_chk_table_contains(address addr) const { return nul_chk_table_begin() <= addr && addr < nul_chk_table_end(); } |
aoqi@0 | 411 | |
aoqi@0 | 412 | // entry points |
aoqi@0 | 413 | address entry_point() const { return _entry_point; } // normal entry point |
aoqi@0 | 414 | address verified_entry_point() const { return _verified_entry_point; } // if klass is correct |
aoqi@0 | 415 | |
aoqi@0 | 416 | // flag accessing and manipulation |
aoqi@0 | 417 | bool is_in_use() const { return _state == in_use; } |
aoqi@0 | 418 | bool is_alive() const { return _state == in_use || _state == not_entrant; } |
aoqi@0 | 419 | bool is_not_entrant() const { return _state == not_entrant; } |
aoqi@0 | 420 | bool is_zombie() const { return _state == zombie; } |
aoqi@0 | 421 | bool is_unloaded() const { return _state == unloaded; } |
aoqi@0 | 422 | |
aoqi@0 | 423 | #if INCLUDE_RTM_OPT |
aoqi@0 | 424 | // rtm state accessing and manipulating |
aoqi@0 | 425 | RTMState rtm_state() const { return _rtm_state; } |
aoqi@0 | 426 | void set_rtm_state(RTMState state) { _rtm_state = state; } |
aoqi@0 | 427 | #endif |
aoqi@0 | 428 | |
aoqi@0 | 429 | // Make the nmethod non entrant. The nmethod will continue to be |
aoqi@0 | 430 | // alive. It is used when an uncommon trap happens. Returns true |
aoqi@0 | 431 | // if this thread changed the state of the nmethod or false if |
aoqi@0 | 432 | // another thread performed the transition. |
aoqi@0 | 433 | bool make_not_entrant() { return make_not_entrant_or_zombie(not_entrant); } |
aoqi@0 | 434 | bool make_zombie() { return make_not_entrant_or_zombie(zombie); } |
aoqi@0 | 435 | |
aoqi@0 | 436 | // used by jvmti to track if the unload event has been reported |
aoqi@0 | 437 | bool unload_reported() { return _unload_reported; } |
aoqi@0 | 438 | void set_unload_reported() { _unload_reported = true; } |
aoqi@0 | 439 | |
aoqi@0 | 440 | bool is_marked_for_deoptimization() const { return _marked_for_deoptimization; } |
aoqi@0 | 441 | void mark_for_deoptimization() { _marked_for_deoptimization = true; } |
aoqi@0 | 442 | |
aoqi@0 | 443 | void make_unloaded(BoolObjectClosure* is_alive, oop cause); |
aoqi@0 | 444 | |
aoqi@0 | 445 | bool has_dependencies() { return dependencies_size() != 0; } |
aoqi@0 | 446 | void flush_dependencies(BoolObjectClosure* is_alive); |
aoqi@0 | 447 | bool has_flushed_dependencies() { return _has_flushed_dependencies; } |
aoqi@0 | 448 | void set_has_flushed_dependencies() { |
aoqi@0 | 449 | assert(!has_flushed_dependencies(), "should only happen once"); |
aoqi@0 | 450 | _has_flushed_dependencies = 1; |
aoqi@0 | 451 | } |
aoqi@0 | 452 | |
aoqi@0 | 453 | bool is_marked_for_reclamation() const { return _marked_for_reclamation; } |
aoqi@0 | 454 | void mark_for_reclamation() { _marked_for_reclamation = 1; } |
aoqi@0 | 455 | |
aoqi@0 | 456 | bool has_unsafe_access() const { return _has_unsafe_access; } |
aoqi@0 | 457 | void set_has_unsafe_access(bool z) { _has_unsafe_access = z; } |
aoqi@0 | 458 | |
aoqi@0 | 459 | bool has_method_handle_invokes() const { return _has_method_handle_invokes; } |
aoqi@0 | 460 | void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; } |
aoqi@0 | 461 | |
aoqi@0 | 462 | bool is_lazy_critical_native() const { return _lazy_critical_native; } |
aoqi@0 | 463 | void set_lazy_critical_native(bool z) { _lazy_critical_native = z; } |
aoqi@0 | 464 | |
aoqi@0 | 465 | bool has_wide_vectors() const { return _has_wide_vectors; } |
aoqi@0 | 466 | void set_has_wide_vectors(bool z) { _has_wide_vectors = z; } |
aoqi@0 | 467 | |
aoqi@0 | 468 | int comp_level() const { return _comp_level; } |
aoqi@0 | 469 | |
aoqi@0 | 470 | // Support for oops in scopes and relocs: |
aoqi@0 | 471 | // Note: index 0 is reserved for null. |
aoqi@0 | 472 | oop oop_at(int index) const { return index == 0 ? (oop) NULL: *oop_addr_at(index); } |
aoqi@0 | 473 | oop* oop_addr_at(int index) const { // for GC |
aoqi@0 | 474 | // relocation indexes are biased by 1 (because 0 is reserved) |
aoqi@0 | 475 | assert(index > 0 && index <= oops_size(), "must be a valid non-zero index"); |
aoqi@0 | 476 | assert(!_oops_are_stale, "oops are stale"); |
aoqi@0 | 477 | return &oops_begin()[index - 1]; |
aoqi@0 | 478 | } |
aoqi@0 | 479 | |
aoqi@0 | 480 | // Support for meta data in scopes and relocs: |
aoqi@0 | 481 | // Note: index 0 is reserved for null. |
aoqi@0 | 482 | Metadata* metadata_at(int index) const { return index == 0 ? NULL: *metadata_addr_at(index); } |
aoqi@0 | 483 | Metadata** metadata_addr_at(int index) const { // for GC |
aoqi@0 | 484 | // relocation indexes are biased by 1 (because 0 is reserved) |
aoqi@0 | 485 | assert(index > 0 && index <= metadata_size(), "must be a valid non-zero index"); |
aoqi@0 | 486 | return &metadata_begin()[index - 1]; |
aoqi@0 | 487 | } |
aoqi@0 | 488 | |
aoqi@0 | 489 | void copy_values(GrowableArray<jobject>* oops); |
aoqi@0 | 490 | void copy_values(GrowableArray<Metadata*>* metadata); |
aoqi@0 | 491 | |
aoqi@0 | 492 | // Relocation support |
aoqi@0 | 493 | private: |
aoqi@0 | 494 | void fix_oop_relocations(address begin, address end, bool initialize_immediates); |
aoqi@0 | 495 | inline void initialize_immediate_oop(oop* dest, jobject handle); |
aoqi@0 | 496 | |
aoqi@0 | 497 | public: |
aoqi@0 | 498 | void fix_oop_relocations(address begin, address end) { fix_oop_relocations(begin, end, false); } |
aoqi@0 | 499 | void fix_oop_relocations() { fix_oop_relocations(NULL, NULL, false); } |
aoqi@0 | 500 | void verify_oop_relocations(); |
aoqi@0 | 501 | |
aoqi@0 | 502 | bool is_at_poll_return(address pc); |
aoqi@0 | 503 | bool is_at_poll_or_poll_return(address pc); |
aoqi@0 | 504 | |
aoqi@0 | 505 | // Scavengable oop support |
aoqi@0 | 506 | bool on_scavenge_root_list() const { return (_scavenge_root_state & 1) != 0; } |
aoqi@0 | 507 | protected: |
aoqi@0 | 508 | enum { sl_on_list = 0x01, sl_marked = 0x10 }; |
aoqi@0 | 509 | void set_on_scavenge_root_list() { _scavenge_root_state = sl_on_list; } |
aoqi@0 | 510 | void clear_on_scavenge_root_list() { _scavenge_root_state = 0; } |
aoqi@0 | 511 | // assertion-checking and pruning logic uses the bits of _scavenge_root_state |
aoqi@0 | 512 | #ifndef PRODUCT |
aoqi@0 | 513 | void set_scavenge_root_marked() { _scavenge_root_state |= sl_marked; } |
aoqi@0 | 514 | void clear_scavenge_root_marked() { _scavenge_root_state &= ~sl_marked; } |
aoqi@0 | 515 | bool scavenge_root_not_marked() { return (_scavenge_root_state &~ sl_on_list) == 0; } |
aoqi@0 | 516 | // N.B. there is no positive marked query, and we only use the not_marked query for asserts. |
aoqi@0 | 517 | #endif //PRODUCT |
aoqi@0 | 518 | nmethod* scavenge_root_link() const { return _scavenge_root_link; } |
aoqi@0 | 519 | void set_scavenge_root_link(nmethod *n) { _scavenge_root_link = n; } |
aoqi@0 | 520 | |
aoqi@0 | 521 | public: |
aoqi@0 | 522 | |
aoqi@0 | 523 | // Sweeper support |
aoqi@0 | 524 | long stack_traversal_mark() { return _stack_traversal_mark; } |
aoqi@0 | 525 | void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; } |
aoqi@0 | 526 | |
aoqi@0 | 527 | // Exception cache support |
aoqi@0 | 528 | ExceptionCache* exception_cache() const { return _exception_cache; } |
aoqi@0 | 529 | void set_exception_cache(ExceptionCache *ec) { _exception_cache = ec; } |
aoqi@0 | 530 | address handler_for_exception_and_pc(Handle exception, address pc); |
aoqi@0 | 531 | void add_handler_for_exception_and_pc(Handle exception, address pc, address handler); |
aoqi@0 | 532 | void remove_from_exception_cache(ExceptionCache* ec); |
aoqi@0 | 533 | |
aoqi@0 | 534 | // implicit exceptions support |
aoqi@0 | 535 | address continuation_for_implicit_exception(address pc); |
aoqi@0 | 536 | |
aoqi@0 | 537 | // On-stack replacement support |
aoqi@0 | 538 | int osr_entry_bci() const { assert(is_osr_method(), "wrong kind of nmethod"); return _entry_bci; } |
aoqi@0 | 539 | address osr_entry() const { assert(is_osr_method(), "wrong kind of nmethod"); return _osr_entry_point; } |
aoqi@0 | 540 | void invalidate_osr_method(); |
aoqi@0 | 541 | nmethod* osr_link() const { return _osr_link; } |
aoqi@0 | 542 | void set_osr_link(nmethod *n) { _osr_link = n; } |
aoqi@0 | 543 | |
aoqi@0 | 544 | // tells whether frames described by this nmethod can be deoptimized |
aoqi@0 | 545 | // note: native wrappers cannot be deoptimized. |
aoqi@0 | 546 | bool can_be_deoptimized() const { return is_java_method(); } |
aoqi@0 | 547 | |
aoqi@0 | 548 | // Inline cache support |
aoqi@0 | 549 | void clear_inline_caches(); |
aoqi@0 | 550 | void cleanup_inline_caches(); |
aoqi@0 | 551 | bool inlinecache_check_contains(address addr) const { |
aoqi@0 | 552 | return (addr >= code_begin() && addr < verified_entry_point()); |
aoqi@0 | 553 | } |
aoqi@0 | 554 | |
aoqi@0 | 555 | // Check that all metadata is still alive |
aoqi@0 | 556 | void verify_metadata_loaders(address low_boundary, BoolObjectClosure* is_alive); |
aoqi@0 | 557 | |
aoqi@0 | 558 | // unlink and deallocate this nmethod |
aoqi@0 | 559 | // Only NMethodSweeper class is expected to use this. NMethodSweeper is not |
aoqi@0 | 560 | // expected to use any other private methods/data in this class. |
aoqi@0 | 561 | |
aoqi@0 | 562 | protected: |
aoqi@0 | 563 | void flush(); |
aoqi@0 | 564 | |
aoqi@0 | 565 | public: |
aoqi@0 | 566 | // When true is returned, it is unsafe to remove this nmethod even if |
aoqi@0 | 567 | // it is a zombie, since the VM or the ServiceThread might still be |
aoqi@0 | 568 | // using it. |
aoqi@0 | 569 | bool is_locked_by_vm() const { return _lock_count >0; } |
aoqi@0 | 570 | |
aoqi@0 | 571 | // See comment at definition of _last_seen_on_stack |
aoqi@0 | 572 | void mark_as_seen_on_stack(); |
aoqi@0 | 573 | bool can_not_entrant_be_converted(); |
aoqi@0 | 574 | |
aoqi@0 | 575 | // Evolution support. We make old (discarded) compiled methods point to new Method*s. |
aoqi@0 | 576 | void set_method(Method* method) { _method = method; } |
aoqi@0 | 577 | |
aoqi@0 | 578 | // GC support |
aoqi@0 | 579 | void do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred); |
aoqi@0 | 580 | bool can_unload(BoolObjectClosure* is_alive, oop* root, bool unloading_occurred); |
aoqi@0 | 581 | |
aoqi@0 | 582 | void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, |
aoqi@0 | 583 | OopClosure* f); |
aoqi@0 | 584 | void oops_do(OopClosure* f) { oops_do(f, false); } |
aoqi@0 | 585 | void oops_do(OopClosure* f, bool allow_zombie); |
aoqi@0 | 586 | bool detect_scavenge_root_oops(); |
aoqi@0 | 587 | void verify_scavenge_root_oops() PRODUCT_RETURN; |
aoqi@0 | 588 | |
aoqi@0 | 589 | bool test_set_oops_do_mark(); |
aoqi@0 | 590 | static void oops_do_marking_prologue(); |
aoqi@0 | 591 | static void oops_do_marking_epilogue(); |
aoqi@0 | 592 | static bool oops_do_marking_is_active() { return _oops_do_mark_nmethods != NULL; } |
aoqi@0 | 593 | bool test_oops_do_mark() { return _oops_do_mark_link != NULL; } |
aoqi@0 | 594 | |
aoqi@0 | 595 | // ScopeDesc for an instruction |
aoqi@0 | 596 | ScopeDesc* scope_desc_at(address pc); |
aoqi@0 | 597 | |
aoqi@0 | 598 | private: |
aoqi@0 | 599 | ScopeDesc* scope_desc_in(address begin, address end); |
aoqi@0 | 600 | |
aoqi@0 | 601 | address* orig_pc_addr(const frame* fr) { return (address*) ((address)fr->unextended_sp() + _orig_pc_offset); } |
aoqi@0 | 602 | |
aoqi@0 | 603 | PcDesc* find_pc_desc_internal(address pc, bool approximate); |
aoqi@0 | 604 | |
aoqi@0 | 605 | PcDesc* find_pc_desc(address pc, bool approximate) { |
aoqi@0 | 606 | PcDesc* desc = _pc_desc_cache.last_pc_desc(); |
aoqi@0 | 607 | if (desc != NULL && desc->pc_offset() == pc - code_begin()) { |
aoqi@0 | 608 | return desc; |
aoqi@0 | 609 | } |
aoqi@0 | 610 | return find_pc_desc_internal(pc, approximate); |
aoqi@0 | 611 | } |
aoqi@0 | 612 | |
aoqi@0 | 613 | public: |
aoqi@0 | 614 | // ScopeDesc retrieval operation |
aoqi@0 | 615 | PcDesc* pc_desc_at(address pc) { return find_pc_desc(pc, false); } |
aoqi@0 | 616 | // pc_desc_near returns the first PcDesc at or after the givne pc. |
aoqi@0 | 617 | PcDesc* pc_desc_near(address pc) { return find_pc_desc(pc, true); } |
aoqi@0 | 618 | |
aoqi@0 | 619 | public: |
aoqi@0 | 620 | // copying of debugging information |
aoqi@0 | 621 | void copy_scopes_pcs(PcDesc* pcs, int count); |
aoqi@0 | 622 | void copy_scopes_data(address buffer, int size); |
aoqi@0 | 623 | |
aoqi@0 | 624 | // Deopt |
aoqi@0 | 625 | // Return true is the PC is one would expect if the frame is being deopted. |
aoqi@0 | 626 | bool is_deopt_pc (address pc) { return is_deopt_entry(pc) || is_deopt_mh_entry(pc); } |
aoqi@0 | 627 | bool is_deopt_entry (address pc) { return pc == deopt_handler_begin(); } |
aoqi@0 | 628 | bool is_deopt_mh_entry(address pc) { return pc == deopt_mh_handler_begin(); } |
aoqi@0 | 629 | // Accessor/mutator for the original pc of a frame before a frame was deopted. |
aoqi@0 | 630 | address get_original_pc(const frame* fr) { return *orig_pc_addr(fr); } |
aoqi@0 | 631 | void set_original_pc(const frame* fr, address pc) { *orig_pc_addr(fr) = pc; } |
aoqi@0 | 632 | |
aoqi@0 | 633 | static address get_deopt_original_pc(const frame* fr); |
aoqi@0 | 634 | |
aoqi@0 | 635 | // MethodHandle |
aoqi@0 | 636 | bool is_method_handle_return(address return_pc); |
aoqi@0 | 637 | |
aoqi@0 | 638 | // jvmti support: |
aoqi@0 | 639 | void post_compiled_method_load_event(); |
aoqi@0 | 640 | jmethodID get_and_cache_jmethod_id(); |
aoqi@0 | 641 | |
aoqi@0 | 642 | // verify operations |
aoqi@0 | 643 | void verify(); |
aoqi@0 | 644 | void verify_scopes(); |
aoqi@0 | 645 | void verify_interrupt_point(address interrupt_point); |
aoqi@0 | 646 | |
aoqi@0 | 647 | // printing support |
aoqi@0 | 648 | void print() const; |
aoqi@0 | 649 | void print_code(); |
aoqi@0 | 650 | void print_relocations() PRODUCT_RETURN; |
aoqi@0 | 651 | void print_pcs() PRODUCT_RETURN; |
aoqi@0 | 652 | void print_scopes() PRODUCT_RETURN; |
aoqi@0 | 653 | void print_dependencies() PRODUCT_RETURN; |
aoqi@0 | 654 | void print_value_on(outputStream* st) const PRODUCT_RETURN; |
aoqi@0 | 655 | void print_calls(outputStream* st) PRODUCT_RETURN; |
aoqi@0 | 656 | void print_handler_table() PRODUCT_RETURN; |
aoqi@0 | 657 | void print_nul_chk_table() PRODUCT_RETURN; |
aoqi@0 | 658 | void print_nmethod(bool print_code); |
aoqi@0 | 659 | |
aoqi@0 | 660 | // need to re-define this from CodeBlob else the overload hides it |
aoqi@0 | 661 | virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); } |
aoqi@0 | 662 | void print_on(outputStream* st, const char* msg) const; |
aoqi@0 | 663 | |
aoqi@0 | 664 | // Logging |
aoqi@0 | 665 | void log_identity(xmlStream* log) const; |
aoqi@0 | 666 | void log_new_nmethod() const; |
aoqi@0 | 667 | void log_state_change() const; |
aoqi@0 | 668 | |
aoqi@0 | 669 | // Prints block-level comments, including nmethod specific block labels: |
aoqi@0 | 670 | virtual void print_block_comment(outputStream* stream, address block_begin) const { |
aoqi@0 | 671 | print_nmethod_labels(stream, block_begin); |
aoqi@0 | 672 | CodeBlob::print_block_comment(stream, block_begin); |
aoqi@0 | 673 | } |
aoqi@0 | 674 | void print_nmethod_labels(outputStream* stream, address block_begin) const; |
aoqi@0 | 675 | |
aoqi@0 | 676 | // Prints a comment for one native instruction (reloc info, pc desc) |
aoqi@0 | 677 | void print_code_comment_on(outputStream* st, int column, address begin, address end); |
aoqi@0 | 678 | static void print_statistics() PRODUCT_RETURN; |
aoqi@0 | 679 | |
aoqi@0 | 680 | // Compiler task identification. Note that all OSR methods |
aoqi@0 | 681 | // are numbered in an independent sequence if CICountOSR is true, |
aoqi@0 | 682 | // and native method wrappers are also numbered independently if |
aoqi@0 | 683 | // CICountNative is true. |
aoqi@0 | 684 | int compile_id() const { return _compile_id; } |
aoqi@0 | 685 | const char* compile_kind() const; |
aoqi@0 | 686 | |
aoqi@0 | 687 | // For debugging |
aoqi@0 | 688 | // CompiledIC* IC_at(char* p) const; |
aoqi@0 | 689 | // PrimitiveIC* primitiveIC_at(char* p) const; |
aoqi@0 | 690 | oop embeddedOop_at(address p); |
aoqi@0 | 691 | |
aoqi@0 | 692 | // tells if any of this method's dependencies have been invalidated |
aoqi@0 | 693 | // (this is expensive!) |
aoqi@0 | 694 | bool check_all_dependencies(); |
aoqi@0 | 695 | |
aoqi@0 | 696 | // tells if this compiled method is dependent on the given changes, |
aoqi@0 | 697 | // and the changes have invalidated it |
aoqi@0 | 698 | bool check_dependency_on(DepChange& changes); |
aoqi@0 | 699 | |
aoqi@0 | 700 | // Evolution support. Tells if this compiled method is dependent on any of |
aoqi@0 | 701 | // methods m() of class dependee, such that if m() in dependee is replaced, |
aoqi@0 | 702 | // this compiled method will have to be deoptimized. |
aoqi@0 | 703 | bool is_evol_dependent_on(Klass* dependee); |
aoqi@0 | 704 | |
aoqi@0 | 705 | // Fast breakpoint support. Tells if this compiled method is |
aoqi@0 | 706 | // dependent on the given method. Returns true if this nmethod |
aoqi@0 | 707 | // corresponds to the given method as well. |
aoqi@0 | 708 | bool is_dependent_on_method(Method* dependee); |
aoqi@0 | 709 | |
aoqi@0 | 710 | // is it ok to patch at address? |
aoqi@0 | 711 | bool is_patchable_at(address instr_address); |
aoqi@0 | 712 | |
aoqi@0 | 713 | // UseBiasedLocking support |
aoqi@0 | 714 | ByteSize native_receiver_sp_offset() { |
aoqi@0 | 715 | return _native_receiver_sp_offset; |
aoqi@0 | 716 | } |
aoqi@0 | 717 | ByteSize native_basic_lock_sp_offset() { |
aoqi@0 | 718 | return _native_basic_lock_sp_offset; |
aoqi@0 | 719 | } |
aoqi@0 | 720 | |
aoqi@0 | 721 | // support for code generation |
aoqi@0 | 722 | static int verified_entry_point_offset() { return offset_of(nmethod, _verified_entry_point); } |
aoqi@0 | 723 | static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); } |
aoqi@0 | 724 | static int entry_bci_offset() { return offset_of(nmethod, _entry_bci); } |
aoqi@0 | 725 | |
aoqi@0 | 726 | // RedefineClasses support. Mark metadata in nmethods as on_stack so that |
aoqi@0 | 727 | // redefine classes doesn't purge it. |
aoqi@0 | 728 | static void mark_on_stack(nmethod* nm) { |
aoqi@0 | 729 | nm->metadata_do(Metadata::mark_on_stack); |
aoqi@0 | 730 | } |
aoqi@0 | 731 | void metadata_do(void f(Metadata*)); |
aoqi@0 | 732 | }; |
aoqi@0 | 733 | |
aoqi@0 | 734 | // Locks an nmethod so its code will not get removed and it will not |
aoqi@0 | 735 | // be made into a zombie, even if it is a not_entrant method. After the |
aoqi@0 | 736 | // nmethod becomes a zombie, if CompiledMethodUnload event processing |
aoqi@0 | 737 | // needs to be done, then lock_nmethod() is used directly to keep the |
aoqi@0 | 738 | // generated code from being reused too early. |
aoqi@0 | 739 | class nmethodLocker : public StackObj { |
aoqi@0 | 740 | nmethod* _nm; |
aoqi@0 | 741 | |
aoqi@0 | 742 | public: |
aoqi@0 | 743 | |
aoqi@0 | 744 | // note: nm can be NULL |
aoqi@0 | 745 | // Only JvmtiDeferredEvent::compiled_method_unload_event() |
aoqi@0 | 746 | // should pass zombie_ok == true. |
aoqi@0 | 747 | static void lock_nmethod(nmethod* nm, bool zombie_ok = false); |
aoqi@0 | 748 | static void unlock_nmethod(nmethod* nm); // (ditto) |
aoqi@0 | 749 | |
aoqi@0 | 750 | nmethodLocker(address pc); // derive nm from pc |
aoqi@0 | 751 | nmethodLocker(nmethod *nm) { _nm = nm; lock_nmethod(_nm); } |
aoqi@0 | 752 | nmethodLocker() { _nm = NULL; } |
aoqi@0 | 753 | ~nmethodLocker() { unlock_nmethod(_nm); } |
aoqi@0 | 754 | |
aoqi@0 | 755 | nmethod* code() { return _nm; } |
aoqi@0 | 756 | void set_code(nmethod* new_nm) { |
aoqi@0 | 757 | unlock_nmethod(_nm); // note: This works even if _nm==new_nm. |
aoqi@0 | 758 | _nm = new_nm; |
aoqi@0 | 759 | lock_nmethod(_nm); |
aoqi@0 | 760 | } |
aoqi@0 | 761 | }; |
aoqi@0 | 762 | |
aoqi@0 | 763 | #endif // SHARE_VM_CODE_NMETHOD_HPP |