Mercurial > hg > graal-compiler
annotate src/share/vm/code/nmethod.hpp @ 1726:71faaa8e3ccc
6974176: ShouldNotReachHere, instanceKlass.cpp:1426
Reviewed-by: kvn, twisti
| author | never |
|---|---|
| date | Thu, 12 Aug 2010 16:38:23 -0700 |
| parents | d2ede61b7a12 |
| children | 3e8fbc61cee8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 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 // This class is used internally by nmethods, to cache | |
| 26 // exception/pc/handler information. | |
| 27 | |
| 28 class ExceptionCache : public CHeapObj { | |
| 29 friend class VMStructs; | |
| 30 private: | |
| 31 static address _unwind_handler; | |
| 32 enum { cache_size = 16 }; | |
| 33 klassOop _exception_type; | |
| 34 address _pc[cache_size]; | |
| 35 address _handler[cache_size]; | |
| 36 int _count; | |
| 37 ExceptionCache* _next; | |
| 38 | |
| 39 address pc_at(int index) { assert(index >= 0 && index < count(),""); return _pc[index]; } | |
| 40 void set_pc_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _pc[index] = a; } | |
| 41 address handler_at(int index) { assert(index >= 0 && index < count(),""); return _handler[index]; } | |
| 42 void set_handler_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _handler[index] = a; } | |
| 43 int count() { return _count; } | |
| 44 void increment_count() { _count++; } | |
| 45 | |
| 46 public: | |
| 47 | |
| 48 ExceptionCache(Handle exception, address pc, address handler); | |
| 49 | |
| 50 klassOop exception_type() { return _exception_type; } | |
| 51 klassOop* exception_type_addr() { return &_exception_type; } | |
| 52 ExceptionCache* next() { return _next; } | |
| 53 void set_next(ExceptionCache *ec) { _next = ec; } | |
| 54 | |
| 55 address match(Handle exception, address pc); | |
| 56 bool match_exception_with_space(Handle exception) ; | |
| 57 address test_address(address addr); | |
| 58 bool add_address_and_handler(address addr, address handler) ; | |
| 59 | |
| 60 static address unwind_handler() { return _unwind_handler; } | |
| 61 }; | |
| 62 | |
| 63 | |
| 64 // cache pc descs found in earlier inquiries | |
| 65 class PcDescCache VALUE_OBJ_CLASS_SPEC { | |
| 66 friend class VMStructs; | |
| 67 private: | |
| 68 enum { cache_size = 4 }; | |
| 69 PcDesc* _last_pc_desc; // most recent pc_desc found | |
| 70 PcDesc* _pc_descs[cache_size]; // last cache_size pc_descs found | |
| 71 public: | |
| 72 PcDescCache() { debug_only(_last_pc_desc = NULL); } | |
| 73 void reset_to(PcDesc* initial_pc_desc); | |
| 74 PcDesc* find_pc_desc(int pc_offset, bool approximate); | |
| 75 void add_pc_desc(PcDesc* pc_desc); | |
| 76 PcDesc* last_pc_desc() { return _last_pc_desc; } | |
| 77 }; | |
| 78 | |
| 79 | |
| 80 // nmethods (native methods) are the compiled code versions of Java methods. | |
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81 // |
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82 // An nmethod contains: |
| 0 | 83 // - header (the nmethod structure) |
| 84 // [Relocation] | |
| 85 // - relocation information | |
| 86 // - constant part (doubles, longs and floats used in nmethod) | |
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87 // - oop table |
| 0 | 88 // [Code] |
| 89 // - code body | |
| 90 // - exception handler | |
| 91 // - stub code | |
| 92 // [Debugging information] | |
| 93 // - oop array | |
| 94 // - data array | |
| 95 // - pcs | |
| 96 // [Exception handler table] | |
| 97 // - handler entry point array | |
| 98 // [Implicit Null Pointer exception table] | |
| 99 // - implicit null table array | |
| 100 | |
| 101 class Dependencies; | |
| 102 class ExceptionHandlerTable; | |
| 103 class ImplicitExceptionTable; | |
| 104 class AbstractCompiler; | |
| 105 class xmlStream; | |
| 106 | |
| 107 class nmethod : public CodeBlob { | |
| 108 friend class VMStructs; | |
| 109 friend class NMethodSweeper; | |
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110 friend class CodeCache; // non-perm oops |
| 0 | 111 private: |
| 112 // Shared fields for all nmethod's | |
| 113 methodOop _method; | |
| 114 int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method | |
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115 jmethodID _jmethod_id; // Cache of method()->jmethod_id() |
| 0 | 116 |
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117 // To support simple linked-list chaining of nmethods: |
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118 nmethod* _osr_link; // from instanceKlass::osr_nmethods_head |
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119 nmethod* _scavenge_root_link; // from CodeCache::scavenge_root_nmethods |
| 1202 | 120 nmethod* _saved_nmethod_link; // from CodeCache::speculatively_disconnect |
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121 |
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122 static nmethod* volatile _oops_do_mark_nmethods; |
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123 nmethod* volatile _oops_do_mark_link; |
| 0 | 124 |
| 125 AbstractCompiler* _compiler; // The compiler which compiled this nmethod | |
| 126 | |
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127 // offsets for entry points |
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128 address _entry_point; // entry point with class check |
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129 address _verified_entry_point; // entry point without class check |
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130 address _osr_entry_point; // entry point for on stack replacement |
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131 |
| 0 | 132 // Offsets for different nmethod parts |
| 133 int _exception_offset; | |
| 1204 | 134 // All deoptee's will resume execution at this location described by |
| 135 // this offset. | |
| 0 | 136 int _deoptimize_offset; |
| 1204 | 137 // All deoptee's at a MethodHandle call site will resume execution |
| 138 // at this location described by this offset. | |
| 139 int _deoptimize_mh_offset; | |
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140 // Offset of the unwind handler if it exists |
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141 int _unwind_handler_offset; |
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142 |
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143 #ifdef HAVE_DTRACE_H |
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144 int _trap_offset; |
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145 #endif // def HAVE_DTRACE_H |
| 0 | 146 int _stub_offset; |
| 147 int _consts_offset; | |
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148 int _oops_offset; // offset to where embedded oop table begins (inside data) |
| 0 | 149 int _scopes_data_offset; |
| 150 int _scopes_pcs_offset; | |
| 151 int _dependencies_offset; | |
| 152 int _handler_table_offset; | |
| 153 int _nul_chk_table_offset; | |
| 154 int _nmethod_end_offset; | |
| 155 | |
| 156 // location in frame (offset for sp) that deopt can store the original | |
| 157 // pc during a deopt. | |
| 158 int _orig_pc_offset; | |
| 159 | |
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160 int _compile_id; // which compilation made this nmethod |
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161 int _comp_level; // compilation level |
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162 |
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163 // protected by CodeCache_lock |
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164 bool _has_flushed_dependencies; // Used for maintenance of dependencies (CodeCache_lock) |
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165 bool _speculatively_disconnected; // Marked for potential unload |
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166 |
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167 bool _marked_for_reclamation; // Used by NMethodSweeper (set only by sweeper) |
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168 bool _marked_for_deoptimization; // Used for stack deoptimization |
| 0 | 169 |
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170 // used by jvmti to track if an unload event has been posted for this nmethod. |
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171 bool _unload_reported; |
| 0 | 172 |
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173 // set during construction |
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174 unsigned int _has_unsafe_access:1; // May fault due to unsafe access. |
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175 unsigned int _has_method_handle_invokes:1; // Has this method MethodHandle invokes? |
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176 |
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177 // Protected by Patching_lock |
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178 unsigned char _state; // {alive, not_entrant, zombie, unloaded) |
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179 |
| 1726 | 180 #ifdef ASSERT |
| 181 bool _oops_are_stale; // indicates that it's no longer safe to access oops section | |
| 182 #endif | |
| 183 | |
| 0 | 184 enum { alive = 0, |
| 605 | 185 not_entrant = 1, // uncommon trap has happened but activations may still exist |
| 0 | 186 zombie = 2, |
| 187 unloaded = 3 }; | |
| 188 | |
| 189 | |
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190 jbyte _scavenge_root_state; |
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191 |
| 0 | 192 NOT_PRODUCT(bool _has_debug_info; ) |
| 193 | |
| 194 // Nmethod Flushing lock (if non-zero, then the nmethod is not removed) | |
| 195 jint _lock_count; | |
| 196 | |
| 197 // not_entrant method removal. Each mark_sweep pass will update | |
| 198 // this mark to current sweep invocation count if it is seen on the | |
| 199 // stack. An not_entrant method can be removed when there is no | |
| 200 // more activations, i.e., when the _stack_traversal_mark is less than | |
| 201 // current sweep traversal index. | |
| 202 long _stack_traversal_mark; | |
| 203 | |
| 204 ExceptionCache *_exception_cache; | |
| 205 PcDescCache _pc_desc_cache; | |
| 206 | |
| 207 // These are only used for compiled synchronized native methods to | |
| 208 // locate the owner and stack slot for the BasicLock so that we can | |
| 209 // properly revoke the bias of the owner if necessary. They are | |
| 210 // needed because there is no debug information for compiled native | |
| 211 // wrappers and the oop maps are insufficient to allow | |
| 212 // frame::retrieve_receiver() to work. Currently they are expected | |
| 213 // to be byte offsets from the Java stack pointer for maximum code | |
| 214 // sharing between platforms. Note that currently biased locking | |
| 215 // will never cause Class instances to be biased but this code | |
| 216 // handles the static synchronized case as well. | |
| 217 ByteSize _compiled_synchronized_native_basic_lock_owner_sp_offset; | |
| 218 ByteSize _compiled_synchronized_native_basic_lock_sp_offset; | |
| 219 | |
| 220 friend class nmethodLocker; | |
| 221 | |
| 222 // For native wrappers | |
| 223 nmethod(methodOop method, | |
| 224 int nmethod_size, | |
| 225 CodeOffsets* offsets, | |
| 226 CodeBuffer *code_buffer, | |
| 227 int frame_size, | |
| 228 ByteSize basic_lock_owner_sp_offset, /* synchronized natives only */ | |
| 229 ByteSize basic_lock_sp_offset, /* synchronized natives only */ | |
| 230 OopMapSet* oop_maps); | |
| 231 | |
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232 #ifdef HAVE_DTRACE_H |
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233 // For native wrappers |
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234 nmethod(methodOop method, |
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235 int nmethod_size, |
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236 CodeOffsets* offsets, |
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237 CodeBuffer *code_buffer, |
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238 int frame_size); |
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239 #endif // def HAVE_DTRACE_H |
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240 |
| 0 | 241 // Creation support |
| 242 nmethod(methodOop method, | |
| 243 int nmethod_size, | |
| 244 int compile_id, | |
| 245 int entry_bci, | |
| 246 CodeOffsets* offsets, | |
| 247 int orig_pc_offset, | |
| 248 DebugInformationRecorder *recorder, | |
| 249 Dependencies* dependencies, | |
| 250 CodeBuffer *code_buffer, | |
| 251 int frame_size, | |
| 252 OopMapSet* oop_maps, | |
| 253 ExceptionHandlerTable* handler_table, | |
| 254 ImplicitExceptionTable* nul_chk_table, | |
| 255 AbstractCompiler* compiler, | |
| 256 int comp_level); | |
| 257 | |
| 258 // helper methods | |
| 259 void* operator new(size_t size, int nmethod_size); | |
| 260 | |
| 261 const char* reloc_string_for(u_char* begin, u_char* end); | |
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262 // Returns true if this thread changed the state of the nmethod or |
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263 // false if another thread performed the transition. |
| 1141 | 264 bool make_not_entrant_or_zombie(unsigned int state); |
| 0 | 265 void inc_decompile_count(); |
| 266 | |
| 267 // Used to manipulate the exception cache | |
| 268 void add_exception_cache_entry(ExceptionCache* new_entry); | |
| 269 ExceptionCache* exception_cache_entry_for_exception(Handle exception); | |
| 270 | |
| 271 // Inform external interfaces that a compiled method has been unloaded | |
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272 void post_compiled_method_unload(); |
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273 |
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274 // Initailize fields to their default values |
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275 void init_defaults(); |
| 0 | 276 |
| 277 public: | |
| 278 // create nmethod with entry_bci | |
| 279 static nmethod* new_nmethod(methodHandle method, | |
| 280 int compile_id, | |
| 281 int entry_bci, | |
| 282 CodeOffsets* offsets, | |
| 283 int orig_pc_offset, | |
| 284 DebugInformationRecorder* recorder, | |
| 285 Dependencies* dependencies, | |
| 286 CodeBuffer *code_buffer, | |
| 287 int frame_size, | |
| 288 OopMapSet* oop_maps, | |
| 289 ExceptionHandlerTable* handler_table, | |
| 290 ImplicitExceptionTable* nul_chk_table, | |
| 291 AbstractCompiler* compiler, | |
| 292 int comp_level); | |
| 293 | |
| 294 static nmethod* new_native_nmethod(methodHandle method, | |
| 295 CodeBuffer *code_buffer, | |
| 296 int vep_offset, | |
| 297 int frame_complete, | |
| 298 int frame_size, | |
| 299 ByteSize receiver_sp_offset, | |
| 300 ByteSize basic_lock_sp_offset, | |
| 301 OopMapSet* oop_maps); | |
| 302 | |
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303 #ifdef HAVE_DTRACE_H |
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304 // The method we generate for a dtrace probe has to look |
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305 // like an nmethod as far as the rest of the system is concerned |
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306 // which is somewhat unfortunate. |
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307 static nmethod* new_dtrace_nmethod(methodHandle method, |
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308 CodeBuffer *code_buffer, |
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309 int vep_offset, |
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310 int trap_offset, |
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311 int frame_complete, |
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312 int frame_size); |
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313 |
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314 int trap_offset() const { return _trap_offset; } |
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315 address trap_address() const { return code_begin() + _trap_offset; } |
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316 |
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317 #endif // def HAVE_DTRACE_H |
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318 |
| 0 | 319 // accessors |
| 320 methodOop method() const { return _method; } | |
| 321 AbstractCompiler* compiler() const { return _compiler; } | |
| 322 | |
| 323 #ifndef PRODUCT | |
| 324 bool has_debug_info() const { return _has_debug_info; } | |
| 325 void set_has_debug_info(bool f) { _has_debug_info = false; } | |
| 326 #endif // NOT PRODUCT | |
| 327 | |
| 328 // type info | |
| 329 bool is_nmethod() const { return true; } | |
| 330 bool is_java_method() const { return !method()->is_native(); } | |
| 331 bool is_native_method() const { return method()->is_native(); } | |
| 332 bool is_osr_method() const { return _entry_bci != InvocationEntryBci; } | |
| 333 | |
| 334 bool is_compiled_by_c1() const; | |
| 335 bool is_compiled_by_c2() const; | |
| 1692 | 336 bool is_compiled_by_shark() const; |
| 0 | 337 |
| 338 // boundaries for different parts | |
| 1204 | 339 address code_begin () const { return _entry_point; } |
| 340 address code_end () const { return header_begin() + _stub_offset ; } | |
| 341 address exception_begin () const { return header_begin() + _exception_offset ; } | |
| 342 address deopt_handler_begin () const { return header_begin() + _deoptimize_offset ; } | |
| 343 address deopt_mh_handler_begin() const { return header_begin() + _deoptimize_mh_offset ; } | |
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344 address unwind_handler_begin () const { return _unwind_handler_offset != -1 ? (header_begin() + _unwind_handler_offset) : NULL; } |
| 1204 | 345 address stub_begin () const { return header_begin() + _stub_offset ; } |
| 346 address stub_end () const { return header_begin() + _consts_offset ; } | |
| 347 address consts_begin () const { return header_begin() + _consts_offset ; } | |
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348 address consts_end () const { return header_begin() + _oops_offset ; } |
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349 oop* oops_begin () const { return (oop*) (header_begin() + _oops_offset) ; } |
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350 oop* oops_end () const { return (oop*) (header_begin() + _scopes_data_offset) ; } |
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351 |
| 1204 | 352 address scopes_data_begin () const { return header_begin() + _scopes_data_offset ; } |
| 353 address scopes_data_end () const { return header_begin() + _scopes_pcs_offset ; } | |
| 354 PcDesc* scopes_pcs_begin () const { return (PcDesc*)(header_begin() + _scopes_pcs_offset ); } | |
| 355 PcDesc* scopes_pcs_end () const { return (PcDesc*)(header_begin() + _dependencies_offset) ; } | |
| 356 address dependencies_begin () const { return header_begin() + _dependencies_offset ; } | |
| 357 address dependencies_end () const { return header_begin() + _handler_table_offset ; } | |
| 358 address handler_table_begin () const { return header_begin() + _handler_table_offset ; } | |
| 359 address handler_table_end () const { return header_begin() + _nul_chk_table_offset ; } | |
| 360 address nul_chk_table_begin () const { return header_begin() + _nul_chk_table_offset ; } | |
| 361 address nul_chk_table_end () const { return header_begin() + _nmethod_end_offset ; } | |
| 0 | 362 |
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363 // Sizes |
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364 int code_size () const { return code_end () - code_begin (); } |
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365 int stub_size () const { return stub_end () - stub_begin (); } |
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366 int consts_size () const { return consts_end () - consts_begin (); } |
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367 int oops_size () const { return (address) oops_end () - (address) oops_begin (); } |
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368 int scopes_data_size () const { return scopes_data_end () - scopes_data_begin (); } |
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369 int scopes_pcs_size () const { return (intptr_t) scopes_pcs_end () - (intptr_t) scopes_pcs_begin (); } |
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370 int dependencies_size () const { return dependencies_end () - dependencies_begin (); } |
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371 int handler_table_size() const { return handler_table_end() - handler_table_begin(); } |
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372 int nul_chk_table_size() const { return nul_chk_table_end() - nul_chk_table_begin(); } |
| 0 | 373 |
| 374 int total_size () const; | |
| 375 | |
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376 // Containment |
| 0 | 377 bool code_contains (address addr) const { return code_begin () <= addr && addr < code_end (); } |
| 378 bool stub_contains (address addr) const { return stub_begin () <= addr && addr < stub_end (); } | |
| 379 bool consts_contains (address addr) const { return consts_begin () <= addr && addr < consts_end (); } | |
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380 bool oops_contains (oop* addr) const { return oops_begin () <= addr && addr < oops_end (); } |
| 0 | 381 bool scopes_data_contains (address addr) const { return scopes_data_begin () <= addr && addr < scopes_data_end (); } |
| 382 bool scopes_pcs_contains (PcDesc* addr) const { return scopes_pcs_begin () <= addr && addr < scopes_pcs_end (); } | |
| 383 bool handler_table_contains(address addr) const { return handler_table_begin() <= addr && addr < handler_table_end(); } | |
| 384 bool nul_chk_table_contains(address addr) const { return nul_chk_table_begin() <= addr && addr < nul_chk_table_end(); } | |
| 385 | |
| 386 // entry points | |
| 387 address entry_point() const { return _entry_point; } // normal entry point | |
| 388 address verified_entry_point() const { return _verified_entry_point; } // if klass is correct | |
| 389 | |
| 390 // flag accessing and manipulation | |
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391 bool is_in_use() const { return _state == alive; } |
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392 bool is_alive() const { return _state == alive || _state == not_entrant; } |
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393 bool is_not_entrant() const { return _state == not_entrant; } |
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394 bool is_zombie() const { return _state == zombie; } |
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395 bool is_unloaded() const { return _state == unloaded; } |
| 0 | 396 |
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397 // Make the nmethod non entrant. The nmethod will continue to be |
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398 // alive. It is used when an uncommon trap happens. Returns true |
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399 // if this thread changed the state of the nmethod or false if |
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400 // another thread performed the transition. |
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401 bool make_not_entrant() { return make_not_entrant_or_zombie(not_entrant); } |
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402 bool make_zombie() { return make_not_entrant_or_zombie(zombie); } |
| 0 | 403 |
| 404 // used by jvmti to track if the unload event has been reported | |
| 405 bool unload_reported() { return _unload_reported; } | |
| 406 void set_unload_reported() { _unload_reported = true; } | |
| 407 | |
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408 bool is_marked_for_deoptimization() const { return _marked_for_deoptimization; } |
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409 void mark_for_deoptimization() { _marked_for_deoptimization = true; } |
| 0 | 410 |
| 411 void make_unloaded(BoolObjectClosure* is_alive, oop cause); | |
| 412 | |
| 413 bool has_dependencies() { return dependencies_size() != 0; } | |
| 414 void flush_dependencies(BoolObjectClosure* is_alive); | |
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415 bool has_flushed_dependencies() { return _has_flushed_dependencies; } |
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416 void set_has_flushed_dependencies() { |
| 0 | 417 assert(!has_flushed_dependencies(), "should only happen once"); |
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418 _has_flushed_dependencies = 1; |
| 0 | 419 } |
| 420 | |
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421 bool is_marked_for_reclamation() const { return _marked_for_reclamation; } |
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422 void mark_for_reclamation() { _marked_for_reclamation = 1; } |
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423 |
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424 bool has_unsafe_access() const { return _has_unsafe_access; } |
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425 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; } |
| 0 | 426 |
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427 bool has_method_handle_invokes() const { return _has_method_handle_invokes; } |
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428 void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; } |
| 0 | 429 |
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430 bool is_speculatively_disconnected() const { return _speculatively_disconnected; } |
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431 void set_speculatively_disconnected(bool z) { _speculatively_disconnected = z; } |
| 1202 | 432 |
| 0 | 433 int comp_level() const { return _comp_level; } |
| 434 | |
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435 // Support for oops in scopes and relocs: |
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436 // Note: index 0 is reserved for null. |
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437 oop oop_at(int index) const { return index == 0 ? (oop) NULL: *oop_addr_at(index); } |
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438 oop* oop_addr_at(int index) const { // for GC |
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439 // relocation indexes are biased by 1 (because 0 is reserved) |
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440 assert(index > 0 && index <= oops_size(), "must be a valid non-zero index"); |
| 1726 | 441 assert(!_oops_are_stale, "oops are stale"); |
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442 return &oops_begin()[index - 1]; |
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443 } |
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444 |
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445 void copy_oops(GrowableArray<jobject>* oops); |
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446 |
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447 // Relocation support |
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448 private: |
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449 void fix_oop_relocations(address begin, address end, bool initialize_immediates); |
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450 inline void initialize_immediate_oop(oop* dest, jobject handle); |
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451 |
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452 public: |
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453 void fix_oop_relocations(address begin, address end) { fix_oop_relocations(begin, end, false); } |
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454 void fix_oop_relocations() { fix_oop_relocations(NULL, NULL, false); } |
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455 |
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456 bool is_at_poll_return(address pc); |
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457 bool is_at_poll_or_poll_return(address pc); |
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458 |
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459 // Non-perm oop support |
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460 bool on_scavenge_root_list() const { return (_scavenge_root_state & 1) != 0; } |
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461 protected: |
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462 enum { npl_on_list = 0x01, npl_marked = 0x10 }; |
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463 void set_on_scavenge_root_list() { _scavenge_root_state = npl_on_list; } |
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464 void clear_on_scavenge_root_list() { _scavenge_root_state = 0; } |
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465 // assertion-checking and pruning logic uses the bits of _scavenge_root_state |
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466 #ifndef PRODUCT |
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467 void set_scavenge_root_marked() { _scavenge_root_state |= npl_marked; } |
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468 void clear_scavenge_root_marked() { _scavenge_root_state &= ~npl_marked; } |
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469 bool scavenge_root_not_marked() { return (_scavenge_root_state &~ npl_on_list) == 0; } |
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470 // N.B. there is no positive marked query, and we only use the not_marked query for asserts. |
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471 #endif //PRODUCT |
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472 nmethod* scavenge_root_link() const { return _scavenge_root_link; } |
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473 void set_scavenge_root_link(nmethod *n) { _scavenge_root_link = n; } |
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474 |
| 1202 | 475 nmethod* saved_nmethod_link() const { return _saved_nmethod_link; } |
| 476 void set_saved_nmethod_link(nmethod *n) { _saved_nmethod_link = n; } | |
| 477 | |
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478 public: |
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479 |
| 0 | 480 // Sweeper support |
| 481 long stack_traversal_mark() { return _stack_traversal_mark; } | |
| 482 void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; } | |
| 483 | |
| 484 // Exception cache support | |
| 485 ExceptionCache* exception_cache() const { return _exception_cache; } | |
| 486 void set_exception_cache(ExceptionCache *ec) { _exception_cache = ec; } | |
| 487 address handler_for_exception_and_pc(Handle exception, address pc); | |
| 488 void add_handler_for_exception_and_pc(Handle exception, address pc, address handler); | |
| 489 void remove_from_exception_cache(ExceptionCache* ec); | |
| 490 | |
| 491 // implicit exceptions support | |
| 492 address continuation_for_implicit_exception(address pc); | |
| 493 | |
| 494 // On-stack replacement support | |
| 495 int osr_entry_bci() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _entry_bci; } | |
| 496 address osr_entry() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _osr_entry_point; } | |
| 497 void invalidate_osr_method(); | |
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498 nmethod* osr_link() const { return _osr_link; } |
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499 void set_osr_link(nmethod *n) { _osr_link = n; } |
| 0 | 500 |
| 501 // tells whether frames described by this nmethod can be deoptimized | |
| 502 // note: native wrappers cannot be deoptimized. | |
| 503 bool can_be_deoptimized() const { return is_java_method(); } | |
| 504 | |
| 505 // Inline cache support | |
| 506 void clear_inline_caches(); | |
| 507 void cleanup_inline_caches(); | |
| 508 bool inlinecache_check_contains(address addr) const { | |
| 509 return (addr >= instructions_begin() && addr < verified_entry_point()); | |
| 510 } | |
| 511 | |
| 512 // unlink and deallocate this nmethod | |
| 513 // Only NMethodSweeper class is expected to use this. NMethodSweeper is not | |
| 514 // expected to use any other private methods/data in this class. | |
| 515 | |
| 516 protected: | |
| 517 void flush(); | |
| 518 | |
| 519 public: | |
| 520 // If returning true, it is unsafe to remove this nmethod even though it is a zombie | |
| 521 // nmethod, since the VM might have a reference to it. Should only be called from a safepoint. | |
| 522 bool is_locked_by_vm() const { return _lock_count >0; } | |
| 523 | |
| 524 // See comment at definition of _last_seen_on_stack | |
| 525 void mark_as_seen_on_stack(); | |
| 526 bool can_not_entrant_be_converted(); | |
| 527 | |
| 528 // Evolution support. We make old (discarded) compiled methods point to new methodOops. | |
| 529 void set_method(methodOop method) { _method = method; } | |
| 530 | |
| 531 // GC support | |
| 532 void do_unloading(BoolObjectClosure* is_alive, OopClosure* keep_alive, | |
| 533 bool unloading_occurred); | |
| 534 bool can_unload(BoolObjectClosure* is_alive, OopClosure* keep_alive, | |
| 535 oop* root, bool unloading_occurred); | |
| 536 | |
| 537 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, | |
| 538 OopClosure* f); | |
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539 void oops_do(OopClosure* f) { oops_do(f, false); } |
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540 void oops_do(OopClosure* f, bool do_strong_roots_only); |
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541 bool detect_scavenge_root_oops(); |
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542 void verify_scavenge_root_oops() PRODUCT_RETURN; |
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543 |
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544 bool test_set_oops_do_mark(); |
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545 static void oops_do_marking_prologue(); |
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546 static void oops_do_marking_epilogue(); |
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547 static bool oops_do_marking_is_active() { return _oops_do_mark_nmethods != NULL; } |
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548 DEBUG_ONLY(bool test_oops_do_mark() { return _oops_do_mark_link != NULL; }) |
| 0 | 549 |
| 550 // ScopeDesc for an instruction | |
| 551 ScopeDesc* scope_desc_at(address pc); | |
| 552 | |
| 553 private: | |
| 554 ScopeDesc* scope_desc_in(address begin, address end); | |
| 555 | |
| 1204 | 556 address* orig_pc_addr(const frame* fr) { return (address*) ((address)fr->unextended_sp() + _orig_pc_offset); } |
| 0 | 557 |
| 558 PcDesc* find_pc_desc_internal(address pc, bool approximate); | |
| 559 | |
| 560 PcDesc* find_pc_desc(address pc, bool approximate) { | |
| 561 PcDesc* desc = _pc_desc_cache.last_pc_desc(); | |
| 562 if (desc != NULL && desc->pc_offset() == pc - instructions_begin()) { | |
| 563 return desc; | |
| 564 } | |
| 565 return find_pc_desc_internal(pc, approximate); | |
| 566 } | |
| 567 | |
| 568 public: | |
| 569 // ScopeDesc retrieval operation | |
| 570 PcDesc* pc_desc_at(address pc) { return find_pc_desc(pc, false); } | |
| 571 // pc_desc_near returns the first PcDesc at or after the givne pc. | |
| 572 PcDesc* pc_desc_near(address pc) { return find_pc_desc(pc, true); } | |
| 573 | |
| 574 public: | |
| 575 // copying of debugging information | |
| 576 void copy_scopes_pcs(PcDesc* pcs, int count); | |
| 577 void copy_scopes_data(address buffer, int size); | |
| 578 | |
| 1204 | 579 // Deopt |
| 580 // Return true is the PC is one would expect if the frame is being deopted. | |
| 581 bool is_deopt_pc (address pc) { return is_deopt_entry(pc) || is_deopt_mh_entry(pc); } | |
| 582 bool is_deopt_entry (address pc) { return pc == deopt_handler_begin(); } | |
| 583 bool is_deopt_mh_entry(address pc) { return pc == deopt_mh_handler_begin(); } | |
| 0 | 584 // Accessor/mutator for the original pc of a frame before a frame was deopted. |
| 585 address get_original_pc(const frame* fr) { return *orig_pc_addr(fr); } | |
| 586 void set_original_pc(const frame* fr, address pc) { *orig_pc_addr(fr) = pc; } | |
| 587 | |
| 1204 | 588 static address get_deopt_original_pc(const frame* fr); |
| 589 | |
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590 // MethodHandle |
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591 bool is_method_handle_return(address return_pc); |
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592 |
| 0 | 593 // jvmti support: |
| 594 void post_compiled_method_load_event(); | |
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595 jmethodID get_and_cache_jmethod_id(); |
| 0 | 596 |
| 597 // verify operations | |
| 598 void verify(); | |
| 599 void verify_scopes(); | |
| 600 void verify_interrupt_point(address interrupt_point); | |
| 601 | |
| 602 // printing support | |
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603 void print() const; |
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604 void print_code(); |
| 0 | 605 void print_relocations() PRODUCT_RETURN; |
| 606 void print_pcs() PRODUCT_RETURN; | |
| 607 void print_scopes() PRODUCT_RETURN; | |
| 608 void print_dependencies() PRODUCT_RETURN; | |
| 609 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
| 610 void print_calls(outputStream* st) PRODUCT_RETURN; | |
| 611 void print_handler_table() PRODUCT_RETURN; | |
| 612 void print_nul_chk_table() PRODUCT_RETURN; | |
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613 void print_nmethod(bool print_code); |
| 0 | 614 |
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615 // need to re-define this from CodeBlob else the overload hides it |
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616 virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); } |
| 0 | 617 void print_on(outputStream* st, const char* title) const; |
| 618 | |
| 619 // Logging | |
| 620 void log_identity(xmlStream* log) const; | |
| 621 void log_new_nmethod() const; | |
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622 void log_state_change() const; |
| 0 | 623 |
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624 // Prints block-level comments, including nmethod specific block labels: |
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625 virtual void print_block_comment(outputStream* stream, address block_begin) { |
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626 print_nmethod_labels(stream, block_begin); |
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627 CodeBlob::print_block_comment(stream, block_begin); |
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628 } |
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629 void print_nmethod_labels(outputStream* stream, address block_begin); |
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630 |
| 0 | 631 // Prints a comment for one native instruction (reloc info, pc desc) |
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632 void print_code_comment_on(outputStream* st, int column, address begin, address end); |
| 0 | 633 static void print_statistics() PRODUCT_RETURN; |
| 634 | |
| 635 // Compiler task identification. Note that all OSR methods | |
| 636 // are numbered in an independent sequence if CICountOSR is true, | |
| 637 // and native method wrappers are also numbered independently if | |
| 638 // CICountNative is true. | |
| 639 int compile_id() const { return _compile_id; } | |
| 640 const char* compile_kind() const; | |
| 641 | |
| 642 // For debugging | |
| 643 // CompiledIC* IC_at(char* p) const; | |
| 644 // PrimitiveIC* primitiveIC_at(char* p) const; | |
| 645 oop embeddedOop_at(address p); | |
| 646 | |
| 647 // tells if any of this method's dependencies have been invalidated | |
| 648 // (this is expensive!) | |
| 649 bool check_all_dependencies(); | |
| 650 | |
| 651 // tells if this compiled method is dependent on the given changes, | |
| 652 // and the changes have invalidated it | |
| 653 bool check_dependency_on(DepChange& changes); | |
| 654 | |
| 655 // Evolution support. Tells if this compiled method is dependent on any of | |
| 656 // methods m() of class dependee, such that if m() in dependee is replaced, | |
| 657 // this compiled method will have to be deoptimized. | |
| 658 bool is_evol_dependent_on(klassOop dependee); | |
| 659 | |
| 660 // Fast breakpoint support. Tells if this compiled method is | |
| 661 // dependent on the given method. Returns true if this nmethod | |
| 662 // corresponds to the given method as well. | |
| 663 bool is_dependent_on_method(methodOop dependee); | |
| 664 | |
| 665 // is it ok to patch at address? | |
| 666 bool is_patchable_at(address instr_address); | |
| 667 | |
| 668 // UseBiasedLocking support | |
| 669 ByteSize compiled_synchronized_native_basic_lock_owner_sp_offset() { | |
| 670 return _compiled_synchronized_native_basic_lock_owner_sp_offset; | |
| 671 } | |
| 672 ByteSize compiled_synchronized_native_basic_lock_sp_offset() { | |
| 673 return _compiled_synchronized_native_basic_lock_sp_offset; | |
| 674 } | |
| 675 | |
| 676 // support for code generation | |
| 677 static int verified_entry_point_offset() { return offset_of(nmethod, _verified_entry_point); } | |
| 678 static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); } | |
| 679 static int entry_bci_offset() { return offset_of(nmethod, _entry_bci); } | |
| 680 | |
| 681 }; | |
| 682 | |
| 683 // Locks an nmethod so its code will not get removed, even if it is a zombie/not_entrant method | |
| 684 class nmethodLocker : public StackObj { | |
| 685 nmethod* _nm; | |
| 686 | |
| 687 static void lock_nmethod(nmethod* nm); // note: nm can be NULL | |
| 688 static void unlock_nmethod(nmethod* nm); // (ditto) | |
| 689 | |
| 690 public: | |
| 691 nmethodLocker(address pc); // derive nm from pc | |
| 692 nmethodLocker(nmethod *nm) { _nm = nm; lock_nmethod(_nm); } | |
| 693 nmethodLocker() { _nm = NULL; } | |
| 694 ~nmethodLocker() { unlock_nmethod(_nm); } | |
| 695 | |
| 696 nmethod* code() { return _nm; } | |
| 697 void set_code(nmethod* new_nm) { | |
| 698 unlock_nmethod(_nm); // note: This works even if _nm==new_nm. | |
| 699 _nm = new_nm; | |
| 700 lock_nmethod(_nm); | |
| 701 } | |
| 702 }; |