Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.hpp @ 4970:33df1aeaebbf
Merge with http://hg.openjdk.java.net/hsx/hsx24/hotspot/
| author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
|---|---|
| date | Mon, 27 Feb 2012 13:10:13 +0100 |
| parents | ef00461e29af 0382d2b469b2 |
| children | 2f2c6347fce4 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_CODE_NMETHOD_HPP |
| 26 #define SHARE_VM_CODE_NMETHOD_HPP | |
| 27 | |
| 28 #include "code/codeBlob.hpp" | |
| 29 #include "code/pcDesc.hpp" | |
| 30 | |
| 0 | 31 // This class is used internally by nmethods, to cache |
| 32 // exception/pc/handler information. | |
| 33 | |
| 34 class ExceptionCache : public CHeapObj { | |
| 35 friend class VMStructs; | |
| 36 private: | |
| 37 enum { cache_size = 16 }; | |
| 38 klassOop _exception_type; | |
| 39 address _pc[cache_size]; | |
| 40 address _handler[cache_size]; | |
| 41 int _count; | |
| 42 ExceptionCache* _next; | |
| 43 | |
| 44 address pc_at(int index) { assert(index >= 0 && index < count(),""); return _pc[index]; } | |
| 45 void set_pc_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _pc[index] = a; } | |
| 46 address handler_at(int index) { assert(index >= 0 && index < count(),""); return _handler[index]; } | |
| 47 void set_handler_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _handler[index] = a; } | |
| 48 int count() { return _count; } | |
| 49 void increment_count() { _count++; } | |
| 50 | |
| 51 public: | |
| 52 | |
| 53 ExceptionCache(Handle exception, address pc, address handler); | |
| 54 | |
| 55 klassOop exception_type() { return _exception_type; } | |
| 56 klassOop* exception_type_addr() { return &_exception_type; } | |
| 57 ExceptionCache* next() { return _next; } | |
| 58 void set_next(ExceptionCache *ec) { _next = ec; } | |
| 59 | |
| 60 address match(Handle exception, address pc); | |
| 61 bool match_exception_with_space(Handle exception) ; | |
| 62 address test_address(address addr); | |
| 63 bool add_address_and_handler(address addr, address handler) ; | |
| 64 }; | |
| 65 | |
| 66 | |
| 67 // cache pc descs found in earlier inquiries | |
| 68 class PcDescCache VALUE_OBJ_CLASS_SPEC { | |
| 69 friend class VMStructs; | |
| 70 private: | |
| 71 enum { cache_size = 4 }; | |
| 72 PcDesc* _pc_descs[cache_size]; // last cache_size pc_descs found | |
| 73 public: | |
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74 PcDescCache() { debug_only(_pc_descs[0] = NULL); } |
| 0 | 75 void reset_to(PcDesc* initial_pc_desc); |
| 76 PcDesc* find_pc_desc(int pc_offset, bool approximate); | |
| 77 void add_pc_desc(PcDesc* pc_desc); | |
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78 PcDesc* last_pc_desc() { return _pc_descs[0]; } |
| 0 | 79 }; |
| 80 | |
| 81 | |
| 82 // nmethods (native methods) are the compiled code versions of Java methods. | |
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83 // |
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84 // An nmethod contains: |
| 0 | 85 // - header (the nmethod structure) |
| 86 // [Relocation] | |
| 87 // - relocation information | |
| 88 // - constant part (doubles, longs and floats used in nmethod) | |
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89 // - oop table |
| 0 | 90 // [Code] |
| 91 // - code body | |
| 92 // - exception handler | |
| 93 // - stub code | |
| 94 // [Debugging information] | |
| 95 // - oop array | |
| 96 // - data array | |
| 97 // - pcs | |
| 98 // [Exception handler table] | |
| 99 // - handler entry point array | |
| 100 // [Implicit Null Pointer exception table] | |
| 101 // - implicit null table array | |
| 102 | |
| 103 class Dependencies; | |
| 104 class ExceptionHandlerTable; | |
| 105 class ImplicitExceptionTable; | |
| 106 class AbstractCompiler; | |
| 107 class xmlStream; | |
| 108 | |
| 109 class nmethod : public CodeBlob { | |
| 110 friend class VMStructs; | |
| 111 friend class NMethodSweeper; | |
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112 friend class CodeCache; // scavengable oops |
| 0 | 113 private: |
| 114 // Shared fields for all nmethod's | |
| 115 methodOop _method; | |
| 116 int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method | |
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117 jmethodID _jmethod_id; // Cache of method()->jmethod_id() |
| 0 | 118 |
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119 oop _graal_compiled_method; |
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120 |
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121 // To support simple linked-list chaining of nmethods: |
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122 nmethod* _osr_link; // from instanceKlass::osr_nmethods_head |
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123 nmethod* _scavenge_root_link; // from CodeCache::scavenge_root_nmethods |
| 1202 | 124 nmethod* _saved_nmethod_link; // from CodeCache::speculatively_disconnect |
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125 |
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126 static nmethod* volatile _oops_do_mark_nmethods; |
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127 nmethod* volatile _oops_do_mark_link; |
| 0 | 128 |
| 129 AbstractCompiler* _compiler; // The compiler which compiled this nmethod | |
| 130 | |
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131 // offsets for entry points |
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132 address _entry_point; // entry point with class check |
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133 address _verified_entry_point; // entry point without class check |
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134 address _osr_entry_point; // entry point for on stack replacement |
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135 |
| 0 | 136 // Offsets for different nmethod parts |
| 137 int _exception_offset; | |
| 1204 | 138 // All deoptee's will resume execution at this location described by |
| 139 // this offset. | |
| 0 | 140 int _deoptimize_offset; |
| 1204 | 141 // All deoptee's at a MethodHandle call site will resume execution |
| 142 // at this location described by this offset. | |
| 143 int _deoptimize_mh_offset; | |
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144 // Offset of the unwind handler if it exists |
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145 int _unwind_handler_offset; |
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146 |
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147 #ifdef HAVE_DTRACE_H |
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148 int _trap_offset; |
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149 #endif // def HAVE_DTRACE_H |
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150 int _consts_offset; |
| 0 | 151 int _stub_offset; |
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152 int _oops_offset; // offset to where embedded oop table begins (inside data) |
| 0 | 153 int _scopes_data_offset; |
| 154 int _scopes_pcs_offset; | |
| 155 int _dependencies_offset; | |
| 156 int _handler_table_offset; | |
| 157 int _nul_chk_table_offset; | |
| 158 int _nmethod_end_offset; | |
| 159 | |
| 160 // location in frame (offset for sp) that deopt can store the original | |
| 161 // pc during a deopt. | |
| 162 int _orig_pc_offset; | |
| 163 | |
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164 int _compile_id; // which compilation made this nmethod |
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165 int _comp_level; // compilation level |
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166 |
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167 // protected by CodeCache_lock |
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168 bool _has_flushed_dependencies; // Used for maintenance of dependencies (CodeCache_lock) |
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169 bool _speculatively_disconnected; // Marked for potential unload |
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170 |
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171 bool _marked_for_reclamation; // Used by NMethodSweeper (set only by sweeper) |
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172 bool _marked_for_deoptimization; // Used for stack deoptimization |
| 0 | 173 |
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174 // used by jvmti to track if an unload event has been posted for this nmethod. |
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175 bool _unload_reported; |
| 0 | 176 |
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177 // set during construction |
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178 unsigned int _has_unsafe_access:1; // May fault due to unsafe access. |
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179 unsigned int _has_method_handle_invokes:1; // Has this method MethodHandle invokes? |
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180 unsigned int _lazy_critical_native:1; // Lazy JNI critical native |
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181 |
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182 // Protected by Patching_lock |
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183 unsigned char _state; // {alive, not_entrant, zombie, unloaded} |
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184 |
| 1726 | 185 #ifdef ASSERT |
| 186 bool _oops_are_stale; // indicates that it's no longer safe to access oops section | |
| 187 #endif | |
| 188 | |
| 0 | 189 enum { alive = 0, |
| 605 | 190 not_entrant = 1, // uncommon trap has happened but activations may still exist |
| 0 | 191 zombie = 2, |
| 192 unloaded = 3 }; | |
| 193 | |
| 194 | |
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195 jbyte _scavenge_root_state; |
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196 |
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197 // Nmethod Flushing lock. If non-zero, then the nmethod is not removed |
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198 // and is not made into a zombie. However, once the nmethod is made into |
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199 // a zombie, it will be locked one final time if CompiledMethodUnload |
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200 // event processing needs to be done. |
| 0 | 201 jint _lock_count; |
| 202 | |
| 203 // not_entrant method removal. Each mark_sweep pass will update | |
| 204 // this mark to current sweep invocation count if it is seen on the | |
| 205 // stack. An not_entrant method can be removed when there is no | |
| 206 // more activations, i.e., when the _stack_traversal_mark is less than | |
| 207 // current sweep traversal index. | |
| 208 long _stack_traversal_mark; | |
| 209 | |
| 210 ExceptionCache *_exception_cache; | |
| 211 PcDescCache _pc_desc_cache; | |
| 212 | |
| 2019 | 213 // These are used for compiled synchronized native methods to |
| 0 | 214 // locate the owner and stack slot for the BasicLock so that we can |
| 215 // properly revoke the bias of the owner if necessary. They are | |
| 216 // needed because there is no debug information for compiled native | |
| 217 // wrappers and the oop maps are insufficient to allow | |
| 218 // frame::retrieve_receiver() to work. Currently they are expected | |
| 219 // to be byte offsets from the Java stack pointer for maximum code | |
| 220 // sharing between platforms. Note that currently biased locking | |
| 221 // will never cause Class instances to be biased but this code | |
| 222 // handles the static synchronized case as well. | |
| 2019 | 223 // JVMTI's GetLocalInstance() also uses these offsets to find the receiver |
| 224 // for non-static native wrapper frames. | |
| 225 ByteSize _native_receiver_sp_offset; | |
| 226 ByteSize _native_basic_lock_sp_offset; | |
| 0 | 227 |
| 228 friend class nmethodLocker; | |
| 229 | |
| 230 // For native wrappers | |
| 231 nmethod(methodOop method, | |
| 232 int nmethod_size, | |
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233 int compile_id, |
| 0 | 234 CodeOffsets* offsets, |
| 235 CodeBuffer *code_buffer, | |
| 236 int frame_size, | |
| 237 ByteSize basic_lock_owner_sp_offset, /* synchronized natives only */ | |
| 238 ByteSize basic_lock_sp_offset, /* synchronized natives only */ | |
| 239 OopMapSet* oop_maps); | |
| 240 | |
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241 #ifdef HAVE_DTRACE_H |
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242 // For native wrappers |
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243 nmethod(methodOop method, |
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244 int nmethod_size, |
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245 CodeOffsets* offsets, |
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246 CodeBuffer *code_buffer, |
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247 int frame_size); |
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248 #endif // def HAVE_DTRACE_H |
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249 |
| 0 | 250 // Creation support |
| 251 nmethod(methodOop method, | |
| 252 int nmethod_size, | |
| 253 int compile_id, | |
| 254 int entry_bci, | |
| 255 CodeOffsets* offsets, | |
| 256 int orig_pc_offset, | |
| 257 DebugInformationRecorder *recorder, | |
| 258 Dependencies* dependencies, | |
| 259 CodeBuffer *code_buffer, | |
| 260 int frame_size, | |
| 261 OopMapSet* oop_maps, | |
| 262 ExceptionHandlerTable* handler_table, | |
| 263 ImplicitExceptionTable* nul_chk_table, | |
| 264 AbstractCompiler* compiler, | |
| 265 int comp_level); | |
| 266 | |
| 267 // helper methods | |
| 268 void* operator new(size_t size, int nmethod_size); | |
| 269 | |
| 270 const char* reloc_string_for(u_char* begin, u_char* end); | |
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271 // Returns true if this thread changed the state of the nmethod or |
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272 // false if another thread performed the transition. |
| 1141 | 273 bool make_not_entrant_or_zombie(unsigned int state); |
| 0 | 274 void inc_decompile_count(); |
| 275 | |
| 276 // Used to manipulate the exception cache | |
| 277 void add_exception_cache_entry(ExceptionCache* new_entry); | |
| 278 ExceptionCache* exception_cache_entry_for_exception(Handle exception); | |
| 279 | |
| 280 // Inform external interfaces that a compiled method has been unloaded | |
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281 void post_compiled_method_unload(); |
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282 |
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283 // Initailize fields to their default values |
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284 void init_defaults(); |
| 0 | 285 |
| 286 public: | |
| 287 // create nmethod with entry_bci | |
| 288 static nmethod* new_nmethod(methodHandle method, | |
| 289 int compile_id, | |
| 290 int entry_bci, | |
| 291 CodeOffsets* offsets, | |
| 292 int orig_pc_offset, | |
| 293 DebugInformationRecorder* recorder, | |
| 294 Dependencies* dependencies, | |
| 295 CodeBuffer *code_buffer, | |
| 296 int frame_size, | |
| 297 OopMapSet* oop_maps, | |
| 298 ExceptionHandlerTable* handler_table, | |
| 299 ImplicitExceptionTable* nul_chk_table, | |
| 300 AbstractCompiler* compiler, | |
| 301 int comp_level); | |
| 302 | |
| 303 static nmethod* new_native_nmethod(methodHandle method, | |
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304 int compile_id, |
| 0 | 305 CodeBuffer *code_buffer, |
| 306 int vep_offset, | |
| 307 int frame_complete, | |
| 308 int frame_size, | |
| 309 ByteSize receiver_sp_offset, | |
| 310 ByteSize basic_lock_sp_offset, | |
| 311 OopMapSet* oop_maps); | |
| 312 | |
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313 #ifdef HAVE_DTRACE_H |
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314 // The method we generate for a dtrace probe has to look |
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315 // like an nmethod as far as the rest of the system is concerned |
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316 // which is somewhat unfortunate. |
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317 static nmethod* new_dtrace_nmethod(methodHandle method, |
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318 CodeBuffer *code_buffer, |
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319 int vep_offset, |
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320 int trap_offset, |
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321 int frame_complete, |
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322 int frame_size); |
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323 |
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324 int trap_offset() const { return _trap_offset; } |
| 1748 | 325 address trap_address() const { return insts_begin() + _trap_offset; } |
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326 |
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327 #endif // def HAVE_DTRACE_H |
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328 |
| 0 | 329 // accessors |
| 330 methodOop method() const { return _method; } | |
| 331 AbstractCompiler* compiler() const { return _compiler; } | |
| 332 | |
| 333 // type info | |
| 334 bool is_nmethod() const { return true; } | |
| 335 bool is_java_method() const { return !method()->is_native(); } | |
| 336 bool is_native_method() const { return method()->is_native(); } | |
| 337 bool is_osr_method() const { return _entry_bci != InvocationEntryBci; } | |
| 338 | |
| 339 bool is_compiled_by_c1() const; | |
| 340 bool is_compiled_by_c2() const; | |
| 1692 | 341 bool is_compiled_by_shark() const; |
| 0 | 342 |
| 343 // boundaries for different parts | |
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344 address consts_begin () const { return header_begin() + _consts_offset ; } |
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345 address consts_end () const { return header_begin() + code_offset() ; } |
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346 address insts_begin () const { return header_begin() + code_offset() ; } |
| 1748 | 347 address insts_end () const { return header_begin() + _stub_offset ; } |
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348 address stub_begin () const { return header_begin() + _stub_offset ; } |
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349 address stub_end () const { return header_begin() + _oops_offset ; } |
| 1204 | 350 address exception_begin () const { return header_begin() + _exception_offset ; } |
| 351 address deopt_handler_begin () const { return header_begin() + _deoptimize_offset ; } | |
| 352 address deopt_mh_handler_begin() const { return header_begin() + _deoptimize_mh_offset ; } | |
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353 address unwind_handler_begin () const { return _unwind_handler_offset != -1 ? (header_begin() + _unwind_handler_offset) : NULL; } |
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354 oop* oops_begin () const { return (oop*) (header_begin() + _oops_offset) ; } |
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355 oop* oops_end () const { return (oop*) (header_begin() + _scopes_data_offset) ; } |
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356 |
| 1204 | 357 address scopes_data_begin () const { return header_begin() + _scopes_data_offset ; } |
| 358 address scopes_data_end () const { return header_begin() + _scopes_pcs_offset ; } | |
| 359 PcDesc* scopes_pcs_begin () const { return (PcDesc*)(header_begin() + _scopes_pcs_offset ); } | |
| 360 PcDesc* scopes_pcs_end () const { return (PcDesc*)(header_begin() + _dependencies_offset) ; } | |
| 361 address dependencies_begin () const { return header_begin() + _dependencies_offset ; } | |
| 362 address dependencies_end () const { return header_begin() + _handler_table_offset ; } | |
| 363 address handler_table_begin () const { return header_begin() + _handler_table_offset ; } | |
| 364 address handler_table_end () const { return header_begin() + _nul_chk_table_offset ; } | |
| 365 address nul_chk_table_begin () const { return header_begin() + _nul_chk_table_offset ; } | |
| 366 address nul_chk_table_end () const { return header_begin() + _nmethod_end_offset ; } | |
| 0 | 367 |
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368 // Sizes |
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369 int consts_size () const { return consts_end () - consts_begin (); } |
| 1748 | 370 int insts_size () const { return insts_end () - insts_begin (); } |
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371 int stub_size () const { return stub_end () - stub_begin (); } |
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372 int oops_size () const { return (address) oops_end () - (address) oops_begin (); } |
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373 int scopes_data_size () const { return scopes_data_end () - scopes_data_begin (); } |
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374 int scopes_pcs_size () const { return (intptr_t) scopes_pcs_end () - (intptr_t) scopes_pcs_begin (); } |
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375 int dependencies_size () const { return dependencies_end () - dependencies_begin (); } |
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376 int handler_table_size() const { return handler_table_end() - handler_table_begin(); } |
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377 int nul_chk_table_size() const { return nul_chk_table_end() - nul_chk_table_begin(); } |
| 0 | 378 |
| 379 int total_size () const; | |
| 380 | |
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381 // Containment |
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382 bool consts_contains (address addr) const { return consts_begin () <= addr && addr < consts_end (); } |
| 1748 | 383 bool insts_contains (address addr) const { return insts_begin () <= addr && addr < insts_end (); } |
| 0 | 384 bool stub_contains (address addr) const { return stub_begin () <= addr && addr < stub_end (); } |
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385 bool oops_contains (oop* addr) const { return oops_begin () <= addr && addr < oops_end (); } |
| 0 | 386 bool scopes_data_contains (address addr) const { return scopes_data_begin () <= addr && addr < scopes_data_end (); } |
| 387 bool scopes_pcs_contains (PcDesc* addr) const { return scopes_pcs_begin () <= addr && addr < scopes_pcs_end (); } | |
| 388 bool handler_table_contains(address addr) const { return handler_table_begin() <= addr && addr < handler_table_end(); } | |
| 389 bool nul_chk_table_contains(address addr) const { return nul_chk_table_begin() <= addr && addr < nul_chk_table_end(); } | |
| 390 | |
| 391 // entry points | |
| 392 address entry_point() const { return _entry_point; } // normal entry point | |
| 393 address verified_entry_point() const { return _verified_entry_point; } // if klass is correct | |
| 394 | |
| 395 // flag accessing and manipulation | |
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396 bool is_in_use() const { return _state == alive; } |
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397 bool is_alive() const { return _state == alive || _state == not_entrant; } |
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398 bool is_not_entrant() const { return _state == not_entrant; } |
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399 bool is_zombie() const { return _state == zombie; } |
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400 bool is_unloaded() const { return _state == unloaded; } |
| 0 | 401 |
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402 // Make the nmethod non entrant. The nmethod will continue to be |
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403 // alive. It is used when an uncommon trap happens. Returns true |
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404 // if this thread changed the state of the nmethod or false if |
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405 // another thread performed the transition. |
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406 bool make_not_entrant() { return make_not_entrant_or_zombie(not_entrant); } |
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407 bool make_zombie() { return make_not_entrant_or_zombie(zombie); } |
| 0 | 408 |
| 409 // used by jvmti to track if the unload event has been reported | |
| 410 bool unload_reported() { return _unload_reported; } | |
| 411 void set_unload_reported() { _unload_reported = true; } | |
| 412 | |
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413 bool is_marked_for_deoptimization() const { return _marked_for_deoptimization; } |
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414 void mark_for_deoptimization() { _marked_for_deoptimization = true; } |
| 0 | 415 |
| 416 void make_unloaded(BoolObjectClosure* is_alive, oop cause); | |
| 417 | |
| 418 bool has_dependencies() { return dependencies_size() != 0; } | |
| 419 void flush_dependencies(BoolObjectClosure* is_alive); | |
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420 bool has_flushed_dependencies() { return _has_flushed_dependencies; } |
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421 void set_has_flushed_dependencies() { |
| 0 | 422 assert(!has_flushed_dependencies(), "should only happen once"); |
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423 _has_flushed_dependencies = 1; |
| 0 | 424 } |
| 425 | |
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426 bool is_marked_for_reclamation() const { return _marked_for_reclamation; } |
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427 void mark_for_reclamation() { _marked_for_reclamation = 1; } |
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428 |
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429 bool has_unsafe_access() const { return _has_unsafe_access; } |
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430 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; } |
| 0 | 431 |
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432 bool has_method_handle_invokes() const { return _has_method_handle_invokes; } |
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433 void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; } |
| 0 | 434 |
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435 bool is_speculatively_disconnected() const { return _speculatively_disconnected; } |
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436 void set_speculatively_disconnected(bool z) { _speculatively_disconnected = z; } |
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437 |
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438 bool is_lazy_critical_native() const { return _lazy_critical_native; } |
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439 void set_lazy_critical_native(bool z) { _lazy_critical_native = z; } |
| 1202 | 440 |
| 0 | 441 int comp_level() const { return _comp_level; } |
| 442 | |
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443 // Support for oops in scopes and relocs: |
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444 // Note: index 0 is reserved for null. |
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445 oop oop_at(int index) const { return index == 0 ? (oop) NULL: *oop_addr_at(index); } |
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446 oop* oop_addr_at(int index) const { // for GC |
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447 // relocation indexes are biased by 1 (because 0 is reserved) |
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448 assert(index > 0 && index <= oops_size(), "must be a valid non-zero index"); |
| 1726 | 449 assert(!_oops_are_stale, "oops are stale"); |
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450 return &oops_begin()[index - 1]; |
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451 } |
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452 |
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453 void copy_oops(GrowableArray<jobject>* oops); |
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454 |
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455 // Relocation support |
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456 private: |
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457 void fix_oop_relocations(address begin, address end, bool initialize_immediates); |
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458 inline void initialize_immediate_oop(oop* dest, jobject handle); |
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459 |
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460 public: |
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461 void fix_oop_relocations(address begin, address end) { fix_oop_relocations(begin, end, false); } |
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462 void fix_oop_relocations() { fix_oop_relocations(NULL, NULL, false); } |
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463 void verify_oop_relocations(); |
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464 |
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465 bool is_at_poll_return(address pc); |
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466 bool is_at_poll_or_poll_return(address pc); |
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467 |
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468 // Scavengable oop support |
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469 bool on_scavenge_root_list() const { return (_scavenge_root_state & 1) != 0; } |
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470 protected: |
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471 enum { sl_on_list = 0x01, sl_marked = 0x10 }; |
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472 void set_on_scavenge_root_list() { _scavenge_root_state = sl_on_list; } |
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473 void clear_on_scavenge_root_list() { _scavenge_root_state = 0; } |
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474 // assertion-checking and pruning logic uses the bits of _scavenge_root_state |
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475 #ifndef PRODUCT |
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476 void set_scavenge_root_marked() { _scavenge_root_state |= sl_marked; } |
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477 void clear_scavenge_root_marked() { _scavenge_root_state &= ~sl_marked; } |
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478 bool scavenge_root_not_marked() { return (_scavenge_root_state &~ sl_on_list) == 0; } |
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479 // N.B. there is no positive marked query, and we only use the not_marked query for asserts. |
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480 #endif //PRODUCT |
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481 nmethod* scavenge_root_link() const { return _scavenge_root_link; } |
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482 void set_scavenge_root_link(nmethod *n) { _scavenge_root_link = n; } |
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483 |
| 1202 | 484 nmethod* saved_nmethod_link() const { return _saved_nmethod_link; } |
| 485 void set_saved_nmethod_link(nmethod *n) { _saved_nmethod_link = n; } | |
| 486 | |
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487 public: |
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488 |
| 0 | 489 // Sweeper support |
| 490 long stack_traversal_mark() { return _stack_traversal_mark; } | |
| 491 void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; } | |
| 492 | |
| 493 // Exception cache support | |
| 494 ExceptionCache* exception_cache() const { return _exception_cache; } | |
| 495 void set_exception_cache(ExceptionCache *ec) { _exception_cache = ec; } | |
| 496 address handler_for_exception_and_pc(Handle exception, address pc); | |
| 497 void add_handler_for_exception_and_pc(Handle exception, address pc, address handler); | |
| 498 void remove_from_exception_cache(ExceptionCache* ec); | |
| 499 | |
| 500 // implicit exceptions support | |
| 501 address continuation_for_implicit_exception(address pc); | |
| 502 | |
| 503 // On-stack replacement support | |
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504 int osr_entry_bci() const { assert(is_osr_method(), "wrong kind of nmethod"); return _entry_bci; } |
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505 address osr_entry() const { assert(is_osr_method(), "wrong kind of nmethod"); return _osr_entry_point; } |
| 0 | 506 void invalidate_osr_method(); |
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507 nmethod* osr_link() const { return _osr_link; } |
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508 void set_osr_link(nmethod *n) { _osr_link = n; } |
| 0 | 509 |
| 510 // tells whether frames described by this nmethod can be deoptimized | |
| 511 // note: native wrappers cannot be deoptimized. | |
| 512 bool can_be_deoptimized() const { return is_java_method(); } | |
| 513 | |
| 514 // Inline cache support | |
| 515 void clear_inline_caches(); | |
| 516 void cleanup_inline_caches(); | |
| 517 bool inlinecache_check_contains(address addr) const { | |
| 1748 | 518 return (addr >= code_begin() && addr < verified_entry_point()); |
| 0 | 519 } |
| 520 | |
| 521 // unlink and deallocate this nmethod | |
| 522 // Only NMethodSweeper class is expected to use this. NMethodSweeper is not | |
| 523 // expected to use any other private methods/data in this class. | |
| 524 | |
| 525 protected: | |
| 526 void flush(); | |
| 527 | |
| 528 public: | |
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529 // When true is returned, it is unsafe to remove this nmethod even if |
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530 // it is a zombie, since the VM or the ServiceThread might still be |
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531 // using it. |
| 0 | 532 bool is_locked_by_vm() const { return _lock_count >0; } |
| 533 | |
| 534 // See comment at definition of _last_seen_on_stack | |
| 535 void mark_as_seen_on_stack(); | |
| 536 bool can_not_entrant_be_converted(); | |
| 537 | |
| 538 // Evolution support. We make old (discarded) compiled methods point to new methodOops. | |
| 539 void set_method(methodOop method) { _method = method; } | |
| 540 | |
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541 |
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542 oop graal_compiled_method() { return _graal_compiled_method; } |
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543 void set_graal_compiled_method(oop compiled_method) { _graal_compiled_method = compiled_method; } |
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544 |
| 0 | 545 // GC support |
| 546 void do_unloading(BoolObjectClosure* is_alive, OopClosure* keep_alive, | |
| 547 bool unloading_occurred); | |
| 548 bool can_unload(BoolObjectClosure* is_alive, OopClosure* keep_alive, | |
| 549 oop* root, bool unloading_occurred); | |
| 550 | |
| 551 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, | |
| 552 OopClosure* f); | |
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553 void oops_do(OopClosure* f) { oops_do(f, false); } |
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554 void oops_do(OopClosure* f, bool do_strong_roots_only); |
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555 bool detect_scavenge_root_oops(); |
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556 void verify_scavenge_root_oops() PRODUCT_RETURN; |
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557 |
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558 bool test_set_oops_do_mark(); |
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559 static void oops_do_marking_prologue(); |
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560 static void oops_do_marking_epilogue(); |
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561 static bool oops_do_marking_is_active() { return _oops_do_mark_nmethods != NULL; } |
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562 DEBUG_ONLY(bool test_oops_do_mark() { return _oops_do_mark_link != NULL; }) |
| 0 | 563 |
| 564 // ScopeDesc for an instruction | |
| 565 ScopeDesc* scope_desc_at(address pc); | |
| 566 | |
| 567 private: | |
| 568 ScopeDesc* scope_desc_in(address begin, address end); | |
| 569 | |
| 1204 | 570 address* orig_pc_addr(const frame* fr) { return (address*) ((address)fr->unextended_sp() + _orig_pc_offset); } |
| 0 | 571 |
| 572 PcDesc* find_pc_desc_internal(address pc, bool approximate); | |
| 573 | |
| 574 PcDesc* find_pc_desc(address pc, bool approximate) { | |
| 575 PcDesc* desc = _pc_desc_cache.last_pc_desc(); | |
| 1748 | 576 if (desc != NULL && desc->pc_offset() == pc - code_begin()) { |
| 0 | 577 return desc; |
| 578 } | |
| 579 return find_pc_desc_internal(pc, approximate); | |
| 580 } | |
| 581 | |
| 582 public: | |
| 583 // ScopeDesc retrieval operation | |
| 584 PcDesc* pc_desc_at(address pc) { return find_pc_desc(pc, false); } | |
| 585 // pc_desc_near returns the first PcDesc at or after the givne pc. | |
| 586 PcDesc* pc_desc_near(address pc) { return find_pc_desc(pc, true); } | |
| 587 | |
| 588 public: | |
| 589 // copying of debugging information | |
| 590 void copy_scopes_pcs(PcDesc* pcs, int count); | |
| 591 void copy_scopes_data(address buffer, int size); | |
| 592 | |
| 1204 | 593 // Deopt |
| 594 // Return true is the PC is one would expect if the frame is being deopted. | |
| 595 bool is_deopt_pc (address pc) { return is_deopt_entry(pc) || is_deopt_mh_entry(pc); } | |
|
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596 |
|
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597 // (tw) When using graal, the address might be off by 5 (because this is the size of the call instruction. |
|
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598 // (tw) TODO: Replace this by a more general mechanism. |
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599 bool is_deopt_entry (address pc) { return pc == deopt_handler_begin() IS_GRAAL( || pc == deopt_handler_begin() + 5); } |
| 1204 | 600 bool is_deopt_mh_entry(address pc) { return pc == deopt_mh_handler_begin(); } |
| 0 | 601 // Accessor/mutator for the original pc of a frame before a frame was deopted. |
| 602 address get_original_pc(const frame* fr) { return *orig_pc_addr(fr); } | |
| 603 void set_original_pc(const frame* fr, address pc) { *orig_pc_addr(fr) = pc; } | |
| 604 | |
| 1204 | 605 static address get_deopt_original_pc(const frame* fr); |
| 606 | |
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607 // MethodHandle |
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608 bool is_method_handle_return(address return_pc); |
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609 |
| 0 | 610 // jvmti support: |
| 611 void post_compiled_method_load_event(); | |
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612 jmethodID get_and_cache_jmethod_id(); |
| 0 | 613 |
| 614 // verify operations | |
| 615 void verify(); | |
| 616 void verify_scopes(); | |
| 617 void verify_interrupt_point(address interrupt_point); | |
| 618 | |
| 619 // printing support | |
|
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620 void print() const; |
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621 void print_code(); |
| 0 | 622 void print_relocations() PRODUCT_RETURN; |
| 623 void print_pcs() PRODUCT_RETURN; | |
| 624 void print_scopes() PRODUCT_RETURN; | |
| 625 void print_dependencies() PRODUCT_RETURN; | |
| 626 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
| 627 void print_calls(outputStream* st) PRODUCT_RETURN; | |
| 628 void print_handler_table() PRODUCT_RETURN; | |
| 629 void print_nul_chk_table() PRODUCT_RETURN; | |
|
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630 void print_nmethod(bool print_code); |
| 0 | 631 |
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632 // need to re-define this from CodeBlob else the overload hides it |
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633 virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); } |
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634 void print_on(outputStream* st, const char* msg) const; |
| 0 | 635 |
| 636 // Logging | |
| 637 void log_identity(xmlStream* log) const; | |
| 638 void log_new_nmethod() const; | |
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639 void log_state_change() const; |
| 0 | 640 |
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641 // Prints block-level comments, including nmethod specific block labels: |
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642 virtual void print_block_comment(outputStream* stream, address block_begin) { |
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643 print_nmethod_labels(stream, block_begin); |
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644 CodeBlob::print_block_comment(stream, block_begin); |
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645 } |
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646 void print_nmethod_labels(outputStream* stream, address block_begin); |
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647 |
| 0 | 648 // Prints a comment for one native instruction (reloc info, pc desc) |
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649 void print_code_comment_on(outputStream* st, int column, address begin, address end); |
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650 static void print_statistics(); |
| 0 | 651 |
| 652 // Compiler task identification. Note that all OSR methods | |
| 653 // are numbered in an independent sequence if CICountOSR is true, | |
| 654 // and native method wrappers are also numbered independently if | |
| 655 // CICountNative is true. | |
| 656 int compile_id() const { return _compile_id; } | |
| 657 const char* compile_kind() const; | |
| 658 | |
| 659 // For debugging | |
| 660 // CompiledIC* IC_at(char* p) const; | |
| 661 // PrimitiveIC* primitiveIC_at(char* p) const; | |
| 662 oop embeddedOop_at(address p); | |
| 663 | |
| 664 // tells if any of this method's dependencies have been invalidated | |
| 665 // (this is expensive!) | |
| 666 bool check_all_dependencies(); | |
| 667 | |
| 668 // tells if this compiled method is dependent on the given changes, | |
| 669 // and the changes have invalidated it | |
| 670 bool check_dependency_on(DepChange& changes); | |
| 671 | |
| 672 // Evolution support. Tells if this compiled method is dependent on any of | |
| 673 // methods m() of class dependee, such that if m() in dependee is replaced, | |
| 674 // this compiled method will have to be deoptimized. | |
| 675 bool is_evol_dependent_on(klassOop dependee); | |
| 676 | |
| 677 // Fast breakpoint support. Tells if this compiled method is | |
| 678 // dependent on the given method. Returns true if this nmethod | |
| 679 // corresponds to the given method as well. | |
| 680 bool is_dependent_on_method(methodOop dependee); | |
| 681 | |
| 682 // is it ok to patch at address? | |
| 683 bool is_patchable_at(address instr_address); | |
| 684 | |
| 685 // UseBiasedLocking support | |
| 2019 | 686 ByteSize native_receiver_sp_offset() { |
| 687 return _native_receiver_sp_offset; | |
| 0 | 688 } |
| 2019 | 689 ByteSize native_basic_lock_sp_offset() { |
| 690 return _native_basic_lock_sp_offset; | |
| 0 | 691 } |
| 692 | |
| 693 // support for code generation | |
| 694 static int verified_entry_point_offset() { return offset_of(nmethod, _verified_entry_point); } | |
| 695 static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); } | |
| 696 static int entry_bci_offset() { return offset_of(nmethod, _entry_bci); } | |
| 697 | |
| 698 }; | |
| 699 | |
|
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700 // Locks an nmethod so its code will not get removed and it will not |
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701 // be made into a zombie, even if it is a not_entrant method. After the |
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702 // nmethod becomes a zombie, if CompiledMethodUnload event processing |
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703 // needs to be done, then lock_nmethod() is used directly to keep the |
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704 // generated code from being reused too early. |
| 0 | 705 class nmethodLocker : public StackObj { |
| 706 nmethod* _nm; | |
| 707 | |
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708 public: |
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709 |
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710 // note: nm can be NULL |
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711 // Only JvmtiDeferredEvent::compiled_method_unload_event() |
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712 // should pass zombie_ok == true. |
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713 static void lock_nmethod(nmethod* nm, bool zombie_ok = false); |
| 0 | 714 static void unlock_nmethod(nmethod* nm); // (ditto) |
| 715 | |
| 716 nmethodLocker(address pc); // derive nm from pc | |
| 717 nmethodLocker(nmethod *nm) { _nm = nm; lock_nmethod(_nm); } | |
| 718 nmethodLocker() { _nm = NULL; } | |
| 719 ~nmethodLocker() { unlock_nmethod(_nm); } | |
| 720 | |
| 721 nmethod* code() { return _nm; } | |
| 722 void set_code(nmethod* new_nm) { | |
| 723 unlock_nmethod(_nm); // note: This works even if _nm==new_nm. | |
| 724 _nm = new_nm; | |
| 725 lock_nmethod(_nm); | |
| 726 } | |
| 727 }; | |
| 1972 | 728 |
| 729 #endif // SHARE_VM_CODE_NMETHOD_HPP |