Mercurial > hg > graal-jvmci-8
annotate src/share/vm/code/nmethod.hpp @ 20269:9717199cb8de
8047373: Clean the ExceptionCache in one pass
Summary: Also-reviewed-by: kim.barrett@oracle.com
Reviewed-by: jmasa, jwilhelm
| author | stefank |
|---|---|
| date | Tue, 24 Jun 2014 17:09:48 +0200 |
| parents | 63e0c47ca943 |
| children | 2c6ef90f030a |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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" | |
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30 #include "oops/metadata.hpp" |
| 1972 | 31 |
| 0 | 32 // This class is used internally by nmethods, to cache |
| 33 // exception/pc/handler information. | |
| 34 | |
| 6197 | 35 class ExceptionCache : public CHeapObj<mtCode> { |
| 0 | 36 friend class VMStructs; |
| 37 private: | |
| 38 enum { cache_size = 16 }; | |
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39 Klass* _exception_type; |
| 0 | 40 address _pc[cache_size]; |
| 41 address _handler[cache_size]; | |
| 42 int _count; | |
| 43 ExceptionCache* _next; | |
| 44 | |
| 45 address pc_at(int index) { assert(index >= 0 && index < count(),""); return _pc[index]; } | |
| 46 void set_pc_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _pc[index] = a; } | |
| 47 address handler_at(int index) { assert(index >= 0 && index < count(),""); return _handler[index]; } | |
| 48 void set_handler_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _handler[index] = a; } | |
| 49 int count() { return _count; } | |
| 50 void increment_count() { _count++; } | |
| 51 | |
| 52 public: | |
| 53 | |
| 54 ExceptionCache(Handle exception, address pc, address handler); | |
| 55 | |
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56 Klass* exception_type() { return _exception_type; } |
| 0 | 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 }; | |
| 20227 | 72 // The array elements MUST be volatile! Several threads may modify |
| 73 // and read from the cache concurrently. find_pc_desc_internal has | |
| 74 // returned wrong results. C++ compiler (namely xlC12) may duplicate | |
| 75 // C++ field accesses if the elements are not volatile. | |
| 76 typedef PcDesc* PcDescPtr; | |
| 77 volatile PcDescPtr _pc_descs[cache_size]; // last cache_size pc_descs found | |
| 0 | 78 public: |
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79 PcDescCache() { debug_only(_pc_descs[0] = NULL); } |
| 0 | 80 void reset_to(PcDesc* initial_pc_desc); |
| 81 PcDesc* find_pc_desc(int pc_offset, bool approximate); | |
| 82 void add_pc_desc(PcDesc* pc_desc); | |
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83 PcDesc* last_pc_desc() { return _pc_descs[0]; } |
| 0 | 84 }; |
| 85 | |
| 86 | |
| 87 // nmethods (native methods) are the compiled code versions of Java methods. | |
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88 // |
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89 // An nmethod contains: |
| 0 | 90 // - header (the nmethod structure) |
| 91 // [Relocation] | |
| 92 // - relocation information | |
| 93 // - constant part (doubles, longs and floats used in nmethod) | |
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94 // - oop table |
| 0 | 95 // [Code] |
| 96 // - code body | |
| 97 // - exception handler | |
| 98 // - stub code | |
| 99 // [Debugging information] | |
| 100 // - oop array | |
| 101 // - data array | |
| 102 // - pcs | |
| 103 // [Exception handler table] | |
| 104 // - handler entry point array | |
| 105 // [Implicit Null Pointer exception table] | |
| 106 // - implicit null table array | |
| 107 | |
| 108 class Dependencies; | |
| 109 class ExceptionHandlerTable; | |
| 110 class ImplicitExceptionTable; | |
| 111 class AbstractCompiler; | |
| 112 class xmlStream; | |
| 113 | |
| 114 class nmethod : public CodeBlob { | |
| 115 friend class VMStructs; | |
| 116 friend class NMethodSweeper; | |
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117 friend class CodeCache; // scavengable oops |
| 0 | 118 private: |
| 119 // Shared fields for all nmethod's | |
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120 Method* _method; |
| 0 | 121 int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method |
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122 jmethodID _jmethod_id; // Cache of method()->jmethod_id() |
| 0 | 123 |
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124 // To support simple linked-list chaining of nmethods: |
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125 nmethod* _osr_link; // from InstanceKlass::osr_nmethods_head |
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126 nmethod* _scavenge_root_link; // from CodeCache::scavenge_root_nmethods |
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127 |
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128 static nmethod* volatile _oops_do_mark_nmethods; |
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129 nmethod* volatile _oops_do_mark_link; |
| 0 | 130 |
| 131 AbstractCompiler* _compiler; // The compiler which compiled this nmethod | |
| 132 | |
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133 // offsets for entry points |
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134 address _entry_point; // entry point with class check |
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135 address _verified_entry_point; // entry point without class check |
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136 address _osr_entry_point; // entry point for on stack replacement |
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137 |
| 0 | 138 // Offsets for different nmethod parts |
| 139 int _exception_offset; | |
| 1204 | 140 // All deoptee's will resume execution at this location described by |
| 141 // this offset. | |
| 0 | 142 int _deoptimize_offset; |
| 1204 | 143 // All deoptee's at a MethodHandle call site will resume execution |
| 144 // at this location described by this offset. | |
| 145 int _deoptimize_mh_offset; | |
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146 // Offset of the unwind handler if it exists |
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147 int _unwind_handler_offset; |
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148 |
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149 #ifdef HAVE_DTRACE_H |
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150 int _trap_offset; |
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151 #endif // def HAVE_DTRACE_H |
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152 int _consts_offset; |
| 0 | 153 int _stub_offset; |
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154 int _oops_offset; // offset to where embedded oop table begins (inside data) |
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155 int _metadata_offset; // embedded meta data table |
| 0 | 156 int _scopes_data_offset; |
| 157 int _scopes_pcs_offset; | |
| 158 int _dependencies_offset; | |
| 159 int _handler_table_offset; | |
| 160 int _nul_chk_table_offset; | |
| 161 int _nmethod_end_offset; | |
| 162 | |
| 163 // location in frame (offset for sp) that deopt can store the original | |
| 164 // pc during a deopt. | |
| 165 int _orig_pc_offset; | |
| 166 | |
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167 int _compile_id; // which compilation made this nmethod |
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168 int _comp_level; // compilation level |
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169 |
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170 // protected by CodeCache_lock |
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171 bool _has_flushed_dependencies; // Used for maintenance of dependencies (CodeCache_lock) |
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172 |
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173 bool _marked_for_reclamation; // Used by NMethodSweeper (set only by sweeper) |
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174 bool _marked_for_deoptimization; // Used for stack deoptimization |
| 0 | 175 |
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176 // used by jvmti to track if an unload event has been posted for this nmethod. |
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177 bool _unload_reported; |
| 0 | 178 |
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179 // set during construction |
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180 unsigned int _has_unsafe_access:1; // May fault due to unsafe access. |
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181 unsigned int _has_method_handle_invokes:1; // Has this method MethodHandle invokes? |
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182 unsigned int _lazy_critical_native:1; // Lazy JNI critical native |
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183 unsigned int _has_wide_vectors:1; // Preserve wide vectors at safepoints |
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184 |
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185 // Protected by Patching_lock |
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186 volatile unsigned char _state; // {alive, not_entrant, zombie, unloaded} |
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187 |
| 1726 | 188 #ifdef ASSERT |
| 189 bool _oops_are_stale; // indicates that it's no longer safe to access oops section | |
| 190 #endif | |
| 191 | |
| 13441 | 192 enum { in_use = 0, // executable nmethod |
| 193 not_entrant = 1, // marked for deoptimization but activations may still exist, | |
| 194 // will be transformed to zombie when all activations are gone | |
| 195 zombie = 2, // no activations exist, nmethod is ready for purge | |
| 196 unloaded = 3 }; // there should be no activations, should not be called, | |
| 197 // will be transformed to zombie immediately | |
| 0 | 198 |
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199 jbyte _scavenge_root_state; |
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200 |
| 17780 | 201 #if INCLUDE_RTM_OPT |
| 202 // RTM state at compile time. Used during deoptimization to decide | |
| 203 // whether to restart collecting RTM locking abort statistic again. | |
| 204 RTMState _rtm_state; | |
| 205 #endif | |
| 206 | |
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207 // Nmethod Flushing lock. If non-zero, then the nmethod is not removed |
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208 // and is not made into a zombie. However, once the nmethod is made into |
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209 // a zombie, it will be locked one final time if CompiledMethodUnload |
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210 // event processing needs to be done. |
| 0 | 211 jint _lock_count; |
| 212 | |
| 213 // not_entrant method removal. Each mark_sweep pass will update | |
| 214 // this mark to current sweep invocation count if it is seen on the | |
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215 // stack. An not_entrant method can be removed when there are no |
| 0 | 216 // more activations, i.e., when the _stack_traversal_mark is less than |
| 217 // current sweep traversal index. | |
| 218 long _stack_traversal_mark; | |
| 219 | |
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220 // The _hotness_counter indicates the hotness of a method. The higher |
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221 // the value the hotter the method. The hotness counter of a nmethod is |
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222 // set to [(ReservedCodeCacheSize / (1024 * 1024)) * 2] each time the method |
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223 // is active while stack scanning (mark_active_nmethods()). The hotness |
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224 // counter is decreased (by 1) while sweeping. |
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225 int _hotness_counter; |
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226 |
| 0 | 227 ExceptionCache *_exception_cache; |
| 228 PcDescCache _pc_desc_cache; | |
| 229 | |
| 2019 | 230 // These are used for compiled synchronized native methods to |
| 0 | 231 // locate the owner and stack slot for the BasicLock so that we can |
| 232 // properly revoke the bias of the owner if necessary. They are | |
| 233 // needed because there is no debug information for compiled native | |
| 234 // wrappers and the oop maps are insufficient to allow | |
| 235 // frame::retrieve_receiver() to work. Currently they are expected | |
| 236 // to be byte offsets from the Java stack pointer for maximum code | |
| 237 // sharing between platforms. Note that currently biased locking | |
| 238 // will never cause Class instances to be biased but this code | |
| 239 // handles the static synchronized case as well. | |
| 2019 | 240 // JVMTI's GetLocalInstance() also uses these offsets to find the receiver |
| 241 // for non-static native wrapper frames. | |
| 242 ByteSize _native_receiver_sp_offset; | |
| 243 ByteSize _native_basic_lock_sp_offset; | |
| 0 | 244 |
| 245 friend class nmethodLocker; | |
| 246 | |
| 247 // For native wrappers | |
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248 nmethod(Method* method, |
| 0 | 249 int nmethod_size, |
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250 int compile_id, |
| 0 | 251 CodeOffsets* offsets, |
| 252 CodeBuffer *code_buffer, | |
| 253 int frame_size, | |
| 254 ByteSize basic_lock_owner_sp_offset, /* synchronized natives only */ | |
| 255 ByteSize basic_lock_sp_offset, /* synchronized natives only */ | |
| 256 OopMapSet* oop_maps); | |
| 257 | |
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258 #ifdef HAVE_DTRACE_H |
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259 // For native wrappers |
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260 nmethod(Method* method, |
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261 int nmethod_size, |
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262 CodeOffsets* offsets, |
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263 CodeBuffer *code_buffer, |
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264 int frame_size); |
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265 #endif // def HAVE_DTRACE_H |
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266 |
| 0 | 267 // Creation support |
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268 nmethod(Method* method, |
| 0 | 269 int nmethod_size, |
| 270 int compile_id, | |
| 271 int entry_bci, | |
| 272 CodeOffsets* offsets, | |
| 273 int orig_pc_offset, | |
| 274 DebugInformationRecorder *recorder, | |
| 275 Dependencies* dependencies, | |
| 276 CodeBuffer *code_buffer, | |
| 277 int frame_size, | |
| 278 OopMapSet* oop_maps, | |
| 279 ExceptionHandlerTable* handler_table, | |
| 280 ImplicitExceptionTable* nul_chk_table, | |
| 281 AbstractCompiler* compiler, | |
| 282 int comp_level); | |
| 283 | |
| 284 // helper methods | |
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285 void* operator new(size_t size, int nmethod_size) throw(); |
| 0 | 286 |
| 287 const char* reloc_string_for(u_char* begin, u_char* end); | |
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288 // Returns true if this thread changed the state of the nmethod or |
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289 // false if another thread performed the transition. |
| 1141 | 290 bool make_not_entrant_or_zombie(unsigned int state); |
| 0 | 291 void inc_decompile_count(); |
| 292 | |
| 293 // Used to manipulate the exception cache | |
| 294 void add_exception_cache_entry(ExceptionCache* new_entry); | |
| 295 ExceptionCache* exception_cache_entry_for_exception(Handle exception); | |
| 296 | |
| 297 // Inform external interfaces that a compiled method has been unloaded | |
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298 void post_compiled_method_unload(); |
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299 |
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300 // Initailize fields to their default values |
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301 void init_defaults(); |
| 0 | 302 |
| 303 public: | |
| 304 // create nmethod with entry_bci | |
| 305 static nmethod* new_nmethod(methodHandle method, | |
| 306 int compile_id, | |
| 307 int entry_bci, | |
| 308 CodeOffsets* offsets, | |
| 309 int orig_pc_offset, | |
| 310 DebugInformationRecorder* recorder, | |
| 311 Dependencies* dependencies, | |
| 312 CodeBuffer *code_buffer, | |
| 313 int frame_size, | |
| 314 OopMapSet* oop_maps, | |
| 315 ExceptionHandlerTable* handler_table, | |
| 316 ImplicitExceptionTable* nul_chk_table, | |
| 317 AbstractCompiler* compiler, | |
| 318 int comp_level); | |
| 319 | |
| 320 static nmethod* new_native_nmethod(methodHandle method, | |
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321 int compile_id, |
| 0 | 322 CodeBuffer *code_buffer, |
| 323 int vep_offset, | |
| 324 int frame_complete, | |
| 325 int frame_size, | |
| 326 ByteSize receiver_sp_offset, | |
| 327 ByteSize basic_lock_sp_offset, | |
| 328 OopMapSet* oop_maps); | |
| 329 | |
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330 #ifdef HAVE_DTRACE_H |
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331 // The method we generate for a dtrace probe has to look |
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332 // like an nmethod as far as the rest of the system is concerned |
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333 // which is somewhat unfortunate. |
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334 static nmethod* new_dtrace_nmethod(methodHandle method, |
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335 CodeBuffer *code_buffer, |
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336 int vep_offset, |
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337 int trap_offset, |
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338 int frame_complete, |
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339 int frame_size); |
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340 |
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341 int trap_offset() const { return _trap_offset; } |
| 1748 | 342 address trap_address() const { return insts_begin() + _trap_offset; } |
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343 |
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344 #endif // def HAVE_DTRACE_H |
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345 |
| 0 | 346 // accessors |
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347 Method* method() const { return _method; } |
| 0 | 348 AbstractCompiler* compiler() const { return _compiler; } |
| 349 | |
| 350 // type info | |
| 351 bool is_nmethod() const { return true; } | |
| 352 bool is_java_method() const { return !method()->is_native(); } | |
| 353 bool is_native_method() const { return method()->is_native(); } | |
| 354 bool is_osr_method() const { return _entry_bci != InvocationEntryBci; } | |
| 355 | |
| 356 bool is_compiled_by_c1() const; | |
| 357 bool is_compiled_by_c2() const; | |
| 1692 | 358 bool is_compiled_by_shark() const; |
| 0 | 359 |
| 360 // boundaries for different parts | |
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361 address consts_begin () const { return header_begin() + _consts_offset ; } |
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362 address consts_end () const { return header_begin() + code_offset() ; } |
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363 address insts_begin () const { return header_begin() + code_offset() ; } |
| 1748 | 364 address insts_end () const { return header_begin() + _stub_offset ; } |
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365 address stub_begin () const { return header_begin() + _stub_offset ; } |
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366 address stub_end () const { return header_begin() + _oops_offset ; } |
| 1204 | 367 address exception_begin () const { return header_begin() + _exception_offset ; } |
| 368 address deopt_handler_begin () const { return header_begin() + _deoptimize_offset ; } | |
| 369 address deopt_mh_handler_begin() const { return header_begin() + _deoptimize_mh_offset ; } | |
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370 address unwind_handler_begin () const { return _unwind_handler_offset != -1 ? (header_begin() + _unwind_handler_offset) : NULL; } |
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371 oop* oops_begin () const { return (oop*) (header_begin() + _oops_offset) ; } |
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372 oop* oops_end () const { return (oop*) (header_begin() + _metadata_offset) ; } |
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373 |
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374 Metadata** metadata_begin () const { return (Metadata**) (header_begin() + _metadata_offset) ; } |
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375 Metadata** metadata_end () const { return (Metadata**) (header_begin() + _scopes_data_offset) ; } |
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376 |
| 1204 | 377 address scopes_data_begin () const { return header_begin() + _scopes_data_offset ; } |
| 378 address scopes_data_end () const { return header_begin() + _scopes_pcs_offset ; } | |
| 379 PcDesc* scopes_pcs_begin () const { return (PcDesc*)(header_begin() + _scopes_pcs_offset ); } | |
| 380 PcDesc* scopes_pcs_end () const { return (PcDesc*)(header_begin() + _dependencies_offset) ; } | |
| 381 address dependencies_begin () const { return header_begin() + _dependencies_offset ; } | |
| 382 address dependencies_end () const { return header_begin() + _handler_table_offset ; } | |
| 383 address handler_table_begin () const { return header_begin() + _handler_table_offset ; } | |
| 384 address handler_table_end () const { return header_begin() + _nul_chk_table_offset ; } | |
| 385 address nul_chk_table_begin () const { return header_begin() + _nul_chk_table_offset ; } | |
| 386 address nul_chk_table_end () const { return header_begin() + _nmethod_end_offset ; } | |
| 0 | 387 |
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388 // Sizes |
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389 int consts_size () const { return consts_end () - consts_begin (); } |
| 1748 | 390 int insts_size () const { return insts_end () - insts_begin (); } |
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391 int stub_size () const { return stub_end () - stub_begin (); } |
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392 int oops_size () const { return (address) oops_end () - (address) oops_begin (); } |
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393 int metadata_size () const { return (address) metadata_end () - (address) metadata_begin (); } |
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394 int scopes_data_size () const { return scopes_data_end () - scopes_data_begin (); } |
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395 int scopes_pcs_size () const { return (intptr_t) scopes_pcs_end () - (intptr_t) scopes_pcs_begin (); } |
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396 int dependencies_size () const { return dependencies_end () - dependencies_begin (); } |
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397 int handler_table_size() const { return handler_table_end() - handler_table_begin(); } |
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398 int nul_chk_table_size() const { return nul_chk_table_end() - nul_chk_table_begin(); } |
| 0 | 399 |
| 400 int total_size () const; | |
| 401 | |
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402 void dec_hotness_counter() { _hotness_counter--; } |
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403 void set_hotness_counter(int val) { _hotness_counter = val; } |
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404 int hotness_counter() const { return _hotness_counter; } |
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405 |
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406 // Containment |
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407 bool consts_contains (address addr) const { return consts_begin () <= addr && addr < consts_end (); } |
| 1748 | 408 bool insts_contains (address addr) const { return insts_begin () <= addr && addr < insts_end (); } |
| 0 | 409 bool stub_contains (address addr) const { return stub_begin () <= addr && addr < stub_end (); } |
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410 bool oops_contains (oop* addr) const { return oops_begin () <= addr && addr < oops_end (); } |
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411 bool metadata_contains (Metadata** addr) const { return metadata_begin () <= addr && addr < metadata_end (); } |
| 0 | 412 bool scopes_data_contains (address addr) const { return scopes_data_begin () <= addr && addr < scopes_data_end (); } |
| 413 bool scopes_pcs_contains (PcDesc* addr) const { return scopes_pcs_begin () <= addr && addr < scopes_pcs_end (); } | |
| 414 bool handler_table_contains(address addr) const { return handler_table_begin() <= addr && addr < handler_table_end(); } | |
| 415 bool nul_chk_table_contains(address addr) const { return nul_chk_table_begin() <= addr && addr < nul_chk_table_end(); } | |
| 416 | |
| 417 // entry points | |
| 418 address entry_point() const { return _entry_point; } // normal entry point | |
| 419 address verified_entry_point() const { return _verified_entry_point; } // if klass is correct | |
| 420 | |
| 421 // flag accessing and manipulation | |
| 13441 | 422 bool is_in_use() const { return _state == in_use; } |
| 423 bool is_alive() const { return _state == in_use || _state == not_entrant; } | |
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424 bool is_not_entrant() const { return _state == not_entrant; } |
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425 bool is_zombie() const { return _state == zombie; } |
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426 bool is_unloaded() const { return _state == unloaded; } |
| 0 | 427 |
| 17780 | 428 #if INCLUDE_RTM_OPT |
| 429 // rtm state accessing and manipulating | |
| 430 RTMState rtm_state() const { return _rtm_state; } | |
| 431 void set_rtm_state(RTMState state) { _rtm_state = state; } | |
| 432 #endif | |
| 433 | |
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434 // Make the nmethod non entrant. The nmethod will continue to be |
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435 // alive. It is used when an uncommon trap happens. Returns true |
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436 // if this thread changed the state of the nmethod or false if |
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437 // another thread performed the transition. |
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438 bool make_not_entrant() { return make_not_entrant_or_zombie(not_entrant); } |
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439 bool make_zombie() { return make_not_entrant_or_zombie(zombie); } |
| 0 | 440 |
| 441 // used by jvmti to track if the unload event has been reported | |
| 442 bool unload_reported() { return _unload_reported; } | |
| 443 void set_unload_reported() { _unload_reported = true; } | |
| 444 | |
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445 bool is_marked_for_deoptimization() const { return _marked_for_deoptimization; } |
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446 void mark_for_deoptimization() { _marked_for_deoptimization = true; } |
| 0 | 447 |
| 448 void make_unloaded(BoolObjectClosure* is_alive, oop cause); | |
| 449 | |
| 450 bool has_dependencies() { return dependencies_size() != 0; } | |
| 451 void flush_dependencies(BoolObjectClosure* is_alive); | |
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452 bool has_flushed_dependencies() { return _has_flushed_dependencies; } |
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453 void set_has_flushed_dependencies() { |
| 0 | 454 assert(!has_flushed_dependencies(), "should only happen once"); |
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455 _has_flushed_dependencies = 1; |
| 0 | 456 } |
| 457 | |
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458 bool is_marked_for_reclamation() const { return _marked_for_reclamation; } |
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459 void mark_for_reclamation() { _marked_for_reclamation = 1; } |
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460 |
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461 bool has_unsafe_access() const { return _has_unsafe_access; } |
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462 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; } |
| 0 | 463 |
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464 bool has_method_handle_invokes() const { return _has_method_handle_invokes; } |
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465 void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; } |
| 0 | 466 |
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467 bool is_lazy_critical_native() const { return _lazy_critical_native; } |
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468 void set_lazy_critical_native(bool z) { _lazy_critical_native = z; } |
| 1202 | 469 |
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470 bool has_wide_vectors() const { return _has_wide_vectors; } |
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471 void set_has_wide_vectors(bool z) { _has_wide_vectors = z; } |
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472 |
| 0 | 473 int comp_level() const { return _comp_level; } |
| 474 | |
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475 // Support for oops in scopes and relocs: |
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476 // Note: index 0 is reserved for null. |
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477 oop oop_at(int index) const { return index == 0 ? (oop) NULL: *oop_addr_at(index); } |
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478 oop* oop_addr_at(int index) const { // for GC |
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479 // relocation indexes are biased by 1 (because 0 is reserved) |
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480 assert(index > 0 && index <= oops_size(), "must be a valid non-zero index"); |
| 1726 | 481 assert(!_oops_are_stale, "oops are stale"); |
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482 return &oops_begin()[index - 1]; |
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483 } |
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484 |
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485 // Support for meta data in scopes and relocs: |
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486 // Note: index 0 is reserved for null. |
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487 Metadata* metadata_at(int index) const { return index == 0 ? NULL: *metadata_addr_at(index); } |
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488 Metadata** metadata_addr_at(int index) const { // for GC |
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489 // relocation indexes are biased by 1 (because 0 is reserved) |
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490 assert(index > 0 && index <= metadata_size(), "must be a valid non-zero index"); |
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491 return &metadata_begin()[index - 1]; |
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492 } |
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493 |
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494 void copy_values(GrowableArray<jobject>* oops); |
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495 void copy_values(GrowableArray<Metadata*>* metadata); |
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496 |
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497 // Relocation support |
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498 private: |
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499 void fix_oop_relocations(address begin, address end, bool initialize_immediates); |
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500 inline void initialize_immediate_oop(oop* dest, jobject handle); |
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501 |
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502 public: |
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503 void fix_oop_relocations(address begin, address end) { fix_oop_relocations(begin, end, false); } |
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504 void fix_oop_relocations() { fix_oop_relocations(NULL, NULL, false); } |
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505 void verify_oop_relocations(); |
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506 |
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507 bool is_at_poll_return(address pc); |
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508 bool is_at_poll_or_poll_return(address pc); |
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509 |
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510 // Scavengable oop support |
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511 bool on_scavenge_root_list() const { return (_scavenge_root_state & 1) != 0; } |
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512 protected: |
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513 enum { sl_on_list = 0x01, sl_marked = 0x10 }; |
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514 void set_on_scavenge_root_list() { _scavenge_root_state = sl_on_list; } |
|
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515 void clear_on_scavenge_root_list() { _scavenge_root_state = 0; } |
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516 // assertion-checking and pruning logic uses the bits of _scavenge_root_state |
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517 #ifndef PRODUCT |
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518 void set_scavenge_root_marked() { _scavenge_root_state |= sl_marked; } |
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519 void clear_scavenge_root_marked() { _scavenge_root_state &= ~sl_marked; } |
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520 bool scavenge_root_not_marked() { return (_scavenge_root_state &~ sl_on_list) == 0; } |
|
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521 // N.B. there is no positive marked query, and we only use the not_marked query for asserts. |
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522 #endif //PRODUCT |
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523 nmethod* scavenge_root_link() const { return _scavenge_root_link; } |
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524 void set_scavenge_root_link(nmethod *n) { _scavenge_root_link = n; } |
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525 |
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526 public: |
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527 |
| 0 | 528 // Sweeper support |
| 529 long stack_traversal_mark() { return _stack_traversal_mark; } | |
| 530 void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; } | |
| 531 | |
| 532 // Exception cache support | |
| 533 ExceptionCache* exception_cache() const { return _exception_cache; } | |
| 534 void set_exception_cache(ExceptionCache *ec) { _exception_cache = ec; } | |
| 535 address handler_for_exception_and_pc(Handle exception, address pc); | |
| 536 void add_handler_for_exception_and_pc(Handle exception, address pc, address handler); | |
| 20269 | 537 void clean_exception_cache(BoolObjectClosure* is_alive); |
| 0 | 538 |
| 539 // implicit exceptions support | |
| 540 address continuation_for_implicit_exception(address pc); | |
| 541 | |
| 542 // On-stack replacement support | |
|
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543 int osr_entry_bci() const { assert(is_osr_method(), "wrong kind of nmethod"); return _entry_bci; } |
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544 address osr_entry() const { assert(is_osr_method(), "wrong kind of nmethod"); return _osr_entry_point; } |
| 0 | 545 void invalidate_osr_method(); |
|
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546 nmethod* osr_link() const { return _osr_link; } |
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547 void set_osr_link(nmethod *n) { _osr_link = n; } |
| 0 | 548 |
| 549 // tells whether frames described by this nmethod can be deoptimized | |
| 550 // note: native wrappers cannot be deoptimized. | |
| 551 bool can_be_deoptimized() const { return is_java_method(); } | |
| 552 | |
| 553 // Inline cache support | |
| 554 void clear_inline_caches(); | |
| 555 void cleanup_inline_caches(); | |
| 556 bool inlinecache_check_contains(address addr) const { | |
| 1748 | 557 return (addr >= code_begin() && addr < verified_entry_point()); |
| 0 | 558 } |
| 559 | |
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560 // Check that all metadata is still alive |
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561 void verify_metadata_loaders(address low_boundary, BoolObjectClosure* is_alive); |
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562 |
| 0 | 563 // unlink and deallocate this nmethod |
| 564 // Only NMethodSweeper class is expected to use this. NMethodSweeper is not | |
| 565 // expected to use any other private methods/data in this class. | |
| 566 | |
| 567 protected: | |
| 568 void flush(); | |
| 569 | |
| 570 public: | |
|
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571 // When true is returned, it is unsafe to remove this nmethod even if |
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572 // it is a zombie, since the VM or the ServiceThread might still be |
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573 // using it. |
| 0 | 574 bool is_locked_by_vm() const { return _lock_count >0; } |
| 575 | |
| 576 // See comment at definition of _last_seen_on_stack | |
| 577 void mark_as_seen_on_stack(); | |
| 578 bool can_not_entrant_be_converted(); | |
| 579 | |
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580 // Evolution support. We make old (discarded) compiled methods point to new Method*s. |
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581 void set_method(Method* method) { _method = method; } |
| 0 | 582 |
| 583 // GC support | |
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584 void do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred); |
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585 bool can_unload(BoolObjectClosure* is_alive, oop* root, bool unloading_occurred); |
| 0 | 586 |
| 587 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, | |
| 588 OopClosure* f); | |
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589 void oops_do(OopClosure* f) { oops_do(f, false); } |
| 12080 | 590 void oops_do(OopClosure* f, bool allow_zombie); |
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591 bool detect_scavenge_root_oops(); |
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592 void verify_scavenge_root_oops() PRODUCT_RETURN; |
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593 |
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594 bool test_set_oops_do_mark(); |
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595 static void oops_do_marking_prologue(); |
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596 static void oops_do_marking_epilogue(); |
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597 static bool oops_do_marking_is_active() { return _oops_do_mark_nmethods != NULL; } |
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598 bool test_oops_do_mark() { return _oops_do_mark_link != NULL; } |
| 0 | 599 |
| 600 // ScopeDesc for an instruction | |
| 601 ScopeDesc* scope_desc_at(address pc); | |
| 602 | |
| 603 private: | |
| 604 ScopeDesc* scope_desc_in(address begin, address end); | |
| 605 | |
| 1204 | 606 address* orig_pc_addr(const frame* fr) { return (address*) ((address)fr->unextended_sp() + _orig_pc_offset); } |
| 0 | 607 |
| 608 PcDesc* find_pc_desc_internal(address pc, bool approximate); | |
| 609 | |
| 610 PcDesc* find_pc_desc(address pc, bool approximate) { | |
| 611 PcDesc* desc = _pc_desc_cache.last_pc_desc(); | |
| 1748 | 612 if (desc != NULL && desc->pc_offset() == pc - code_begin()) { |
| 0 | 613 return desc; |
| 614 } | |
| 615 return find_pc_desc_internal(pc, approximate); | |
| 616 } | |
| 617 | |
| 618 public: | |
| 619 // ScopeDesc retrieval operation | |
| 620 PcDesc* pc_desc_at(address pc) { return find_pc_desc(pc, false); } | |
| 621 // pc_desc_near returns the first PcDesc at or after the givne pc. | |
| 622 PcDesc* pc_desc_near(address pc) { return find_pc_desc(pc, true); } | |
| 623 | |
| 624 public: | |
| 625 // copying of debugging information | |
| 626 void copy_scopes_pcs(PcDesc* pcs, int count); | |
| 627 void copy_scopes_data(address buffer, int size); | |
| 628 | |
| 1204 | 629 // Deopt |
| 630 // Return true is the PC is one would expect if the frame is being deopted. | |
| 631 bool is_deopt_pc (address pc) { return is_deopt_entry(pc) || is_deopt_mh_entry(pc); } | |
| 632 bool is_deopt_entry (address pc) { return pc == deopt_handler_begin(); } | |
| 633 bool is_deopt_mh_entry(address pc) { return pc == deopt_mh_handler_begin(); } | |
| 0 | 634 // Accessor/mutator for the original pc of a frame before a frame was deopted. |
| 635 address get_original_pc(const frame* fr) { return *orig_pc_addr(fr); } | |
| 636 void set_original_pc(const frame* fr, address pc) { *orig_pc_addr(fr) = pc; } | |
| 637 | |
| 1204 | 638 static address get_deopt_original_pc(const frame* fr); |
| 639 | |
|
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640 // MethodHandle |
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641 bool is_method_handle_return(address return_pc); |
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642 |
| 0 | 643 // jvmti support: |
| 644 void post_compiled_method_load_event(); | |
|
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645 jmethodID get_and_cache_jmethod_id(); |
| 0 | 646 |
| 647 // verify operations | |
| 648 void verify(); | |
| 649 void verify_scopes(); | |
| 650 void verify_interrupt_point(address interrupt_point); | |
| 651 | |
| 652 // printing support | |
|
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653 void print() const; |
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654 void print_code(); |
| 0 | 655 void print_relocations() PRODUCT_RETURN; |
| 656 void print_pcs() PRODUCT_RETURN; | |
| 657 void print_scopes() PRODUCT_RETURN; | |
| 658 void print_dependencies() PRODUCT_RETURN; | |
| 659 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
| 660 void print_calls(outputStream* st) PRODUCT_RETURN; | |
| 661 void print_handler_table() PRODUCT_RETURN; | |
| 662 void print_nul_chk_table() PRODUCT_RETURN; | |
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663 void print_nmethod(bool print_code); |
| 0 | 664 |
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665 // need to re-define this from CodeBlob else the overload hides it |
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666 virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); } |
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667 void print_on(outputStream* st, const char* msg) const; |
| 0 | 668 |
| 669 // Logging | |
| 670 void log_identity(xmlStream* log) const; | |
| 671 void log_new_nmethod() const; | |
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672 void log_state_change() const; |
| 0 | 673 |
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674 // Prints block-level comments, including nmethod specific block labels: |
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675 virtual void print_block_comment(outputStream* stream, address block_begin) const { |
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676 print_nmethod_labels(stream, block_begin); |
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677 CodeBlob::print_block_comment(stream, block_begin); |
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678 } |
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679 void print_nmethod_labels(outputStream* stream, address block_begin) const; |
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680 |
| 0 | 681 // Prints a comment for one native instruction (reloc info, pc desc) |
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682 void print_code_comment_on(outputStream* st, int column, address begin, address end); |
| 0 | 683 static void print_statistics() PRODUCT_RETURN; |
| 684 | |
| 685 // Compiler task identification. Note that all OSR methods | |
| 686 // are numbered in an independent sequence if CICountOSR is true, | |
| 687 // and native method wrappers are also numbered independently if | |
| 688 // CICountNative is true. | |
| 689 int compile_id() const { return _compile_id; } | |
| 690 const char* compile_kind() const; | |
| 691 | |
| 692 // For debugging | |
| 693 // CompiledIC* IC_at(char* p) const; | |
| 694 // PrimitiveIC* primitiveIC_at(char* p) const; | |
| 695 oop embeddedOop_at(address p); | |
| 696 | |
| 697 // tells if any of this method's dependencies have been invalidated | |
| 698 // (this is expensive!) | |
| 699 bool check_all_dependencies(); | |
| 700 | |
| 701 // tells if this compiled method is dependent on the given changes, | |
| 702 // and the changes have invalidated it | |
| 703 bool check_dependency_on(DepChange& changes); | |
| 704 | |
| 705 // Evolution support. Tells if this compiled method is dependent on any of | |
| 706 // methods m() of class dependee, such that if m() in dependee is replaced, | |
| 707 // this compiled method will have to be deoptimized. | |
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708 bool is_evol_dependent_on(Klass* dependee); |
| 0 | 709 |
| 710 // Fast breakpoint support. Tells if this compiled method is | |
| 711 // dependent on the given method. Returns true if this nmethod | |
| 712 // corresponds to the given method as well. | |
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713 bool is_dependent_on_method(Method* dependee); |
| 0 | 714 |
| 715 // is it ok to patch at address? | |
| 716 bool is_patchable_at(address instr_address); | |
| 717 | |
| 718 // UseBiasedLocking support | |
| 2019 | 719 ByteSize native_receiver_sp_offset() { |
| 720 return _native_receiver_sp_offset; | |
| 0 | 721 } |
| 2019 | 722 ByteSize native_basic_lock_sp_offset() { |
| 723 return _native_basic_lock_sp_offset; | |
| 0 | 724 } |
| 725 | |
| 726 // support for code generation | |
| 727 static int verified_entry_point_offset() { return offset_of(nmethod, _verified_entry_point); } | |
| 728 static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); } | |
| 729 static int entry_bci_offset() { return offset_of(nmethod, _entry_bci); } | |
| 730 | |
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731 // RedefineClasses support. Mark metadata in nmethods as on_stack so that |
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732 // redefine classes doesn't purge it. |
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733 static void mark_on_stack(nmethod* nm) { |
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734 nm->metadata_do(Metadata::mark_on_stack); |
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735 } |
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736 void metadata_do(void f(Metadata*)); |
| 0 | 737 }; |
| 738 | |
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739 // Locks an nmethod so its code will not get removed and it will not |
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740 // be made into a zombie, even if it is a not_entrant method. After the |
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741 // nmethod becomes a zombie, if CompiledMethodUnload event processing |
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742 // needs to be done, then lock_nmethod() is used directly to keep the |
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743 // generated code from being reused too early. |
| 0 | 744 class nmethodLocker : public StackObj { |
| 745 nmethod* _nm; | |
| 746 | |
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747 public: |
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748 |
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749 // note: nm can be NULL |
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750 // Only JvmtiDeferredEvent::compiled_method_unload_event() |
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751 // should pass zombie_ok == true. |
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752 static void lock_nmethod(nmethod* nm, bool zombie_ok = false); |
| 0 | 753 static void unlock_nmethod(nmethod* nm); // (ditto) |
| 754 | |
| 755 nmethodLocker(address pc); // derive nm from pc | |
| 756 nmethodLocker(nmethod *nm) { _nm = nm; lock_nmethod(_nm); } | |
| 757 nmethodLocker() { _nm = NULL; } | |
| 758 ~nmethodLocker() { unlock_nmethod(_nm); } | |
| 759 | |
| 760 nmethod* code() { return _nm; } | |
| 761 void set_code(nmethod* new_nm) { | |
| 762 unlock_nmethod(_nm); // note: This works even if _nm==new_nm. | |
| 763 _nm = new_nm; | |
| 764 lock_nmethod(_nm); | |
| 765 } | |
| 766 }; | |
| 1972 | 767 |
| 768 #endif // SHARE_VM_CODE_NMETHOD_HPP |