Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.hpp @ 4279:cdcd26f86af5
Helper class for slow paths
author | Christian Wimmer <Christian.Wimmer@Oracle.com> |
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date | Thu, 12 Jan 2012 13:46:26 -0800 |
parents | 04b9a2566eec |
children | 723df37192d6 35ca3ade314d |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2011, 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 |
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181 // Protected by Patching_lock |
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182 unsigned char _state; // {alive, not_entrant, zombie, unloaded} |
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183 |
1726 | 184 #ifdef ASSERT |
185 bool _oops_are_stale; // indicates that it's no longer safe to access oops section | |
186 #endif | |
187 | |
0 | 188 enum { alive = 0, |
605 | 189 not_entrant = 1, // uncommon trap has happened but activations may still exist |
0 | 190 zombie = 2, |
191 unloaded = 3 }; | |
192 | |
193 | |
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194 jbyte _scavenge_root_state; |
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195 |
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196 // Nmethod Flushing lock. If non-zero, then the nmethod is not removed |
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197 // and is not made into a zombie. However, once the nmethod is made into |
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198 // a zombie, it will be locked one final time if CompiledMethodUnload |
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199 // event processing needs to be done. |
0 | 200 jint _lock_count; |
201 | |
202 // not_entrant method removal. Each mark_sweep pass will update | |
203 // this mark to current sweep invocation count if it is seen on the | |
204 // stack. An not_entrant method can be removed when there is no | |
205 // more activations, i.e., when the _stack_traversal_mark is less than | |
206 // current sweep traversal index. | |
207 long _stack_traversal_mark; | |
208 | |
209 ExceptionCache *_exception_cache; | |
210 PcDescCache _pc_desc_cache; | |
211 | |
2019 | 212 // These are used for compiled synchronized native methods to |
0 | 213 // locate the owner and stack slot for the BasicLock so that we can |
214 // properly revoke the bias of the owner if necessary. They are | |
215 // needed because there is no debug information for compiled native | |
216 // wrappers and the oop maps are insufficient to allow | |
217 // frame::retrieve_receiver() to work. Currently they are expected | |
218 // to be byte offsets from the Java stack pointer for maximum code | |
219 // sharing between platforms. Note that currently biased locking | |
220 // will never cause Class instances to be biased but this code | |
221 // handles the static synchronized case as well. | |
2019 | 222 // JVMTI's GetLocalInstance() also uses these offsets to find the receiver |
223 // for non-static native wrapper frames. | |
224 ByteSize _native_receiver_sp_offset; | |
225 ByteSize _native_basic_lock_sp_offset; | |
0 | 226 |
227 friend class nmethodLocker; | |
228 | |
229 // For native wrappers | |
230 nmethod(methodOop method, | |
231 int nmethod_size, | |
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232 int compile_id, |
0 | 233 CodeOffsets* offsets, |
234 CodeBuffer *code_buffer, | |
235 int frame_size, | |
236 ByteSize basic_lock_owner_sp_offset, /* synchronized natives only */ | |
237 ByteSize basic_lock_sp_offset, /* synchronized natives only */ | |
238 OopMapSet* oop_maps); | |
239 | |
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240 #ifdef HAVE_DTRACE_H |
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241 // For native wrappers |
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242 nmethod(methodOop method, |
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243 int nmethod_size, |
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244 CodeOffsets* offsets, |
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245 CodeBuffer *code_buffer, |
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246 int frame_size); |
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247 #endif // def HAVE_DTRACE_H |
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248 |
0 | 249 // Creation support |
250 nmethod(methodOop method, | |
251 int nmethod_size, | |
252 int compile_id, | |
253 int entry_bci, | |
254 CodeOffsets* offsets, | |
255 int orig_pc_offset, | |
256 DebugInformationRecorder *recorder, | |
257 Dependencies* dependencies, | |
258 CodeBuffer *code_buffer, | |
259 int frame_size, | |
260 OopMapSet* oop_maps, | |
261 ExceptionHandlerTable* handler_table, | |
262 ImplicitExceptionTable* nul_chk_table, | |
263 AbstractCompiler* compiler, | |
264 int comp_level); | |
265 | |
266 // helper methods | |
267 void* operator new(size_t size, int nmethod_size); | |
268 | |
269 const char* reloc_string_for(u_char* begin, u_char* end); | |
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270 // Returns true if this thread changed the state of the nmethod or |
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271 // false if another thread performed the transition. |
1141 | 272 bool make_not_entrant_or_zombie(unsigned int state); |
0 | 273 void inc_decompile_count(); |
274 | |
275 // Used to manipulate the exception cache | |
276 void add_exception_cache_entry(ExceptionCache* new_entry); | |
277 ExceptionCache* exception_cache_entry_for_exception(Handle exception); | |
278 | |
279 // Inform external interfaces that a compiled method has been unloaded | |
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280 void post_compiled_method_unload(); |
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281 |
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282 // Initailize fields to their default values |
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283 void init_defaults(); |
0 | 284 |
285 public: | |
286 // create nmethod with entry_bci | |
287 static nmethod* new_nmethod(methodHandle method, | |
288 int compile_id, | |
289 int entry_bci, | |
290 CodeOffsets* offsets, | |
291 int orig_pc_offset, | |
292 DebugInformationRecorder* recorder, | |
293 Dependencies* dependencies, | |
294 CodeBuffer *code_buffer, | |
295 int frame_size, | |
296 OopMapSet* oop_maps, | |
297 ExceptionHandlerTable* handler_table, | |
298 ImplicitExceptionTable* nul_chk_table, | |
299 AbstractCompiler* compiler, | |
300 int comp_level); | |
301 | |
302 static nmethod* new_native_nmethod(methodHandle method, | |
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303 int compile_id, |
0 | 304 CodeBuffer *code_buffer, |
305 int vep_offset, | |
306 int frame_complete, | |
307 int frame_size, | |
308 ByteSize receiver_sp_offset, | |
309 ByteSize basic_lock_sp_offset, | |
310 OopMapSet* oop_maps); | |
311 | |
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312 #ifdef HAVE_DTRACE_H |
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313 // The method we generate for a dtrace probe has to look |
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314 // like an nmethod as far as the rest of the system is concerned |
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315 // which is somewhat unfortunate. |
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316 static nmethod* new_dtrace_nmethod(methodHandle method, |
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317 CodeBuffer *code_buffer, |
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318 int vep_offset, |
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319 int trap_offset, |
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320 int frame_complete, |
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321 int frame_size); |
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322 |
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323 int trap_offset() const { return _trap_offset; } |
1748 | 324 address trap_address() const { return insts_begin() + _trap_offset; } |
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325 |
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326 #endif // def HAVE_DTRACE_H |
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327 |
0 | 328 // accessors |
329 methodOop method() const { return _method; } | |
330 AbstractCompiler* compiler() const { return _compiler; } | |
331 | |
332 // type info | |
333 bool is_nmethod() const { return true; } | |
334 bool is_java_method() const { return !method()->is_native(); } | |
335 bool is_native_method() const { return method()->is_native(); } | |
336 bool is_osr_method() const { return _entry_bci != InvocationEntryBci; } | |
337 | |
338 bool is_compiled_by_c1() const; | |
339 bool is_compiled_by_c2() const; | |
1692 | 340 bool is_compiled_by_shark() const; |
0 | 341 |
342 // boundaries for different parts | |
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343 address consts_begin () const { return header_begin() + _consts_offset ; } |
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344 address consts_end () const { return header_begin() + code_offset() ; } |
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345 address insts_begin () const { return header_begin() + code_offset() ; } |
1748 | 346 address insts_end () const { return header_begin() + _stub_offset ; } |
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347 address stub_begin () const { return header_begin() + _stub_offset ; } |
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348 address stub_end () const { return header_begin() + _oops_offset ; } |
1204 | 349 address exception_begin () const { return header_begin() + _exception_offset ; } |
350 address deopt_handler_begin () const { return header_begin() + _deoptimize_offset ; } | |
351 address deopt_mh_handler_begin() const { return header_begin() + _deoptimize_mh_offset ; } | |
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352 address unwind_handler_begin () const { return _unwind_handler_offset != -1 ? (header_begin() + _unwind_handler_offset) : NULL; } |
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353 oop* oops_begin () const { return (oop*) (header_begin() + _oops_offset) ; } |
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354 oop* oops_end () const { return (oop*) (header_begin() + _scopes_data_offset) ; } |
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355 |
1204 | 356 address scopes_data_begin () const { return header_begin() + _scopes_data_offset ; } |
357 address scopes_data_end () const { return header_begin() + _scopes_pcs_offset ; } | |
358 PcDesc* scopes_pcs_begin () const { return (PcDesc*)(header_begin() + _scopes_pcs_offset ); } | |
359 PcDesc* scopes_pcs_end () const { return (PcDesc*)(header_begin() + _dependencies_offset) ; } | |
360 address dependencies_begin () const { return header_begin() + _dependencies_offset ; } | |
361 address dependencies_end () const { return header_begin() + _handler_table_offset ; } | |
362 address handler_table_begin () const { return header_begin() + _handler_table_offset ; } | |
363 address handler_table_end () const { return header_begin() + _nul_chk_table_offset ; } | |
364 address nul_chk_table_begin () const { return header_begin() + _nul_chk_table_offset ; } | |
365 address nul_chk_table_end () const { return header_begin() + _nmethod_end_offset ; } | |
0 | 366 |
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367 // Sizes |
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368 int consts_size () const { return consts_end () - consts_begin (); } |
1748 | 369 int insts_size () const { return insts_end () - insts_begin (); } |
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370 int stub_size () const { return stub_end () - stub_begin (); } |
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371 int oops_size () const { return (address) oops_end () - (address) oops_begin (); } |
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372 int scopes_data_size () const { return scopes_data_end () - scopes_data_begin (); } |
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373 int scopes_pcs_size () const { return (intptr_t) scopes_pcs_end () - (intptr_t) scopes_pcs_begin (); } |
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374 int dependencies_size () const { return dependencies_end () - dependencies_begin (); } |
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375 int handler_table_size() const { return handler_table_end() - handler_table_begin(); } |
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376 int nul_chk_table_size() const { return nul_chk_table_end() - nul_chk_table_begin(); } |
0 | 377 |
378 int total_size () const; | |
379 | |
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380 // Containment |
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381 bool consts_contains (address addr) const { return consts_begin () <= addr && addr < consts_end (); } |
1748 | 382 bool insts_contains (address addr) const { return insts_begin () <= addr && addr < insts_end (); } |
0 | 383 bool stub_contains (address addr) const { return stub_begin () <= addr && addr < stub_end (); } |
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384 bool oops_contains (oop* addr) const { return oops_begin () <= addr && addr < oops_end (); } |
0 | 385 bool scopes_data_contains (address addr) const { return scopes_data_begin () <= addr && addr < scopes_data_end (); } |
386 bool scopes_pcs_contains (PcDesc* addr) const { return scopes_pcs_begin () <= addr && addr < scopes_pcs_end (); } | |
387 bool handler_table_contains(address addr) const { return handler_table_begin() <= addr && addr < handler_table_end(); } | |
388 bool nul_chk_table_contains(address addr) const { return nul_chk_table_begin() <= addr && addr < nul_chk_table_end(); } | |
389 | |
390 // entry points | |
391 address entry_point() const { return _entry_point; } // normal entry point | |
392 address verified_entry_point() const { return _verified_entry_point; } // if klass is correct | |
393 | |
394 // flag accessing and manipulation | |
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395 bool is_in_use() const { return _state == alive; } |
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396 bool is_alive() const { return _state == alive || _state == not_entrant; } |
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397 bool is_not_entrant() const { return _state == not_entrant; } |
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398 bool is_zombie() const { return _state == zombie; } |
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399 bool is_unloaded() const { return _state == unloaded; } |
0 | 400 |
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401 // Make the nmethod non entrant. The nmethod will continue to be |
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402 // alive. It is used when an uncommon trap happens. Returns true |
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403 // if this thread changed the state of the nmethod or false if |
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404 // another thread performed the transition. |
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405 bool make_not_entrant() { return make_not_entrant_or_zombie(not_entrant); } |
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406 bool make_zombie() { return make_not_entrant_or_zombie(zombie); } |
0 | 407 |
408 // used by jvmti to track if the unload event has been reported | |
409 bool unload_reported() { return _unload_reported; } | |
410 void set_unload_reported() { _unload_reported = true; } | |
411 | |
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412 bool is_marked_for_deoptimization() const { return _marked_for_deoptimization; } |
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413 void mark_for_deoptimization() { _marked_for_deoptimization = true; } |
0 | 414 |
415 void make_unloaded(BoolObjectClosure* is_alive, oop cause); | |
416 | |
417 bool has_dependencies() { return dependencies_size() != 0; } | |
418 void flush_dependencies(BoolObjectClosure* is_alive); | |
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419 bool has_flushed_dependencies() { return _has_flushed_dependencies; } |
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420 void set_has_flushed_dependencies() { |
0 | 421 assert(!has_flushed_dependencies(), "should only happen once"); |
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422 _has_flushed_dependencies = 1; |
0 | 423 } |
424 | |
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425 bool is_marked_for_reclamation() const { return _marked_for_reclamation; } |
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426 void mark_for_reclamation() { _marked_for_reclamation = 1; } |
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427 |
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428 bool has_unsafe_access() const { return _has_unsafe_access; } |
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429 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; } |
0 | 430 |
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431 bool has_method_handle_invokes() const { return _has_method_handle_invokes; } |
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432 void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; } |
0 | 433 |
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434 bool is_speculatively_disconnected() const { return _speculatively_disconnected; } |
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435 void set_speculatively_disconnected(bool z) { _speculatively_disconnected = z; } |
1202 | 436 |
0 | 437 int comp_level() const { return _comp_level; } |
438 | |
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439 // Support for oops in scopes and relocs: |
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440 // Note: index 0 is reserved for null. |
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441 oop oop_at(int index) const { return index == 0 ? (oop) NULL: *oop_addr_at(index); } |
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442 oop* oop_addr_at(int index) const { // for GC |
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443 // relocation indexes are biased by 1 (because 0 is reserved) |
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444 assert(index > 0 && index <= oops_size(), "must be a valid non-zero index"); |
1726 | 445 assert(!_oops_are_stale, "oops are stale"); |
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446 return &oops_begin()[index - 1]; |
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447 } |
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448 |
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449 void copy_oops(GrowableArray<jobject>* oops); |
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450 |
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451 // Relocation support |
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452 private: |
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453 void fix_oop_relocations(address begin, address end, bool initialize_immediates); |
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454 inline void initialize_immediate_oop(oop* dest, jobject handle); |
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455 |
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456 public: |
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457 void fix_oop_relocations(address begin, address end) { fix_oop_relocations(begin, end, false); } |
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458 void fix_oop_relocations() { fix_oop_relocations(NULL, NULL, false); } |
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459 void verify_oop_relocations(); |
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460 |
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461 bool is_at_poll_return(address pc); |
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462 bool is_at_poll_or_poll_return(address pc); |
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463 |
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464 // Scavengable oop support |
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465 bool on_scavenge_root_list() const { return (_scavenge_root_state & 1) != 0; } |
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466 protected: |
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467 enum { sl_on_list = 0x01, sl_marked = 0x10 }; |
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468 void set_on_scavenge_root_list() { _scavenge_root_state = sl_on_list; } |
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469 void clear_on_scavenge_root_list() { _scavenge_root_state = 0; } |
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470 // assertion-checking and pruning logic uses the bits of _scavenge_root_state |
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471 #ifndef PRODUCT |
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472 void set_scavenge_root_marked() { _scavenge_root_state |= sl_marked; } |
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473 void clear_scavenge_root_marked() { _scavenge_root_state &= ~sl_marked; } |
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474 bool scavenge_root_not_marked() { return (_scavenge_root_state &~ sl_on_list) == 0; } |
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475 // N.B. there is no positive marked query, and we only use the not_marked query for asserts. |
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476 #endif //PRODUCT |
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477 nmethod* scavenge_root_link() const { return _scavenge_root_link; } |
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478 void set_scavenge_root_link(nmethod *n) { _scavenge_root_link = n; } |
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479 |
1202 | 480 nmethod* saved_nmethod_link() const { return _saved_nmethod_link; } |
481 void set_saved_nmethod_link(nmethod *n) { _saved_nmethod_link = n; } | |
482 | |
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483 public: |
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484 |
0 | 485 // Sweeper support |
486 long stack_traversal_mark() { return _stack_traversal_mark; } | |
487 void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; } | |
488 | |
489 // Exception cache support | |
490 ExceptionCache* exception_cache() const { return _exception_cache; } | |
491 void set_exception_cache(ExceptionCache *ec) { _exception_cache = ec; } | |
492 address handler_for_exception_and_pc(Handle exception, address pc); | |
493 void add_handler_for_exception_and_pc(Handle exception, address pc, address handler); | |
494 void remove_from_exception_cache(ExceptionCache* ec); | |
495 | |
496 // implicit exceptions support | |
497 address continuation_for_implicit_exception(address pc); | |
498 | |
499 // On-stack replacement support | |
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500 int osr_entry_bci() const { assert(is_osr_method(), "wrong kind of nmethod"); return _entry_bci; } |
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501 address osr_entry() const { assert(is_osr_method(), "wrong kind of nmethod"); return _osr_entry_point; } |
0 | 502 void invalidate_osr_method(); |
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503 nmethod* osr_link() const { return _osr_link; } |
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504 void set_osr_link(nmethod *n) { _osr_link = n; } |
0 | 505 |
506 // tells whether frames described by this nmethod can be deoptimized | |
507 // note: native wrappers cannot be deoptimized. | |
508 bool can_be_deoptimized() const { return is_java_method(); } | |
509 | |
510 // Inline cache support | |
511 void clear_inline_caches(); | |
512 void cleanup_inline_caches(); | |
513 bool inlinecache_check_contains(address addr) const { | |
1748 | 514 return (addr >= code_begin() && addr < verified_entry_point()); |
0 | 515 } |
516 | |
517 // unlink and deallocate this nmethod | |
518 // Only NMethodSweeper class is expected to use this. NMethodSweeper is not | |
519 // expected to use any other private methods/data in this class. | |
520 | |
521 protected: | |
522 void flush(); | |
523 | |
524 public: | |
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525 // When true is returned, it is unsafe to remove this nmethod even if |
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526 // it is a zombie, since the VM or the ServiceThread might still be |
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527 // using it. |
0 | 528 bool is_locked_by_vm() const { return _lock_count >0; } |
529 | |
530 // See comment at definition of _last_seen_on_stack | |
531 void mark_as_seen_on_stack(); | |
532 bool can_not_entrant_be_converted(); | |
533 | |
534 // Evolution support. We make old (discarded) compiled methods point to new methodOops. | |
535 void set_method(methodOop method) { _method = method; } | |
536 | |
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537 |
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538 oop graal_compiled_method() { return _graal_compiled_method; } |
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539 void set_graal_compiled_method(oop compiled_method) { _graal_compiled_method = compiled_method; } |
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540 |
0 | 541 // GC support |
542 void do_unloading(BoolObjectClosure* is_alive, OopClosure* keep_alive, | |
543 bool unloading_occurred); | |
544 bool can_unload(BoolObjectClosure* is_alive, OopClosure* keep_alive, | |
545 oop* root, bool unloading_occurred); | |
546 | |
547 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, | |
548 OopClosure* f); | |
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549 void oops_do(OopClosure* f) { oops_do(f, false); } |
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550 void oops_do(OopClosure* f, bool do_strong_roots_only); |
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551 bool detect_scavenge_root_oops(); |
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552 void verify_scavenge_root_oops() PRODUCT_RETURN; |
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553 |
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554 bool test_set_oops_do_mark(); |
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555 static void oops_do_marking_prologue(); |
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556 static void oops_do_marking_epilogue(); |
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557 static bool oops_do_marking_is_active() { return _oops_do_mark_nmethods != NULL; } |
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558 DEBUG_ONLY(bool test_oops_do_mark() { return _oops_do_mark_link != NULL; }) |
0 | 559 |
560 // ScopeDesc for an instruction | |
561 ScopeDesc* scope_desc_at(address pc); | |
562 | |
563 private: | |
564 ScopeDesc* scope_desc_in(address begin, address end); | |
565 | |
1204 | 566 address* orig_pc_addr(const frame* fr) { return (address*) ((address)fr->unextended_sp() + _orig_pc_offset); } |
0 | 567 |
568 PcDesc* find_pc_desc_internal(address pc, bool approximate); | |
569 | |
570 PcDesc* find_pc_desc(address pc, bool approximate) { | |
571 PcDesc* desc = _pc_desc_cache.last_pc_desc(); | |
1748 | 572 if (desc != NULL && desc->pc_offset() == pc - code_begin()) { |
0 | 573 return desc; |
574 } | |
575 return find_pc_desc_internal(pc, approximate); | |
576 } | |
577 | |
578 public: | |
579 // ScopeDesc retrieval operation | |
580 PcDesc* pc_desc_at(address pc) { return find_pc_desc(pc, false); } | |
581 // pc_desc_near returns the first PcDesc at or after the givne pc. | |
582 PcDesc* pc_desc_near(address pc) { return find_pc_desc(pc, true); } | |
583 | |
584 public: | |
585 // copying of debugging information | |
586 void copy_scopes_pcs(PcDesc* pcs, int count); | |
587 void copy_scopes_data(address buffer, int size); | |
588 | |
1204 | 589 // Deopt |
590 // Return true is the PC is one would expect if the frame is being deopted. | |
591 bool is_deopt_pc (address pc) { return is_deopt_entry(pc) || is_deopt_mh_entry(pc); } | |
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592 |
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593 // (tw) When using graal, the address might be off by 5 (because this is the size of the call instruction. |
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594 // (tw) TODO: Replace this by a more general mechanism. |
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595 bool is_deopt_entry (address pc) { return pc == deopt_handler_begin() || (UseGraal && pc == deopt_handler_begin() + 5); } |
1204 | 596 bool is_deopt_mh_entry(address pc) { return pc == deopt_mh_handler_begin(); } |
0 | 597 // Accessor/mutator for the original pc of a frame before a frame was deopted. |
598 address get_original_pc(const frame* fr) { return *orig_pc_addr(fr); } | |
599 void set_original_pc(const frame* fr, address pc) { *orig_pc_addr(fr) = pc; } | |
600 | |
1204 | 601 static address get_deopt_original_pc(const frame* fr); |
602 | |
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603 // MethodHandle |
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604 bool is_method_handle_return(address return_pc); |
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605 |
0 | 606 // jvmti support: |
607 void post_compiled_method_load_event(); | |
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608 jmethodID get_and_cache_jmethod_id(); |
0 | 609 |
610 // verify operations | |
611 void verify(); | |
612 void verify_scopes(); | |
613 void verify_interrupt_point(address interrupt_point); | |
614 | |
615 // printing support | |
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616 void print() const; |
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617 void print_code(); |
0 | 618 void print_relocations() PRODUCT_RETURN; |
619 void print_pcs() PRODUCT_RETURN; | |
620 void print_scopes() PRODUCT_RETURN; | |
621 void print_dependencies() PRODUCT_RETURN; | |
622 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
623 void print_calls(outputStream* st) PRODUCT_RETURN; | |
624 void print_handler_table() PRODUCT_RETURN; | |
625 void print_nul_chk_table() PRODUCT_RETURN; | |
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626 void print_nmethod(bool print_code); |
0 | 627 |
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628 // need to re-define this from CodeBlob else the overload hides it |
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629 virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); } |
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630 void print_on(outputStream* st, const char* msg) const; |
0 | 631 |
632 // Logging | |
633 void log_identity(xmlStream* log) const; | |
634 void log_new_nmethod() const; | |
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635 void log_state_change() const; |
0 | 636 |
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637 // Prints block-level comments, including nmethod specific block labels: |
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638 virtual void print_block_comment(outputStream* stream, address block_begin) { |
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639 print_nmethod_labels(stream, block_begin); |
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640 CodeBlob::print_block_comment(stream, block_begin); |
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641 } |
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642 void print_nmethod_labels(outputStream* stream, address block_begin); |
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643 |
0 | 644 // Prints a comment for one native instruction (reloc info, pc desc) |
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645 void print_code_comment_on(outputStream* st, int column, address begin, address end); |
0 | 646 static void print_statistics() PRODUCT_RETURN; |
647 | |
648 // Compiler task identification. Note that all OSR methods | |
649 // are numbered in an independent sequence if CICountOSR is true, | |
650 // and native method wrappers are also numbered independently if | |
651 // CICountNative is true. | |
652 int compile_id() const { return _compile_id; } | |
653 const char* compile_kind() const; | |
654 | |
655 // For debugging | |
656 // CompiledIC* IC_at(char* p) const; | |
657 // PrimitiveIC* primitiveIC_at(char* p) const; | |
658 oop embeddedOop_at(address p); | |
659 | |
660 // tells if any of this method's dependencies have been invalidated | |
661 // (this is expensive!) | |
662 bool check_all_dependencies(); | |
663 | |
664 // tells if this compiled method is dependent on the given changes, | |
665 // and the changes have invalidated it | |
666 bool check_dependency_on(DepChange& changes); | |
667 | |
668 // Evolution support. Tells if this compiled method is dependent on any of | |
669 // methods m() of class dependee, such that if m() in dependee is replaced, | |
670 // this compiled method will have to be deoptimized. | |
671 bool is_evol_dependent_on(klassOop dependee); | |
672 | |
673 // Fast breakpoint support. Tells if this compiled method is | |
674 // dependent on the given method. Returns true if this nmethod | |
675 // corresponds to the given method as well. | |
676 bool is_dependent_on_method(methodOop dependee); | |
677 | |
678 // is it ok to patch at address? | |
679 bool is_patchable_at(address instr_address); | |
680 | |
681 // UseBiasedLocking support | |
2019 | 682 ByteSize native_receiver_sp_offset() { |
683 return _native_receiver_sp_offset; | |
0 | 684 } |
2019 | 685 ByteSize native_basic_lock_sp_offset() { |
686 return _native_basic_lock_sp_offset; | |
0 | 687 } |
688 | |
689 // support for code generation | |
690 static int verified_entry_point_offset() { return offset_of(nmethod, _verified_entry_point); } | |
691 static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); } | |
692 static int entry_bci_offset() { return offset_of(nmethod, _entry_bci); } | |
693 | |
694 }; | |
695 | |
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696 // Locks an nmethod so its code will not get removed and it will not |
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697 // be made into a zombie, even if it is a not_entrant method. After the |
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698 // nmethod becomes a zombie, if CompiledMethodUnload event processing |
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699 // needs to be done, then lock_nmethod() is used directly to keep the |
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700 // generated code from being reused too early. |
0 | 701 class nmethodLocker : public StackObj { |
702 nmethod* _nm; | |
703 | |
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704 public: |
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705 |
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706 // note: nm can be NULL |
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707 // Only JvmtiDeferredEvent::compiled_method_unload_event() |
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708 // should pass zombie_ok == true. |
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709 static void lock_nmethod(nmethod* nm, bool zombie_ok = false); |
0 | 710 static void unlock_nmethod(nmethod* nm); // (ditto) |
711 | |
712 nmethodLocker(address pc); // derive nm from pc | |
713 nmethodLocker(nmethod *nm) { _nm = nm; lock_nmethod(_nm); } | |
714 nmethodLocker() { _nm = NULL; } | |
715 ~nmethodLocker() { unlock_nmethod(_nm); } | |
716 | |
717 nmethod* code() { return _nm; } | |
718 void set_code(nmethod* new_nm) { | |
719 unlock_nmethod(_nm); // note: This works even if _nm==new_nm. | |
720 _nm = new_nm; | |
721 lock_nmethod(_nm); | |
722 } | |
723 }; | |
1972 | 724 |
725 #endif // SHARE_VM_CODE_NMETHOD_HPP |