Mercurial > hg > graal-jvmci-8
annotate src/share/vm/code/nmethod.hpp @ 1602:136b78722a08
6939203: JSR 292 needs method handle constants
Summary: Add new CP types CONSTANT_MethodHandle, CONSTANT_MethodType; extend 'ldc' bytecode.
Reviewed-by: twisti, never
author | jrose |
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date | Wed, 09 Jun 2010 18:50:45 -0700 |
parents | e9ff18c4ace7 |
children | 38e8278318ca |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 // This class is used internally by nmethods, to cache | |
26 // exception/pc/handler information. | |
27 | |
28 class ExceptionCache : public CHeapObj { | |
29 friend class VMStructs; | |
30 private: | |
31 static address _unwind_handler; | |
32 enum { cache_size = 16 }; | |
33 klassOop _exception_type; | |
34 address _pc[cache_size]; | |
35 address _handler[cache_size]; | |
36 int _count; | |
37 ExceptionCache* _next; | |
38 | |
39 address pc_at(int index) { assert(index >= 0 && index < count(),""); return _pc[index]; } | |
40 void set_pc_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _pc[index] = a; } | |
41 address handler_at(int index) { assert(index >= 0 && index < count(),""); return _handler[index]; } | |
42 void set_handler_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _handler[index] = a; } | |
43 int count() { return _count; } | |
44 void increment_count() { _count++; } | |
45 | |
46 public: | |
47 | |
48 ExceptionCache(Handle exception, address pc, address handler); | |
49 | |
50 klassOop exception_type() { return _exception_type; } | |
51 klassOop* exception_type_addr() { return &_exception_type; } | |
52 ExceptionCache* next() { return _next; } | |
53 void set_next(ExceptionCache *ec) { _next = ec; } | |
54 | |
55 address match(Handle exception, address pc); | |
56 bool match_exception_with_space(Handle exception) ; | |
57 address test_address(address addr); | |
58 bool add_address_and_handler(address addr, address handler) ; | |
59 | |
60 static address unwind_handler() { return _unwind_handler; } | |
61 }; | |
62 | |
63 | |
64 // cache pc descs found in earlier inquiries | |
65 class PcDescCache VALUE_OBJ_CLASS_SPEC { | |
66 friend class VMStructs; | |
67 private: | |
68 enum { cache_size = 4 }; | |
69 PcDesc* _last_pc_desc; // most recent pc_desc found | |
70 PcDesc* _pc_descs[cache_size]; // last cache_size pc_descs found | |
71 public: | |
72 PcDescCache() { debug_only(_last_pc_desc = NULL); } | |
73 void reset_to(PcDesc* initial_pc_desc); | |
74 PcDesc* find_pc_desc(int pc_offset, bool approximate); | |
75 void add_pc_desc(PcDesc* pc_desc); | |
76 PcDesc* last_pc_desc() { return _last_pc_desc; } | |
77 }; | |
78 | |
79 | |
80 // nmethods (native methods) are the compiled code versions of Java methods. | |
81 | |
82 struct nmFlags { | |
83 friend class VMStructs; | |
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84 unsigned int version:8; // version number (0 = first version) |
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85 unsigned int age:4; // age (in # of sweep steps) |
0 | 86 |
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87 unsigned int state:2; // {alive, zombie, unloaded) |
0 | 88 |
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89 unsigned int isUncommonRecompiled:1; // recompiled because of uncommon trap? |
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90 unsigned int isToBeRecompiled:1; // to be recompiled as soon as it matures |
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91 unsigned int hasFlushedDependencies:1; // Used for maintenance of dependencies |
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92 unsigned int markedForReclamation:1; // Used by NMethodSweeper |
0 | 93 |
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94 unsigned int has_unsafe_access:1; // May fault due to unsafe access. |
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95 unsigned int has_method_handle_invokes:1; // Has this method MethodHandle invokes? |
0 | 96 |
1202 | 97 unsigned int speculatively_disconnected:1; // Marked for potential unload |
98 | |
0 | 99 void clear(); |
100 }; | |
101 | |
102 | |
103 // A nmethod contains: | |
104 // - header (the nmethod structure) | |
105 // [Relocation] | |
106 // - relocation information | |
107 // - constant part (doubles, longs and floats used in nmethod) | |
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108 // - oop table |
0 | 109 // [Code] |
110 // - code body | |
111 // - exception handler | |
112 // - stub code | |
113 // [Debugging information] | |
114 // - oop array | |
115 // - data array | |
116 // - pcs | |
117 // [Exception handler table] | |
118 // - handler entry point array | |
119 // [Implicit Null Pointer exception table] | |
120 // - implicit null table array | |
121 | |
122 class Dependencies; | |
123 class ExceptionHandlerTable; | |
124 class ImplicitExceptionTable; | |
125 class AbstractCompiler; | |
126 class xmlStream; | |
127 | |
128 class nmethod : public CodeBlob { | |
129 friend class VMStructs; | |
130 friend class NMethodSweeper; | |
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131 friend class CodeCache; // non-perm oops |
0 | 132 private: |
133 // Shared fields for all nmethod's | |
134 static int _zombie_instruction_size; | |
135 | |
136 methodOop _method; | |
137 int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method | |
138 | |
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139 // To support simple linked-list chaining of nmethods: |
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140 nmethod* _osr_link; // from instanceKlass::osr_nmethods_head |
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141 nmethod* _scavenge_root_link; // from CodeCache::scavenge_root_nmethods |
1202 | 142 nmethod* _saved_nmethod_link; // from CodeCache::speculatively_disconnect |
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143 |
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144 static nmethod* volatile _oops_do_mark_nmethods; |
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145 nmethod* volatile _oops_do_mark_link; |
0 | 146 |
147 AbstractCompiler* _compiler; // The compiler which compiled this nmethod | |
148 | |
149 // Offsets for different nmethod parts | |
150 int _exception_offset; | |
1204 | 151 // All deoptee's will resume execution at this location described by |
152 // this offset. | |
0 | 153 int _deoptimize_offset; |
1204 | 154 // All deoptee's at a MethodHandle call site will resume execution |
155 // at this location described by this offset. | |
156 int _deoptimize_mh_offset; | |
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157 // Offset of the unwind handler if it exists |
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158 int _unwind_handler_offset; |
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159 |
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160 #ifdef HAVE_DTRACE_H |
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161 int _trap_offset; |
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162 #endif // def HAVE_DTRACE_H |
0 | 163 int _stub_offset; |
164 int _consts_offset; | |
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165 int _oops_offset; // offset to where embedded oop table begins (inside data) |
0 | 166 int _scopes_data_offset; |
167 int _scopes_pcs_offset; | |
168 int _dependencies_offset; | |
169 int _handler_table_offset; | |
170 int _nul_chk_table_offset; | |
171 int _nmethod_end_offset; | |
172 | |
173 // location in frame (offset for sp) that deopt can store the original | |
174 // pc during a deopt. | |
175 int _orig_pc_offset; | |
176 | |
177 int _compile_id; // which compilation made this nmethod | |
178 int _comp_level; // compilation level | |
179 | |
180 // offsets for entry points | |
181 address _entry_point; // entry point with class check | |
182 address _verified_entry_point; // entry point without class check | |
183 address _osr_entry_point; // entry point for on stack replacement | |
184 | |
185 nmFlags flags; // various flags to keep track of nmethod state | |
186 bool _markedForDeoptimization; // Used for stack deoptimization | |
187 enum { alive = 0, | |
605 | 188 not_entrant = 1, // uncommon trap has happened but activations may still exist |
0 | 189 zombie = 2, |
190 unloaded = 3 }; | |
191 | |
192 // used by jvmti to track if an unload event has been posted for this nmethod. | |
193 bool _unload_reported; | |
194 | |
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195 jbyte _scavenge_root_state; |
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196 |
0 | 197 NOT_PRODUCT(bool _has_debug_info; ) |
198 | |
199 // Nmethod Flushing lock (if non-zero, then the nmethod is not removed) | |
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 | |
212 // These are only used for compiled synchronized native methods to | |
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. | |
222 ByteSize _compiled_synchronized_native_basic_lock_owner_sp_offset; | |
223 ByteSize _compiled_synchronized_native_basic_lock_sp_offset; | |
224 | |
225 friend class nmethodLocker; | |
226 | |
227 // For native wrappers | |
228 nmethod(methodOop method, | |
229 int nmethod_size, | |
230 CodeOffsets* offsets, | |
231 CodeBuffer *code_buffer, | |
232 int frame_size, | |
233 ByteSize basic_lock_owner_sp_offset, /* synchronized natives only */ | |
234 ByteSize basic_lock_sp_offset, /* synchronized natives only */ | |
235 OopMapSet* oop_maps); | |
236 | |
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237 #ifdef HAVE_DTRACE_H |
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238 // For native wrappers |
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239 nmethod(methodOop method, |
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240 int nmethod_size, |
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241 CodeOffsets* offsets, |
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242 CodeBuffer *code_buffer, |
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243 int frame_size); |
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244 #endif // def HAVE_DTRACE_H |
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245 |
0 | 246 // Creation support |
247 nmethod(methodOop method, | |
248 int nmethod_size, | |
249 int compile_id, | |
250 int entry_bci, | |
251 CodeOffsets* offsets, | |
252 int orig_pc_offset, | |
253 DebugInformationRecorder *recorder, | |
254 Dependencies* dependencies, | |
255 CodeBuffer *code_buffer, | |
256 int frame_size, | |
257 OopMapSet* oop_maps, | |
258 ExceptionHandlerTable* handler_table, | |
259 ImplicitExceptionTable* nul_chk_table, | |
260 AbstractCompiler* compiler, | |
261 int comp_level); | |
262 | |
263 // helper methods | |
264 void* operator new(size_t size, int nmethod_size); | |
265 | |
266 const char* reloc_string_for(u_char* begin, u_char* end); | |
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267 // Returns true if this thread changed the state of the nmethod or |
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268 // false if another thread performed the transition. |
1141 | 269 bool make_not_entrant_or_zombie(unsigned int state); |
0 | 270 void inc_decompile_count(); |
271 | |
272 // used to check that writes to nmFlags are done consistently. | |
273 static void check_safepoint() PRODUCT_RETURN; | |
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 | |
280 inline void post_compiled_method_unload(); | |
281 | |
282 public: | |
283 // create nmethod with entry_bci | |
284 static nmethod* new_nmethod(methodHandle method, | |
285 int compile_id, | |
286 int entry_bci, | |
287 CodeOffsets* offsets, | |
288 int orig_pc_offset, | |
289 DebugInformationRecorder* recorder, | |
290 Dependencies* dependencies, | |
291 CodeBuffer *code_buffer, | |
292 int frame_size, | |
293 OopMapSet* oop_maps, | |
294 ExceptionHandlerTable* handler_table, | |
295 ImplicitExceptionTable* nul_chk_table, | |
296 AbstractCompiler* compiler, | |
297 int comp_level); | |
298 | |
299 static nmethod* new_native_nmethod(methodHandle method, | |
300 CodeBuffer *code_buffer, | |
301 int vep_offset, | |
302 int frame_complete, | |
303 int frame_size, | |
304 ByteSize receiver_sp_offset, | |
305 ByteSize basic_lock_sp_offset, | |
306 OopMapSet* oop_maps); | |
307 | |
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308 #ifdef HAVE_DTRACE_H |
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309 // The method we generate for a dtrace probe has to look |
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310 // like an nmethod as far as the rest of the system is concerned |
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311 // which is somewhat unfortunate. |
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312 static nmethod* new_dtrace_nmethod(methodHandle method, |
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313 CodeBuffer *code_buffer, |
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314 int vep_offset, |
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315 int trap_offset, |
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316 int frame_complete, |
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317 int frame_size); |
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318 |
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319 int trap_offset() const { return _trap_offset; } |
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320 address trap_address() const { return code_begin() + _trap_offset; } |
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321 |
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322 #endif // def HAVE_DTRACE_H |
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323 |
0 | 324 // accessors |
325 methodOop method() const { return _method; } | |
326 AbstractCompiler* compiler() const { return _compiler; } | |
327 | |
328 #ifndef PRODUCT | |
329 bool has_debug_info() const { return _has_debug_info; } | |
330 void set_has_debug_info(bool f) { _has_debug_info = false; } | |
331 #endif // NOT PRODUCT | |
332 | |
333 // type info | |
334 bool is_nmethod() const { return true; } | |
335 bool is_java_method() const { return !method()->is_native(); } | |
336 bool is_native_method() const { return method()->is_native(); } | |
337 bool is_osr_method() const { return _entry_bci != InvocationEntryBci; } | |
338 | |
339 bool is_compiled_by_c1() const; | |
340 bool is_compiled_by_c2() const; | |
341 | |
342 // boundaries for different parts | |
1204 | 343 address code_begin () const { return _entry_point; } |
344 address code_end () const { return header_begin() + _stub_offset ; } | |
345 address exception_begin () const { return header_begin() + _exception_offset ; } | |
346 address deopt_handler_begin () const { return header_begin() + _deoptimize_offset ; } | |
347 address deopt_mh_handler_begin() const { return header_begin() + _deoptimize_mh_offset ; } | |
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348 address unwind_handler_begin () const { return _unwind_handler_offset != -1 ? (header_begin() + _unwind_handler_offset) : NULL; } |
1204 | 349 address stub_begin () const { return header_begin() + _stub_offset ; } |
350 address stub_end () const { return header_begin() + _consts_offset ; } | |
351 address consts_begin () const { return header_begin() + _consts_offset ; } | |
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352 address consts_end () const { return header_begin() + _oops_offset ; } |
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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 code_size () const { return code_end () - code_begin (); } |
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369 int stub_size () const { return stub_end () - stub_begin (); } |
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370 int consts_size () const { return consts_end () - consts_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 |
0 | 381 bool code_contains (address addr) const { return code_begin () <= addr && addr < code_end (); } |
382 bool stub_contains (address addr) const { return stub_begin () <= addr && addr < stub_end (); } | |
383 bool consts_contains (address addr) const { return consts_begin () <= addr && addr < consts_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 | |
395 bool is_in_use() const { return flags.state == alive; } | |
396 bool is_alive() const { return flags.state == alive || flags.state == not_entrant; } | |
397 bool is_not_entrant() const { return flags.state == not_entrant; } | |
398 bool is_zombie() const { return flags.state == zombie; } | |
399 bool is_unloaded() const { return flags.state == unloaded; } | |
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 | |
412 bool is_marked_for_deoptimization() const { return _markedForDeoptimization; } | |
413 void mark_for_deoptimization() { _markedForDeoptimization = true; } | |
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); | |
419 bool has_flushed_dependencies() { return flags.hasFlushedDependencies; } | |
420 void set_has_flushed_dependencies() { | |
421 assert(!has_flushed_dependencies(), "should only happen once"); | |
422 flags.hasFlushedDependencies = 1; | |
423 } | |
424 | |
425 bool is_marked_for_reclamation() const { return flags.markedForReclamation; } | |
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426 void mark_for_reclamation() { flags.markedForReclamation = 1; } |
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427 void unmark_for_reclamation() { flags.markedForReclamation = 0; } |
0 | 428 |
429 bool has_unsafe_access() const { return flags.has_unsafe_access; } | |
430 void set_has_unsafe_access(bool z) { flags.has_unsafe_access = z; } | |
431 | |
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432 bool has_method_handle_invokes() const { return flags.has_method_handle_invokes; } |
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433 void set_has_method_handle_invokes(bool z) { flags.has_method_handle_invokes = z; } |
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434 |
1202 | 435 bool is_speculatively_disconnected() const { return flags.speculatively_disconnected; } |
436 void set_speculatively_disconnected(bool z) { flags.speculatively_disconnected = z; } | |
437 | |
0 | 438 int comp_level() const { return _comp_level; } |
439 | |
440 int version() const { return flags.version; } | |
441 void set_version(int v); | |
442 | |
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443 // Support for oops in scopes and relocs: |
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444 // Note: index 0 is reserved for null. |
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445 oop oop_at(int index) const { return index == 0 ? (oop) NULL: *oop_addr_at(index); } |
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446 oop* oop_addr_at(int index) const { // for GC |
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447 // relocation indexes are biased by 1 (because 0 is reserved) |
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448 assert(index > 0 && index <= oops_size(), "must be a valid non-zero index"); |
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449 return &oops_begin()[index - 1]; |
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450 } |
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451 |
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452 void copy_oops(GrowableArray<jobject>* oops); |
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453 |
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454 // Relocation support |
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455 private: |
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456 void fix_oop_relocations(address begin, address end, bool initialize_immediates); |
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457 inline void initialize_immediate_oop(oop* dest, jobject handle); |
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458 |
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459 public: |
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460 void fix_oop_relocations(address begin, address end) { fix_oop_relocations(begin, end, false); } |
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461 void fix_oop_relocations() { fix_oop_relocations(NULL, NULL, false); } |
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462 |
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463 bool is_at_poll_return(address pc); |
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464 bool is_at_poll_or_poll_return(address pc); |
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465 |
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466 // Non-perm oop support |
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467 bool on_scavenge_root_list() const { return (_scavenge_root_state & 1) != 0; } |
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468 protected: |
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469 enum { npl_on_list = 0x01, npl_marked = 0x10 }; |
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470 void set_on_scavenge_root_list() { _scavenge_root_state = npl_on_list; } |
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471 void clear_on_scavenge_root_list() { _scavenge_root_state = 0; } |
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472 // assertion-checking and pruning logic uses the bits of _scavenge_root_state |
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473 #ifndef PRODUCT |
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474 void set_scavenge_root_marked() { _scavenge_root_state |= npl_marked; } |
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475 void clear_scavenge_root_marked() { _scavenge_root_state &= ~npl_marked; } |
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476 bool scavenge_root_not_marked() { return (_scavenge_root_state &~ npl_on_list) == 0; } |
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477 // N.B. there is no positive marked query, and we only use the not_marked query for asserts. |
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478 #endif //PRODUCT |
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479 nmethod* scavenge_root_link() const { return _scavenge_root_link; } |
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480 void set_scavenge_root_link(nmethod *n) { _scavenge_root_link = n; } |
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481 |
1202 | 482 nmethod* saved_nmethod_link() const { return _saved_nmethod_link; } |
483 void set_saved_nmethod_link(nmethod *n) { _saved_nmethod_link = n; } | |
484 | |
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485 public: |
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486 |
0 | 487 // Sweeper support |
488 long stack_traversal_mark() { return _stack_traversal_mark; } | |
489 void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; } | |
490 | |
491 // Exception cache support | |
492 ExceptionCache* exception_cache() const { return _exception_cache; } | |
493 void set_exception_cache(ExceptionCache *ec) { _exception_cache = ec; } | |
494 address handler_for_exception_and_pc(Handle exception, address pc); | |
495 void add_handler_for_exception_and_pc(Handle exception, address pc, address handler); | |
496 void remove_from_exception_cache(ExceptionCache* ec); | |
497 | |
498 // implicit exceptions support | |
499 address continuation_for_implicit_exception(address pc); | |
500 | |
501 // On-stack replacement support | |
502 int osr_entry_bci() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _entry_bci; } | |
503 address osr_entry() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _osr_entry_point; } | |
504 void invalidate_osr_method(); | |
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505 nmethod* osr_link() const { return _osr_link; } |
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506 void set_osr_link(nmethod *n) { _osr_link = n; } |
0 | 507 |
508 // tells whether frames described by this nmethod can be deoptimized | |
509 // note: native wrappers cannot be deoptimized. | |
510 bool can_be_deoptimized() const { return is_java_method(); } | |
511 | |
512 // Inline cache support | |
513 void clear_inline_caches(); | |
514 void cleanup_inline_caches(); | |
515 bool inlinecache_check_contains(address addr) const { | |
516 return (addr >= instructions_begin() && addr < verified_entry_point()); | |
517 } | |
518 | |
519 // unlink and deallocate this nmethod | |
520 // Only NMethodSweeper class is expected to use this. NMethodSweeper is not | |
521 // expected to use any other private methods/data in this class. | |
522 | |
523 protected: | |
524 void flush(); | |
525 | |
526 public: | |
527 // If returning true, it is unsafe to remove this nmethod even though it is a zombie | |
528 // nmethod, since the VM might have a reference to it. Should only be called from a safepoint. | |
529 bool is_locked_by_vm() const { return _lock_count >0; } | |
530 | |
531 // See comment at definition of _last_seen_on_stack | |
532 void mark_as_seen_on_stack(); | |
533 bool can_not_entrant_be_converted(); | |
534 | |
535 // Evolution support. We make old (discarded) compiled methods point to new methodOops. | |
536 void set_method(methodOop method) { _method = method; } | |
537 | |
538 // GC support | |
539 void do_unloading(BoolObjectClosure* is_alive, OopClosure* keep_alive, | |
540 bool unloading_occurred); | |
541 bool can_unload(BoolObjectClosure* is_alive, OopClosure* keep_alive, | |
542 oop* root, bool unloading_occurred); | |
543 | |
544 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, | |
545 OopClosure* f); | |
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546 void oops_do(OopClosure* f) { oops_do(f, false); } |
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547 void oops_do(OopClosure* f, bool do_strong_roots_only); |
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548 bool detect_scavenge_root_oops(); |
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549 void verify_scavenge_root_oops() PRODUCT_RETURN; |
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550 |
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551 bool test_set_oops_do_mark(); |
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552 static void oops_do_marking_prologue(); |
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553 static void oops_do_marking_epilogue(); |
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554 static bool oops_do_marking_is_active() { return _oops_do_mark_nmethods != NULL; } |
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555 DEBUG_ONLY(bool test_oops_do_mark() { return _oops_do_mark_link != NULL; }) |
0 | 556 |
557 // ScopeDesc for an instruction | |
558 ScopeDesc* scope_desc_at(address pc); | |
559 | |
560 private: | |
561 ScopeDesc* scope_desc_in(address begin, address end); | |
562 | |
1204 | 563 address* orig_pc_addr(const frame* fr) { return (address*) ((address)fr->unextended_sp() + _orig_pc_offset); } |
0 | 564 |
565 PcDesc* find_pc_desc_internal(address pc, bool approximate); | |
566 | |
567 PcDesc* find_pc_desc(address pc, bool approximate) { | |
568 PcDesc* desc = _pc_desc_cache.last_pc_desc(); | |
569 if (desc != NULL && desc->pc_offset() == pc - instructions_begin()) { | |
570 return desc; | |
571 } | |
572 return find_pc_desc_internal(pc, approximate); | |
573 } | |
574 | |
575 public: | |
576 // ScopeDesc retrieval operation | |
577 PcDesc* pc_desc_at(address pc) { return find_pc_desc(pc, false); } | |
578 // pc_desc_near returns the first PcDesc at or after the givne pc. | |
579 PcDesc* pc_desc_near(address pc) { return find_pc_desc(pc, true); } | |
580 | |
581 public: | |
582 // copying of debugging information | |
583 void copy_scopes_pcs(PcDesc* pcs, int count); | |
584 void copy_scopes_data(address buffer, int size); | |
585 | |
1204 | 586 // Deopt |
587 // Return true is the PC is one would expect if the frame is being deopted. | |
588 bool is_deopt_pc (address pc) { return is_deopt_entry(pc) || is_deopt_mh_entry(pc); } | |
589 bool is_deopt_entry (address pc) { return pc == deopt_handler_begin(); } | |
590 bool is_deopt_mh_entry(address pc) { return pc == deopt_mh_handler_begin(); } | |
0 | 591 // Accessor/mutator for the original pc of a frame before a frame was deopted. |
592 address get_original_pc(const frame* fr) { return *orig_pc_addr(fr); } | |
593 void set_original_pc(const frame* fr, address pc) { *orig_pc_addr(fr) = pc; } | |
594 | |
1204 | 595 static address get_deopt_original_pc(const frame* fr); |
596 | |
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597 // MethodHandle |
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598 bool is_method_handle_return(address return_pc); |
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599 |
0 | 600 // jvmti support: |
601 void post_compiled_method_load_event(); | |
602 | |
603 // verify operations | |
604 void verify(); | |
605 void verify_scopes(); | |
606 void verify_interrupt_point(address interrupt_point); | |
607 | |
608 // printing support | |
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609 void print() const; |
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610 void print_code(); |
0 | 611 void print_relocations() PRODUCT_RETURN; |
612 void print_pcs() PRODUCT_RETURN; | |
613 void print_scopes() PRODUCT_RETURN; | |
614 void print_dependencies() PRODUCT_RETURN; | |
615 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
616 void print_calls(outputStream* st) PRODUCT_RETURN; | |
617 void print_handler_table() PRODUCT_RETURN; | |
618 void print_nul_chk_table() PRODUCT_RETURN; | |
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619 void print_nmethod(bool print_code); |
0 | 620 |
621 void print_on(outputStream* st, const char* title) const; | |
622 | |
623 // Logging | |
624 void log_identity(xmlStream* log) const; | |
625 void log_new_nmethod() const; | |
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626 void log_state_change() const; |
0 | 627 |
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628 // Prints block-level comments, including nmethod specific block labels: |
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629 virtual void print_block_comment(outputStream* stream, address block_begin) { |
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630 print_nmethod_labels(stream, block_begin); |
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631 CodeBlob::print_block_comment(stream, block_begin); |
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632 } |
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633 void print_nmethod_labels(outputStream* stream, address block_begin); |
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634 |
0 | 635 // Prints a comment for one native instruction (reloc info, pc desc) |
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636 void print_code_comment_on(outputStream* st, int column, address begin, address end); |
0 | 637 static void print_statistics() PRODUCT_RETURN; |
638 | |
639 // Compiler task identification. Note that all OSR methods | |
640 // are numbered in an independent sequence if CICountOSR is true, | |
641 // and native method wrappers are also numbered independently if | |
642 // CICountNative is true. | |
643 int compile_id() const { return _compile_id; } | |
644 const char* compile_kind() const; | |
645 | |
646 // For debugging | |
647 // CompiledIC* IC_at(char* p) const; | |
648 // PrimitiveIC* primitiveIC_at(char* p) const; | |
649 oop embeddedOop_at(address p); | |
650 | |
651 // tells if any of this method's dependencies have been invalidated | |
652 // (this is expensive!) | |
653 bool check_all_dependencies(); | |
654 | |
655 // tells if this compiled method is dependent on the given changes, | |
656 // and the changes have invalidated it | |
657 bool check_dependency_on(DepChange& changes); | |
658 | |
659 // Evolution support. Tells if this compiled method is dependent on any of | |
660 // methods m() of class dependee, such that if m() in dependee is replaced, | |
661 // this compiled method will have to be deoptimized. | |
662 bool is_evol_dependent_on(klassOop dependee); | |
663 | |
664 // Fast breakpoint support. Tells if this compiled method is | |
665 // dependent on the given method. Returns true if this nmethod | |
666 // corresponds to the given method as well. | |
667 bool is_dependent_on_method(methodOop dependee); | |
668 | |
669 // is it ok to patch at address? | |
670 bool is_patchable_at(address instr_address); | |
671 | |
672 // UseBiasedLocking support | |
673 ByteSize compiled_synchronized_native_basic_lock_owner_sp_offset() { | |
674 return _compiled_synchronized_native_basic_lock_owner_sp_offset; | |
675 } | |
676 ByteSize compiled_synchronized_native_basic_lock_sp_offset() { | |
677 return _compiled_synchronized_native_basic_lock_sp_offset; | |
678 } | |
679 | |
680 // support for code generation | |
681 static int verified_entry_point_offset() { return offset_of(nmethod, _verified_entry_point); } | |
682 static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); } | |
683 static int entry_bci_offset() { return offset_of(nmethod, _entry_bci); } | |
684 | |
685 }; | |
686 | |
687 // Locks an nmethod so its code will not get removed, even if it is a zombie/not_entrant method | |
688 class nmethodLocker : public StackObj { | |
689 nmethod* _nm; | |
690 | |
691 static void lock_nmethod(nmethod* nm); // note: nm can be NULL | |
692 static void unlock_nmethod(nmethod* nm); // (ditto) | |
693 | |
694 public: | |
695 nmethodLocker(address pc); // derive nm from pc | |
696 nmethodLocker(nmethod *nm) { _nm = nm; lock_nmethod(_nm); } | |
697 nmethodLocker() { _nm = NULL; } | |
698 ~nmethodLocker() { unlock_nmethod(_nm); } | |
699 | |
700 nmethod* code() { return _nm; } | |
701 void set_code(nmethod* new_nm) { | |
702 unlock_nmethod(_nm); // note: This works even if _nm==new_nm. | |
703 _nm = new_nm; | |
704 lock_nmethod(_nm); | |
705 } | |
706 }; |