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--- old/src/share/vm/code/nmethod.hpp
+++ new/src/share/vm/code/nmethod.hpp
1 1 /*
2 2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 21 * have any questions.
22 22 *
23 23 */
24 24
25 25 // This class is used internally by nmethods, to cache
26 26 // exception/pc/handler information.
27 27
28 28 class ExceptionCache : public CHeapObj {
29 29 friend class VMStructs;
30 30 private:
31 31 static address _unwind_handler;
32 32 enum { cache_size = 16 };
33 33 klassOop _exception_type;
34 34 address _pc[cache_size];
35 35 address _handler[cache_size];
36 36 int _count;
37 37 ExceptionCache* _next;
38 38
39 39 address pc_at(int index) { assert(index >= 0 && index < count(),""); return _pc[index]; }
40 40 void set_pc_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _pc[index] = a; }
41 41 address handler_at(int index) { assert(index >= 0 && index < count(),""); return _handler[index]; }
42 42 void set_handler_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _handler[index] = a; }
43 43 int count() { return _count; }
44 44 void increment_count() { _count++; }
45 45
46 46 public:
47 47
48 48 ExceptionCache(Handle exception, address pc, address handler);
49 49
50 50 klassOop exception_type() { return _exception_type; }
51 51 klassOop* exception_type_addr() { return &_exception_type; }
52 52 ExceptionCache* next() { return _next; }
53 53 void set_next(ExceptionCache *ec) { _next = ec; }
54 54
55 55 address match(Handle exception, address pc);
56 56 bool match_exception_with_space(Handle exception) ;
57 57 address test_address(address addr);
58 58 bool add_address_and_handler(address addr, address handler) ;
59 59
60 60 static address unwind_handler() { return _unwind_handler; }
61 61 };
62 62
63 63
64 64 // cache pc descs found in earlier inquiries
65 65 class PcDescCache VALUE_OBJ_CLASS_SPEC {
66 66 friend class VMStructs;
67 67 private:
68 68 enum { cache_size = 4 };
69 69 PcDesc* _last_pc_desc; // most recent pc_desc found
70 70 PcDesc* _pc_descs[cache_size]; // last cache_size pc_descs found
71 71 public:
72 72 PcDescCache() { debug_only(_last_pc_desc = NULL); }
73 73 void reset_to(PcDesc* initial_pc_desc);
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74 74 PcDesc* find_pc_desc(int pc_offset, bool approximate);
75 75 void add_pc_desc(PcDesc* pc_desc);
76 76 PcDesc* last_pc_desc() { return _last_pc_desc; }
77 77 };
78 78
79 79
80 80 // nmethods (native methods) are the compiled code versions of Java methods.
81 81
82 82 struct nmFlags {
83 83 friend class VMStructs;
84 - unsigned int version:8; // version number (0 = first version)
85 - unsigned int level:4; // optimization level
86 - unsigned int age:4; // age (in # of sweep steps)
87 -
88 - unsigned int state:2; // {alive, zombie, unloaded)
89 -
90 - unsigned int isUncommonRecompiled:1; // recompiled because of uncommon trap?
91 - unsigned int isToBeRecompiled:1; // to be recompiled as soon as it matures
92 - unsigned int hasFlushedDependencies:1; // Used for maintenance of dependencies
93 - unsigned int markedForReclamation:1; // Used by NMethodSweeper
84 + unsigned int version:8; // version number (0 = first version)
85 + unsigned int level:4; // optimization level
86 + unsigned int age:4; // age (in # of sweep steps)
87 +
88 + unsigned int state:2; // {alive, zombie, unloaded)
89 +
90 + unsigned int isUncommonRecompiled:1; // recompiled because of uncommon trap?
91 + unsigned int isToBeRecompiled:1; // to be recompiled as soon as it matures
92 + unsigned int hasFlushedDependencies:1; // Used for maintenance of dependencies
93 + unsigned int markedForReclamation:1; // Used by NMethodSweeper
94 94
95 - unsigned int has_unsafe_access:1; // May fault due to unsafe access.
95 + unsigned int has_unsafe_access:1; // May fault due to unsafe access.
96 + unsigned int has_method_handle_invokes:1; // Has this method MethodHandle invokes?
96 97
97 98 void clear();
98 99 };
99 100
100 101
101 102 // A nmethod contains:
102 103 // - header (the nmethod structure)
103 104 // [Relocation]
104 105 // - relocation information
105 106 // - constant part (doubles, longs and floats used in nmethod)
106 107 // [Code]
107 108 // - code body
108 109 // - exception handler
109 110 // - stub code
110 111 // [Debugging information]
111 112 // - oop array
112 113 // - data array
113 114 // - pcs
114 115 // [Exception handler table]
115 116 // - handler entry point array
116 117 // [Implicit Null Pointer exception table]
117 118 // - implicit null table array
118 119
119 120 class Dependencies;
120 121 class ExceptionHandlerTable;
121 122 class ImplicitExceptionTable;
122 123 class AbstractCompiler;
123 124 class xmlStream;
124 125
125 126 class nmethod : public CodeBlob {
126 127 friend class VMStructs;
127 128 friend class NMethodSweeper;
128 129 friend class CodeCache; // non-perm oops
129 130 private:
130 131 // Shared fields for all nmethod's
131 132 static int _zombie_instruction_size;
132 133
133 134 methodOop _method;
134 135 int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method
135 136
136 137 // To support simple linked-list chaining of nmethods:
137 138 nmethod* _osr_link; // from instanceKlass::osr_nmethods_head
138 139 nmethod* _scavenge_root_link; // from CodeCache::scavenge_root_nmethods
139 140
140 141 static nmethod* volatile _oops_do_mark_nmethods;
141 142 nmethod* volatile _oops_do_mark_link;
142 143
143 144 AbstractCompiler* _compiler; // The compiler which compiled this nmethod
144 145
145 146 // Offsets for different nmethod parts
146 147 int _exception_offset;
147 148 // All deoptee's will resume execution at this location described by this offset
148 149 int _deoptimize_offset;
149 150 #ifdef HAVE_DTRACE_H
150 151 int _trap_offset;
151 152 #endif // def HAVE_DTRACE_H
152 153 int _stub_offset;
153 154 int _consts_offset;
154 155 int _scopes_data_offset;
155 156 int _scopes_pcs_offset;
156 157 int _dependencies_offset;
157 158 int _handler_table_offset;
158 159 int _nul_chk_table_offset;
159 160 int _nmethod_end_offset;
160 161
161 162 // location in frame (offset for sp) that deopt can store the original
162 163 // pc during a deopt.
163 164 int _orig_pc_offset;
164 165
165 166 int _compile_id; // which compilation made this nmethod
166 167 int _comp_level; // compilation level
167 168
168 169 // offsets for entry points
169 170 address _entry_point; // entry point with class check
170 171 address _verified_entry_point; // entry point without class check
171 172 address _osr_entry_point; // entry point for on stack replacement
172 173
173 174 nmFlags flags; // various flags to keep track of nmethod state
174 175 bool _markedForDeoptimization; // Used for stack deoptimization
175 176 enum { alive = 0,
176 177 not_entrant = 1, // uncommon trap has happened but activations may still exist
177 178 zombie = 2,
178 179 unloaded = 3 };
179 180
180 181 // used by jvmti to track if an unload event has been posted for this nmethod.
181 182 bool _unload_reported;
182 183
183 184 jbyte _scavenge_root_state;
184 185
185 186 NOT_PRODUCT(bool _has_debug_info; )
186 187
187 188 // Nmethod Flushing lock (if non-zero, then the nmethod is not removed)
188 189 jint _lock_count;
189 190
190 191 // not_entrant method removal. Each mark_sweep pass will update
191 192 // this mark to current sweep invocation count if it is seen on the
192 193 // stack. An not_entrant method can be removed when there is no
193 194 // more activations, i.e., when the _stack_traversal_mark is less than
194 195 // current sweep traversal index.
195 196 long _stack_traversal_mark;
196 197
197 198 ExceptionCache *_exception_cache;
198 199 PcDescCache _pc_desc_cache;
199 200
200 201 // These are only used for compiled synchronized native methods to
201 202 // locate the owner and stack slot for the BasicLock so that we can
202 203 // properly revoke the bias of the owner if necessary. They are
203 204 // needed because there is no debug information for compiled native
204 205 // wrappers and the oop maps are insufficient to allow
205 206 // frame::retrieve_receiver() to work. Currently they are expected
206 207 // to be byte offsets from the Java stack pointer for maximum code
207 208 // sharing between platforms. Note that currently biased locking
208 209 // will never cause Class instances to be biased but this code
209 210 // handles the static synchronized case as well.
210 211 ByteSize _compiled_synchronized_native_basic_lock_owner_sp_offset;
211 212 ByteSize _compiled_synchronized_native_basic_lock_sp_offset;
212 213
213 214 friend class nmethodLocker;
214 215
215 216 // For native wrappers
216 217 nmethod(methodOop method,
217 218 int nmethod_size,
218 219 CodeOffsets* offsets,
219 220 CodeBuffer *code_buffer,
220 221 int frame_size,
221 222 ByteSize basic_lock_owner_sp_offset, /* synchronized natives only */
222 223 ByteSize basic_lock_sp_offset, /* synchronized natives only */
223 224 OopMapSet* oop_maps);
224 225
225 226 #ifdef HAVE_DTRACE_H
226 227 // For native wrappers
227 228 nmethod(methodOop method,
228 229 int nmethod_size,
229 230 CodeOffsets* offsets,
230 231 CodeBuffer *code_buffer,
231 232 int frame_size);
232 233 #endif // def HAVE_DTRACE_H
233 234
234 235 // Creation support
235 236 nmethod(methodOop method,
236 237 int nmethod_size,
237 238 int compile_id,
238 239 int entry_bci,
239 240 CodeOffsets* offsets,
240 241 int orig_pc_offset,
241 242 DebugInformationRecorder *recorder,
242 243 Dependencies* dependencies,
243 244 CodeBuffer *code_buffer,
244 245 int frame_size,
245 246 OopMapSet* oop_maps,
246 247 ExceptionHandlerTable* handler_table,
247 248 ImplicitExceptionTable* nul_chk_table,
248 249 AbstractCompiler* compiler,
249 250 int comp_level);
250 251
251 252 // helper methods
252 253 void* operator new(size_t size, int nmethod_size);
253 254
254 255 const char* reloc_string_for(u_char* begin, u_char* end);
255 256 void make_not_entrant_or_zombie(int state);
256 257 void inc_decompile_count();
257 258
258 259 // used to check that writes to nmFlags are done consistently.
259 260 static void check_safepoint() PRODUCT_RETURN;
260 261
261 262 // Used to manipulate the exception cache
262 263 void add_exception_cache_entry(ExceptionCache* new_entry);
263 264 ExceptionCache* exception_cache_entry_for_exception(Handle exception);
264 265
265 266 // Inform external interfaces that a compiled method has been unloaded
266 267 inline void post_compiled_method_unload();
267 268
268 269 public:
269 270 // create nmethod with entry_bci
270 271 static nmethod* new_nmethod(methodHandle method,
271 272 int compile_id,
272 273 int entry_bci,
273 274 CodeOffsets* offsets,
274 275 int orig_pc_offset,
275 276 DebugInformationRecorder* recorder,
276 277 Dependencies* dependencies,
277 278 CodeBuffer *code_buffer,
278 279 int frame_size,
279 280 OopMapSet* oop_maps,
280 281 ExceptionHandlerTable* handler_table,
281 282 ImplicitExceptionTable* nul_chk_table,
282 283 AbstractCompiler* compiler,
283 284 int comp_level);
284 285
285 286 static nmethod* new_native_nmethod(methodHandle method,
286 287 CodeBuffer *code_buffer,
287 288 int vep_offset,
288 289 int frame_complete,
289 290 int frame_size,
290 291 ByteSize receiver_sp_offset,
291 292 ByteSize basic_lock_sp_offset,
292 293 OopMapSet* oop_maps);
293 294
294 295 #ifdef HAVE_DTRACE_H
295 296 // The method we generate for a dtrace probe has to look
296 297 // like an nmethod as far as the rest of the system is concerned
297 298 // which is somewhat unfortunate.
298 299 static nmethod* new_dtrace_nmethod(methodHandle method,
299 300 CodeBuffer *code_buffer,
300 301 int vep_offset,
301 302 int trap_offset,
302 303 int frame_complete,
303 304 int frame_size);
304 305
305 306 int trap_offset() const { return _trap_offset; }
306 307 address trap_address() const { return code_begin() + _trap_offset; }
307 308
308 309 #endif // def HAVE_DTRACE_H
309 310
310 311 // accessors
311 312 methodOop method() const { return _method; }
312 313 AbstractCompiler* compiler() const { return _compiler; }
313 314
314 315 #ifndef PRODUCT
315 316 bool has_debug_info() const { return _has_debug_info; }
316 317 void set_has_debug_info(bool f) { _has_debug_info = false; }
317 318 #endif // NOT PRODUCT
318 319
319 320 // type info
320 321 bool is_nmethod() const { return true; }
321 322 bool is_java_method() const { return !method()->is_native(); }
322 323 bool is_native_method() const { return method()->is_native(); }
323 324 bool is_osr_method() const { return _entry_bci != InvocationEntryBci; }
324 325
325 326 bool is_compiled_by_c1() const;
326 327 bool is_compiled_by_c2() const;
327 328
328 329 // boundaries for different parts
329 330 address code_begin () const { return _entry_point; }
330 331 address code_end () const { return header_begin() + _stub_offset ; }
331 332 address exception_begin () const { return header_begin() + _exception_offset ; }
332 333 address deopt_handler_begin() const { return header_begin() + _deoptimize_offset ; }
333 334 address stub_begin () const { return header_begin() + _stub_offset ; }
334 335 address stub_end () const { return header_begin() + _consts_offset ; }
335 336 address consts_begin () const { return header_begin() + _consts_offset ; }
336 337 address consts_end () const { return header_begin() + _scopes_data_offset ; }
337 338 address scopes_data_begin () const { return header_begin() + _scopes_data_offset ; }
338 339 address scopes_data_end () const { return header_begin() + _scopes_pcs_offset ; }
339 340 PcDesc* scopes_pcs_begin () const { return (PcDesc*)(header_begin() + _scopes_pcs_offset ); }
340 341 PcDesc* scopes_pcs_end () const { return (PcDesc*)(header_begin() + _dependencies_offset); }
341 342 address dependencies_begin () const { return header_begin() + _dependencies_offset ; }
342 343 address dependencies_end () const { return header_begin() + _handler_table_offset ; }
343 344 address handler_table_begin() const { return header_begin() + _handler_table_offset ; }
344 345 address handler_table_end () const { return header_begin() + _nul_chk_table_offset ; }
345 346 address nul_chk_table_begin() const { return header_begin() + _nul_chk_table_offset ; }
346 347 address nul_chk_table_end () const { return header_begin() + _nmethod_end_offset ; }
347 348
348 349 int code_size () const { return code_end () - code_begin (); }
349 350 int stub_size () const { return stub_end () - stub_begin (); }
350 351 int consts_size () const { return consts_end () - consts_begin (); }
351 352 int scopes_data_size () const { return scopes_data_end () - scopes_data_begin (); }
352 353 int scopes_pcs_size () const { return (intptr_t)scopes_pcs_end () - (intptr_t)scopes_pcs_begin (); }
353 354 int dependencies_size () const { return dependencies_end () - dependencies_begin (); }
354 355 int handler_table_size() const { return handler_table_end() - handler_table_begin(); }
355 356 int nul_chk_table_size() const { return nul_chk_table_end() - nul_chk_table_begin(); }
356 357
357 358 int total_size () const;
358 359
359 360 bool code_contains (address addr) const { return code_begin () <= addr && addr < code_end (); }
360 361 bool stub_contains (address addr) const { return stub_begin () <= addr && addr < stub_end (); }
361 362 bool consts_contains (address addr) const { return consts_begin () <= addr && addr < consts_end (); }
362 363 bool scopes_data_contains (address addr) const { return scopes_data_begin () <= addr && addr < scopes_data_end (); }
363 364 bool scopes_pcs_contains (PcDesc* addr) const { return scopes_pcs_begin () <= addr && addr < scopes_pcs_end (); }
364 365 bool handler_table_contains(address addr) const { return handler_table_begin() <= addr && addr < handler_table_end(); }
365 366 bool nul_chk_table_contains(address addr) const { return nul_chk_table_begin() <= addr && addr < nul_chk_table_end(); }
366 367
367 368 // entry points
368 369 address entry_point() const { return _entry_point; } // normal entry point
369 370 address verified_entry_point() const { return _verified_entry_point; } // if klass is correct
370 371
371 372 // flag accessing and manipulation
372 373 bool is_in_use() const { return flags.state == alive; }
373 374 bool is_alive() const { return flags.state == alive || flags.state == not_entrant; }
374 375 bool is_not_entrant() const { return flags.state == not_entrant; }
375 376 bool is_zombie() const { return flags.state == zombie; }
376 377 bool is_unloaded() const { return flags.state == unloaded; }
377 378
378 379 // Make the nmethod non entrant. The nmethod will continue to be alive.
379 380 // It is used when an uncommon trap happens.
380 381 void make_not_entrant() { make_not_entrant_or_zombie(not_entrant); }
381 382 void make_zombie() { make_not_entrant_or_zombie(zombie); }
382 383
383 384 // used by jvmti to track if the unload event has been reported
384 385 bool unload_reported() { return _unload_reported; }
385 386 void set_unload_reported() { _unload_reported = true; }
386 387
387 388 bool is_marked_for_deoptimization() const { return _markedForDeoptimization; }
388 389 void mark_for_deoptimization() { _markedForDeoptimization = true; }
389 390
390 391 void make_unloaded(BoolObjectClosure* is_alive, oop cause);
391 392
392 393 bool has_dependencies() { return dependencies_size() != 0; }
393 394 void flush_dependencies(BoolObjectClosure* is_alive);
394 395 bool has_flushed_dependencies() { return flags.hasFlushedDependencies; }
395 396 void set_has_flushed_dependencies() {
396 397 check_safepoint();
397 398 assert(!has_flushed_dependencies(), "should only happen once");
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398 399 flags.hasFlushedDependencies = 1;
399 400 }
400 401
401 402 bool is_marked_for_reclamation() const { return flags.markedForReclamation; }
402 403 void mark_for_reclamation() { check_safepoint(); flags.markedForReclamation = 1; }
403 404 void unmark_for_reclamation() { check_safepoint(); flags.markedForReclamation = 0; }
404 405
405 406 bool has_unsafe_access() const { return flags.has_unsafe_access; }
406 407 void set_has_unsafe_access(bool z) { flags.has_unsafe_access = z; }
407 408
409 + bool has_method_handle_invokes() const { return flags.has_method_handle_invokes; }
410 + void set_has_method_handle_invokes(bool z) { flags.has_method_handle_invokes = z; }
411 +
408 412 int level() const { return flags.level; }
409 413 void set_level(int newLevel) { check_safepoint(); flags.level = newLevel; }
410 414
411 415 int comp_level() const { return _comp_level; }
412 416
413 417 int version() const { return flags.version; }
414 418 void set_version(int v);
415 419
416 420 // Non-perm oop support
417 421 bool on_scavenge_root_list() const { return (_scavenge_root_state & 1) != 0; }
418 422 protected:
419 423 enum { npl_on_list = 0x01, npl_marked = 0x10 };
420 424 void set_on_scavenge_root_list() { _scavenge_root_state = npl_on_list; }
421 425 void clear_on_scavenge_root_list() { _scavenge_root_state = 0; }
422 426 // assertion-checking and pruning logic uses the bits of _scavenge_root_state
423 427 #ifndef PRODUCT
424 428 void set_scavenge_root_marked() { _scavenge_root_state |= npl_marked; }
425 429 void clear_scavenge_root_marked() { _scavenge_root_state &= ~npl_marked; }
426 430 bool scavenge_root_not_marked() { return (_scavenge_root_state &~ npl_on_list) == 0; }
427 431 // N.B. there is no positive marked query, and we only use the not_marked query for asserts.
428 432 #endif //PRODUCT
429 433 nmethod* scavenge_root_link() const { return _scavenge_root_link; }
430 434 void set_scavenge_root_link(nmethod *n) { _scavenge_root_link = n; }
431 435
432 436 public:
433 437
434 438 // Sweeper support
435 439 long stack_traversal_mark() { return _stack_traversal_mark; }
436 440 void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; }
437 441
438 442 // Exception cache support
439 443 ExceptionCache* exception_cache() const { return _exception_cache; }
440 444 void set_exception_cache(ExceptionCache *ec) { _exception_cache = ec; }
441 445 address handler_for_exception_and_pc(Handle exception, address pc);
442 446 void add_handler_for_exception_and_pc(Handle exception, address pc, address handler);
443 447 void remove_from_exception_cache(ExceptionCache* ec);
444 448
445 449 // implicit exceptions support
446 450 address continuation_for_implicit_exception(address pc);
447 451
448 452 // On-stack replacement support
449 453 int osr_entry_bci() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _entry_bci; }
450 454 address osr_entry() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _osr_entry_point; }
451 455 void invalidate_osr_method();
452 456 nmethod* osr_link() const { return _osr_link; }
453 457 void set_osr_link(nmethod *n) { _osr_link = n; }
454 458
455 459 // tells whether frames described by this nmethod can be deoptimized
456 460 // note: native wrappers cannot be deoptimized.
457 461 bool can_be_deoptimized() const { return is_java_method(); }
458 462
459 463 // Inline cache support
460 464 void clear_inline_caches();
461 465 void cleanup_inline_caches();
462 466 bool inlinecache_check_contains(address addr) const {
463 467 return (addr >= instructions_begin() && addr < verified_entry_point());
464 468 }
465 469
466 470 // unlink and deallocate this nmethod
467 471 // Only NMethodSweeper class is expected to use this. NMethodSweeper is not
468 472 // expected to use any other private methods/data in this class.
469 473
470 474 protected:
471 475 void flush();
472 476
473 477 public:
474 478 // If returning true, it is unsafe to remove this nmethod even though it is a zombie
475 479 // nmethod, since the VM might have a reference to it. Should only be called from a safepoint.
476 480 bool is_locked_by_vm() const { return _lock_count >0; }
477 481
478 482 // See comment at definition of _last_seen_on_stack
479 483 void mark_as_seen_on_stack();
480 484 bool can_not_entrant_be_converted();
481 485
482 486 // Evolution support. We make old (discarded) compiled methods point to new methodOops.
483 487 void set_method(methodOop method) { _method = method; }
484 488
485 489 // GC support
486 490 void do_unloading(BoolObjectClosure* is_alive, OopClosure* keep_alive,
487 491 bool unloading_occurred);
488 492 bool can_unload(BoolObjectClosure* is_alive, OopClosure* keep_alive,
489 493 oop* root, bool unloading_occurred);
490 494
491 495 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map,
492 496 OopClosure* f);
493 497 virtual void oops_do(OopClosure* f) { oops_do(f, false); }
494 498 void oops_do(OopClosure* f, bool do_strong_roots_only);
495 499 bool detect_scavenge_root_oops();
496 500 void verify_scavenge_root_oops() PRODUCT_RETURN;
497 501
498 502 bool test_set_oops_do_mark();
499 503 static void oops_do_marking_prologue();
500 504 static void oops_do_marking_epilogue();
501 505 static bool oops_do_marking_is_active() { return _oops_do_mark_nmethods != NULL; }
502 506 DEBUG_ONLY(bool test_oops_do_mark() { return _oops_do_mark_link != NULL; })
503 507
504 508 // ScopeDesc for an instruction
505 509 ScopeDesc* scope_desc_at(address pc);
506 510
507 511 private:
508 512 ScopeDesc* scope_desc_in(address begin, address end);
509 513
510 514 address* orig_pc_addr(const frame* fr ) { return (address*) ((address)fr->unextended_sp() + _orig_pc_offset); }
511 515
512 516 PcDesc* find_pc_desc_internal(address pc, bool approximate);
513 517
514 518 PcDesc* find_pc_desc(address pc, bool approximate) {
515 519 PcDesc* desc = _pc_desc_cache.last_pc_desc();
516 520 if (desc != NULL && desc->pc_offset() == pc - instructions_begin()) {
517 521 return desc;
518 522 }
519 523 return find_pc_desc_internal(pc, approximate);
520 524 }
521 525
522 526 public:
523 527 // ScopeDesc retrieval operation
524 528 PcDesc* pc_desc_at(address pc) { return find_pc_desc(pc, false); }
525 529 // pc_desc_near returns the first PcDesc at or after the givne pc.
526 530 PcDesc* pc_desc_near(address pc) { return find_pc_desc(pc, true); }
527 531
528 532 public:
529 533 // copying of debugging information
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530 534 void copy_scopes_pcs(PcDesc* pcs, int count);
531 535 void copy_scopes_data(address buffer, int size);
532 536
533 537 // deopt
534 538 // return true is the pc is one would expect if the frame is being deopted.
535 539 bool is_deopt_pc(address pc);
536 540 // Accessor/mutator for the original pc of a frame before a frame was deopted.
537 541 address get_original_pc(const frame* fr) { return *orig_pc_addr(fr); }
538 542 void set_original_pc(const frame* fr, address pc) { *orig_pc_addr(fr) = pc; }
539 543
544 + // MethodHandle
545 + bool is_method_handle_return(address return_pc);
546 +
540 547 // jvmti support:
541 548 void post_compiled_method_load_event();
542 549
543 550 // verify operations
544 551 void verify();
545 552 void verify_scopes();
546 553 void verify_interrupt_point(address interrupt_point);
547 554
548 555 // printing support
549 556 void print() const;
550 557 void print_code();
551 558 void print_relocations() PRODUCT_RETURN;
552 559 void print_pcs() PRODUCT_RETURN;
553 560 void print_scopes() PRODUCT_RETURN;
554 561 void print_dependencies() PRODUCT_RETURN;
555 562 void print_value_on(outputStream* st) const PRODUCT_RETURN;
556 563 void print_calls(outputStream* st) PRODUCT_RETURN;
557 564 void print_handler_table() PRODUCT_RETURN;
558 565 void print_nul_chk_table() PRODUCT_RETURN;
559 566 void print_nmethod(bool print_code);
560 567
561 568 void print_on(outputStream* st, const char* title) const;
562 569
563 570 // Logging
564 571 void log_identity(xmlStream* log) const;
565 572 void log_new_nmethod() const;
566 573 void log_state_change(int state) const;
567 574
568 575 // Prints a comment for one native instruction (reloc info, pc desc)
569 576 void print_code_comment_on(outputStream* st, int column, address begin, address end);
570 577 static void print_statistics() PRODUCT_RETURN;
571 578
572 579 // Compiler task identification. Note that all OSR methods
573 580 // are numbered in an independent sequence if CICountOSR is true,
574 581 // and native method wrappers are also numbered independently if
575 582 // CICountNative is true.
576 583 int compile_id() const { return _compile_id; }
577 584 const char* compile_kind() const;
578 585
579 586 // For debugging
580 587 // CompiledIC* IC_at(char* p) const;
581 588 // PrimitiveIC* primitiveIC_at(char* p) const;
582 589 oop embeddedOop_at(address p);
583 590
584 591 // tells if any of this method's dependencies have been invalidated
585 592 // (this is expensive!)
586 593 bool check_all_dependencies();
587 594
588 595 // tells if this compiled method is dependent on the given changes,
589 596 // and the changes have invalidated it
590 597 bool check_dependency_on(DepChange& changes);
591 598
592 599 // Evolution support. Tells if this compiled method is dependent on any of
593 600 // methods m() of class dependee, such that if m() in dependee is replaced,
594 601 // this compiled method will have to be deoptimized.
595 602 bool is_evol_dependent_on(klassOop dependee);
596 603
597 604 // Fast breakpoint support. Tells if this compiled method is
598 605 // dependent on the given method. Returns true if this nmethod
599 606 // corresponds to the given method as well.
600 607 bool is_dependent_on_method(methodOop dependee);
601 608
602 609 // is it ok to patch at address?
603 610 bool is_patchable_at(address instr_address);
604 611
605 612 // UseBiasedLocking support
606 613 ByteSize compiled_synchronized_native_basic_lock_owner_sp_offset() {
607 614 return _compiled_synchronized_native_basic_lock_owner_sp_offset;
608 615 }
609 616 ByteSize compiled_synchronized_native_basic_lock_sp_offset() {
610 617 return _compiled_synchronized_native_basic_lock_sp_offset;
611 618 }
612 619
613 620 // support for code generation
614 621 static int verified_entry_point_offset() { return offset_of(nmethod, _verified_entry_point); }
615 622 static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); }
616 623 static int entry_bci_offset() { return offset_of(nmethod, _entry_bci); }
617 624
618 625 };
619 626
620 627 // Locks an nmethod so its code will not get removed, even if it is a zombie/not_entrant method
621 628 class nmethodLocker : public StackObj {
622 629 nmethod* _nm;
623 630
624 631 static void lock_nmethod(nmethod* nm); // note: nm can be NULL
625 632 static void unlock_nmethod(nmethod* nm); // (ditto)
626 633
627 634 public:
628 635 nmethodLocker(address pc); // derive nm from pc
629 636 nmethodLocker(nmethod *nm) { _nm = nm; lock_nmethod(_nm); }
630 637 nmethodLocker() { _nm = NULL; }
631 638 ~nmethodLocker() { unlock_nmethod(_nm); }
632 639
633 640 nmethod* code() { return _nm; }
634 641 void set_code(nmethod* new_nm) {
635 642 unlock_nmethod(_nm); // note: This works even if _nm==new_nm.
636 643 _nm = new_nm;
637 644 lock_nmethod(_nm);
638 645 }
639 646 };
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