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comparison src/share/vm/code/nmethod.hpp @ 989:148e5441d916

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6863023: need non-perm oops in code cache for JSR 292 Summary: Make a special root-list for those few nmethods which might contain non-perm oops. Reviewed-by: twisti, kvn, never, jmasa, ysr
author jrose
date Tue, 15 Sep 2009 21:53:47 -0700
parents 98cb887364d3
children 54b3b351d6f9
comparison
equal deleted inserted replaced
987:00977607da34 989:148e5441d916
123 class xmlStream; 123 class xmlStream;
124 124
125 class nmethod : public CodeBlob { 125 class nmethod : public CodeBlob {
126 friend class VMStructs; 126 friend class VMStructs;
127 friend class NMethodSweeper; 127 friend class NMethodSweeper;
128 friend class CodeCache; // non-perm oops
128 private: 129 private:
129 // Shared fields for all nmethod's 130 // Shared fields for all nmethod's
130 static int _zombie_instruction_size; 131 static int _zombie_instruction_size;
131 132
132 methodOop _method; 133 methodOop _method;
133 int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method 134 int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method
134 135
135 nmethod* _link; // To support simple linked-list chaining of nmethods 136 // To support simple linked-list chaining of nmethods:
137 nmethod* _osr_link; // from instanceKlass::osr_nmethods_head
138 nmethod* _scavenge_root_link; // from CodeCache::scavenge_root_nmethods
139
140 static nmethod* volatile _oops_do_mark_nmethods;
141 nmethod* volatile _oops_do_mark_link;
136 142
137 AbstractCompiler* _compiler; // The compiler which compiled this nmethod 143 AbstractCompiler* _compiler; // The compiler which compiled this nmethod
138 144
139 // Offsets for different nmethod parts 145 // Offsets for different nmethod parts
140 int _exception_offset; 146 int _exception_offset;
171 zombie = 2, 177 zombie = 2,
172 unloaded = 3 }; 178 unloaded = 3 };
173 179
174 // used by jvmti to track if an unload event has been posted for this nmethod. 180 // used by jvmti to track if an unload event has been posted for this nmethod.
175 bool _unload_reported; 181 bool _unload_reported;
182
183 jbyte _scavenge_root_state;
176 184
177 NOT_PRODUCT(bool _has_debug_info; ) 185 NOT_PRODUCT(bool _has_debug_info; )
178 186
179 // Nmethod Flushing lock (if non-zero, then the nmethod is not removed) 187 // Nmethod Flushing lock (if non-zero, then the nmethod is not removed)
180 jint _lock_count; 188 jint _lock_count;
240 AbstractCompiler* compiler, 248 AbstractCompiler* compiler,
241 int comp_level); 249 int comp_level);
242 250
243 // helper methods 251 // helper methods
244 void* operator new(size_t size, int nmethod_size); 252 void* operator new(size_t size, int nmethod_size);
245 void check_store();
246 253
247 const char* reloc_string_for(u_char* begin, u_char* end); 254 const char* reloc_string_for(u_char* begin, u_char* end);
248 void make_not_entrant_or_zombie(int state); 255 void make_not_entrant_or_zombie(int state);
249 void inc_decompile_count(); 256 void inc_decompile_count();
250 257
405 int comp_level() const { return _comp_level; } 412 int comp_level() const { return _comp_level; }
406 413
407 int version() const { return flags.version; } 414 int version() const { return flags.version; }
408 void set_version(int v); 415 void set_version(int v);
409 416
417 // Non-perm oop support
418 bool on_scavenge_root_list() const { return (_scavenge_root_state & 1) != 0; }
419 protected:
420 enum { npl_on_list = 0x01, npl_marked = 0x10 };
421 void set_on_scavenge_root_list() { _scavenge_root_state = npl_on_list; }
422 void clear_on_scavenge_root_list() { _scavenge_root_state = 0; }
423 // assertion-checking and pruning logic uses the bits of _scavenge_root_state
424 #ifndef PRODUCT
425 void set_scavenge_root_marked() { _scavenge_root_state |= npl_marked; }
426 void clear_scavenge_root_marked() { _scavenge_root_state &= ~npl_marked; }
427 bool scavenge_root_not_marked() { return (_scavenge_root_state &~ npl_on_list) == 0; }
428 // N.B. there is no positive marked query, and we only use the not_marked query for asserts.
429 #endif //PRODUCT
430 nmethod* scavenge_root_link() const { return _scavenge_root_link; }
431 void set_scavenge_root_link(nmethod *n) { _scavenge_root_link = n; }
432
433 public:
434
410 // Sweeper support 435 // Sweeper support
411 long stack_traversal_mark() { return _stack_traversal_mark; } 436 long stack_traversal_mark() { return _stack_traversal_mark; }
412 void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; } 437 void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; }
413 438
414 // Exception cache support 439 // Exception cache support
423 448
424 // On-stack replacement support 449 // On-stack replacement support
425 int osr_entry_bci() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _entry_bci; } 450 int osr_entry_bci() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _entry_bci; }
426 address osr_entry() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _osr_entry_point; } 451 address osr_entry() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _osr_entry_point; }
427 void invalidate_osr_method(); 452 void invalidate_osr_method();
428 nmethod* link() const { return _link; } 453 nmethod* osr_link() const { return _osr_link; }
429 void set_link(nmethod *n) { _link = n; } 454 void set_osr_link(nmethod *n) { _osr_link = n; }
430 455
431 // tells whether frames described by this nmethod can be deoptimized 456 // tells whether frames described by this nmethod can be deoptimized
432 // note: native wrappers cannot be deoptimized. 457 // note: native wrappers cannot be deoptimized.
433 bool can_be_deoptimized() const { return is_java_method(); } 458 bool can_be_deoptimized() const { return is_java_method(); }
434 459
465 oop* root, bool unloading_occurred); 490 oop* root, bool unloading_occurred);
466 491
467 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, 492 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map,
468 OopClosure* f); 493 OopClosure* f);
469 void oops_do(OopClosure* f); 494 void oops_do(OopClosure* f);
495 bool detect_scavenge_root_oops();
496 void verify_scavenge_root_oops() PRODUCT_RETURN;
497
498 bool test_set_oops_do_mark();
499 static void oops_do_marking_prologue();
500 static void oops_do_marking_epilogue();
501 static bool oops_do_marking_is_active() { return _oops_do_mark_nmethods != NULL; }
502 DEBUG_ONLY(bool test_oops_do_mark() { return _oops_do_mark_link != NULL; })
470 503
471 // ScopeDesc for an instruction 504 // ScopeDesc for an instruction
472 ScopeDesc* scope_desc_at(address pc); 505 ScopeDesc* scope_desc_at(address pc);
473 506
474 private: 507 private: