174
175 // set during construction
176 unsigned int _has_unsafe_access:1; // May fault due to unsafe access.
177 unsigned int _has_method_handle_invokes:1; // Has this method MethodHandle invokes?
178
179 // Protected by Patching_lock
180 unsigned char _state; // {alive, not_entrant, zombie, unloaded}
181
182 #ifdef ASSERT
183 bool _oops_are_stale; // indicates that it's no longer safe to access oops section
184 #endif
185
186 enum { alive = 0,
187 not_entrant = 1, // uncommon trap has happened but activations may still exist
188 zombie = 2,
189 unloaded = 3 };
190
191
192 jbyte _scavenge_root_state;
193
194 NOT_PRODUCT(bool _has_debug_info; )
195
196 // Nmethod Flushing lock. If non-zero, then the nmethod is not removed
197 // and is not made into a zombie. However, once the nmethod is made into
198 // a zombie, it will be locked one final time if CompiledMethodUnload
199 // event processing needs to be done.
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 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
312 #ifdef HAVE_DTRACE_H
313 // The method we generate for a dtrace probe has to look
314 // like an nmethod as far as the rest of the system is concerned
315 // which is somewhat unfortunate.
316 static nmethod* new_dtrace_nmethod(methodHandle method,
317 CodeBuffer *code_buffer,
318 int vep_offset,
319 int trap_offset,
320 int frame_complete,
321 int frame_size);
322
323 int trap_offset() const { return _trap_offset; }
324 address trap_address() const { return insts_begin() + _trap_offset; }
325
326 #endif // def HAVE_DTRACE_H
327
328 // accessors
329 methodOop method() const { return _method; }
330 AbstractCompiler* compiler() const { return _compiler; }
331
332 #ifndef PRODUCT
333 bool has_debug_info() const { return _has_debug_info; }
334 void set_has_debug_info(bool f) { _has_debug_info = false; }
335 #endif // NOT PRODUCT
336
337 // type info
338 bool is_nmethod() const { return true; }
339 bool is_java_method() const { return !method()->is_native(); }
340 bool is_native_method() const { return method()->is_native(); }
341 bool is_osr_method() const { return _entry_bci != InvocationEntryBci; }
342
343 bool is_compiled_by_c1() const;
344 bool is_compiled_by_c2() const;
345 bool is_compiled_by_shark() const;
346
347 // boundaries for different parts
348 address consts_begin () const { return header_begin() + _consts_offset ; }
349 address consts_end () const { return header_begin() + code_offset() ; }
350 address insts_begin () const { return header_begin() + code_offset() ; }
351 address insts_end () const { return header_begin() + _stub_offset ; }
352 address stub_begin () const { return header_begin() + _stub_offset ; }
353 address stub_end () const { return header_begin() + _oops_offset ; }
354 address exception_begin () const { return header_begin() + _exception_offset ; }
355 address deopt_handler_begin () const { return header_begin() + _deoptimize_offset ; }
356 address deopt_mh_handler_begin() const { return header_begin() + _deoptimize_mh_offset ; }
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174
175 // set during construction
176 unsigned int _has_unsafe_access:1; // May fault due to unsafe access.
177 unsigned int _has_method_handle_invokes:1; // Has this method MethodHandle invokes?
178
179 // Protected by Patching_lock
180 unsigned char _state; // {alive, not_entrant, zombie, unloaded}
181
182 #ifdef ASSERT
183 bool _oops_are_stale; // indicates that it's no longer safe to access oops section
184 #endif
185
186 enum { alive = 0,
187 not_entrant = 1, // uncommon trap has happened but activations may still exist
188 zombie = 2,
189 unloaded = 3 };
190
191
192 jbyte _scavenge_root_state;
193
194 // Nmethod Flushing lock. If non-zero, then the nmethod is not removed
195 // and is not made into a zombie. However, once the nmethod is made into
196 // a zombie, it will be locked one final time if CompiledMethodUnload
197 // event processing needs to be done.
198 jint _lock_count;
199
200 // not_entrant method removal. Each mark_sweep pass will update
201 // this mark to current sweep invocation count if it is seen on the
202 // stack. An not_entrant method can be removed when there is no
203 // more activations, i.e., when the _stack_traversal_mark is less than
204 // current sweep traversal index.
205 long _stack_traversal_mark;
206
207 ExceptionCache *_exception_cache;
208 PcDescCache _pc_desc_cache;
209
210 // These are used for compiled synchronized native methods to
211 // locate the owner and stack slot for the BasicLock so that we can
212 // properly revoke the bias of the owner if necessary. They are
213 // needed because there is no debug information for compiled native
310 #ifdef HAVE_DTRACE_H
311 // The method we generate for a dtrace probe has to look
312 // like an nmethod as far as the rest of the system is concerned
313 // which is somewhat unfortunate.
314 static nmethod* new_dtrace_nmethod(methodHandle method,
315 CodeBuffer *code_buffer,
316 int vep_offset,
317 int trap_offset,
318 int frame_complete,
319 int frame_size);
320
321 int trap_offset() const { return _trap_offset; }
322 address trap_address() const { return insts_begin() + _trap_offset; }
323
324 #endif // def HAVE_DTRACE_H
325
326 // accessors
327 methodOop method() const { return _method; }
328 AbstractCompiler* compiler() const { return _compiler; }
329
330 // type info
331 bool is_nmethod() const { return true; }
332 bool is_java_method() const { return !method()->is_native(); }
333 bool is_native_method() const { return method()->is_native(); }
334 bool is_osr_method() const { return _entry_bci != InvocationEntryBci; }
335
336 bool is_compiled_by_c1() const;
337 bool is_compiled_by_c2() const;
338 bool is_compiled_by_shark() const;
339
340 // boundaries for different parts
341 address consts_begin () const { return header_begin() + _consts_offset ; }
342 address consts_end () const { return header_begin() + code_offset() ; }
343 address insts_begin () const { return header_begin() + code_offset() ; }
344 address insts_end () const { return header_begin() + _stub_offset ; }
345 address stub_begin () const { return header_begin() + _stub_offset ; }
346 address stub_end () const { return header_begin() + _oops_offset ; }
347 address exception_begin () const { return header_begin() + _exception_offset ; }
348 address deopt_handler_begin () const { return header_begin() + _deoptimize_offset ; }
349 address deopt_mh_handler_begin() const { return header_begin() + _deoptimize_mh_offset ; }
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