src/share/vm/code/nmethod.hpp
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src/share/vm/code/nmethod.hpp

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rev 2029 : 6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
Summary: Defer posting events from the compiler thread: use service thread
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* * *
   1 /*
   2  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
   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  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *


 679 
 680   // UseBiasedLocking support
 681   ByteSize native_receiver_sp_offset() {
 682     return _native_receiver_sp_offset;
 683   }
 684   ByteSize native_basic_lock_sp_offset() {
 685     return _native_basic_lock_sp_offset;
 686   }
 687 
 688   // support for code generation
 689   static int verified_entry_point_offset()        { return offset_of(nmethod, _verified_entry_point); }
 690   static int osr_entry_point_offset()             { return offset_of(nmethod, _osr_entry_point); }
 691   static int entry_bci_offset()                   { return offset_of(nmethod, _entry_bci); }
 692 
 693 };
 694 
 695 // Locks an nmethod so its code will not get removed, even if it is a zombie/not_entrant method
 696 class nmethodLocker : public StackObj {
 697   nmethod* _nm;
 698 


 699   static void lock_nmethod(nmethod* nm);   // note: nm can be NULL
 700   static void unlock_nmethod(nmethod* nm); // (ditto)
 701 
 702  public:
 703   nmethodLocker(address pc); // derive nm from pc
 704   nmethodLocker(nmethod *nm) { _nm = nm; lock_nmethod(_nm); }
 705   nmethodLocker() { _nm = NULL; }
 706   ~nmethodLocker() { unlock_nmethod(_nm); }
 707 
 708   nmethod* code() { return _nm; }
 709   void set_code(nmethod* new_nm) {
 710     unlock_nmethod(_nm);   // note:  This works even if _nm==new_nm.
 711     _nm = new_nm;
 712     lock_nmethod(_nm);
 713   }
 714 };
 715 
 716 #endif // SHARE_VM_CODE_NMETHOD_HPP
   1 /*
   2  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
   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  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *


 679 
 680   // UseBiasedLocking support
 681   ByteSize native_receiver_sp_offset() {
 682     return _native_receiver_sp_offset;
 683   }
 684   ByteSize native_basic_lock_sp_offset() {
 685     return _native_basic_lock_sp_offset;
 686   }
 687 
 688   // support for code generation
 689   static int verified_entry_point_offset()        { return offset_of(nmethod, _verified_entry_point); }
 690   static int osr_entry_point_offset()             { return offset_of(nmethod, _osr_entry_point); }
 691   static int entry_bci_offset()                   { return offset_of(nmethod, _entry_bci); }
 692 
 693 };
 694 
 695 // Locks an nmethod so its code will not get removed, even if it is a zombie/not_entrant method
 696 class nmethodLocker : public StackObj {
 697   nmethod* _nm;
 698 
 699  public:
 700 
 701   static void lock_nmethod(nmethod* nm);   // note: nm can be NULL
 702   static void unlock_nmethod(nmethod* nm); // (ditto)
 703 

 704   nmethodLocker(address pc); // derive nm from pc
 705   nmethodLocker(nmethod *nm) { _nm = nm; lock_nmethod(_nm); }
 706   nmethodLocker() { _nm = NULL; }
 707   ~nmethodLocker() { unlock_nmethod(_nm); }
 708 
 709   nmethod* code() { return _nm; }
 710   void set_code(nmethod* new_nm) {
 711     unlock_nmethod(_nm);   // note:  This works even if _nm==new_nm.
 712     _nm = new_nm;
 713     lock_nmethod(_nm);
 714   }
 715 };
 716 
 717 #endif // SHARE_VM_CODE_NMETHOD_HPP
src/share/vm/code/nmethod.hpp
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