jdk8-mips64-public/hotspot: src/cpu/ppc/vm/javaFrameAnchor

src/cpu/ppc/vm/javaFrameAnchor_ppc.hpp@41b780b43b74 (annotated)

src/cpu/ppc/vm/javaFrameAnchor_ppc.hpp

Wed, 27 Nov 2013 16:16:21 -0800

author: goetz
date: Wed, 27 Nov 2013 16:16:21 -0800
changeset 6490: 41b780b43b74
parent 6458: ec28f9c041ff
child 6512: fd1b9f02cc91
permissions: -rw-r--r--

8029015: PPC64 (part 216): opto: trap based null and range checks
Summary: On PPC64 use tdi instruction that does a compare and raises SIGTRAP for NULL and range checks.
Reviewed-by: kvn

 /*
  * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2012, 2013 SAP AG. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef CPU_PPC_VM_JAVAFRAMEANCHOR_PPC_HPP
 #define CPU_PPC_VM_JAVAFRAMEANCHOR_PPC_HPP
 #ifndef CC_INTERP
 #error "CC_INTERP must be defined on PPC64"
 #endif
 public:
   // Each arch must define reset, save, restore
   // These are used by objects that only care about:
   //  1 - initializing a new state (thread creation, javaCalls)
   //  2 - saving a current state (javaCalls)
   //  3 - restoring an old state (javaCalls)
   inline void clear(void) {
     // clearing _last_Java_sp must be first
     _last_Java_sp = NULL;
     // fence?
     OrderAccess::release();
     _last_Java_pc = NULL;
   }
   inline void set(intptr_t* sp, address pc) {
     _last_Java_pc = pc;
     OrderAccess::release();
     _last_Java_sp = sp;
   }
   void copy(JavaFrameAnchor* src) {
     // In order to make sure the transition state is valid for "this".
     // We must clear _last_Java_sp before copying the rest of the new data.
     //
     // Hack Alert: Temporary bugfix for 4717480/4721647
     // To act like previous version (pd_cache_state) don't NULL _last_Java_sp
     // unless the value is changing.
     if (_last_Java_sp != src->_last_Java_sp) {
       _last_Java_sp = NULL;
       OrderAccess::release();
     }
     _last_Java_pc = src->_last_Java_pc;
     // Must be last so profiler will always see valid frame if has_last_frame() is true.
     OrderAccess::release();
     _last_Java_sp = src->_last_Java_sp;
   }
   // Always walkable.
   bool walkable(void) { return true; }
   // Never any thing to do since we are always walkable and can find address of return addresses.
   void make_walkable(JavaThread* thread) { }
   intptr_t* last_Java_sp(void) const  { return _last_Java_sp; }
   address last_Java_pc(void)          { return _last_Java_pc; }
   void set_last_Java_sp(intptr_t* sp) { OrderAccess::release(); _last_Java_sp = sp; }
 #endif // CPU_PPC_VM_JAVAFRAMEANCHOR_PPC_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/ppc/vm/javaFrameAnchor_ppc.hpp@41b780b43b74 (annotated)

src/cpu/ppc/vm/javaFrameAnchor_ppc.hpp