Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 1998, 2013, Oracle and/or its affiliates. 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 OS_CPU_SOLARIS_SPARC_VM_THREAD_SOLARIS_SPARC_HPP

 #define OS_CPU_SOLARIS_SPARC_VM_THREAD_SOLARIS_SPARC_HPP

 private:

   void pd_initialize() {

     _anchor.clear();

     _base_of_stack_pointer        = NULL;

   }

   frame pd_last_frame() {

     assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");

     assert(_anchor.walkable(), "thread has not dumped its register windows yet");

     assert(_anchor.last_Java_pc() != NULL, "Ack no pc!");

     return frame(last_Java_sp(), frame::unpatchable, _anchor.last_Java_pc());

   }

   // Sometimes the trap handler needs to record both PC and NPC.

   // This is a SPARC-specific companion to Thread::set_saved_exception_pc.

   address _saved_exception_npc;

   // In polling_page_safepoint_handler_blob(s) we have to tail call other

   // blobs without blowing any registers.  A tail call requires some

   // register to jump with and we can't blow any registers, so it must

   // be restored in the delay slot.  'restore' cannot be used as it

   // will chop the heads off of 64-bit %o registers in the 32-bit

   // build.  Instead we reload the registers using G2_thread and this

   // location.  Must be 64bits in the 32-bit LION build.

   jdouble _o_reg_temps[6];

   // a stack pointer older than any java frame stack pointer.  It is

   // used to validate stack pointers in frame::next_younger_sp (it

   // provides the upper bound in the range check).  This is necessary

   // on Solaris/SPARC since the ucontext passed to a signal handler is

   // sometimes corrupt and we need a way to check the extracted sp.

   intptr_t* _base_of_stack_pointer;

 public:

   static int o_reg_temps_offset_in_bytes() { return offset_of(JavaThread, _o_reg_temps); }

 #ifndef _LP64

   address o_reg_temps(int i) { return (address)&_o_reg_temps[i]; }

 #endif

   static int saved_exception_npc_offset_in_bytes() { return offset_of(JavaThread,_saved_exception_npc); }

   address  saved_exception_npc()             { return _saved_exception_npc; }

   void set_saved_exception_npc(address a)    { _saved_exception_npc = a; }

 public:

   intptr_t* base_of_stack_pointer() { return _base_of_stack_pointer; }

   void set_base_of_stack_pointer(intptr_t* base_sp) {

     _base_of_stack_pointer = base_sp;

   }

   void record_base_of_stack_pointer() {

     intptr_t *sp = (intptr_t *)(((intptr_t)StubRoutines::Sparc::flush_callers_register_windows_func()()));

     intptr_t *ysp;

     while((ysp = (intptr_t*)sp[FP->sp_offset_in_saved_window()]) != NULL) {

       sp = (intptr_t *)((intptr_t)ysp + STACK_BIAS);

     }

     _base_of_stack_pointer = sp;

   }

   bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext,

     bool isInJava);

   bool pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava);

 private:

   bool pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava, bool makeWalkable);

 public:

   // These routines are only used on cpu architectures that

   // have separate register stacks (Itanium).

   static bool register_stack_overflow() { return false; }

   static void enable_register_stack_guard() {}

   static void disable_register_stack_guard() {}

 #endif // OS_CPU_SOLARIS_SPARC_VM_THREAD_SOLARIS_SPARC_HPP