1 /*
   2  * Copyright (c) 1998, 2013, 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  *
  23  */
  24 
  25 #ifndef OS_CPU_SOLARIS_SPARC_VM_THREAD_SOLARIS_SPARC_HPP
  26 #define OS_CPU_SOLARIS_SPARC_VM_THREAD_SOLARIS_SPARC_HPP
  27 private:
  28 
  29   void pd_initialize() {
  30     _anchor.clear();
  31     _base_of_stack_pointer        = NULL;
  32   }
  33 
  34   frame pd_last_frame() {
  35     assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
  36     assert(_anchor.walkable(), "thread has not dumped its register windows yet");
  37 
  38     assert(_anchor.last_Java_pc() != NULL, "Ack no pc!");
  39     return frame(last_Java_sp(), frame::unpatchable, _anchor.last_Java_pc());
  40   }
  41 
  42   // Sometimes the trap handler needs to record both PC and NPC.
  43   // This is a SPARC-specific companion to Thread::set_saved_exception_pc.
  44   address _saved_exception_npc;
  45 
  46   // In polling_page_safepoint_handler_blob(s) we have to tail call other
  47   // blobs without blowing any registers.  A tail call requires some
  48   // register to jump with and we can't blow any registers, so it must
  49   // be restored in the delay slot.  'restore' cannot be used as it
  50   // will chop the heads off of 64-bit %o registers in the 32-bit
  51   // build.  Instead we reload the registers using G2_thread and this
  52   // location.  Must be 64bits in the 32-bit LION build.
  53   jdouble _o_reg_temps[6];
  54 
  55   // a stack pointer older than any java frame stack pointer.  It is
  56   // used to validate stack pointers in frame::next_younger_sp (it
  57   // provides the upper bound in the range check).  This is necessary
  58   // on Solaris/SPARC since the ucontext passed to a signal handler is
  59   // sometimes corrupt and we need a way to check the extracted sp.
  60   intptr_t* _base_of_stack_pointer;
  61 
  62 public:
  63 
  64   static int o_reg_temps_offset_in_bytes() { return offset_of(JavaThread, _o_reg_temps); }
  65 
  66   address o_reg_temps(int i) { return (address)&_o_reg_temps[i]; }
  67 
  68   static int saved_exception_npc_offset_in_bytes() { return offset_of(JavaThread,_saved_exception_npc); }
  69 
  70   address  saved_exception_npc()             { return _saved_exception_npc; }
  71   void set_saved_exception_npc(address a)    { _saved_exception_npc = a; }
  72 
  73 
  74 public:
  75 
  76   intptr_t* base_of_stack_pointer() { return _base_of_stack_pointer; }
  77 
  78   void set_base_of_stack_pointer(intptr_t* base_sp) {
  79     _base_of_stack_pointer = base_sp;
  80   }
  81 
  82   void record_base_of_stack_pointer() {
  83     intptr_t *sp = (intptr_t *)(((intptr_t)StubRoutines::Sparc::flush_callers_register_windows_func()()));
  84     intptr_t *ysp;
  85     while((ysp = (intptr_t*)sp[FP->sp_offset_in_saved_window()]) != NULL) {
  86       sp = (intptr_t *)((intptr_t)ysp + STACK_BIAS);
  87     }
  88     _base_of_stack_pointer = sp;
  89   }
  90 
  91   bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext,
  92     bool isInJava);
  93 
  94   bool pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava);
  95 private:
  96   bool pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava, bool makeWalkable);
  97 public:
  98 
  99   // These routines are only used on cpu architectures that
 100   // have separate register stacks (Itanium).
 101   static bool register_stack_overflow() { return false; }
 102   static void enable_register_stack_guard() {}
 103   static void disable_register_stack_guard() {}
 104 
 105 #endif // OS_CPU_SOLARIS_SPARC_VM_THREAD_SOLARIS_SPARC_HPP