1 /*

     2  * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright 2012, 2013 SAP AG. All rights reserved.

     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     5  *

     6  * This code is free software; you can redistribute it and/or modify it

     7  * under the terms of the GNU General Public License version 2 only, as

     8  * published by the Free Software Foundation.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * or visit www.oracle.com if you need additional information or have any

    22  * questions.

    23  *

    24  */

    25 

    26 #ifndef OS_CPU_LINUX_PPC_VM_THREAD_LINUX_PPC_HPP

    27 #define OS_CPU_LINUX_PPC_VM_THREAD_LINUX_PPC_HPP

    28 

    29  private:

    30 

    31   void pd_initialize() {

    32     _anchor.clear();

    33     _last_interpreter_fp = NULL;

    34   }

    35 

    36   // The `last' frame is the youngest Java frame on the thread's stack.

    37   frame pd_last_frame() {

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

    39 

    40     intptr_t* sp = last_Java_sp();

    41     address pc = _anchor.last_Java_pc();

    42 

    43     // Last_Java_pc ist not set, if we come here from compiled code.

    44     if (pc == NULL) {

    45       pc = (address) *(sp + 2);

    46     }

    47 

    48     return frame(sp, pc);

    49   }

    50 

    51  public:

    52 

    53   void set_base_of_stack_pointer(intptr_t* base_sp) {}

    54   intptr_t* base_of_stack_pointer() { return NULL; }

    55   void record_base_of_stack_pointer() {}

    56 

    57   // These routines are only used on cpu architectures that

    58   // have separate register stacks (Itanium).

    59   static bool register_stack_overflow() { return false; }

    60   static void enable_register_stack_guard() {}

    61   static void disable_register_stack_guard() {}

    62 

    63   bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava);

    64 

    65  protected:

    66 

    67   // -Xprof support

    68   //

    69   // In order to find the last Java fp from an async profile

    70   // tick, we store the current interpreter fp in the thread.

    71   // This value is only valid while we are in the C++ interpreter

    72   // and profiling.

    73   intptr_t *_last_interpreter_fp;

    74 

    75  public:

    76 

    77   static ByteSize last_interpreter_fp_offset() {

    78     return byte_offset_of(JavaThread, _last_interpreter_fp);

    79   }

    80 

    81   intptr_t* last_interpreter_fp() { return _last_interpreter_fp; }

    82 

    83 #endif // OS_CPU_LINUX_PPC_VM_THREAD_LINUX_PPC_HPP