1 /*
  2  * Copyright (c) 2008, 2020, 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 CPU_ARM_FRAME_ARM_HPP
 26 #define CPU_ARM_FRAME_ARM_HPP
 27 
 28 #include "runtime/synchronizer.hpp"
 29 
 30  public:
 31   enum {
 32     pc_return_offset                                 =  0,
 33     // All frames
 34     link_offset                                      =  0,
 35     return_addr_offset                               =  1,
 36     // non-interpreter frames
 37     sender_sp_offset                                 =  2,
 38 
 39     // Interpreter frames
 40     interpreter_frame_oop_temp_offset                =  2, // for native calls only
 41 
 42     interpreter_frame_sender_sp_offset               = -1,
 43     // outgoing sp before a call to an invoked method
 44     interpreter_frame_last_sp_offset                 = interpreter_frame_sender_sp_offset - 1,
 45     interpreter_frame_method_offset                  = interpreter_frame_last_sp_offset - 1,
 46     interpreter_frame_mirror_offset                  = interpreter_frame_method_offset - 1,
 47     interpreter_frame_mdp_offset                     = interpreter_frame_mirror_offset - 1,
 48     interpreter_frame_cache_offset                   = interpreter_frame_mdp_offset - 1,
 49     interpreter_frame_locals_offset                  = interpreter_frame_cache_offset - 1,
 50     interpreter_frame_bcp_offset                     = interpreter_frame_locals_offset - 1,
 51     interpreter_frame_initial_sp_offset              = interpreter_frame_bcp_offset - 1,
 52 
 53     interpreter_frame_monitor_block_top_offset       = interpreter_frame_initial_sp_offset,
 54     interpreter_frame_monitor_block_bottom_offset    = interpreter_frame_initial_sp_offset,
 55 
 56     // Entry frames
 57     entry_frame_call_wrapper_offset                  =  0
 58   };
 59 
 60   intptr_t ptr_at(int offset) const {
 61     return *ptr_at_addr(offset);
 62   }
 63 
 64   void ptr_at_put(int offset, intptr_t value) {
 65     *ptr_at_addr(offset) = value;
 66   }
 67 
 68  private:
 69   // an additional field beyond _sp and _pc:
 70   intptr_t* _fp; // frame pointer
 71   // The interpreter and adapters will extend the frame of the caller.
 72   // Since oopMaps are based on the sp of the caller before extension
 73   // we need to know that value. However in order to compute the address
 74   // of the return address we need the real "raw" sp. By convention we
 75   // use sp() to mean "raw" sp and unextended_sp() to mean the caller's
 76   // original sp.
 77 
 78   intptr_t* _unextended_sp;
 79   void adjust_unextended_sp();
 80 
 81   intptr_t* ptr_at_addr(int offset) const {
 82     return (intptr_t*) addr_at(offset);
 83   }
 84 
 85 #ifdef ASSERT
 86   // Used in frame::sender_for_{interpreter,compiled}_frame
 87   static void verify_deopt_original_pc(   CompiledMethod* nm, intptr_t* unextended_sp, bool is_method_handle_return = false);
 88   static void verify_deopt_mh_original_pc(CompiledMethod* nm, intptr_t* unextended_sp) {
 89     verify_deopt_original_pc(nm, unextended_sp, true);
 90   }
 91 #endif
 92 


 93  public:
 94   // Constructors
 95 
 96   frame(intptr_t* sp, intptr_t* fp, address pc);
 97 
 98   frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc);
 99 
100   frame(intptr_t* sp, intptr_t* fp);
101 
102   void init(intptr_t* sp, intptr_t* fp, address pc);
103 
104   // accessors for the instance variables
105   // Note: not necessarily the real 'frame pointer' (see real_fp)
106   intptr_t* fp() const { return _fp; }
107 
108   inline address* sender_pc_addr() const;
109 
110   // expression stack tos if we are nested in a java call
111   intptr_t* interpreter_frame_last_sp() const;
112 



113   // deoptimization support
114   void interpreter_frame_set_last_sp(intptr_t* sp);
115 
116   // helper to update a map with callee-saved FP
117   static void update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr);
118 
119   static jint interpreter_frame_expression_stack_direction() { return -1; }
120 



121 #endif // CPU_ARM_FRAME_ARM_HPP
--- EOF ---