1 /*
2 * Copyright (c) 2008, 2018, 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_VM_FRAME_ARM_HPP
26 #define CPU_ARM_VM_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. Since sparc already
75 // uses sp() to mean "raw" sp and unextended_sp() to mean the caller's
76 // original sp we use that convention.
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_VM_FRAME_ARM_HPP