1 /*
2 * Copyright (c) 1997, 2017, 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 #include "precompiled.hpp"
26 #include "ci/ciMethod.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "oops/klass.inline.hpp"
29 #include "runtime/frame.inline.hpp"
30
31
32 // asm based interpreter deoptimization helpers
33 int AbstractInterpreter::size_activation(int max_stack,
34 int temps,
35 int extra_args,
36 int monitors,
37 int callee_params,
38 int callee_locals,
39 bool is_top_frame) {
40 // Note: This calculation must exactly parallel the frame setup
41 // in TemplateInterpreterGenerator::generate_fixed_frame.
42
43 // fixed size of an interpreter frame:
44 int overhead = frame::sender_sp_offset -
45 frame::interpreter_frame_initial_sp_offset;
46 // Our locals were accounted for by the caller (or last_frame_adjust
47 // on the transistion) Since the callee parameters already account
48 // for the callee's params we only need to account for the extra
49 // locals.
50 int size = overhead +
51 (callee_locals - callee_params)*Interpreter::stackElementWords +
52 monitors * frame::interpreter_frame_monitor_size() +
53 temps* Interpreter::stackElementWords + extra_args;
54
55 return size;
56 }
57
58 void AbstractInterpreter::layout_activation(Method* method,
59 int tempcount,
60 int popframe_extra_args,
61 int moncount,
62 int caller_actual_parameters,
63 int callee_param_count,
64 int callee_locals,
65 frame* caller,
66 frame* interpreter_frame,
67 bool is_top_frame,
68 bool is_bottom_frame) {
69 // The frame interpreter_frame is guaranteed to be the right size,
70 // as determined by a previous call to the size_activation() method.
71 // It is also guaranteed to be walkable even though it is in a
72 // skeletal state
73
74 int max_locals = method->max_locals() * Interpreter::stackElementWords;
75 int extra_locals = (method->max_locals() - method->size_of_parameters()) *
76 Interpreter::stackElementWords;
77
78 #ifdef ASSERT
79 assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable");
80 #endif
81
82 interpreter_frame->interpreter_frame_set_method(method);
83 // NOTE the difference in using sender_sp and
84 // interpreter_frame_sender_sp interpreter_frame_sender_sp is
85 // the original sp of the caller (the unextended_sp) and
86 // sender_sp is fp+8/16 (32bit/64bit) XXX
87 intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1;
88
89 #ifdef ASSERT
90 if (caller->is_interpreted_frame()) {
91 assert(locals < caller->fp() + frame::interpreter_frame_initial_sp_offset, "bad placement");
92 }
93 #endif
94
95 interpreter_frame->interpreter_frame_set_locals(locals);
96 BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin();
97 BasicObjectLock* monbot = montop - moncount;
98 interpreter_frame->interpreter_frame_set_monitor_end(monbot);
99
100 // Set last_sp
101 intptr_t* esp = (intptr_t*) monbot -
102 tempcount*Interpreter::stackElementWords -
103 popframe_extra_args;
104 interpreter_frame->interpreter_frame_set_last_sp(esp);
105
106 // All frames but the initial (oldest) interpreter frame we fill in have
107 // a value for sender_sp that allows walking the stack but isn't
108 // truly correct. Correct the value here.
109 if (extra_locals != 0 &&
110 interpreter_frame->sender_sp() ==
111 interpreter_frame->interpreter_frame_sender_sp()) {
112 interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() +
113 extra_locals);
114 }
115 *interpreter_frame->interpreter_frame_cache_addr() =
116 method->constants()->cache();
117 *interpreter_frame->interpreter_frame_mirror_addr() =
118 method->method_holder()->java_mirror();
119 }
120
121 #ifndef _LP64
122 int AbstractInterpreter::BasicType_as_index(BasicType type) {
123 int i = 0;
124 switch (type) {
125 case T_BOOLEAN: i = 0; break;
126 case T_CHAR : i = 1; break;
127 case T_BYTE : i = 2; break;
128 case T_SHORT : i = 3; break;
129 case T_INT : // fall through
130 case T_LONG : // fall through
131 case T_VOID : i = 4; break;
132 case T_FLOAT : i = 5; break; // have to treat float and double separately for SSE
133 case T_DOUBLE : i = 6; break;
134 case T_OBJECT : // fall through
135 case T_ARRAY : i = 7; break;
136 default : ShouldNotReachHere();
137 }
138 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds");
139 return i;
140 }
141 #else
142 int AbstractInterpreter::BasicType_as_index(BasicType type) {
143 int i = 0;
144 switch (type) {
145 case T_BOOLEAN: i = 0; break;
146 case T_CHAR : i = 1; break;
147 case T_BYTE : i = 2; break;
148 case T_SHORT : i = 3; break;
149 case T_INT : i = 4; break;
150 case T_LONG : i = 5; break;
151 case T_VOID : i = 6; break;
152 case T_FLOAT : i = 7; break;
153 case T_DOUBLE : i = 8; break;
154 case T_OBJECT : i = 9; break;
155 case T_ARRAY : i = 9; break;
156 default : ShouldNotReachHere();
157 }
158 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers,
159 "index out of bounds");
160 return i;
161 }
162 #endif // _LP64
163
164 // How much stack a method activation needs in words.
165 int AbstractInterpreter::size_top_interpreter_activation(Method* method) {
166 const int entry_size = frame::interpreter_frame_monitor_size();
167
168 // total overhead size: entry_size + (saved rbp thru expr stack
169 // bottom). be sure to change this if you add/subtract anything
170 // to/from the overhead area
171 const int overhead_size =
172 -(frame::interpreter_frame_initial_sp_offset) + entry_size;
173
174 #ifndef _LP64
175 const int stub_code = 4; // see generate_call_stub
176 #else
177 const int stub_code = frame::entry_frame_after_call_words;
178 #endif
179
180 const int method_stack = (method->max_locals() + method->max_stack()) *
181 Interpreter::stackElementWords;
182 return (overhead_size + method_stack + stub_code);
183 }