1 /*
2 * Copyright (c) 2008, 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 "asm/assembler.hpp"
27 #include "interpreter/bytecode.hpp"
28 #include "interpreter/interpreter.hpp"
29 #include "oops/constMethod.hpp"
30 #include "oops/method.hpp"
31 #include "prims/methodHandles.hpp"
32 #include "runtime/handles.inline.hpp"
33 #include "runtime/frame.inline.hpp"
34 #include "runtime/synchronizer.hpp"
35 #include "utilities/align.hpp"
36 #include "utilities/macros.hpp"
37
38 int AbstractInterpreter::BasicType_as_index(BasicType type) {
39 int i = 0;
40 switch (type) {
41 case T_VOID : i = 0; break;
42 case T_BOOLEAN: i = 1; break;
43 case T_CHAR : i = 2; break;
44 case T_BYTE : i = 3; break;
45 case T_SHORT : i = 4; break;
46 case T_INT : i = 5; break;
47 case T_OBJECT : // fall through
48 case T_ARRAY : i = 6; break;
49 case T_LONG : i = 7; break;
50 case T_FLOAT : i = 8; break;
51 case T_DOUBLE : i = 9; break;
52 default : ShouldNotReachHere();
53 }
54 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds");
55 return i;
56 }
57
58 // How much stack a method activation needs in words.
59 int AbstractInterpreter::size_top_interpreter_activation(Method* method) {
60 const int stub_code = 12; // see generate_call_stub
61 // Save space for one monitor to get into the interpreted method in case
62 // the method is synchronized
63 int monitor_size = method->is_synchronized() ?
64 1*frame::interpreter_frame_monitor_size() : 0;
65
66 // total overhead size: monitor_size + (sender SP, thru expr stack bottom).
67 // be sure to change this if you add/subtract anything to/from the overhead area
68 const int overhead_size = monitor_size +
69 (frame::sender_sp_offset - frame::interpreter_frame_initial_sp_offset);
70 const int method_stack = (method->max_locals() + method->max_stack()) *
71 Interpreter::stackElementWords;
72 return overhead_size + method_stack + stub_code;
73 }
74
75 // asm based interpreter deoptimization helpers
76 int AbstractInterpreter::size_activation(int max_stack,
77 int tempcount,
78 int extra_args,
79 int moncount,
80 int callee_param_count,
81 int callee_locals,
82 bool is_top_frame) {
83 // Note: This calculation must exactly parallel the frame setup
84 // in TemplateInterpreterGenerator::generate_fixed_frame.
85 // fixed size of an interpreter frame:
86 int overhead = frame::sender_sp_offset - frame::interpreter_frame_initial_sp_offset;
87
88 // Our locals were accounted for by the caller (or last_frame_adjust on the transistion)
89 // Since the callee parameters already account for the callee's params we only need to account for
90 // the extra locals.
91
92 int size = overhead +
93 ((callee_locals - callee_param_count)*Interpreter::stackElementWords) +
94 (moncount*frame::interpreter_frame_monitor_size()) +
95 tempcount*Interpreter::stackElementWords + extra_args;
96
97
98 return size;
99 }
100
101 void AbstractInterpreter::layout_activation(Method* method,
102 int tempcount,
103 int popframe_extra_args,
104 int moncount,
105 int caller_actual_parameters,
106 int callee_param_count,
107 int callee_locals,
108 frame* caller,
109 frame* interpreter_frame,
110 bool is_top_frame,
111 bool is_bottom_frame) {
112
113 // Set up the method, locals, and monitors.
114 // The frame interpreter_frame is guaranteed to be the right size,
115 // as determined by a previous call to the size_activation() method.
116 // It is also guaranteed to be walkable even though it is in a skeletal state
117 // NOTE: return size is in words not bytes
118
119 // fixed size of an interpreter frame:
120 int max_locals = method->max_locals() * Interpreter::stackElementWords;
121 int extra_locals = (method->max_locals() - method->size_of_parameters()) * Interpreter::stackElementWords;
122
123 #ifdef ASSERT
124 assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable");
125 #endif
126
127 interpreter_frame->interpreter_frame_set_method(method);
128 // NOTE the difference in using sender_sp and interpreter_frame_sender_sp
129 // interpreter_frame_sender_sp is the original sp of the caller (the unextended_sp)
130 // and sender_sp is (fp + sender_sp_offset*wordSize)
131
132 intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1;
133
134 interpreter_frame->interpreter_frame_set_locals(locals);
135 BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin();
136 BasicObjectLock* monbot = montop - moncount;
137 interpreter_frame->interpreter_frame_set_monitor_end(monbot);
138
139 // Set last_sp
140 intptr_t* stack_top = (intptr_t*) monbot -
141 tempcount*Interpreter::stackElementWords -
142 popframe_extra_args;
143 interpreter_frame->interpreter_frame_set_last_sp(stack_top);
144
145 // All frames but the initial (oldest) interpreter frame we fill in have a
146 // value for sender_sp that allows walking the stack but isn't
147 // truly correct. Correct the value here.
148
149 if (extra_locals != 0 &&
150 interpreter_frame->sender_sp() == interpreter_frame->interpreter_frame_sender_sp() ) {
151 interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() + extra_locals);
152 }
153
154 *interpreter_frame->interpreter_frame_cache_addr() =
155 method->constants()->cache();
156 *interpreter_frame->interpreter_frame_mirror_addr() =
157 method->method_holder()->java_mirror();
158 }