1 /*
2 * Copyright (c) 1997, 2014, 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 "runtime/frame.inline.hpp"
29
30 #ifndef CC_INTERP
31
32 // asm based interpreter deoptimization helpers
33 template<class M> static int extra_locals_helper(M* method) {
34 return (method->max_locals() - method->size_of_parameters()) *
35 Interpreter::stackElementWords;
36 }
37
38 template<class M> int AbstractInterpreter::size_activation(M* method,
39 int temps,
40 int popframe_args,
41 int monitors,
42 int callee_params,
43 int callee_locals,
44 bool is_top_frame) {
45 // Note: This calculation must exactly parallel the frame setup
46 // in AbstractInterpreterGenerator::generate_method_entry.
47
48 // fixed size of an interpreter frame:
49 int extra_locals = extra_locals_helper<M>(method);
50
51 int overhead = frame::sender_sp_offset -
52 frame::interpreter_frame_initial_sp_offset;
53 // Our locals were accounted for by the caller (or last_frame_adjust
54 // on the transistion) Since the callee parameters already account
55 // for the callee's params we only need to account for the extra
56 // locals.
57 int size = overhead +
58 (callee_locals - callee_params)*Interpreter::stackElementWords +
59 monitors * frame::interpreter_frame_monitor_size() +
60 temps* Interpreter::stackElementWords + popframe_args;
61
62 return size;
63 }
64
65 template int AbstractInterpreter::size_activation<Method>(Method* method,
66 int temps,
67 int popframe_args,
68 int monitors,
69 int callee_params,
70 int callee_locals,
71 bool is_top_frame);
72
73 template int AbstractInterpreter::size_activation<ciMethod>(ciMethod* method,
74 int temps,
75 int popframe_args,
76 int monitors,
77 int callee_params,
78 int callee_locals,
79 bool is_top_frame);
80
81 void AbstractInterpreter::layout_activation(Method* method,
82 int tempcount,
83 int popframe_extra_args,
84 int moncount,
85 int caller_actual_parameters,
86 int callee_param_count,
87 int callee_locals,
88 frame* caller,
89 frame* interpreter_frame,
90 bool is_top_frame,
91 bool is_bottom_frame) {
92 // The frame interpreter_frame is guaranteed to be the right size,
93 // as determined by a previous call to the size_activation() method.
94 // It is also guaranteed to be walkable even though it is in a
95 // skeletal state
96
97 int max_locals = method->max_locals() * Interpreter::stackElementWords;
98 int extra_locals = extra_locals_helper<Method>(method);
99
100 #ifdef ASSERT
101 if (!EnableInvokeDynamic)
102 // @@@ FIXME: Should we correct interpreter_frame_sender_sp in the calling sequences?
103 // Probably, since deoptimization doesn't work yet.
104 assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable");
105 assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable(2)");
106 #endif
107
108 interpreter_frame->interpreter_frame_set_method(method);
109 // NOTE the difference in using sender_sp and
110 // interpreter_frame_sender_sp interpreter_frame_sender_sp is
111 // the original sp of the caller (the unextended_sp) and
112 // sender_sp is fp+8/16 (32bit/64bit) XXX
113 intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1;
114
115 #ifdef ASSERT
116 if (caller->is_interpreted_frame()) {
117 assert(locals < caller->fp() + frame::interpreter_frame_initial_sp_offset, "bad placement");
118 }
119 #endif
120
121 interpreter_frame->interpreter_frame_set_locals(locals);
122 BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin();
123 BasicObjectLock* monbot = montop - moncount;
124 interpreter_frame->interpreter_frame_set_monitor_end(monbot);
125
126 // Set last_sp
127 intptr_t* esp = (intptr_t*) monbot -
128 tempcount*Interpreter::stackElementWords -
129 popframe_extra_args;
130 interpreter_frame->interpreter_frame_set_last_sp(esp);
131
132 // All frames but the initial (oldest) interpreter frame we fill in have
133 // a value for sender_sp that allows walking the stack but isn't
134 // truly correct. Correct the value here.
135 if (extra_locals != 0 &&
136 interpreter_frame->sender_sp() ==
137 interpreter_frame->interpreter_frame_sender_sp()) {
138 interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() +
139 extra_locals);
140 }
141 *interpreter_frame->interpreter_frame_cache_addr() =
142 method->constants()->cache();
143 }
144
145 #endif // CC_INTERP