1/*
2 * Copyright (c) 1997, 2016, 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 "code/codeCache.hpp"
27#include "interpreter/interpreter.hpp"
28#include "oops/oop.inline.hpp"
29#include "oops/symbol.hpp"
30#include "runtime/frame.inline.hpp"
31#include "runtime/rframe.hpp"
32#include "runtime/vframe.hpp"
33#include "runtime/vframe_hp.hpp"
34
35
36static RFrame*const  noCaller    = (RFrame*) 0x1;               // no caller (i.e., initial frame)
37static RFrame*const  noCallerYet = (RFrame*) 0x0;               // caller not yet computed
38
39RFrame::RFrame(frame fr, JavaThread* thread, RFrame*const callee) :
40  _fr(fr), _thread(thread), _callee(callee), _num(callee ? callee->num() + 1 : 0) {
41  _caller = (RFrame*)noCallerYet;
42  _invocations = 0;
43  _distance = 0;
44}
45
46void RFrame::set_distance(int d) {
47  assert(is_compiled() || d >= 0, "should be positive");
48  _distance = d;
49}
50
51InterpretedRFrame::InterpretedRFrame(frame fr, JavaThread* thread, RFrame*const callee)
52: RFrame(fr, thread, callee) {
53  RegisterMap map(thread, false);
54  _vf     = javaVFrame::cast(vframe::new_vframe(&_fr, &map, thread));
55  _method = _vf->method();
56  assert(   _vf->is_interpreted_frame(), "must be interpreted");
57  init();
58}
59
60InterpretedRFrame::InterpretedRFrame(frame fr, JavaThread* thread, Method* m)
61: RFrame(fr, thread, NULL) {
62  RegisterMap map(thread, false);
63  _vf     = javaVFrame::cast(vframe::new_vframe(&_fr, &map, thread));
64  _method = m;
65
66  assert(   _vf->is_interpreted_frame(),  "must be interpreted");
67  init();
68}
69
70CompiledRFrame::CompiledRFrame(frame fr, JavaThread* thread, RFrame*const  callee)
71: RFrame(fr, thread, callee) {
72  init();
73}
74
75CompiledRFrame::CompiledRFrame(frame fr, JavaThread* thread)
76: RFrame(fr, thread, NULL) {
77  init();
78}
79
80DeoptimizedRFrame::DeoptimizedRFrame(frame fr, JavaThread* thread, RFrame*const  callee)
81: InterpretedRFrame(fr, thread, callee) {}
82
83RFrame* RFrame::new_RFrame(frame fr, JavaThread* thread, RFrame*const  callee) {
84  RFrame* rf = NULL;
85  int dist = callee ? callee->distance() : -1;
86  if (fr.is_interpreted_frame()) {
87    rf = new InterpretedRFrame(fr, thread, callee);
88    dist++;
89  } else if (fr.is_compiled_frame()) {
90    // Even deopted frames look compiled because the deopt
91    // is invisible until it happens.
92    rf = new CompiledRFrame(fr, thread, callee);
93  } else {
94    assert(false, "Unhandled frame type");
95  }
96  if (rf != NULL) {
97    rf->set_distance(dist);
98    rf->init();
99  }
100  return rf;
101}
102
103RFrame* RFrame::caller() {
104  if (_caller != noCallerYet) return (_caller == noCaller) ? NULL : _caller;    // already computed caller
105
106  // caller not yet computed; do it now
107  if (_fr.is_first_java_frame()) {
108    _caller = (RFrame*)noCaller;
109    return NULL;
110  }
111
112  RegisterMap map(_thread, false);
113  frame sender = _fr.real_sender(&map);
114  if (sender.is_java_frame()) {
115    _caller = new_RFrame(sender, thread(), this);
116    return _caller;
117  }
118
119  // Real caller is not java related
120  _caller = (RFrame*)noCaller;
121  return NULL;
122}
123
124int InterpretedRFrame::cost() const {
125  return _method->code_size();    // fix this
126  //return _method->estimated_inline_cost(_receiverKlass);
127}
128
129int CompiledRFrame::cost() const {
130  CompiledMethod* nm = top_method()->code();
131  if (nm != NULL) {
132    return nm->insts_size();
133  } else {
134    return top_method()->code_size();
135  }
136}
137
138void CompiledRFrame::init() {
139  RegisterMap map(thread(), false);
140  vframe* vf = vframe::new_vframe(&_fr, &map, thread());
141  assert(vf->is_compiled_frame(), "must be compiled");
142  _nm = compiledVFrame::cast(vf)->code()->as_nmethod();
143  vf = vf->top();
144  _vf = javaVFrame::cast(vf);
145  _method = CodeCache::find_nmethod(_fr.pc())->method();
146  assert(_method, "should have found a method");
147#ifndef PRODUCT
148  _invocations = _method->compiled_invocation_count();
149#endif
150}
151
152void InterpretedRFrame::init() {
153  _invocations = _method->invocation_count() + _method->backedge_count();
154}
155
156void RFrame::print(const char* kind) {
157#ifndef PRODUCT
158#if defined(COMPILER2) || INCLUDE_JVMCI
159  int cnt = top_method()->interpreter_invocation_count();
160#else
161  int cnt = top_method()->invocation_count();
162#endif
163  tty->print("%3d %s ", _num, is_interpreted() ? "I" : "C");
164  top_method()->print_short_name(tty);
165  tty->print_cr(": inv=%5d(%d) cst=%4d", _invocations, cnt, cost());
166#endif
167}
168
169void CompiledRFrame::print() {
170  RFrame::print("comp");
171}
172
173void InterpretedRFrame::print() {
174  RFrame::print("int.");
175}
176
177void DeoptimizedRFrame::print() {
178  RFrame::print("deopt.");
179}
180