rframe.cpp revision 2273:1d1603768966 
1/*
2 * Copyright (c) 1997, 2011, 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 "interpreter/interpreter.hpp"
27#include "oops/oop.inline.hpp"
28#include "oops/symbol.hpp"
29#include "runtime/frame.inline.hpp"
30#include "runtime/rframe.hpp"
31#include "runtime/vframe.hpp"
32#include "runtime/vframe_hp.hpp"
33
34
35static RFrame*const  noCaller    = (RFrame*) 0x1;               // no caller (i.e., initial frame)
36static RFrame*const  noCallerYet = (RFrame*) 0x0;               // caller not yet computed
37
38RFrame::RFrame(frame fr, JavaThread* thread, RFrame*const callee) :
39  _fr(fr), _thread(thread), _callee(callee), _num(callee ? callee->num() + 1 : 0) {
40  _caller = (RFrame*)noCallerYet;
41  _invocations = 0;
42  _distance = 0;
43}
44
45void RFrame::set_distance(int d) {
46  assert(is_compiled() || d >= 0, "should be positive");
47  _distance = d;
48}
49
50InterpretedRFrame::InterpretedRFrame(frame fr, JavaThread* thread, RFrame*const callee)
51: RFrame(fr, thread, callee) {
52  RegisterMap map(thread, false);
53  _vf     = javaVFrame::cast(vframe::new_vframe(&_fr, &map, thread));
54  _method = methodHandle(thread, _vf->method());
55  assert(   _vf->is_interpreted_frame(), "must be interpreted");
56  init();
57}
58
59InterpretedRFrame::InterpretedRFrame(frame fr, JavaThread* thread, methodHandle m)
60: RFrame(fr, thread, NULL) {
61  RegisterMap map(thread, false);
62  _vf     = javaVFrame::cast(vframe::new_vframe(&_fr, &map, thread));
63  _method = m;
64
65  assert(   _vf->is_interpreted_frame(),  "must be interpreted");
66  init();
67}
68
69CompiledRFrame::CompiledRFrame(frame fr, JavaThread* thread, RFrame*const  callee)
70: RFrame(fr, thread, callee) {
71  init();
72}
73
74CompiledRFrame::CompiledRFrame(frame fr, JavaThread* thread)
75: RFrame(fr, thread, NULL) {
76  init();
77}
78
79DeoptimizedRFrame::DeoptimizedRFrame(frame fr, JavaThread* thread, RFrame*const  callee)
80: InterpretedRFrame(fr, thread, callee) {}
81
82RFrame* RFrame::new_RFrame(frame fr, JavaThread* thread, RFrame*const  callee) {
83  RFrame* rf;
84  int dist = callee ? callee->distance() : -1;
85  if (fr.is_interpreted_frame()) {
86    rf = new InterpretedRFrame(fr, thread, callee);
87    dist++;
88  } else if (fr.is_compiled_frame()) {
89    // Even deopted frames look compiled because the deopt
90    // is invisible until it happens.
91    rf = new CompiledRFrame(fr, thread, callee);
92  } else {
93    assert(false, "Unhandled frame type");
94  }
95  rf->set_distance(dist);
96  rf->init();
97  return rf;
98}
99
100RFrame* RFrame::caller() {
101  if (_caller != noCallerYet) return (_caller == noCaller) ? NULL : _caller;    // already computed caller
102
103  // caller not yet computed; do it now
104  if (_fr.is_first_java_frame()) {
105    _caller = (RFrame*)noCaller;
106    return NULL;
107  }
108
109  RegisterMap map(_thread, false);
110  frame sender = _fr.real_sender(&map);
111  if (sender.is_java_frame()) {
112    _caller = new_RFrame(sender, thread(), this);
113    return _caller;
114  }
115
116  // Real caller is not java related
117  _caller = (RFrame*)noCaller;
118  return NULL;
119}
120
121int InterpretedRFrame::cost() const {
122  return _method->code_size();    // fix this
123  //return _method->estimated_inline_cost(_receiverKlass);
124}
125
126int CompiledRFrame::cost() const {
127  nmethod* nm = top_method()->code();
128  if (nm != NULL) {
129    return nm->insts_size();
130  } else {
131    return top_method()->code_size();
132  }
133}
134
135void CompiledRFrame::init() {
136  RegisterMap map(thread(), false);
137  vframe* vf = vframe::new_vframe(&_fr, &map, thread());
138  assert(vf->is_compiled_frame(), "must be compiled");
139  _nm = compiledVFrame::cast(vf)->code();
140  vf = vf->top();
141  _vf = javaVFrame::cast(vf);
142  _method = methodHandle(thread(), CodeCache::find_nmethod(_fr.pc())->method());
143  assert(_method(), "should have found a method");
144#ifndef PRODUCT
145  _invocations = _method->compiled_invocation_count();
146#endif
147}
148
149void InterpretedRFrame::init() {
150  _invocations = _method->invocation_count() + _method->backedge_count();
151}
152
153void RFrame::print(const char* kind) {
154#ifndef PRODUCT
155#ifdef COMPILER2
156  int cnt = top_method()->interpreter_invocation_count();
157#else
158  int cnt = top_method()->invocation_count();
159#endif
160  tty->print("%3d %s ", _num, is_interpreted() ? "I" : "C");
161  top_method()->print_short_name(tty);
162  tty->print_cr(": inv=%5d(%d) cst=%4d", _invocations, cnt, cost());
163#endif
164}
165
166void CompiledRFrame::print() {
167  RFrame::print("comp");
168}
169
170void InterpretedRFrame::print() {
171  RFrame::print("int.");
172}
173
174void DeoptimizedRFrame::print() {
175  RFrame::print("deopt.");
176}
177