Java example source code file (rframe.cpp)

This example Java source code file (rframe.cpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

compiledrframe\:\:compiledrframe, compiledrframe\:\:cost, compiler2, interpretedrframe, interpretedrframe\:\:interpretedrframe, javathread, null, product, registermap, rframe, rframe*const, rframe\:\:caller, rframe\:\:print, rframe\:\:set_distance

The rframe.cpp Java example source code

/*
 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#include "precompiled.hpp"
#include "interpreter/interpreter.hpp"
#include "oops/oop.inline.hpp"
#include "oops/symbol.hpp"
#include "runtime/frame.inline.hpp"
#include "runtime/rframe.hpp"
#include "runtime/vframe.hpp"
#include "runtime/vframe_hp.hpp"


static RFrame*const  noCaller    = (RFrame*) 0x1;               // no caller (i.e., initial frame)
static RFrame*const  noCallerYet = (RFrame*) 0x0;               // caller not yet computed

RFrame::RFrame(frame fr, JavaThread* thread, RFrame*const callee) :
  _fr(fr), _thread(thread), _callee(callee), _num(callee ? callee->num() + 1 : 0) {
  _caller = (RFrame*)noCallerYet;
  _invocations = 0;
  _distance = 0;
}

void RFrame::set_distance(int d) {
  assert(is_compiled() || d >= 0, "should be positive");
  _distance = d;
}

InterpretedRFrame::InterpretedRFrame(frame fr, JavaThread* thread, RFrame*const callee)
: RFrame(fr, thread, callee) {
  RegisterMap map(thread, false);
  _vf     = javaVFrame::cast(vframe::new_vframe(&_fr, &map, thread));
  _method = methodHandle(thread, _vf->method());
  assert(   _vf->is_interpreted_frame(), "must be interpreted");
  init();
}

InterpretedRFrame::InterpretedRFrame(frame fr, JavaThread* thread, methodHandle m)
: RFrame(fr, thread, NULL) {
  RegisterMap map(thread, false);
  _vf     = javaVFrame::cast(vframe::new_vframe(&_fr, &map, thread));
  _method = m;

  assert(   _vf->is_interpreted_frame(),  "must be interpreted");
  init();
}

CompiledRFrame::CompiledRFrame(frame fr, JavaThread* thread, RFrame*const  callee)
: RFrame(fr, thread, callee) {
  init();
}

CompiledRFrame::CompiledRFrame(frame fr, JavaThread* thread)
: RFrame(fr, thread, NULL) {
  init();
}

DeoptimizedRFrame::DeoptimizedRFrame(frame fr, JavaThread* thread, RFrame*const  callee)
: InterpretedRFrame(fr, thread, callee) {}

RFrame* RFrame::new_RFrame(frame fr, JavaThread* thread, RFrame*const  callee) {
  RFrame* rf;
  int dist = callee ? callee->distance() : -1;
  if (fr.is_interpreted_frame()) {
    rf = new InterpretedRFrame(fr, thread, callee);
    dist++;
  } else if (fr.is_compiled_frame()) {
    // Even deopted frames look compiled because the deopt
    // is invisible until it happens.
    rf = new CompiledRFrame(fr, thread, callee);
  } else {
    assert(false, "Unhandled frame type");
  }
  rf->set_distance(dist);
  rf->init();
  return rf;
}

RFrame* RFrame::caller() {
  if (_caller != noCallerYet) return (_caller == noCaller) ? NULL : _caller;    // already computed caller

  // caller not yet computed; do it now
  if (_fr.is_first_java_frame()) {
    _caller = (RFrame*)noCaller;
    return NULL;
  }

  RegisterMap map(_thread, false);
  frame sender = _fr.real_sender(&map);
  if (sender.is_java_frame()) {
    _caller = new_RFrame(sender, thread(), this);
    return _caller;
  }

  // Real caller is not java related
  _caller = (RFrame*)noCaller;
  return NULL;
}

int InterpretedRFrame::cost() const {
  return _method->code_size();    // fix this
  //return _method->estimated_inline_cost(_receiverKlass);
}

int CompiledRFrame::cost() const {
  nmethod* nm = top_method()->code();
  if (nm != NULL) {
    return nm->insts_size();
  } else {
    return top_method()->code_size();
  }
}

void CompiledRFrame::init() {
  RegisterMap map(thread(), false);
  vframe* vf = vframe::new_vframe(&_fr, &map, thread());
  assert(vf->is_compiled_frame(), "must be compiled");
  _nm = compiledVFrame::cast(vf)->code();
  vf = vf->top();
  _vf = javaVFrame::cast(vf);
  _method = methodHandle(thread(), CodeCache::find_nmethod(_fr.pc())->method());
  assert(_method(), "should have found a method");
#ifndef PRODUCT
  _invocations = _method->compiled_invocation_count();
#endif
}

void InterpretedRFrame::init() {
  _invocations = _method->invocation_count() + _method->backedge_count();
}

void RFrame::print(const char* kind) {
#ifndef PRODUCT
#ifdef COMPILER2
  int cnt = top_method()->interpreter_invocation_count();
#else
  int cnt = top_method()->invocation_count();
#endif
  tty->print("%3d %s ", _num, is_interpreted() ? "I" : "C");
  top_method()->print_short_name(tty);
  tty->print_cr(": inv=%5d(%d) cst=%4d", _invocations, cnt, cost());
#endif
}

void CompiledRFrame::print() {
  RFrame::print("comp");
}

void InterpretedRFrame::print() {
  RFrame::print("int.");
}

void DeoptimizedRFrame::print() {
  RFrame::print("deopt.");
}