hotspot/src/share/vm/code/pcDesc.cpp
author cfang
Thu, 20 Aug 2009 12:42:57 -0700
changeset 3686 69c1b5228547
parent 1 489c9b5090e2
child 4893 fedc27b54caa
permissions -rw-r--r--
6873116: Modify reexecute implementation to use pcDesc to record the reexecute bit Summary: use PcDesc to keep record of the reexecute bit instead of using DebugInfoStreams Reviewed-by: kvn, never, twisti
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/*
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 * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 *
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 */
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# include "incls/_precompiled.incl"
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# include "incls/_pcDesc.cpp.incl"
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PcDesc::PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset) {
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  assert(sizeof(PcDescFlags) <= 4, "occupies more than a word");
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  _pc_offset           = pc_offset;
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  _scope_decode_offset = scope_decode_offset;
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  _obj_decode_offset   = obj_decode_offset;
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  _flags.word          = 0;
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}
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address PcDesc::real_pc(const nmethod* code) const {
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  return code->instructions_begin() + pc_offset();
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}
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void PcDesc::print(nmethod* code) {
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#ifndef PRODUCT
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  ResourceMark rm;
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  tty->print_cr("PcDesc(pc=0x%lx offset=%x):", real_pc(code), pc_offset());
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  if (scope_decode_offset() == DebugInformationRecorder::serialized_null) {
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    return;
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  }
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  for (ScopeDesc* sd = code->scope_desc_at(real_pc(code));
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       sd != NULL;
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       sd = sd->sender()) {
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    tty->print("  ");
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    sd->method()->print_short_name(tty);
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    tty->print("  @%d", sd->bci());
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    tty->print("  reexecute=%s", sd->should_reexecute()?"true":"false");
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    tty->cr();
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  }
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#endif
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}
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bool PcDesc::verify(nmethod* code) {
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  //Unimplemented();
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  return true;
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}