hotspot/src/share/vm/ci/ciExceptionHandler.cpp
author twisti
Tue, 05 Jan 2010 15:21:25 +0100
changeset 4567 7fc02fbe5c7a
parent 1 489c9b5090e2
child 5547 f4b087cbb361
permissions -rw-r--r--
6893268: additional dynamic language related optimizations in C2 Summary: C2 needs some additional optimizations to be able to handle MethodHandle invokes and invokedynamic instructions at the best performance. Reviewed-by: kvn, never
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/*
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 * Copyright 1999-2009 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/_ciExceptionHandler.cpp.incl"
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// ciExceptionHandler
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//
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// This class represents an exception handler for a method.
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// ------------------------------------------------------------------
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// ciExceptionHandler::catch_klass
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//
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// Get the exception klass that this handler catches.
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ciInstanceKlass* ciExceptionHandler::catch_klass() {
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  VM_ENTRY_MARK;
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  assert(!is_catch_all(), "bad index");
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  if (_catch_klass == NULL) {
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    bool will_link;
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    assert(_loading_klass->get_instanceKlass()->is_linked(), "must be linked before accessing constant pool");
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    constantPoolHandle cpool(_loading_klass->get_instanceKlass()->constants());
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    ciKlass* k = CURRENT_ENV->get_klass_by_index(cpool,
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                                                 _catch_klass_index,
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                                                 will_link,
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                                                 _loading_klass);
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    if (!will_link && k->is_loaded()) {
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      GUARDED_VM_ENTRY(
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        k = CURRENT_ENV->get_unloaded_klass(_loading_klass, k->name());
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      )
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    }
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    _catch_klass = k->as_instance_klass();
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  }
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  return _catch_klass;
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}
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// ------------------------------------------------------------------
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// ciExceptionHandler::print()
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void ciExceptionHandler::print() {
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  tty->print("<ciExceptionHandler start=%d limit=%d"
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             " handler_bci=%d ex_klass_index=%d",
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             start(), limit(), handler_bci(), catch_klass_index());
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  if (_catch_klass != NULL) {
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    tty->print(" ex_klass=");
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    _catch_klass->print();
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  }
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  tty->print(">");
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}