Mercurial > hg > graal-compiler
view visualizer/View/src/com/sun/hotspot/igv/view/widgets/OutputSlotWidget.java @ 11825:463f51256c86
AMD64HotSpot: emit jump to IC miss handler directly instead of emitting it inside verfied_entry
for empty methods we emitted something like this if a inline cache is needed:
prefix:
00: < IC check >
...
0b: jne <ic_miss_call>
11: nop
...
verified_entry:
20: ret
ic_miss_call:
21: jmp <entry of runtime function>
when a method is deoptimized, HotSpot patches the verified_entry (0x20) with a
jump to a stub that handles call-sites that has been made non-entrant. since this jump
is 5 bytes long, it will overwrite ic_miss_call and blow up every caller that
calls this method via the unverified entry (prefix).
the fix is to emit the jump to the runtime function inside the unverfied entry:
prefix:
00: < IC check >
...
0b: je <verified_entry>
11: jeq <entry of runtime function>
16: nop
...
verified_entry:
20: ret
author | Bernhard Urban <bernhard.urban@jku.at> |
---|---|
date | Mon, 30 Sep 2013 09:32:18 +0200 |
parents | 015fb895586b |
children |
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/* * Copyright (c) 2008, 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. * */ package com.sun.hotspot.igv.view.widgets; import com.sun.hotspot.igv.graph.Figure; import com.sun.hotspot.igv.graph.OutputSlot; import com.sun.hotspot.igv.view.scene.DiagramScene; import java.awt.Point; import java.util.List; import org.netbeans.api.visual.widget.Widget; /** * * @author Thomas Wuerthinger */ public class OutputSlotWidget extends SlotWidget { private OutputSlot outputSlot; public OutputSlotWidget(OutputSlot slot, DiagramScene scene, Widget parent, FigureWidget fw) { super(slot, scene, parent, fw); outputSlot = slot; //init(); //getFigureWidget().getRightWidget().addChild(this); Point p = outputSlot.getRelativePosition(); p.y += getSlot().getFigure().getHeight() - Figure.SLOT_START; p.x -= this.calculateClientArea().width / 2; //p.x += this.calculateClientArea().width / 2; this.setPreferredLocation(p); } public OutputSlot getOutputSlot() { return outputSlot; } @Override protected int calculateSlotWidth() { List<OutputSlot> slots = getSlot().getFigure().getOutputSlots(); assert slots.contains(getSlot()); return calculateWidth(slots.size()); } /* protected Point calculateRelativeLocation() { if (getFigureWidget().getBounds() == null) { return new Point(0, 0); } double x = this.getFigureWidget().getBounds().width; List<OutputSlot> slots = outputSlot.getFigure().getOutputSlots(); assert slots.contains(outputSlot); return new Point((int) x, (int) (calculateRelativeY(slots.size(), slots.indexOf(outputSlot)))); }*/ }