Mercurial > hg > graal-compiler
view agent/src/share/classes/sun/jvm/hotspot/oops/CompressedLineNumberReadStream.java @ 218:a5838065ab24
6620329: jstack prints double native methods on Solaris/sparc
Summary: Fixed stack walking code in sparc to start frame walk from last_java_sp.
Reviewed-by: sgoldman
author | swamyv |
---|---|
date | Tue, 24 Jun 2008 21:37:10 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 2001-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ package sun.jvm.hotspot.oops; import sun.jvm.hotspot.code.*; import sun.jvm.hotspot.debugger.*; public class CompressedLineNumberReadStream extends CompressedReadStream { /** Equivalent to CompressedLineNumberReadStream(buffer, 0) */ public CompressedLineNumberReadStream(Address buffer) { this(buffer, 0); } public CompressedLineNumberReadStream(Address buffer, int position) { super(buffer, position); } /** Read (bci, line number) pair from stream. Returns false at end-of-stream. */ public boolean readPair() { int next = readByte() & 0xFF; // Check for terminator if (next == 0) return false; if (next == 0xFF) { // Escape character, regular compression used bci += readSignedInt(); line += readSignedInt(); } else { // Single byte compression used bci += next >> 3; line += next & 0x7; } return true; } public int bci() { return bci; } public int line() { return line; } //-------------------------------------------------------------------------------- // Internals only below this point // private int bci; private int line; }