Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/debugger/posix/AddressDataSource.java @ 11997:cd25d3be91c5
8012144: multiple SIGSEGVs fails on staxf
Summary: Forward port of 7u change to add additional fence() on RMO platforms, with a load_acquire on all platforms
Reviewed-by: dholmes, kvn
author | vladidan |
---|---|
date | Tue, 06 Aug 2013 20:01:40 -0400 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2001, 2004, 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 sun.jvm.hotspot.debugger.posix; import java.io.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.debugger.posix.elf.*; class AddressDataSource implements DataSource { AddressDataSource(Address addr) { this.addr = addr; offset = 0; } public byte readByte() throws IOException { try { byte res = (byte) addr.getCIntegerAt(offset, 1, false); ++offset; return res; } catch (UnmappedAddressException e) { throw (IOException) new IOException("Unmapped address at 0x" + Long.toHexString(e.getAddress())).initCause(e); } catch (DebuggerException e) { throw (IOException) new IOException().initCause(e); } } public short readShort() throws IOException { // NOTE: byte swapping is taken care of at the ELFFileImpl level int b1 = readByte() & 0xFF; int b2 = readByte() & 0xFF; return (short) ((b1 << 8) | b2); } public int readInt() throws IOException { // NOTE: byte swapping is taken care of at the ELFFileImpl level int b1 = ((int) readByte()) & 0xFF; int b2 = ((int) readByte()) & 0xFF; int b3 = ((int) readByte()) & 0xFF; int b4 = ((int) readByte()) & 0xFF; return ((b1 << 24) | (b2 << 16) | (b3 << 8) | b4); } public long readLong() throws IOException { // NOTE: byte swapping is taken care of at the ELFFileImpl level long b1 = ((long) readByte()) & 0xFFL; long b2 = ((long) readByte()) & 0xFFL; long b3 = ((long) readByte()) & 0xFFL; long b4 = ((long) readByte()) & 0xFFL; long b5 = ((long) readByte()) & 0xFFL; long b6 = ((long) readByte()) & 0xFFL; long b7 = ((long) readByte()) & 0xFFL; long b8 = ((long) readByte()) & 0xFFL; return (((((b1 << 24) | (b2 << 16) | (b3 << 8) | b4)) << 32) | ((((b5 << 24) | (b6 << 16) | (b7 << 8) | b8)))); } public int read(byte[] b) throws IOException { for (int i = 0; i < b.length; i++) { b[i] = readByte(); } return b.length; } public void seek(long pos) throws IOException { offset = pos; } public long getFilePointer() throws IOException { return offset; } public void close() throws IOException { } private Address addr; private long offset; }