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/*
* Copyright (c) 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
* Sun gratefully acknowledges that this software was originally authored
* and developed by Kenneth Bradley Russell and Christopher John Kline.
*/
package com.sun.gluegen.runtime;
import java.security.*;
// Debugging only
import java.io.*;
/** Helper class containing constants and methods to assist with the
manipulation of auto-generated ProcAddressTables. */
public class ProcAddressHelper {
public static final String PROCADDRESS_VAR_PREFIX = "_addressof_";
protected static boolean DEBUG;
protected static String DEBUG_PREFIX;
protected static int debugNum;
static {
AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
DEBUG = (System.getProperty("gluegen.debug.ProcAddressHelper") != null);
if (DEBUG) {
DEBUG_PREFIX = System.getProperty("gluegen.debug.ProcAddressHelper.prefix");
}
return null;
}
});
}
protected static PrintStream getDebugOutStream() {
PrintStream out = null;
if (DEBUG) {
if (DEBUG_PREFIX != null) {
try {
out = new PrintStream(new BufferedOutputStream(new FileOutputStream(DEBUG_PREFIX + File.separatorChar +
"procaddresshelper-" + (++debugNum) + ".txt")));
} catch (IOException e) {
e.printStackTrace();
out = System.err;
}
} else {
out = System.err;
}
}
return out;
}
public static void resetProcAddressTable(Object table,
DynamicLookupHelper lookup) throws RuntimeException {
Class tableClass = table.getClass();
java.lang.reflect.Field[] fields = tableClass.getFields();
PrintStream dout = getDebugOutStream();
if (DEBUG) {
dout.println("ProcAddressHelper.resetProcAddressTable(" + table.getClass().getName() + ")");
}
for (int i = 0; i < fields.length; ++i) {
String addressFieldName = fields[i].getName();
if (!addressFieldName.startsWith(ProcAddressHelper.PROCADDRESS_VAR_PREFIX)) {
// not a proc address variable
continue;
}
int startOfMethodName = ProcAddressHelper.PROCADDRESS_VAR_PREFIX.length();
String funcName = addressFieldName.substring(startOfMethodName);
try {
java.lang.reflect.Field addressField = fields[i];
assert(addressField.getType() == Long.TYPE);
long newProcAddress = lookup.dynamicLookupFunction(funcName);
// set the current value of the proc address variable in the table object
addressField.setLong(table, newProcAddress);
if (DEBUG) {
dout.println(" " + addressField.getName() + " = 0x" + Long.toHexString(newProcAddress));
}
} catch (Exception e) {
throw new RuntimeException("Can not get proc address for method \"" +
funcName + "\": Couldn't set value of field \"" + addressFieldName +
"\" in class " + tableClass.getName(), e);
}
}
if (DEBUG) {
dout.flush();
if (DEBUG_PREFIX != null) {
dout.close();
}
}
}
}
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