--- a/jdk/src/java.management/share/classes/javax/management/ObjectName.java Wed Aug 19 13:11:24 2015 -0700
+++ b/jdk/src/java.management/share/classes/javax/management/ObjectName.java Thu Aug 20 07:36:37 2015 -0700
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2015, 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
@@ -218,9 +218,19 @@
* <p>The <b>serialVersionUID</b> of this class is <code>1081892073854801359L</code>.
*
* @since 1.5
+ *
+ * @implNote The maximum allowed length of the domain name in this implementation
+ * is {@code Integer.MAX_VALUE/4}
*/
@SuppressWarnings("serial") // don't complain serialVersionUID not constant
public class ObjectName implements Comparable<ObjectName>, QueryExp {
+ private static final int DOMAIN_PATTERN = 0x8000_0000;
+ private static final int PROPLIST_PATTERN = 0x4000_0000;
+ private static final int PROPVAL_PATTERN = 0x2000_0000;
+
+ private static final int FLAG_MASK = DOMAIN_PATTERN | PROPLIST_PATTERN |
+ PROPVAL_PATTERN;
+ private static final int DOMAIN_LENGTH_MASK = ~FLAG_MASK;
/**
* A structure recording property structure and
@@ -365,33 +375,25 @@
/**
- * The length of the domain part of built objectname
- */
- private transient int _domain_length = 0;
-
-
- /**
* The propertyList of built object name. Initialized lazily.
* Table that contains all the pairs (key,value) for this ObjectName.
*/
private transient Map<String,String> _propertyList;
/**
- * boolean that declares if this ObjectName domain part is a pattern
- */
- private transient boolean _domain_pattern = false;
-
- /**
- * boolean that declares if this ObjectName contains a pattern on the
- * key property list
+ * This field encodes _domain_pattern, _property_list_pattern and
+ * _property_value_pattern booleans and _domain_length integer.
+ * <p>
+ * The following masks can be used to extract the value:
+ * <ul>
+ * <li>{@linkplain ObjectName#DOMAIN_PATTERN}</li>
+ * <li>{@linkplain ObjectName#PROPLIST_PATTERN}</li>
+ * <li>{@linkplain ObjectName#PROPVAL_PATTERN}</li>
+ * <li>{@linkplain ObjectName#DOMAIN_LENGTH_MASK}</li>
+ * </ul>
+ * </p>.
*/
- private transient boolean _property_list_pattern = false;
-
- /**
- * boolean that declares if this ObjectName contains a pattern on the
- * value of at least one key property
- */
- private transient boolean _property_value_pattern = false;
+ private transient int _compressed_storage = 0x0;
// Instance private fields <=======================================
@@ -426,11 +428,11 @@
_canonicalName = "*:*";
_kp_array = _Empty_property_array;
_ca_array = _Empty_property_array;
- _domain_length = 1;
+ setDomainLength(1);
_propertyList = null;
- _domain_pattern = true;
- _property_list_pattern = true;
- _property_value_pattern = false;
+ setDomainPattern(true);
+ setPropertyListPattern(true);
+ setPropertyValuePattern(false);
return;
}
@@ -448,7 +450,7 @@
while (index < len) {
switch (name_chars[index]) {
case ':' :
- _domain_length = index++;
+ setDomainLength(index++);
break domain_parsing;
case '=' :
// ":" omission check.
@@ -469,7 +471,7 @@
"Invalid character '\\n' in domain name");
case '*' :
case '?' :
- _domain_pattern = true;
+ setDomainPattern(true);
index++;
break;
default :
@@ -484,6 +486,7 @@
"Key properties cannot be empty");
// we have got the domain part, begins building of _canonicalName
+ int _domain_length = getDomainLength();
System.arraycopy(name_chars, 0, canonical_chars, 0, _domain_length);
canonical_chars[_domain_length] = ':';
cname_index = _domain_length + 1;
@@ -500,20 +503,20 @@
keys = new String[10];
_kp_array = new Property[10];
- _property_list_pattern = false;
- _property_value_pattern = false;
+ setPropertyListPattern(false);
+ setPropertyValuePattern(false);
while (index < len) {
c = name_chars[index];
// case of pattern properties
if (c == '*') {
- if (_property_list_pattern)
+ if (isPropertyListPattern())
throw new MalformedObjectNameException(
"Cannot have several '*' characters in pattern " +
"property list");
else {
- _property_list_pattern = true;
+ setPropertyListPattern(true);
if ((++index < len ) && (name_chars[index] != ','))
throw new MalformedObjectNameException(
"Invalid character found after '*': end of " +
@@ -639,7 +642,7 @@
if (!value_pattern) {
prop = new Property(key_index, key_length, value_length);
} else {
- _property_value_pattern = true;
+ setPropertyValuePattern(true);
prop = new PatternProperty(key_index, key_length, value_length);
}
key_name = name.substring(key_index, key_index + key_length);
@@ -670,7 +673,8 @@
* @exception MalformedObjectNameException The <code>domain</code>
* contains an illegal character, or one of the keys or values in
* <code>table</code> contains an illegal character, or one of the
- * values in <code>table</code> does not follow the rules for quoting.
+ * values in <code>table</code> does not follow the rules for quoting,
+ * or the domain's length exceeds the maximum allowed length.
* @exception NullPointerException One of the parameters is null.
*/
private void construct(String domain, Map<String,String> props)
@@ -696,7 +700,7 @@
// init canonicalname
final StringBuilder sb = new StringBuilder();
sb.append(domain).append(':');
- _domain_length = domain.length();
+ setDomainLength(domain.length());
// allocates the property array
int nb_props = props.size();
@@ -729,7 +733,7 @@
key.length(),
value.length());
} else {
- _property_value_pattern = true;
+ setPropertyValuePattern(true);
prop = new PatternProperty(key_index,
key.length(),
value.length());
@@ -743,10 +747,10 @@
char[] initial_chars = new char[len];
sb.getChars(0, len, initial_chars, 0);
char[] canonical_chars = new char[len];
- System.arraycopy(initial_chars, 0, canonical_chars, 0,
- _domain_length + 1);
+ int copyLen = getDomainLength() + 1;
+ System.arraycopy(initial_chars, 0, canonical_chars, 0, copyLen);
setCanonicalName(initial_chars, canonical_chars, keys, keys_map,
- _domain_length + 1, _kp_array.length);
+ copyLen, _kp_array.length);
}
// Category : Instance construction <==============================
@@ -822,7 +826,7 @@
}
// terminate canonicalname with '*' in case of pattern
- if (_property_list_pattern) {
+ if (isPropertyListPattern()) {
if (_kp_array != _Empty_property_array)
canonical_chars[prop_index++] = ',';
canonical_chars[prop_index++] = '*';
@@ -1051,13 +1055,32 @@
return false;
case '*' :
case '?' :
- _domain_pattern = true;
+ setDomainPattern(true);
break;
}
}
return true;
}
+ private int getDomainLength() {
+ return _compressed_storage & DOMAIN_LENGTH_MASK;
+ }
+
+ /**
+ * Validates and sets the domain length
+ * @param length The domain length
+ * @throws MalformedObjectNameException
+ * When the given domain length exceeds the maximum allowed length
+ */
+ private void setDomainLength(int length) throws MalformedObjectNameException {
+ if ((length & FLAG_MASK) != 0 ) {
+ throw new MalformedObjectNameException(
+ "Domain name too long. Maximum allowed domain name length is:" +
+ DOMAIN_LENGTH_MASK);
+ }
+ _compressed_storage = (_compressed_storage & FLAG_MASK) | length;
+ }
+
// Category : Internal accessors <==============================
// Category : Serialization ----------------------------------->
@@ -1225,12 +1248,12 @@
// Serializes this instance in the old serial form
// Read CR 6441274 before making any changes to this code
ObjectOutputStream.PutField fields = out.putFields();
- fields.put("domain", _canonicalName.substring(0, _domain_length));
+ fields.put("domain", _canonicalName.substring(0, getDomainLength()));
fields.put("propertyList", getKeyPropertyList());
fields.put("propertyListString", getKeyPropertyListString());
fields.put("canonicalName", _canonicalName);
- fields.put("pattern", (_domain_pattern || _property_list_pattern));
- fields.put("propertyPattern", _property_list_pattern);
+ fields.put("pattern", (_compressed_storage & (DOMAIN_PATTERN | PROPLIST_PATTERN)) != 0);
+ fields.put("propertyPattern", isPropertyListPattern());
out.writeFields();
}
else
@@ -1291,7 +1314,8 @@
* @exception MalformedObjectNameException The
* <code>domain</code>, <code>key</code>, or <code>value</code>
* contains an illegal character, or <code>value</code> does not
- * follow the rules for quoting.
+ * follow the rules for quoting, or the domain's length exceeds
+ * the maximum allowed length.
* @exception NullPointerException One of the parameters is null.
*
*/
@@ -1322,7 +1346,7 @@
* contains an illegal character, or one of the keys or values in
* <code>table</code> contains an illegal character, or one of the
* values in <code>table</code> does not follow the rules for
- * quoting.
+ * quoting, or the domain's length exceeds the maximum allowed length.
* @exception NullPointerException One of the parameters is null.
*
*/
@@ -1392,7 +1416,8 @@
* @exception MalformedObjectNameException The
* <code>domain</code>, <code>key</code>, or <code>value</code>
* contains an illegal character, or <code>value</code> does not
- * follow the rules for quoting.
+ * follow the rules for quoting, or the domain's length exceeds
+ * the maximum allowed length.
* @exception NullPointerException One of the parameters is null.
*/
public ObjectName(String domain, String key, String value)
@@ -1417,7 +1442,7 @@
* contains an illegal character, or one of the keys or values in
* <code>table</code> contains an illegal character, or one of the
* values in <code>table</code> does not follow the rules for
- * quoting.
+ * quoting, or the domain's length exceeds the maximum allowed length.
* @exception NullPointerException One of the parameters is null.
*/
public ObjectName(String domain, Hashtable<String,String> table)
@@ -1443,9 +1468,7 @@
* @return True if the name is a pattern, otherwise false.
*/
public boolean isPattern() {
- return (_domain_pattern ||
- _property_list_pattern ||
- _property_value_pattern);
+ return (_compressed_storage & FLAG_MASK) != 0;
}
/**
@@ -1455,7 +1478,20 @@
*
*/
public boolean isDomainPattern() {
- return _domain_pattern;
+ return (_compressed_storage & DOMAIN_PATTERN) != 0;
+ }
+
+ /**
+ * Marks the object name as representing a pattern on the domain part.
+ * @param value {@code true} if the domain name is a pattern,
+ * {@code false} otherwise
+ */
+ private void setDomainPattern(boolean value) {
+ if (value) {
+ _compressed_storage |= DOMAIN_PATTERN;
+ } else {
+ _compressed_storage &= ~DOMAIN_PATTERN;
+ }
}
/**
@@ -1468,7 +1504,7 @@
* @return True if the name is a property pattern, otherwise false.
*/
public boolean isPropertyPattern() {
- return _property_list_pattern || _property_value_pattern;
+ return (_compressed_storage & (PROPVAL_PATTERN | PROPLIST_PATTERN)) != 0;
}
/**
@@ -1482,7 +1518,20 @@
* @since 1.6
*/
public boolean isPropertyListPattern() {
- return _property_list_pattern;
+ return (_compressed_storage & PROPLIST_PATTERN) != 0;
+ }
+
+ /**
+ * Marks the object name as representing a pattern on the key property list.
+ * @param value {@code true} if the key property list is a pattern,
+ * {@code false} otherwise
+ */
+ private void setPropertyListPattern(boolean value) {
+ if (value) {
+ _compressed_storage |= PROPLIST_PATTERN;
+ } else {
+ _compressed_storage &= ~PROPLIST_PATTERN;
+ }
}
/**
@@ -1497,7 +1546,20 @@
* @since 1.6
*/
public boolean isPropertyValuePattern() {
- return _property_value_pattern;
+ return (_compressed_storage & PROPVAL_PATTERN) != 0;
+ }
+
+ /**
+ * Marks the object name as representing a pattern on the value part.
+ * @param value {@code true} if the value part of at least one of the
+ * key properties is a pattern, {@code false} otherwise
+ */
+ private void setPropertyValuePattern(boolean value) {
+ if (value) {
+ _compressed_storage |= PROPVAL_PATTERN;
+ } else {
+ _compressed_storage &= ~PROPVAL_PATTERN;
+ }
}
/**
@@ -1563,7 +1625,7 @@
* @return The domain.
*/
public String getDomain() {
- return _canonicalName.substring(0, _domain_length);
+ return _canonicalName.substring(0, getDomainLength());
}
/**
@@ -1640,8 +1702,8 @@
// the size of the string is the canonical one minus domain
// part and pattern part
- final int total_size = _canonicalName.length() - _domain_length - 1
- - (_property_list_pattern?2:0);
+ final int total_size = _canonicalName.length() - getDomainLength() - 1
+ - (isPropertyListPattern()?2:0);
final char[] dest_chars = new char[total_size];
final char[] value = _canonicalName.toCharArray();
@@ -1665,7 +1727,7 @@
final int total_size = _canonicalName.length();
final char[] dest_chars = new char[total_size];
final char[] value = _canonicalName.toCharArray();
- final int offset = _domain_length+1;
+ final int offset = getDomainLength() + 1;
// copy "domain:" into dest_chars
//
@@ -1675,7 +1737,7 @@
final int end = writeKeyPropertyListString(value,dest_chars,offset);
// Add ",*" if necessary
- if (_property_list_pattern) {
+ if (isPropertyListPattern()) {
if (end == offset) {
// Property list string is empty.
dest_chars[end] = '*';
@@ -1737,8 +1799,8 @@
if (_ca_array.length == 0) return "";
int len = _canonicalName.length();
- if (_property_list_pattern) len -= 2;
- return _canonicalName.substring(_domain_length +1, len);
+ if (isPropertyListPattern()) len -= 2;
+ return _canonicalName.substring(getDomainLength() + 1, len);
}
// Category : Getter methods <===================================
@@ -1944,22 +2006,18 @@
if (name == null) throw new NullPointerException();
- if (name._domain_pattern ||
- name._property_list_pattern ||
- name._property_value_pattern)
+ if (name.isPattern())
return false;
// No pattern
- if (!_domain_pattern &&
- !_property_list_pattern &&
- !_property_value_pattern)
+ if (!isPattern())
return _canonicalName.equals(name._canonicalName);
return matchDomains(name) && matchKeys(name);
}
private final boolean matchDomains(ObjectName name) {
- if (_domain_pattern) {
+ if (isDomainPattern()) {
// wildmatch domains
// This ObjectName is the pattern
// The other ObjectName is the string.
@@ -1972,15 +2030,15 @@
// If key property value pattern but not key property list
// pattern, then the number of key properties must be equal
//
- if (_property_value_pattern &&
- !_property_list_pattern &&
+ if (isPropertyValuePattern() &&
+ !isPropertyListPattern() &&
(name._ca_array.length != _ca_array.length))
return false;
// If key property value pattern or key property list pattern,
// then every property inside pattern should exist in name
//
- if (_property_value_pattern || _property_list_pattern) {
+ if (isPropertyPattern()) {
final Map<String,String> nameProps = name._getKeyPropertyList();
final Property[] props = _ca_array;
final String cn = _canonicalName;
@@ -1996,7 +2054,7 @@
if (v == null) return false;
// If this property is ok (same key, same value), go to next
//
- if (_property_value_pattern && (p instanceof PatternProperty)) {
+ if (isPropertyValuePattern() && (p instanceof PatternProperty)) {
// wildmatch key property values
// p is the property pattern, v is the string
if (Util.wildmatch(v,p.getValueString(cn)))
--- a/jdk/src/jdk.management/linux/native/libmanagement_ext/UnixOperatingSystem.c Wed Aug 19 13:11:24 2015 -0700
+++ b/jdk/src/jdk.management/linux/native/libmanagement_ext/UnixOperatingSystem.c Thu Aug 20 07:36:37 2015 -0700
@@ -77,14 +77,17 @@
static int get_totalticks(int which, ticks *pticks) {
FILE *fh;
uint64_t userTicks, niceTicks, systemTicks, idleTicks;
+ uint64_t iowTicks = 0, irqTicks = 0, sirqTicks= 0;
int n;
if((fh = fopen("/proc/stat", "r")) == NULL) {
return -1;
}
- n = fscanf(fh, "cpu " DEC_64 " " DEC_64 " " DEC_64 " " DEC_64,
- &userTicks, &niceTicks, &systemTicks, &idleTicks);
+ n = fscanf(fh, "cpu " DEC_64 " " DEC_64 " " DEC_64 " " DEC_64 " " DEC_64 " "
+ DEC_64 " " DEC_64,
+ &userTicks, &niceTicks, &systemTicks, &idleTicks,
+ &iowTicks, &irqTicks, &sirqTicks);
// Move to next line
next_line(fh);
@@ -93,24 +96,30 @@
if (which != -1) {
int i;
for (i = 0; i < which; i++) {
- if (fscanf(fh, "cpu%*d " DEC_64 " " DEC_64 " " DEC_64 " " DEC_64, &userTicks, &niceTicks, &systemTicks, &idleTicks) != 4) {
+ if (fscanf(fh, "cpu%*d " DEC_64 " " DEC_64 " " DEC_64 " " DEC_64 " "
+ DEC_64 " " DEC_64 " " DEC_64,
+ &userTicks, &niceTicks, &systemTicks, &idleTicks,
+ &iowTicks, &irqTicks, &sirqTicks) < 4) {
fclose(fh);
return -2;
}
next_line(fh);
}
- n = fscanf(fh, "cpu%*d " DEC_64 " " DEC_64 " " DEC_64 " " DEC_64 "\n",
- &userTicks, &niceTicks, &systemTicks, &idleTicks);
+ n = fscanf(fh, "cpu%*d " DEC_64 " " DEC_64 " " DEC_64 " " DEC_64 " "
+ DEC_64 " " DEC_64 " " DEC_64 "\n",
+ &userTicks, &niceTicks, &systemTicks, &idleTicks,
+ &iowTicks, &irqTicks, &sirqTicks);
}
fclose(fh);
- if (n != 4) {
+ if (n < 4) {
return -2;
}
pticks->used = userTicks + niceTicks;
- pticks->usedKernel = systemTicks;
- pticks->total = userTicks + niceTicks + systemTicks + idleTicks;
+ pticks->usedKernel = systemTicks + irqTicks + sirqTicks;
+ pticks->total = userTicks + niceTicks + systemTicks + idleTicks +
+ iowTicks + irqTicks + sirqTicks;
return 0;
}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/javax/management/ObjectName/CompressedStorageTest.java Thu Aug 20 07:36:37 2015 -0700
@@ -0,0 +1,231 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+
+/*
+ * @test
+ * @bug 8041565
+ * @summary Tests the limits imposed on the domain name part of an
+ * ObjectName instance
+ * @author Jaroslav Bachorik
+ * @modules java.management
+ * @run main CompressedStorageTest
+ */
+
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.function.Consumer;
+import javax.management.MalformedObjectNameException;
+import javax.management.ObjectName;
+
+public class CompressedStorageTest {
+ private static Method setDomainLengthM;
+ private static Field compressedStorageFld;
+
+ private static int DOMAIN_PATTERN;
+ private static int PROPLIST_PATTERN;
+ private static int PROPVAL_PATTERN;
+
+ private static Method setDomainPattern;
+ private static Method setPropertyListPattern;
+ private static Method setPropertyValuePattern;
+
+
+ static {
+ try {
+ Class<?> clz = ObjectName.class;
+ setDomainLengthM = clz.getDeclaredMethod("setDomainLength", int.class);
+ setDomainLengthM.setAccessible(true);
+
+ compressedStorageFld = clz.getDeclaredField("_compressed_storage");
+ compressedStorageFld.setAccessible(true);
+
+ setDomainPattern = clz.getDeclaredMethod("setDomainPattern", boolean.class);
+ setDomainPattern.setAccessible(true);
+ setPropertyListPattern = clz.getDeclaredMethod("setPropertyListPattern", boolean.class);
+ setPropertyListPattern.setAccessible(true);
+ setPropertyValuePattern = clz.getDeclaredMethod("setPropertyValuePattern", boolean.class);
+ setPropertyValuePattern.setAccessible(true);
+
+ DOMAIN_PATTERN = getStaticIntFld("DOMAIN_PATTERN");
+ PROPLIST_PATTERN = getStaticIntFld("PROPLIST_PATTERN");
+ PROPVAL_PATTERN = getStaticIntFld("PROPVAL_PATTERN");
+
+ } catch (Exception e) {
+ throw new Error(e);
+ }
+ }
+
+ public static void main(String[] args) throws Exception {
+ testZeroLength();
+ testNegativeLength();
+ testMaxLength();
+
+ testSetDomainPattern();
+ testSetPropertyListPattern();
+ testSetPropertyValuePattern();
+ }
+
+ private static ObjectName getObjectName()
+ throws MalformedObjectNameException {
+ return new ObjectName("domain", "key", "value");
+ }
+
+ /**
+ * Test for accepting 0 being passed as argument to
+ * {@linkplain ObjectName#setDomainLength(int)}.
+ *
+ */
+ private static void testZeroLength() throws Exception {
+ setDomainNameLength(0);
+ }
+
+ /**
+ * Test for rejecting negative value being passed as argument to
+ * {@linkplain ObjectName#setDomainLength(int)}.
+ */
+ private static void testNegativeLength() throws Exception {
+ try {
+ setDomainNameLength(-1);
+ } catch (MalformedObjectNameException e) {
+ return;
+ }
+ fail("Allowing negative domain name length");
+ }
+
+ /**
+ * Test for rejecting value exceeding the maximum allowed length
+ * being passed as argument to {@linkplain ObjectName#setDomainLength(int)}.
+ */
+ private static void testMaxLength() throws Exception {
+ try {
+ setDomainNameLength(Integer.MAX_VALUE / 4 + 1);
+ } catch (MalformedObjectNameException e) {
+ return;
+ }
+ fail("Maximum domain name length is not respected");
+ }
+
+ /**
+ * Tests that calling {@linkplain ObjectName#setDomainPattern(boolean)}
+ * results in setting correct bits in {@linkplain ObjectName#_compressed_storage}.
+ */
+ private static void testSetDomainPattern() throws Exception {
+ ObjectName on = getObjectName();
+
+ checkMask(DOMAIN_PATTERN, setDomainPattern, on);
+ }
+
+ /**
+ * Tests that calling {@linkplain ObjectName#setPropertyListPattern(boolean)}
+ * results in setting correct bits in {@linkplain ObjectName#_compressed_storage}.
+ */
+ private static void testSetPropertyListPattern() throws Exception {
+ ObjectName on = getObjectName();
+
+ checkMask(PROPLIST_PATTERN, setPropertyListPattern, on);
+ }
+
+ /**
+ * Tests that calling {@linkplain ObjectName#setPropertyValuePattern(boolean)}
+ * results in setting correct bits in {@linkplain ObjectName#_compressed_storage}.
+ */
+ private static void testSetPropertyValuePattern() throws Exception {
+ ObjectName on = getObjectName();
+
+ checkMask(PROPVAL_PATTERN, setPropertyValuePattern, on);
+ }
+
+ /**
+ * Helper method to call {@linkplain ObjectName#setDomainLength(int)}
+ * method via reflection.
+ * @param len The domain name length
+ * @throws MalformedObjectNameException Propagated from
+ * {@linkplain ObjectName#setDomainLength(int)} invocation.
+ */
+ private static void setDomainNameLength(int len)
+ throws MalformedObjectNameException {
+ try {
+ setDomainLengthM.invoke(getObjectName(), len);
+ } catch (InvocationTargetException e) {
+ Throwable cause = e.getCause();
+ if (cause instanceof MalformedObjectNameException) {
+ throw (MalformedObjectNameException)cause;
+ }
+ throw new Error(cause);
+ } catch (IllegalAccessException | IllegalArgumentException e) {
+ throw new Error(e);
+ }
+ }
+
+ /**
+ * Helper method to assert that a particular boolean setter affects only
+ * a particular bit in the {@linkplain ObjectName#_compressed_storage} field.
+ * @param mask bitmask for storing the boolean value
+ * @param setter setter method reference
+ * @param on {@linkplain ObjectName} instance
+ */
+ private static void checkMask(int mask, Method setter, ObjectName on)
+ throws Exception {
+ int valBefore = compressedStorageFld.getInt(on);
+ setter.invoke(on, true);
+ int valAfter = compressedStorageFld.getInt(on);
+
+ checkMask(mask, valAfter ^ valBefore);
+
+ valBefore = valAfter;
+ setter.invoke(on, false);
+ valAfter = compressedStorageFld.getInt(on);
+
+ checkMask(mask, valAfter ^ valBefore);
+ }
+
+ /**
+ * Compare the changed bits with the given mask.
+ * @param mask bitmask
+ * @param val the changed bits; may be 0 if there was no change
+ */
+ private static void checkMask(int mask, int val) {
+ if (val != 0 && val != mask) {
+ fail("Invalid mask: expecting '" +
+ Integer.toBinaryString(mask) + "' , received '" +
+ Integer.toBinaryString(val) + "'");
+ }
+ }
+
+ /**
+ * Helper method to obtain the value of a static field via reflection.
+ * @param name static field name
+ * @return static field value
+ */
+ private static int getStaticIntFld(String name) throws Exception {
+ Field fld = ObjectName.class.getDeclaredField(name);
+ fld.setAccessible(true);
+
+ return fld.getInt(null);
+ }
+
+ private static void fail(String msg) {
+ throw new Error(msg);
+ }
+}