7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 package sun.hotspot;
26 import java.security.BasicPermission;
27
28 public class WhiteBox {
29
30 @SuppressWarnings("serial")
31 public static class WhiteBoxPermission extends BasicPermission {
32 public WhiteBoxPermission(String s) {
33 super(s);
34 }
35 }
36
37 private WhiteBox() {}
38 private static final WhiteBox instance = new WhiteBox();
39 private static native void registerNatives();
40
41 /**
42 * Returns the singleton WhiteBox instance.
43 *
44 * The returned WhiteBox object should be carefully guarded
45 * by the caller, since it can be used to read and write data
46 * at arbitrary memory addresses. It must never be passed to
50 SecurityManager sm = System.getSecurityManager();
51 if (sm != null) {
52 sm.checkPermission(new WhiteBoxPermission("getInstance"));
53 }
54 return instance;
55 }
56
57 static {
58 registerNatives();
59 }
60
61 // Memory
62 public native long getObjectAddress(Object o);
63 public native int getHeapOopSize();
64
65 // G1
66 public native boolean g1InConcurrentMark();
67 public native boolean g1IsHumongous(Object o);
68 public native long g1NumFreeRegions();
69 public native int g1RegionSize();
70 }
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7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 package sun.hotspot;
26 import java.security.BasicPermission;
27 import sun.hotspot.parser.DiagnosticCommand;
28
29 public class WhiteBox {
30
31 @SuppressWarnings("serial")
32 public static class WhiteBoxPermission extends BasicPermission {
33 public WhiteBoxPermission(String s) {
34 super(s);
35 }
36 }
37
38 private WhiteBox() {}
39 private static final WhiteBox instance = new WhiteBox();
40 private static native void registerNatives();
41
42 /**
43 * Returns the singleton WhiteBox instance.
44 *
45 * The returned WhiteBox object should be carefully guarded
46 * by the caller, since it can be used to read and write data
47 * at arbitrary memory addresses. It must never be passed to
51 SecurityManager sm = System.getSecurityManager();
52 if (sm != null) {
53 sm.checkPermission(new WhiteBoxPermission("getInstance"));
54 }
55 return instance;
56 }
57
58 static {
59 registerNatives();
60 }
61
62 // Memory
63 public native long getObjectAddress(Object o);
64 public native int getHeapOopSize();
65
66 // G1
67 public native boolean g1InConcurrentMark();
68 public native boolean g1IsHumongous(Object o);
69 public native long g1NumFreeRegions();
70 public native int g1RegionSize();
71 public native Object[] parseCommandLine(String commandline, DiagnosticCommand[] args);
72 }
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