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 * @test TestWriteBarrierClearControl
26 * @summary Clearing control during final graph reshape causes memory barrier to loose dependency on null check
27 * @key gc
28 * @requires vm.gc.Shenandoah
29 * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:-TieredCompilation
30 * -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC
31 * -XX:+UnlockDiagnosticVMOptions -XX:+StressLCM -XX:+StressGCM
32 * TestWriteBarrierClearControl
33 *
34 */
35 public class TestWriteBarrierClearControl {
36
37 int f;
38
39 static void test1(TestWriteBarrierClearControl o) {
40 o.f = 0x42;
41 }
42
43 static TestWriteBarrierClearControl fo = new TestWriteBarrierClearControl();
44
45 static void test2() {
46 TestWriteBarrierClearControl o = fo;
47 o.f = 0x42;
48 }
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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 * @test TestWriteBarrierClearControl
26 * @summary Clearing control during final graph reshape causes memory barrier to loose dependency on null check
27 * @key gc
28 * @requires vm.gc.Shenandoah & !vm.graal.enabled
29 * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:-TieredCompilation
30 * -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC
31 * -XX:+UnlockDiagnosticVMOptions -XX:+StressLCM -XX:+StressGCM
32 * TestWriteBarrierClearControl
33 *
34 */
35 public class TestWriteBarrierClearControl {
36
37 int f;
38
39 static void test1(TestWriteBarrierClearControl o) {
40 o.f = 0x42;
41 }
42
43 static TestWriteBarrierClearControl fo = new TestWriteBarrierClearControl();
44
45 static void test2() {
46 TestWriteBarrierClearControl o = fo;
47 o.f = 0x42;
48 }
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