44 static final int N_TRIES = 5; // number of times to try deflation
45
46 public static void main(String args[]) throws Exception {
47 ProcessBuilder pb = ProcessTools.createTestJvm(
48 "-Xbootclasspath/a:.",
49 "-XX:+UnlockDiagnosticVMOptions",
50 "-XX:+WhiteBoxAPI",
51 "-Xlog:monitorinflation=info",
52 InflateMonitorsTest.class.getName());
53
54 OutputAnalyzer output = new OutputAnalyzer(pb.start());
55 System.out.println(output.getStdout());
56 output.shouldHaveExitValue(0);
57 output.shouldContain("WhiteBox initiated DeflateIdleMonitors");
58 }
59
60 public static class InflateMonitorsTest {
61 static WhiteBox wb = WhiteBox.getWhiteBox();
62 public static Object obj;
63
64 public static void main(String args[]) {
65 obj = new Object();
66 synchronized (obj) {
67 // HotSpot implementation detail: asking for the hash code
68 // when the object is locked causes monitor inflation.
69 if (obj.hashCode() == 0xBAD) System.out.println("!");
70 Asserts.assertEQ(wb.isMonitorInflated(obj), true,
71 "Monitor should be inflated.");
72 }
73 for (int cnt = 1; cnt <= N_TRIES; cnt++) {
74 System.out.println("Deflation try #" + cnt);
75 boolean did_deflation = wb.deflateIdleMonitors();
76 Asserts.assertEQ(did_deflation, true,
77 "deflateIdleMonitors() should have worked.");
78 if (!wb.isMonitorInflated(obj)) {
79 // Deflation worked so no more retries needed.
80 break;
81 }
82 try {
83 System.out.println("Deflation try #" + cnt + " failed. "
84 + "Delaying before retry.");
85 Thread.sleep(N_DELAY);
86 } catch (InterruptedException ie) {
87 }
88 }
89 Asserts.assertEQ(wb.isMonitorInflated(obj), false,
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44 static final int N_TRIES = 5; // number of times to try deflation
45
46 public static void main(String args[]) throws Exception {
47 ProcessBuilder pb = ProcessTools.createTestJvm(
48 "-Xbootclasspath/a:.",
49 "-XX:+UnlockDiagnosticVMOptions",
50 "-XX:+WhiteBoxAPI",
51 "-Xlog:monitorinflation=info",
52 InflateMonitorsTest.class.getName());
53
54 OutputAnalyzer output = new OutputAnalyzer(pb.start());
55 System.out.println(output.getStdout());
56 output.shouldHaveExitValue(0);
57 output.shouldContain("WhiteBox initiated DeflateIdleMonitors");
58 }
59
60 public static class InflateMonitorsTest {
61 static WhiteBox wb = WhiteBox.getWhiteBox();
62 public static Object obj;
63
64 public static void main(String args[]) throws Exception {
65 obj = new Object();
66 synchronized (obj) {
67 // The current implementation of notify-wait requires inflation.
68 obj.wait(1);
69 Asserts.assertEQ(wb.isMonitorInflated(obj), true,
70 "Monitor should be inflated.");
71 }
72 for (int cnt = 1; cnt <= N_TRIES; cnt++) {
73 System.out.println("Deflation try #" + cnt);
74 boolean did_deflation = wb.deflateIdleMonitors();
75 Asserts.assertEQ(did_deflation, true,
76 "deflateIdleMonitors() should have worked.");
77 if (!wb.isMonitorInflated(obj)) {
78 // Deflation worked so no more retries needed.
79 break;
80 }
81 try {
82 System.out.println("Deflation try #" + cnt + " failed. "
83 + "Delaying before retry.");
84 Thread.sleep(N_DELAY);
85 } catch (InterruptedException ie) {
86 }
87 }
88 Asserts.assertEQ(wb.isMonitorInflated(obj), false,
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