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23 
24 /*
25  * @test OverloadCompileQueueTest
26  * @summary stressing code cache by overloading compile queues
27  * @library /test/lib /
28  * @modules java.base/jdk.internal.misc
29  *          java.management
30  *
31  * @build sun.hotspot.WhiteBox
32  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
33  *                                sun.hotspot.WhiteBox$WhiteBoxPermission
34  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
35  *                   -XX:+WhiteBoxAPI
36  *                   -XX:CompileCommand=dontinline,compiler.codecache.stress.Helper$TestCase::method
37  *                   -XX:-SegmentedCodeCache
38  *                   compiler.codecache.stress.OverloadCompileQueueTest
39  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
40  *                   -XX:+WhiteBoxAPI
41  *                   -XX:CompileCommand=dontinline,compiler.codecache.stress.Helper$TestCase::method
42  *                   -XX:+SegmentedCodeCache
43  *                   compiler.codecache.stress.OverloadCompileQueueTest
44  */
45 
46 package compiler.codecache.stress;
47 
48 import jdk.test.lib.Platform;
49 
50 import java.lang.reflect.Method;
51 import java.util.stream.IntStream;
52 
53 public class OverloadCompileQueueTest implements Runnable {
54     private static final int MAX_SLEEP = 10000;
55     private static final String METHOD_TO_ENQUEUE = "method";
56     private static final int LEVEL_SIMPLE = 1;
57     private static final int LEVEL_FULL_OPTIMIZATION = 4;
58     private static final boolean TIERED_COMPILATION
59             = Helper.WHITE_BOX.getBooleanVMFlag("TieredCompilation");
60     private static final int TIERED_STOP_AT_LEVEL
61             = Helper.WHITE_BOX.getIntxVMFlag("TieredStopAtLevel").intValue();
62     private static final int[] AVAILABLE_LEVELS;
63     static {
64         if (TIERED_COMPILATION) {
65             AVAILABLE_LEVELS = IntStream
66                     .rangeClosed(LEVEL_SIMPLE, TIERED_STOP_AT_LEVEL)
67                     .toArray();
68         } else if (Platform.isServer() && !Platform.isEmulatedClient()) {
69             AVAILABLE_LEVELS = new int[] { LEVEL_FULL_OPTIMIZATION };
70         } else if (Platform.isClient() || Platform.isMinimal() || Platform.isEmulatedClient()) {
71             AVAILABLE_LEVELS = new int[] { LEVEL_SIMPLE };
72         } else {
73             throw new Error("TESTBUG: unknown VM: " + Platform.vmName);
74         }
75     }
76 
main(String[] args)77     public static void main(String[] args) {
78         if (Platform.isInt()) {
79             throw new Error("TESTBUG: test can not be run in interpreter");
80         }
81         new CodeCacheStressRunner(new OverloadCompileQueueTest()).runTest();
82     }
83 
OverloadCompileQueueTest()84     public OverloadCompileQueueTest() {
85         Helper.startInfiniteLoopThread(this::lockUnlock, 100L);
86     }
87 
88     @Override
run()89     public void run() {
90         Helper.TestCase obj = Helper.TestCase.get();
91         Class clazz = obj.getClass();
92         Method mEnqueue;
93         try {
94             mEnqueue = clazz.getMethod(METHOD_TO_ENQUEUE);
95         } catch (NoSuchMethodException | SecurityException e) {
96             throw new Error(String.format(
97                     "TESTBUG: cannot get method '%s' of class %s",
98                     METHOD_TO_ENQUEUE, clazz.getName()), e);
99         }
100         for (int compLevel : AVAILABLE_LEVELS) {
101             Helper.WHITE_BOX.enqueueMethodForCompilation(mEnqueue, compLevel);
102         }
103     }
104 
lockUnlock()105     private void lockUnlock() {
106         try {
107             int sleep = Helper.RNG.nextInt(MAX_SLEEP);
108             Helper.WHITE_BOX.lockCompilation();
109             Thread.sleep(sleep);
110         } catch (InterruptedException e) {
111             throw new Error("TESTBUG: lockUnlocker thread was unexpectedly interrupted", e);
112         } finally {
113             Helper.WHITE_BOX.unlockCompilation();
114         }
115     }
116 
117 }
118