1 /*
2 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
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 * @test IsMethodCompilableTest
26 * @bug 8007270 8006683 8007288 8022832
27 * @library /testlibrary /test/lib /
28 * @modules java.base/sun.misc
29 * java.management
30 * @build jdk.test.lib.* sun.hotspot.WhiteBox
31 * @build IsMethodCompilableTest
32 * @run main ClassFileInstaller sun.hotspot.WhiteBox
33 * sun.hotspot.WhiteBox$WhiteBoxPermission
34 * @run main ClassFileInstaller jdk.test.lib.Platform
35 * @run main/othervm/timeout=2400 -Xbootclasspath/a:. -Xmixed -XX:-TieredCompilation -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:PerMethodRecompilationCutoff=3 -XX:CompileCommand=compileonly,compiler.whitebox.SimpleTestCaseHelper::* IsMethodCompilableTest
36 * @summary testing of WB::isMethodCompilable()
37 * @author igor.ignatyev@oracle.com
38 */
39
40 import jdk.test.lib.Platform;
41 import compiler.whitebox.CompilerWhiteBoxTest;
42
43 public class IsMethodCompilableTest extends CompilerWhiteBoxTest {
44 /**
45 * Value of {@code -XX:PerMethodRecompilationCutoff}
46 */
47 protected static final long PER_METHOD_RECOMPILATION_CUTOFF;
48
49 static {
50 long tmp = Long.parseLong(
51 getVMOption("PerMethodRecompilationCutoff", "400"));
52 if (tmp == -1) {
53 PER_METHOD_RECOMPILATION_CUTOFF = -1 /* Inf */;
54 } else {
55 PER_METHOD_RECOMPILATION_CUTOFF = (0xFFFFFFFFL & tmp);
56 }
57 }
58
59 public static void main(String[] args) throws Exception {
60 CompilerWhiteBoxTest.main(IsMethodCompilableTest::new, args);
61 }
62
63 private IsMethodCompilableTest(TestCase testCase) {
64 super(testCase);
65 // to prevent inlining of #method
66 WHITE_BOX.testSetDontInlineMethod(method, true);
67 }
68
69 /**
70 * Tests {@code WB::isMethodCompilable()} by recompilation of tested method
71 * 'PerMethodRecompilationCutoff' times and checks compilation status. Also
72 * checks that WB::clearMethodState() clears no-compilable flags. Only
73 * applicable to c2 compiled methods.
74 *
75 * @throws Exception if one of the checks fails.
76 */
77 @Override
78 protected void test() throws Exception {
79
80 // Only c2 compilations can be disabled through PerMethodRecompilationCutoff
81 if (!Platform.isServer()) {
82 return;
83 }
84
85 if (skipXcompOSR()) {
86 return;
87 }
88 if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
89 throw new RuntimeException(method + " must be compilable");
90 }
91 System.out.println("PerMethodRecompilationCutoff = "
92 + PER_METHOD_RECOMPILATION_CUTOFF);
93 if (PER_METHOD_RECOMPILATION_CUTOFF == -1) {
94 System.err.println(
95 "Warning: test is not applicable if PerMethodRecompilationCutoff == Inf");
96 return;
97 }
98
99 // deoptimize 'PerMethodRecompilationCutoff' times
100 for (long attempts = 0, successes = 0;
101 (successes < PER_METHOD_RECOMPILATION_CUTOFF) &&
102 (attempts < PER_METHOD_RECOMPILATION_CUTOFF*2) &&
103 isCompilable(COMP_LEVEL_FULL_OPTIMIZATION); attempts++) {
104 if (compileAndDeoptimize() == COMP_LEVEL_FULL_OPTIMIZATION) {
105 successes++;
106 }
107 }
108
109 if (!testCase.isOsr() && !isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
110 // in osr test case count of deopt maybe more than iterations
111 throw new RuntimeException(method + " is not compilable after "
112 + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
113 }
114
115 // Now compile once more
116 compileAndDeoptimize();
117
118 if (isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
119 throw new RuntimeException(method + " is still compilable after "
120 + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
121 }
122 checkNotCompiled();
123 compile();
124 waitBackgroundCompilation();
125 checkNotCompiled(COMP_LEVEL_FULL_OPTIMIZATION);
126
127 // WB.clearMethodState() must reset no-compilable flags
128 WHITE_BOX.clearMethodState(method);
129 if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
130 throw new RuntimeException(method
131 + " is not compilable after clearMethodState()");
132 }
133 compile();
134 checkCompiled();
135 }
136
137 private int compileAndDeoptimize() throws Exception {
138 compile();
139 waitBackgroundCompilation();
140 int compLevel = getCompLevel();
141 deoptimize();
142 return compLevel;
143 }
144 }