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/jdk.internal.misc
29 * java.management
30 * @build jdk.test.lib.*
31 * sun.hotspot.WhiteBox
32 * @build IsMethodCompilableTest
33 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
34 * sun.hotspot.WhiteBox$WhiteBoxPermission
35 * jdk.test.lib.Platform
36 * @run main/othervm/timeout=2400 -Xbootclasspath/a:. -Xmixed -XX:-TieredCompilation -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:PerMethodRecompilationCutoff=3 -XX:-UseCounterDecay -XX:CompileCommand=compileonly,compiler.whitebox.SimpleTestCaseHelper::* IsMethodCompilableTest
37 * @summary testing of WB::isMethodCompilable()
38 * @author igor.ignatyev@oracle.com
39 */
40
41 import jdk.test.lib.Platform;
42 import compiler.whitebox.CompilerWhiteBoxTest;
43
44 public class IsMethodCompilableTest extends CompilerWhiteBoxTest {
45 /**
46 * Value of {@code -XX:PerMethodRecompilationCutoff}
47 */
48 protected static final long PER_METHOD_RECOMPILATION_CUTOFF;
49
50 static {
51 long tmp = Long.parseLong(
52 getVMOption("PerMethodRecompilationCutoff", "400"));
53 if (tmp == -1) {
54 PER_METHOD_RECOMPILATION_CUTOFF = -1 /* Inf */;
55 } else {
56 PER_METHOD_RECOMPILATION_CUTOFF = (0xFFFFFFFFL & tmp);
57 }
58 }
59
60 public static void main(String[] args) throws Exception {
61 CompilerWhiteBoxTest.main(IsMethodCompilableTest::new, args);
62 }
63
64 private IsMethodCompilableTest(TestCase testCase) {
65 super(testCase);
66 // to prevent inlining of #method
67 WHITE_BOX.testSetDontInlineMethod(method, true);
68 }
69
70 /**
71 * Tests {@code WB::isMethodCompilable()} by recompilation of tested method
72 * 'PerMethodRecompilationCutoff' times and checks compilation status. Also
73 * checks that WB::clearMethodState() clears no-compilable flags. Only
74 * applicable to c2 compiled methods.
75 *
76 * @throws Exception if one of the checks fails.
77 */
78 @Override
79 protected void test() throws Exception {
80
81 // Only c2 compilations can be disabled through PerMethodRecompilationCutoff
82 if (!Platform.isServer()) {
83 return;
84 }
85
86 if (skipXcompOSR()) {
87 return;
88 }
89 if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
90 throw new RuntimeException(method + " must be compilable");
91 }
92 System.out.println("PerMethodRecompilationCutoff = "
93 + PER_METHOD_RECOMPILATION_CUTOFF);
94 if (PER_METHOD_RECOMPILATION_CUTOFF == -1) {
95 System.err.println(
96 "Warning: test is not applicable if PerMethodRecompilationCutoff == Inf");
97 return;
98 }
99
100 // deoptimize 'PerMethodRecompilationCutoff' times
101 for (long attempts = 0, successes = 0;
102 (successes < PER_METHOD_RECOMPILATION_CUTOFF) &&
103 (attempts < PER_METHOD_RECOMPILATION_CUTOFF*2) &&
104 isCompilable(COMP_LEVEL_FULL_OPTIMIZATION); attempts++) {
105 if (compileAndDeoptimize() == COMP_LEVEL_FULL_OPTIMIZATION) {
106 successes++;
107 }
108 }
109
110 if (!testCase.isOsr() && !isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
111 // in osr test case count of deopt maybe more than iterations
112 throw new RuntimeException(method + " is not compilable after "
113 + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
114 }
115
116 // Now compile once more
117 compileAndDeoptimize();
118
119 if (isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
120 throw new RuntimeException(method + " is still compilable after "
121 + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
122 }
123 checkNotCompiled();
124 compile();
125 waitBackgroundCompilation();
126 checkNotCompiled(COMP_LEVEL_FULL_OPTIMIZATION);
127
128 // WB.clearMethodState() must reset no-compilable flags
129 WHITE_BOX.clearMethodState(method);
130 if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
131 throw new RuntimeException(method
132 + " is not compilable after clearMethodState()");
133 }
134 compile();
135 checkCompiled();
136 }
137
138 private int compileAndDeoptimize() throws Exception {
139 compile();
140 waitBackgroundCompilation();
141 int compLevel = getCompLevel();
142 deoptimize();
143 return compLevel;
144 }
145 }