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 * @summary testing of WB::isMethodCompilable()
28 * @library /testlibrary /test/lib /
29 * @modules java.base/jdk.internal.misc
30 * java.management
31 * @build jdk.test.lib.*
32 * sun.hotspot.WhiteBox
33 * @build compiler.whitebox.IsMethodCompilableTest
34 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
35 * sun.hotspot.WhiteBox$WhiteBoxPermission
36 * jdk.test.lib.Platform
37 * @run main/othervm/timeout=2400 -XX:-TieredCompilation -Xmixed
38 * -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
39 * -XX:PerMethodRecompilationCutoff=3 -XX:-UseCounterDecay
40 * -XX:CompileCommand=compileonly,compiler.whitebox.SimpleTestCaseHelper::*
41 * compiler.whitebox.IsMethodCompilableTest
42 */
43
44 package compiler.whitebox;
45
46 import jdk.test.lib.Platform;
47
48 public class IsMethodCompilableTest extends CompilerWhiteBoxTest {
49 /**
50 * Value of {@code -XX:PerMethodRecompilationCutoff}
51 */
52 protected static final long PER_METHOD_RECOMPILATION_CUTOFF;
53
54 static {
55 long tmp = Long.parseLong(
56 getVMOption("PerMethodRecompilationCutoff", "400"));
57 if (tmp == -1) {
58 PER_METHOD_RECOMPILATION_CUTOFF = -1 /* Inf */;
59 } else {
60 PER_METHOD_RECOMPILATION_CUTOFF = (0xFFFFFFFFL & tmp);
61 }
62 }
63
64 public static void main(String[] args) throws Exception {
65 CompilerWhiteBoxTest.main(IsMethodCompilableTest::new, args);
66 }
67
68 private IsMethodCompilableTest(TestCase testCase) {
69 super(testCase);
70 // to prevent inlining of #method
71 WHITE_BOX.testSetDontInlineMethod(method, true);
72 }
73
74 /**
75 * Tests {@code WB::isMethodCompilable()} by recompilation of tested method
76 * 'PerMethodRecompilationCutoff' times and checks compilation status. Also
77 * checks that WB::clearMethodState() clears no-compilable flags. Only
78 * applicable to c2 compiled methods.
79 *
80 * @throws Exception if one of the checks fails.
81 */
82 @Override
83 protected void test() throws Exception {
84
85 // Only c2 compilations can be disabled through PerMethodRecompilationCutoff
86 if (!Platform.isServer()) {
87 return;
88 }
89
90 if (skipXcompOSR()) {
91 return;
92 }
93 if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
94 throw new RuntimeException(method + " must be compilable");
95 }
96 System.out.println("PerMethodRecompilationCutoff = "
97 + PER_METHOD_RECOMPILATION_CUTOFF);
98 if (PER_METHOD_RECOMPILATION_CUTOFF == -1) {
99 System.err.println(
100 "Warning: test is not applicable if PerMethodRecompilationCutoff == Inf");
101 return;
102 }
103
104 // deoptimize 'PerMethodRecompilationCutoff' times
105 for (long attempts = 0, successes = 0;
106 (successes < PER_METHOD_RECOMPILATION_CUTOFF) &&
107 (attempts < PER_METHOD_RECOMPILATION_CUTOFF*2) &&
108 isCompilable(COMP_LEVEL_FULL_OPTIMIZATION); attempts++) {
109 if (compileAndDeoptimize() == COMP_LEVEL_FULL_OPTIMIZATION) {
110 successes++;
111 }
112 }
113
114 if (!testCase.isOsr() && !isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
115 // in osr test case count of deopt maybe more than iterations
116 throw new RuntimeException(method + " is not compilable after "
117 + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
118 }
119
120 // Now compile once more
121 compileAndDeoptimize();
122
123 if (isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
124 throw new RuntimeException(method + " is still compilable after "
125 + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
126 }
127 checkNotCompiled();
128 compile();
129 waitBackgroundCompilation();
130 checkNotCompiled(COMP_LEVEL_FULL_OPTIMIZATION);
131
132 // WB.clearMethodState() must reset no-compilable flags
133 WHITE_BOX.clearMethodState(method);
134 if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
135 throw new RuntimeException(method
136 + " is not compilable after clearMethodState()");
137 }
138 compile();
139 checkCompiled();
140 }
141
142 private int compileAndDeoptimize() throws Exception {
143 compile();
144 waitBackgroundCompilation();
145 int compLevel = getCompLevel();
146 deoptimize();
147 return compLevel;
148 }
149 }