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