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 /testlibrary /test/lib /
30 * @modules java.base/jdk.internal.misc
31 * java.management
32 *
33 * @build jdk.test.lib.*
34 * sun.hotspot.WhiteBox
35 * @build compiler.whitebox.IsMethodCompilableTest
36 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
37 * sun.hotspot.WhiteBox$WhiteBoxPermission
38 * jdk.test.lib.Platform
39 * @run main/othervm/timeout=2400 -XX:-TieredCompilation -Xmixed
40 * -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
41 * -XX:PerMethodRecompilationCutoff=3 -XX:-UseCounterDecay
42 * -XX:CompileCommand=compileonly,compiler.whitebox.SimpleTestCaseHelper::*
43 * compiler.whitebox.IsMethodCompilableTest
44 */
45
46 package compiler.whitebox;
47
48 import jdk.test.lib.Platform;
49
50 public class IsMethodCompilableTest extends CompilerWhiteBoxTest {
51 /**
52 * Value of {@code -XX:PerMethodRecompilationCutoff}
53 */
54 protected static final long PER_METHOD_RECOMPILATION_CUTOFF;
55
56 static {
57 long tmp = Long.parseLong(
58 getVMOption("PerMethodRecompilationCutoff", "400"));
59 if (tmp == -1) {
60 PER_METHOD_RECOMPILATION_CUTOFF = -1 /* Inf */;
61 } else {
62 PER_METHOD_RECOMPILATION_CUTOFF = (0xFFFFFFFFL & tmp);
63 }
64 }
65
66 public static void main(String[] args) throws Exception {
67 CompilerWhiteBoxTest.main(IsMethodCompilableTest::new, args);
68 }
69
70 private IsMethodCompilableTest(TestCase testCase) {
71 super(testCase);
72 // to prevent inlining of #method
73 WHITE_BOX.testSetDontInlineMethod(method, true);
74 }
75
76 /**
77 * Tests {@code WB::isMethodCompilable()} by recompilation of tested method
78 * 'PerMethodRecompilationCutoff' times and checks compilation status. Also
79 * checks that WB::clearMethodState() clears no-compilable flags. Only
80 * applicable to c2 compiled methods.
81 *
82 * @throws Exception if one of the checks fails.
83 */
84 @Override
85 protected void test() throws Exception {
86
87 // Only c2 compilations can be disabled through PerMethodRecompilationCutoff
88 if (!Platform.isServer()) {
89 throw new Error("TESTBUG: Not server VM");
90 }
91
92 if (skipXcompOSR()) {
93 return;
94 }
95 if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
96 throw new RuntimeException(method + " must be compilable");
97 }
98 System.out.println("PerMethodRecompilationCutoff = "
99 + PER_METHOD_RECOMPILATION_CUTOFF);
100 if (PER_METHOD_RECOMPILATION_CUTOFF == -1) {
101 System.err.println(
102 "Warning: test is not applicable if PerMethodRecompilationCutoff == Inf");
103 return;
104 }
105
106 // deoptimize 'PerMethodRecompilationCutoff' times
107 for (long attempts = 0, successes = 0;
108 (successes < PER_METHOD_RECOMPILATION_CUTOFF) &&
109 (attempts < PER_METHOD_RECOMPILATION_CUTOFF*2) &&
110 isCompilable(COMP_LEVEL_FULL_OPTIMIZATION); attempts++) {
111 if (compileAndDeoptimize() == COMP_LEVEL_FULL_OPTIMIZATION) {
112 successes++;
113 }
114 }
115
116 if (!testCase.isOsr() && !isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
117 // in osr test case count of deopt maybe more than iterations
118 throw new RuntimeException(method + " is not compilable after "
119 + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
120 }
121
122 // Now compile once more
123 compileAndDeoptimize();
124
125 if (isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
126 throw new RuntimeException(method + " is still compilable after "
127 + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");
128 }
129 checkNotCompiled();
130 compile();
131 waitBackgroundCompilation();
132 checkNotCompiled(COMP_LEVEL_FULL_OPTIMIZATION);
133
134 // WB.clearMethodState() must reset no-compilable flags
135 WHITE_BOX.clearMethodState(method);
136 if (!isCompilable(COMP_LEVEL_FULL_OPTIMIZATION)) {
137 throw new RuntimeException(method
138 + " is not compilable after clearMethodState()");
139 }
140 compile();
141 checkCompiled();
142 }
143
144 private int compileAndDeoptimize() throws Exception {
145 compile();
146 waitBackgroundCompilation();
147 int compLevel = getCompLevel();
148 deoptimize();
149 return compLevel;
150 }
151 }