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