Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/HelloWorld.java @ 6972:bd7a7ce2e264
6830717: replay of compilations would help with debugging
Summary: When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method.
Reviewed-by: kvn, twisti, sspitsyn
Contributed-by: yumin.qi@oracle.com
| author | minqi |
|---|---|
| date | Mon, 12 Nov 2012 14:03:53 -0800 |
| parents | 37be97a58393 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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7010849: 5/5 Extraneous javac source/target options when building sa-jdi
andrew
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2 * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
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diff
changeset
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20 * or visit www.oracle.com if you need additional information or have any |
|
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6941466: Oracle rebranding changes for Hotspot repositories
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot; | |
| 26 | |
| 27 import java.lang.reflect.*; | |
| 28 | |
| 29 public class HelloWorld { | |
| 30 private static String helloWorldString = "Hello, world!"; | |
| 31 private static volatile int helloWorldTrigger = 0; | |
| 32 private static final boolean useMethodInvoke = false; | |
| 33 private static Object lock = new Object(); | |
| 34 | |
| 35 public static void main(String[] args) { | |
| 36 int foo = a(); | |
| 37 | |
| 38 System.out.println("HelloWorld exiting. a() = " + foo); | |
| 39 } | |
| 40 | |
| 41 private static int a() { | |
| 42 return 1 + b(); | |
| 43 } | |
| 44 | |
| 45 private static int b() { | |
| 46 return 1 + c(); | |
| 47 } | |
| 48 | |
| 49 private static int c() { | |
| 50 return 1 + d("Hi"); | |
| 51 } | |
| 52 | |
| 53 private static int d(String x) { | |
| 54 System.out.println("HelloWorld.d() received \"" + x + "\" as argument"); | |
| 55 synchronized(lock) { | |
| 56 if (useMethodInvoke) { | |
| 57 try { | |
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2471
37be97a58393
7010849: 5/5 Extraneous javac source/target options when building sa-jdi
andrew
parents:
1552
diff
changeset
|
58 Method method = HelloWorld.class.getMethod("e"); |
| 0 | 59 Integer result = (Integer) method.invoke(null, new Object[0]); |
| 60 return result.intValue(); | |
| 61 } | |
| 62 catch (Exception e) { | |
| 63 throw new RuntimeException(e.toString()); | |
| 64 } | |
| 65 } else { | |
| 66 | |
| 67 int i = fib(10); // 89 | |
| 68 long l = i; | |
| 69 float f = i; | |
| 70 double d = i; | |
| 71 char c = (char) i; | |
| 72 short s = (short) i; | |
| 73 byte b = (byte) i; | |
| 74 | |
| 75 int ret = e(); | |
| 76 | |
| 77 System.out.println("Tenth Fibonacci number in all formats: " + | |
| 78 i + ", " + | |
| 79 l + ", " + | |
| 80 f + ", " + | |
| 81 d + ", " + | |
| 82 c + ", " + | |
| 83 s + ", " + | |
| 84 b); | |
| 85 | |
| 86 return ret; | |
| 87 } | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 public static int e() { | |
| 92 System.out.println("Going to sleep..."); | |
| 93 | |
| 94 int i = 0; | |
| 95 | |
| 96 while (helloWorldTrigger == 0) { | |
| 97 if (++i == 1000000) { | |
| 98 System.gc(); | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 System.out.println(helloWorldString); | |
| 103 | |
| 104 while (helloWorldTrigger != 0) { | |
| 105 } | |
| 106 | |
| 107 return i; | |
| 108 } | |
| 109 | |
| 110 // Tree-recursive implementation for test | |
| 111 public static int fib(int n) { | |
| 112 if (n < 2) { | |
| 113 return 1; | |
| 114 } | |
| 115 return fib(n - 1) + fib(n - 2); | |
| 116 } | |
| 117 } |