Mercurial > hg > truffle
annotate agent/test/libproc/LibprocClient.java @ 20543:e7d0505c8a30
8059758: Footprint regressions with JDK-8038423
Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything.
Reviewed-by: jwilhelm, brutisso
| author | tschatzl |
|---|---|
| date | Fri, 10 Oct 2014 15:51:58 +0200 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2003, 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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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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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 import sun.jvm.hotspot.oops.*; | |
| 26 import sun.jvm.hotspot.runtime.*; | |
| 27 import sun.jvm.hotspot.tools.*; | |
| 28 import sun.jvm.hotspot.utilities.*; | |
| 29 | |
| 30 /** | |
| 31 We don't run any of the "standard" SA command line tools for sanity | |
| 32 check. This is because the standard tools print addresses in hex | |
| 33 which could change legally. Also, textual comparison of output may | |
| 34 not match because of other reasons as well. This tool checks | |
| 35 validity of threads and frames logically. This class has reference | |
| 36 frame names from "known" threads. The debuggee is assumed to run | |
| 37 "LibprocTest.java". | |
| 38 */ | |
| 39 | |
| 40 public class LibprocClient extends Tool { | |
| 41 | |
| 42 public void run() { | |
| 43 // try to get VM version and check | |
| 44 String version = VM.getVM().getVMRelease(); | |
| 45 Assert.that(version.startsWith("1.5"), "1.5 expected"); | |
| 46 | |
| 47 // try getting threads | |
| 48 Threads threads = VM.getVM().getThreads(); | |
| 49 boolean mainTested = false; | |
| 50 | |
| 51 // check frames of each thread | |
| 52 for (JavaThread cur = threads.first(); cur != null; cur = cur.next()) { | |
| 53 if (cur.isJavaThread()) { | |
| 54 String name = cur.getThreadName(); | |
| 55 // testing of basic frame walking for all threads | |
| 56 for (JavaVFrame vf = getLastJavaVFrame(cur); vf != null; vf = vf.javaSender()) { | |
| 57 checkFrame(vf); | |
| 58 } | |
| 59 | |
| 60 // special testing for "known" threads. For now, only "main" thread. | |
| 61 if (name.equals("main")) { | |
| 62 checkMainThread(cur); | |
| 63 mainTested = true; | |
| 64 } | |
| 65 } | |
| 66 } | |
| 67 Assert.that(mainTested, "main thread missing"); | |
| 68 } | |
| 69 | |
| 70 public static void main(String[] args) { | |
| 71 try { | |
| 72 LibprocClient lc = new LibprocClient(); | |
| 73 lc.start(args); | |
| 74 lc.getAgent().detach(); | |
| 75 System.out.println("\nPASSED\n"); | |
| 76 } catch (Exception exp) { | |
| 77 System.out.println("\nFAILED\n"); | |
| 78 exp.printStackTrace(); | |
| 79 } | |
| 80 } | |
| 81 | |
| 82 // -- Internals only below this point | |
| 83 private static JavaVFrame getLastJavaVFrame(JavaThread cur) { | |
| 84 RegisterMap regMap = cur.newRegisterMap(true); | |
| 85 Frame f = cur.getCurrentFrameGuess(); | |
| 86 if (f == null) { | |
| 87 System.err.println(" (Unable to get a top most frame)"); | |
| 88 return null; | |
| 89 } | |
| 90 VFrame vf = VFrame.newVFrame(f, regMap, cur, true, true); | |
| 91 if (vf == null) { | |
| 92 System.err.println(" (Unable to create vframe for topmost frame guess)"); | |
| 93 return null; | |
| 94 } | |
| 95 if (vf.isJavaFrame()) { | |
| 96 return (JavaVFrame) vf; | |
| 97 } | |
| 98 return (JavaVFrame) vf.javaSender(); | |
| 99 } | |
| 100 | |
| 101 private void checkMethodSignature(Symbol sig) { | |
| 102 SignatureIterator itr = new SignatureIterator(sig) { | |
| 103 public void doBool () {} | |
| 104 public void doChar () {} | |
| 105 public void doFloat () {} | |
| 106 public void doDouble() {} | |
| 107 public void doByte () {} | |
| 108 public void doShort () {} | |
| 109 public void doInt () {} | |
| 110 public void doLong () {} | |
| 111 public void doVoid () {} | |
| 112 public void doObject(int begin, int end) {} | |
| 113 public void doArray (int begin, int end) {} | |
| 114 }; | |
| 115 // this will throw RuntimeException for any invalid item in signature. | |
| 116 itr.iterate(); | |
| 117 } | |
| 118 | |
| 119 private void checkBCI(Method m, int bci) { | |
| 120 if (! m.isNative()) { | |
| 121 byte[] buf = m.getByteCode(); | |
| 122 Assert.that(bci >= 0 && bci < buf.length, "invalid bci, not in code range"); | |
| 123 if (m.hasLineNumberTable()) { | |
| 124 int lineNum = m.getLineNumberFromBCI(bci); | |
| 125 Assert.that(lineNum >= 0, "expecting non-negative line number"); | |
| 126 } | |
| 127 } | |
| 128 } | |
| 129 | |
| 130 private void checkMethodHolder(Method method) { | |
| 131 Klass klass = method.getMethodHolder(); | |
| 132 Assert.that(klass != null, "expecting non-null instance klass"); | |
| 133 } | |
| 134 | |
| 135 private void checkFrame(JavaVFrame vf) { | |
| 136 Method method = vf.getMethod(); | |
| 137 Assert.that(method != null, "expecting a non-null method here"); | |
| 138 Assert.that(method.getName() != null, "expecting non-null method name"); | |
| 139 checkMethodHolder(method); | |
| 140 checkMethodSignature(method.getSignature()); | |
| 141 checkBCI(method, vf.getBCI()); | |
| 142 } | |
| 143 | |
| 144 // from the test case LibprocTest.java - in the main thread we | |
| 145 // should see frames as below | |
| 146 private static String[] mainThreadMethods = new String[] { | |
| 147 "java.lang.Object.wait(long)", | |
| 148 "java.lang.Object.wait()", | |
| 149 "LibprocTest.main(java.lang.String[])" | |
| 150 }; | |
| 151 | |
| 152 private void checkMainThread(JavaThread thread) { | |
| 153 checkFrames(thread, mainThreadMethods); | |
| 154 } | |
| 155 | |
| 156 private void checkFrames(JavaThread thread, String[] expectedMethodNames) { | |
| 157 int i = 0; | |
| 158 for (JavaVFrame vf = getLastJavaVFrame(thread); vf != null; vf = vf.javaSender(), i++) { | |
| 159 Method m = vf.getMethod(); | |
| 160 Assert.that(m.externalNameAndSignature().equals(expectedMethodNames[i]), | |
| 161 "expected frame missing"); | |
| 162 } | |
| 163 } | |
| 164 } |