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annotate test/runtime/NMT/MallocSiteHashOverflow.java @ 20628:80260967f994

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8061969: [TESTBUG] MallocSiteHashOverflow.java should be enabled for 32-bit platforms Reviewed-by: ctornqvi, coleenp
author gtriantafill
date Wed, 05 Nov 2014 08:22:17 -0800
parents 3f9ff5e261c6
children ec2c6fdd1ce6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 /*
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25 * @test
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26 * @summary Test corner case that overflows malloc site hashtable bucket
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27 * @requires sun.arch.data.model == "32"
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28 * @key nmt jcmd stress
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29 * @library /testlibrary /testlibrary/whitebox
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30 * @ignore 8062870
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31 * @build MallocSiteHashOverflow
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32 * @run main ClassFileInstaller sun.hotspot.WhiteBox
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33 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocSiteHashOverflow
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34 */
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35
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36 import com.oracle.java.testlibrary.*;
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37 import sun.hotspot.WhiteBox;
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38
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39 public class MallocSiteHashOverflow {
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40
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41 public static void main(String args[]) throws Exception {
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42
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43 // Size of entries based on malloc tracking header defined in mallocTracker.hpp
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44 // For 32-bit systems, create 257 malloc sites with the same hash bucket to overflow a hash bucket
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45 long entries = 257;
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46
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47 OutputAnalyzer output;
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48 WhiteBox wb = WhiteBox.getWhiteBox();
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49 int MAX_HASH_SIZE = wb.NMTGetHashSize();
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50
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51 // Grab my own PID
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52 String pid = Integer.toString(ProcessTools.getProcessId());
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53 ProcessBuilder pb = new ProcessBuilder();
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54
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55 // Verify that current tracking level is "detail"
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56 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "statistics"});
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57 output = new OutputAnalyzer(pb.start());
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58 output.shouldContain("Native Memory Tracking Statistics");
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59
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60 // Attempt to cause NMT to downgrade tracking level by allocating small amounts
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61 // of memory with random pseudo call stack
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62 int pc = 1;
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63 for (int i = 0; i < entries; i++) {
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64 long addr = wb.NMTMallocWithPseudoStack(1, pc);
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65 if (addr == 0) {
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66 throw new RuntimeException("NMTMallocWithPseudoStack: out of memory");
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67 }
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68 // We free memory here since it doesn't affect pseudo malloc alloc site hash table entries
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69 wb.NMTFree(addr);
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70 pc += MAX_HASH_SIZE;
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71 if (i == entries) {
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72 // Verify that tracking has been downgraded
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73 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "statistics"});
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74 output = new OutputAnalyzer(pb.start());
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75 output.shouldContain("Tracking level has been downgraded due to lack of resources");
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76 }
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77 }
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78 }
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79 }