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  1. JDK
  2. JDK-8232757

VM fails to report an error for DumpLoadedClassList when cds is disabled

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 14
    • Component/s: hotspot
    • Labels:
      None
    • Subcomponent:
    • Resolved In Build:
      b20

      Description

      -XX:DumpLoadedClassList doesn't work as expected when cds is disabled.

      * Reproduce
      -------------------------------------
      # For a VM with cds disabled, just run
      java -XX:DumpLoadedClassList=my.log ...
      -------------------------------------

      * Background
      This bug was found while we were debugging a jdk build error.
      -------------------------------------
      bash configure --disable-cds --enable-generate-classlist ...
      make images
      -------------------------------------

      The following was the failing message.
      -------------------------------------
      Compiling 1 files for CLASSLIST_JAR
      Note: Some input files use or override a deprecated API.
      Note: Recompile with -Xlint:deprecation for details.
      Note: Some input files use unchecked or unsafe operations.
      Note: Recompile with -Xlint:unchecked for details.
      Creating support/demos/image/jfc/J2Ddemo/J2Ddemo.jar
      Creating support/classlist.jar
      /bin/grep: /home/fool/workspace/jdk/build/linux-x86_64-server-release/support/link_opt/classlist.raw: No such file or directory
      make[3]: *** [/home/fool/workspace/jdk/build/linux-x86_64-server-release/support/link_opt/classlist] Error 2
      make[3]: *** Deleting file '/home/fool/workspace/jdk/build/linux-x86_64-server-release/support/link_opt/classlist'
      GenerateLinkOptData.gmk:65: recipe for target '/home/fool/workspace/jdk/build/linux-x86_64-server-release/support/link_opt/classlist' failed
      make[2]: *** [generate-link-opt-data] Error 2
      make/Main.gmk:495: recipe for target 'generate-link-opt-data' failed

      ERROR: Build failed for target 'images' in configuration 'linux-x86_64-server-release' (exit code 2)
      Stopping sjavac server
      -------------------------------------

      * Analysis
      The failure is actually caused by -XX:DumpLoadedClassList [1], which doesn't work as expected when cds is disabled.
      People may get confused since the VM fails to report an error for DumpLoadedClassList when cds is disabled.

      [1] http://hg.openjdk.java.net/jdk/jdk/file/ca620b06b5c9/make/GenerateLinkOptData.gmk#l68

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              Assignee:
              jiefu Jie Fu
              Reporter:
              jiefu Jie Fu
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                Created:
                Updated:
                Resolved: