Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8217362

Emergency dump does not work when disk=false is set

    XMLWordPrintable

Details

    • jfr
    • b14

    Backports

      Description

        Emergency dump does not work when disk=false is set to -XX:StartFlightRecodging.
        I investigated this with strace on Linux x64. HotSpot attempted to open emergency flight record file, but open syscall returned ENOENT as below:

        -------------
        [pid 4929] openat(AT_FDCWD, "/home/ysuenaga/github/garakuta/NativeSEGV/hs_err_pid4928.jfr", O_RDWR|O_CLOEXEC) = -1 ENOENT (No such file or directory)
        -------------

        We need to pass `O_CREAT | O_WRONLY` to `os::open()`.
        (disk=true (default) works fine)


        How to reproduce:

        1. Build testcase
          https://github.com/YaSuenag/garakuta/tree/master/NativeSEGV
            $ export JAVA_HOME=<path>
            $ make

        2. Run testcase
            $ $JAVA_HOME/bin/java -XX:StartFlightRecording=disk=false -Djava.library.path=. NativeSEGV

        Attachments

          Issue Links

            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8231834 Emergency dump does not work when disk=false is set

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8257484 Emergency dump does not work when disk=false is set

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8262947 Emergency dump does not work when disk=false is set

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8261020 Wrong format parameter in create_emergency_chunk_path

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Activity

              People

                mgronlun Markus Grönlund
                ysuenaga Yasumasa Suenaga
                Votes:
                0 Vote for this issue
                Watchers:
                7 Start watching this issue

                Dates

                  Created:
                  Updated:
                  Resolved: