Module openj9.dtfj
Package com.ibm.j9ddr.view.dtfj.image

Class J9DDRImageProcess

java.lang.Object
com.ibm.j9ddr.view.dtfj.image.J9DDRImageProcess
All Implemented Interfaces:
ImageProcess
public class J9DDRImageProcess extends Object implements ImageProcess
Adapter for DDR IProcesses to make them implement the ImageProcess API

  • Constructor Details

    • J9DDRImageProcess

      public J9DDRImageProcess(IProcess thisProcess)

  • Method Details

    • getIProcess

      public IProcess getIProcess()

    • getCommandLine

      public String getCommandLine() throws DataUnavailable, CorruptDataException
      This method tries to get command line of the program that generated core file. We can't get the command line from the core dump on zOS, or on recent Windows versions. On Linux it may be truncated. The java launcher stores the command line in an environment variable, so for all platforms we now try that first, with the core reader as a fallback.
      Specified by:
      getCommandLine in interface ImageProcess
      Returns:
      String instance of the commandline
      Throws:
      DataUnavailable
      CorruptDataException

    • getCurrentThread

      public ImageThread getCurrentThread() throws CorruptDataException
      This method returns the ImageThread that matches the TID stored in the J9RAS data structure, or case 1: if no J9RAS structure available return null case 2: if J9RAS structure available but no TID field (old JVMs, old jextract behaviour) - return the first thread, or null if no threads case 3: if J9RAS structure available with TID field but TID is zero (eg dump triggered outside JVM) - platform specific code if core readers have identified a current thread, else... case 4: if J9RAS structure available with TID field but no match (eg Linux), return a stub ImageThread
      Specified by:
      getCurrentThread in interface ImageProcess
      Returns:
      ImageThread
      Throws:
      CorruptDataException
      See Also:

    • getEnvironment

      public Properties getEnvironment() throws DataUnavailable, CorruptDataException
      This method gets the environment variables. First it tries to extract it from RAS structure. If not, it tries to get it from loaded modules.
      Specified by:
      getEnvironment in interface ImageProcess
      Returns:
      Properties instance of environment variables.
      Throws:
      DataUnavailable
      CorruptDataException

    • getExecutable

      public ImageModule getExecutable() throws DataUnavailable, CorruptDataException
      Description copied from interface: ImageProcess
      Get the module representing the executable within the image.
      Specified by:
      getExecutable in interface ImageProcess
      Returns:
      the module representing the executable within the image (as opposed to modules representing libraries)
      Throws:
      DataUnavailable - if the information cannot be provided
      CorruptDataException
      See Also:

    • getID

      public String getID() throws DataUnavailable, CorruptDataException
      Description copied from interface: ImageProcess
      Get the system-wide identifier for the process.
      Specified by:
      getID in interface ImageProcess
      Returns:
      a system-wide identifier for the process (e.g. a process id (pid) on Unix like systems)
      Throws:
      DataUnavailable - if the information cannot be provided
      CorruptDataException

    • getLibraries

      public Iterator<?> getLibraries() throws DataUnavailable, CorruptDataException
      Description copied from interface: ImageProcess
      Get the set of shared libraries which are loaded in this process.
      Specified by:
      getLibraries in interface ImageProcess
      Returns:
      an iterator to iterate over the shared libraries which are loaded in this process
      Throws:
      DataUnavailable - if the information cannot be provided
      CorruptDataException
      See Also:

    • getPointerSize

      public int getPointerSize()
      Description copied from interface: ImageProcess
      Determine the pointer size used by this process. Currently supported values are 31, 32 or 64. In the future, other pointer sizes may also be supported.
      Specified by:
      getPointerSize in interface ImageProcess
      Returns:
      the size of a pointer, in bits

    • getRuntimes

      public Iterator<?> getRuntimes()
      Description copied from interface: ImageProcess
      Get the set of the known ManagedRuntime environments in the image.
      Specified by:
      getRuntimes in interface ImageProcess
      Returns:
      an iterator to iterate over all of the known ManagedRuntime environments in the image. In a typical image, there will be only one runtime, and it will be an instance of JavaRuntime. However any user of this API should be aware that there is a possibility that other runtimes may exist in the image
      See Also:

    • getSignalName

      public String getSignalName() throws DataUnavailable, CorruptDataException
      Description copied from interface: ImageProcess
      Get the name of the OS signal in this process which triggered the creation of this image.
      Specified by:
      getSignalName in interface ImageProcess
      Returns:
      the name of the OS signal in this process which triggered the creation of this image, or null if the image was not created because of a signal in this process
      Throws:
      DataUnavailable - if the information cannot be provided
      CorruptDataException

    • getSignalNumber

      public int getSignalNumber() throws DataUnavailable, CorruptDataException
      Description copied from interface: ImageProcess
      Get the OS signal number in this process which triggered the creation of this image.
      Specified by:
      getSignalNumber in interface ImageProcess
      Returns:
      the OS signal number in this process which triggered the creation of this image, or 0 if the image was not created because of a signal in this process
      Throws:
      DataUnavailable - if the information cannot be provided
      CorruptDataException

    • getThreads

      public Iterator<?> getThreads()
      Description copied from interface: ImageProcess
      Get the set of image threads in the image.
      Specified by:
      getThreads in interface ImageProcess
      Returns:
      an iterator to iterate over each ImageThread in the image There is not necessarily any relationship between JavaThreads and ImageThreads. A JVM implementation may use an n:m mapping of JavaThreads to ImageThreads, and not all ImageThreads are necessarily attached.
      See Also:

    • getThread

      public J9DDRBaseImageThread getThread(long id)

    • getVersion

      public String getVersion()
      Return the build version (e.g. 29) of the first VM in the process (useful for testing). Would be nice if DTFJJavaRuntime could implement this method, but that would be complicated as there are multiple version-packaged DTFJJavaRuntimes (e.g. j9ddr.vmxx.view.dtfj.java.DTFJJavaRunTime) and tests are not version-packaged.

    • getProperties

      public Properties getProperties()
      Description copied from interface: ImageProcess
      Gets the OS specific properties for this process.
      Specified by:
      getProperties in interface ImageProcess
      Returns:
      a set of OS specific properties