frysk.dwfl
Class DwflCache

java.lang.Object
  frysk.dwfl.DwflCache

public class DwflCache
extends Object

Cache of most-recently opened Dwfl-s. This class ensures that code requiring dwfl always accesses the most recently opened version. If a process changes, and the Dwfl needs to be updated, this class will re-open the dwfl returning a new object.

Nested Class Summary

private static class

DwflCache.Mod

Field Summary

private static WeakHashMap	allDwfls Cache of all Dwfl objects.
private static Log	fine
private static WeakHashMap	modMap Map from a Task to its most recent Dwfl object.

Constructor Summary

DwflCache()

Method Summary

static void	clear()
static Dwfl	getDwfl(Task task) return a Dwfl for a Task.
private static File	getRelativeSysRoot(String execPathParm, File sysroot) Given: a mock generated /sys/root/dir/usr/bin/program /sys/root/dir/usr/lib/debug/usr/bin/program.debug Elfutils can be given an absolute or relative path to look for program.debug.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

fine

private static final Log fine

modMap

private static WeakHashMap modMap

Map from a Task to its most recent Dwfl object.

allDwfls

private static WeakHashMap allDwfls

Cache of all Dwfl objects.

Constructor Detail

DwflCache

public DwflCache()

Method Detail

getRelativeSysRoot

private static File getRelativeSysRoot(String execPathParm,
                                       File sysroot)

Given: a mock generated /sys/root/dir/usr/bin/program /sys/root/dir/usr/lib/debug/usr/bin/program.debug Elfutils can be given an absolute or relative path to look for program.debug. It will look in: 1. /sys/root/dir/usr/bin/program.debug 2. /sys/root/dir/usr/bin/a/relative/path/program.debug 3. /an/absolute/path/sys/root/dir/usr/bin/program.debug It would be helpful if it also looked in /an/absolute/path/program.debug so it could be given /sys/root/dir/usr/lib/debug/usr/bin. Lacking that we need to generate a relative path that has the same effect.

Parameters:

pathname - of executable

Returns:

a path where elfutils can find program.debug for separate debuginfo.

getDwfl

public static Dwfl getDwfl(Task task)

return a Dwfl for a Task.

Parameters:

task - the given Task.

Returns:

a Dwfl created using the tasks maps.

clear

public static void clear()