* frysk/rt/StackAccessors.java#getElfImage() suggestions?
@ 2007-04-27 14:35 Nurdin Premji
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From: Nurdin Premji @ 2007-04-27 14:35 UTC (permalink / raw)
To: frysk
The method getElfImage() inside of frysk/rt/StackAccessors.java
currently depends on a running process. It is used by libunwind to map
an elfImage (or vdso segment) into local memory. It works by finding
the elf image file name and mmapping it into memory, also keeping track
of the offset into the file that was mapped, and the lowAddress of that
segment (as displayed in proc/$$/maps).
The question is how to refactor this to account for core processes.
One way is by using a Proc.getElfImageInfo method that could return the
name, lowAddress, and offset fields to the getElfImage and it would just
map that file. The problem comes with the vdso section, mapping this
section would be different between core and running processes. There is
a method: lib.unwind.Unwind.createElfImageFromVDSO (might be better to
call it ...FromRunningProcessVDSO) which will create an elfImage from a
running processes vdso so perhaps a similar method for core process VDSO
could be created.
Any suggestions?
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