FYI: Add systemtap hotspot.object_alloc workaround

[Mark Wielaard]

Hi,

Thanks to testing by Will and hunting down the bug in the dwarf
debuginfo from which the size argument was calculated by Deepak and
Jakub we came up with the following workaround:

        Add workaround for calculating systemtap object_alloc probe size
        argument.
        
        Generating a dwarf location expression for variable * "constant"
        as used in the hotspot.object_alloc probe argument triggers
        unforeseen complications. See
        https://bugzilla.redhat.com/show_bug.cgi?id=613824
        Workaround for now by passing the size without HeapWordSize
        adjustment.
        
        2010-07-29  Mark Wielaard  <mjw at redhat.com>
        
        * patches/systemtap-alloc-size-workaround.patch: New patch.
        * Makefile.am (ICEDTEA_PATCHES): Add new patch for
        ENABLE_SYSTEMTAP.
        * tapset/hotspot.stp.in (object_alloc): Calculate size from
        $arg4 and $HeapWordSize.

Committed and pushed to icedtea6 trunks.

Cheers,

Mark
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