[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.6-270-g3141c98

[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.6-270-g3141c98

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- Log -----------------------------------------------------------------
commit 3141c9874bc41a0ef16fc0067827be47c475a171
Author: Mark Wielaard <mjw@redhat.com>
Date:   Wed Oct 5 15:04:17 2011 +0200

    Support same value rules in unwinder. Don't treat undefined as same value.
    
    The unwinder treated undefined and same value rules the same. This patch
    introduces different states for them. All "real" registers are assumed to
    be "same value". Their value will be carried over to the next frame unless
    overruled. All other "fake" dwarf registers are treated as undefined.
    This makes a difference for architectures where for example the dwarf
    return register is a real register, where same value means something
    different from undefined (e.g. ppc).

-----------------------------------------------------------------------

Summary of changes:
 runtime/unwind.c        |   44 ++++++++++++++++++++++++++++++++++++--------
 runtime/unwind/i386.h   |    6 ++++--
 runtime/unwind/unwind.h |    8 ++++++++
 runtime/unwind/x86_64.h |    6 ++++--
 4 files changed, 52 insertions(+), 12 deletions(-)


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