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[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.6-270-g3141c98
- From: mark at sourceware dot org
- To: systemtap-cvs at sourceware dot org
- Date: 5 Oct 2011 13:09:22 -0000
- Subject: [SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.6-270-g3141c98
- Reply-to: systemtap at sourceware dot org
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from 0a86b79297aae856b9e672f4ca1369d3911280df (commit)
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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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systemtap: system-wide probe/trace tool