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[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.6-103-gfc67feb
- From: mark at sourceware dot org
- To: systemtap-cvs at sourceware dot org
- Date: 16 Aug 2011 13:09:22 -0000
- Subject: [SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.6-103-gfc67feb
- Reply-to: systemtap at sourceware dot org
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- Log -----------------------------------------------------------------
commit fc67febc6733e5803e6883a3757abda6268a953a
Author: Mark Wielaard <mjw@redhat.com>
Date: Tue Aug 16 14:31:29 2011 +0200
Reintroduce timer for transport cmd channel, don't wake_up unconditionally.
Revert parts of commit a85c8a "runtime/io.c: Explicitly signal setting of
_stp_exit_flag" and commit 46ac9e "Remove _stp_ctl_work_timer from module
transport layer". Introduce a new test wake_up.exp that shows a deadlock
when sending cmd messages and waking up the reader immediately.
Renamed _stp_ctl_write to _stp_ctl_send, which can be called from
everywhere. Rename _stp_ctl_send to _stp_ctl_send_notify that can be
called from user context in the transport layer itself (this will
immediately notify any readers). Document all places that use
_stp_ctl_send_notify directly to clarify why that is safe.
See http://sourceware.org/ml/systemtap/2011-q3/msg00163.html
-----------------------------------------------------------------------
Summary of changes:
runtime/io.c | 4 +-
runtime/print_flush.c | 8 ++-
runtime/transport/control.c | 93 ++++++++++++++++-------------------
runtime/transport/control.h | 3 +-
runtime/transport/transport.c | 69 +++++++++++++++++++++++--
runtime/transport/transport.h | 2 -
testsuite/systemtap.base/wakeup.exp | 24 +++++++++
testsuite/systemtap.base/wakeup.stp | 13 +++++
8 files changed, 153 insertions(+), 63 deletions(-)
create mode 100644 testsuite/systemtap.base/wakeup.exp
create mode 100644 testsuite/systemtap.base/wakeup.stp
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systemtap: system-wide probe/trace tool