[Qemu-devel] [RFC][PATCH v2 00/11] trace-state: make the behaviour of "disable" consistent across all backends

[Lluís]

This patch defines the "disable" trace event state to always use the "nop"
backend.

As a side-effect, all events are now enabled (without "disable") by default, as
all backends (except "stderr") have programmatic support for dynamically
(de)activating each trace event.

In order to make this true, the "simple" backend now has a "-trace
events=<file>" argument to let the user select which events must be enabled from
the very beginning.

NOTES:
* Parsing of -trace arguments is not done in the OS-specific frontends.

Signed-off-by: Lluís Vilanova <address@hidden>
---

Changes in v2:

* Documentation fixes.
* Seggregate whitespace/indentation changes.
* Minor code beautifications.
* Make all -trace suboptions explicit.
* Fix minor comments from Stefan.
* Minor trace-events format fixes.
* Integrate changes from Fabien.
* Rebase on qemu.git/master (c8f930c0eeb696d638f4d4bf654e955fa44ff40f).

Lluís Vilanova (11):
      minor whitespace/indentation fixes
      docs/tracing.txt: minor documentation fixes
      trace: [ust] fix generation of 'trace.c' on events without args
      trace: [trace-events] fix print formats in some events
      trace: [simple] minor code fixes on conditional compilation
      trace: generalize the "property" concept in the trace-events file
      trace-state: always use the "nop" backend on events with the "disable" 
keyword
      trace-state: [simple] disable all trace points by default
      trace-state: [simple] add "-trace events" argument to control initial 
state
      trace-state: [stderr] add support for dynamically enabling/disabling 
events
      trace: enable all events


 Makefile.objs     |    8 +
 configure         |   33 ++--
 docs/tracing.txt  |   50 +++--
 hmp-commands.hx   |   38 ++--
 monitor.c         |   24 ++-
 qemu-config.c     |    8 +
 qemu-options.hx   |   26 ++-
 scripts/tracetool |  121 +++++++------
 simpletrace.h     |    7 -
 stderrtrace.c     |   24 +++
 stderrtrace.h     |   14 ++
 trace-events      |  491 ++++++++++++++++++++++++++---------------------------
 vl.c              |  104 ++++++++---
 13 files changed, 530 insertions(+), 418 deletions(-)
 create mode 100644 stderrtrace.c
 create mode 100644 stderrtrace.h