diff options
| author | Markus Armbruster <armbru@redhat.com> | 2019-08-12 07:23:37 +0200 |
|---|---|---|
| committer | Markus Armbruster <armbru@redhat.com> | 2019-08-16 13:31:52 +0200 |
| commit | 13d4ff07e8ce524ee0f7904b1f7d3a2fdb98b9c4 (patch) | |
| tree | d20b287db4580672eb5bb62bfcd95292b9892784 /scripts/tracetool/format/h.py | |
| parent | 988fa1030401b9cec82d26ec7a01f2df7326dde5 (diff) | |
trace: Do not include qom/cpu.h into generated trace.h
docs/devel/tracing.txt explains "since many source files include
trace.h, [the generated trace.h use] a minimum of types and other
header files included to keep the namespace clean and compile times
and dependencies down."
Commit 4815185902 "trace: Add per-vCPU tracing states for events with
the 'vcpu' property" made them all include qom/cpu.h via
control-internal.h. qom/cpu.h in turn includes about thirty headers.
Ouch.
Per-vCPU tracing is currently not supported in sub-directories'
trace-events. In other words, qom/cpu.h can only be used in
trace-root.h, not in any trace.h.
Split trace/control-vcpu.h off trace/control.h and
trace/control-internal.h. Have the generated trace.h include
trace/control.h (which no longer includes qom/cpu.h), and trace-root.h
include trace/control-vcpu.h (which includes it).
The resulting improvement is a bit disappointing: in my "build
everything" tree, some 1100 out of 6600 objects (not counting tests
and objects that don't depend on qemu/osdep.h) depend on a trace.h,
and about 600 of them no longer depend on qom/cpu.h. But more than
1300 others depend on trace-root.h. More work is clearly needed.
Left for another day.
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190812052359.30071-8-armbru@redhat.com>
Diffstat (limited to 'scripts/tracetool/format/h.py')
| -rw-r--r-- | scripts/tracetool/format/h.py | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/scripts/tracetool/format/h.py b/scripts/tracetool/format/h.py index 338a2365ee..5596b304e6 100644 --- a/scripts/tracetool/format/h.py +++ b/scripts/tracetool/format/h.py @@ -17,12 +17,17 @@ from tracetool import out def generate(events, backend, group): + if group == "root": + header = "trace/control-vcpu.h" + else: + header = "trace/control.h" + out('/* This file is autogenerated by tracetool, do not edit. */', '', '#ifndef TRACE_%s_GENERATED_TRACERS_H' % group.upper(), '#define TRACE_%s_GENERATED_TRACERS_H' % group.upper(), '', - '#include "trace/control.h"', + '#include "%s"' % header, '') for e in events: |