qemu/scripts/tracetool
Stefan Hajnoczi b33b890cd0 trace: avoid SystemTap dtrace(1) warnings on empty files
target/hppa/trace-events only contains disabled events, resulting in a
trace-dtrace.dtrace file that says "provider qemu {}".  SystemTap's
dtrace(1) tool prints a warning when processing this input file.

This patch avoids the error by emitting an empty file instead of
"provider qemu {}" when there are no enabled trace events.

Fixes: 23c3d569f4 ("target/hppa: add TLB trace events")
Reported-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Message-id: 20190321170831.6539-3-stefanha@redhat.com
Message-Id: <20190321170831.6539-3-stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-03-22 15:55:50 +00:00
..
backend tracetool: Include thread id information in log backend 2018-12-12 10:04:59 +00:00
format trace: avoid SystemTap dtrace(1) warnings on empty files 2019-03-22 15:55:50 +00:00
__init__.py trace: forbid use of %m in trace event format strings 2019-01-24 14:16:56 +00:00
transform.py trace: Add 'vcpu' event property to trace guest vCPU 2016-03-01 13:27:10 +00:00
vcpu.py trace: Add 'vcpu' event property to trace guest vCPU 2016-03-01 13:27:10 +00:00