Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 52 insertions, 0 deletions

diff --git a/scripts/tracetool/backend/syslog.py b/scripts/tracetool/backend/syslog.py
new file mode 100644
index 000000000..5a3a00fe3
--- /dev/null
+++ b/scripts/tracetool/backend/syslog.py
@@ -0,0 +1,52 @@
+# -*- coding: utf-8 -*-
+
+"""
+Syslog built-in backend.
+"""
+
+__author__     = "Paul Durrant <paul.durrant@citrix.com>"
+__copyright__  = "Copyright 2016, Citrix Systems Inc."
+__license__    = "GPL version 2 or (at your option) any later version"
+
+__maintainer__ = "Stefan Hajnoczi"
+__email__      = "stefanha@redhat.com"
+
+
+from tracetool import out
+
+
+PUBLIC = True
+
+
+def generate_h_begin(events, group):
+    out('#include <syslog.h>',
+        '')
+
+
+def generate_h(event, group):
+    argnames = ", ".join(event.args.names())
+    if len(event.args) > 0:
+        argnames = ", " + argnames
+
+    if "vcpu" in event.properties:
+        # already checked on the generic format code
+        cond = "true"
+    else:
+        cond = "trace_event_get_state(%s)" % ("TRACE_" + event.name.upper())
+
+    out('    if (%(cond)s) {',
+        '#line %(event_lineno)d "%(event_filename)s"',
+        '        syslog(LOG_INFO, "%(name)s " %(fmt)s %(argnames)s);',
+        '#line %(out_next_lineno)d "%(out_filename)s"',
+        '    }',
+        cond=cond,
+        event_lineno=event.lineno,
+        event_filename=event.filename,
+        name=event.name,
+        fmt=event.fmt.rstrip("\n"),
+        argnames=argnames)
+
+
+def generate_h_backend_dstate(event, group):
+    out('    trace_event_get_state_dynamic_by_id(%(event_id)s) || \\',
+        event_id="TRACE_" + event.name.upper())