From e02cda008591317b1625707ff8e115a4841aa889 Mon Sep 17 00:00:00 2001
From: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 11:40:56 +0000
Subject: 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
---
scripts/tracetool/backend/dtrace.py | 72 +++++++++++++++++++++++++++++++++++++
1 file changed, 72 insertions(+)
create mode 100644 scripts/tracetool/backend/dtrace.py
(limited to 'scripts/tracetool/backend/dtrace.py')
diff --git a/scripts/tracetool/backend/dtrace.py b/scripts/tracetool/backend/dtrace.py
new file mode 100644
index 000000000..e17edc9b9
--- /dev/null
+++ b/scripts/tracetool/backend/dtrace.py
@@ -0,0 +1,72 @@
+# -*- coding: utf-8 -*-
+
+"""
+DTrace/SystemTAP backend.
+"""
+
+__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__ = "Copyright 2012-2017, Lluís Vilanova <vilanova@ac.upc.edu>"
+__license__ = "GPL version 2 or (at your option) any later version"
+
+__maintainer__ = "Stefan Hajnoczi"
+__email__ = "stefanha@redhat.com"
+
+
+from tracetool import out
+
+
+PUBLIC = True
+
+
+PROBEPREFIX = None
+
+def probeprefix():
+ if PROBEPREFIX is None:
+ raise ValueError("you must set PROBEPREFIX")
+ return PROBEPREFIX
+
+
+BINARY = None
+
+def binary():
+ if BINARY is None:
+ raise ValueError("you must set BINARY")
+ return BINARY
+
+
+def generate_h_begin(events, group):
+ if group == "root":
+ header = "trace-dtrace-root.h"
+ else:
+ header = "trace-dtrace-%s.h" % group
+
+ # Workaround for ust backend, which also includes <sys/sdt.h> and may
+ # require SDT_USE_VARIADIC to be defined. If dtrace includes <sys/sdt.h>
+ # first without defining SDT_USE_VARIADIC then ust breaks because the
+ # STAP_PROBEV() macro is not defined.
+ out('#ifndef SDT_USE_VARIADIC')
+ out('#define SDT_USE_VARIADIC 1')
+ out('#endif')
+
+ out('#include "%s"' % header,
+ '')
+
+ out('#undef SDT_USE_VARIADIC')
+
+ # SystemTap defines <provider>_<name>_ENABLED() but other DTrace
+ # implementations might not.
+ for e in events:
+ out('#ifndef QEMU_%(uppername)s_ENABLED',
+ '#define QEMU_%(uppername)s_ENABLED() true',
+ '#endif',
+ uppername=e.name.upper())
+
+def generate_h(event, group):
+ out(' QEMU_%(uppername)s(%(argnames)s);',
+ uppername=event.name.upper(),
+ argnames=", ".join(event.args.names()))
+
+
+def generate_h_backend_dstate(event, group):
+ out(' QEMU_%(uppername)s_ENABLED() || \\',
+ uppername=event.name.upper())
--
cgit