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-rw-r--r--qemu/scripts/tracetool/format/stap.py61
1 files changed, 61 insertions, 0 deletions
diff --git a/qemu/scripts/tracetool/format/stap.py b/qemu/scripts/tracetool/format/stap.py
new file mode 100644
index 000000000..9e780f1b0
--- /dev/null
+++ b/qemu/scripts/tracetool/format/stap.py
@@ -0,0 +1,61 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Generate .stp file (DTrace with SystemTAP only).
+"""
+
+__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
+__copyright__ = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
+__license__ = "GPL version 2 or (at your option) any later version"
+
+__maintainer__ = "Stefan Hajnoczi"
+__email__ = "stefanha@linux.vnet.ibm.com"
+
+
+from tracetool import out
+from tracetool.backend.dtrace import binary, probeprefix
+
+
+# Technically 'self' is not used by systemtap yet, but
+# they recommended we keep it in the reserved list anyway
+RESERVED_WORDS = (
+ 'break', 'catch', 'continue', 'delete', 'else', 'for',
+ 'foreach', 'function', 'global', 'if', 'in', 'limit',
+ 'long', 'next', 'probe', 'return', 'self', 'string',
+ 'try', 'while'
+ )
+
+
+def stap_escape(identifier):
+ # Append underscore to reserved keywords
+ if identifier in RESERVED_WORDS:
+ return identifier + '_'
+ return identifier
+
+
+def generate(events, backend):
+ events = [e for e in events
+ if "disable" not in e.properties]
+
+ out('/* This file is autogenerated by tracetool, do not edit. */',
+ '')
+
+ for e in events:
+ # Define prototype for probe arguments
+ out('probe %(probeprefix)s.%(name)s = process("%(binary)s").mark("%(name)s")',
+ '{',
+ probeprefix=probeprefix(),
+ name=e.name,
+ binary=binary())
+
+ i = 1
+ if len(e.args) > 0:
+ for name in e.args.names():
+ name = stap_escape(name)
+ out(' %s = $arg%d;' % (name, i))
+ i += 1
+
+ out('}')
+
+ out()