Patchwork [1/4] Avoid all systemtap reserved words

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Submitter Stefan Hajnoczi
Date Nov. 16, 2012, 1:19 p.m.
Message ID <1353071965-19804-2-git-send-email-stefanha@redhat.com>
Download mbox | patch
Permalink /patch/199588/
State New
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Stefan Hajnoczi - Nov. 16, 2012, 1:19 p.m.
From: "Daniel P. Berrange" <berrange@redhat.com>

Over time various systemtap reserved words have been blacklisted
in the trace backend generator. The list is not complete though,
so there is continued risk of problems in the future. Preempt
such problems by specifying the full list of systemtap keywords
listed in its parser as identified here:

  http://sourceware.org/ml/systemtap/2012-q4/msg00157.html

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 scripts/tracetool/backend/dtrace.py | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

Patch

diff --git a/scripts/tracetool/backend/dtrace.py b/scripts/tracetool/backend/dtrace.py
index 6be7047..23c43e2 100644
--- a/scripts/tracetool/backend/dtrace.py
+++ b/scripts/tracetool/backend/dtrace.py
@@ -73,6 +73,15 @@  def d(events):
         '};')
 
 
+# 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(events):
     for e in events:
         # Define prototype for probe arguments
@@ -87,7 +96,7 @@  def stap(events):
         if len(e.args) > 0:
             for name in e.args.names():
                 # Append underscore to reserved keywords
-                if name in ('limit', 'in', 'next', 'self', 'function'):
+                if name in RESERVED_WORDS:
                     name += '_'
                 out('  %s = $arg%d;' % (name, i))
                 i += 1