[Qemu-devel] [PATCH] simpletrace: correctly detect pointers to strings

[Paolo Bonzini <pbonzini@redhat.com>]

The visit_type_str tracepoint takes a char**, and the simpletrace backend
incorrectly treats that as a string.  The resulting compiler warning breaks
--enable-trace-backend=simple builds (including the mingw docker target).
Fix it by rejecting pointers to pointers to char; rewrite the detection
as a regular expression for simplicity.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 scripts/tracetool/backend/simple.py | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/scripts/tracetool/backend/simple.py b/scripts/tracetool/backend/simple.py
index 9885e83..9dae646 100644
--- a/scripts/tracetool/backend/simple.py
+++ b/scripts/tracetool/backend/simple.py
@@ -14,17 +14,15 @@ __email__      = "stefanha@linux.vnet.ibm.com"
 
 
 from tracetool import out
+import re
 
 
 PUBLIC = True
+STRTYPE_RE = re.compile(r'\s*(?:const )?char\s*\*(?!\s*\*)')
 
 
 def is_string(arg):
-    strtype = ('const char*', 'char*', 'const char *', 'char *')
-    if arg.lstrip().startswith(strtype):
-        return True
-    else:
-        return False
+    return not (STRTYPE_RE.match(arg) is None)
 
 
 def generate_h_begin(events, group):
-- 
1.8.3.1