srcanamdw/codescanner/scripts/destructor.py
changeset 1 22878952f6e2
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/srcanamdw/codescanner/scripts/destructor.py	Thu Feb 18 12:29:02 2010 +0530
@@ -0,0 +1,89 @@
+# #################################################################
+# Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+# All rights reserved.
+# 
+# Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+# 
+# * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+# * Neither the name of Nokia Corporation nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+# 
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.#
+#
+# destructor.py
+#
+# Checks : Pointer access in destructors.
+# 
+# Reason : Accessing pointers to objects in destructors without 
+# checking whether they are not NULL could result in a panic, since
+# they may not have been constructed. The pointers should be
+# checked to determine whether they are owned objects. If they are
+# not owned, they should really be references rather than pointers.
+#
+# #################################################################
+
+script = CScript("destructor")
+script.iReString = r"""
+	^\s*
+	\w+
+	\s*
+	::~
+	\s*
+	\w+
+	\(
+	"""
+script.iFileExts = ["cpp"]
+script.iCategory = KCategoryCanPanic
+script.iIgnore = KIgnoreCommentsAndQuotes
+script.iSeverity = KSeverityHigh
+
+remember = re.compile("(i[A-Z]\w*)(.+)")
+reguard = re.compile("^\s*(if|while)(.*)({|$)")
+
+def findguard(lines, currentline, destructorstartline, membername):
+	i = currentline
+	line = lines[i]
+
+	while (i > destructorstartline):
+		line = lines[i]
+		m = reguard.search(line)
+		if m:
+			index = m.group(2).find(membername)
+			if (index <> -1):
+				if (line[index - 1:index] <> "*") and (line[index + len(membername):index + len(membername) + 2] <> "->"):
+					return 1
+		i = i - 1
+
+	return 0
+
+def destructorcompare(lines, currentline, rematch, filename):
+	m = rematch.search(lines[currentline])
+	if m:
+		openbracecount = 0
+		closebracecount = 0
+		checkline = currentline
+
+		while (checkline < len(lines)):
+			line = lines[checkline]
+			openbracecount += line.count("{")
+			closebracecount += line.count("}")
+			member = remember.search(line)
+			if member and ((member.group(2)[:2] == "->") or (line[member.start()-1:member.start()] == "*" and member.group(2)[:1] <> ".")):
+				membername = member.group(1)
+				if (membername.upper()[-3:] == "ENV") or findguard(lines, checkline, currentline, membername) <> 0:
+					return 0
+				else:
+					return 1
+
+			if (openbracecount and (openbracecount - closebracecount == 0)):
+				break
+			checkline += 1
+
+	return 0
+
+script.iCompare	= destructorcompare
+scanner.AddScript(script)