compare-ast-clang-and-cppcheck: Added script that compares the clang and cppcheck AST. For now it only checks if the SymbolDatabase contains the proper function objects.

tools/clang-ast.cpp

@@ -47,7 +47,7 @@ int main(int argc, char **argv)
             unsigned int line, column;
             clang_getPresumedLocation(location, &filename, &line, &column);
 
-            std::cout << "<" << clang_getCursorKindSpelling(clang_getCursorKind(c))
+            std::cout << "<Function" /* << clang_getCursorKindSpelling(clang_getCursorKind(c)) */
                       << " name=\"" << clang_getCursorSpelling(c) << '\"'
                       << " filename=\"" << filename << '\"'
                       << " line=\"" << line << '\"'

tools/compare-ast-clang-and-cppcheck.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+#
+# Compare the AST of Cppcheck and Clang
+#
+# Example usage:
+# cd cppcheck/tools
+# g++ `llvm-config-3.8 --cxxflags --ldflags` -lclang -o clang-ast clang-ast.cpp
+# python compare-ast-clang-and-cppcheck.py lib/token.cpp
+#
+# If you get such output:
+# - <Function...>
+# Then that means there is a missing function in the Cppcheck SymbolDatabase
+#
+import subprocess
+import sys
+sys.path.insert(0, '../addons')
+import cppcheckdata
+
+CLANG_AST = './clang-ast'
+CPPCHECK = '../cppcheck'
+
+def clang_ast(sourcefile):
+    p = subprocess.Popen([CLANG_AST,sourcefile], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    comm = p.communicate()
+    ret = []
+    for line in comm[0].split('\n'):
+        while len(line)>1 and line[-1] in ' \r\n':
+            line = line[:-1]
+        if line.find('/usr/') > 0:
+			continue
+        if line.startswith('<Function'):
+            ret.append(line)
+    ret.sort()
+    return ret
+
+
+def cppcheck_ast(sourcefile):
+    subprocess.call([CPPCHECK, '--dump', '--max-configs=1', sourcefile])
+    data = cppcheckdata.parsedump(sourcefile + '.dump')
+    cfg = data.configurations[0]
+    ret = []
+    for func in cfg.functions:
+        s = '<Function'
+        s = s + ' name="' + func.name + '"'
+        s = s + ' filename="' + func.tokenDef.file + '"'
+        s = s + ' line="' + str(func.tokenDef.linenr) + '"'
+        s = s + '/>'
+        ret.append(s)
+    for scope in cfg.scopes:
+        if scope.type != 'Function':
+            continue
+        argStart = scope.bodyStart
+        while argStart and argStart.str != '(':
+			argStart = argStart.previous
+        s = '<Function'
+        s = s + ' name="' + scope.className + '"'
+        s = s + ' filename="' + argStart.file + '"'
+        s = s + ' line="' + str(argStart.linenr) + '"'
+        s = s + '/>'
+        if s not in ret:
+            ret.append(s)
+    ret.sort()
+    return ret
+
+print('Clang AST...')
+ast1 = clang_ast(sys.argv[1])
+print('Cppcheck AST...')
+ast2 = cppcheck_ast(sys.argv[1])
+
+#for func in ast2:
+#    print(func)
+
+print('Compare...')
+for func in ast1:
+    if func not in ast2:
+		print('- ' + func)
+#for func in ast2:
+#    if func not in ast1:
+#		print('+ ' + func)