misra; implemented rule 20.8

.github/workflows/CI-cygwin.yml

@@ -43,7 +43,7 @@ jobs:
       - name: Extra test for misra
         run: |
           C:\tools\cygwin\bin\bash.exe -l -c cd %GITHUB_WORKSPACE%\addons\test
-          ..\..\cppcheck --dump --suppress=uninitvar --inline-suppr misra\misra-test.c --std=c89 --platform=unix64 && python3 ..\misra.py -verify misra\misra-test.c.dump
+          ..\..\cppcheck --dump -DDUMMY --suppress=uninitvar --inline-suppr misra\misra-test.c --std=c89 --platform=unix64 && python3 ..\misra.py -verify misra\misra-test.c.dump
           C:\tools\cygwin\bin\bash.exe -l -c cd %GITHUB_WORKSPACE%
           .\cppcheck --addon=misra --inline-suppr --enable=information --error-exitcode=1 addons\test\misra\misra-ctu-*-test.c
 

.github/workflows/CI-unixish.yml

@@ -127,7 +127,7 @@ jobs:
           ./cppcheck --addon=threadsafety --std=c++03 addons/test/threadsafety
           ./cppcheck --addon=misra --inline-suppr --enable=information --error-exitcode=1 addons/test/misra/misra-ctu-*-test.c
           cd addons/test
-          ../../cppcheck --dump --suppress=uninitvar --inline-suppr misra/misra-test.c --std=c89 --platform=unix64 && python3 ../misra.py -verify misra/misra-test.c.dump
+          ../../cppcheck --dump -DDUMMY --suppress=uninitvar --inline-suppr misra/misra-test.c --std=c89 --platform=unix64 && python3 ../misra.py -verify misra/misra-test.c.dump
 
       - name: Build GUI on ubuntu
         if: contains(matrix.os, 'ubuntu')

.github/workflows/CI-windows.yml

@@ -137,5 +137,5 @@ jobs:
         run: |
           .\cppcheck.exe --addon=misra --inline-suppr --enable=information --error-exitcode=1 addons\test\misra\misra-ctu-*-test.c
           cd addons\test
-          ..\..\cppcheck.exe --dump --suppress=uninitvar --inline-suppr misra\misra-test.c --std=c89 --platform=unix64 && python3 ..\misra.py -verify misra\misra-test.c.dump
+          ..\..\cppcheck.exe --dump -DDUMMY --suppress=uninitvar --inline-suppr misra\misra-test.c --std=c89 --platform=unix64 && python3 ..\misra.py -verify misra\misra-test.c.dump
 

.travis.yml

@@ -73,8 +73,8 @@ matrix:
         - cd addons/test
         # We'll force C89 standard to enable an additional verification for
         # rules 5.4 and 5.5 which have standard-dependent options.
-        - ${CPPCHECK} --dump --suppress=uninitvar --suppress=uninitStructMember --std=c89 misra/misra-test.c
+        - ${CPPCHECK} --dump -DDUMMY --suppress=uninitvar --suppress=uninitStructMember --std=c89 misra/misra-test.c
-        - ${CPPCHECK} --dump --suppress=uninitvar --suppress=uninitStructMember --std=c89 misra/misra-test.h
+        - ${CPPCHECK} --dump -DDUMMY --suppress=uninitvar --suppress=uninitStructMember --std=c89 misra/misra-test.h
         - python3 ../misra.py -verify misra/misra-test.c.dump
         - ${CPPCHECK} --dump misra/misra-test.cpp
         - python3 ../misra.py -verify misra/misra-test.cpp.dump

addons/cppcheckdata.py

@@ -94,6 +94,29 @@ class MacroUsage:
         )
 
 
+class PreprocessorIfCondition:
+    """
+    Information about #if/#elif conditions
+    """
+
+    file = None
+    linenr = None
+    column = None
+    E = None
+    result = None
+
+    def __init__(self, element):
+        _load_location(self, element)
+        self.E = element.get('E')
+        self.result = int(element.get('result'))
+
+    def __repr__(self):
+        attrs = ["file", "linenr", "column", "E", "result"]
+        return "{}({})".format(
+            "PreprocessorIfCondition",
+            ", ".join(("{}={}".format(a, repr(getattr(self, a))) for a in attrs))
+        )
+
 
 class ValueType:
     """
@@ -759,6 +782,7 @@ class Configuration:
         name          Name of the configuration, "" for default
         directives    List of Directive items
         macro_usage   List of used macros
+        preprocessor_if_conditions  List of preprocessor if conditions that was evaluated during preprocessing
         tokenlist     List of Token items
         scopes        List of Scope items
         functions     List of Function items
@@ -770,6 +794,7 @@ class Configuration:
     name = ''
     directives = []
     macro_usage = []
+    preprocessor_if_conditions = []
     tokenlist = []
     scopes = []
     functions = []
@@ -782,6 +807,7 @@ class Configuration:
         self.name = name
         self.directives = []
         self.macro_usage = []
+        self.preprocessor_if_conditions = []
         self.tokenlist = []
         self.scopes = []
         self.functions = []
@@ -1045,6 +1071,10 @@ class CppcheckData:
             elif node.tag == 'macro' and event == 'start':
                 cfg.macro_usage.append(MacroUsage(node))
 
+            # Preprocessor #if/#elif condition
+            elif node.tag == "if-cond" and event == 'start':
+                cfg.preprocessor_if_conditions.append(PreprocessorIfCondition(node))
+
             # Parse tokens
             elif node.tag == 'tokenlist' and event == 'start':
                 continue

addons/misra.py

@@ -3209,6 +3209,12 @@ class MisraChecker:
                         self.reportError(directive, 20, 7)
                         break
 
+    def misra_20_8(self, cfg):
+        for cond in cfg.preprocessor_if_conditions:
+            #print(cond)
+            if cond.result and cond.result not in (0,1):
+                self.reportError(cond, 20, 8)
+
     def misra_20_10(self, data):
         for directive in data.directives:
             d = Define(directive)
@@ -3884,7 +3890,8 @@ class MisraChecker:
             self.executeCheck(2003, self.misra_20_3, cfg)
             self.executeCheck(2004, self.misra_20_4, cfg)
             self.executeCheck(2005, self.misra_20_5, cfg)
-            self.executeCheck(2006, self.misra_20_7, cfg)
+            self.executeCheck(2007, self.misra_20_7, cfg)
+            self.executeCheck(2008, self.misra_20_8, cfg)
             self.executeCheck(2010, self.misra_20_10, cfg)
             self.executeCheck(2013, self.misra_20_13, cfg)
             self.executeCheck(2014, self.misra_20_14, cfg)

addons/test/misra/misra-test.c

@@ -1,6 +1,6 @@
 // To test:
 // ~/cppcheck/cppcheck --dump misra/misra-test.h --std=c89
-// ~/cppcheck/cppcheck --dump --suppress=uninitvar --inline-suppr misra/misra-test.c --std=c89 --platform=unix64 && python3 ../misra.py -verify misra/misra-test.c.dump
+// ~/cppcheck/cppcheck --dump -DDUMMY --suppress=uninitvar --inline-suppr misra/misra-test.c --std=c89 --platform=unix64 && python3 ../misra.py -verify misra/misra-test.c.dump
 
 #include "path\file.h" // 20.2
 #include "file//.h" // 20.2
@@ -1558,6 +1558,9 @@ struct { int a; } struct_20_7_s;
 
 #define MUL(a  ,b ) ( a * b ) // 20.7
 
+#if __LINE__  // 20.8
+#endif
+
 #define M_20_10(a) (#a) // 20.10
 
 #else1 // 20.13

addons/test/util.py

@@ -20,7 +20,7 @@ def find_cppcheck_binary():
 
 def dump_create(fpath, *argv):
     cppcheck_binary = find_cppcheck_binary()
-    cmd = [cppcheck_binary, "--dump", "--quiet", fpath] + list(argv)
+    cmd = [cppcheck_binary, "--dump", "-DDUMMY", "--quiet", fpath] + list(argv)
     p = subprocess.Popen(cmd)
     p.communicate()
     if p.returncode != 0:

lib/preprocessor.cpp

@@ -738,9 +738,11 @@ simplecpp::TokenList Preprocessor::preprocess(const simplecpp::TokenList &tokens
 
     simplecpp::OutputList outputList;
     std::list<simplecpp::MacroUsage> macroUsage;
+    std::list<simplecpp::IfCond> ifCond;
     simplecpp::TokenList tokens2(files);
-    simplecpp::preprocess(tokens2, tokens1, files, mTokenLists, dui, &outputList, &macroUsage);
+    simplecpp::preprocess(tokens2, tokens1, files, mTokenLists, dui, &outputList, &macroUsage, &ifCond);
     mMacroUsage = macroUsage;
+    mIfCond = ifCond;
 
     handleErrors(outputList, throwError);
 
@@ -800,6 +802,9 @@ std::string Preprocessor::getcode(const std::string &filedata, const std::string
     std::string ret;
     try {
         ret = getcode(tokens1, cfg, files, filedata.find("#file") != std::string::npos);
+        // Since "files" is a local variable the tracking info must be cleared..
+        mMacroUsage.clear();
+        mIfCond.clear();
     } catch (const simplecpp::Output &) {
         ret.clear();
     }
@@ -969,10 +974,25 @@ void Preprocessor::dump(std::ostream &out) const
                 << " usefile=\"" << macroUsage.useLocation.file() << "\""
                 << " useline=\"" << macroUsage.useLocation.line << "\""
                 << " usecolumn=\"" << macroUsage.useLocation.col << "\""
-                << " known-value=\"" << (macroUsage.macroValueKnown ? 1 : 0) << "\"/>" << std::endl;
+                << " is-known-value=\"" << (macroUsage.macroValueKnown ? "true" : "false") << "\""
+                << "/>" << std::endl;
         }
         out << "  </macro-usage>" << std::endl;
     }
+
+    if (!mIfCond.empty()) {
+        out << "  <simplecpp-if-cond>" << std::endl;
+        for (const simplecpp::IfCond &ifCond: mIfCond) {
+            out << "    <if-cond"
+                << " file=\"" << ErrorLogger::toxml(ifCond.location.file()) << "\""
+                << " line=\"" << ifCond.location.line << "\""
+                << " column=\"" << ifCond.location.col << "\""
+                << " E=\"" << ErrorLogger::toxml(ifCond.E) << "\""
+                << " result=\"" << ifCond.result << "\""
+                << "/>" << std::endl;
+        }
+        out << "  </simplecpp-if-cond>" << std::endl;
+    }
 }
 
 static const std::uint32_t crc32Table[] = {

lib/preprocessor.h

@@ -223,7 +223,9 @@ private:
     /** filename for cpp/c file - useful when reporting errors */
     std::string mFile0;
 
+    /** simplecpp tracking info */
     std::list<simplecpp::MacroUsage> mMacroUsage;
+    std::list<simplecpp::IfCond> mIfCond;
 };
 
 /// @}