Fix #13523 CTU: Mention including cpp file for error in header

lib/check.h

@@ -102,11 +102,12 @@ class CPPCHECKLIB Check {
     /** Base class used for whole-program analysis */
     class CPPCHECKLIB FileInfo {
     public:
-        FileInfo() = default;
+        explicit FileInfo(std::string f0 = {}) : file0(std::move(f0)) {}
         virtual ~FileInfo() = default;
         virtual std::string toString() const {
             return std::string();
         }
+        std::string file0;
     };
 
     virtual FileInfo * getFileInfo(const Tokenizer& /*tokenizer*/, const Settings& /*settings*/) const {

lib/checkbufferoverrun.cpp

@@ -893,6 +893,7 @@ namespace
     /** data for multifile checking */
     class MyFileInfo : public Check::FileInfo {
     public:
+        using Check::FileInfo::FileInfo;
         /** unsafe array index usage */
         std::list<CTU::FileInfo::UnsafeUsage> unsafeArrayIndex;
 
@@ -951,7 +952,7 @@ Check::FileInfo *CheckBufferOverrun::getFileInfo(const Tokenizer &tokenizer, con
     if (unsafeArrayIndex.empty() && unsafePointerArith.empty()) {
         return nullptr;
     }
-    auto *fileInfo = new MyFileInfo;
+    auto *fileInfo = new MyFileInfo(tokenizer.list.getFiles()[0]);
     fileInfo->unsafeArrayIndex = unsafeArrayIndex;
     fileInfo->unsafePointerArith = unsafePointerArith;
     return fileInfo;
@@ -998,14 +999,15 @@ bool CheckBufferOverrun::analyseWholeProgram(const CTU::FileInfo *ctu, const std
         if (!fi)
             continue;
         for (const CTU::FileInfo::UnsafeUsage &unsafeUsage : fi->unsafeArrayIndex)
-            foundErrors |= analyseWholeProgram1(callsMap, unsafeUsage, 1, errorLogger, settings.maxCtuDepth);
+            foundErrors |= analyseWholeProgram1(callsMap, unsafeUsage, 1, errorLogger, settings.maxCtuDepth, fi->file0);
         for (const CTU::FileInfo::UnsafeUsage &unsafeUsage : fi->unsafePointerArith)
-            foundErrors |= analyseWholeProgram1(callsMap, unsafeUsage, 2, errorLogger, settings.maxCtuDepth);
+            foundErrors |= analyseWholeProgram1(callsMap, unsafeUsage, 2, errorLogger, settings.maxCtuDepth, fi->file0);
     }
     return foundErrors;
 }
 
-bool CheckBufferOverrun::analyseWholeProgram1(const std::map<std::string, std::list<const CTU::FileInfo::CallBase *>> &callsMap, const CTU::FileInfo::UnsafeUsage &unsafeUsage, int type, ErrorLogger &errorLogger, int maxCtuDepth)
+bool CheckBufferOverrun::analyseWholeProgram1(const std::map<std::string, std::list<const CTU::FileInfo::CallBase *>> &callsMap, const CTU::FileInfo::UnsafeUsage &unsafeUsage,
+                                              int type, ErrorLogger &errorLogger, int maxCtuDepth, const std::string& file0)
 {
     const CTU::FileInfo::FunctionCall *functionCall = nullptr;
 
@@ -1038,7 +1040,7 @@ bool CheckBufferOverrun::analyseWholeProgram1(const std::map<std::string, std::l
     }
 
     const ErrorMessage errorMessage(locationList,
-                                    emptyString,
+                                    file0,
                                     Severity::error,
                                     errmsg,
                                     errorId,

lib/checkbufferoverrun.h

@@ -112,7 +112,8 @@ class CPPCHECKLIB CheckBufferOverrun : public Check {
     static bool isCtuUnsafePointerArith(const Settings &settings, const Token *argtok, MathLib::bigint *offset);
 
     Check::FileInfo * loadFileInfoFromXml(const tinyxml2::XMLElement *xmlElement) const override;
-    static bool analyseWholeProgram1(const std::map<std::string, std::list<const CTU::FileInfo::CallBase *>> &callsMap, const CTU::FileInfo::UnsafeUsage &unsafeUsage, int type, ErrorLogger &errorLogger, int maxCtuDepth);
+    static bool analyseWholeProgram1(const std::map<std::string, std::list<const CTU::FileInfo::CallBase *>> &callsMap, const CTU::FileInfo::UnsafeUsage &unsafeUsage,
+                                     int type, ErrorLogger &errorLogger, int maxCtuDepth, const std::string& file0);
 
 
     static std::string myName() {

lib/checkclass.cpp

@@ -3566,6 +3566,7 @@ namespace
     /* multifile checking; one definition rule violations */
     class MyFileInfo : public Check::FileInfo {
     public:
+        using Check::FileInfo::FileInfo;
         struct NameLoc {
             std::string className;
             std::string fileName;
@@ -3662,7 +3663,7 @@ Check::FileInfo *CheckClass::getFileInfo(const Tokenizer &tokenizer, const Setti
     if (classDefinitions.empty())
         return nullptr;
 
-    auto *fileInfo = new MyFileInfo;
+    auto *fileInfo = new MyFileInfo(tokenizer.list.getFiles()[0]);
     fileInfo->classDefinitions.swap(classDefinitions);
     return fileInfo;
 }
@@ -3728,7 +3729,7 @@ bool CheckClass::analyseWholeProgram(const CTU::FileInfo *ctu, const std::list<C
             locationList.emplace_back(it->second.fileName, it->second.lineNumber, it->second.column);
 
             const ErrorMessage errmsg(std::move(locationList),
-                                      emptyString,
+                                      fi->file0,
                                       Severity::error,
                                       "$symbol:" + nameLoc.className +
                                       "\nThe one definition rule is violated, different classes/structs have the same name '$symbol'",

lib/checknullpointer.cpp

@@ -600,6 +600,7 @@ namespace
     /* data for multifile checking */
     class MyFileInfo : public Check::FileInfo {
     public:
+        using Check::FileInfo::FileInfo;
         /** function arguments that are dereferenced without checking if they are null */
         std::list<CTU::FileInfo::UnsafeUsage> unsafeUsage;
 
@@ -617,7 +618,7 @@ Check::FileInfo *CheckNullPointer::getFileInfo(const Tokenizer &tokenizer, const
     if (unsafeUsage.empty())
         return nullptr;
 
-    auto *fileInfo = new MyFileInfo;
+    auto *fileInfo = new MyFileInfo(tokenizer.list.getFiles()[0]);
     fileInfo->unsafeUsage = unsafeUsage;
     return fileInfo;
 }
@@ -667,7 +668,7 @@ bool CheckNullPointer::analyseWholeProgram(const CTU::FileInfo *ctu, const std::
                     continue;
 
                 const ErrorMessage errmsg(locationList,
-                                          emptyString,
+                                          fi->file0,
                                           warning ? Severity::warning : Severity::error,
                                           "Null pointer dereference: " + unsafeUsage.myArgumentName,
                                           "ctunullpointer",

lib/checkuninitvar.cpp

@@ -1708,6 +1708,7 @@ namespace
     /* data for multifile checking */
     class MyFileInfo : public Check::FileInfo {
     public:
+        using Check::FileInfo::FileInfo;
         /** function arguments that data are unconditionally read */
         std::list<CTU::FileInfo::UnsafeUsage> unsafeUsage;
 
@@ -1725,7 +1726,7 @@ Check::FileInfo *CheckUninitVar::getFileInfo(const Tokenizer &tokenizer, const S
     if (unsafeUsage.empty())
         return nullptr;
 
-    auto *fileInfo = new MyFileInfo;
+    auto *fileInfo = new MyFileInfo(tokenizer.list.getFiles()[0]);
     fileInfo->unsafeUsage = unsafeUsage;
     return fileInfo;
 }
@@ -1769,7 +1770,7 @@ bool CheckUninitVar::analyseWholeProgram(const CTU::FileInfo *ctu, const std::li
                 continue;
 
             const ErrorMessage errmsg(locationList,
-                                      emptyString,
+                                      fi->file0,
                                       Severity::error,
                                       "Using argument " + unsafeUsage.myArgumentName + " that points at uninitialized variable " + functionCall->callArgumentExpression,
                                       "ctuuninitvar",

test/cli/whole-program/nullpointer1.cpp

@@ -0,0 +1 @@
+#include "nullpointer1.h"

test/cli/whole-program/nullpointer1.h

@@ -0,0 +1,8 @@
+#include "nullpointer1_1.h"
+
+template<typename T>
+void f(T* p) {
+    if (sizeof(T) == 4)
+        p = nullptr;
+    g(p);
+}

test/cli/whole-program/nullpointer1_1.h

@@ -0,0 +1,4 @@
+template<typename T>
+void g(T* p) {
+    *p = 0;
+};

test/cli/whole-program_test.py

@@ -4,6 +4,7 @@
 import json
 import shutil
 from testutils import cppcheck
+import xml.etree.ElementTree as ET
 
 __script_dir = os.path.dirname(os.path.abspath(__file__))
 
@@ -358,3 +359,33 @@ def test_checkclass_project_builddir_j(tmpdir):
     build_dir = os.path.join(tmpdir, 'b1')
     os.mkdir(build_dir)
     __test_checkclass_project(tmpdir, ['-j2', '--cppcheck-build-dir={}'.format(build_dir)])
+
+def __test_nullpointer_file0(extra_args):
+    args = [
+        '-q',
+        '--xml',
+        '--error-exitcode=1',
+        'whole-program/nullpointer1.cpp'
+    ]
+
+    args += extra_args
+
+    ret, stdout, stderr = cppcheck(args, cwd=__script_dir)
+    results = ET.fromstring(stderr)
+    file0 = ''
+    for e in results.findall('errors/error'):
+        if e.attrib['id'] == 'ctunullpointer':
+            if 'file0' in e.attrib:
+                file0 = e.attrib['file0']
+    assert file0 == 'whole-program/nullpointer1.cpp'
+    assert stdout == ''
+    assert ret == 1, stdout
+
+
+def test_nullpointer_file0():
+    __test_nullpointer_file0(['-j1'])
+
+def test_nullpointer_file0_j():
+    build_dir = os.path.join(tmpdir, 'b1')
+    os.mkdir(build_dir)
+    __test_nullpointer_file0(['-j2', '--cppcheck-build-dir={}'.format(build_dir)])