fixed #12526 - corrected bailout in valueFlowConditionExpressions()…

… / restored `valueFlowBailoutIncompleteVar` in daca (#6153)

The bailout was moved out of an inner loop in
a3617fe but it kept the previous
`break`. This caused it to bail out completely instead of just skipping
the function.

References for the added defines:

https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-createeventexa#parameters
https://learn.microsoft.com/en-us/windows/win32/secauthz/well-known-sids

cfg/windows.cfg

@@ -4907,6 +4907,8 @@ HFONT CreateFont(
       <not-bool/>
     </arg>
   </function>
+  <define name="CREATE_EVENT_INITIAL_SET" value="0x00000002"/>
+  <define name="CREATE_EVENT_MANUAL_RESET" value="0x00000001"/>
   <!--HANDLE WINAPI OpenEvent(
   _In_ DWORD   dwDesiredAccess,
   _In_ BOOL    bInheritHandle,
@@ -5453,6 +5455,17 @@ HFONT CreateFont(
       <not-null/>
     </arg>
   </function>
+  <define name="SECURITY_NULL_SID_AUTHORITY" value="0"/>
+  <define name="SECURITY_WORLD_SID_AUTHORITY" value="1"/>
+  <define name="SECURITY_LOCAL_SID_AUTHORITY" value="2"/>
+  <define name="SECURITY_CREATOR_SID_AUTHORITY" value="3"/>
+  <define name="SECURITY_NT_AUTHORITY" value="5"/>
+  <define name="SECURITY_NULL_RID" value="0"/>
+  <define name="SECURITY_WORLD_RID" value="0"/>
+  <define name="SECURITY_LOCAL_RID" value="0"/>
+  <define name="SECURITY_LOCAL_LOGON_RID" value="1"/>
+  <define name="SECURITY_CREATOR_OWNER_RID" value="0"/>
+  <define name="SECURITY_CREATOR_GROUP_RID" value="1"/>
   <!--PVOID WINAPI FreeSid(_In_ PSID pSid);-->
   <function name="FreeSid">
     <noreturn>false</noreturn>

lib/tokenize.cpp

@@ -4251,7 +4251,7 @@ static bool setVarIdParseDeclaration(Token** tok, const VariableMap& variableMap
             bracket = true;
         } else if (tok2->str() == "::") {
             singleNameCount = 0;
-        } else if (tok2->str() != "*" && tok2->str() != "::" && tok2->str() != "...") {
+        } else if (tok2->str() != "*" && tok2->str() != "...") {
             break;
         }
         tok2 = tok2->next();

lib/valueflow.cpp

@@ -5334,16 +5334,19 @@ static const Scope* getLoopScope(const Token* tok)
 //
 static void valueFlowConditionExpressions(const TokenList &tokenlist, const SymbolDatabase& symboldatabase, ErrorLogger *errorLogger, const Settings &settings)
 {
-    if (settings.checkLevel == Settings::CheckLevel::normal)
+    if (!settings.daca && (settings.checkLevel == Settings::CheckLevel::normal))
         return;
 
     for (const Scope * scope : symboldatabase.functionScopes) {
         if (const Token* incompleteTok = findIncompleteVar(scope->bodyStart, scope->bodyEnd)) {
             if (settings.debugwarnings)
                 bailoutIncompleteVar(tokenlist, errorLogger, incompleteTok, "Skipping function due to incomplete variable " + incompleteTok->str());
-            break;
+            continue;
         }
 
+        if (settings.daca && (settings.checkLevel == Settings::CheckLevel::normal))
+            continue;
+
         for (Token* tok = const_cast<Token*>(scope->bodyStart); tok != scope->bodyEnd; tok = tok->next()) {
             if (!Token::simpleMatch(tok, "if ("))
                 continue;

test/CMakeLists.txt

@@ -132,6 +132,7 @@ if (BUILD_TESTS)
                         --suppress=valueFlowBailout
                         --suppress=purgedConfiguration
                         --suppress=unmatchedSuppression
+                        --suppress=checkersReport
                         ${CMAKE_CURRENT_SOURCE_DIR}/cfg/${CFG_TEST}
                 )
             endif()

test/cfg/gnu.c

@@ -387,6 +387,7 @@ void memleak_xmalloc()
 
 void memleak_mmap()
 {
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     const void * p_mmap = mmap(NULL, 1, PROT_NONE, MAP_ANONYMOUS | MAP_SHARED, -1, 0);
     printf("%p", p_mmap);
     // cppcheck-suppress memleak
@@ -466,6 +467,7 @@ int nullPointer_epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)
     //          Remove (deregister) the target file descriptor fd from the
     //          epoll instance referred to by epfd.  The event is ignored and
     //          can be NULL.
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     return epoll_ctl(epfd, EPOLL_CTL_DEL, fd, NULL);
 }
 #endif

test/cfg/googletest.cpp

@@ -50,6 +50,7 @@ TEST(test_cppcheck, cppcheck)
 // #9964 - avoid compareBoolExpressionWithInt false positive
 TEST(Test, assert_false_fp)
 {
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     ASSERT_FALSE(errno < 0);
 }
 
@@ -73,6 +74,7 @@ TEST(Test, warning_in_assert_macros)
     // cppcheck-suppress duplicateExpression
     ASSERT_GE(i, i);
 
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     unsigned int u = errno;
     // cppcheck-suppress [unsignedPositive]
     ASSERT_GE(u, 0);

test/cfg/gtk.c

@@ -302,6 +302,7 @@ void g_new0_test()
         int b;
     };
     // valid
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     struct a * pNew1 = g_new0(struct a, 5);
     printf("%p", pNew1);
     g_free(pNew1);
@@ -320,6 +321,7 @@ void g_try_new_test()
         int b;
     };
     // valid
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     struct a * pNew1 = g_try_new(struct a, 5);
     printf("%p", pNew1);
     g_free(pNew1);
@@ -337,6 +339,7 @@ void g_try_new0_test()
         int b;
     };
     // valid
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     struct a * pNew1 = g_try_new0(struct a, 5);
     printf("%p", pNew1);
     g_free(pNew1);
@@ -354,7 +357,7 @@ void g_renew_test()
     struct a {
         int b;
     };
-    // cppcheck-suppress leakReturnValNotUsed
+    // cppcheck-suppress [leakReturnValNotUsed,valueFlowBailoutIncompleteVar]
     g_renew(struct a, NULL, 1);
 
     struct a * pNew = g_new(struct a, 1);
@@ -369,7 +372,7 @@ void g_try_renew_test()
     struct a {
         int b;
     };
-    // cppcheck-suppress leakReturnValNotUsed
+    // cppcheck-suppress [leakReturnValNotUsed,valueFlowBailoutIncompleteVar]
     g_try_renew(struct a, NULL, 1);
 
     struct a * pNew = g_try_new(struct a, 1);

test/cfg/opencv2.cpp

@@ -41,6 +41,6 @@ void ignoredReturnValue()
 void memleak()
 {
     const char * pBuf = (char *)cv::fastMalloc(1000); // cppcheck-suppress cstyleCast
-    std::cout << pBuf;
+    std::cout << pBuf; // cppcheck-suppress valueFlowBailoutIncompleteVar
     // cppcheck-suppress memleak
 }

test/cfg/posix.c

@@ -1062,6 +1062,7 @@ void * memleak_mmap2() // #8327
 void memleak_getline() { // #11043
     char *line = NULL;
     size_t size = 0;
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     getline(&line, &size, stdin);
     // cppcheck-suppress memleak
     line = NULL;
@@ -1082,6 +1083,7 @@ void memleak_getline_array(FILE* stream) { // #12498
 void memleak_getdelim(int delim) {
     char *line = NULL;
     size_t size = 0;
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     getdelim(&line, &size, delim, stdin);
     // cppcheck-suppress memleak
     line = NULL;
@@ -1101,6 +1103,7 @@ void memleak_getdelim_array(FILE* stream, int delim) {
 
 void * identicalCondition_mmap(int fd, size_t size) // #9940
 {
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     void* buffer = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
     if (buffer == MAP_FAILED) {
         return NULL;
@@ -1113,6 +1116,7 @@ int munmap_no_double_free(int tofd, // #11396
                           size_t len)
 {
     int rc;
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     const void* fptr = mmap(NULL,len,PROT_READ|PROT_WRITE,MAP_SHARED,fromfd,(off_t)0);
     if (fptr == MAP_FAILED) {
         return -1;
@@ -1147,6 +1151,7 @@ void resourceLeak_fdopen(int fd)
 
 void resourceLeak_fdopen2(const char* fn) // #2767
 {
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     int fi = open(fn, O_RDONLY);
     FILE* fd = fdopen(fi, "r");
     fclose(fd);
@@ -1193,14 +1198,14 @@ void resourceLeak_socket(void)
 
 void resourceLeak_open1(void)
 {
-    // cppcheck-suppress unreadVariable
+    // cppcheck-suppress [unreadVariable,valueFlowBailoutIncompleteVar]
     int fd = open("file", O_RDWR | O_CREAT);
     // cppcheck-suppress resourceLeak
 }
 
 void resourceLeak_open2(void)
 {
-    // cppcheck-suppress unreadVariable
+    // cppcheck-suppress [unreadVariable,valueFlowBailoutIncompleteVar]
     int fd = open("file", O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
     // cppcheck-suppress resourceLeak
 }
@@ -1213,6 +1218,7 @@ void noleak(int x, int y, int z)
     closedir(p2);
     int s = socket(AF_INET,SOCK_STREAM,0);
     close(s);
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     int fd1 = open("a", O_RDWR | O_CREAT);
     close(fd1);
     int fd2 = open("a", O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
@@ -1357,7 +1363,7 @@ void timet_h(const struct timespec* ptp1)
     clockid_t clk_id1, clk_id2, clk_id3;
     // cppcheck-suppress constVariablePointer
     struct timespec* ptp;
-    // cppcheck-suppress uninitvar
+    // cppcheck-suppress [uninitvar,valueFlowBailoutIncompleteVar]
     clock_settime(CLOCK_REALTIME, ptp);
     // cppcheck-suppress uninitvar
     clock_settime(clk_id1, ptp);

test/cfg/qt.cpp

@@ -576,7 +576,7 @@ void validCode(int * pIntPtr, QString & qstrArg, double d)
 
     printf(QT_TR_NOOP("Hi"));
 
-    // cppcheck-suppress checkLibraryFunction
+    // cppcheck-suppress [checkLibraryFunction,valueFlowBailoutIncompleteVar]
     Q_DECLARE_LOGGING_CATEGORY(logging_category_test);
     QT_FORWARD_DECLARE_CLASS(forwardDeclaredClass);
     QT_FORWARD_DECLARE_STRUCT(forwardDeclaredStruct);

test/cfg/runtests.sh

@@ -27,7 +27,7 @@ CFG="$DIR"../../cfg/
 # TODO: remove missingInclude disabling when it no longer is implied by --enable=information
 # Cppcheck options
 # need to suppress unmatchedSuppression in case valueFlowBailout is not reported
-CPPCHECK_OPT='--check-library --platform=unix64 --enable=style,information --inconclusive --force --check-level=exhaustive --error-exitcode=-1 --disable=missingInclude --inline-suppr --template="{file}:{line}:{severity}:{id}:{message}" --debug-warnings --suppress=valueFlowBailout --suppress=purgedConfiguration --suppress=unmatchedSuppression'
+CPPCHECK_OPT='--check-library --platform=unix64 --enable=style,information --inconclusive --force --check-level=exhaustive --error-exitcode=-1 --disable=missingInclude --inline-suppr --template="{file}:{line}:{severity}:{id}:{message}" --debug-warnings --suppress=valueFlowBailout --suppress=purgedConfiguration --suppress=unmatchedSuppression --suppress=checkersReport'
 
 # Compiler settings
 CXX=g++

test/cfg/std.c

@@ -401,6 +401,7 @@ void nullpointer(int value)
     fp = 0;
     // No FP
     fflush(0); // If stream is a null pointer, all streams are flushed.
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     fp = freopen(0,"abc",stdin);
     fclose(fp);
     fp = NULL;
@@ -732,6 +733,7 @@ void uninitvar_fgets(void)
     char *str;
     int n;
 
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     fgets(buf,10,stdin);
 
     // cppcheck-suppress uninitvar
@@ -749,6 +751,7 @@ void uninitvar_fputc(void)
     int i;
     FILE *fp;
 
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     fputc('a', stdout);
 
     // cppcheck-suppress uninitvar
@@ -763,6 +766,7 @@ void uninitvar_fputs(void)
     const char *s;
     FILE *fp;
 
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     fputs("a", stdout);
 
     // cppcheck-suppress uninitvar
@@ -3456,6 +3460,7 @@ void invalidFunctionArg_log10(float f, double d, const long double ld)
     (void)log10f(0.0f);
     (void)log10f(1.4013e-45f); // note: calculated by nextafterf(0.0f, 1.0f);
     (void)log10f(f);
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     (void)log10f(FLT_MAX);
 
     // cppcheck-suppress invalidFunctionArg
@@ -3480,6 +3485,7 @@ void invalidFunctionArg_log(float f, double d, const long double ld)
     (void)logf(0.0f);
     (void)logf(1.4013e-45f); // note: calculated by nextafterf(0.0f, 1.0f);
     (void)logf(f);
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     (void)logf(FLT_MAX);
 
     // cppcheck-suppress invalidFunctionArg
@@ -3504,6 +3510,7 @@ void invalidFunctionArg_log2(float f, double d, const long double ld)
     (void)log2f(0.0f);
     (void)log2f(1.4013e-45f); // note: calculated by nextafterf(0.0f, 1.0f);
     (void)log2f(f);
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     (void)log2f(FLT_MAX);
 
     // cppcheck-suppress invalidFunctionArg
@@ -4973,6 +4980,7 @@ void invalidPrintfArgType_printf(void)
     // #7016
     uint8_t n = 7;
     // TODO cppcheck-suppress invalidPrintfArgType_uint
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     printf("%" PRIi16 "\n", n);
 }
 

test/cfg/std.cpp

@@ -662,8 +662,10 @@ void memleak_localtime_s(const std::time_t *restrict time, struct tm *restrict r
 {
     const time_t t = time(0);
     const struct tm* const now = new tm();
-    if (localtime_s(now, &t) == 0)
+    if (localtime_s(now, &t) == 0) {
+        // cppcheck-suppress valueFlowBailoutIncompleteVar
         std::cout << now->tm_mday << std::endl;
+    }
     // cppcheck-suppress memleak
 }
 #endif // __STDC_LIB_EXT1__
@@ -706,6 +708,7 @@ void invalidFunctionArg_std_wstring_substr(const std::wstring &str, std::size_t
     (void)str.substr(pos,-1);
     // no warning is expected for
     (void)str.substr(pos,len);
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     (void)str.substr(pos, std::wstring::npos);
 }
 
@@ -4256,28 +4259,30 @@ void nullPointer_system(const char *c)
 void uninitvar_setw(void)
 {
     int i;
-    // cppcheck-suppress uninitvar
+    // cppcheck-suppress [uninitvar,valueFlowBailoutIncompleteVar]
     std::cout << std::setw(i);
 }
 
 void uninitvar_setiosflags(void)
 {
     std::ios_base::fmtflags mask;
     // TODO cppcheck-suppress uninitvar
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     std::cout << std::setiosflags(mask); // #6987 - false negative
 }
 
 void uninitvar_resetiosflags(void)
 {
     std::ios_base::fmtflags mask;
     // TODO cppcheck-suppress uninitvar
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     std::cout << std::resetiosflags(mask); // #6987 - false negative
 }
 
 void uninitvar_setfill(void)
 {
     char c;
-    // cppcheck-suppress uninitvar
+    // cppcheck-suppress [uninitvar,valueFlowBailoutIncompleteVar]
     std::cout << std::setfill(c);
 
     wchar_t wc;
@@ -4288,14 +4293,14 @@ void uninitvar_setfill(void)
 void uninitvar_setprecision(void)
 {
     int p;
-    // cppcheck-suppress uninitvar
+    // cppcheck-suppress [uninitvar,valueFlowBailoutIncompleteVar]
     std::cout << std::setprecision(p);
 }
 
 void uninitvar_setbase(void)
 {
     int p;
-    // cppcheck-suppress uninitvar
+    // cppcheck-suppress [uninitvar,valueFlowBailoutIncompleteVar]
     std::cout << std::setbase(p);
 }
 
@@ -4732,6 +4737,7 @@ void stdbind_helper(int a)
 
 void stdbind()
 {
+    // cppcheck-suppress valueFlowBailoutIncompleteVar
     using namespace std::placeholders;
 
     // TODO cppcheck-suppress ignoredReturnValue #9369