cppcheck/test/cfg/windows.cpp

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// Test library configuration for windows.cfg
//
// Usage:
// $ cppcheck --check-library --library=windows --enable=information --error-exitcode=1 --inline-suppr --suppress=missingIncludeSystem test/cfg/windows.cpp
// =>
// No warnings about bad library configuration, unmatched suppressions, etc. exitcode=0
//
#include <windows.h>
void validCode()
{
// Valid Semaphore usage, no leaks, valid arguments
HANDLE hSemaphore1;
hSemaphore1 = CreateSemaphore(NULL, 0, 1, NULL);
CloseHandle(hSemaphore1);
HANDLE hSemaphore2;
hSemaphore2 = CreateSemaphoreEx(NULL, 0, 1, NULL, 0, SEMAPHORE_ALL_ACCESS);
CloseHandle(hSemaphore2);
HANDLE hSemaphore3;
hSemaphore3 = OpenSemaphore(SEMAPHORE_ALL_ACCESS, TRUE, "sem");
CloseHandle(hSemaphore3);
// Valid lstrcat usage, but with warning because it is deprecated
char buf[30] = "hello world";
// cppcheck-suppress lstrcatCalled
lstrcat(buf, "test");
// Valid Mutex usage, no leaks, valid arguments
HANDLE hMutex1;
hMutex1 = CreateMutex(NULL, TRUE, NULL);
if (hMutex1) {
ReleaseMutex(hMutex);
}
CloseHandle(hMutex1);
HANDLE hMutex2;
hMutex2 = CreateMutexEx(NULL, NULL, 0, MUTEX_ALL_ACCESS);
CloseHandle(hMutex2);
HANDLE hMutex3;
hMutex3 = OpenMutex(MUTEX_ALL_ACCESS, FALSE, "sem");
CloseHandle(hMutex3);
// Valid Library usage, no leaks, valid arguments
HINSTANCE hInstLib = LoadLibrary(L"My.dll");
FreeLibrary(hInstLib);
hInstLib = LoadLibraryA("My.dll");
FreeLibrary(hInstLib);
hInstLib = LoadLibraryEx(L"My.dll", NULL, 0);
FreeLibrary(hInstLib);
hInstLib = LoadLibraryExW(L"My.dll", NULL, 0);
FreeLibrary(hInstLib);
hInstLib = ::LoadLibrary(L"My.dll");
FreeLibraryAndExitThread(hInstLib, 0);
// Valid Module usage, no leaks, valid arguments
HMODULE hModule = GetModuleHandle(L"My.dll");
FreeLibrary(hModule);
hModule = GetModuleHandle(TEXT("somedll"));
FreeLibrary(hModule);
hModule = GetModuleHandle(NULL);
FreeLibrary(hModule);
}
void bufferAccessOutOfBounds()
{
wchar_t buf[10];
// Verifying _countof macro configuration
// Valid loop over array
for (size_t i = 0; i < _countof(buf); ++i) {
buf[i] = L'\0';
}
// Wrong loop over array accessing one element past the end
for (size_t i = 0; i <= _countof(buf); ++i) {
// cppcheck-suppress arrayIndexOutOfBounds
buf[i] = L'\0';
}
}
void nullPointer()
{
HANDLE hSemaphore;
// cppcheck-suppress nullPointer
hSemaphore = OpenSemaphore(SEMAPHORE_ALL_ACCESS, FALSE, NULL);
CloseHandle(hSemaphore);
// cppcheck-suppress lstrcatCalled
// cppcheck-suppress nullPointer
lstrcat(NULL, "test");
char buf[10] = "\0";
// cppcheck-suppress lstrcatCalled
// cppcheck-suppress nullPointer
lstrcat(buf, NULL);
HANDLE hMutex;
// cppcheck-suppress nullPointer
hMutex = OpenMutex(MUTEX_ALL_ACCESS, FALSE, NULL);
CloseHandle(hMutex);
//Incorrect: 1. parameter, must not be null
// cppcheck-suppress nullPointer
FARPROC pAddr = GetProcAddress(NULL, "name");
HMODULE * phModule = NULL;
// cppcheck-suppress nullPointer
GetModuleHandleEx(0, NULL, phModule);
}
void resourceLeak_CreateSemaphoreA()
{
HANDLE hSemaphore;
// cppcheck-suppress unreadVariable
hSemaphore = CreateSemaphoreA(NULL, 0, 1, "sem1");
// cppcheck-suppress resourceLeak
}
void resourceLeak_CreateSemaphoreEx()
{
HANDLE hSemaphore;
// cppcheck-suppress unreadVariable
hSemaphore = CreateSemaphoreEx(NULL, 0, 1, NULL, 0, SEMAPHORE_ALL_ACCESS);
// cppcheck-suppress resourceLeak
}
void resourceLeak_OpenSemaphore()
{
HANDLE hSemaphore;
// cppcheck-suppress unreadVariable
hSemaphore = OpenSemaphore(SEMAPHORE_ALL_ACCESS, TRUE, "sem");
// cppcheck-suppress resourceLeak
}
void resourceLeak_CreateMutexA()
{
HANDLE hMutex;
// cppcheck-suppress unreadVariable
hMutex = CreateMutexA(NULL, TRUE, "sem1");
// cppcheck-suppress resourceLeak
}
void resourceLeak_CreateMutexEx()
{
HANDLE hMutex;
// cppcheck-suppress unreadVariable
hMutex = CreateMutexEx(NULL, "sem", 0, MUTEX_ALL_ACCESS);
// cppcheck-suppress resourceLeak
}
void resourceLeak_OpenMutex()
{
HANDLE hMutex;
// cppcheck-suppress unreadVariable
hMutex = OpenMutex(MUTEX_ALL_ACCESS, TRUE, "sem");
// cppcheck-suppress resourceLeak
}
void resourceLeak_LoadLibrary()
{
HINSTANCE hInstLib;
hInstLib = ::LoadLibrary(L"My.dll");
typedef BOOL (WINAPI *fpFunc)();
// cppcheck-suppress unreadVariable
fpFunc pFunc = GetProcAddress(hInstLib, "name");
// cppcheck-suppress resourceLeak
}
void ignoredReturnValue()
{
// cppcheck-suppress leakReturnValNotUsed
CreateSemaphoreW(NULL, 0, 1, NULL);
// cppcheck-suppress leakReturnValNotUsed
CreateSemaphoreExA(NULL, 0, 1, NULL, 0, SEMAPHORE_ALL_ACCESS);
// cppcheck-suppress leakReturnValNotUsed
OpenSemaphoreA(SEMAPHORE_ALL_ACCESS, TRUE, "sem");
// cppcheck-suppress leakReturnValNotUsed
CreateMutexW(NULL, FALSE, NULL);
// cppcheck-suppress leakReturnValNotUsed
CreateMutexExA(NULL, NULL, 1, MUTEX_ALL_ACCESS);
// cppcheck-suppress leakReturnValNotUsed
OpenMutexA(MUTEX_ALL_ACCESS, TRUE, "sem");
// cppcheck-suppress leakReturnValNotUsed
LoadLibrary(L"My.dll");
// cppcheck-suppress leakReturnValNotUsed
LoadLibraryEx(L"My.dll", NULL, 0);
HINSTANCE hInstLib = LoadLibrary(L"My.dll");
// cppcheck-suppress ignoredReturnValue
GetProcAddress(hInstLib, "name");
FreeLibrary(hInstLib);
}
void invalidFunctionArg()
{
HANDLE hSemaphore;
// cppcheck-suppress invalidFunctionArg
hSemaphore = CreateSemaphore(NULL, 0, 0, NULL);
CloseHandle(hSemaphore);
// cppcheck-suppress invalidFunctionArgBool
hSemaphore = CreateSemaphore(NULL, 0, 1, true);
CloseHandle(hSemaphore);
// cppcheck-suppress invalidFunctionArg
hSemaphore = CreateSemaphoreEx(NULL, 0, 0, NULL, 0, SEMAPHORE_ALL_ACCESS);
CloseHandle(hSemaphore);
// cppcheck-suppress invalidFunctionArg
hSemaphore = CreateSemaphoreEx(NULL, 0, 1, NULL, 1, SEMAPHORE_ALL_ACCESS);
CloseHandle(hSemaphore);
HANDLE hMutex;
// cppcheck-suppress invalidFunctionArgBool
hMutex = CreateMutex(NULL, TRUE, false);
CloseHandle(hMutex);
// cppcheck-suppress invalidFunctionArgBool
hMutex = CreateMutex(NULL, FALSE, true);
CloseHandle(hMutex);
// cppcheck-suppress invalidFunctionArg
hMutex = CreateMutexEx(NULL, NULL, 3, MUTEX_ALL_ACCESS);
CloseHandle(hMutex);
//Incorrect: 2. parameter to LoadLibraryEx() must be NULL
// cppcheck-suppress invalidFunctionArg
HINSTANCE hInstLib = LoadLibraryEx(L"My.dll", 1, 0);
FreeLibrary(hInstLib);
}
void uninitvar()
{
HANDLE hSemaphore;
// cppcheck-suppress uninitvar
CloseHandle(hSemaphore);
char buf[10];
// cppcheck-suppress lstrcatCalled
// cppcheck-suppress uninitvar
lstrcat(buf, "test");
buf[0] = '\0';
char buf2[2];
// cppcheck-suppress lstrcatCalled
// cppcheck-suppress uninitvar
lstrcat(buf, buf2);
HANDLE hMutex;
// cppcheck-suppress uninitvar
ReleaseMutex(hMutex);
// cppcheck-suppress uninitvar
CloseHandle(hMutex);
}
void allocDealloc_GetModuleHandleEx()
{
// For GetModuleHandleEx it depends on the first argument if FreeLibrary
// must be called or is not allowed to be called.
// If the first argument is GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT
// (0x00000002), a call to FreeLibrary is not allowed, otherwise it is
// necessary.
// Since this is not possible to configure at the moment cppcheck should
// accept not calling FreeLibrary and also calling it for the handle.
// TODO: Enhance cppcheck to conditionally check for alloc/dealloc issues.
// No warning because of correct FreeLibrary on 'hModule' should be issued.
HMODULE hModule1;
if (GetModuleHandleEx(0, NULL, &hModule1)) {
FreeLibrary(hModule1);
}
//This is a false negative, but it is not detected to avoid false positives.
HMODULE hModule2;
GetModuleHandleEx(0, NULL, &hModule2);
}