Method findSymbol

src/common/os/posix/mod_loader.cpp:169–222

}

void* DlfcnModule::findSymbol(ISC_STATUS* status, const Firebird::string& symName)
{
	void* result = dlsym(module, symName.c_str());

	if (!result)
	{
		Firebird::string newSym = '_' + symName;
		result = dlsym(module, newSym.c_str());
	}

	if (!result)
	{
		makeErrorStatus(status, dlerror());
		return NULL;
	}

#ifdef HAVE_DLADDR
	Dl_info info;
	if (!dladdr(result, &info))
	{
		makeErrorStatus(status, dlerror());
		return NULL;
	}

	const auto& libraryPath = realPath.isEmpty() ? fileName : realPath;

	char symbolPathBuffer[PATH_MAX];
	const char* symbolPath = symbolPathBuffer;

	if (!realpath(info.dli_fname, symbolPathBuffer))
		symbolPath = info.dli_fname;

	const char* errText = "Actual module name does not match requested";
	if (PathUtils::isRelative(libraryPath) || PathUtils::isRelative(symbolPath))
	{
		// check only name (not path) of the library
		Firebird::PathName dummyDir, nm1, nm2;
		PathUtils::splitLastComponent(dummyDir, nm1, libraryPath);
		PathUtils::splitLastComponent(dummyDir, nm2, symbolPath);
		if (nm1 != nm2)
		{
			makeErrorStatus(status, errText);
			return NULL;
		}
	}
	else if (libraryPath != symbolPath)
	{
		makeErrorStatus(status, errText);
		return NULL;
	}
#endif

	return result;
}

bool DlfcnModule::getRealPath(const Firebird::string& anySymbol, Firebird::PathName& path)
{