summaryrefslogtreecommitdiffstats
path: root/compilerplugins/clang/externandnotdefined.cxx
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:51:28 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:51:28 +0000
commit940b4d1848e8c70ab7642901a68594e8016caffc (patch)
treeeb72f344ee6c3d9b80a7ecc079ea79e9fba8676d /compilerplugins/clang/externandnotdefined.cxx
parentInitial commit. (diff)
downloadlibreoffice-940b4d1848e8c70ab7642901a68594e8016caffc.tar.xz
libreoffice-940b4d1848e8c70ab7642901a68594e8016caffc.zip
Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'compilerplugins/clang/externandnotdefined.cxx')
-rw-r--r--compilerplugins/clang/externandnotdefined.cxx82
1 files changed, 82 insertions, 0 deletions
diff --git a/compilerplugins/clang/externandnotdefined.cxx b/compilerplugins/clang/externandnotdefined.cxx
new file mode 100644
index 000000000..5d65579a6
--- /dev/null
+++ b/compilerplugins/clang/externandnotdefined.cxx
@@ -0,0 +1,82 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef LO_CLANG_SHARED_PLUGINS
+
+#include <string>
+
+#include "plugin.hxx"
+
+// Having an extern prototype for a method in a module and not actually declaring that method is dodgy.
+//
+
+namespace {
+
+class ExternAndNotDefined:
+ public loplugin::FilteringPlugin<ExternAndNotDefined>
+{
+public:
+ explicit ExternAndNotDefined(loplugin::InstantiationData const & data): FilteringPlugin(data) {}
+
+ virtual void run() override { TraverseDecl(compiler.getASTContext().getTranslationUnitDecl()); }
+
+ bool VisitFunctionDecl(const FunctionDecl * decl);
+};
+
+bool ExternAndNotDefined::VisitFunctionDecl(const FunctionDecl * functionDecl) {
+ if (ignoreLocation(functionDecl)) {
+ return true;
+ }
+ if (functionDecl->isDefined() || functionDecl->isPure()
+ || (functionDecl->getLinkageAndVisibility().getLinkage()
+ != ExternalLinkage)) {
+ return true;
+ }
+ //TODO, filtering out anything template for now:
+ if (functionDecl->isDependentContext()) {
+ return true;
+ }
+ CXXRecordDecl const * r = dyn_cast<CXXRecordDecl>(functionDecl->getDeclContext());
+ if (r != nullptr && r->getTemplateSpecializationKind() != TSK_Undeclared) {
+ return true;
+ }
+ // this is the bison/flex C API, it has to be defined this way
+ std::string functionName = functionDecl->getNameAsString();
+ if (functionName == "yyerror" || functionName == "yyparse" || functionName == "yylex") {
+ return true;
+ }
+ // see vcl/unx/gtk/app/gtksys.cxx, typename conflicts prevent using the right include
+ if (functionName == "gdk_x11_screen_get_screen_number") {
+ return true;
+ }
+ if (!compiler.getSourceManager().isInMainFile(functionDecl->getLocation()))
+ {
+ return true;
+ }
+ StringRef fileName { getFilenameOfLocation(functionDecl->getLocation()) };
+ // the filters use some kind of dynamic loading stunt
+ if (loplugin::hasPathnamePrefix(fileName, SRCDIR "/filter/qa/")) {
+ return true;
+ }
+ report(
+ DiagnosticsEngine::Warning,
+ "extern prototype in main file without definition",
+ functionDecl->getLocation())
+ << functionDecl->getSourceRange();
+ return true;
+}
+
+
+loplugin::Plugin::Registration< ExternAndNotDefined > externandnotdefined("externandnotdefined");
+
+}
+
+#endif // LO_CLANG_SHARED_PLUGINS
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */