Stub clang plugin to check consistency of the Blink GC infrastructure.

tools/clang/blink_gc_plugin/BlinkGCPlugin.cpp

Index: tools/clang/blink_gc_plugin/BlinkGCPlugin.cpp
diff --git a/tools/clang/blink_gc_plugin/BlinkGCPlugin.cpp b/tools/clang/blink_gc_plugin/BlinkGCPlugin.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..4cae14a8e8af6d2cab0c7b7c046f30fa606f7bba
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+++ b/tools/clang/blink_gc_plugin/BlinkGCPlugin.cpp
@@ -0,0 +1,71 @@
+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This clang plugin checks various invariants of the Blink garbage
+// collection infrastructure.
+//
+// Checks that are implemented:
+// [currently none]
+
+#include "clang/AST/AST.h"
+#include "clang/AST/ASTConsumer.h"
+#include "clang/Frontend/CompilerInstance.h"
+#include "clang/Frontend/FrontendPluginRegistry.h"
+
+using namespace clang;
+using std::string;
+
+namespace {
+
+struct BlinkGCPluginOptions {
+  BlinkGCPluginOptions() {
+  }
+};
+
+// Main class containing checks for various invariants of the Blink
+// garbage collection infrastructure.
+class BlinkGCPluginConsumer : public ASTConsumer {
+ public:
+  BlinkGCPluginConsumer(CompilerInstance& instance,
+                        const BlinkGCPluginOptions& options) {
+  }
+
+  virtual void HandleTranslationUnit(ASTContext& context) {
+    // FIXME: implement consistency checks.
+  }
+};
+
+
+class BlinkGCPluginAction : public PluginASTAction {
+ public:
+  BlinkGCPluginAction() {
+  }
+
+ protected:
+  // Overridden from PluginASTAction:
+  virtual ASTConsumer* CreateASTConsumer(CompilerInstance& instance,
+                                         llvm::StringRef ref) {
+    return new BlinkGCPluginConsumer(instance, options_);
+  }
+
+  virtual bool ParseArgs(const CompilerInstance& instance,
+                         const std::vector<string>& args) {
+    bool parsed = true;
+
+    for (size_t i = 0; i < args.size() && parsed; ++i) {
+      parsed = false;
+      llvm::errs() << "Unknown blink-gc-plugin argument: " << args[i] << "\n";
+    }
+
+    return parsed;
+  }
+
+ private:
+  BlinkGCPluginOptions options_;
+};
+
+}  // namespace
+
+static FrontendPluginRegistry::Add<BlinkGCPluginAction>
+X("blink-gc-plugin", "Check Blink GC invariants");