Global cycle detection analysis.

tools/clang/blink_gc_plugin/Config.h

 // Copyright 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 file defines the names used by GC infrastructure.
 
 #ifndef TOOLS_BLINK_GC_PLUGIN_CONFIG_H_
 #define TOOLS_BLINK_GC_PLUGIN_CONFIG_H_
 
 #include "clang/AST/AST.h"
+#include "clang/AST/Attr.h"
 
 const char kNewOperatorName[] = "operator new";
 const char kCreateName[] = "create";
 const char kTraceName[] = "trace";
 const char kFinalizeName[] = "finalizeGarbageCollectedObject";
 const char kTraceAfterDispatchName[] = "traceAfterDispatch";
 const char kRegisterWeakMembersName[] = "registerWeakMembers";
 const char kHeapAllocatorName[] = "HeapAllocator";
 
 class Config {
@@ skipping 73 matching lines @@
     return name == "GarbageCollectedFinalized" ||
            name == "RefCountedGarbageCollected";
   }
 
   static bool IsGCBase(const std::string& name) {
     return name == "GarbageCollected" ||
            IsGCFinalizedBase(name) ||
            IsGCMixinBase(name);
   }
 
+  static bool IsAnnotated(clang::Decl* decl, const std::string& anno) {
+    clang::AnnotateAttr* attr = decl->getAttr<clang::AnnotateAttr>();
+    return attr && (attr->getAnnotation() == anno);
+  }
+
+  static bool IsStackAnnotated(clang::Decl* decl) {
+    return IsAnnotated(decl, "blink_stack_allocated");
+  }
+
+  static bool IsIgnoreAnnotated(clang::Decl* decl) {
+    return IsAnnotated(decl, "blink_gc_plugin_ignore");
+  }
+
+  static bool IsIgnoreCycleAnnotated(clang::Decl* decl) {
+    return IsAnnotated(decl, "blink_gc_plugin_ignore_cycle") ||
+           IsIgnoreAnnotated(decl);
+  }
+
   static bool IsVisitor(const std::string& name) { return name == "Visitor"; }
 
   static bool IsTraceMethod(clang::CXXMethodDecl* method,
                             bool* isTraceAfterDispatch = 0) {
     if (method->getNumParams() != 1)
       return false;
 
     const std::string& name = method->getNameAsString();
     if (name != kTraceName && name != kTraceAfterDispatchName)
       return false;
@@ skipping 22 matching lines @@
   }
 
   static bool EndsWith(const std::string& str, const std::string& suffix) {
     if (suffix.size() > str.size())
       return false;
     return str.compare(str.size() - suffix.size(), suffix.size(), suffix) == 0;
   }
 };
 
 #endif  // TOOLS_BLINK_GC_PLUGIN_CONFIG_H_