1 files changed, 47 insertions, 1 deletions
diff --git a/Source/JavaScriptCore/parser/ParserArena.cpp b/Source/JavaScriptCore/parser/ParserArena.cpp
index a27688770..c53f30753 100644
--- a/Source/JavaScriptCore/parser/ParserArena.cpp
+++ b/Source/JavaScriptCore/parser/ParserArena.cpp
@@ -27,7 +27,7 @@
 #include "ParserArena.h"
 
 #include "Nodes.h"
-#include "JSCInlines.h"
+#include <wtf/PassOwnPtr.h>
 
 namespace JSC {
 
@@ -62,6 +62,38 @@ ParserArena::~ParserArena()
     deallocateObjects();
 }
 
+bool ParserArena::contains(ParserArenaRefCounted* object) const
+{
+    return m_refCountedObjects.find(object) != notFound;
+}
+
+ParserArenaRefCounted* ParserArena::last() const
+{
+    return m_refCountedObjects.last().get();
+}
+
+void ParserArena::removeLast()
+{
+    m_refCountedObjects.removeLast();
+}
+
+void ParserArena::reset()
+{
+    // Since this code path is used only when parsing fails, it's not bothering to reuse
+    // any of the memory the arena allocated. We could improve that later if we want to
+    // efficiently reuse the same arena.
+
+    deallocateObjects();
+
+    m_freeableMemory = 0;
+    m_freeablePoolEnd = 0;
+    if (m_identifierArena)
+        m_identifierArena->clear();
+    m_freeablePools.clear();
+    m_deletableObjects.clear();
+    m_refCountedObjects.clear();
+}
+
 void ParserArena::allocateFreeablePool()
 {
     if (m_freeablePoolEnd)
@@ -73,4 +105,18 @@ void ParserArena::allocateFreeablePool()
     ASSERT(freeablePool() == pool);
 }
 
+bool ParserArena::isEmpty() const
+{
+    return !m_freeablePoolEnd
+        && (!m_identifierArena || m_identifierArena->isEmpty())
+        && m_freeablePools.isEmpty()
+        && m_deletableObjects.isEmpty()
+        && m_refCountedObjects.isEmpty();
+}
+
+void ParserArena::derefWithArena(PassRefPtr<ParserArenaRefCounted> object)
+{
+    m_refCountedObjects.append(object);
+}
+
 }