1 files changed, 18 insertions, 4 deletions
diff --git a/Source/JavaScriptCore/heap/CopiedBlock.h b/Source/JavaScriptCore/heap/CopiedBlock.h
index 387b2ddab..431b86c38 100644
--- a/Source/JavaScriptCore/heap/CopiedBlock.h
+++ b/Source/JavaScriptCore/heap/CopiedBlock.h
@@ -55,16 +55,30 @@ public:
 #endif
     }
 
-    char* payload()
-    {
-        return reinterpret_cast<char*>(this) + ((sizeof(CopiedBlock) + 7) & ~7);
-    }
+    char* payload();
+    size_t size();
+    size_t capacity();
 
 private:
     void* m_offset;
     uintptr_t m_isPinned;
 };
 
+inline char* CopiedBlock::payload()
+{
+    return reinterpret_cast<char*>(this) + ((sizeof(CopiedBlock) + 7) & ~7);
+}
+
+inline size_t CopiedBlock::size()
+{
+    return static_cast<size_t>(static_cast<char*>(m_offset) - payload());
+}
+
+inline size_t CopiedBlock::capacity()
+{
+    return m_allocation.size();
+}
+
 } // namespace JSC
 
 #endif