Add size_t length argument to v8::ArrayBuffer::Allocator::Free.

The previous implementation of Free is a deprecated overload now.

R=mstarzinger@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=16031

Review URL: https://codereview.chromium.org/21803002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16033 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

include/v8.h

@@ -2425,10 +2425,20 @@ class V8EXPORT ArrayBuffer : public Object {
     }
 
     /**
-     * Free the memory pointed to |data|. That memory is guaranteed to be
-     * previously allocated by |Allocate|.
+     * Free the memory block of size |length|, pointed to by |data|.
+     * That memory is guaranteed to be previously allocated by |Allocate|.
      */
-    virtual void Free(void* data) = 0;
+    virtual void Free(void* data, size_t length) {
+      // Override with call to |Free(void*)| for compatibility
+      // with legacy version.
+      Free(data);
+    }
+
+    /**
+     * Deprecated. Never called directly by V8.
+     * For compatibility with legacy version of this interface.
+     */
+    virtual void Free(void* data);
   };
 
   /**

src/api.cc

@@ -3071,6 +3071,12 @@ void v8::ArrayBuffer::CheckCast(Value* that) {
 }
 
 
+void v8::ArrayBuffer::Allocator::Free(void* data) {
+  API_Fatal("v8::ArrayBuffer::Allocator::Free",
+            "Override Allocator::Free(void*, size_t)");
+}
+
+
 void v8::ArrayBufferView::CheckCast(Value* that) {
   i::Handle<i::Object> obj = Utils::OpenHandle(that);
   ApiCheck(obj->IsJSArrayBufferView(),

src/d8.cc

@@ -1635,7 +1635,13 @@ class ShellArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
   virtual void* AllocateUninitialized(size_t length) {
     return malloc(length);
   }
-  virtual void Free(void* data) { free(data); }
+  virtual void Free(void* data, size_t) { free(data); }
+  // TODO(dslomov): Remove when v8:2823 is fixed.
+  virtual void Free(void* data) {
+#ifndef V8_SHARED
+    UNREACHABLE();
+#endif
+  }
 };
 
 

src/runtime.cc

@@ -689,7 +689,9 @@ void Runtime::FreeArrayBuffer(Isolate* isolate,
   isolate->heap()->AdjustAmountOfExternalAllocatedMemory(
       -static_cast<intptr_t>(allocated_length));
   CHECK(V8::ArrayBufferAllocator() != NULL);
-  V8::ArrayBufferAllocator()->Free(phantom_array_buffer->backing_store());
+  V8::ArrayBufferAllocator()->Free(
+      phantom_array_buffer->backing_store(),
+      allocated_length);
 }
 
 

test/cctest/cctest.cc

@@ -99,9 +99,10 @@ v8::Isolate* CcTest::default_isolate_;
 
 
 class CcTestArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
- public:
   virtual void* Allocate(size_t length) { return malloc(length); }
-  virtual void Free(void* data) { free(data); }
+  virtual void Free(void* data, size_t length) { free(data); }
+  // TODO(dslomov): Remove when v8:2823 is fixed.
+  virtual void Free(void* data) { UNREACHABLE(); }
 };