[wasm] Embedder can control what buffers wasm compilation works on.

include/v8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 5929 matching lines @@
                                           Local<Value> data);
 
 // --- AllowCodeGenerationFromStrings callbacks ---
 
 /**
  * Callback to check if code generation from strings is allowed. See
  * Context::AllowCodeGenerationFromStrings.
  */
 typedef bool (*AllowCodeGenerationFromStringsCallback)(Local<Context> context);
 
+// --- WASM compilation callbacks ---
+
+/**
+ * Callback to check if a buffer source may be compiled to WASM, given
+ * the compilation is attempted as a promise or not.
+ */
+
+typedef bool (*AllowWasmCompileCallback)(Isolate* isolate, Local<Value> source,
+                                         bool as_promise);
+
+typedef bool (*AllowWasmInstantiateCallback)(Isolate* isolate,
+                                             Local<Value> module_or_bytes,
+                                             MaybeLocal<Value> ffi,
+                                             bool as_promise);
+
 // --- Garbage Collection Callbacks ---
 
 /**
  * Applications can register callback functions which will be called before and
  * after certain garbage collection operations.  Allocations are not allowed in
  * the callback functions, you therefore cannot manipulate objects (set or
  * delete properties for example) since it is possible such operations will
  * result in the allocation of objects.
  */
 enum GCType {
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   void SetOOMErrorHandler(OOMErrorCallback that);
 
   /**
    * Set the callback to invoke to check if code generation from
    * strings should be allowed.
    */
   void SetAllowCodeGenerationFromStringsCallback(
       AllowCodeGenerationFromStringsCallback callback);
 
   /**
+   * Set the callback to invoke to check if wasm compilation from
+   * the specified object is allowed. By default, wasm compilation
+   * is allowed.
+   *
+   * Similar for instantiate.
+   */
+  void SetAllowWasmCompileCallback(AllowWasmCompileCallback callback);
+  void SetAllowWasmInstantiateCallback(AllowWasmInstantiateCallback callback);
+
+  /**
   * Check if V8 is dead and therefore unusable.  This is the case after
   * fatal errors such as out-of-memory situations.
   */
   bool IsDead();
 
   /**
    * Adds a message listener (errors only).
    *
    * The same message listener can be added more than once and in that
    * case it will be called more than once for each message.
@@ skipping 2654 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_