Do not expose termination exceptions to the Exception API.

src/execution.h

 // Copyright 2014 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.
 
 #ifndef V8_EXECUTION_H_
 #define V8_EXECUTION_H_
 
 #include "src/handles.h"
 
 namespace v8 {
@@ skipping 28 matching lines @@
   // a pending exception.
   //
   MUST_USE_RESULT static MaybeHandle<Object> New(Handle<JSFunction> func,
                                                  int argc,
                                                  Handle<Object> argv[]);
 
   // Call a function, just like Call(), but make sure to silently catch
   // any thrown exceptions. The return value is either the result of
   // calling the function (if caught exception is false) or the exception
   // that occurred (if caught exception is true).
-  static MaybeHandle<Object> TryCall(
-      Handle<JSFunction> func,
-      Handle<Object> receiver,
-      int argc,
-      Handle<Object> argv[],
-      Handle<Object>* exception_out = NULL);
+  // In the exception case, exception_out holds the caught exceptions, unless
+  // it is a termination exception.
+  static MaybeHandle<Object> TryCall(Handle<JSFunction> func,
+                                     Handle<Object> receiver, int argc,
+                                     Handle<Object> argv[],
+                                     MaybeHandle<Object>* exception_out = NULL);
 
   // ECMA-262 9.3
   MUST_USE_RESULT static MaybeHandle<Object> ToNumber(
       Isolate* isolate, Handle<Object> obj);
 
   // ECMA-262 9.4
   MUST_USE_RESULT static MaybeHandle<Object> ToInteger(
       Isolate* isolate, Handle<Object> obj);
 
   // ECMA-262 9.5
@@ skipping 204 matching lines @@
   friend class Isolate;
   friend class StackLimitCheck;
   friend class PostponeInterruptsScope;
 
   DISALLOW_COPY_AND_ASSIGN(StackGuard);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_EXECUTION_H_