Eagerly format traces in captureStackTrace

src/messages.h

 // Copyright 2006-2008 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.
 
 // The infrastructure used for (localized) message reporting in V8.
 //
 // Note: there's a big unresolved issue about ownership of the data
 // structures used by this framework.
 
 #ifndef V8_MESSAGES_H_
@@ skipping 53 matching lines @@
 
  private:
   Isolate* isolate_;
   Handle<Object> receiver_;
   Handle<JSFunction> fun_;
   int32_t pos_ = -1;
   Handle<JSObject> wasm_obj_;
   uint32_t wasm_func_index_ = static_cast<uint32_t>(-1);
 };
 
+// Formats a textual stack trace from the given structured stack trace.
+// Note that this can call arbitrary JS code through Error.prepareStackTrace.
+MaybeHandle<Object> FormatStackTrace(Isolate* isolate, Handle<JSObject> error,
+                                     Handle<Object> stack_trace);
+
 // Determines how stack trace collection skips frames.
 enum FrameSkipMode {
   // Unconditionally skips the first frame. Used e.g. when the Error constructor
   // is called, in which case the first frame is always a BUILTIN_EXIT frame.
   SKIP_FIRST,
   // Skip all frames until a specified caller function is seen.
   SKIP_UNTIL_SEEN,
   SKIP_NONE,
 };
 
@@ skipping 466 matching lines @@
   static Handle<String> GetMessage(Isolate* isolate, Handle<Object> data);
   static base::SmartArrayPointer<char> GetLocalizedMessage(Isolate* isolate,
                                                            Handle<Object> data);
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MESSAGES_H_