Make global eval faster by lazily computing its call position.

src/builtins.cc

 // 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.
 
 #include "src/builtins.h"
 
 #include "src/api-arguments.h"
 #include "src/api-natives.h"
 #include "src/api.h"
 #include "src/base/once.h"
@@ skipping 2049 matching lines @@
   if (native_context->allow_code_gen_from_strings()->IsFalse() &&
       !CodeGenerationFromStringsAllowed(isolate, native_context)) {
     Handle<Object> error_message =
         native_context->ErrorMessageForCodeGenerationFromStrings();
     THROW_NEW_ERROR(isolate, NewEvalError(MessageTemplate::kCodeGenFromStrings,
                                           error_message),
                     JSFunction);
   }
 
   // Compile source string in the native context.
-  StackTraceFrameIterator it(isolate);
   int eval_scope_position = 0;
   int eval_position = RelocInfo::kNoPosition;
-  Handle<SharedFunctionInfo> outer_info;
-  if (!it.done() && it.is_javascript()) {
-    FrameSummary summary = FrameSummary::GetFirst(it.javascript_frame());
-    eval_position =
-        summary.abstract_code()->SourcePosition(summary.code_offset());
-    outer_info = Handle<SharedFunctionInfo>(summary.function()->shared());
-  } else {
-    outer_info =
-        Handle<SharedFunctionInfo>(native_context->closure()->shared());
-  }
+  Handle<SharedFunctionInfo> outer_info(native_context->closure()->shared());
   return Compiler::GetFunctionFromEval(source, outer_info, native_context,
                                        SLOPPY, restriction, eval_scope_position,
                                        eval_position);
 }
 
 }  // namespace
 
 
 // ES6 section 18.2.1 eval (x)
 BUILTIN(GlobalEval) {
@@ skipping 3268 matching lines @@
 BUILTIN_LIST_T(DEFINE_BUILTIN_ACCESSOR_T)
 BUILTIN_LIST_H(DEFINE_BUILTIN_ACCESSOR_H)
 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A)
 #undef DEFINE_BUILTIN_ACCESSOR_C
 #undef DEFINE_BUILTIN_ACCESSOR_A
 #undef DEFINE_BUILTIN_ACCESSOR_T
 #undef DEFINE_BUILTIN_ACCESSOR_H
 
 }  // namespace internal
 }  // namespace v8