Add a getter for the address and size of the code range to the pulic API

src/api.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/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 6795 matching lines @@
 }
 
 
 void v8::Isolate::SetStackLimit(uintptr_t stack_limit) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
   CHECK(stack_limit);
   isolate->stack_guard()->SetStackLimit(stack_limit);
 }
 
 
+void v8::Isolate::GetCodeRange(void** start, size_t* length_in_bytes) {
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
+  if (isolate->code_range() && isolate->code_range()->valid()) {

[Sven Panne, 2014/09/29 11:41:51]

I think the first part of the conjunction will always be true, now that we
always have initialized Isolates.

[jochen (gone - plz use gerrit), 2014/09/29 11:43:17]

no, we only create a code range on 64bit

[Sven Panne, 2014/09/29 11:48:25]

I think we *always* create a CodeRange, but it's only valid() on x64. If that's
a good overall design is another question... :-)

+    *start = isolate->code_range()->start();
+    *length_in_bytes = isolate->code_range()->size();
+  } else {
+    *start = NULL;
+    *length_in_bytes = 0;
+  }
+}
+
+
 String::Utf8Value::Utf8Value(v8::Handle<v8::Value> obj)
     : str_(NULL), length_(0) {
   i::Isolate* isolate = i::Isolate::Current();
   if (obj.IsEmpty()) return;
   ENTER_V8(isolate);
   i::HandleScope scope(isolate);
   TryCatch try_catch;
   Handle<String> str = obj->ToString();
   if (str.IsEmpty()) return;
   i::Handle<i::String> i_str = Utils::OpenHandle(*str);
@@ skipping 830 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal