lib, src: add vm.runInDebugContext()

Compiles and executes source code in V8's debugger context.  Provides
a programmatic way to get access to the debug object by executing:

    var Debug = vm.runInDebugContext('Debug');

Fixes #7886.

Reviewed-by: Trevor Norris <trev.norris@gmail.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/node_contextify.cc b/src/node_contextify.cc
index 9525e7db6..bb43536d8 100644
--- a/src/node_contextify.cc
+++ b/src/node_contextify.cc
@@ -28,6 +28,7 @@
 #include "env-inl.h"
 #include "util.h"
 #include "util-inl.h"
+#include "v8-debug.h"
 
 namespace node {
 
@@ -35,6 +36,7 @@ using v8::AccessType;
 using v8::Array;
 using v8::Boolean;
 using v8::Context;
+using v8::Debug;
 using v8::EscapableHandleScope;
 using v8::External;
 using v8::Function;
@@ -244,11 +246,25 @@ class ContextifyContext {
     function_template->InstanceTemplate()->SetInternalFieldCount(1);
     env->set_script_data_constructor_function(function_template->GetFunction());
 
+    NODE_SET_METHOD(target, "runInDebugContext", RunInDebugContext);
     NODE_SET_METHOD(target, "makeContext", MakeContext);
     NODE_SET_METHOD(target, "isContext", IsContext);
   }
 
 
+  static void RunInDebugContext(const FunctionCallbackInfo<Value>& args) {
+    HandleScope scope(args.GetIsolate());
+    Local<String> script_source(args[0]->ToString());
+    if (script_source.IsEmpty())
+      return;  // Exception pending.
+    Context::Scope context_scope(Debug::GetDebugContext());
+    Local<Script> script = Script::Compile(script_source);
+    if (script.IsEmpty())
+      return;  // Exception pending.
+    args.GetReturnValue().Set(script->Run());
+  }
+
+
   static void MakeContext(const FunctionCallbackInfo<Value>& args) {
     Environment* env = Environment::GetCurrent(args.GetIsolate());
     HandleScope scope(env->isolate());