Postpone termination exceptions in debug scope.

R=yurys@chromium.org
BUG=v8:3408
LOG=Y

Review URL: https://codereview.chromium.org/353393002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22144 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/debug.cc

@@ -3074,9 +3074,12 @@ void Debug::ProcessDebugMessages(bool debug_command_only) {
 }
 
 
-DebugScope::DebugScope(Debug* debug) : debug_(debug),
+DebugScope::DebugScope(Debug* debug)
+    : debug_(debug),
       prev_(debug->debugger_entry()),
-                                       save_(debug_->isolate_) {
+      save_(debug_->isolate_),
+      no_termination_exceptons_(debug_->isolate_,
+                                StackGuard::TERMINATE_EXECUTION) {
   // Link recursive debugger entry.
   debug_->thread_local_.current_debug_scope_ = this;
 

src/debug.h

@@ -702,6 +702,7 @@ class DebugScope BASE_EMBEDDED {
   int break_id_;                   // Previous break id.
   bool failed_;                    // Did the debug context fail to load?
   SaveContext save_;               // Saves previous context.
+  PostponeInterruptsScope no_termination_exceptons_;
 };