Add flag trap_on_stub_deopt. We want to be able to trap on hydrogen stub bailouts.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index d22bcb59100ddf6abd751288c422dbca189ff285..c03f218924c23405ae5ee1097ee8ea67b134e48f 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -805,7 +805,8 @@ void LCodeGen::DeoptimizeIf(Condition cc,
     return;
   }
 
-  if (FLAG_trap_on_deopt && info()->IsOptimizing()) {
+  if ((FLAG_trap_on_deopt && info()->IsOptimizing()) ||
+      (FLAG_trap_on_stub_deopt && info()->IsStub())) {

[Sven Panne, 2013/08/08 06:31:28]

To remove the copy-n-paste, please make this a predicate on CompilationInfo:

   if (info()->ShouldTrapOnDeopt()) {
      ...
   }

     __ stop("trap_on_deopt", cc);
   }