Preserve error message during finally block in try..finally.

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
diff --git a/src/arm/full-codegen-arm.cc b/src/arm/full-codegen-arm.cc
index 2a5887a953c8124ae817f6c464dcc4d95392f0b8..a3d85f6295a6479d567ec77ea50dd987ba03834a 100644
--- a/src/arm/full-codegen-arm.cc
+++ b/src/arm/full-codegen-arm.cc
@@ -4508,6 +4508,28 @@ void FullCodeGenerator::ExitFinallyBlock() {
 }
 
 
+void FullCodeGenerator::SavePendingMessage() {
+  ASSERT(!result_register().is(r1));
+  // Store pending message while executing finally block upon exception.
+  ExternalReference pending_message_obj =
+      ExternalReference::address_of_pending_message_obj(isolate());
+  __ mov(ip, Operand(pending_message_obj));
+  __ ldr(r1, MemOperand(ip));
+  __ push(r1);
+}
+
+
+void FullCodeGenerator::RestorePendingMessage() {
+  ASSERT(!result_register().is(r1));
+  // Restore pending message if cleared by executing the finally block.
+  __ pop(r1);
+  ExternalReference pending_message_obj =
+      ExternalReference::address_of_pending_message_obj(isolate());
+  __ mov(ip, Operand(pending_message_obj));
+  __ str(r1, MemOperand(ip));
+}
+
+
 #undef __
 
 #define __ ACCESS_MASM(masm())