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

src/ia32/full-codegen-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4474 matching lines @@
   ASSERT(!result_register().is(edx));
   __ pop(result_register());
   // Uncook return address.
   __ pop(edx);
   __ SmiUntag(edx);
   __ add(edx, Immediate(masm_->CodeObject()));
   __ jmp(edx);
 }
 
 
+void FullCodeGenerator::SavePendingMessage() {
+  ASSERT(!result_register().is(edx));
+  // Store pending message while executing finally block upon exception.
+  ExternalReference pending_message_obj =
+      ExternalReference::address_of_pending_message_obj(isolate());
+  __ mov(edx, Operand::StaticVariable(pending_message_obj));
+  __ push(edx);
+}
+
+
+void FullCodeGenerator::RestorePendingMessage() {
+  ASSERT(!result_register().is(edx));
+  // Restore pending message if cleared by executing the finally block.
+  __ pop(edx);
+  ExternalReference pending_message_obj =
+      ExternalReference::address_of_pending_message_obj(isolate());
+  __ mov(Operand::StaticVariable(pending_message_obj), edx);
+}
+
+
 #undef __
 
 #define __ ACCESS_MASM(masm())
 
 FullCodeGenerator::NestedStatement* FullCodeGenerator::TryFinally::Exit(
     int* stack_depth,
     int* context_length) {
   // The macros used here must preserve the result register.
 
   // Because the handler block contains the context of the finally
@@ skipping 13 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32