Revert "Revert "JumpToFrame refactor"" + Fix

runtime/vm/simulator_mips.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include <setjmp.h>  // NOLINT
 #include <stdlib.h>
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_MIPS)
 
@@ skipping 2461 matching lines @@
   int64_t return_value;
   if (fp_return) {
     return_value = Utils::LowHighTo64Bits(get_fregister(F0), get_fregister(F1));
   } else {
     return_value = Utils::LowHighTo64Bits(get_register(V0), get_register(V1));
   }
   return return_value;
 }
 
 
-void Simulator::Longjmp(uword pc,
-                        uword sp,
-                        uword fp,
-                        RawObject* raw_exception,
-                        RawObject* raw_stacktrace,
-                        Thread* thread) {
+void Simulator::JumpToFrame(uword pc, uword sp, uword fp, Thread* thread) {
   // Walk over all setjmp buffers (simulated --> C++ transitions)
   // and try to find the setjmp associated with the simulated stack pointer.
   SimulatorSetjmpBuffer* buf = last_setjmp_buffer();
   while (buf->link() != NULL && buf->link()->sp() <= sp) {
     buf = buf->link();
   }
   ASSERT(buf != NULL);
 
   // The C++ caller has not cleaned up the stack memory of C++ frames.
   // Prepare for unwinding frames by destroying all the stack resources
   // in the previous C++ frames.
   StackResource::Unwind(thread);
 
   // Unwind the C++ stack and continue simulation in the target frame.
   set_pc(static_cast<int32_t>(pc));
   set_register(SP, static_cast<int32_t>(sp));
   set_register(FP, static_cast<int32_t>(fp));
   set_register(THR, reinterpret_cast<int32_t>(thread));
   // Set the tag.
   thread->set_vm_tag(VMTag::kDartTagId);
   // Clear top exit frame.
   thread->set_top_exit_frame_info(0);
-
-  ASSERT(raw_exception != Object::null());
-  set_register(kExceptionObjectReg, bit_cast<int32_t>(raw_exception));
-  set_register(kStackTraceObjectReg, bit_cast<int32_t>(raw_stacktrace));
   // Restore pool pointer.
   int32_t code =
       *reinterpret_cast<int32_t*>(fp + kPcMarkerSlotFromFp * kWordSize);
   int32_t pp = *reinterpret_cast<int32_t*>(code + Code::object_pool_offset() -
                                            kHeapObjectTag);
   set_register(CODE_REG, code);
   set_register(PP, pp);
   buf->Longjmp();
 }
 
 }  // namespace dart
 
 #endif  // defined(USING_SIMULATOR)
 
 #endif  // defined TARGET_ARCH_MIPS