Revert "Revert "JumpToFrame refactor"" + Fix

runtime/vm/simulator_mips.cc

Index: runtime/vm/simulator_mips.cc
diff --git a/runtime/vm/simulator_mips.cc b/runtime/vm/simulator_mips.cc
index f65b9ed2da108faf53c0fd04cd40da1c797fe1a8..f3c325f9e1a2a8aee6a0ba94b8f507bdd7163e2a 100644
--- a/runtime/vm/simulator_mips.cc
+++ b/runtime/vm/simulator_mips.cc
@@ -2479,12 +2479,7 @@ int64_t Simulator::Call(int32_t entry,
 }
 
 
-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();
@@ -2507,10 +2502,6 @@ void Simulator::Longjmp(uword pc,
   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);