Reset simulator top exit frame info when coming via long jump from a throw.

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 <math.h>  // for isnan.
 #include <setjmp.h>
 #include <stdlib.h>
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_MIPS)
@@ skipping 965 matching lines @@
       set_register(RA, icount_);
 
       // Zap floating point registers.
       int32_t zap_dvalue = icount_;
       for (int i = F0; i <= F31; i++) {
         set_fregister(static_cast<FRegister>(i), zap_dvalue);
       }
 
       // Return. Subtract to account for pc_ increment after return.
       set_pc(saved_ra - Instr::kInstrSize);
+    } else {
+      // Coming via long jump from a throw. Continue to exception handler.
+      set_top_exit_frame_info(0);
     }
   } else {
     SimulatorDebugger dbg(this);
     dbg.Stop(instr, "breakpoint");
     // Adjust for extra pc increment.
     set_pc(get_pc() - Instr::kInstrSize);
   }
 }
 
 
@@ skipping 870 matching lines @@
     set_register(kStackTraceObjectReg, bit_cast<int32_t>(raw_stacktrace));
   }
   buf->Longjmp();
 }
 
 }  // namespace dart
 
 #endif  // !defined(HOST_ARCH_MIPS)
 
 #endif  // defined TARGET_ARCH_MIPS