Implements catch on MIPS.

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 976 matching lines @@
       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);
+      // Adjust for extra pc increment.
+      set_pc(get_pc() - Instr::kInstrSize);
     }
   } else {
     SimulatorDebugger dbg(this);
     dbg.Stop(instr, "breakpoint");
     // Adjust for extra pc increment.
     set_pc(get_pc() - Instr::kInstrSize);
   }
 }
 
 
@@ skipping 824 matching lines @@
   // Restore callee-saved registers with the original value.
   set_register(R16, r16_val);
   set_register(R17, r17_val);
   set_register(R18, r18_val);
   set_register(R19, r19_val);
   set_register(R20, r20_val);
   set_register(R21, r21_val);
   set_register(R22, r22_val);
   set_register(R23, r23_val);
 
-  // Restore the SP register and return R1:R0.
+  // Restore the SP register and return V1:V0.
   set_register(SP, sp_before_call);
   return Utils::LowHighTo64Bits(get_register(V0), get_register(V1));
 }
 
 
 void Simulator::Longjmp(uword pc,
                         uword sp,
                         uword fp,
                         RawObject* raw_exception,
                         RawObject* raw_stacktrace) {
@@ skipping 25 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