Support debugger API on ARM.

runtime/vm/simulator_arm.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_ARM)
@@ skipping 487 matching lines @@
 #undef STR
 #undef XSTR
 }
 
 
 char* SimulatorDebugger::ReadLine(const char* prompt) {
   char* result = NULL;
   char line_buf[256];
   int offset = 0;
   bool keep_going = true;
-  fprintf(stdout, "%s", prompt);
-  fflush(stdout);
+  OS::Print("%s", prompt);
   while (keep_going) {
     if (fgets(line_buf, sizeof(line_buf), stdin) == NULL) {
       // fgets got an error. Just give up.
       if (result != NULL) {
         delete[] result;
       }
       return NULL;
     }
     int len = strlen(line_buf);
     if (len > 1 &&
@@ skipping 1029 matching lines @@
               if (lo_res != 0) {
                 // Collapse bits 0..31 into bit 32 so that 32-bit Z check works.
                 hi_res |= 1;
               }
               ASSERT((result == 0) == (hi_res == 0));  // Z bit
               ASSERT(((result & (1LL << 63)) != 0) == (hi_res < 0));  // N bit
               SetNZFlags(hi_res);
             }
             break;
           }
+          case 6: {
+            // Registers rd_lo, rd_hi, rn, rm are encoded as rd, rn, rm, rs.
+            // Format(instr, "smull'cond's 'rd, 'rn, 'rm, 'rs");
+            int64_t left_op  = static_cast<int32_t>(rm_val);
+            int64_t right_op = static_cast<int32_t>(rs_val);
+            int64_t result = left_op * right_op;
+            int32_t hi_res = Utils::High32Bits(result);
+            int32_t lo_res = Utils::Low32Bits(result);
+            set_register(rd, lo_res);
+            set_register(rn, hi_res);
+            if (instr->HasS()) {
+              if (lo_res != 0) {
+                // Collapse bits 0..31 into bit 32 so that 32-bit Z check works.
+                hi_res |= 1;
+              }
+              ASSERT((result == 0) == (hi_res == 0));  // Z bit
+              ASSERT(((result & (1LL << 63)) != 0) == (hi_res < 0));  // N bit
+              SetNZFlags(hi_res);
+            }
+            break;
+          }
           default: {
             UnimplementedInstruction(instr);
             break;
           }
         }
       } else {
         // synchronization primitives
         Register rd = instr->RdField();
         Register rn = instr->RnField();
         uword addr = get_register(rn);
@@ skipping 1333 matching lines @@
     set_register(kStackTraceObjectReg, bit_cast<int32_t>(raw_stacktrace));
   }
   buf->Longjmp();
 }
 
 }  // namespace dart
 
 #endif  // !defined(HOST_ARCH_ARM)
 
 #endif  // defined TARGET_ARCH_ARM