Implemented missing pieces of the debugger for ARM

src/arm/virtual-frame-arm.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 109 matching lines @@
   __ stm(db_w, sp, r1.bit() | cp.bit() | fp.bit() | lr.bit());
   // Adjust FP to point to saved FP.
   __ add(fp, sp, Operand(2 * kPointerSize));
   cgen()->allocator()->Unuse(r1);
   cgen()->allocator()->Unuse(lr);
 }
 
 
 void VirtualFrame::Exit() {
   Comment cmnt(masm(), "[ Exit JS frame");
+  // Record the location of the JS exit code for patching when setting
+  // break point.
+  __ RecordJSReturn();
+
   // Drop the execution stack down to the frame pointer and restore the caller
   // frame pointer and return address.
   __ mov(sp, fp);
   __ ldm(ia_w, sp, fp.bit() | lr.bit());
 }
 
 
 void VirtualFrame::AllocateStackSlots() {
   int count = local_count();
   if (count > 0) {
     Comment cmnt(masm(), "[ Allocate space for locals");
     Adjust(count);
       // Initialize stack slots with 'undefined' value.
     __ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
   }
   if (FLAG_check_stack) {
     __ LoadRoot(r2, Heap::kStackLimitRootIndex);
   }
   for (int i = 0; i < count; i++) {
     __ push(ip);
   }
   if (FLAG_check_stack) {
-    // Put the lr setup instruction in the delay slot.  The 'sizeof(Instr)' is
-    // added to the implicit 8 byte offset that always applies to operations
-    // with pc and gives a return address 12 bytes down.
-    masm()->add(lr, pc, Operand(sizeof(Instr)));
+    // Put the lr setup instruction in the delay slot.  The kInstrSize is added
+    // to the implicit 8 byte offset that always applies to operations with pc
+    // and gives a return address 12 bytes down.
+    masm()->add(lr, pc, Operand(Assembler::kInstrSize));
     masm()->cmp(sp, Operand(r2));
     StackCheckStub stub;
     // Call the stub if lower.
     masm()->mov(pc,
                 Operand(reinterpret_cast<intptr_t>(stub.GetCode().location()),
                         RelocInfo::CODE_TARGET),
                 LeaveCC,
                 lo);
   }
 }
@@ skipping 218 matching lines @@
   ASSERT(stack_pointer_ == element_count() - 1);
   elements_.Add(FrameElement::MemoryElement());
   stack_pointer_++;
   __ push(reg);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal