Allocating Memory for an Object

Object one is built out of dynamically allocated memory. Here is the start of the program that allocates the memory for one object. The address of the newly allocated memory is saved at object1. (this is roughly equivalent to a reference variable in Java.)

The symbolic address object1 corresponds to just one word of 4 bytes. The object it references will be in dynamic memory, in the heap.

          .globl   main
          .text
main:                                 # object1 = new object(); 
          li       $v0,           #   allocate 32 bytes
          
          li       $a0,           #  
          
          syscall                     #   $v0 = address of allocated block of memory
          sw       $v0,           #

          . . . . . .

          .data
object1:  .word    0
object2:  .word    0

QUESTION 21:

Fill in the blanks. (Hint: the code for the dynamic memory allocation service is 9. The argument for the service is the number of bytes to allocate.)

Answer:

Allocating Memory for an Object

QUESTION 21: