OP_MONITOR_ENTER.S revision a8b91c52fd8a90b784835dfe1f8898035266c4dd 
1%verify "executed"
2%verify "exception for null object"
3    /*
4     * Synchronize on an object.
5     */
6    /* monitor-enter vAA */
7    GET_OPA(a2)                            #  a2 <- AA
8    GET_VREG(a1, a2)                       #  a1 <- vAA (object)
9    move      a0, rSELF                    #  a0 <- self
10    EXPORT_PC()                            #  export PC so we can grab stack trace
11    # null object?
12    beqz      a1, common_errNullObject     #  null object, throw an exception
13    FETCH_ADVANCE_INST(1)                  #  advance rPC, load rINST
14    JAL(dvmLockObject)                     #  call(self, obj)
15    GET_INST_OPCODE(t0)                    #  extract opcode from rINST
16    GOTO_OPCODE(t0)                        #  jump to next instruction
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