Match the following with respect to activation record fields:
A 1 → A, D; 2 → B, C
B 1 → A, C; 2 → B, D
C 1 → B, C; 2 → A, D
D 1 → B, D; 2 → A, C
Doubt:- Control link points to caller activation record.Can some one confirm?
I misunderstood you first comment as that you are suggesting a as the answer.:(
If A calls B, now according to given in question A control link points to B
but shoudn't it be B control link point to A
See https://www.cs.nmsu.edu/~rth/cs/cs471/f00/ARIs.html
"The dynamic link points to the top of the ARI of the caller." So B control link point to A.Why is this not correct?
According to question it simple says control link point to calling procedure like if A calls B then Control link from B points to A since A is calling procedure. B is called procudre so Control link to calling procedure or from called procedure.
Control link from B points to A since A is calling procedure. B is called procudre so Control link to calling procedure or from called procedure.
Always calling procedure is pointing
A control link from record A points to the previous record on the stack. The chain of control links traces the dynamic execution of the program. An access link from record A points to the record of the closest enclosing block in the program. The chain of access links traces the static structure (think: scopes) of the program.
A control link from record A points to the previous record on the stack. The chain of control links traces the dynamic execution of the program.
An access link from record A points to the record of the closest enclosing block in the program. The chain of access links traces the static structure (think: scopes) of the program.
Source: https://www.cs.hmc.edu/~benw/teaching/notes/activation.html
1 => A, C
2 => B, D