Practice Allocating Offsets to Variables within an Activation Record - 6.4.1 | Module 6: Run-time Support - The Engine of Execution | Compiler Design /Construction
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6.4.1 - Allocating Offsets to Variables within an Activation Record

Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the purpose of an activation record?

💡 Hint: Think about what data a function needs during its execution.

Question 2

Easy

How does the Frame Pointer (FP) assist in accessing variables?

💡 Hint: Consider how the FP is used in conjunction with offsets.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What does the Frame Pointer (FP) do?

  • A) Points to the start of the stack
  • B) Provides a stable reference for offsets
  • C) Manages memory allocation

💡 Hint: Consider its role in accessing variables within an activation record.

Question 2

True or False: Local variables are stored at positive offsets in an activation record.

  • True
  • False

💡 Hint: Think about how the stack grows when parameters are pushed.

Solve and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

If a function has three parameters (each needing 4 bytes) and two local variables (each needing 8 bytes), calculate the total size of the activation record including a 4-byte return address and the size needed for saved registers. Provide the offset for each variable if the FP starts at 1000.

💡 Hint: Calculate based on each variable's size and determine their respective offsets from the FP.

Question 2

Explain how the allocation of offsets in an activation record can affect recursive function calls. Use an example to illustrate.

💡 Hint: Consider how memory management ensures each generation persists its own data.

Challenge and get performance evaluation