Answered: (a) Identify the two memory management…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Question

(a) Identify the two memory management defects in the code. Point out the line numbers
where the defects occur, and explain the nature of the defects.
(b) If we introduce a naive reference counting garbage collector into the language without
other protections, would each of the defects still occur? Explain why or why not for each
case.
(c) C and C++ whose memory is managed by the programmer are notorious for their
error-prone memory management. Yet, these languages are still widely used in systems pro-
gramming due to languages with garbage collection being too slow for performance critical
components. Recently, the Rust programming language has gained popularity in systems pro-
gramming for being memory safe while maintaining good performance. Read about the Rust
programming language and briefly explain in your own words how it achieves memory
safety while maintaining good performance.

Consider the C++ code below.
1 static int *p;
2
3 void foo ()
4 {
6
6
7
8
9
10
11
12
13
14
15
16
17
18
}
int i =
P = &i;
int main()
{
}
foo ();
|||||
int *a
int b =
a = b;
=
10;
return 0;
new int ();
new int ();

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