WRITE_UNINIT_PTR
Writing to an uninitialized pointer
Problem
Diagnosis (at runtime)
Repair

WRITE_UNINIT_PTR

Writing to an uninitialized pointer

This error is generated whenever an uninitialized pointer is dereferenced.

Problem

This code attempts to use the value of the pointer a, even though it has not been initialized.

	1:	/*
	2:	 * File: writuptr.c
	3:	 */
	4:	main()
	5:	{
	6:		int *a;
	7:
	8:		*a = 123; 
	9:		return (0);
	10:	}

Diagnosis (at runtime)

	[writuptr.c:8] **WRITE_UNINIT_PTR**
1.	>> 		*a = 123;
	
2.		Writing to an uninitialized pointer: a

		Stack trace where the error occurred:
3.				main() writuptr.c, 8
	
4.		**Memory corrupted. Program may crash!!**

1. Source line at which the problem was detected.
2. Description of the problem and the expression that is in error.
3. Stack trace showing the function call sequence leading to the error.
4. Informational message indicating that a serious error has occurred which may cause the program to crash.

Repair

This problem is usually caused by omitting an assignment or allocation statement that would initialize a pointer. The code given, for example, could be corrected by including an assignment as shown below.

	/*
	 * File: writuptr.c (Modified)
         */
        main()
        {
             int *a, b;

             a = &b;
             *a = 123;
        }

WRITE_OVERFLOW

WRITE_WILD