The following problem illustrates the way memory aliasing can cause unexpected program behavior. Consider the following procedure

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The following problem illustrates the way memory aliasing can cause unexpected program behavior. Consider the following procedure to swap two values:

1 2 3 4 5 67 /* Swap value x at xp with value y at yp */ void swap(long *xp, long *yp) { *xp = *xp + *yp; /*

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Computer Systems A Programmers Perspective

ISBN: 9781292101767

3rd Global Edition

Authors: Randal E. Bryant, David R. O'Hallaron

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Question Posted: Oct 31, 2023 03:12 AM

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The following problem illustrates the way memory aliasing can cause unexpected program behavior. Consider the following procedure

Question:

1 2 3 4 5 67 /* Swap value x at xp with value y at yp */ void swap (long *xp, long *yp) { *xp = *xp + *yp; /* x+y *yp *xp *xp = *xp = - */ *yp: /* x+y-y = x */ *yp; /* x+y-x = y */ } If this procedure is called with xp equal to yp, what effect will it have?

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This problem illustrates some of the subtle effects of memory aliasing As the following commented ...View the full answer

Computer Systems A Programmers Perspective

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1 2 3 4 5 67 /* Swap value x at xp with value y at yp / void swap (long xp, long yp) { xp = xp + yp; /* x+y yp xp xp = xp = - / yp: /* x+y-y = x / yp; /* x+y-x = y */ } If this procedure is called with xp equal to yp, what effect will it have?