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Malloc Lab

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based on the CS:APP Malloc Lab (c) by R.Bryant and D.O'Hallaron.

Directions to Students

In this lab you write a dynamic storage allocator for C programs.

The goal is to implement an allocator that is correct, efficient, and fast.

  1. Files:

  • mm.{c,h} Your solution malloc package. mm.c is the file that you will be handing in, and is the only file you should modify.

  • mdriver.c The malloc driver that tests your mm.c file.

  • *-bal.rep Tracefiles to test your implementation.

  • Makefile Builds the driver


Other support files for the driver:

  • config.h Configures the malloc lab driver

  • fsecs.{c,h} Wrapper function for the different timer packages

  • clock.{c,h} Routines for accessing the Pentium and Alpha cycle counters

  • fcyc.{c,h} Timer functions based on cycle counters

  • ftimer.{c,h} Timer functions based on interval timers and gettimeofday()

  • memlib.{c,h} Models the heap and sbrk function

  1. Building and running the driver

To build the driver, type "make" to the shell.

To run the driver on a tiny test trace:

unix> mdriver -V -f short1-bal.rep

The -V option prints out helpful tracing and summary information.

To get a list of the driver flags:

unix> mdriver -h

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System programming lab assignment #3

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