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This is my solution to a "Malloc Lab" assignment given in CS 4400, Computer Solutions. For it, we were to "re-implement" malloc functionality to manage blocks of memory ourselves.
I wrote the 1,100 lines of mm.c in 55 hours over 4.5 days (out of necessity due to time constraints).
Using the given mdriver tests, the highest score anyone else had achieved was 89/100, but my implementation scores a 97.
- Jason Steck
Below is the original README for the Malloc Lab.
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# CS:APP Malloc Lab
# Handout files for students
#
# Copyright (c) 2002, R. Bryant and D. O'Hallaron, All rights reserved.
# May not be used, modified, or copied without permission.
#
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Main Files:
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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
short{1,2}-bal.rep
Two tiny tracefiles to help you get started.
Makefile
Builds the driver
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Other support files for the driver
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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
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Building and running the driver
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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