https://github.com/blanham/liballoc

liballoc - a memory allocator for hobbyist operating systems
https://github.com/blanham/liballoc

Last synced: 18 days ago
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liballoc - a memory allocator for hobbyist operating systems

• Host: GitHub
• URL: https://github.com/blanham/liballoc
• Owner: blanham
• License: other
• Created: 2013-12-13T03:57:31.000Z (almost 11 years ago)
• Default Branch: master
• Last Pushed: 2020-12-04T03:44:44.000Z (almost 4 years ago)
• Last Synced: 2024-07-31T22:56:41.126Z (3 months ago)
• Language: C
• Homepage:
• Size: 124 KB
• Stars: 189
• Watchers: 10
• Forks: 22
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
liballoc - a small memory allocator

===================================

This is liballoc, a memory allocator for hobby operating systems, originally

written by Durand. According to the original page for liballoc it was released

into the public domain, but the copy I have contains the 3 clause BSD license.

liballoc.c/h are the original release of liballoc taken from the spoon tarball

while liballoc_1_1.c/h are later versions found by detective work using Google.

Using liballoc

==============

There are 4 functions which you need to implement on your system:

	int   liballoc_lock();

	int   liballoc_unlock();

	void* liballoc_alloc(int);

	int   liballoc_free(void*,int);

1) Have a look at liballoc.h for information about what each function is 

supposed to do.

2) Have a look at linux.c for an example of how to implement the library 

on linux. 

NOTE: There are two ways to build the library:

    1) Compile the library with a new system file. For example, I've

	   left linux.c with the default distribution. It gets compiled

	   directly into the liballoc_linux.so file.

	2) Implement the functions in your application and then just

	   link against the default liballoc.so library when you compile

	   your app.

Quick Start

===========

You can simply type: "make linux" to build the linux shared

library.  Thereafter, you can link it directly into your applications

during build or afterwards by export the LD_PRELOAD environment

variable. 

To run bash with the library, for example:

    LD_PRELOAD=/full/path/to/liballoc.so bash

The above command will pre-link the library into the application,

essentially replacing the default malloc/free calls at runtime. It's

quite cool.

Originally by:

Durand Miller