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.
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);
Have a look at liballoc.h for information about what each function is supposed to do.
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.
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:
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