$ java -cp classes edu.hawaii.ics332.dcl.DynamicClassLoading 
input string

$ python dynamic_loading.py 37
dynamic_loading.py:7: SyntaxWarning: name '_sqrt' is used prior to global declaration
  global _sqrt # Make _sqrt a global entity
Attempt 1
  Trying to execute function _sqrt()
  Exception caught: Importing math
  Trying to execute function _sqrt()
6.0827625303
Attempt 2
  Trying to execute function _sqrt()
6.0827625303


$ make
gcc -fPIC -DPIC -c custom_shared_library_exit.c  -o custom_shared_library_exit.o
ld -shared -ldl -o custom_shared_library_exit.so custom_shared_library_exit.o
gcc noop.c -o noop
You can now run the noop program just like this: ./noop
Or do a 'export LD_PRELOAD=/home/esb/tmp/custom_shared_library_exit.so' before running it!
$ ./noop
I am a program that does nothing!
$ export LD_PRELOAD=/home/esb/tmp/custom_shared_library_exit.so
$ ./noop
I am a program that does nothing!
** PROGRAM TERMINATING !**
$ export LD_PRELOAD=""


$ make
gcc -fPIC -DPIC -c custom_shared_library_mem.c  -o custom_shared_library_mem.o
ld -shared -ldl -o custom_shared_library_mem.so custom_shared_library_mem.o
gcc leaky.c -o leaky
You can now run the noop program just like as ./leaky.
Or do a 'export LD_PRELOAD=/home/esb/tmp/custom_shared_library_mem.so' before running it!
$ ./leaky
$ export LD_PRELOAD=/home/esb/tmp/custom_shared_library_mem.so
$ ./leaky
Warning: your code places 10 calls to malloc, but 1 calls to free
$ export LD_PRELOAD=""