Test Program for Safecopy with or without COW
How to run
==========
Test safecopy with COW:
1. Set USE_COW_SAFECOPY to 1 in /usr/src/kernel/system/do_safecopy.c
2. Type `make run` to prepare and run test.
3. When done testing, type `make clean` to clean up.
Test safecopy without COW:
1. Set USE_COW_SAFECOPY to 0 in /usr/src/kernel/system/do_safecopy.c
2. Type `make run` to prepare and run test.
3. When done testing, type `make clean` to clean up.
If you want to modify the test buffer size:
1. Modify TEST_PAGE_NUM in inc.h
2. Modify TEST_PAGE_SHIFT in inc.h
