start doing final project, defined some util function
make compiler generate useful info for gen_gc
will start writing real code
almost finished my part of GC, have major_collect remains
fix a little
fix
forget to modify generated structure
use high-level function to do root travse
add more utils in gc.c and fix some problem reported when compiling
finished major collect
finished minor collect, we could test now
passed all test case under test/gc/*.java
fix a bug