es that the collector be able to find and suspend
all threads potentially accessing the garbage-collected heap, and locate
any state associated with each thread that must be traced.
<P>
The functionality needed for thread support is generally implemented
in one or more files specific to the particular thread interface.
For example, somewhat portable pthread support is implemented
in <TT>pthread_support.c</tt> and <TT>pthread_stop_world.c</tt>.
The essential functionality consists of
<DL>
<DT><TT>GC_stop_wor