suspend all threads on takeover, for duration of DR init, for all injection paths

From bruen...@google.com on October 25, 2013 14:46:17

Xref issue #1304 (closed) .

We obviously want to do this for externally-triggered attach (xref issue 38 , issue #725 ). Today's internally-triggered attach ( issue #722 (closed) ) assumes the app has called our init routine up front and that we just need to take over all the threads later.

Even for regular injection, to handle corner cases of early threads, we should suspend all the other threads for the duration of DR's init to satisfy the parts of the init process that assume there are no races.

Original issue: http://code.google.com/p/dynamorio/issues/detail?id=1305