Add stub for address sanitizer.
Improve exceptions.
Leave attached processes in stopped state. Introduce explicit operation for continuation.
Add a comment.
Eliminate some excessive locking.
Get rid of more race conditions.
Properly detach traced threads.
Eliminate memory leak.
Restart syscalls on EINTR.
Fix a typo. Grab the lock.
Eliminate race condition.
Fix another race condition.
Improve tracing.
Remove debug tracing code.