HP aC++/HP ANSI C Release Notes (B3901-90037; A.06.26; September 2011)

+annotate=structs (New)
The +annotate=structs option annotates the compiled binary with accesses to
C/C++ struct fields for use by other external tools such as Caliper. By default, no
annotations are added.
+check=lock (New)
The new runtime +check=lock option enables the checking of locking discipline
violations; for example, whether appropriate locks are held when threads access shared
data in applications using Posix threads. Refer the online programmer's guide for
additional detail and code example. Note that +check=lock is not enabled by
+check=all.
+check=thread (New)
The new runtime +check=thread option enables the batch-mode thread-debugging
features of HP WDB. This feature requires HP WDB 5.9 or later. The following
thread-related conditions can be detected with +check=thread:
• The thread attempts to acquire a nonrecursive mutex that it currently holds.
• The thread attempts to unlock a mutex or a read-write lock that it has not acquired.
• The thread waits (blocked) on a mutex or read-write lock that is held by a thread
with a different scheduling policy.
• Different threads non-concurrently wait on the same condition variable, but with
different associated mutexes.
• The threads terminate execution without unlocking the associated mutexes or
read-write locks.
• The thread waits on a condition variable for which the associated mutex is not
locked.
• The thread terminates execution, and the resources associated with the terminated
thread continue to exist in the application because the thread has not been joined
or detached.
• The thread uses more than the specified percentage of the stack allocated to the
thread.
The +check=thread option should only be used with multithreaded programs. It is not
enabled by +check=all.
+O[no]autopar now supported in C++ Mode (New)
The +O[no]autopar option introduced in version A.06.15 of the compiler was
supported only when compiling C or Fortran files. Version A.06.20 also supports this
option when compiling C++ files. In addition, specifying +Oautopar now implies the
-mt option.
New features in version A.06.20 29