Correct initial POSIX signals mask

	+ Modify POSIX thread create extension to ensure expected
	  initial signal mask is provided to system threads, initial
	  tasks and threads, and inheritied by tasks and threads.
	+ Adds psxsignal07 to verify functionality when using a POSIX
	  Initialization thread and POSIX threads.
	+ Adds psxsignal08 to verify functionality when using a Classic API
	  Initialization task and Classic API tasks.

Closes #3794.

1 files changed, 14 insertions, 0 deletions

diff --git a/testsuites/psxtests/psxsignal02/init.c b/testsuites/psxtests/psxsignal02/init.c
index 1f9afc9fca..c7a9432415 100644
--- a/testsuites/psxtests/psxsignal02/init.c
+++ b/testsuites/psxtests/psxsignal02/init.c
@@ -28,6 +28,18 @@ void Install_Signal_Handler(const char *task_name);
 volatile bool      Signal_occurred;
 volatile pthread_t Signal_thread;
 
+static void block_all_signals(void)
+{
+  int               sc;
+  sigset_t          mask;
+
+  sc = sigfillset( &mask );
+  rtems_test_assert( !sc );
+
+  sc = pthread_sigmask( SIG_BLOCK, &mask, NULL );
+  rtems_test_assert( !sc );
+}
+
 void Signal_handler(
   int signo
 )
@@ -140,6 +152,8 @@ void *POSIX_Init(
 
   Signal_occurred = false;
 
+  block_all_signals();
+
   act.sa_handler = Signal_handler;
   act.sa_flags   = 0;
   sigaction( SIGUSR1, &act, NULL );