Add RTEMS_FATAL_SOURCE_INVALID_HEAP_FREE

An invalid heap usage such as a double free is usually a fatal error
since this indicates a use after free.  Replace the use of printk() in
free() with a fatal error.

Update #3437.

testsuites/libtests/malloc03/init.c

@@ -12,14 +12,10 @@
 #endif
 
 #include <tmacros.h>
-#include "test_support.h"
 
 const char rtems_test_name[] = "MALLOC 3";
 
-/* forward declarations to avoid warnings */
-rtems_task Init(rtems_task_argument argument);
-
-rtems_task Init(
+static rtems_task Init(
   rtems_task_argument argument
 )
 {
@@ -30,10 +26,21 @@ rtems_task Init(
   p1 = __builtin_frame_address(0);
   printf("Attempt to free stack memory\n");
   free( p1 );
+}
 
-  TEST_END();
-
-  rtems_test_exit(0);
+static void fatal_extension(
+  rtems_fatal_source source,
+  bool always_set_to_false,
+  rtems_fatal_code error
+)
+{
+  if (
+    source == RTEMS_FATAL_SOURCE_INVALID_HEAP_FREE
+      && !always_set_to_false
+      && error != 0
+  ) {
+    TEST_END();
+  }
 }
 
 /* configuration information */
@@ -42,7 +49,10 @@ rtems_task Init(
 #define CONFIGURE_APPLICATION_DOES_NOT_NEED_CLOCK_DRIVER
 
 #define CONFIGURE_MAXIMUM_TASKS             1
-#define CONFIGURE_INITIAL_EXTENSIONS RTEMS_TEST_INITIAL_EXTENSION
+
+#define CONFIGURE_INITIAL_EXTENSIONS \
+  { .fatal = fatal_extension }, \
+  RTEMS_TEST_INITIAL_EXTENSION
 
 #define CONFIGURE_RTEMS_INIT_TASKS_TABLE