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score: Avoid NULL pointer access

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Check that the executing thread is not NULL in _Scheduler_Tick().  It
may be NULL in case the processor has an optional scheduler assigned and
the system was not able to start the processor.
This commit is contained in:
Sebastian Huber
2014-06-05 14:55:16 +02:00
parent c952ecab58
commit be3c257286
1 changed files with 3 additions and 2 deletions
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cpukit/score/include/rtems/score/schedulerimpl.h
+3 -2
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@@ -282,9 +282,10 @@ RTEMS_INLINE_ROUTINE void _Scheduler_Tick( void )
for ( cpu_index = 0 ; cpu_index < cpu_count ; ++cpu_index ) {
const Per_CPU_Control *cpu = _Per_CPU_Get_by_index( cpu_index );
const Scheduler_Control *scheduler = _Scheduler_Get_by_CPU( cpu );
Thread_Control *executing = cpu->executing;
if ( scheduler != NULL ) {
( *scheduler->Operations.tick )( scheduler, cpu->executing );
if ( scheduler != NULL && executing != NULL ) {
( *scheduler->Operations.tick )( scheduler, executing );
}
}
}