Fix the defect that Heap_1.c may waste first 8 bytes of ucHeap[]

QKCoclean · dachalco · commit 280eb768f234 · 2020-12-22T13:03:41.000-08:00
diff --git a/portable/MemMang/heap_1.c b/portable/MemMang/heap_1.c
@@ -94,7 +94,7 @@ void * pvPortMalloc( size_t xWantedSize )
         if( pucAlignedHeap == NULL )
         {
             /* Ensure the heap starts on a correctly aligned boundary. */
-            pucAlignedHeap = ( uint8_t * ) ( ( ( portPOINTER_SIZE_TYPE ) & ucHeap[ portBYTE_ALIGNMENT ] ) & ( ~( ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK ) ) );
+            pucAlignedHeap = ( uint8_t * ) ( ( ( portPOINTER_SIZE_TYPE ) & ucHeap[ portBYTE_ALIGNMENT - 1 ] ) & ( ~( ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK ) ) );
         }
 
         /* Check there is enough room left for the allocation and. */

Original file line number	Diff line number	Diff line change
`@@ -94,7 +94,7 @@ void * pvPortMalloc( size_t xWantedSize )`
`94`	`94`	`if( pucAlignedHeap == NULL )`
`95`	`95`	`{`
`96`	`96`	`/* Ensure the heap starts on a correctly aligned boundary. */`
`97`		`- pucAlignedHeap = ( uint8_t * ) ( ( ( portPOINTER_SIZE_TYPE ) & ucHeap[ portBYTE_ALIGNMENT ] ) & ( ~( ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK ) ) );`
	`97`	`+ pucAlignedHeap = ( uint8_t * ) ( ( ( portPOINTER_SIZE_TYPE ) & ucHeap[ portBYTE_ALIGNMENT - 1 ] ) & ( ~( ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK ) ) );`
`98`	`98`	`}`
`99`	`99`
`100`	`100`	`/* Check there is enough room left for the allocation and. */`