Add Trace Hook Macros and function that returns the start of the stack.

include/FreeRTOS.h

@@ -653,6 +653,14 @@
     #define tracePOST_MOVED_TASK_TO_READY_STATE( pxTCB )
 #endif
 
+#ifndef traceMOVED_TASK_TO_DELAYED_LIST
+    #define traceMOVED_TASK_TO_DELAYED_LIST()
+#endif
+
+#ifndef traceMOVED_TASK_TO_OVERFLOW_DELAYED_LIST
+    #define traceMOVED_TASK_TO_OVERFLOW_DELAYED_LIST()
+#endif
+
 #ifndef traceQUEUE_CREATE
     #define traceQUEUE_CREATE( pxNewQueue )
 #endif
@@ -901,6 +909,18 @@
     #define traceTASK_NOTIFY_GIVE_FROM_ISR( uxIndexToNotify )
 #endif
 
+#ifndef traceISR_EXIT_TO_SCHEDULER
+    #define traceISR_EXIT_TO_SCHEDULER()
+#endif
+
+#ifndef traceISR_EXIT
+    #define traceISR_EXIT()
+#endif
+
+#ifndef traceISR_ENTER
+    #define traceISR_ENTER()
+#endif
+
 #ifndef traceSTREAM_BUFFER_CREATE_FAILED
     #define traceSTREAM_BUFFER_CREATE_FAILED( xIsMessageBuffer )
 #endif

portable/GCC/ARM_CM7/r0p1/port.c

@@ -511,14 +511,21 @@ void xPortSysTickHandler( void )
      * save and then restore the interrupt mask value as its value is already
      * known. */
     portDISABLE_INTERRUPTS();
+    traceISR_ENTER();
     {
         /* Increment the RTOS tick. */
         if( xTaskIncrementTick() != pdFALSE )
         {
+            traceISR_EXIT_TO_SCHEDULER();
+
             /* A context switch is required.  Context switching is performed in
              * the PendSV interrupt.  Pend the PendSV interrupt. */
             portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT;
         }
+        else
+        {
+            traceISR_EXIT();
+        }
     }
     portENABLE_INTERRUPTS();
 }

portable/GCC/ARM_CM7/r0p1/portmacro.h

@@ -95,8 +95,11 @@ typedef unsigned long    UBaseType_t;
 
 #define portNVIC_INT_CTRL_REG     ( *( ( volatile uint32_t * ) 0xe000ed04 ) )
 #define portNVIC_PENDSVSET_BIT    ( 1UL << 28UL )
-#define portEND_SWITCHING_ISR( xSwitchRequired )    do { if( xSwitchRequired != pdFALSE ) portYIELD( ); } while( 0 )
-#define portYIELD_FROM_ISR( x )                     portEND_SWITCHING_ISR( x )
+#define portEND_SWITCHING_ISR( xSwitchRequired )                                         \
+    do { if( xSwitchRequired != pdFALSE ) { traceISR_EXIT_TO_SCHEDULER(); portYIELD(); } \
+         else { traceISR_EXIT(); }                                                       \
+    } while( 0 )
+#define portYIELD_FROM_ISR( x )    portEND_SWITCHING_ISR( x )
 /*-----------------------------------------------------------*/
 
 /* Critical section management. */

tasks.c

@@ -7577,12 +7577,14 @@ static void prvAddCurrentTaskToDelayedList( TickType_t xTicksToWait,
             {
                 /* Wake time has overflowed.  Place this item in the overflow
                  * list. */
+                traceMOVED_TASK_TO_OVERFLOW_DELAYED_LIST();
                 vListInsert( pxOverflowDelayedTaskList, &( pxCurrentTCB->xStateListItem ) );
             }
             else
             {
                 /* The wake time has not overflowed, so the current block list
                  * is used. */
+                traceMOVED_TASK_TO_DELAYED_LIST();
                 vListInsert( pxDelayedTaskList, &( pxCurrentTCB->xStateListItem ) );
 
                 /* If the task entering the blocked state was placed at the
@@ -7611,11 +7613,13 @@ static void prvAddCurrentTaskToDelayedList( TickType_t xTicksToWait,
 
         if( xTimeToWake < xConstTickCount )
         {
+            traceMOVED_TASK_TO_OVERFLOW_DELAYED_LIST();
             /* Wake time has overflowed.  Place this item in the overflow list. */
             vListInsert( pxOverflowDelayedTaskList, &( pxCurrentTCB->xStateListItem ) );
         }
         else
         {
+            traceMOVED_TASK_TO_DELAYED_LIST();
             /* The wake time has not overflowed, so the current block list is used. */
             vListInsert( pxDelayedTaskList, &( pxCurrentTCB->xStateListItem ) );