git.sur5r.net Git - freertos/blob - FreeRTOS/Source/include/stack_macros.h

   1 /*\r
   2  * FreeRTOS Kernel V10.0.0\r
   3  * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.\r
   4  *\r
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy of\r
   6  * this software and associated documentation files (the "Software"), to deal in\r
   7  * the Software without restriction, including without limitation the rights to\r
   8  * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of\r
   9  * the Software, and to permit persons to whom the Software is furnished to do so,\r
  10  * subject to the following conditions:\r
  11  *\r
  12  * The above copyright notice and this permission notice shall be included in all\r
  13  * copies or substantial portions of the Software. If you wish to use our Amazon\r
  14  * FreeRTOS name, please do so in a fair use way that does not cause confusion.\r
  15  *\r
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS\r
  18  * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR\r
  19  * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r
  20  * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
  22  *\r
  23  * http://www.FreeRTOS.org\r
  24  * http://aws.amazon.com/freertos\r
  25  *\r
  26  * 1 tab == 4 spaces!\r
  27  */\r
  28 \r
  29 #ifndef STACK_MACROS_H\r
  30 #define STACK_MACROS_H\r
  31 \r
  32 /*\r
  33  * Call the stack overflow hook function if the stack of the task being swapped\r
  34  * out is currently overflowed, or looks like it might have overflowed in the\r
  35  * past.\r
  36  *\r
  37  * Setting configCHECK_FOR_STACK_OVERFLOW to 1 will cause the macro to check\r
  38  * the current stack state only - comparing the current top of stack value to\r
  39  * the stack limit.  Setting configCHECK_FOR_STACK_OVERFLOW to greater than 1\r
  40  * will also cause the last few stack bytes to be checked to ensure the value\r
  41  * to which the bytes were set when the task was created have not been\r
  42  * overwritten.  Note this second test does not guarantee that an overflowed\r
  43  * stack will always be recognised.\r
  44  */\r
  45 \r
  46 /*-----------------------------------------------------------*/\r
  47 \r
  48 #if( ( configCHECK_FOR_STACK_OVERFLOW == 1 ) && ( portSTACK_GROWTH < 0 ) )\r
  49 \r
  50         /* Only the current stack state is to be checked. */\r
  51         #define taskCHECK_FOR_STACK_OVERFLOW()                                                                                                                          \\r
  52         {                                                                                                                                                                                                       \\r
  53                 /* Is the currently saved stack pointer within the stack limit? */                                                              \\r
  54                 if( pxCurrentTCB->pxTopOfStack <= pxCurrentTCB->pxStack )                                                                               \\r
  55                 {                                                                                                                                                                                               \\r
  56                         vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName );       \\r
  57                 }                                                                                                                                                                                               \\r
  58         }\r
  59 \r
  60 #endif /* configCHECK_FOR_STACK_OVERFLOW == 1 */\r
  61 /*-----------------------------------------------------------*/\r
  62 \r
  63 #if( ( configCHECK_FOR_STACK_OVERFLOW == 1 ) && ( portSTACK_GROWTH > 0 ) )\r
  64 \r
  65         /* Only the current stack state is to be checked. */\r
  66         #define taskCHECK_FOR_STACK_OVERFLOW()                                                                                                                          \\r
  67         {                                                                                                                                                                                                       \\r
  68                                                                                                                                                                                                                 \\r
  69                 /* Is the currently saved stack pointer within the stack limit? */                                                              \\r
  70                 if( pxCurrentTCB->pxTopOfStack >= pxCurrentTCB->pxEndOfStack )                                                                  \\r
  71                 {                                                                                                                                                                                               \\r
  72                         vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName );       \\r
  73                 }                                                                                                                                                                                               \\r
  74         }\r
  75 \r
  76 #endif /* configCHECK_FOR_STACK_OVERFLOW == 1 */\r
  77 /*-----------------------------------------------------------*/\r
  78 \r
  79 #if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH < 0 ) )\r
  80 \r
  81         #define taskCHECK_FOR_STACK_OVERFLOW()                                                                                                                          \\r
  82         {                                                                                                                                                                                                       \\r
  83                 const uint32_t * const pulStack = ( uint32_t * ) pxCurrentTCB->pxStack;                                                 \\r
  84                 const uint32_t ulCheckValue = ( uint32_t ) 0xa5a5a5a5;                                                                                  \\r
  85                                                                                                                                                                                                                 \\r
  86                 if( ( pulStack[ 0 ] != ulCheckValue ) ||                                                                                                \\r
  87                         ( pulStack[ 1 ] != ulCheckValue ) ||                                                                                            \\r
  88                         ( pulStack[ 2 ] != ulCheckValue ) ||                                                                                            \\r
  89                         ( pulStack[ 3 ] != ulCheckValue ) )                                                                                             \\r
  90                 {                                                                                                                                                                                               \\r
  91                         vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName );       \\r
  92                 }                                                                                                                                                                                               \\r
  93         }\r
  94 \r
  95 #endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */\r
  96 /*-----------------------------------------------------------*/\r
  97 \r
  98 #if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH > 0 ) )\r
  99 \r
 100         #define taskCHECK_FOR_STACK_OVERFLOW()                                                                                                                                                                                          \\r
 101         {                                                                                                                                                                                                                                                                       \\r
 102         int8_t *pcEndOfStack = ( int8_t * ) pxCurrentTCB->pxEndOfStack;                                                                                                                                         \\r
 103         static const uint8_t ucExpectedStackBytes[] = { tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \\r
 104                                                                                                         tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \\r
 105                                                                                                         tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \\r
 106                                                                                                         tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,         \\r
 107                                                                                                         tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE };       \\r
 108                                                                                                                                                                                                                                                                                 \\r
 109                                                                                                                                                                                                                                                                                 \\r
 110                 pcEndOfStack -= sizeof( ucExpectedStackBytes );                                                                                                                                                                 \\r
 111                                                                                                                                                                                                                                                                                 \\r
 112                 /* Has the extremity of the task stack ever been written over? */                                                                                                                               \\r
 113                 if( memcmp( ( void * ) pcEndOfStack, ( void * ) ucExpectedStackBytes, sizeof( ucExpectedStackBytes ) ) != 0 )                                   \\r
 114                 {                                                                                                                                                                                                                                                               \\r
 115                         vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName );                                                                       \\r
 116                 }                                                                                                                                                                                                                                                               \\r
 117         }\r
 118 \r
 119 #endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */\r
 120 /*-----------------------------------------------------------*/\r
 121 \r
 122 /* Remove stack overflow macro if not being used. */\r
 123 #ifndef taskCHECK_FOR_STACK_OVERFLOW\r
 124         #define taskCHECK_FOR_STACK_OVERFLOW()\r
 125 #endif\r
 126 \r
 127 \r
 128 \r
 129 #endif /* STACK_MACROS_H */\r
 130 \r