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Suppress MISRA C:2012 rule 21.6 for snprintf #877

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merged 15 commits into from
Dec 7, 2023
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Suppress MISRA C:2012 rule 21.6 for snprintf #877

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5455145
Suppress MISRA rule 21.6 for snprintf
Nov 2, 2023
81f6e17
Fix typo
Nov 2, 2023
336e54d
Add rule section
Nov 2, 2023
b5b57f4
Update MISRA.md description
Nov 3, 2023
cf1d7ff
Uncrustify: triggered by comment.
actions-user Nov 3, 2023
d05d0ee
Fix formatting
kar-rahul-aws Nov 3, 2023
95df31c
Merge branch 'suppress-misra-21.6' of https://github.com/chinglee-iot…
kar-rahul-aws Nov 3, 2023
66fafa5
Fix formatting error
kar-rahul-aws Nov 3, 2023
15468b8
Merge branch 'main' into suppress-misra-21.6
Skptak Nov 27, 2023
bb0a63f
Merge branch 'main' into suppress-misra-21.6
chinglee-iot Dec 4, 2023
34757fc
Merge branch 'main' into suppress-misra-21.6
aggarg Dec 6, 2023
0c42906
Merge branch 'main' into suppress-misra-21.6
chinglee-iot Dec 7, 2023
7eb108a
Merge branch 'main' into suppress-misra-21.6
aggarg Dec 7, 2023
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Code review suggestions
aggarg Dec 7, 2023
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Merge branch 'main' into suppress-misra-21.6
aggarg Dec 7, 2023
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14 changes: 13 additions & 1 deletion MISRA.md
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Expand Up @@ -31,6 +31,18 @@ _Ref 8.4.1_
a declaration in header file is not useful as the assembly code will
still need to declare it separately.

#### Rule 21.6

_Ref 21.6.1_

- MISRA C-2012 Rule 21.6: The Standard Library input/output functions shall not
be used.
This rule warns about the use of standard library input/output functions
as they might have implementation defined or undefined behavior. The
function `snprintf` is used for convenience only when `configUSE_TRACE_FACILITY`
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is set to 1 and `configUSE_STATS_FORMATTING_FUNCTIONS` is set to greater
than 0. Do not consider it to be part of the scheduler.

### MISRA configuration

Copy below content to `misra.conf` to run Coverity on FreeRTOS-Kernel.
Expand Down Expand Up @@ -69,4 +81,4 @@ Copy below content to `misra.conf` to run Coverity on FreeRTOS-Kernel.
}
]
}
```
```
18 changes: 18 additions & 0 deletions tasks.c
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Expand Up @@ -7226,6 +7226,9 @@ static void prvResetNextTaskUnblockTime( void )
{
/* Write the rest of the string. */
#if ( ( configUSE_CORE_AFFINITY == 1 ) && ( configNUMBER_OF_CORES > 1 ) )
/* MISRA Ref 21.6.1 [snprintf for utility] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#rule-216 */
/* coverity[misra_c_2012_rule_21_6_violation] */
iSnprintfReturnValue = snprintf( pcWriteBuffer,
uxBufferLength - uxConsumedBufferLength,
"\t%c\t%u\t%u\t%u\t0x%x\r\n",
Expand All @@ -7235,6 +7238,9 @@ static void prvResetNextTaskUnblockTime( void )
( unsigned int ) pxTaskStatusArray[ x ].xTaskNumber,
( unsigned int ) pxTaskStatusArray[ x ].uxCoreAffinityMask ); /*lint !e586 sprintf() allowed as this is compiled with many compilers and this is a utility function only - not part of the core kernel implementation. */
#else /* ( ( configUSE_CORE_AFFINITY == 1 ) && ( configNUMBER_OF_CORES > 1 ) ) */
/* MISRA Ref 21.6.1 [snprintf for utility] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#rule-216 */
/* coverity[misra_c_2012_rule_21_6_violation] */
iSnprintfReturnValue = snprintf( pcWriteBuffer,
uxBufferLength - uxConsumedBufferLength,
"\t%c\t%u\t%u\t%u\r\n",
Expand Down Expand Up @@ -7365,6 +7371,9 @@ static void prvResetNextTaskUnblockTime( void )
{
#ifdef portLU_PRINTF_SPECIFIER_REQUIRED
{
/* MISRA Ref 21.6.1 [snprintf for utility] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#rule-216 */
/* coverity[misra_c_2012_rule_21_6_violation] */
iSnprintfReturnValue = snprintf( pcWriteBuffer,
uxBufferLength - uxConsumedBufferLength,
"\t%lu\t\t%lu%%\r\n",
Expand All @@ -7375,6 +7384,9 @@ static void prvResetNextTaskUnblockTime( void )
{
/* sizeof( int ) == sizeof( long ) so a smaller
* printf() library can be used. */
/* MISRA Ref 21.6.1 [snprintf for utility] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#rule-216 */
/* coverity[misra_c_2012_rule_21_6_violation] */
iSnprintfReturnValue = snprintf( pcWriteBuffer,
uxBufferLength - uxConsumedBufferLength,
"\t%u\t\t%u%%\r\n",
Expand All @@ -7389,6 +7401,9 @@ static void prvResetNextTaskUnblockTime( void )
* consumed less than 1% of the total run time. */
#ifdef portLU_PRINTF_SPECIFIER_REQUIRED
{
/* MISRA Ref 21.6.1 [snprintf for utility] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#rule-216 */
/* coverity[misra_c_2012_rule_21_6_violation] */
iSnprintfReturnValue = snprintf( pcWriteBuffer,
uxBufferLength - uxConsumedBufferLength,
"\t%lu\t\t<1%%\r\n",
Expand All @@ -7398,6 +7413,9 @@ static void prvResetNextTaskUnblockTime( void )
{
/* sizeof( int ) == sizeof( long ) so a smaller
* printf() library can be used. */
/* MISRA Ref 21.6.1 [snprintf for utility] */
/* More details at: https://github.com/FreeRTOS/FreeRTOS-Kernel/blob/main/MISRA.md#rule-216 */
/* coverity[misra_c_2012_rule_21_6_violation] */
iSnprintfReturnValue = snprintf( pcWriteBuffer,
uxBufferLength - uxConsumedBufferLength,
"\t%u\t\t<1%%\r\n",
Expand Down
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