Suppress MISRA C rule 11.3 in MISRA.md

chinglee-iot commented 1 year ago

Description

MISRA C:2012 Rule 11.3

A cast shall not be performed between a pointer to object type and apointer to a different object type

MISRA violation The rule requires not to cast a pointer to object into a pointer to a different object to prevent undefined behavior due to incorrectly aligned. To support static memory allocation,

FreeRTOS creates static type kernel objects which are aliases for kernel object type with prefix "Static" for data hiding purpose. A static kernel object type is guaranteed to have the same size and alignment with kernel object, which is checked by configASSERT. Static kernel object types include StaticEventGroup_t, StaticQueue_t, StaticStreamBuffer_t, StaticTimer_t and StaticTask_t.

The following is one of the violation example:

pxEventBits = ( EventGroup_t * ) pxEventGroupBuffer; /*lint !e740 !e9087 EventGroup_t and StaticEventGroup_t are deliberately aliased for data hiding purposes and guaranteed to have the same size and alignment requirement - checked by configASSERT(). */

Suppress in the PR

FreeRTOS supports static allocation. Suppress this rule to allow conversion of static kernel object type to internal kernel object type.

Test Steps

N/A

Checklist:

[ ] ~~I have tested my changes. No regression in existing tests.~~
[ ] ~~I have modified and/or added unit-tests to cover the code changes in this Pull Request.~~

Related Issue

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

codecov[bot] commented 1 year ago

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (f2637ba) 93.64% compared to head (09ac528) 93.64%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #857 +/- ## ======================================= Coverage 93.64% 93.64% ======================================= Files 6 6 Lines 3179 3179 Branches 885 885 ======================================= Hits 2977 2977 Misses 95 95 Partials 107 107 ``` | [Flag](https://app.codecov.io/gh/FreeRTOS/FreeRTOS-Kernel/pull/857/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=FreeRTOS) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/FreeRTOS/FreeRTOS-Kernel/pull/857/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=FreeRTOS) | `93.64% <100.00%> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=FreeRTOS#carryforward-flags-in-the-pull-request-comment) to find out more.

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