Passing a double pointer to a function

[Siddharth]

I have this code here -

custom_data_type *ptr;
ptr = custom_data_allocator();
custom_data_deallocator(&ptr);

However, cppcheck complains -

Deallocation of an auto-variable results in undefined behaviour." verbose="The deallocation of an auto-variable results in undefined behaviour. You should only free memory that has been allocated dynamically

and if i use this , it works fine -
custom_data_deallocator(ptr);

However, this is clearly wrong (i am just testing cppheck without compilation) as my deallocator function expects a double pointer.

Here is my .cfg snippet -
<memory>
<alloc>custom_data_allocator</alloc>
<dealloc>custom_data_deallocator</dealloc>
</memory>

Please let me know if am missing anything. Also, these alloc/dealloc functions are third party.

Thanks
Siddharth

[Markus Elfring]

• How do you think about to adjust the code markup in your message?
• To which software version did you refer?

[Siddharth]

• Done.
• I tried 1.83 and 1.86 versions.

[Daniel Marjamäki]

Can you please try this configuration, I don't know maybe that works:

<memory>
<alloc>custom_data_allocator</alloc>
<use>custom_data_deallocator</use>
</memory>