[PATCH v3 3/9] winedbg: Generalise packet_realloc(), rename to buffer_realloc().

[Jinoh Kang]

On 11/17/21 01:58, Rémi Bernon wrote:
> On 11/16/21 17:51, Jinoh Kang wrote:
>> Make it return void * and accept size_t as the size.
>>
>> Signed-off-by: Jinoh Kang <jinoh.kang.kr at gmail.com>
>> ---
> 
> Hi Jinoh,
> 
> I think that now winegdb has been converted to PE format, you can instead convert all Heap* allocations to standard C allocations, and use realloc directly instead of the helper.

Sounds good.

> 
> Regarding the errors, maybe add some assert calls if you like, although I don't think we usually use that or HEAP_GENERATE_EXCEPTIONS flag,

You're right.

> and instead we just consider that if allocation returned NULL it should either be handled properly, or ignored and later access will cause exceptions.

For some reason, no uses of that function checks for the error condition and just assumes that allocation always succeeds.

So there seems to be three options:

1. Don't check for allocation failure at all. This will AV the next time the packet buffer (gdbctx->{in,out}_buf) is accessed.
2. Gracefully handle all allocation failures; however, this would be out of scope of this patch serie.
3. Add a new helper called xrealloc() that terminates the process if allocation fails.

So I believe we should do (1) first, and then maybe later go (2)?

-- 
Sincerely,
Jinoh Kang