Re: Help needed for the resolution of memory leak

From: Sasmit Utkarsh <utkarshsasmit(at)gmail(dot)com>
To: Merlin Moncure <mmoncure(at)gmail(dot)com>
Cc: pgsql-general(at)lists(dot)postgresql(dot)org
Subject: Re: Help needed for the resolution of memory leak
Date: 2024-01-18 05:58:13
Message-ID: CAM-5MT08CpF=TsUY0kQkucqNusFLxJgUPPvdUwvU70HC71DsNA@mail.gmail.com
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ok Thanks Merlin, I will go through the above specified doc and get back in
case of further questions

Regards,
Sasmit Utkarsh
+91-7674022625

On Thu, Jan 18, 2024 at 6:36 AM Merlin Moncure <mmoncure(at)gmail(dot)com> wrote:

> On Wed, Jan 17, 2024 at 1:14 PM Sasmit Utkarsh <utkarshsasmit(at)gmail(dot)com>
> wrote:
>
>> Hi Merlin et al.
>>
>> Below are some couple of observations attached as an "overview_of_code"
>> and other attachments "function_def_other_details" and leak sanitizer
>> report. Please assist with some clarifications given in overview_of_code
>> with (***). Let me know if you need any more information
>>
>
> ***How do we handle for the case clearing when PGresult object is assigned a pointer to the data of the specified field within the existing PGresult object?
> i.e when SQL_get_tpf_rw() actually completes in each iteration?
>
>
>
> It is your responsibility to close PGResult and PGConn objects. Each one created must be cleaned up. This is basic libpq usage. I suggest studying the documentation.
>
>
>
> Start here: https://www.postgresql.org/docs/current/libpq-exec.html
>
> Also Study here: https://www.postgresql.org/docs/current/libpq-example.html
>
>
> You should not reuse a pointer unless you have cleared the object first.
>
>
> ****Is the leak reported due to improper handling of the above case ? or is it due to some other flow
>
> Your leaks look mostly due to not cleaning PGResult. However, the real issue here is you need to learn basic libpq usage a little better...try writing a smaller program and see when it starts to complain about leaks.
>
>
> merlin
>
>

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