On Thu, 2019-06-20 at 11:04 +0530, subhasish Karmakar wrote:
> Hi,
>
> I have an application running on embedded linux.
> After running for hours my application causes out of memory issue.
> How can I get memory leak report periodically when the application is running?
> It's a process with "while(1)" loop.
You can search leaks with valgrind while your program is running.
Different techniques can be used for that:
* Inside your code, you add calls to client requests
such as VALGRIND_DO_LEAK_CHECK
* From the shell, you can use 'vgdb' to launch
a leak search using the monitor request 'leak check'
* Using gdb+vgdb, you can also launch such a leak check.
Compared to the previous techniques, the advantage is
that you can just put breakpoints where you want, and
launch leak searches when a breakpoints is reached.
You can also explore the 'logical leaks' (increase of
memory due to still reachable memory) using the monitor
request 'who_points_at'.
Note that these leak searches can show a 'delta leak' report,
i.e. pinpoint at the new allocations since the previous leak
search.
See user manual for more details, e.g.
http://www.valgrind.org/docs/manual/mc-manual.html#mc-manual.monitor-commands
and
http://www.valgrind.org/docs/manual/manual-core-adv.html#manual-core-adv.gdbserver
Philippe
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