# Debug using Valgrind

The Valgrind tool helps detect memory-related errors that are common in C and C++ programs. These errors can lead to crashes and unpredictable behavior, such as memory leaks and memory corruption. By default, the build includes the Valgrind tool.

## Prerequisite

Set up SSH. For instructions, see [Sign in using SSH](https://docs.qualcomm.com/bundle/publicresource/topics/80-80022-254/how_to.html#use-ssh).

## Debug with Valgrind

1. Push debug symbols to the device. For instructions, see [Configure debug symbols](https://docs.qualcomm.com/doc/80-80022-12/topic/debug_symbols.html#debug-symbols).
2. Run the following Valgrind command on the device:

valgrind --tool=memcheck --leak-check=yes --show-reachable=yes --num-callers=20 --track-fds=yes /usr/bin/tqftpserv
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    **Sample output:**

==622== Memcheck, a memory error detector

==622== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.

==622== Command: /usr/bin/tqftpserv

==622==

^C==622==

==622== Process terminating with default action of signal 2 (SIGINT)

==622==    at 0x498EF38: select (select.c:69)

==622==    by 0x4013CB: ??? (in /usr/bin/tqftpserv)

==622==    by 0x48DB1AF: (below main) (libc\_start\_call\_main.h:58)

==622==

==622== FILE DESCRIPTORS: 4 open (3 std) at exit.

==622== Open pf-42 socket 3:

==622==    at 0x49984CC: socket (syscall-template.S:120)

==622==    by 0x4891293: qrtr\_open (in /usr/lib/libqrtr.so.1.0)

==622==    by 0x40129B: ??? (in /usr/bin/tqftpserv)

==622==    by 0x48DB1AF: (below main) (libc\_start\_call\_main.h:58)

==622==

==622==

==622== HEAP SUMMARY:

==622==     in use at exit: 0 bytes in 0 blocks

==622==   total heap usage: 0 allocs, 0 frees, 0 bytes allocated

==622==

==622== All heap blocks were freed -- no leaks are possible

==622==

==622== For lists of detected and suppressed errors, rerun with: -s

==622== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)

==622== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)

For more information, see [Valgrind](https://valgrind.org/).

Last Published: May 14, 2026

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