STL Qt Creator Lubuntu

memcheck example 1: Hello World is a memcheck example shows how to check a Hello world program for, among others, memory leaks.

Download the Qt Creator project 'CppMemcheckExample1' (zip)

valgrind can be used from command line:


valgrind --leak-check=full -v --show-reachable=yes --log-file=my_log_filename.txt ./my_executable_filename

valgrind_memcheck.txt

I got the following output:


==13471== Memcheck, a memory error detector

==13471== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.

==13471== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info

==13471== Command: ../CppMemcheckExample1-build-desktop/./CppMemcheckExample1

==13471== Parent PID: 13470

==13471== 

--13471-- 

--13471-- Valgrind options:

--13471--    --suppressions=/usr/lib/valgrind/debian-libc6-dbg.supp

--13471--    --leak-check=full

--13471--    -v

--13471--    --show-reachable=yes

--13471--    --log-file=valgrind_memcheck.txt

--13471-- Contents of /proc/version:

--13471--   Linux version 2.6.38-8-generic-pae (buildd@vernadsky) (gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu3) ) #42-Ubuntu SMP Mon Apr 11 05:17:09 UTC 2011

--13471-- Arch and hwcaps: X86, x86-sse1-sse2

--13471-- Page sizes: currently 4096, max supported 4096

--13471-- Valgrind library directory: /usr/lib/valgrind

--13471-- Reading syms from /lib/i386-linux-gnu/ld-2.13.so (0x4000000)

--13471--   Considering /lib/i386-linux-gnu/ld-2.13.so ..

--13471--   .. CRC mismatch (computed 2a2c2799 wanted 1e351f1f)

--13471--   Considering /usr/lib/debug/lib/i386-linux-gnu/ld-2.13.so ..

--13471--   .. CRC is valid

--13471-- Reading syms from /home/richel/Projects/Website/CppMemcheckExample1-build-desktop/CppMemcheckExample1 (0x8048000)

--13471-- Reading syms from /usr/lib/valgrind/memcheck-x86-linux (0x38000000)

--13471--    object doesn't have a dynamic symbol table

--13471-- Reading suppressions file: /usr/lib/valgrind/debian-libc6-dbg.supp

--13471-- Reading suppressions file: /usr/lib/valgrind/default.supp

--13471-- REDIR: 0x4016a80 (index) redirected to 0x3803f82b (vgPlain_x86_linux_REDIR_FOR_index)

--13471-- Reading syms from /usr/lib/valgrind/vgpreload_core-x86-linux.so (0x4020000)

--13471-- Reading syms from /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so (0x4023000)

==13471== WARNING: new redirection conflicts with existing -- ignoring it

--13471--     new: 0x04016a80 (index               ) R-> 0x04026c78 index

--13471-- REDIR: 0x4016c20 (strlen) redirected to 0x4027048 (strlen)

--13471-- Reading syms from /usr/lib/libQtCore.so.4.7.2 (0x4043000)

--13471--   Considering /usr/lib/libQtCore.so.4.7.2 ..

--13471--   .. CRC mismatch (computed 0c8a8d9d wanted ce78deb8)

--13471--   Considering /usr/lib/debug/usr/lib/libQtCore.so.4.7.2 ..

--13471--   .. CRC is valid

--13471-- Reading syms from /lib/i386-linux-gnu/libpthread-2.13.so (0x42d6000)

--13471--   Considering /lib/i386-linux-gnu/libpthread-2.13.so ..

--13471--   .. CRC mismatch (computed 87269ed5 wanted 7df95f2f)

--13471--   Considering /usr/lib/debug/lib/i386-linux-gnu/libpthread-2.13.so ..

--13471--   .. CRC is valid

--13471-- Reading syms from /usr/lib/i386-linux-gnu/libstdc++.so.6.0.14 (0x42ef000)

--13471--    object doesn't have a symbol table

--13471-- Reading syms from /lib/i386-linux-gnu/libm-2.13.so (0x43da000)

--13471--   Considering /lib/i386-linux-gnu/libm-2.13.so ..

--13471--   .. CRC mismatch (computed e686ed93 wanted a0f1e52c)

--13471--   Considering /usr/lib/debug/lib/i386-linux-gnu/libm-2.13.so ..

--13471--   .. CRC is valid

--13471-- Reading syms from /lib/i386-linux-gnu/libgcc_s.so.1 (0x4400000)

--13471--   Considering /lib/i386-linux-gnu/libgcc_s.so.1 ..

--13471--   .. CRC mismatch (computed 3fa6d24f wanted 8b2bf89f)

--13471--    object doesn't have a symbol table

--13471-- Reading syms from /lib/i386-linux-gnu/libc-2.13.so (0x441c000)

--13471--   Considering /lib/i386-linux-gnu/libc-2.13.so ..

--13471--   .. CRC mismatch (computed 97e88cd2 wanted 4635a554)

--13471--   Considering /usr/lib/debug/lib/i386-linux-gnu/libc-2.13.so ..

--13471--   .. CRC is valid

--13471-- Reading syms from /lib/i386-linux-gnu/libz.so.1.2.3.4 (0x457e000)

--13471--   Considering /lib/i386-linux-gnu/libz.so.1.2.3.4 ..

--13471--   .. CRC mismatch (computed 995eb12f wanted 33a06a21)

--13471--    object doesn't have a symbol table

--13471-- Reading syms from /lib/i386-linux-gnu/libdl-2.13.so (0x4593000)

--13471--   Considering /lib/i386-linux-gnu/libdl-2.13.so ..

--13471--   .. CRC mismatch (computed 608d0daf wanted 983d6578)

--13471--   Considering /usr/lib/debug/lib/i386-linux-gnu/libdl-2.13.so ..

--13471--   .. CRC is valid

--13471-- Reading syms from /usr/lib/i386-linux-gnu/libgthread-2.0.so.0.2800.6 (0x4597000)

--13471--   Considering /usr/lib/i386-linux-gnu/libgthread-2.0.so.0.2800.6 ..

--13471--   .. CRC mismatch (computed 244482a3 wanted 61a9cd3c)

--13471--    object doesn't have a symbol table

--13471-- Reading syms from /lib/i386-linux-gnu/librt-2.13.so (0x459c000)

--13471--   Considering /lib/i386-linux-gnu/librt-2.13.so ..

--13471--   .. CRC mismatch (computed 680ec6ea wanted 247d4d27)

--13471--   Considering /usr/lib/debug/lib/i386-linux-gnu/librt-2.13.so ..

--13471--   .. CRC is valid

--13471-- Reading syms from /lib/i386-linux-gnu/libglib-2.0.so.0.2800.6 (0x45a5000)

--13471--   Considering /lib/i386-linux-gnu/libglib-2.0.so.0.2800.6 ..

--13471--   .. CRC mismatch (computed 2312631e wanted e21a44de)

--13471--    object doesn't have a symbol table

--13471-- Reading syms from /lib/i386-linux-gnu/libpcre.so.3.12.1 (0x467d000)

--13471--   Considering /lib/i386-linux-gnu/libpcre.so.3.12.1 ..

--13471--   .. CRC mismatch (computed 9e5ab3c1 wanted 29aaf7e3)

--13471--    object doesn't have a symbol table

--13471-- REDIR: 0x448ffb0 (strncmp) redirected to 0x4020479 (_vgnU_ifunc_wrapper)

--13471-- REDIR: 0x4497140 (strstr) redirected to 0x4020479 (_vgnU_ifunc_wrapper)

--13471-- REDIR: 0x4496db0 (__GI_strstr) redirected to 0x4028ef1 (strstr)

--13471-- REDIR: 0x44900b0 (rindex) redirected to 0x4026acc (rindex)

--13471-- REDIR: 0x439b650 (operator new(unsigned int)) redirected to 0x4026398 (operator new(unsigned int))

--13471-- REDIR: 0x448bef0 (malloc) redirected to 0x40267df (malloc)

--13471-- REDIR: 0x448fd80 (__GI_strlen) redirected to 0x402702d (__GI_strlen)

--13471-- REDIR: 0x448f740 (strcmp) redirected to 0x4020479 (_vgnU_ifunc_wrapper)

--13471-- REDIR: 0x4538cb0 (__strcmp_ssse3) redirected to 0x40279d0 (strcmp)

--13471-- REDIR: 0x43994b0 (operator delete(void*)) redirected to 0x4025882 (operator delete(void*))

--13471-- REDIR: 0x448c3b0 (free) redirected to 0x4025b6b (free)

==13471== 

==13471== HEAP SUMMARY:

==13471==     in use at exit: 0 bytes in 0 blocks

==13471==   total heap usage: 8 allocs, 8 frees, 336 bytes allocated

==13471== 

==13471== All heap blocks were freed -- no leaks are possible

==13471== 

==13471== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 33 from 6)

--13471-- 

--13471-- used_suppression:     33 U1004-ARM-_dl_relocate_object

==13471== 

==13471== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 33 from 6)

Zero errors, excellent!

Technical facts

Operating system(s) or programming environment(s)

Lubuntu 15.04 (vivid)

IDE(s):

Qt Creator 3.1.1

Project type:

Console application

C++ standard:

C++98

Compiler(s):

G++ 4.9.2

Libraries used:

STL: GNU ISO C++ Library, version 4.9.2

Qt project file: ./CppMemcheckExample1/CppMemcheckExample1.pro


include(../../ConsoleApplication.pri) #Or use the code below

# QT += core

# QT += gui

# greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

# CONFIG   += console

# CONFIG   -= app_bundle

# TEMPLATE = app

# CONFIG(release, debug|release) {

#   DEFINES += NDEBUG NTRACE_BILDERBIKKEL

# }

# QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra -Weffc++

# unix {

#   QMAKE_CXXFLAGS += -Werror

# }



SOURCES += main.cpp

./CppMemcheckExample1/main.cpp


#include <iostream>



int main()

{

  std::cout << "Hello world\n";

}

./CppMemcheckExample1/valgrind_memcheck.sh


#!/bin/sh

valgrind --leak-check=full -v --show-reachable=yes --log-file=valgrind_memcheck.txt ../CppValgrindExample1-build-desktop/./CppValgrindExample1

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(C++) MemcheckExample1

valgrind_memcheck.txt

Technical facts

Qt project file: ./CppMemcheckExample1/CppMemcheckExample1.pro

./CppMemcheckExample1/main.cpp

./CppMemcheckExample1/valgrind_memcheck.sh