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VALGRIND\ C++ Examples of the VALGRIND Memory Leak Detector {#valgrind-c-examples-of-the-valgrind-memory-leak-detector align=”center”} =================================================

VALGRIND is a directory of C++ programs which illustrate the use of VALGRIND, a suite of programs which includes a memory leak detector.

The simplest way to use VALGRIND on a program that is suspected of having memory leaks is to compile with the “-g” option, and then issue the VALGRIND command followed by the normal execution command:

        g++ -g myprog.C
        mv a.out myprog
        valgrind myprog

On a Macintosh, it is necessary to include a particular switch that generates the necessary symbol tables in order that VALGRIND can report line numbers.

        valgrind --dsymutil=yes myprog

Essentially, VALGRIND runs the program, but constantly watches to detect illegal memory references, and prints messages when these are spotted.

Licensing: {#licensing align=”center”}

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Languages: {#languages align=”center”}

VALGRIND examples are available in a C version and a C++ version and a FORTRAN77 version. a FORTRAN90 version.

Related Data and Programs: {#related-data-and-programs align=”center”}

GDB, FORTRAN90 programs which illustrate the use of the GNU debugger program on a FORTRAN90 program;

Reference: {#reference align=”center”}

1. Julian Seward, et al,\ Valgrind Documentation.

Examples and Tests: {#examples-and-tests align=”center”}

TEST01 is an example in which 11 elements of the Fibonacci sequence are stored in a vector allocated only for 10 elements:

• test01.cpp, the calling program;
• test01_output.txt, the output file.
• test01_valgrind_output.txt, the output file using VALGRIND.

TEST02 is an example in which some uninitialized data is accessed.

• test02.cpp, the calling program;
• test02_output.txt, the output file.
• test02_valgrind_output.txt, the output file using VALGRIND.

You can go up one level to the C++ source codes.

Last revised on 19 May 2011.