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memorylost731
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linux_man_pages_library

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#include <stdlib.h>
#include <stdio.h>
int
main(int argc, char *argv[])
{
mtrace();
for (int j = 0; j < 2; j++)
malloc(100); /* never freed\-\-a memory leak */
calloc(16, 16); /* never freed\-\-a memory leak */
exit(exit_success);
}
.ee
.in
.pp
when we run the program as follows, we see that
.br mtrace ()
diagnosed memory leaks at two different locations in the program:
.pp
.in +4n
.ex
.rb "$ " "cc \-g t_mtrace.c \-o t_mtrace"
.rb "$ " "export malloc_trace=/tmp/t"
.rb "$ " "./t_mtrace"
.rb "$ " "mtrace ./t_mtrace $malloc_trace"
memory not freed:
-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-
address size caller
0x084c9378 0x64 at /home/cecilia/t_mtrace.c:12
0x084c93e0 0x64 at /home/cecilia/t_mtrace.c:12
0x084c9448 0x100 at /home/cecilia/t_mtrace.c:16
.ee
.in
.pp
the first two messages about unfreed memory correspond to the two
.br malloc (3)
calls inside the
.i for
loop.
the final message corresponds to the call to
.br calloc (3)
(which in turn calls
.br malloc (3)).
.sh see also
.br mtrace (1),
.br malloc (3),
.br malloc_hook (3),
.br mcheck (3)
.sh colophon
this page is part of release 5.13 of the linux
.i man-pages
project.
a description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
\%https://www.kernel.org/doc/man\-pages/.
.so man3/rpc.3
.\" copyright 1993 david metcalfe ([email protected])
.\" and copyright 2008, linux foundation, written by michael kerrisk
.\"
.\" %%%license_start(verbatim)
.\" permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\" since the linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date. the author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein. the author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\" %%%license_end
.\"
.\" references consulted:
.\" linux libc source code
.\" lewine's _posix programmer's guide_ (o'reilly & associates, 1991)
.\" 386bsd man pages
.\" modified 1993-07-24 by rik faith ([email protected])
.\" modified 2002-07-25 by walter harms
.\"
.th acos 3 2021-03-22 "" "linux programmer's manual"
.sh name
acos, acosf, acosl \- arc cosine function
.sh synopsis