$ man mtrace
只可以用与检查 malloc 的泄露. 怎么用？可以在网上查
NAME
mtrace, muntrace - malloc debugging
SYNOPSIS
#include <mcheck.h>
void mtrace(void);
void muntrace(void);
DESCRIPTION
The function mtrace() installs handlers for malloc(3), realloc(3) and
free(3). The function muntrace() disables these handlers.
The environment variable MALLOC_TRACE defines a file where mtrace()
writes its output. This file must be writable to the user or mtrace()
will do nothing. If the file is not empty it will be truncated.
CONFORMING TO
These are GNU extensions.
NOTES
The output of mtrace() will be ASCII but not in a friendly format. So
glibc comes with a perl-script called mtrace to make sense of it.
SEE ALSO
malloc(3), malloc_hook(3)
COLOPHON
This page is part of release 3.22 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can be
found at http://www.kernel.org/doc/man-pages/.