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/* Copyright (c) 2002, 2015, Oracle and/or its affiliates.
Copyright (c) 2012, 2017, MariaDB Corporation.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/* guess_malloc_library() deduces, to the best of its ability,
the currently used malloc library and its version */
#include <stddef.h>
#include "my_global.h"
#include <m_string.h>
typedef const char* (*tc_version_type)(int*, int*, const char**);
typedef int (*mallctl_type)(const char*, void*, size_t*, void*, size_t);
char *guess_malloc_library()
{
tc_version_type tc_version_func;
mallctl_type mallctl_func;
#ifndef HAVE_DLOPEN
return (char*) MALLOC_LIBRARY;
#else
static char buf[128];
if (strcmp(MALLOC_LIBRARY, "system") != 0)
{
return (char*) MALLOC_LIBRARY;
}
/* tcmalloc */
tc_version_func= (tc_version_type) dlsym(RTLD_DEFAULT, "tc_version");
if (tc_version_func)
{
int major, minor;
const char* ver_str = tc_version_func(&major, &minor, NULL);
strxnmov(buf, sizeof(buf)-1, "tcmalloc ", ver_str, NULL);
return buf;
}
/* jemalloc */
mallctl_func= (mallctl_type) dlsym(RTLD_DEFAULT, "mallctl");
if (mallctl_func)
{
char *ver;
size_t len = sizeof(ver);
mallctl_func("version", &ver, &len, NULL, 0);
strxnmov(buf, sizeof(buf)-1, "jemalloc ", ver, NULL);
return buf;
}
return (char*) MALLOC_LIBRARY;
#endif
}
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