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