Linux 查看 glibc 版本
Linux About 1,143 words方法一
ldd --version
输出
bash-4.4$ ldd --version
ldd (GNU libc) 2.28
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Roland McGrath and Ulrich Drepper.
方法二
执行库文件
/lib64/libc.so.6
或者
/lib/libc.so.6
输出
bash-4.4$ /lib64/libc.so.6
GNU C Library (GNU libc) stable release version 2.28.
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 8.5.0 20210514 (Red Hat 8.5.0-10.0.2).
libc ABIs: UNIQUE IFUNC ABSOLUTE
For bug reporting instructions, please see:
<http://www.gnu.org/software/libc/bugs.html>.
方法三
查看软连接
ls -l /lib64/libc.so.*
或者
ls -l /lib/libc.so.*
输出
bash-4.4$ ls -l /lib64/libc.so.*
lrwxrwxrwx 1 root root 12 Jun 17 2022 /lib64/libc.so.6 -> libc-2.28.so
补充
glibc
提供的malloc
/free
系列函数来进行内存的分配。
Linux
中malloc
的早期版本是由Doug Lea
实现的,它有一个严重问题是内存分配只有一个分配区(arena
),每次分配内存都要对分配区加锁,分配完释放锁,导致多线程下并发申请释放内存锁的竞争激烈。
Views: 632 · Posted: 2023-08-07
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