根据Oracle的Multithreaded Programming Guide,fork()在信号处理程序中应该是安全的.但是我的进程被卡在信号处理程序中,跟随回溯：
#0 __lll_lock_wait_private () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1 0x00007f86e6a9990d in _L_lock_48 () from /lib/x86_64-linux- gnu/libc.so.6
#2 0x00007f86e6a922ec in ptmalloc_lock_all () at arena.c:242
#3 0x00007f86e6ad5e82 in __libc_fork () at ./nptl/sysdeps/unix/sysv/linux/x86_64/../fork.c:95
#4 0x00007f86e7d9f125 in __fork () at ./nptl/sysdeps/unix/sysv/linux/pt-fork.c:25
....
#7 signal handler called
因此,malloc在信号处理程序中使用是不安全的,fork可以如何？
提前致谢.
最佳答案
现在是listed as a bug by RedHat：
原文链接：https://www.f2er.com/linux/440979.htmlBug 1422161 – glibc: fork is not async-signal-safe
…
+++ This bug was initially created as a clone of Bug #1422159 +++
POSIX requires that fork is async-signal-safe. Our current
implementation is not.
