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thread_pthread.c (rb_reserved_fd_p): false-positive on negative FD

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Negative-numbered FDs are never valid FDs on POSIX-like
platforms, and we initialize our self-pipes/eventfd values
to "-1", so stop treating -1 as a reserved FD if our system
is too low on resources to allocate FDs at startup.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65832 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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normal 2018-11-20 07:27:28 +00:00
parent 259173ccc0
commit 8d9a9aab67
1 changed files with 4 additions and 0 deletions
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4
thread_pthread.c
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@ -1842,6 +1842,10 @@ ruby_stack_overflowed_p(const rb_thread_t *th, const void *addr)
int
rb_reserved_fd_p(int fd)
{
/* no false-positive if out-of-FD at startup */
if (fd < 0)
return 0;
#if UBF_TIMER == UBF_TIMER_PTHREAD
if (fd == timer_pthread.low[0] || fd == timer_pthread.low[1])
goto check_pid;