8194734 : Handle to jimage file inherited into child processes (win)
Alan.Bateman at oracle.com
Sun Apr 8 16:26:34 UTC 2018
On 06/04/2018 22:01, Martin Buchholz wrote:
> The design on Unix was that all file descriptors greater than 3 are
> closed on fork and before exec.
> But regardless of that, we should try to set the CLOEXEC bit on all
> our file descriptor (who knows, there might be native code that does
> File descriptor 3 is indeed deep magic, used for error reporting.
> It's a serious bug if FAIL_FILENO ends up being used for something
> other than the error reporting pipe.
> I don't think I'm the last (or the first!) person who touched this.
STDERR_FILENO is 2 so I'm curious which error reporting pipe is bring
discussed here. The jimage file is opened very early when initializing
the VM so it will get a low file descriptor number, seems to be 3. The
only surprise is that it doesn't close as it shouldn't need the file
descriptor after it mmapped.
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