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os/signal: remove comments about SA_RESTART

It's no longer necessary for non-Go signal handlers to use SA_RESTART.

For #20400
Fixes #44761

Change-Id: Ie3c7fecc631a4a2822331754296ea09b308e1391
Reviewed-on: https://go-review.googlesource.com/c/go/+/298269
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
This commit is contained in:
Ian Lance Taylor 2021-03-03 08:04:40 -08:00
parent bd37284784
commit a08adda12c

View File

@ -129,9 +129,7 @@ If the non-Go code installs any signal handlers, it must use the
SA_ONSTACK flag with sigaction. Failing to do so is likely to cause
the program to crash if the signal is received. Go programs routinely
run with a limited stack, and therefore set up an alternate signal
stack. Also, the Go standard library expects that any signal handlers
will use the SA_RESTART flag. Failing to do so may cause some library
calls to return "interrupted system call" errors.
stack.
If the non-Go code installs a signal handler for any of the
synchronous signals (SIGBUS, SIGFPE, SIGSEGV), then it should record