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Emmanuel T Odeke e79b57d6c4 os/signal: lazily start signal watch loop only on Notify
By lazily starting the signal watch loop only on Notify,
we are able to have deadlock detection even when
"os/signal" is imported.

Thanks to Ian Lance Taylor for the solution and discussion.

With this change in, fix a runtime gorountine count test that
assumed that os/signal.init would unconditionally start the
signal watching goroutine, but alas no more.

Fixes #21576.

Change-Id: I6eecf82a887f59f2ec8897f1bcd67ca311ca42ff
Reviewed-on: https://go-review.googlesource.com/c/go/+/101036
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2019-10-02 03:52:59 +00:00
.github .github: don't render author-facing text in ISSUE_TEMPLATE 2018-11-02 04:47:34 +00:00
api api/go1.13: add debug/elf.Symbol fields added in CL 184099 2019-08-08 18:44:16 +00:00
doc doc: remove double mention of custom workspace 2019-09-29 07:57:04 +00:00
lib/time lib/time: update tz data to 2019b 2019-07-03 23:08:27 +00:00
misc syscall/js: add Value.Delete for deleting JavaScript properties 2019-09-30 14:40:06 +00:00
src os/signal: lazily start signal watch loop only on Notify 2019-10-02 03:52:59 +00:00
test os/signal: lazily start signal watch loop only on Notify 2019-10-02 03:52:59 +00:00
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.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: change email address for Akhil Indurti 2019-09-09 15:30:38 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: change email address for Akhil Indurti 2019-09-09 15:30:38 +00:00
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