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Cherry Zhang 67f0f83216 runtime: disable async preemption on darwin/arm(64) if no cgo
On darwin, we use libc calls, and cgo is required on ARM and
ARM64 so we have TLS set up to save/restore G during C calls. If
cgo is absent, we cannot save/restore G in TLS, and if a signal
is received during C execution we cannot get the G. Therefore
don't send signals (and hope that we won't receive any signal
during C execution).

This can only happen in the go_bootstrap program (otherwise cgo
is required).

Fixes #35800.

Change-Id: I6c02a9378af02c19d32749a42db45165b578188d
Reviewed-on: https://go-review.googlesource.com/c/go/+/208818
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2019-11-26 16:55:36 +00:00
.github .github: don't render author-facing text in ISSUE_TEMPLATE 2018-11-02 04:47:34 +00:00
api unicode: upgrade to Unicode 12 2019-11-05 14:34:56 +00:00
doc doc: add section for major version suffixes to module reference 2019-11-19 22:42:59 +00:00
lib/time lib/time: update tz data to 2019c 2019-11-26 12:03:08 +00:00
misc misc/cgo/testshared: do not write to GOROOT 2019-11-25 17:05:01 +00:00
src runtime: disable async preemption on darwin/arm(64) if no cgo 2019-11-26 16:55:36 +00:00
test cmd/compile: try harder to not use an empty src.XPos for a bogus line 2019-11-22 03:06:22 +00:00
.gitattributes
.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 C: update email address for utkarsh-extc 2019-10-03 12:39:06 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS
README.md README: linkify some paths 2018-06-06 18:07:01 +00:00
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SECURITY.md SECURITY.md: update go versions 2019-09-26 15:34:57 +00:00

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