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Ian Lance Taylor 2eb4d68833 runtime: don't use systemstack for BeforeFork/AfterFork
In https://golang.org/cl/140930043 syscall.BeforeFork was changed to
call beforefork via onM. This was done because at the time BeforeFork
was written in C but was called from Go. While the runtime was being
converted to Go, calls to complex C functions used onM to ensure that
enough stack space was available.

In https://golang.org/cl/172260043 the syscall.BeforeFork and
beforefork functions were rewritten into Go. In this rewrite
syscall.BeforeFork continue to call beforefork via onM, although
because both functions were now in Go that was no longer necessary.

In https://golang.org/cl/174950043 onM was renamed to systemstack,
producing essentially the code we have today.

Therefore, the use of systemstack in syscall.BeforeFork (and
syscall.AfterFork) is a historical relic.  Remove it.

Change-Id: Ia570f556b20e8405afa6c5e707bd6f4ad18fd7ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/341335
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2021-08-13 20:50:48 +00:00
.github .github: add link to questions in ISSUE_TEMPLATE 2020-01-06 17:05:31 +00:00
api reflect: add Value.CanConvert 2021-07-21 19:25:48 +00:00
doc time: fix docs for new comma layouts 2021-08-12 21:29:44 +00:00
lib/time lib/time, time/tzdata: update tzdata to 2021a 2021-01-25 16:08:46 +00:00
misc all: gofmt more (but vendor, testdata, and top-level test directories) 2021-08-13 20:45:17 +00:00
src runtime: don't use systemstack for BeforeFork/AfterFork 2021-08-13 20:50:48 +00:00
test test: add test case for CL 340609 2021-08-13 20:49:48 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore internal/buildcfg: move build configuration out of cmd/internal/objabi 2021-04-16 19:20:53 +00:00
AUTHORS A+C: update name 2021-06-01 17:08:12 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS CONTRIBUTORS: update for the Go 1.17 release 2021-08-12 17:43:16 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
README.md README: pull gopher image from website 2021-02-16 18:25:10 +00:00
SECURITY.md SECURITY.md: update go versions 2019-09-26 15:34:57 +00:00

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