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Cherry Zhang e577ba98d8 [release-branch.go1.14] runtime: don't send preemption signal if there is a signal pending 
If multiple threads call preemptone to preempt the same M, it may
send many signals to the same M such that it hardly make
progress, causing live-lock problem. Only send a signal if there
isn't already one pending.

Updates #37741.
Fixes #37833.

Change-Id: Id94adb0b95acbd18b23abe637a8dcd81ab41b452
Reviewed-on: https://go-review.googlesource.com/c/go/+/223737
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
(cherry picked from commit 0c0e8f224d)
Reviewed-on: https://go-review.googlesource.com/c/go/+/223939
Reviewed-by: Austin Clements <austin@google.com>
2020-03-18 18:38:30 +00:00
.github .github: add link to questions in ISSUE_TEMPLATE 2020-01-06 17:05:31 +00:00
api go/types: unexport Checker.LookupFieldOrMethod 2020-01-31 14:46:05 +00:00
doc [release-branch.go1.14] doc/go1.14: document that unparsable URL in net/url.Error is now quoted 2020-03-06 18:42:56 +00:00
lib/time lib/time: update tz data to 2019c 2019-11-26 12:03:08 +00:00
misc [release-branch.go1.14] cmd/trace: update to use WebComponents V0 polyfill 2020-03-02 22:35:40 +00:00
src [release-branch.go1.14] runtime: don't send preemption signal if there is a signal pending 2020-03-18 18:38:30 +00:00
test [release-branch.go1.14] runtime: make typehash match compiler generated hashes exactly 2020-03-10 20:06:03 +00:00
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VERSION [release-branch.go1.14] go1.14 2020-02-25 17:40:40 +00:00

README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

Gopher image Gopher image by Renee French, licensed under Creative Commons 3.0 Attributions license.

Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.

Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.

Download and Install

Binary Distributions

Official binary distributions are available at https://golang.org/dl/.

After downloading a binary release, visit https://golang.org/doc/install or load doc/install.html in your web browser for installation instructions.

Install From Source

If a binary distribution is not available for your combination of operating system and architecture, visit https://golang.org/doc/install/source or load doc/install-source.html in your web browser for source installation instructions.

Contributing

Go is the work of thousands of contributors. We appreciate your help!

To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html

Note that the Go project uses the issue tracker for bug reports and proposals only. See https://golang.org/wiki/Questions for a list of places to ask questions about the Go language.