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Bryan C. Mills e57350f4c0 runtime: fix _cgo_yield usage with sysmon and on BSD 
There are a few problems from change 35494, discovered during testing
of change 37852.

1. I was confused about the usage of n.key in the sema variant, so we
   were looping on the wrong condition. The error was not caught by
   the TryBots (presumably due to missing TSAN coverage in the BSD and
   darwin builders?).

2. The sysmon goroutine sometimes skips notetsleep entirely, using
   direct usleep syscalls instead. In that case, we were not calling
   _cgo_yield, leading to missed signals under TSAN.

3. Some notetsleep calls have long finite timeouts. They should be
   broken up into smaller chunks with a yield at the end of each
   chunk.

updates #18717

Change-Id: I91175af5dea3857deebc686f51a8a40f9d690bcc
Reviewed-on: https://go-review.googlesource.com/37867
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
 		2017-03-09 18:36:49 +00:00
.github doc: improve issue template and contribution guidelines 2017-02-11 20:42:06 +00:00
api math/big: define Word as uint instead of uintptr 2017-02-21 19:31:40 +00:00
doc doc: add link to the setting GOPATH guide 2017-03-07 00:59:54 +00:00
lib/time lib/time: update tzdata to 2016j 2017-01-05 01:00:53 +00:00
misc runtime: fix _cgo_yield usage with sysmon and on BSD 2017-03-09 18:36:49 +00:00
src runtime: fix _cgo_yield usage with sysmon and on BSD 2017-03-09 18:36:49 +00:00
test cmd/compile: check loop rescheduling with stack bound, not counter 2017-03-08 18:52:12 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.gitignore cmd/dist: move cmd/go z files to cmd/go/internal/cfg 2017-02-03 20:30:52 +00:00
AUTHORS A+C: automated update 2016-12-21 03:22:22 +00:00
CONTRIBUTING.md doc: improve issue template and contribution guidelines 2017-02-11 20:42:06 +00:00
CONTRIBUTORS A+C: automated update 2016-12-21 03:22:22 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS
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README.md readme: add attribution for the Gopher image 2017-02-03 19:39:41 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
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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 hundreds of contributors. We appreciate your help!

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

Note that the Go project does not use GitHub pull requests, and that we use 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.