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Austin Clements 2595fe7fb6 runtime: don't start new threads from locked threads 
Applications that need to manipulate kernel thread state are currently
on thin ice in Go: they can use LockOSThread to prevent other
goroutines from running on the manipulated thread, but Go may clone
this manipulated state into a new thread that's put into the runtime's
thread pool along with other threads.

Fix this by never starting a new thread from a locked thread or a
thread that may have been started by C. Instead, the runtime starts a
"template thread" with a known-good state. If it then needs to start a
new thread but doesn't know that the current thread is in a good
state, it forwards the thread creation to the template thread.

Fixes #20676.

Change-Id: I798137a56e04b7723d55997e9c5c085d1d910643
Reviewed-on: https://go-review.googlesource.com/46033
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2017-10-11 17:47:08 +00:00
.github .github: update ISSUE_TEMPLATE to be closer to 'go bug' 2017-08-19 04:06:10 +00:00
api math/big: provide support for conversion bases up to 62 2017-10-06 17:46:15 +00:00
doc doc: add missing "Minor revisions" header for 1.9 2017-10-04 20:22:15 +00:00
lib/time time: vendor tzdata-2017b and update test 2017-06-07 21:23:58 +00:00
misc misc/cgo/testcarchive: skip flaky SIGPROF test on darwin 2017-10-09 06:02:50 +00:00
src runtime: don't start new threads from locked threads 2017-10-11 17:47:08 +00:00
test cmd/compile/internal/syntax: consider function nesting for error recovery 2017-10-11 00:29:58 +00:00
.gitattributes
.gitignore .gitignore: include only Go project artifiacts 2017-08-15 21:37:05 +00:00
AUTHORS A+C: final updates for Go 1.9 2017-07-18 01:47:54 +00:00
CONTRIBUTING.md .github: recommend 'go bug' when filing an issue 2017-07-24 17:18:34 +00:00
CONTRIBUTORS A+C: final updates for Go 1.9 2017-07-18 01:47:54 +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: add attribution for the Gopher image 2017-02-03 19:39:41 +00:00
robots.txt

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.

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

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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.