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Muir Manders a00916dd39 internal/lsp: fix deadlocks loading lots of files at once
The first deadlock involved differing mutex acquisition order in two
code paths:

1. loadParseTypecheck() holds the "mcache" mutex then eventually
   acquires the "handleMu" file mutex.
2. (*goFile).invalidateContent() acquires the "handleMu" mutex first and
   then the "mcache" mutex.

Fix by changing the acquisition order in invalidateContent().

The second deadlock involved the file watcher. The two code paths
involved were:

1. (*goFile).GetPackages() holds the view mutex and eventually calls
   (*WatchMap).Watch, which acquires the watcher mutex.
2. (*session).openOverlay acquires the watcher mutex as it triggers a
   file's callbacks, and then the callback
   "(*goFile).invalidateContent" acquires the view mutex.

Fix by not holding the watcher mutex as we invoke the callbacks.

Fixes golang/go#32910

Change-Id: I9d060e0d80fd86a317a1d6c7aaa736a8ce10bd07
GitHub-Last-Rev: 04944fa0249c0e6f1022a415787e23abce21bc2e
GitHub-Pull-Request: golang/tools#129
Reviewed-on: https://go-review.googlesource.com/c/tools/+/184880
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-07-03 17:22:52 +00:00
benchmark/parse benchmark/parse: fix cosmetic defect in error str. 2015-02-02 17:07:43 +00:00
blog godoc,blog: perform minor cleanup 2018-04-14 19:30:04 +00:00
cmd cmd/present: correct function reference. 2019-07-02 20:17:34 +00:00
container/intsets x/tools/container/intsets: add LowerBound 2017-08-21 16:11:21 +00:00
cover cover: handle multiple samples from the same location 2017-12-10 23:11:56 +00:00
go go/packages: avoid loading some packages in when computing overlays 2019-06-27 20:39:33 +00:00
godoc godoc: re-add test for ignoring //line comments in source code 2019-05-28 20:18:05 +00:00
gopls gopls: update go.mod file 2019-06-28 16:47:26 +00:00
imports imports: allow nil Options in Process 2019-05-20 22:08:59 +00:00
internal internal/lsp: fix deadlocks loading lots of files at once 2019-07-03 17:22:52 +00:00
playground playground: use stdlib instead of appengine packages 2019-03-07 16:39:23 +00:00
present present: remove mention of non-existing emphasis toggle 2018-10-22 17:16:10 +00:00
refactor refactor/rename: remove extraneous space 2019-06-24 15:07:48 +00:00
.gitattributes tools: copying .gitattributes to all subrepositories (fixes windows build) 2014-12-23 06:32:51 +00:00
.gitignore .gitignore: roll back ".gitignore: ignore emacs backup files" 2018-02-13 00:43:28 +00:00
AUTHORS go.empty: prototype for new subrepository 2012-01-25 14:45:13 -05:00
codereview.cfg tools: add codereview.cfg 2015-03-18 17:04:00 +00:00
CONTRIBUTING.md CONTRIBUTING.md: remove note about not accepting Pull Requests 2018-03-14 18:02:17 +00:00
CONTRIBUTORS go.empty: prototype for new subrepository 2012-01-25 14:45:13 -05:00
go.mod tools: update go.mod 2019-06-28 18:54:30 +00:00
go.sum tools: update go.mod 2019-06-28 18:54:30 +00:00
LICENSE LICENSE: add 2012-03-17 15:20:58 +11:00
PATENTS go.empty: add PATENTS file to the subrepo. 2012-04-16 11:24:04 +10:00
README.md README: switch to Markdown and add links 2017-09-27 05:40:07 +00:00

Go Tools

This subrepository holds the source for various packages and tools that support the Go programming language.

Some of the tools, godoc and vet for example, are included in binary Go distributions.

Others, including the Go guru and the test coverage tool, can be fetched with go get.

Packages include a type-checker for Go and an implementation of the Static Single Assignment form (SSA) representation for Go programs.

Download/Install

The easiest way to install is to run go get -u golang.org/x/tools/.... You can also manually git clone the repository to $GOPATH/src/golang.org/x/tools.

Report Issues / Send Patches

This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://golang.org/doc/contribute.html.

The main issue tracker for the tools repository is located at https://github.com/golang/go/issues. Prefix your issue with "x/tools/(your subdir):" in the subject line, so it is easy to find.