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ecf388f3a4
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Austin Clements ecf388f3a4 runtime: take stack barrier lock during copystack 
Commit bbd1a1c prevented SIGPROF from scanning stacks that were being
copied, but it didn't prevent a stack copy (specifically a stack
shrink) from happening while SIGPROF is scanning the stack. As a
result, a stack copy may adjust stack barriers while SIGPROF is in the
middle of scanning a stack, causing SIGPROF to panic when it detects
an inconsistent stack barrier.

Fix this by taking the stack barrier lock while adjusting the stack.
In addition to preventing SIGPROF from scanning this stack, this will
block until any in-progress SIGPROF is done scanning the stack.

For 1.5.2.

Fixes #13362.
Updates #12932.

Change-Id: I422219c363054410dfa56381f7b917e04690e5dd
Reviewed-on: https://go-review.googlesource.com/17191
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-11-24 01:50:52 +00:00
api api: update next.txt 2015-11-13 09:26:18 +00:00
doc doc: update 1.6.txt for fmt.Scanf change 2015-11-23 21:13:23 +00:00
lib/time lib/time: update to IANA release 2015e. 2015-07-22 02:56:31 +00:00
misc cmd/cgo: ignore vars with no name or type if they have a AttrSpecification 2015-11-23 04:04:07 +00:00
src runtime: take stack barrier lock during copystack 2015-11-24 01:50:52 +00:00
test cmd/compile: address several more 1.6 TODOs in parser 2015-11-21 07:21:23 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.gitignore runtime: break out system-specific constants into package sys 2015-11-12 17:04:45 +00:00
AUTHORS A+C: automated updates 2015-11-13 14:07:05 +00:00
CONTRIBUTING.md doc: suggest security@golang.org for reporting security issues 2015-06-26 09:53:36 +00:00
CONTRIBUTORS A+C: add Steve Newman (Google CLA) 2015-11-13 15:51:00 +00:00
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README.md readme: emphasize issue tracker is for bugs/proposals 2015-10-02 18:44:14 +00:00
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README.md

The Go Programming Language

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For example, if you extracted the tar file into $HOME/go, you might put the following in your .profile:

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See https://golang.org/doc/install or doc/install.html for more details.