code review 7493044: undo CL 7301062 / 9742f722b558

undo CL 7301062 / 9742f722b558

broke arm garbage collector

traceback_arm fails with a missing pc. It needs CL 7494043.
But that only makes the build break later, this time with
"invalid freelist". Roll back until it can be fixed correctly.

««« original CL description
runtime: restrict stack root scan to locals and arguments

R=rsc
CC=golang-dev
https://codereview.appspot.com/7301062
»»»

[rsc, 2013-03-05 20:33:03]

Hello golang-dev@googlegroups.com,

I'd like you to review this change to
https://go.googlecode.com/hg/

[bradfitz, 2013-03-05 20:33:37]

LGTM

On Tue, Mar 5, 2013 at 12:33 PM, <rsc@golang.org> wrote:

> Reviewers: golang-dev1,
>
> Message:
> Hello golang-dev@googlegroups.com,
>
> I'd like you to review this change to
> https://go.googlecode.com/hg/
>
>
> Description:
> undo CL 7301062 / 9742f722b558
>
> broke arm garbage collector
>
> traceback_arm fails with a missing pc. It needs CL 7494043.
> But that only makes the build break later, this time with
> "invalid freelist". Roll back until it can be fixed correctly.
>
> ««« original CL description
> runtime: restrict stack root scan to locals and arguments
>
> R=rsc
> CC=golang-dev
>
https://codereview.appspot.**com/7301062<https://codereview.appspot.com/7301062>
> »»»
>
> Please review this at
https://codereview.appspot.**com/7493044/<https://codereview.appspot.com/7493...
>
> Affected files:
>   M src/pkg/runtime/mgc0.c
>   M src/pkg/runtime/mprof.goc
>   M src/pkg/runtime/proc.c
>   M src/pkg/runtime/runtime.h
>   M src/pkg/runtime/sigqueue.goc
>   M src/pkg/runtime/traceback_arm.**c
>   M src/pkg/runtime/traceback_x86.**c
>
>
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>
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>
>
>

[rsc, 2013-03-05 20:36:43]

*** Submitted as https://code.google.com/p/go/source/detail?r=866f0a07de2d ***

undo CL 7301062 / 9742f722b558

broke arm garbage collector

traceback_arm fails with a missing pc. It needs CL 7494043.
But that only makes the build break later, this time with
"invalid freelist". Roll back until it can be fixed correctly.

««« original CL description
runtime: restrict stack root scan to locals and arguments

R=rsc
CC=golang-dev
https://codereview.appspot.com/7301062
»»»

R=golang-dev, bradfitz
CC=golang-dev
https://codereview.appspot.com/7493044