Preprocess structured stack trace on GC to get rid of code reference.

Preprocess structured stack trace on GC to get rid of code reference.

R=verwaest@chromium.org
BUG=v8:2340
LOG=N

Committed: https://crrev.com/462ffa1dfa0ab3a851ea0294470d1ed7ed12dd56
Cr-Commit-Position: refs/heads/master@{#28085}

[Yang, 2015-04-24 10:23:08]

On 2015/04/24 10:03:59, Yang wrote:

Preprocessing happens in mark-compact epilogue so that it's not done too eagerly
for short-lived exceptions.

[Yang, 2015-04-24 10:25:22]

The CQ bit was checked by yangguo@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-04-24 10:25:33]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1103843002/20001

[commit-bot: I haz the power, 2015-04-24 10:36:35]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-04-24 10:36:36]

Dry run: Try jobs failed on following builders:
  v8_linux_nodcheck_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_nodcheck_rel/build...)

[Yang, 2015-04-24 12:41:12]

The CQ bit was checked by yangguo@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-04-24 12:41:18]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1103843002/20001

[commit-bot: I haz the power, 2015-04-24 12:52:44]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-04-24 12:52:45]

Dry run: Try jobs failed on following builders:
  v8_linux_nodcheck_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_nodcheck_rel/build...)

[Toon Verwaest, 2015-04-24 18:36:49]

verwaest@chromium.org changed reviewers:
+ hpayer@chromium.org, ulan@chromium.org

[Toon Verwaest, 2015-04-24 18:36:50]

lgtm. hpayer: does the GC part seem reasonable to you?

[Yang, 2015-04-24 20:54:32]

The CQ bit was checked by yangguo@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-04-24 20:54:48]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1103843002/40001

[commit-bot: I haz the power, 2015-04-24 21:08:40]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-04-24 21:08:41]

Dry run: Try jobs failed on following builders:
  v8_linux_nodcheck_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_nodcheck_rel/build...)

[Hannes Payer (out of office), 2015-04-27 08:07:00]

LGTM, but you have some try bots failing

[Yang, 2015-04-27 11:35:21]

On 2015/04/27 08:07:00, Hannes Payer wrote:
> LGTM, but you have some try bots failing

Fixed on crash. The other is due to a bug in WeakFixedArray that will soon be
fixed by a CL by Jakob.

[Yang, 2015-04-27 13:15:20]

The CQ bit was checked by yangguo@chromium.org

[Yang, 2015-04-27 13:15:20]

The patchset sent to the CQ was uploaded after l-g-t-m from hpayer@chromium.org,
verwaest@chromium.org
Link to the patchset: https://codereview.chromium.org/1103843002/#ps60001
(title: "fix crash")

[commit-bot: I haz the power, 2015-04-27 13:15:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1103843002/60001

[commit-bot: I haz the power, 2015-04-27 13:16:26]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-04-27 13:16:27]

Try jobs failed on following builders:
  v8_linux_arm64_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_arm64_rel/builds/5189)

[Yang, 2015-04-27 14:15:48]

The CQ bit was checked by yangguo@chromium.org

[Yang, 2015-04-27 14:15:48]

The patchset sent to the CQ was uploaded after l-g-t-m from hpayer@chromium.org,
verwaest@chromium.org
Link to the patchset: https://codereview.chromium.org/1103843002/#ps80001
(title: "rebase")

[commit-bot: I haz the power, 2015-04-27 14:16:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1103843002/80001

[commit-bot: I haz the power, 2015-04-27 14:51:08]

Committed patchset #5 (id:80001)

[commit-bot: I haz the power, 2015-04-27 14:51:23]

Patchset 5 (id:??) landed as
https://crrev.com/462ffa1dfa0ab3a851ea0294470d1ed7ed12dd56
Cr-Commit-Position: refs/heads/master@{#28085}

[yurys, 2015-04-27 15:18:13]

yurys@chromium.org changed reviewers:
+ yurys@chromium.org

[yurys, 2015-04-27 15:18:13]

Looks like heap profiler needs update to treat references from
weak_stack_trace_list (or probabli WeakFixedArray in general) as weak.

[Dmitry Lomov (no reviews), 2015-04-27 15:53:22]

A revert of this CL (patchset #5 id:80001) has been created in
https://codereview.chromium.org/1102383002/ by dslomov@chromium.org.

The reason for reverting is: Broke GCStress.