Related to crbug/454297.

Review URL: https://codereview.chromium.org/897523003

Cr-Commit-Position: refs/heads/master@{#26410}

Hopefully we'll catch heap corruption earlier where identifying the
object that holds a stale pointer.

Speaking of staleness, also remove old debugging code.

BUG=chromium:128415
R=ulan@chromium.org,hpayer@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/843013005

Cr-Commit-Position: refs/heads/master@{#26095}

This is not needed anymore since all ICs use weak cells to embed maps.

BUG=v8:3629
LOG=N

Review URL: https://codereview.chromium.org/817223003

Cr-Commit-Position: refs/heads/master@{#25928}

This reverts commit 2bc756e4
because of performance regression in kraken.

BUG=chromium:444232
LOG=N
TBR=hpayer@chromium.org

Review URL: https://codereview.chromium.org/816353002

Cr-Commit-Position: refs/heads/master@{#25918}

This keeps dying maps alive for FLAG_retain_maps_for_n_gc garbage collections to increase chances of them being reused for new objects in future.

BUG=v8:3664
LOG=N
TEST=cctest/test-heap/MapRetaining

Review URL: https://codereview.chromium.org/794583003

Cr-Commit-Position: refs/heads/master@{#25887}

Groups and implicit references are no longer relevant at this point.

Also add tests that fail if the first or second round of ephemeral
marking is omitted

BUG=none
R=mstarzinger@chromium.org,hpayer@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/761343004

Cr-Commit-Position: refs/heads/master@{#25606}

BUG=

Review URL: https://codereview.chromium.org/770453003

Cr-Commit-Position: refs/heads/master@{#25588}

BUG=

Review URL: https://codereview.chromium.org/766663006

Cr-Commit-Position: refs/heads/master@{#25564}

BUG=

Review URL: https://codereview.chromium.org/756553002

Cr-Commit-Position: refs/heads/master@{#25478}

MapCache simplification. It is now a FixedArray that maps number of properties to a WeakCell with a Map.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/712943002

Cr-Commit-Position: refs/heads/master@{#25253}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25253 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Introduce an object that holds a weak reference.
Design document: http://goo.gl/9dSvvy.

BUG=
R=erik.corry@gmail.com

Review URL: https://codereview.chromium.org/640303006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24606 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=erik.corry@gmail.com, ulan@chromium.org

Review URL: https://codereview.chromium.org/629903003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24567 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=none
R=hpayer@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/618323007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24382 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Job based sweeping is enabled since 3.29, so remove the now obsolete
thread based implementation

BUG=none
R=hpayer@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/615933003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24352 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TEST=base-unittests,cctest,mjsunit
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/528993002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23617 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/479113004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23283 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The bit counting functions provided by CompilerIntrinsics were undefined
for zero, which was easily overlooked and unsafe in general. Also their
implementation was kinda hacky and mostly untested. Fixed the
implementation and moved the functions to base/bits.h.

TEST=base-unittests,cctest,compiler-unittests,mjsunit
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/494633002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23229 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/440063002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22864 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=none
R=hpayer@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/437993003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22850 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Remove all encountered weak maps from the list of weak collections when incremental marking is aborted.

BUG=399527
LOG=n
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/439233002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22844 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This way we don't clash with the ASSERT* macros
defined by GoogleTest, and we are one step closer
to being able to replace our homegrown base/ with
base/ from Chrome.

R=jochen@chromium.org, svenpanne@chromium.org

Review URL: https://codereview.chromium.org/430503007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22812 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/404083002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22545 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/398333002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22471 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This is essentially https://codereview.chromium.org/390823003/. It turns
out that it's safe to use a persistent GCTracer instead
of creating and destroying GCTracers for each GC, because
Scavenge and Mark-Sweep steps never overlap, and the tracking of
incremental marking also happens separately for the two types of GC.
Tracking of incremental marking will be moved into the GCTracer in a
follow-up patch.

R=hpayer@chromium.org, mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/403543002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22465 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/396443004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22394 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Revert "Remove sequential sweeping mode and perform lazy sweeping when no sweeper threads are active."

Reason: broke win64 build

This reverts commit 221bfdd2da2b6f3c1cbe77c5d197f1ea626b0bd2.

TBR=hpayer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/393523002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22374 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/384373002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22372 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Revert "Remove sequential sweeping mode and perform lazy sweeping when no sweeper threads are active."

This reverts commit r22346 for breaking GC stress tests.

TBR=hpayer@chromium.org

Review URL: https://codereview.chromium.org/386943003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22349 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/382793002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22346 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/380263002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22331 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/384743002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22322 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/380653003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22318 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Wait for sweeper threads only if we have to, i.e. if we globally have to finish sweeping or if we have to allocate from a certain space.
BUG=
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/361983003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22156 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Also split v8-core independent methods from checks.h to base/logging.h and
merge v8checks with the rest of checks.

The CPU::FlushICache method is moved to CpuFeatures::FlushICache

RoundUp and related methods are moved to base/macros.h

Remove all layering violations from src/libplatform

BUG=none
R=jkummerow@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/358363002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22092 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Special case the ConstantPoolArray in MarkCompactCollector::MigrateObject since it could contain
integer value entires which look like tagged pointers.

R=hpayer@chromium.org, mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/304223002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21934 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/345523002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21915 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=hpayer@chromium.org
BUG=chromium:380068
LOG=N

Review URL: https://codereview.chromium.org/310783003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21655 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

- this avoids using relative include paths which are forbidden by the style guide
- makes the code more readable since it's clear which header is meant
- allows for starting to use checkdeps

BUG=none
R=jkummerow@chromium.org, danno@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/304153016

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21625 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Reland r21442 "Inobject slack tracking is done on a per-closure basis instead of per-shared info basis."
This fixes inobject slack tracking for prototype inheritance pattern that uses closures.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/292183008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21457 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Revert "Reland r21346 "Inobject slack tracking is done on a per-closure basis instead of per-shared info basis.""

This reverts r21442.

TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/292433016

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21444 ce2b1a6d-e550-0410-aec6-3dcde31c8c00