This change is a continuation of the refactoring started in r14265.

Renamed SignalSender to SamplerThread to match platforms that don't support signal sending.

Cygwin and Windows implementations are almost identical. Mac OS X uses different API to suspend thread but apart from that it is very similar to Windows implenenation.

BUG=None

Review URL: https://codereview.chromium.org/14264009

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14272 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Remove relocation lock.

Freeze HValue hash codes that are based on object addresses.

R=svenpanne@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/14040006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14273 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix bug introduced by r13960.

Allocator does not backtrack thus during allocation we must not create an unhandled live
range which starts before the start of the current live range.

If such range is added to the list of unhandled it might see an inconsistent state of active/inactive live-ranges as they are retired to handled as soon as start of the current live range is larger than their end.

Add assertion to catch this kind of bugs early.

TEST=NavierStokes does not fail on ARM

Review URL: https://codereview.chromium.org/14262005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14274 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS:  Remove soft-float support.

Port r14159 (0c64645)

Original commit message:
Remove ARM support for VFP2

BUG=

TEST=

Review URL: https://codereview.chromium.org/14113011
Patch from Dusan Milosavljevic <Dusan.Milosavljevic@rt-rk.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14275 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
pthreads seem to be fully supported on Linux and Android which allows to remove many #ifdefs.

Also OS::Sleep(interval_) is used to pause sampling thread on all platforms. It makes no sense to send signal once 900mks to compensate 100mks delay on signal delivery as the signals would be delivered once 900mks.

BUG=None

Review URL: https://codereview.chromium.org/14238007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14278 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Handle OOM failures correctly in the CEntryStub when embedders set V8::IgnoreOutOfMemoryException()

BUG=chromium:231217

Review URL: https://codereview.chromium.org/14066009

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14279 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Replace OS::MemCopy with OS::MemMove (just as fast but more flexible).

Review URL: https://codereview.chromium.org/13932006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14280 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Remove bogus CPU scope.

R=mvstanton@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/14295004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14281 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Make gyp work with Cygwin

Review URL: https://codereview.chromium.org/13760003

Patch from Haitao Feng <haitao.feng@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14282 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
New GC related APIs: Implicit references.

When using these APIs, the embedder doesn't need to copy Persistent handles around.

BUG=NONE

Review URL: https://codereview.chromium.org/14175005

Patch from Marja Hölttä <marja@chromium.org>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14283 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix Windows build

Review URL: https://codereview.chromium.org/13929015

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14284 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
First cut at impementing ES6 TypedArrays in V8.

BUG=

Review URL: https://codereview.chromium.org/13975012

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14285 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Build error fix after r14283.

BUG=NONE

Review URL: https://codereview.chromium.org/14060010

Patch from Marja Hölttä <marja@chromium.org>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14286 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Release build fix

TBR=rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/14296008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14287 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
ARM: Makefile/gyp update allowing better control of ARM specific options.

This patch defines new makefile command line paramaters to better control the
ARM specific options. The new paramters are
 * armfpu      = vfp, vfpv3-d16, vfpv3, neon.
 * armfloatabi = softfp, hard
 * armneon     = on
 * armthumb    = on, off
 * armtest     = on
One existing paratemer has been modified:
 * armv7       = true, false
A number of parameters have been deprecated (but are still working):
 * hardfp      = on, off
 * vfp2        = off
 * vfp3        = off

the armtest paratmer when set to "on" will lock the options used during compile
time at runtime. This allows for example to easily test the ARMv6 build on an
ARMv7 platform without having to worry about features detected at runtime. When
not specified the compiler default will be used meaning it is not necessary
anymore to specify hardfp=on when natively building on an hardfp platform.

The shell help now prints the target options and features detected.

BUG=none
TEST=none

Review URL: https://chromiumcodereview.appspot.com/14263018

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14288 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix compilation failure on Win64 since r14285.

R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/14238012

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14289 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix shared library build of preparser: properly #undef V8EXPORT

Review URL: https://codereview.chromium.org/14293010

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14290 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix ARM specific GYP variables

Review URL: https://codereview.chromium.org/14208011

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14291 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Revert the commits adding new GC-related APIs.

We need to solve efficiency problems first.

This reverts the following revisions: 14283 14286 14221 14215

BUG=

Review URL: https://codereview.chromium.org/14294009

Patch from Marja Hölttä <marja@chromium.org>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14293 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Handle OOM failures correctly in the CEntryStub when embedders set V8::IgnoreOutOfMemoryException()

Port r14279 (81829ab4)

BUG=

Review URL: https://codereview.chromium.org/14299006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14294 ce2b1a6d-e550-0410-aec6-3dcde31c8c00