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186 Commits

Author SHA1 Message Date
erik.corry@gmail.com
3403e76682 Reduce boot-up memory use of V8. 
Reduce signal sender thread stack size to 32k.
Commit partial old-space pages to reduce minimum memory use.
This is a rebase of http://codereview.chromium.org/9017009/
Review URL: http://codereview.chromium.org/9179012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10413 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-01-17 11:38:25 +00:00
erik.corry@gmail.com
70da367f6b More spelling changes. 
Review URL: http://codereview.chromium.org/9231009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10407 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-01-16 12:38:59 +00:00
mstarzinger@chromium.org
83d912f0e4 Make heap size estimation more accurate. 
This improves the heap size estimation by not counting lazy swept pages
as completely allocated but use their live bytes counter instead.

R=vegorov@chromium.org
BUG=v8:1893
TEST=cctest/test-heap/TestSizeOfObjects

Review URL: http://codereview.chromium.org/9173001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10383 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-01-11 10:33:34 +00:00
vegorov@chromium.org
aae1d6c6d4 Do not delay sweeping of pages that are completely free. 
R=erik.corry@gmail.com

Review URL: http://codereview.chromium.org/8997004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10273 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-12-19 11:33:54 +00:00
ricow@chromium.org
ec66c36fbf Reland 10216 - Optimize the equality check case of ICCompare stubs. 
Now with arm and x64 support. Additionally, added default unreachable case to switch statement in CompareIC::TargetState to make win and mac compilers happy.

Reviewer guide:
This is an exact copy of 10216 except:
src/arm/*
src/x64/*
src/ic.cc (added default case to swith in CompareIC::TargetState)
Review URL: http://codereview.chromium.org/8872060

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10219 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-12-09 09:26:14 +00:00
ricow@chromium.org
174532d23f Revert 10216 Optimize the equality check case of ICCompare stubs. 
Missing arm and x64 implementations
Review URL: http://codereview.chromium.org/8883023

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10217 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-12-08 17:28:44 +00:00
ricow@chromium.org
1028cf2631 Optimize the equality check case of ICCompare stubs. 
This includes specialcasing the generation when we know that the maps
of the two objects are the same. In addition, a new specialized
compare ic known objects cache is created.

The reason for the cache is that we need to have access to the stub
code from the roots; if we do not, the GC will collect the stub. In
this specialized case we use the map pointer as key in the cache, and
we always do a lookup before generating code. Actually hitting
something in the cache will happen very rarely, but we could
potentially overwrite an existing stub, which again will lead to the
GC collecting this old stub (even if it is referenced from other code
objects)
Review URL: http://codereview.chromium.org/8520006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10216 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-12-08 17:17:21 +00:00
vegorov@chromium.org
a457040ca6 Ensure that non-optimized code objects are not flushed for inlined functions. 
Collector was flushing them if optimized code was reachable only through the stack (not through the JSFunction object) which happens when you have a pending lazy deoptimization.

Also prevent v8::Script::New from leaking internal objects allocated by the compiler into outer HandleScope.

R=kmillikin@chromium.org
BUG=http://crbug.com/97116
TEST=test/mjsunit/regress/regress-97116.js

Review URL: http://codereview.chromium.org/8888011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10215 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-12-08 16:07:07 +00:00
erik.corry@gmail.com
a8bd2260ea Rescan cells at the end of mark-sweep. This means they don't need a 
write barrier.
Review URL: http://codereview.chromium.org/8816021

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10187 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-12-07 08:43:41 +00:00
erik.corry@gmail.com
49a4dd983d Fix performance on the page cycler, which is not designed to test 
GC speed.
Review URL: http://codereview.chromium.org/8804004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10148 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-12-05 08:58:12 +00:00
erik.corry@gmail.com
e2f2c77e6f Be more willing to expand old space when evacuating new space at the end of 
a mark-sweep.  We have a soft limit on old space size, which is designed to
trigger an old-space collection when we hit it.  Unfortunately although the
soft limit had already triggered an old space collection, the soft limit was
preventing objects from new space from being promoted.  For every promotion
candidate we were checking 3 different ways to allocate in old space before
giving up and putting the object in the other semispace.  This change allows
the promoted objects to go to old space and also makes us more eager to
sweep a page before trying other ways to find space for an object.
Review URL: http://codereview.chromium.org/8748005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10092 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-11-30 10:38:16 +00:00
erik.corry@gmail.com
e9b6e58560 Fix windows build. 
Review URL: http://codereview.chromium.org/8725029

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10086 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-11-29 12:17:59 +00:00
erik.corry@gmail.com
9c18742dd6 Only sweep one page eagerly unless we are running out of space. 
Limit the number of pages that are compacted in a given GC.
Review URL: http://codereview.chromium.org/8692002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10084 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-11-29 11:56:14 +00:00
mstarzinger@chromium.org
e3eb71e991 Fix assertion while marking Harmony weak maps. 
R=erik.corry@gmail.com
BUG=v8:1845
TEST=mjsunit/harmony/proxies-example-membrane

Review URL: http://codereview.chromium.org/8715004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10081 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-11-29 08:48:51 +00:00
ulan@chromium.org
e951d38261 Set the code age field of SharedFunctionInfo correctly. 
BUG=
TEST=

Review URL: http://codereview.chromium.org/8554009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10046 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-11-22 19:46:00 +00:00
mstarzinger@chromium.org
5834284848 Refactor embedded pointer visitors for the serializer 
This patch continues the refactoring that started in r9597 and
extends it with support for the serializer.
This is required for MIPS support in the serializer.

Review URL: http://codereview.chromium.org/8467010
Patch from Gergely Kis <gergely@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9971 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-11-11 12:28:42 +00:00
vegorov@chromium.org
b8dc77ab9a Fix Heap::Shrink to ensure that it does not free pages that are still in use. 
Heap::Shrink is called from EnsureFromSpaceIsCommitted at the very start of the GC. At this moment live bytes counts on pages are in inconsistent states. Some pages might have been already swept but have not been yet reached by an incremental marker (or incremental marker is not in progress) and have live bytes count set to 0. Thus we can't rely only on LiveBytes to determine which pages can be released to the OS.

R=mstarzinger@chromium.org
BUG=100414

Review URL: http://codereview.chromium.org/8507038

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9953 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-11-10 13:24:00 +00:00
svenpanne@chromium.org
b16e02e823 Made PropertyType handling even more explicit. 
Replaced FIRST_PHANTOM_PROPERTY_TYPE by a predicate. Removed the (hopefully)
last default cases for switches on PropertyType. Benchmarks show that both
changes are performace-neutral.

Now every value of PropertyType should either be handled by an explicit case in
a switch or by an equality operator. Therefore, the C++ compiler should finally
be able to tell us which places to touch when changing PropertyType.

Review URL: http://codereview.chromium.org/8506004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9930 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-11-09 12:47:15 +00:00
mstarzinger@chromium.org
79cadcc947 Fix Harmony sets and maps to allow null as key. 
This changes the internal convention for marking deleted entries in hash
tables from null_value to the_hole_value, which is consistent with other
usages of the_hole.

R=rossberg@chromium.org,kmillikin@chromium.org
BUG=v8:1622
TEST=mjsunit/harmony/collections

Review URL: http://codereview.chromium.org/8343056

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9871 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-11-03 14:17:05 +00:00
erik.corry@gmail.com
b8af27868f Speed up debug mode GC. 
Review URL: http://codereview.chromium.org/8380038

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9772 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-10-25 12:13:06 +00:00
vegorov@chromium.org
5d72dde98a Switch UnreachableObjectsFilter to use Marking instead of InstrusiveMarking. 
GcSafeFindCodeForInnerPointer does not work with intrusive marking now and it is used when roots are iterated.

R=erik.corry@gmail.com

Review URL: http://codereview.chromium.org/8342037

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9721 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-10-20 11:40:16 +00:00
mstarzinger@chromium.org
1da890af54 Refactor how embedded pointers are visited. 
This refactoring (almost) gets rid of the requirement to get the target
object address for an object pointer embedded in code objects. This is
not possible on MIPS as pointers are encoded using two instructions. All
usages of RelocInfo::target_object_address() are (almost) obsoleted by
this change. The serializer still uses it, so MIPS will not yet work
with snapshots turned on.

R=danno@chromium.org,vegorov@chromium.org

Review URL: http://codereview.chromium.org/8245007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9597 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-10-12 15:43:41 +00:00
erik.corry@gmail.com
3ce33aacc6 New flag --stress-compaction 
Review URL: http://codereview.chromium.org/8234002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9582 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-10-11 15:52:15 +00:00
erik.corry@gmail.com
ba8a7f374e Add --noclever-optimizations to disable some things that have 
caused trouble in the past.
Review URL: http://codereview.chromium.org/8229005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9579 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-10-11 11:35:04 +00:00
vegorov@chromium.org
7e1c2d9d1e Keep MemoryChunk::LiveBytes in sync when marking deque overflows. 
R=erik.corry@gmail.com
BUG=v8:1672

Review URL: http://codereview.chromium.org/8139025

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9525 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-10-05 09:42:20 +00:00
vegorov@chromium.org
71519ee4b2 Fix presubmit error in mark-compact.cc 
TBR=erik.corry@gmail.com

Review URL: http://codereview.chromium.org/8089016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9496 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-30 11:09:31 +00:00
vegorov@chromium.org
807ae24307 Adjust assertions in UpdateSlot to match UpdatePointer in PointersUpdatingVisitor. 
R=erik.corry@gmail.com
BUG=v8:1740

Review URL: http://codereview.chromium.org/8081001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9490 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-30 08:45:28 +00:00
vegorov@chromium.org
3e9891c1d0 Enable code flushing for full (non-incremental) collections. 
This will ensure that we will flush code when we hit memory limits.

R=erik.corry@gmail.com
BUG=v8:1609

Review URL: http://codereview.chromium.org/8060053

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9484 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-29 13:51:47 +00:00
mstarzinger@chromium.org
279356b4b3 Implement shrinking of paged spaces during sweeping. 
For each paged space we release all but one of the unused pages after
marking (when we know the number of live bytes) but before actually
sweeping it. This is not yet done for lazy swept pages.

R=erik.corry@gmail.com
BUG=v8:1614

Review URL: http://codereview.chromium.org/7891010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9481 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-29 12:27:31 +00:00
vegorov@chromium.org
36ae5f3811 Pass correct anchor_slot for EMBEDDED_OBJECT pointers from code objects. 
Correctly initialize newly created large-object pages when incremental marking with compaction is in progress.

R=erik.corry@gmail.com
BUG=v8:1737

Review URL: http://codereview.chromium.org/8070002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9475 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-28 17:45:58 +00:00
vegorov@chromium.org
39512e148d EvacuateNewSpaceAndCandidates should explicitly skip dead large objects. 
LargeObjectSpace is swept at the very end of SweepSpaces.

R=mstarzinger@chromium.org
BUG=v8:1736

Review URL: http://codereview.chromium.org/8060013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9460 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-28 10:45:27 +00:00
mstarzinger@chromium.org
a79d439586 Fix slot buffers of abandoned evacuation candidates. 
R=vegorov@chromium.org
BUG=v8:1734
TEST=cctest/test-mark-compact/NoPromotion

Review URL: http://codereview.chromium.org/8051014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9454 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-27 13:35:04 +00:00
kmillikin@chromium.org
bcb781d76a Record function call targets, use them for inlining. 
Introduce a version of the CallFunctionStub that records monomorphic
call targets in a one-element cache in the instruction stream.  Use
the cache for inlining attempts in the optimizing backend.

R=fschneider@chromium.org
BUG=
TEST=

Review URL: http://codereview.chromium.org/7966038

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9449 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-27 11:42:02 +00:00
mstarzinger@chromium.org
e7da8b3eeb Pass sweeping mode as template parameter. 
R=yangguo@chromium.org

Review URL: http://codereview.chromium.org/8060004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9440 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-27 07:52:34 +00:00
mikhail.naganov@gmail.com
b5946d78c5 Add ObjectMoveEvent reporting for the Heap Profiler into MarkCompact. 
R=vegorov@chromium.org
BUG=none
TEST=none

Review URL: http://codereview.chromium.org/8036024

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9432 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-26 15:59:27 +00:00
vegorov@chromium.org
6dee868e03 Enable compaction, disable code-compaction. 
Enable array-join test again.

R=erik.corry@gmail.com

Review URL: http://codereview.chromium.org/8043022

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9425 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-26 11:46:16 +00:00
vegorov@chromium.org
a0f07e5db1 Fix bug in PointersUpdatingVisitor::UpdatePointer. 
It was updating the same pointer twice (was using InNewSpace instead of
InFromSpace).

Also make FLAG_never_compact supercede FLAG_always_compact.

R=erik.corry@gmail.com
BUG=v8:1721

Review URL: http://codereview.chromium.org/8041017

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9423 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-26 10:24:42 +00:00
vegorov@chromium.org
1046b1a464 Disable compaction. 
Introduce flag to control code compaction.

R=danno@chromium.org

Review URL: http://codereview.chromium.org/8037022

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9420 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-26 08:53:27 +00:00
danno@chromium.org
d21902b25e Cache multiple ElementsKind map transition per map. 
R=jkummerow@chromium.org
BUG=none
TEST=none

Review URL: http://codereview.chromium.org/8017003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9417 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-23 15:09:00 +00:00
mstarzinger@chromium.org
ec587f8a11 Implement verification of new space evacuation. 
R=vegorov@chromium.org

Review URL: http://codereview.chromium.org/7935013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9408 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-23 07:30:57 +00:00
vegorov@chromium.org
bfd048173f Notify collector about lazily deoptimized code objects. 
All slots that were recorded on these objects during incremental marking should be ignored as they are no longer valid.

To filter such invalidated slots out during slots buffers iteration we set all markbits under the invalidated code object to 1 after the code space was swept and before slots buffers are processed.

R=erik.corry@gmail.com
BUG=v8:1713
TEST=test/mjsunit/regress/regress-1713.js

Review URL: http://codereview.chromium.org/7983045

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9402 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-22 16:01:35 +00:00
mstarzinger@chromium.org
873e4980db Fix transferal of marking bits on array trimming. 
R=vegorov@chromium.org
BUG=v8:1708
TEST=mjsunit/regress/regress-1708

Review URL: http://codereview.chromium.org/7979038

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9394 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-22 13:03:22 +00:00
rossberg@chromium.org
fdade92c20 Reorganize object type enum, such that proxies are no longer in the middle 
of the range of proper JS objects.

Unfortunately, callable types no longer form a range now. However, there
are only two anyway. We put them at either end of the range of JS object
types so that certain compares can be combined.

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

Review URL: http://codereview.chromium.org/7737036

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9370 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-21 14:46:54 +00:00
vegorov@chromium.org
5b8a6c1e54 Make heap iterable in PrepareForBreakPoints. 
When aborting incremental marking with compaction discard all slots collected on evacuation candidates.

R=ricow@chromium.org
BUG=v8:1700
TEST=inspector/debugger/debugger-step-in.html

Review URL: http://codereview.chromium.org/7977004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9360 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-21 11:20:05 +00:00
lrn@chromium.org
610281f4ee Fix calculation of live-bytes in pages. 
The "live bytes" count is *really* a "marked black" count - i.e., the count of bytes *known* to be live.

Fix aggravating bug on X64 where assembler code used a value that was off
by a factor of 2^31.

Ensure that sweeping clears live-bytes. Added other missing increments.

Added print statements to trace live-byte modifications, under a flag.

Still a few cases of undercounting left.

(New issue to merge from GC branch to bleeding_edge)

Review URL: http://codereview.chromium.org/7970009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9338 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-20 11:20:00 +00:00
erik.corry@gmail.com
2f1f203bff Fix pc to code cache so it can cope with a pointer to the start of the code 
object.  Rename it to be the inner pointer to code cache.
Review URL: http://codereview.chromium.org/7969013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9336 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-20 10:08:39 +00:00
svenpanne@chromium.org
d4bb00230b Make newer GCCs happier: Fixed NULL vs. 0 confusion. 
Review URL: http://codereview.chromium.org/7970008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9333 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-20 09:43:58 +00:00
vegorov@chromium.org
ac36cb4504 Merge experimental/gc branch to the bleeding_edge. 
Review URL: http://codereview.chromium.org/7945009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9328 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-19 18:36:47 +00:00
yangguo@chromium.org
77141f78ff Tentative implementation of string slices (hidden under the flag --string-slices). 
TEST=test/mjsunit/string-slices.js

Review URL: http://codereview.chromium.org/7477045

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9027 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-08-26 13:03:30 +00:00
mstarzinger@chromium.org
b05ff5e0b9 Prototype of mark-and-compact support for Harmony weak maps. 
R=vegorov@chromium.org
BUG=v8:1565
TEST=cctest/test-weakmaps

Review URL: http://codereview.chromium.org/7553012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8817 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-08-03 12:48:30 +00:00