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252 Commits

Author SHA1 Message Date
yangguo@chromium.org
4d1d1eb53e Fix building with GCC 3.x 
R=yangguo@chromium.org
BUG=v8:2016, v8:2017
TEST=

Review URL: https://chromiumcodereview.appspot.com/10823034
Patch from James Pike <g00gle@chilon.net>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12199 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-07-26 09:18:09 +00:00
mstarzinger@chromium.org
abede994d9 Refactor incremental marking to use static visitor. 
This is a refactoring only change that switches incremental marking to
use a static object visitor. It also shares the common code between the
non-incremental and the incremental marker. Sharing that would require
semantical changes will be done later.

R=verwaest@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10816007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12193 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-07-25 15:23:07 +00:00
danno@chromium.org
0fb5189a32 Refine object stats for FixedArrays. 
R=yangguo@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10797008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12165 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-07-20 14:06:24 +00:00
verwaest@chromium.org
26afeb6ea5 Don't record elements transition slots since it will contain a map. 
Additionally removed unused code.

Review URL: https://chromiumcodereview.appspot.com/10802039

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12150 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-07-20 07:24:50 +00:00
sanjoy@chromium.org
693c7643d2 Optimize functions on a second thread. 
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10807024

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12148 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-07-19 18:58:23 +00:00
danno@chromium.org
1ab272ab36 Track counts/sizes of CODE sub types with --track-gc-object-stats 
R=mstarzinger@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10792014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12104 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-07-17 11:58:49 +00:00
verwaest@chromium.org
11e5c9e281 Removed transitions from the accessor pair descriptors. 
AccessorPair related transitions are now also stored as single map links, simplifying the code that handles transitions. AccessorPairs can now be shared between descriptor arrays, since they can only be mutated after another transition anyway; during which the pair is copied before writing.

Review URL: https://chromiumcodereview.appspot.com/10784014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12097 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-07-16 14:02:50 +00:00
danno@chromium.org
aae81e125b Add counters that automatically track object sizes and counts. 
Review URL: https://chromiumcodereview.appspot.com/10702168

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12082 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-07-13 12:22:09 +00:00
verwaest@chromium.org
45419ee145 Swap bitfield3 and backpointer. 
Bitfield3 now has its own field, while the backpointer shares the field with the descriptor array; which will become the transition array.

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10692130

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12034 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-07-10 13:31:36 +00:00
verwaest@chromium.org
75407ae2b7 Moving prototype transitions into the header of the transition array. 
Review URL: https://chromiumcodereview.appspot.com/10692026

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12022 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-07-10 07:53:00 +00:00
verwaest@chromium.org
d7a5b7d5e2 Separating transitions from descriptors. 
In this design maps contain descriptor arrays, which in turn can contain transition arrays. If transitions are needed when no descriptor array is present, a descriptor array without real descriptors is inserted just so it can point at the transition array.

The transition array does not contain details about the field it transitions to. In order to weed out transitions to FIELDs from CONSTANT_FUNCTION (what used to be MAP_TRANSITION vs CONSTANT_TRANSITION), the transition needs to be followed and the details need to be looked up in the target map. CALLBACKS transitions are still easy to recognize since the transition targets are stored as an AccessorPair containing the maps, rather than the maps directly.

Currently AccessorPairs containing a transition and an accessor are shared between the descriptor array and the transition array. This simplifies lookup since we only have to look in one of both arrays. This will change in subsequent revisions, when descriptor arrays will become shared between multiple maps, since transitions cannot be shared.

Review URL: https://chromiumcodereview.appspot.com/10697015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11994 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-07-05 13:54:20 +00:00
verwaest@chromium.org
68c944c265 In-place shrinking of descriptor arrays with non-live transitions. 
Instead of overwriting non-live transitions with NULL_DESCRIPTORs, we remove them from the array by compacting the array (shifting live values to the left) and in-place trimming the array. If the final descriptor array contains no live values (only contained transitions which are now all cleared), we move bit_field3 back from the descriptor array to the map. The descriptor array itself will be collected in the next GC.

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10575032

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11922 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-06-25 13:10:54 +00:00
mstarzinger@chromium.org
776493ab42 Fix lazy sweeping heuristics to prevent old-space expansion. 
This is a temporary fix to prevent excessive expansion of old-space
caused by inaccuracies in lazy sweeper advancing. We actually don't
intend to sweep any pages eagerly, but that requires further changes
to lazy sweeping.

R=ulan@chromium.org,erik.corry@gmail.com
BUG=v8:2194

Review URL: https://chromiumcodereview.appspot.com/10640002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11904 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-06-22 11:47:30 +00:00
yangguo@chromium.org
47be3e8231 Fix lint. 
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/10640018

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11903 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-06-22 10:11:19 +00:00
mstarzinger@chromium.org
6cf640ab6c Adapt fragmentation heuristics for over reserved pages. 
This adapts the heuristics that detect fragmented pages to reduce memory
footprint for spaces with over reserved memory. This minimizes external
fragmentation caused by pages that cannot be released to the OS because
of just a few live objects on them.

R=erik.corry@gmail.com
TEST=cctest/test-heap/ReleaseOverReservedPages

Review URL: https://chromiumcodereview.appspot.com/10629004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11901 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-06-22 09:29:49 +00:00
verwaest@chromium.org
8aca22b1ef Implementing weak referencing elements transition maps. 
Review URL: https://chromiumcodereview.appspot.com/10559032

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11842 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-06-18 11:43:09 +00:00
ulan@chromium.org
b072e6156b Unify promotion and allocation limit computation. 
BUG=129628
R=mstarzinger@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10552002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11835 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-06-15 13:48:54 +00:00
fschneider@chromium.org
bb0a2ea766 Share optimized code for closures. 
Each SharedFunctionInfo gets an optimized code map to store
one optimized code object per context. When allocating a new
closure we consult this map and check if there is optimized code
that can be shared.

This patch is based on an original patch
by Anton Muhin (http://codereview.chromium.org/6793013/).

BUG=v8:2087, v8:2094
TEST=test/mjsunit/compiler/optimized-closures.js
Review URL: https://chromiumcodereview.appspot.com/10103035

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11817 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-06-14 14:06:22 +00:00
verwaest@chromium.org
2b574ef580 Promoting elements transitions to their own field. 
This is a first step towards separating all transitions from the property descriptions. If we link the property descriptions from the transition object, this will in allow the descriptor array (property descriptions) to become immutable.

Review URL: https://chromiumcodereview.appspot.com/10444055

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11750 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-06-11 06:59:56 +00:00
verwaest@chromium.org
98c37e1f4c Merging ContentArray into DescriptorArray 
Review URL: https://chromiumcodereview.appspot.com/10412030

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11703 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-06-04 07:20:11 +00:00
verwaest@chromium.org
75f35d3fe1 Decoupling MarkDescriptorArray as much as possible from the ContentArray. 
Review URL: https://chromiumcodereview.appspot.com/10417030

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11683 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-05-30 15:15:17 +00:00
mstarzinger@chromium.org
f17833b6ec Fix presubmit error in r11630. 
TBR=erik.corry@gmail.com

Review URL: https://chromiumcodereview.appspot.com/10409091

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11632 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-05-23 11:40:38 +00:00
mstarzinger@chromium.org
7412d9adbe Change sentinel value for zapping of old-to-new pointers. 
R=erik.corry@gmail.com
BUG=v8:2143

Review URL: https://chromiumcodereview.appspot.com/10411089

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11630 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-05-23 11:17:22 +00:00
mstarzinger@chromium.org
f9b93e6cc7 Implement map collection for incremental marking. 
This causes map transitions to be treated weakly during incremental
marking and hence allows clearing of non-live transitions. The marking
code is now shared between incremental and non-incremental mode.

R=vegorov@chromium.org
BUG=v8:1465
TEST=cctest/test-heap/Regress1465

Review URL: https://chromiumcodereview.appspot.com/10310168

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11577 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-05-16 10:07:50 +00:00
mstarzinger@chromium.org
88a9350f14 Revert r11556 and r11558 to allow roll. 
R=yangguo@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10383182

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11564 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-05-15 12:01:23 +00:00
mstarzinger@chromium.org
0c54a2371c Implement map collection for incremental marking. 
This causes map transitions to be treated weakly during incremental
marking and hence allows clearing of non-live transitions. The marking
code is now shared between incremental and non-incremental mode.

R=vegorov@chromium.org
BUG=v8:1465
TEST=cctest/test-heap/Regress1465

Review URL: https://chromiumcodereview.appspot.com/10386046

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11556 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-05-15 08:39:25 +00:00
mstarzinger@chromium.org
526b3f2cac Implement explicit back pointers in transition tree. 
This makes back pointers in the map transition tree explicit by having
accurate back pointers throughout the lifetime of maps instead of
establishing and destroying back pointers before and after each marking
phase. This is a prerequisite for being able to clear map transitions
during incremental marking.

R=vegorov@chromium.org
BUG=v8:1465

Review URL: https://chromiumcodereview.appspot.com/10381053

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11528 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-05-09 07:29:18 +00:00
ulan@chromium.org
ae0a7ec93a Use correct size of promoted space for setting promotion and allocation limits. 
Review URL: https://chromiumcodereview.appspot.com/10376008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11513 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-05-04 09:36:46 +00:00
mstarzinger@chromium.org
11d24334fc Implement ClearFunctionTypeFeedback for test cases. 
R=danno@chromium.org
TEST=mjsunit/compiler/inline-construct

Review URL: https://chromiumcodereview.appspot.com/10332010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11509 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-05-04 09:16:38 +00:00
erik.corry@gmail.com
bd3c2c028f Enable code flushing even when objects were marked incrementally, 
since the incremental visitor is setting the gc_age fields correctly.
This means the ResetSharedFunctionInfoCountersDuringIncrementalMarking
test passes even if it hits a marking stack overflow.
Review URL: https://chromiumcodereview.appspot.com/10258001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11481 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-05-02 12:58:40 +00:00
svenpanne@chromium.org
a0d67fd9b0 Flush PC-to-code cache before doing verification. 
Review URL: https://chromiumcodereview.appspot.com/10144002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11395 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-04-20 09:37:06 +00:00
mstarzinger@chromium.org
7d22d73ebf Fix issues when stressing compaction with WeakMaps. 
1) While marking the backing hash table of a WeakMap we also need to
   record the slot because it might be on an evacuation candidate.
2) With incremental marking one backing hash table might be marked more
   than once because the WeakMap might have gone through a white to gray
   transition.
3) The corner case when the allocation of the backing hash table itself
   causes a GC, leads to a WeakMap with an undefined table field, so we
   still need to handle this case correctly.

R=vegorov@chromium.org
TEST=mjsunit/harmony/proxies-example-membrane --stress-compaction

Review URL: https://chromiumcodereview.appspot.com/9985010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11385 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-04-19 10:32:38 +00:00
vegorov@chromium.org
870eba4c65 Process weak references between optimized JSFunctions on scavenges. 
R=mstarzinger@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10091027

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11347 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-04-17 10:37:41 +00:00
mstarzinger@chromium.org
6276295e28 Fix WeakMap processing for evacuation candidates (2). 
This fixes processing of WeakMaps so that keys on evacuation candidates
which are also reachable by other strong paths are correctly recorded in
the slots buffer.

Also backing stores that reside in the large-object-space now use the
correct anchor slot.

R=vegorov@chromium.org
BUG=v8:2060
TEST=cctest/test-weakmaps/Regress2060b

Review URL: https://chromiumcodereview.appspot.com/10034018

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11279 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-04-11 15:32:31 +00:00
mstarzinger@chromium.org
00d9c14729 Fix WeakMap processing for evacuation candidates. 
This fixes processing of WeakMaps so that value entries on an evacuation
candidate are correctly recorded in the slots buffer. We didn't pass the
correct slot into the backing hashtable while visiting values.

Also the live bytes counter for large object space pages was not reset
correctly when incremental marking is aborted.

R=vegorov@chromium.org
BUG=v8:2060
TEST=cctest/test-weakmaps/Regress2060

Review URL: https://chromiumcodereview.appspot.com/10034010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11264 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-04-11 09:14:29 +00:00
ulan@chromium.org
59b06fd638 Reset function info counters after context disposal. 
R=jkummerow@chromium.org
BUG=117767,V8:1902

Review URL: https://chromiumcodereview.appspot.com/9836091

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11143 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-26 13:08:08 +00:00
ulan@chromium.org
0b6a617779 Age inline caches after context disposal. 
Review URL: https://chromiumcodereview.appspot.com/9837005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11122 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-23 13:33:11 +00:00
erik.corry@gmail.com
e3774cf23f Record the addresses of pages that are unmapped to aid 
in post mortem crash dump analysis.
Review URL: https://chromiumcodereview.appspot.com/9700061

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11071 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-16 14:13:22 +00:00
mstarzinger@chromium.org
cd91894d2f Fix missing initialization of mark-compact flags. 
R=svenpanne@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9662056

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11006 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-12 12:17:46 +00:00
mstarzinger@chromium.org
4b4b3a4da7 Add kAbortIncrementalMarkingMask flag for GC. 
This adds an additional flag to control whether incremental marking
should be aborted when requesting a GC, providing a finer granularity
between kNoGCFlags and kMakeHeapIterableMask.

R=ulan@chromium.org
BUG=v8:1608

Review URL: https://chromiumcodereview.appspot.com/9608006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10961 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-03-07 17:52:16 +00:00
vegorov@chromium.org
fbc230e42b Ensure that executable pages are properly guarded. 
Split executable memory chunks into two pieces: header with all metadata (protection: RW) and body (protection: RWX). Separate header from metadata with a guard page and add a guard page after the page body.

R=erik.corry@gmail.com
BUG=http://crbug.com/115151

Review URL: https://chromiumcodereview.appspot.com/9452002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10809 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-23 12:11:24 +00:00
jkummerow@chromium.org
0177aa62da Count ICs that have type information. 
Hidden behind --type-info-threshold=X flag, usage dependent on experimental profiler.

Review URL: https://chromiumcodereview.appspot.com/9403009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10753 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-20 12:57:23 +00:00
jkummerow@chromium.org
de510c3a58 Split experimental profiler flags 
Review URL: https://chromiumcodereview.appspot.com/9374015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10660 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-09 13:30:01 +00:00
jkummerow@chromium.org
aa2e842134 Count-based profiling for primitive functions (hidden behind a flag) 
Review URL: https://chromiumcodereview.appspot.com/9361026

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10657 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-09 10:19:46 +00:00
vegorov@chromium.org
96baf602df Ensure that regexp code flushing correctly updates slots buffer. 
Enable code compaction again.

R=erik.corry@gmail.com

Review URL: https://chromiumcodereview.appspot.com/9365019

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10647 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-08 15:44:07 +00:00
vegorov@chromium.org
99fa8059c3 Try enabling (non-incremental) code compaction again. 
This time include slot-recording fixes in code flushing that were accidentally omitted from the previous commit.

R=mstarzinger@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9348018

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10625 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-07 14:43:51 +00:00
vegorov@chromium.org
9920e441fa Disable code compaction again while we investigate buildbot check failures. 
Review URL: https://chromiumcodereview.appspot.com/9351013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10619 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-07 10:03:08 +00:00
vegorov@chromium.org
029aa9ef92 Enable non-incremental code compaction. 
It is intended to bring memory usage down on idle notifications.

R=erik.corry@gmail.com
BUG=v8:1726

Review URL: https://chromiumcodereview.appspot.com/9323079

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10616 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-07 08:51:47 +00:00
vegorov@chromium.org
405b875fec Fix compilation failure introduced by r10601. 
Cast intptr_t to int in PrintFs.

TBR=erik.corry@gmail.com

Review URL: https://chromiumcodereview.appspot.com/9325028

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10602 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-03 14:30:48 +00:00
vegorov@chromium.org
a7b0481b6d Tweak compaction candidate selection to avoid keeping page with low occupancy around. 
Increase slots buffer chain length to 15 to make compaction more aggressive and usefull.

Pass gc and collector selection reasons to GCTracer to allow more meaningull --gc-trace.

Print fragmentation of spaces that we do not compact.

R=erik.corry@gmail.com

Review URL: https://chromiumcodereview.appspot.com/9323007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10601 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-03 14:16:40 +00:00