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Author SHA1 Message Date
yurys@chromium.org
97cbb319bd Provide user-friendly access to natively bound function parameters 
For a closure created using native Function.prototype.bind() the most important information for the heap profiler user is bound function, receiver and arguments. This change adds shortcuts for those fields.
Review URL: https://chromiumcodereview.appspot.com/9382002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10675 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-10 13:54:20 +00:00
loislo@chromium.org
dc3f16a321 I will apply it to the nodes that can't be mapped to Heap object or Native object. 
As example there are 'Detached DOM Tree' nodes in WebKit. It is very useful to be able to see all such
nodes grouped together. It can be done with help of some post processing but I did this explicitly
on v8 side because it is much faster. At the moment this kind of nodes has kNative type.
I'd like to hide these nodes from the Retainment View but I can filter them only by name.

BUG=none
TEST=HeapSnapshotRetainedObjectInfo

Review URL: https://chromiumcodereview.appspot.com/9323064

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10614 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-07 05:21:00 +00:00
yurys@chromium.org
a13ad53191 Heap profiler should report implicit references. 
Implicit references reported to V8 with V8::AddImplicitReferences calls are now reported by heap profiler as 'native' references with type kInternal.

Original WebKit bug report: https://bugs.webkit.org/show_bug.cgi?id=77414
Review URL: https://chromiumcodereview.appspot.com/9316092

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10603 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-02-03 14:51:53 +00:00
loislo@chromium.org
07d720ec41 Detailed heap snapshot usability improvement. 
The detailed heap snapshot has two groups of nodes. The first one
is the group for v8 heap nodes and the second one is the group for
native objects. At the moment we have two different sets of native
objects. There are 'Detached DOM trees' and 'Document DOM trees' type of objects.

I think it'd be nice to replace one group containing all native objects with
separate groups for different types of native objects.

BUG=none
TEST=HeapSnapshotRetainedObjectInfo

Review URL: https://chromiumcodereview.appspot.com/9223009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10528 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2012-01-27 12:02:57 +00:00
mikhail.naganov@gmail.com
dae713f0ad Reapply r10158: Distinguish weak references in heap snapshots, group GC roots. 
[Fixed the bug revealed by the Win32 bot]

Several changes to better organize snapshot data:

1. Provide information about weak references.
2. Group (GC roots) children.
3. Prettify debug snapshot printing.

BUG=v8:1832
TEST=cctest/test-heap-profiler/*Weak*
TBR=vitalyr@chromium.org

Initial CL: http://codereview.chromium.org/8716009

Review URL: http://codereview.chromium.org/8822019

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10182 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-12-06 17:41:47 +00:00
mikhail.naganov@gmail.com
a0c8ea00db Revert r10158 "Distinguish weak references in heap snapshots, group GC roots." 
Heap profiler tests fail on Win32, need to investigate.

This reverts commit b5374ebd92c11ac4aae16b4e31e54166d406e490.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10162 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-12-05 17:21:55 +00:00
mikhail.naganov@gmail.com
857aa09772 Distinguish weak references in heap snapshots, group GC roots. 
Several changes to better organize snapshot data:

1. Provide information about weak references.
2. Group (GC roots) children.
3. Prettify debug snapshot printing.

BUG=v8:1832
TEST=cctest/test-heap-profiler/*Weak*

Review URL: http://codereview.chromium.org/8716009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10158 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-12-05 16:35:57 +00:00
mikhail.naganov@gmail.com
a0f3c5d451 Really fix missing HandleScope to prevent local handles to DOMWindow leaking. 
A follow-up to r9994.

R=vitalyr@chromium.org
BUG=102895
TEST=cctests/test-heap-profiler/NoHandleLeaks

Review URL: http://codereview.chromium.org/8468016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10030 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-11-18 11:42:39 +00:00
mikhail.naganov@gmail.com
007ad200f8 Fix missing fast property accessors in heap snapshots. 
Implementation for this case

var x = {};
x.__defineGetter__("y", function Y() { return 42; });

BUG=v8:1818
TEST=cctest/test-heap-profiler/FastCaseGetter

Review URL: http://codereview.chromium.org/8491041
Patch from Ilya Tikhonovsky <loislo@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9985 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-11-14 11:13:29 +00:00
mikhail.naganov@gmail.com
fa0d4ecf43 The detailed heap snapshot generator was slightly adjusted for tracking sliced strings. 
BUG=v8:1779
TEST=cctest/test-heap-profiler/HeapSnapshotSlicedString

Review URL: http://codereview.chromium.org/8362028
Patch from Ilya Tikhonovsky <loislo@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9742 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-10-21 13:05:37 +00:00
mikhail.naganov@gmail.com
c05354ecc4 Add v8::HeapGraphNode::GetHeapValue method. 
This allows getting a heap object by a heap snapshot node for further
inspection. Very useful for objects from bindings that mostly have
getter-provided fields.

R=vegorov@google.com
BUG=webkit/61179
TEST=test-heap-profiler/GetHeapValue,GetHeapValueForDeletedObject

Review URL: http://codereview.chromium.org/8046006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9430 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-26 14:38:29 +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
mikhail.naganov@gmail.com
f8e5c71e18 Rename SmartPointer to SmartArrayPointer. 
As pointed out in: http://codereview.chromium.org/7754007/#msg5

"SmartPointer should have been named SmartArrayPointer as it expects an input
allocated using new[] and deallocates it using delete[]. Using it as a simple
scoped pointer for a single object is incorrect."

R=mnaganov@chromium.org

Review URL: http://codereview.chromium.org/7860011
Patch from Thiago Farina <tfarina@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9215 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-09-09 22:39:47 +00:00
mikhail.naganov@gmail.com
2e1e5fc09c Heap profiler: for objects of class "Object", try to lookup name 
from the constructor function. This works well for binding objects,
and this matches DevTools' algorithm for name assignment.

R=sgjesse@chromium.org
BUG=none
TEST=test-heap-profiler/GetConstructorName

Review URL: http://codereview.chromium.org/7709026

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9000 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-08-23 12:24:54 +00:00
mikhail.naganov@gmail.com
58824435d1 Pick the namespace alias 'i' from v8.h. 
These files already include v8.h so they don't need to define the
namespace alias again.

Signed-off-by: Thiago Farina <tfarina@chromium.org>

Review URL: http://codereview.chromium.org/7640012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8919 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-08-12 09:49:55 +00:00
sgjesse@chromium.org
8a6108de95 Remove the ability to compile without logging and profiling 
The preprocessor defines ENABLE_LOGGING_AND_PROFILING and ENABLE_VMSTATE_TRACKING has been removed as these where required to be turned on for Crankshaft to work. To re-enable reducing the binary size by leaving out heap and CPU profiler a new set of defines needs to be created.

R=ager@chromium.org

BUG=v8:1271
TEST=all

Review URL: http://codereview.chromium.org//7350014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8622 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-07-13 09:09:04 +00:00
mikhail.naganov@gmail.com
f4bf8f8fee Remove obsolete aggregating and non-working producers heap profilers. 
2000 LOC are gone!

R=sgjesse@chromium.org
BUG=1481

Review URL: http://codereview.chromium.org/7247018

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8406 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-06-24 11:38:47 +00:00
mikhail.naganov@gmail.com
bf9b2f8c2c Heap profiler: add an ability to iterate over snapshot's nodes. 
This is a preparation for removing aggregated heap snapshots.
W/o this API, counting object instances in a snapshot is very hard.

R=sgjesse@chromium.org
BUG=1481
TEST=cctest/test-heap-profiler/NodesIteration

Review URL: http://codereview.chromium.org/7204040

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8342 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-06-21 08:02:34 +00:00
mikhail.naganov@gmail.com
cd67929b0b Heap profiler: fetch document.URL of global objects. 
This allows to distinguish DOMWindow objects in browser from each other.

R=vitalyr@chromium.org,sgjesse@chromium.org
BUG=https://bugs.webkit.org/show_bug.cgi?id=61177
TEST=cctest/test-heap-profiler/DocumentURL

Review URL: http://codereview.chromium.org/7082012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8111 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-05-30 14:31:47 +00:00
vitalyr@chromium.org
179702df03 Inline more zone stuff. 
R=ager@chromium.org

Review URL: http://codereview.chromium.org/7066004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8009 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-05-23 22:23:50 +00:00
kmillikin@chromium.org
d0fcbb4ece Simplify include dependencies. 
Try to make sure that accessors.h, data-flow.h, list-inl.h, and
scopeinfo.h are included only where needed, but without introducing
implicit dependencies.

Review URL: http://codereview.chromium.org/6903175

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7756 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-05-03 08:23:58 +00:00
mikhail.naganov@gmail.com
b64e85d241 Heap profiler: emit more descriptive names for system objects and properties. 
BUG=none
TEST=none

Review URL: http://codereview.chromium.org/6776009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7438 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-03-30 14:04:50 +00:00
mikhail.naganov@gmail.com
2d95ed4b25 Remove snapshots-related code that is implemented in DevTools heap profiler. 
Diffs and retaining paths are implemented on JS side. There is no need
to maintain native implementation.

R=vitalyr@chromium.org
BUG=none
TEST=none

Review URL: http://codereview.chromium.org/6770009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7412 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-03-29 12:52:07 +00:00
mikhail.naganov@gmail.com
b2b5d2777e Add support for CPU and heap profiles deletion. 
R=vitalyr@chromium.org
BUG=none
TEST=none

Review URL: http://codereview.chromium.org/6685084

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7308 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-03-22 16:10:01 +00:00
vitalyr@chromium.org
7976ca2cbc Merge isolates to bleeding_edge. 
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7271 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-03-18 20:35:07 +00:00
vitalyr@chromium.org
76e226f832 Revert r7268: it borked the history. 
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7269 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-03-18 19:41:05 +00:00
vitalyr@chromium.org
6ff7fdebd3 Merge isolates to bleeding_edge. 
Review URL: http://codereview.chromium.org/6685088

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7268 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-03-18 18:49:56 +00:00
mikhail.naganov@gmail.com
dee9c00267 Add an interface for an embedder to provide information about native 
objects retained by object groups and global handles.

This information is then used during heap snapshot generation
to provide a more complete memory picture.

This patch will be needed to fix https://bugs.webkit.org/show_bug.cgi?id=53659.

Review URL: http://codereview.chromium.org/6626043

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7125 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2011-03-10 12:05:31 +00:00
mikhail.naganov@gmail.com
5cf643aa42 New heap profiler: add support for progress reporting and control. 
As taking a snapshot of a large heap takes noticeable time, it's
good to be able to monitor and control it.

The change itself is small, big code deletes and additions are in
fact moves. The only significant change is simplification of
approximated retained sizes calculation algorithm.

Review URL: http://codereview.chromium.org/5687003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5978 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-12-13 10:42:06 +00:00
mikhail.naganov@gmail.com
dd1a7fa2b3 New Heap Profiler: add API method for finding a graph node by id. 
TEST=cctest/test-heap-profiler/HeapSnapshotGetNodeById

Review URL: http://codereview.chromium.org/5537001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5914 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-12-02 15:38:51 +00:00
mikhail.naganov@gmail.com
0634c50950 New Heap profiler: fix JSON serialization of aggregated profiles. 
Serialization was failing due to unset dominator pointers.

TEST=test-heap-snapshot/AggregatedHeapSnapshotJSONSerialization

Review URL: http://codereview.chromium.org/5314003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5888 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-11-24 10:47:18 +00:00
mikhail.naganov@gmail.com
1cfc63cf8a New heap profiler: implement fast retaining sizes approximation. 
Approximation is done by building a dominators tree for the heap graph.
Dominator nodes and retained sizes are serialized into JSON.

Removed:
 - reachable size (it is useless, after all);
 - HeapEntryCalculatedData (size is now stored in the node, retaining
   paths in a hash map);

Review URL: http://codereview.chromium.org/5154007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5867 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-11-22 14:00:40 +00:00
mikhail.naganov@gmail.com
051f314a99 New heap profiler: include all heap objects and refs into snapshot. 
Otherwise, retaned memory sizes are not precise. This increases size
of heap snapshot, I will deal with this later. Heap objects and
references previously missing in snapshot are now marked as 'hidden'.
That means, they not shown to user, but participate in sizes
calculation.

Other small changes:
 - added 'shortcut' graph edges: e.g. to pin global objects on top
   level;
 - meta-information in JSON snapshot is no more double encoded.

Review URL: http://codereview.chromium.org/5139002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5849 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-11-18 10:38:25 +00:00
mikhail.naganov@gmail.com
0f66199b5e Heap profiler: remove context checks for objects. 
It seems that there will be no access to heap snapshots from
web pages' code, only from Developer Tools, thus it makes no
sense doing filtering of object by their security contexts.

Review URL: http://codereview.chromium.org/4681003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5787 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-11-08 15:18:12 +00:00
mikhail.naganov@gmail.com
d4bc8e1585 New Heap profiler: add dumping HeapNumbers and InternalFields to snapshot. 
HeapNumbers do consume memory, so it's worth dumping them. However, we
don't dump their values, as they are not as self-descriptive as values
of strings, and they will increase snapshot size. Storing heap numbers
values can be added if we will feel a sufficient demand for that.

InternalFields are used, e.g. for storing references to DOM nodes
event handlers.

Review URL: http://codereview.chromium.org/3769007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5635 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-10-18 09:15:38 +00:00
mikhail.naganov@gmail.com
788c5e344d Better align heap snapshots contents with debugger info. 
I created a heap snapshot in Chromium, and then started comparing
it side-by-side with representations of objects provided by
the debugger, fixing discrepancies.

Review URL: http://codereview.chromium.org/3590029

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5612 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-10-13 14:57:00 +00:00
mikhail.naganov@gmail.com
5a30072502 Fix HeapSnapshotsDiff test, diff implementation, and a bug introduced 
during snapshot size optimization.

Sorry, now I figured out that the diff implementation itself was also
incorrect.  Reachable nodes must be filtered from the beginning,
otherwise, an object that is already disconnected, but not discarded
yet, will not appear as a deleted (thankfully, this bug for some
reason had appeared on the x64 port.)

BUG=868
TEST=HeapSnapshotRootPreservedAfterSorting

Review URL: http://codereview.chromium.org/3531005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5570 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-10-01 07:19:23 +00:00
mikhail.naganov@gmail.com
44050b12b9 Revert last commit due to check fail on Linux. 
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5568 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-09-30 12:35:03 +00:00
mikhail.naganov@gmail.com
99c276bbbc Fix HeapSnapshotsDiff test and a bug introduced during snapshot size optimization. 
The bug wasn't revealed because the test was disabled.

BUG=848
TEST=HeapSnapshotsDiff,HeapSnapshotRootPreservedAfterSorting

Review URL: http://codereview.chromium.org/3572003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5567 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-09-30 12:24:56 +00:00
mikhail.naganov@gmail.com
228d56bd8e Add support for abortion in v8::OutputStream. 
It's a good idea to allow receiver to interrupt data transmission.

Review URL: http://codereview.chromium.org/3409002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5452 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-09-14 15:11:24 +00:00
mikhail.naganov@gmail.com
2388079051 Implement heap snapshots serialization into JSON. API is designed 
to avoid storing serialized snapshot on VM, instead it is emitted
using output stream interface.

The size of JSON emitted is roughly equal to used heap size
(when stored as an ASCII string).

Now a whole heap snapshot can be serialized and transmitted outside
VM. This makes possible:
  - implementing non-async UI for heap snapshots inspection;
  - storing heap snapshots for further inspection;
  - remote profiling (we can even implement a snapshotting mode
    where a snapshot isn't even stored in VM, only transmitted --
    good for mobile devices);
  - creating tools for outside heap snapshots processing, e.g.
    converting to HPROF.

Review URL: http://codereview.chromium.org/3311028

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5450 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-09-14 11:49:06 +00:00
mikhail.naganov@gmail.com
e839a1ca58 Heap profiler: allow returning aggregated snapshots via the new API. 
This is intended for smoother migration to the new API in Chromium.
Also, aggregated heap snapshots can be used for cheaply obtaining
heap statistics, e.g. in tests.

Review URL: http://codereview.chromium.org/3124024

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5297 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-08-18 08:19:29 +00:00
mikhail.naganov@gmail.com
0765b6ea3e Fix issue 822: handling of JSObject::elements in CalculateNetworkSize. 
BUG=822
TEST=test-heap-profiler/Issue822

Review URL: http://codereview.chromium.org/3128004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5235 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-08-11 09:03:23 +00:00
mikhail.naganov@gmail.com
1695003bb9 Heap profiler: reduce heap snapshots size. 
The size of a snapshot is now 65-80% of the JS heap size (tested on
GMail and Wave), previously it was >200%.

BUG=783

Review URL: http://codereview.chromium.org/3060008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5211 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-08-09 11:37:24 +00:00
mikhail.naganov@gmail.com
3471e873ab Fix presubmit errors in test-heap-profiler.cc 
I tried adding CheckNonEqualsHelper for int64_t, but this causes
another avalanche of function resolving ambuguities. So, I ended
up fooling linter.

TBR=ager@chromium.org

Review URL: http://codereview.chromium.org/3024001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5081 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-07-15 15:01:42 +00:00
mikhail.naganov@gmail.com
522faec553 Fix compile errors on Linux x64 and Windows. 
Will fix test-heap-profiler in the next change.

TBR=ager@chromium.org

Review URL: http://codereview.chromium.org/2877019

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5079 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-07-15 14:28:52 +00:00
mikhail.naganov@gmail.com
c98ac6e82c Heap profiler: implement diffing of snapshots. 
To trace objects between snapshots, an external map of object tags is
maintained. After the first heap snapshot has been taken, the map is
updated by reporting object moves from the GC. If no snapshots were
taken, there is no overhead (except for flag checking).

I considered graph comparison algorithms that doesn't require using
object tags, but they are all of a high computational complexity, and
will still fail to detect object moves properly, even for trivial
cases, so using tags looks like unavoidable.

Review URL: http://codereview.chromium.org/3020002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5078 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-07-15 13:21:50 +00:00
kaznacheev@chromium.org
0243bc875c Move serialized scope info from Code object to SharedFunctionInfo. 
The scope info is now stored in a FixedArray referenced from SharedFunctionInfo.


Review URL: http://codereview.chromium.org/2918001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5056 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-07-13 13:06:33 +00:00
mikhail.naganov@gmail.com
b6e6ab6972 Heap profiler: perform a GC round before taking a snapshot 
to get rid of global object loaded from a snapshot. This
eliminates the "double global object" issue. Thanks to Mads
for suggesting this!

Review URL: http://codereview.chromium.org/2865013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4917 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-06-22 14:58:08 +00:00
mikhail.naganov@gmail.com
93387f272e Heap profiler: add a missing link between a function closure and shared function info. 
Review URL: http://codereview.chromium.org/2846012

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4891 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2010-06-17 12:56:55 +00:00