I'm trying to define a JavaScript function in v8. I need to save some
context info for the scope of Script when I enter the script and make it
available to the native function I define. What is the API for doing that?
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Found Isolate.GetData and Isolate.SetData. Assuming that's the way to go
I'll give them a try.
On Friday, February 14, 2014 3:36:39 PM UTC-8, Jane Chen wrote:
I'm trying to define a JavaScript function in v8. I need to save some
context info for the scope of Script when I enter the script
, 2014 10:30:02 AM UTC-8, Ben Noordhuis wrote:
On Sun, Feb 16, 2014 at 4:51 PM, Jane Chen jxch...@gmail.comjavascript:
wrote:
Hey Ben,
That's really good to know. I think that's probably what I need. Just
took
a look at the API doc:
/**
* Gets the embedder data
This is what I did:
svn co http://v8.googlecode.com/svn/branches/3.24 v8
cd v8
make dependencies
make -j8 x86.debug library=shared werror=no
LIBTOOL-STATIC /space/v8/out/x64.debug/libicudata.a
LIBTOOL-STATIC
/space/v8/out/x64.debug/obj.host/third_party/icu/libicudata.a
TOUCH
I'm having problem building v8 on Windows in cygwin. Here are the steps I
followed:
$ svn co http://v8.googlecode.com/svn/branches/3.24 v8
$ cd v8
$ svn co http://gyp.googlecode.com/svn/trunk build/gyp
$ svn co --force
https://src.chromium.org/chrome/trunk/deps/third_party/icu46
requires something that your Cygwin doesn't have. You can
try to figure out what that is and how to install it in Cygwin, or you can
try building without i18nsupport and see if that works better.
Also, werror=on has no effect, but it's also not the issue here.
On Thu, Feb 20, 2014 at 7:36 AM, Jane
-8, Jakob Kummerow wrote:
Wild guess: Python 3.x? Try again with 2.x
That said, the shared library build seems to be broken on Mac. A
workaround is i18nsupport=off.
On Thu, Feb 20, 2014 at 6:04 AM, Jane Chen jxch...@gmail.comjavascript:
wrote:
This is what I did:
svn co http://v8
:51 PM, Jane Chen jxch...@gmail.comjavascript:
wrote:
Jacob,
Thanks for your reply.
My Python version is 2.6.1:
Python 2.6.1 (r261:67515, Jun 24 2010, 21:47:49)
[GCC 4.2.1 (Apple Inc. build 5646)] on darwin
I just tried with the following (removing shared library
, Jane Chen jxch...@gmail.comjavascript:
wrote:
Hi Jacob,
I'll give it a try with Visual Studio. Thanks.
Things work fine for me on Linux. But as a developer, I need to support
Windows, Mac and Solaris as well. Does v8 support Solaris10 (x86-64) at
all? I didn't find a Chrome
I'm implementing a native function in V8. When I throw an error, I'd like
to include the line number in the JavaScript where my function is called.
Is there a way for me to get that?
Thanks,
Jane
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Looking at this code example in v8.h:
* The following example shows how to use a FunctionTemplate:
*
* \code
*v8::Localv8::FunctionTemplate t = v8::FunctionTemplate::New();
*t-Set(func_property, v8::Number::New(1));
*
*v8::Localv8::Template proto_t = t-PrototypeTemplate();
*
This used to work in an older version of v8, but stopped working with the
latest version of v8. So I'd still like to know the new recommended way to
achieve this.
Following the current v8 sample code, I can set a FunctionTemplate to an
ObjectTemplate. I could use that, but would like to
I know that the API has changed between v8 version 3.14 and 3.24, for
example, now you need to pass Isolate around while creating a new Context
or FunctionTemplate. I'd like to get a sense of how extensive and
fundamental these API changes are and whether there's major functionality
I have some FunctionTemplates/ObjectTemplates that take time to create. I
expect to have many concurrent Isolates. I wonder whether there's any way
to reuse or share these expensive objects among Isolates.
Thanks.
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Thanks, Ben!
Separate question: how expensive is it to construct an Isolate assuming I
don't do much with it? Once constructed, is it worth to keep around and
re-use?
Thanks,
Jane
On Thursday, March 6, 2014 10:45:16 AM UTC-8, Ben Noordhuis wrote:
On Thu, Mar 6, 2014 at 7:38 PM, Jane Chen
But looks like there's a separate heap, garbage collector, profiler managed
per Isolate?
On Thursday, March 6, 2014 3:23:44 PM UTC-8, Ben Noordhuis wrote:
On Fri, Mar 7, 2014 at 12:06 AM, Jane Chen jxch...@gmail.comjavascript:
wrote:
Separate question: how expensive is it to construct
I get NonCopyablePersistentTraits error when trying to assign or pass a
PersistentScript. Is there anyway to make it copyable?
Thanks!
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How come shell.cc doesn't set the allocator and works fine?
On Monday, March 10, 2014 2:39:20 AM UTC-7, Albert Zeyer wrote:
Ah, thanks a lot, that helped. It works now.
I wonder why it doesn't initializes such a standard allocator by default.
Also, the embedder guide should mention this.
I realize that Script is actually compiled under a specific context. Given
that, is it a good practice to cache a Script object and re-run it in
different context?
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is the
actual difference?
Jane
On Monday, March 10, 2014 3:55:24 PM UTC-7, Ben Noordhuis wrote:
On Mon, Mar 10, 2014 at 11:30 PM, Jane Chen jxch...@gmail.comjavascript:
wrote:
I realize that Script is actually compiled under a specific context.
Given
that, is it a good practice
I am creating an Isolate when needed, and trying to dispose it when done.
I wonder whether the assumption is that I have to be in an Isolate in order
to dispose an Isolate, since I'm getting:
#
# Fatal error in ../src/isolate.h, line 452
# CHECK(isolate != __null) failed
#
C stack trace
I'm getting intermittent abortion when calling
context-SetAlignedPointerInEmbedderData():
#
# Fatal error in ../src/api.h, line 401
# CHECK(allow_empty_handle || that != __null) failed
#
C stack trace ===
1: V8_Fatal
2: v8::Utils::OpenHandle(v8::Context
, Mar 13, 2014 at 6:55 PM, Jane Chen jxch...@gmail.comjavascript:
wrote:
I'm getting intermittent abortion when calling
context-SetAlignedPointerInEmbedderData():
#
# Fatal error in ../src/api.h, line 401
# CHECK(allow_empty_handle || that != __null) failed
#
C stack
, Ben Noordhuis wrote:
On Wed, Mar 12, 2014 at 8:15 PM, Jane Chen jxch...@gmail.comjavascript:
wrote:
I am creating an Isolate when needed, and trying to dispose it when
done. I
wonder whether the assumption is that I have to be in an Isolate in
order to
dispose an Isolate, since I'm
?
On Thursday, March 13, 2014 11:17:33 AM UTC-7, Ben Noordhuis wrote:
On Thu, Mar 13, 2014 at 6:55 PM, Jane Chen jxch...@gmail.comjavascript:
wrote:
I'm getting intermittent abortion when calling
context-SetAlignedPointerInEmbedderData():
#
# Fatal error in ../src/api.h, line 401
with a new context every time for execution.
Jane
On Thursday, March 13, 2014 1:46:18 PM UTC-7, Ben Noordhuis wrote:
On Thu, Mar 13, 2014 at 7:56 PM, Jane Chen jxch...@gmail.comjavascript:
wrote:
You were right. context was empty. But I created it right before
accessing
:
if (check.HasOverflowed()) return;
so how could my stack be overflown?
I checked my Isolate, and I was not in context when I create this context.
Jane
On Friday, March 14, 2014 4:51:48 AM UTC-7, Ben Noordhuis wrote:
On Fri, Mar 14, 2014 at 1:57 AM, Jane Chen jxch...@gmail.comjavascript:
wrote:
Ben
?
On Friday, March 14, 2014 4:51:48 AM UTC-7, Ben Noordhuis wrote:
On Fri, Mar 14, 2014 at 1:57 AM, Jane Chen jxch...@gmail.comjavascript:
wrote:
Ben,
Can one Isolate have more than one Context? Say if I use one Context to
construct a Script, and later create another Context to execute
case.
On Saturday, March 15, 2014 9:34:29 AM UTC-7, Ben Noordhuis wrote:
On Sat, Mar 15, 2014 at 1:54 AM, Jane Chen jxch...@gmail.comjavascript:
wrote:
Again on trunk, I can only consistently reproduce this by using one
thread
to compile a script, exit the isolate, and then using
Hi All,
I am new to v8. I am trying to embed v8 in our system and use it in a
multi-threaded environment. I observe that sometimes I get stack overflow
check failing while creating a new context if I re-use an Isolate created
by another thread. This makes me wonder whether the stack_guard_
You have to be IN an isolate in order to dispose another Isolate.
On Wednesday, March 26, 2014 6:15:42 AM UTC-7, Kevin Ingwersen wrote:
Hey.
I am getting somewhat confused currently. So, I have been trying out how
to properly dispose an isolate. But whatever I try, I get an error. If I
Hi,
With a model where I always have one isolate per thread, and a thread may
serve multiple requests and live around for some time, is there any reason
why I want to Enter the isolate every time I make v8 calls and Exit
afterwards? Is there any disadvantage to always be in an Isolate even
May I know what would be the svn repository branch version for this?
On Thursday, March 27, 2014 5:40:56 AM UTC-7, Sven Panne wrote:
With the Chrome 34 stable release not too far in the future and the branch
for 35 already looming, it is a good time to give a small overview of the
recent
Ah! Thanks Ben!
I got it just after I wrote my own book-keeping for them. :-) Will check
it out anyway.
On Friday, March 28, 2014 10:32:07 AM UTC-7, Ben Noordhuis wrote:
On Fri, Mar 28, 2014 at 6:03 PM, Jane Chen jxch...@gmail.comjavascript:
wrote:
I create a v8::Object from my
Does that trigger GC?
I also learned that there's Isolate::RequestGarbageCollectionForTesting
now. Hope that'll do it, although I haven't tried it yet.
On Tuesday, April 1, 2014 8:52:42 AM UTC-7, Murat Gözcü wrote:
sorry for my missed english.
this is indirect response to your question.
Does garbage collection happen in the same thread in which
idleNotification() is called? Can garbage collection of an Isolate happens
in a separate thread when this thread is still in the Isolate?
On Sunday, April 6, 2014 8:47:47 PM UTC-7, Alex Chi wrote:
In recently, I am coding a script
I found the following documentation for Promise in version 3.24's v8.h:
/**
* An instance of the built-in Promise constructor (ES6 draft).
* This API is experimental. Only works with --harmony flag.
*/
How do I enable the harmony flag in v8?
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With v8 for any JavaScript object foo, I can call:
for (var key in foo) {print(key+:+foo[key]);};
Is there a way for me to get a callback from the above for...in loop? In
other words, can I register an interceptor callback for the for..in access
of foo?
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O, got it! Will give it a try...
Thanks a lot!
On Wednesday, May 7, 2014 2:53:12 PM UTC-7, Michael Starzinger wrote:
The NamedPropertyEnumeratorCallback in
ObjectTemplate::SetNamedPropertyHandler() is your friend.
Best regards,
Michael
On Wed, May 7, 2014 at 10:59 PM, Jane Chen
It seems to me that FunctionTemplate::Inherit does not allow multiple
inheritance, i.e., there is only one partent template and the last one
wins. Is that right?
Thanks!
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10, 2014 2:59:35 AM UTC-7, Ben Noordhuis wrote:
On Mon, Jun 9, 2014 at 10:54 PM, Jane Chen jxch...@gmail.com
javascript: wrote:
It seems to me that FunctionTemplate::Inherit does not allow multiple
inheritance, i.e., there is only one partent template and the last one
wins
Correction: I meant to say that Internal field count needs to be set on
_instance_ template for it to take effect on the instances created on
instance template. Is that right?
On Tuesday, June 10, 2014 5:28:27 PM UTC-7, Jane Chen wrote:
Thanks, Ben!
I was following the example in test
I tried using V8::ContextDisposedNotification() to trigger GC. But it
doesn't seem to do anything. Can someone explain how it is supposed to
work? I'd like to tell v8 to garbage collect everything used in the
disposed context.
Thanks!
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Huh! I called IdleNotification before ContextDisposedNotification! Now it
really makes a difference!
Thanks a lot!
On Sunday, June 15, 2014 2:14:42 AM UTC-7, Ben Noordhuis wrote:
On Sun, Jun 15, 2014 at 2:33 AM, Jane Chen jxch...@gmail.com
javascript: wrote:
I tried using V8
I need a way to throw an exception from a function callback. For this type
of exception, I don't want the script to catch it, but instead, I'd like v8
to throw it out to my system so that I can catch it and re-run the script.
Does v8 provide such an API? If not, is there some kind of
I create an Error object registered with weak callback and throw it from my
function callback. If the script has try catch and catches the error, my
weak callback is called during GC. If the script does not catch it, but
instead my TryCatch running the script catches it, my weak callback
:
On Thu, Jun 26, 2014 at 6:53 AM, Jane Chen jxch...@gmail.com
javascript: wrote:
I need a way to throw an exception from a function callback. For this
type
of exception, I don't want the script to catch it, but instead, I'd like
v8
to throw it out to my system so that I can catch
I have an object instantiated from a template, which has a class name set.
When I do instanceof on it in JavaScript, it only shows it's an object, but
not of my class. My class seems unknown. Does v8 provide a callback API
for instanceof? Or object is the best you can get?
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If I get current stack trace from StackTrace::CurrentStackTrace() from a
function created out of a FunctionTemplate, the top frame doesn't contain a
function name. Is the function created in such a way considered nameless?
For example, if I take stack trace from shell.cc::Read(), the top
: ValueIterator is not defined
at (shell):1:15
On Thursday, June 26, 2014 9:12:09 PM UTC-7, Ben Noordhuis wrote:
On Thu, Jun 26, 2014 at 6:48 PM, Jane Chen jxch...@gmail.com
javascript: wrote:
I have an object instantiated from a template, which has a class name
set.
When I do instanceof
I can't SetAlignedPointerInInternalField on
FunctionTemplate-GetFunction(), even after I SetInternalFieldCount on
FunctionTemplate-InstanceTemplate(). Is that just the way it is or am I
missing something here?
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I want to create a v8::Date object with more precision embedded, like
saving an internal field or aligned pointer, but I'd like to inherit all
the defined APIs from Date. Is there a way to do that?
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-SetClassName(bldrLabel);
global-Set(bldrLabel,bldrTemp);
var b = new XMLBuilder();
b instanceof XMLBuilder;
false
Object.prototype.toString.call(b);
[object XMLBuilder]
On Friday, June 27, 2014 3:22:14 PM UTC-7, Ben Noordhuis wrote:
On Fri, Jun 27, 2014 at 9:29 PM, Jane Chen jxch...@gmail.com
I am on v8 3.24, and I find these files under test/mjsunit/harmony:
module-resolution.js, module-parsing.js, module-recompile.js,
module-linking.js
Does it mean that import and export of modules work as demonstrated by the
tests as long as I turn on the harmony-modules and harmony-scoping
Hi All,
What's the difference between the harmony features enabled by es-staging
and the rest of the harmony-xxx ones? Is this feature group
(harmony-symbols, harmony-collections, harmony-iteration) more ready or
complete than the other harmony- ones?
Thanks,
Jane
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I'm embedding v8 3.24.
I have an object containing a Persistent handle.
Is it required that Persistent::Reset() be called within the same isolate
where the v8 object is originally created?
Is it required that all persistent handles be reset before an isolate can
be exited or destroyed?
What's the difference between This() and Holder() in FunctionCallbackInfo?
What does Callee() return? Can you show it with a JavaScript example?
Thanks!
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What is the first argument meant for in Function::Call:
LocalValue Call(HandleValue recv, int argc, HandleValue argv[]);
It seems that passing in current context's global object works for me. But
when do I need to pass in something other than that?
Thanks!
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If I create a function with a function template and set a callback, I can't
save an aligned pointer in an internal field.
If I create an object with an object template and SetCallAsFunctionHandler,
I can save an internal field, but the returned object's typeof returns an
object, not a
I'm following the example in TestTerminateOnlyV8ThreadFromThreadItself() in
test-thread-termination.cc, and it works for me:
function f() {
var term = true;
try {
while (true) {
if (term) terminate();
term = false;
}
print(not terminated.);
} catch (err) {
Ben,
I was able to get instanceof returning true following your tips. Thanks.
But it seems to me this design assumes that there is only a singleton
Function we are operating on as I'm always interacting with This, which is
the function returned from FunctionTemplate.GetFunction().
If I
,createBuilder,builder);
subTemp-Inherit(builderTemp);
return args.GetReturnValue().Set(subTemp-GetFunction());
On Saturday, October 11, 2014 4:01:23 AM UTC-7, Ben Noordhuis wrote:
On Fri, Oct 10, 2014 at 11:14 PM, Jane Chen jxch...@gmail.com
javascript: wrote:
One more try:
In my constructor
Yes, that works. But every time the callback function is called, This()
object is the same one.
On Tuesday, October 14, 2014 6:03:30 AM UTC-7, Ben Noordhuis wrote:
On Tue, Oct 14, 2014 at 7:20 AM, Jane Chen jxch...@gmail.com
javascript: wrote:
If I don't set return value, and only
Please ignore my last post. Things are working for me now.
Thanks a lot for your support Ben!
Jane
On Tuesday, October 14, 2014 6:03:30 AM UTC-7, Ben Noordhuis wrote:
On Tue, Oct 14, 2014 at 7:20 AM, Jane Chen jxch...@gmail.com
javascript: wrote:
If I don't set return value
I'm using 3.24.
I create a FunctionTemplate with my own callback function for toString:
v8::Localv8::FunctionTemplate result =
v8::FunctionTemplate::New(isolate,valueCstor);
result-SetClassName(className);
result-InstanceTemplate()-SetInternalFieldCount(VALUE_TEMP_ID_COUNT);
*
I have a program embedding v8 3.24, with iterators and generators enabled.
After the following JavaScript code runs, garbage collection is run, but
the wrapped objects returned from gen() do not get a callback:
function* gen(limit){
for (var i = 0; i limit; i++)
yield wrap(new Date());
}
I'm also interested to know what the contract is. Is checking empty handle
enough or whether I need to check both against empty handles and
isTerminating? Once TerminateExecution is called, which v8 APIs are
supposed to continue to work, which aren't?
On Friday, December 26, 2014 2:41:32 PM
it
extensively though. If anyone knows of other scenarios, please share.
Jane
On Thursday, January 15, 2015 at 3:21:01 AM UTC-8, Ben Noordhuis wrote:
On Thu, Jan 15, 2015 at 7:37 AM, Jane Chen jxch...@gmail.com
javascript: wrote:
I'm embedding v8 3.24 in my system. When running this query
UTC-8, Jane Chen wrote:
Ben,
Thanks. That actually worked for my test case. Except that my callback
is only called once with an apparent size of 1GB. So no need to tally.
That's my only chance to call TerminateExecution before it aborts.
At least that's what I saw on Linux with v3.24
.
If anyone has more insights or experience dealing with it, I'd appreciate
it if you can share them here.
On Thursday, January 15, 2015 at 2:32:30 PM UTC-8, Jane Chen wrote:
Here's the trace_gc log:
[13997] 258 ms: Scavenge 2.3 (39.2) - 1.9 (39.2) MB, 8.4 ms
[Runtime::PerformGC].
[13997
On v8 3.24:
/**
* Marks the reference to this object independent. Garbage collector is
free
* to ignore any object groups containing this object. Weak callback for
an
* independent handle should not assume that it will be preceded by a
global
* GC prologue callback or followed by
. Does that sound more promising? And is that
what V8::CreateSnapshotDataBlob enables?
On Thursday, June 4, 2015 at 4:40:02 AM UTC-7, Ben Noordhuis wrote:
On Wed, Jun 3, 2015 at 5:06 PM, Jane Chen jxch...@gmail.com javascript:
wrote:
Ben,
My question is, say if I have a function Print
Ben,
The SetAccessor() idea was great. It helped cut the context creation time
significantly.
Thanks again!
On Wednesday, June 3, 2015 at 4:06:39 AM UTC-7, Ben Noordhuis wrote:
On Wed, Jun 3, 2015 at 7:11 AM, Jane Chen jxch...@gmail.com javascript:
wrote:
I have global variables
in that
snapshot?
Jane
On Wednesday, June 3, 2015 at 4:06:39 AM UTC-7, Ben Noordhuis wrote:
On Wed, Jun 3, 2015 at 7:11 AM, Jane Chen jxch...@gmail.com javascript:
wrote:
I have global variables and global functions exposed through object
templates and function templates, which slows down
Is there serialization API for v8 CpuProfile? I'd like to generate a file
such as v8.log using --prof in my embedding application at the
granularity of a JavaScript request. What's the correct way of doing that?
My v8 version is 3.24.
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, Jun 24, 2015 at 12:36 PM, Jane Chen jxch...@gmail.com
javascript: wrote:
Is there serialization API for v8 CpuProfile? I'd like to generate a
file
such as v8.log using --prof in my embedding application at the
granularity
of a JavaScript request. What's the correct way of doing
Embedding v8 3.24.
I know how to turn on profiling using
v8::V8::SetFlagsFromString(--prof,6). How do I turn it off when done?
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I have global variables and global functions exposed through object
templates and function templates, which slows down context creation. I
wonder whether I could still leverage the custom snapshot feature to speed
up context creation with any of the following two approaches:
1) With the
Testing profiling against v8 4.6.88.
I have functions that are exposed through accessor callbacks. If a native
function is set for multiple accessor properties, the last property shows
up as the function name in the CpuProfileNode, regardless what name you set
to the function returned by the
A test case to demonstrate the issue can be found at:
https://code.google.com/p/v8/issues/detail?id=4527
On Thursday, October 29, 2015 at 3:46:21 PM UTC-7, Jane Chen wrote:
>
> Testing profiling against v8 4.6.88.
>
> I have functions that are exposed through accessor callbacks.
Ben,
In v8 4.6.88, I can no longer find src/debug-debugger.js, nor
src/{liveedit,mirror}-debugger.js. Does it mean that the function-based
API is also deprecated and removed?
Jane
On Saturday, March 14, 2015 at 3:53:55 AM UTC-7, Ben Noordhuis wrote:
>
> On Sat, Mar 14, 2015 at 8:30 AM, Deguo
to the embedder so it is easier to do "spot
> consulting'.
>
> What are you planning to do?
>
> On Monday, November 9, 2015 at 11:58:14 PM UTC+1, Jane Chen wrote:
>>
>> Just went to this link:
>>
>> https://chromium.googlesource.com/v8/v8/+/master/docs/de
Just went to this link:
https://chromium.googlesource.com/v8/v8/+/master/docs/debugger_protocol.md
and found that "*The message based API is no longer maintained.*"
Does that mean that users (or embedders) should no longer use the message
based API since it is no longer supported?
On
he point is that for a single function, it can only infer a single
> name.
>
> I think this is working as intended.
>
> On Thu, Oct 29, 2015 at 11:57 PM, Jane Chen <jxch...@gmail.com
> > wrote:
>
>> A test case to demonstrate the issue can be found at:
>>
>>
With the change of behavior in Iterator discussed here:
https://groups.google.com/forum/#!topic/v8-users/8LkrofVr0aA
If I have an iterator (natively defined) which supports for ... of loop,
what is the equivalent of calling next to advance it?
I hope the following js example demonstrates what
4.6.88. Just tried it in v8 shell. myIterable[Symbol.iterator].next is
undefined.
On Tuesday, November 3, 2015 at 3:40:07 PM UTC-8, Ben Noordhuis wrote:
>
> On Wed, Nov 4, 2015 at 12:17 AM, Jane Chen <jxch...@gmail.com
> > wrote:
> > With the change of behavior in It
t; http://tc39.github.io/ecma262/#sec-getiterator
>
> On Tue, Nov 3, 2015 at 5:45 PM, Jane Chen <jxch...@gmail.com
> > wrote:
>
>> 4.6.88. Just tried it in v8 shell. myIterable[Symbol.iterator].next is
>> undefined.
>>
>> On Tuesday, November 3, 2015 at
>
> On Tue, Oct 6, 2015, 21:57 Jakob Kummerow <jkum...@chromium.org
> > wrote:
>
>> Have you checked bit.ly/v8-api-changes ?
>>
>> On Tue, Oct 6, 2015 at 8:44 PM, Jane Chen <jxch...@gmail.com
>> > wrote:
>>
>>> In v8 4.7.0, Object.ForceSet
> accessor. But I assume you're doing that?
>
> On Friday, October 30, 2015 at 3:03:27 PM UTC-7, Jane Chen wrote:
>>
>> Is there anyway to use something like CreateDataProperty to override the
>> accessor so that the actual function is associated with the property,
&
ntiation
> would make perfect sense.
>
> On Saturday, October 31, 2015 at 11:03:10 AM UTC-7, Jane Chen wrote:
>>
>> Yes, the first time the property is accessed, it gets the correct native
>> function. In my accessor before I return, I have:
>>
>
stuff like dynamically loading the functions or maybe compiling JavaScript
> callbacks with your function or whatever, in which case lazy instantiation
> would make perfect sense.
>
> On Saturday, October 31, 2015 at 11:03:10 AM UTC-7, Jane Chen wrote:
>>
>> Yes, the first time th
rty produced behavior similar to what you're seeing -- my
> accessor was entered repeatedly.
>
> Is ForceSet just silently failing for you? Is it returning false?
>
> On Saturday, October 31, 2015 at 4:11:22 PM UTC-7, Jane Chen wrote:
>>
>> ForceSet worked in 3.24.
I'm seeing a behavior change regarding the above between version 3.24 and
4.7.0:
[jchen@jchen-z620 x64.release]$ ./shell --harmony
V8 version 3.24.35.33 [sample shell]
> var it = {next: function() { return {value:"foo", done:true}; }};
> for (var k of it) print(k);
>
[jchen@jchen-z620
Embedding v8 3.24. Running stress tests with 30 concurrent threads serving
JavaScript requests on one node. Got a segmentation fault in the 23rd hour
of the run at this line:
v8.h 5546:
template
Local Local::New(Isolate* isolate, const PersistentBase& that) {
return New(isolate,
In v8 4.7.0, Object.ForceSet is deprecated. What is the new recommended
way of bypassing accessors?
The use case I have is that I lazily create global objects and functions
using accessors. Once it is created, I want to reset the accessor and
force save the created objects on Global.
[jchen@jchen-z620 x64.release]$ ./shell
V8 version 4.7.0 (candidate) [sample shell]
> read();
(shell):1: Bad parameters
read();
^
#
# Fatal error in v8::ToLocalChecked
# Empty MaybeLocal.
#
Illegal instruction (core dumped)
This is with a build made with either:
make -j8 x64.debug -werror=no
> best
> -jochen
>
> On Tue, Oct 13, 2015 at 6:41 AM Jane Chen <jxch...@gmail.com >
> wrote:
>
>> Looking at v8 4.7.0, both shell.cc and d8.cc calls:
>>
>> while (v8::platform::PumpMessageLoop(platform, isolate)) continue;
>>
>> after
Looking at v8 4.7.0, both shell.cc and d8.cc calls:
while (v8::platform::PumpMessageLoop(platform, isolate)) continue;
after running a script. What's the purpose of this?
As always, thanks in advance.
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Embedding v8 3.24.
Is there any API to test whether a v8 object is a generator? I tried
GetConstructorName(), or GetConstructor(), then GetName(), neither gives me
GeneratorFunctionPropotype which I got in JavaScript using
g().constructor.name. The best I seem to get is ObjectProtoToString()
Is there a v8 c++ API to achieve this?
On Friday, August 28, 2015 at 2:17:29 AM UTC-7, Andy Wingo wrote:
On Fri 28 Aug 2015 07:05, Jane Chen jxch...@gmail.com javascript:
writes:
Embedding v8 3.24.
Is there any API to test whether a v8 object is a generator? I tried
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