mozilla.dev.tech.js-engine Google Group

RE: JS Out of memory

punee...@huawei.com (Puneet Sharma) — Mon, 04 Jan 2010 12:42:13 UT

Hi David,
This problem is consistently reproducible with Spidermonkey version of
JS 1.5, JS 1.6 and JS 1.7. The only variable is the loop count.
Platforms : Windows and Suse10Sp2
Same is reproducible with only JS_CompileScript API also.
JS 1.8Rc1 does not seems to have this problem, but I am not able to

Re: out of memory error from spidermonkey 1.7 ( not seen on 1.5 )

sandeep.d...@gmail.com (sandeep) — Mon, 04 Jan 2010 07:12:56 UT

Its implementation is simply this:
extern "C"
static JSBool
myExposedMethod (JSContext *cx, JSObject *obj, uintN argc, jsval
*argv, jsval *rval)
{
return JS_TRUE;

Re: Finding function calls in javascript source.

johnjbar...@johnjbarton.com (John J. Barton) — Sat, 02 Jan 2010 18:17:31 UT

Unfortunately after reading more on this I think this may be the only
path. Given
Expression(arguments);
then Expression could result in a computed intermediate value. We can't
compute it again in the debugger since the computation could have side
effects. We can't access it in the debugger because we don't have access

Re: Finding function calls in javascript source.

donny.viszn...@gmail.com (Donny Viszneki) — Sat, 02 Jan 2010 06:01:36 UT

On Fri, Jan 1, 2010 at 11:46 PM, John J. Barton
Sorry for being confusing. That's no special feature of the
command-line interface to the Spidermonkey interpreter:
js> try { ({}).x() } catch (e) { print(typeof e.message, e.message) }
string ({}).x is not a function
That should work as-is in Firefox.

Re: Finding function calls in javascript source.

johnjbar...@johnjbarton.com (John J. Barton) — Sat, 02 Jan 2010 04:46:47 UT

I failed to also tell you I need this to be pure Javascript. So I don't
know what to do with the observation above.
Sorry, the example was copied from a test case for Named Function
Expressions, hence the _NFE. But the names are arbitrary in any case.
jjb

Re: Finding function calls in javascript source.

donny.viszn...@gmail.com (Donny Viszneki) — Fri, 01 Jan 2010 16:07:46 UT

On Thu, Dec 31, 2009 at 4:53 PM, John J. Barton
Assuming I understand you correctly, there is already some support for
this sort of thing:
js> var foo = {}
js> function bar() { return foo }
js> function baz() { bar().x() }
js> baz()
typein:4: TypeError: bar().x is not a function
As you can see, the interpreter reports the error beautifully, giving

Finding function calls in javascript source.

johnjbar...@johnjbarton.com (John J. Barton) — Thu, 31 Dec 2009 21:53:16 UT

I want to add a "dynamic call stack" feature to Firebug. Of course
"dynamic" and "call stack" are redundant, but Firebug's current call
stack representation is "lexical" and most developers expect it to be
lexical.
To implement a dynamic call stack I need the expression that selected
the function called. For example consider:

RE: JS Out of memory

punee...@huawei.com (Puneet Sharma) — Thu, 31 Dec 2009 08:13:14 UT

Hi,
I would like to correct your testcase for required checks and have
corrected my mistake as well.
Void TestJSEngineEcmaErrorReporter
(
JSContext * hdlCtx,
Const char * pszMessage,
JSErrorReport *pstReport
)
{
Printf("\r\n Error reported : %s",pszMessage);
int main()
{
// puneet : it was typo const char *src = "function isnull{}()";

Re: JS Out of memory

dmande...@mozilla.com (David Mandelin) — Wed, 30 Dec 2009 20:02:35 UT

I tried JS 1.5 with this source code on a MacBook Pro:
------------------------------ ------------------------------ -----
int main()
{
const char *src = "function isnull{}()";
int length = strlen(src);
JSRuntime *rt = JS_NewRuntime(16 << 10);
JSContext *cx = JS_NewContext(rt, 4 << 10);
JSObject *obj = JS_NewObject(cx, NULL, NULL, NULL);

Re: JS Out of memory

dmande...@mozilla.com (David Mandelin) — Wed, 30 Dec 2009 20:02:35 UT

RE: JS Out of memory

punee...@huawei.com (Puneet Sharma) — Tue, 29 Dec 2009 06:39:25 UT

Hi,
I have reproduced, with much better scenario.

Configuration details:
1. JS context size : 4K (this problem is independent of context size)
2. Run time size : 16K (more the runtime size more time it takes to
reproduce)
3. JS version : 1.5
4: JS Script:
function isnull{}()
5. C evaluation:

Re: JS Out of memory

dmande...@mozilla.com (David Mandelin) — Mon, 28 Dec 2009 19:12:23 UT

I don't know exactly what's going on but I have a few ideas that *might*
help to get more information.
What happens if you vary these parameters? Say 2, 32, and 128MB for the
run time size, and similar variations for the context stack size?
Exactly what does that mean? 100 threads in parallel? 100 contexts on

RE: out of memory error from spidermonkey 1.7 ( not seen on 1.5 )

punee...@huawei.com (Puneet Sharma) — Mon, 28 Dec 2009 18:15:58 UT

Hi,
I am also facing JS OUT OF Memory issue in JS 1.5 and JS 1.8 both on usage
of JS functions. Can you share myExposedMethod implementation?
Similarity in our script regarding usage of functions, can help to know
cause of problem. Thanks.
Regards
Puneet
-----Original Message-----
From:
dev-tech-js-engine-bounces+eng g.puneetsharma=gmail....@lists .mozilla.org

JS Out of memory

punee...@huawei.com (Puneet Sharma) — Sat, 26 Dec 2009 06:31:24 UT

Hi,

I am getting JS OUT OF MEMORY error from the spider monkey. In my test,
I am using run time size of 8 MB and JS context stack size as 8k.
In my stress testing of my browser, where I run parallel sessions about
100 with help automated scripts, I found that after 20 mins, it start
reporting out of memory and CPU usage reaches to 100%. Here, increase in CPU

Respuesta automática

adrian.a...@hotmail.com — Wed, 23 Dec 2009 20:01:53 UT

Dear friend,I would like to introduce a really good company that mainly do the electornic products trade.Now the company is doing promotion,all of it's products are sold nearly as same as their cost.It redeners the best service to customers,it provide you original products which isgood quality,and what's more,the pricewill give you a big surprise!It is realy a good opportunity for doing shopping.Just grasp the opportunity,or there will be no more than that!The web address: (www.) kanicn.com