Re: Rhino 1.5R2 release candidate
Date:
Fri, 13 Jul 2001 22:52:43 -0700
From:
Christopher Oliver <coliver@mminternet.com>
Organization:
Primary Interface LLC
To:
Norris Boyd <nboyd@atg.com>
References:
1
Hi Norris,
Attached are some (final?) changes to the debugger:
- Display NativeCall objects as "[object Call]" in this/locals tree-tables
- Fixed "Go to Function" to highlight the target function in the source
window
- Synchronized ContextListener implementation
- Added slightly more useful tooltips to the tool bar
Note I modified files from today's rhinoTip.zip. Hopefully they were
identical to those in the cvs release branch.
Chris
Rhino: deal with all Throwables in Interpreter.interpret
Date:
Thu, 12 Jul 2001 14:27:34 +0200
From:
Igor Bukanov <igor@icesoft.no>
Organization:
Wind River
To:
Norris Boyd <nboyd@atg.com>
The attached patch modifies the catch code in Interpreter.interpret to
catch general Throwable exceptions to allow cleanup after throwing an
Error instance from Context.observeInstructionCount.
===================
Subject:
Rhino: change of InterpreterData.itsLineNumberTable from Hahstable to
UintHash
Date:
Thu, 12 Jul 2001 15:51:38 +0200
From:
Igor Bukanov <igor@icesoft.no>
Organization:
Wind River
To:
Norris Boyd <nboyd@atg.com>
The patch linetable_patch changes InterpreterData.itsLineNumberTable
from Hahstable to UintHash and debug/DebuggableScript.java to return
int[] array instead of Enumeration. It was run produced via
diff -ru javascript.0 javascript
The patch debugger_patch contains update for
toolsrc/org/mozilla/javascript/tools/debugger/Main.java to reflect above
api changes.
===============================
Subject:
Rhino: patch not to store VariableTable in InterpreterData
Date:
Thu, 12 Jul 2001 16:34:18 +0200
From:
Igor Bukanov <igor@icesoft.no>
Organization:
Wind River
To:
Norris Boyd <nboyd@atg.com>
The patch removes the "VariableTable itsVariableTable" field from
InterpreterData so it would not be stored in
InterpretedFunction/InterpretedScript and could be garbage collected
after interpreter byte code generation is finished. The usage of
theData.itsVariableTable it Interpreter.interpret is replaced by
accessing argNames/argCount fields from the passed NativeFunction.
Subject:
Fatal error executing in IBM J9 VM
Resent-Date:
Mon, 9 Jul 2001 15:35:32 -0700 (PDT)
Resent-From:
mozilla-jseng@mozilla.org
Date:
9 Jul 2001 15:33:38 -0700
From:
bdemchak@tpsoft.com (Barry Demchak)
Organization:
http://groups.google.com/
To:
mozilla-jseng@mozilla.org
Newsgroups:
netscape.public.mozilla.jseng
Hi --
I've encountered an error in either Rhino or the IBM J9 VM's runtime
support -- I'm not sure which -- but the end result is an unhandled
exception. I'm quite willing to believe that it's already been dealt
with. If so, will someone point me to the solution?
I'm using: IBM's J9 on Windows 2000,
IBM's IDE v1.3 on Windows 2000,
Rhino v1.5 from mozilla.org
The exception is java.lang.StringIndexOutOfBoundsException.
It occurs in Context.getSourcePositionFromStack just after the call to
RuntimeException.printStackTrace. The code is expecting a code
reference that looks something like "(Example.js:50)" where "50" is
the line number. (I gather that's what the Sun VM returns???)
Instead, J9 is returning a code reference that looks like:
"java.lang.RuntimeException\n\n\n\nStack trace:\n\n
java/lang/Throwable.<int>()V\n\n" etc, etc, etc.
The error occurs because the Colon variable's value is less than the
Open variable's value in Context.getSourcePositionFromStack. When the
s.substring is evaulated, there's a negative string length ... boom.
I've patched an "if" statement in the getSourcePositionFromStack code
so that instead of:
if (c == '\n' && open != -1 && close != -1 && colon != -1)
I have:
if (c == '\n' && open != -1 && close != -1 && colon != -1 && open <
colon && colon < close)
Certainly, there's a better fix, but it's sufficient to keep me going.
So, I have several questions ... being new to open source and this
forum:
1) Is this a real bug ... a real Rhino bug??
2) Has this already been found?
3) Has this already been fixed?
4) If not, what's the proper protocol for reporting it?
5) What's the proper protocol for fixing it?
This shows up *very* quickly when trying to run a script under J9.
When it occurs, Rhino is trying to issue a warning about some shady
JavaScript code.
If this is a real bug and hasn't been fixed, I would infer that there
aren't a lot of people trying to run this under J9. Would that be a
fair statement? If so, can anyone comment as to why that would be??
Thanks!
Rhino: Fixes for catch in Interpreter.interpret
Date:
Wed, 11 Jul 2001 19:06:46 +0200
From:
Igor Bukanov <igor@icesoft.no>
Organization:
Wind River
To:
Norris Boyd <nboyd@atg.com>
Hi, Norris!
When doing that instruction counting implementation, I managed to mess
up code in the catch statement in Interpreter.interpret.
First for some reason I assumed that for a general RuntimeException the
previous code do not run finally statements but only script catch code.
Of cause this was wrong: that code skipped catch for arbitrary exception
while calling finally.
This is a reasonable behavior especially given the fact that arbitrary
RuntimeException may only arise from, say, bugs, other exceptions should
be wrapped to JavaScriptException.
Second I removed calls to debug.handleExceptionThrown...
The attached patch restores the original catch/finally logic and re-adds
calls to debug.handleExceptionThrown.
I will later update it that catch to handle Error as well to allow
cleanup after throwing an Error instance from
Context.observeInstructionCount , but restoration should go first.
Regards, Igor
Also, accept patches from Igor:
Subject:
Rhino: UintMap optimization
Date:
Fri, 06 Jul 2001 13:14:49 +0200
From:
Igor Bukanov <igor@icesoft.no>
Organization:
Wind River
To:
Norris Boyd <nboyd@atg.com>
Hi, Norris!
Currently omj.Node uses Hashtable to map int property types to
objects/integer. In my opinion this is very inefficient: to store single
int property it creates 5 objects: one for property Hahstable, 2 Integer
wrappers for property/value, array to sore Hahstable slots and Hashtable
slot itself. To fix this I added omj.UintMap class that can map
non-negative integers to objects or integers and modified omj.Node to
use it. The class is a hashtable implementation that uses one int[] and
one Object[] arrays to store keys/values and Object[] array is not
created if the map contains only integers.
To take full advantage of omj.UintMap code has to be modified to use
Node.getIntProp/Node.putIntProp to store int properties, but even in
this form it is a win.
I can provide patches to use Node.getIntProp/Node.putIntProp and UintMap
for InterpreterData.itsLineNumberTable if this is OK.
Regards, Igor
Mon, 02 Jul 2001 12:58:44 +0200
From:
Igor Bukanov <igor@icesoft.no>
Organization:
Wind River
To:
Norris Boyd <nboyd@atg.com>
Hi, Norris!
It turned out that in our browser implementation we need to be able to
abort too-long-running scripts. I implemented that for interpreter mode
via instruction counter callback. This callback is called at branch
points after instruction counter reach certain threshold as you
suggested once in mozilla-jseng mail list. The attached patch adds to
Context.java:
public int getInstructionObserverThreshold() {
return instructionThreshold;
}
public void setInstructionObserverThreshold(int threshold) {
instructionThreshold = threshold;
}
protected void observeInstructionCount(int instructionCount) {}
...
int instructionCount;
int instructionThreshold;
where observeInstructionCount is a callback that should be overwritten
in a custom Context to observe execution.
Then as long as instructionThreshold is not 0 modifications to
Interpreter.java increase instructionCount at branches/function
calls/catch blocks and call cx.observeInstructionCount when it reaches
instructionThreshold. I also replaces 3 catch statements in
Interpreter.interpret for EcmaError, JavaScriptException and
RuntimeException by single one to reduce code duplication.
The patch lacks documentation in Context.java but I would add that later
if the patch is ok.
Regards, Igor
==========================
Subject:
Re: Working for Rhino
Date:
Tue, 3 Jul 2001 10:41:42 +0200
From:
felix.meschberger@day.com
To:
Norris Boyd <nboyd@atg.com>
Hi Norris,
Well, I couldn't wait ;-) Here are my diffs :
LazilyLoadedCtor: Make class and constructor public for use on my host
objects
NodeTransformer : Replace checks for "arguments" by call to
checkActivationNeeded() in Context
Context: Add the name list proposed as a hashtable with
adder/checker/remover methods
Hope this helps. Regards
Felix
move debug object counters and various constructors to jsd_xpc.cpp
add LiveEphemeral struct to reperesent a link in a PRCList of ephemeral objects.
declare jsdIEphemeral interface in objects that need it, add invalidaAll static method to jsdIProperty and jsdIValue. jsdIObject still needs work.
Large changes to improve the way we deal with our wrappers around js engine structures. jsdIScript, jsdIStackFrame, jsdIValue, and jsdIProperty interfaces now inherit from a new interface "jsdIEphemeral". This interface is used to invalidate the wrapper. Once the wrapper is invalidated, *most* methods throw NS_ERROR_NOT_AVAILABLE, some interfaces, such as jsdIScript, cache important information so that the wrapper isn't utterly useless once it has been invalidated. The boolean isValid attribute can be used to see if the wrapper is still valid.
factor debug object counters into some simple macros
add new velid assertion macros for the new ephemeral objects
add utility functions for dealing with PR_CLISTs full of ephemeral objects.
invalidate the jsdIFrame after the execution hook completes
move some c/dtors from jsd_xpc.h over here to avoid exposing debug object counters, and repeating some macros
fix incorrectly set out parameter in getValue::GetDoubleValue
Subject:
Re: Rhino: [[DefaultValue]] missing for Call object
Resent-Date:
Mon, 2 Jul 2001 08:52:07 -0700 (PDT)
Resent-From:
mozilla-jseng@mozilla.org
Date:
Mon, 02 Jul 2001 11:49:59 -0400
From:
Norris Boyd <nboyd@atg.com>
Organization:
Art Technology Group
To:
Christopher Oliver <coliver@mminternet.com>
CC:
mozilla-jseng@mozilla.org
References:
1
I believe the correct result of the script should be
[object global]
[object Object]
[object global]
The activation object (which goes by the name of "Call" for historical
reasons) should never be the 'this' value in a function call. See "10.1.6
Activation Object" in the ECMA spec.
I'll look at fixing the problem for Rhino. If there's agreement on my
analysis, someone should fix this for Spidermonkey too.
--N
Christopher Oliver wrote:
> Hi,
>
> function a() {
> function b() {
> print(this);
> }
> this.f = function() {
> print(this);
> b();
> }
> b();
> }
>
> var a = new a();
> a.f();
>
> Running the above script with SpiderMonkey produces:
>
> [object global]
> [object Object]
> [object Call]
>
> Running with Rhino produces the following exception:
>
> uncaught JavaScript exception: undefined: Cannot find default value for
> object. (line 3)
>
> This is due to a bug in org.mozilla.javascript.NativeCall which doesn't
> implement toString or valueOf or override getDefaultValue.
> However, even after I hacked in an implementation of getDefaultValue in
> NativeCall, Rhino still produces a different result then spidermonkey:
>
> [object Call]
> [object Object]
> [object Call]
Re: Bug in RhinoTip
Resent-Date:
Sat, 30 Jun 2001 11:45:38 -0700 (PDT)
Resent-From:
mozilla-jseng@mozilla.org
Date:
Sat, 30 Jun 2001 20:54:21 +0200
From:
Igor Bukanov <igor@icesoft.no>
Organization:
Wind River
To:
nboyd@atg.com
CC:
Christopher Oliver <coliver@mminternet.com>, mozilla-jseng@mozilla.org
References:
1
Christopher Oliver wrote:
> Hi,
>
> I noticed the following in today's rhinoTip:
>
> js> throw 100
> js: uncaught JavaScript exception: java.lang.Object@5d601f
>
> js> throw 200
> js: uncaught JavaScript exception: java.lang.Object@5d601f
>
> js> throw i = 100
> js: uncaught JavaScript exception: 100
The attached patch to omj/Interpreter.java fixes that: I forgot to check
for stack[stackTop] == DBL_MARK during throw when implemented
interpreter optimization to minimize number of created Double instances.
I think that example should go to the test suite in a form like:
try { throw 100; } catch (ex) { return ex == 100; }
Regards, Igor
Bugfix to Rhino Debugger
Date:
Sat, 30 Jun 2001 06:09:44 -0700
From:
Christopher Oliver <coliver@mminternet.com>
Organization:
Primary Interface LLC
To:
nboyd@atg.com
Hi Norris,
Attached is a fix to a problem I encountered with the Rhino debugger.
Apparently some recent changes to the engine broke the debugger because
the debugger wasn't acquiring a Context before making certain engine
calls like ScriptableObject.getIds(). You can see this by stepping
through the "enum.js" example and expanding the variable "elements".
The below exception trace will be printed on the debugger console. The
attached file should fix this problem.
Chris
Subject:
Another fix to VariableModel.java
Date:
Sat, 30 Jun 2001 07:33:51 -0700
From:
Christopher Oliver <coliver@mminternet.com>
Organization:
Primary Interface LLC
To:
nboyd@atg.com
Hi Norris,
I modified this file to always call Context.toString() to display a
variable's value in the the tree table. Previously it only called it
for Scriptables and the toString() method of the object otherwise. This
caused for example JavaScript "2" to be displayed as "2.0".
Chris
This removes all call-sites I can currently fix. Tomorrow I'll try to get someone to checkin my changes to security/ and I'll get some help with the Netscape side of things.
nsString::GetUnicode()'s final death-blow will be dealt soon. Please keep this in mind as you add new code :-)
Rhino: speed optimization in omj/Interpreter.java
Date:
Tue, 26 Jun 2001 21:06:56 +0200
From:
Igor Bukanov <igor@icesoft.no>
Organization:
Wind River
To:
Norris Boyd <nboyd@atg.com>
Hi, Norris!
The attached Interpreter_patch contains a speed optimization patch that
tries to avoid creation of Double objects by keeping a parallel stack
for double values: instead of putting Double to the stack, DBL_MRK is
put and the real value is put to double stack (sDbl). Then when reading
stack with DBL_MRK, the double value from the double stack is used
wrapped to Double object when necessary. In addition local and vars
arrays are merged to stack array.
The attached before.txt and after.txt contain results of typical runs of
mozilla/js/benchmarks/all_bench.js before and after optimization on my
PC: Athlon 650/Red Hat 7.0/JDK 1.3.0 from Sun .
In number of cases the optimization actually slow down the executionby
5-10% (I guess due to the checks for DBL_MRK), but mostly it is a nice
sped up often by factor of 2 ot more with overall optimization win: 267
versus 218 seconds.
I guess it is possible to apply the same optimization to the optimizer
package, but in our browser we use strictly interpreter mode. Also by
changing signature of call/construct methods in Scriptable it is
possible to avoid creation of almost all objects currently allocated
during method calls, but that is for far future.
Regards, Igor
declare and initialize new provate members in jsdScript, copy important script properties at jsdScript creation time, so they're around after Invalidate().
large changes to fix the following bugs:
82684, crash manually clearing breakpoint
*actually* clearing mValid in jsdScript::Invalidate fixed this one.
85636, assertions on quiting venkman
jsdService::Off now disconnects the hooks into JSD, to avoid calling back into js after that. It also processes any pending script delete events that occurred during the last GC. The code to process the gPendingScripts list has been factored out of the gc callback. Processing the dead script list allows us to properly finalize all of the jsdIScript object, which seems to clear up the "gc roots exist at shutdown" assertions. In effect, these changes get rid of *all* of the jsd related assertions on exit.
Added isOn attribute to jsdIService.
Added isValid attribute to jsdIScript. We now prefetch appropriate properties from the underlying JSDScript, so that it's available after the script is Invalidate()d
moved jsdService constructor to jsd_xpc.h
Save the runtime passed to OnForRuntime so we can use it to clear the GC Gallback in Off().
xpconnect had been printing it's large "js component threw exception" whenever chatzilla's socket code threw NS_BASE_STREAM_WOULD_BLOCK from it's streamprovider (a non-error nsresult, bah.) This patch adds the exception to the "suppression list", to quiet the debug message.
I looked into this somewhat and I noticed the following:
1) There is a bug in Interpreter.java, line 1695. It sets the variable "i" to
the line number of the special call, but overwrites it on line 1699. It then
passes this value to ScriptRuntime.callSpecial
2) In "generateScriptICode" in Interpreter.java the variable
itsData.itsSourceFile fails to be set to itsSourceFile. This causes a null
source file name to be passed to handleCompilationDone when "Widget.js" is
compiled. That is why you
initially see "<stdin>, line 6" when the debugger comes up (the debugger
interprets a null source name as "stdin"). I simply modified it as follows
(this might not be the right thing to do?):
private InterpretedScript generateScriptICode(Context cx,
Scriptable scope,
Node tree,
Object securityDomain)
{
itsSourceFile = (String) tree.getProp(Node.SOURCENAME_PROP);
itsData.itsSourceFile = itsSourceFile;
...
and that corrected the problem.
However there seems to be no way for the debugger to detect that the script
passed to handleCompilationDone() is the argument of an "eval()". So I modifed
NativeGlobal.evalSpecial() to munge the filename to indicate this (by appending
"(eval)" to it). That way a separate window is created in the debugger to hold
the compiled eval code. This is probably not be the best way to solve the
problem.
I have attached the files I modified.
Cheers,
Chris
Simon Massey wrote:
> Christopher,
>
> Attached is the code that trips the debugger up. The debugger comes up. You
minimize the console to reveal Widget.js file window. You click 'Go'. The
Widget.js window looses all the code in it and is just replaced by the evaluated
code:
>
> this.invokedByEval()
>
> The rhino tip I have is rhino15R2pre.zip
>
> I am running it with the command:
>
> start javaw org.mozilla.javascript.tools.debugger.JSDebugger -f Widget.js -f
Main.js
>
> using the JVM:
>
> java version "1.3.0"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
> Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)
>
> on Win2k.
>
> Just in case you are wondering why on earth my code wants to do this, it is
because I want to do some introspection. The real Widget invokes all its methods
that have a particular substring in their names:
>
> for( key in this ){
> if( key.indexOf('reflect') == 0 ){
> var evalStr = "this."+key+"()";
> eval(evalStr);
> }
> }
>
> Thanks for the great code. I have the real Widget stabilized and am happily
using the debugger on my other files.
>
> Thanks again!
>
> Simon Massey
>
Changes allow us to have a finer control over which parts of the tree are built with PIC. Part of the static build branch landing.
Bug #46775 r=mcafee a=leaf
jsdoc.js - added simple support for methods
Date:
Thu, 14 Jun 2001 09:12:26 +0100 (GMT Daylight Time)
From:
Simon Massey <simon_massey@hotmail.com>
To:
<nboyd@atg.com>
First off let me say thanks a lot for rhino. It is a really excellent piece
of software.
I am writing a large piece of js for making Excel2000 htm interactive on IE
and other browser such as Netscape6. Use a alot of code OO using methods
along the lines of:
/**
* Constructor
*/
function Type(x){
this.x = x;
}
/**
* Method
*/
Type.prototype.getX = function(){
return x;
}
var type = new Type('a');
var a = type.getX();
I have added to jsdoc.js so that finds and documents the method
declarations.
Attached is my modified jsdoc.js and a sample of the html that it generates
for the some of our proprietry :-( "Axel" code.
As an aside have you seen the job that www.blox.com have done on making a
dhtml spreadsheet? Bet they wished they could use exceptions in Netscape4!
Looking forward to the production JSDebugger. The tip version is great. It
does however seem to trash the view that it has of a file when an eval call
is made in that file. Is there a work around or will I have to wait till
the production version?
Thanks Again!
Simon Massey
-----
The patch adds to NativeArray.put a check for (this == start) so the
length field or a dense array element would not be updated if this !=
start. The following script exposes the problem:
function Test() { }
var array = new Array(0, 0); // Trigger dense mode
Test.prototype = array;
var test = new Test();
array[0] = 1;
test[0] = 2;
print(array[0]); // Should print 1, not 2
-----
When initially I switched NativeDate to use IdScritable, I made
toGMTString just an alias to toUTCString. Later I realized that it could
cause troubles if someone would check Date.prototype.toGMTString.name to
get "toUTCString" so I made the code to allocate a separated IdFunction
to toUTCString. Now when I read ecma 3 appendixes I see that the initial
behavior is what actually Ecma 3 requires. Here is an extract from B.2.6:
The Function object that is the initial value of
Date.prototype.toGMTString is the same Function
object that is the initial value of Date.prototype.toUTCString.
Sometimes doing nothing is the best solution...
The attached patch fixes that and inlines many 1-3 lines functions as
optimization that java compilers typically do not want to do...
1. Keyword search via Java Hahstable is replaced by explicit "switch"
code generated by idswitch tool. It not only speed up keyword search and
eliminates all Integer objects created to hold keyword tokens and
corresponding Hahstable structures, but it also reduces code size due to
very poor array initialization support in JVM.
2. It replaces the isXDigit method by xDigitToInt that either converts
its argument to 0..15 or returns -1 if it is not a hex digit and updates
the method usage accordingly The patch updates NativeGlobal.js_unescape
to reflect this usage change.
In the attached patch I added documentation, did some inlining in the
get method implementation to gain some speed and overrode defineProperty
so it plays better with id-based properties.
