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norris%netscape.com 721391dfa7 Subject: 
contextClassloader problem in ScriptRuntime.java
   Date:
        Tue, 11 Apr 2000 09:45:36 -0400
   From:
        "Howard Lin" <howard@softcom.com>
     To:
        "Norris Boyd" <norris@netscape.com>
    CC:
        "Andrew Wason" <aw@softcom.com>




Hi, Norris, we are trying to create a Java class in JavaScript. When security manager is on, everything works fine. But when security
manager is off, we got an error saying the "... is not defined". The problem is that in ScriptRuntime.java, when security is on,
getContextClassLoader is null due to SecurityException and Class.forName is used to find the class, which works fine. When security
is off, ContextClassLoaderMethod is invoked to find the class. Since we use a separate thread to load third party jar files,
ContextClassLoaderMethod will throw a ClassNotFound exception.

To illustrate this problem, I wrote a simple applet, evaluating a simple js file in its paint method, which is running on a separate thread.
When security is off, I got the following:

ReferenceError: "Global" is not defined.
        at org.mozilla.javascript.NativeGlobal.constructError(NativeGlobal.java:
494)
        at org.mozilla.javascript.ScriptRuntime.name(ScriptRuntime.java, Compile
d Code)
        at org.mozilla.javascript.Interpreter.interpret(Interpreter.java, Compil
ed Code)
        at org.mozilla.javascript.InterpretedScript.call(InterpretedScript.java:
67)
        at org.mozilla.javascript.InterpretedScript.exec(InterpretedScript.java:
54)
        at org.mozilla.javascript.Context.evaluateReader(Context.java:739)
        at test.evaluate(test.java:26)
        at test.paint(test.java:16)
        at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:117)
        at java.awt.Component.dispatchEventImpl(Component.java:2447)
        at java.awt.Container.dispatchEventImpl(Container.java:1035)
        at java.awt.Component.dispatchEvent(Component.java:2307)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:287)
        at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:10
1)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:92)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:83)

When security is on, it runs fine. Or if the code moved to init method, it works fine regardless of security. We are using JDK 1.2.2.

Howard
2000-04-20 19:53:16 +00:00
..
benchmarks
js2 removed extraneous semi-colons after namespace declarations. 2000-04-20 06:20:31 +00:00
jsd
jsdj
jsj
macbuild added files: mozilla/js/src/xpconnect/src/nsScriptError.cpp 2000-04-18 02:35:06 +00:00
ref
rhino Subject: 2000-04-20 19:53:16 +00:00
semantics
src Had the wrong clazz for the root! So it was better when the caching was broken. Now it works on MI objects with caching fixed. My bad copy/paste error from long ago. 2000-04-20 12:16:45 +00:00
tests fix to include java version info on rhino(i|ms|msi) engines 2000-04-07 00:05:50 +00:00
.cvsignore
landbranch.pl
Makefile.in
makefile.win