26875 - Java applets's stop method is not called during page switch

Status: VERIFIED DUPLICATE of bug 27486

(Core Graveyard :: Plug-ins, defect, P3)

Description

[stanley.ho]

When you switch between a page in Mozilla, NPL_EmbedDelete in 
modules\plugin\src\npglue.cpp is never called anywhere from the browser. Thus, 
it doesn't stop the applet during page switch. As a result, the applet keep 
running, but the parent window is already destroyed by the browser. AWT will 
access a non-exist parent window in the native code, and that's will result in 
NULL pData exception in Java. The fix is definitely to hook up the browser with 
NPL_EmbedDelete during page switch. Otherwise, Java applets will run very 
unstable in Mozilla.

This bug also exists for all generic plug-in support, so the plug-in is never 
being called to clean up itself during page switch.

Comment 1

[shrirang khanzode]

Hmm..i wonder if this is the same reason for the browser to crash after I run an 
embedded plugin on a page and then try to go to another page.

Comment 2

[av (gone)]

modules\plugin\src\npglue.cpp is not part of Mozilla build. All relevent stuff 
sits in modules\plugin\nglsrc

Comment 3

[stanley.ho]

In modules\plugin\nglsrc\nsPluginHostImpl.cpp, plug-in is never called to stop 
either.

Comment 4

[ekrock's old account (dead)]

Marking beta1 as 23672, which is approved PDT+ for beta1, depends on this.

Comment 5

[leger]

Putting on PDT- radar for beta1.  Won't hold beta for this.

Comment 6

[av (gone)]

Stanley, mInstance->Stop() is called during destruction of the object frame.

Comment 7

[stanley.ho]

Java Plug-in doesn't seem to get called through. Would you please point me to 
the exact file that mInstance->Stop is called?

Comment 8

[av (gone)]

Look at nsPluginInstanceOwner::~nsPluginInstanceOwner() in
layout/html/base/src/nsObjectFrame.cpp

Comment 9

[edburns]

These are the same bug.

*** This bug has been marked as a duplicate of 27486 ***

Comment 10

[Paul Wyskoczka]

Marking verified