Bug ID: JDK-4136116 Solaris and Solaris x86: SEVERE memory leak when using PopupMenus

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1.2.0 1.2fcsFixed

The interim fix for BugId 4062024 has introduced a major memory leak involving
PopupMenus. Any Frame, Window, or Dialog which contains one or more PopupMenus
will never be garbage collected because of a JNI global ref which is never
cleaned up. Since the top-level container has references to all of its children,
none of the children will ever be garbage collected either. This is potentially
every Component in the application. We cannot ship the FCS product in this
state.

Note that we also cannot correct this problem unless we correct the underlying
problem with 4062024. The work which Mike Bronson has been doing for CBOT
should do this.

CONVERTED DATA BugTraq+ Release Management Values COMMIT TO FIX: generic FIXED IN: 1.2fcs INTEGRATED IN: 1.2fcs
14-06-2004
SUGGESTED FIX The fix is trivial. We need to uncomment the awtJNI_DeleteGlobalRef line in Java_sun_awt_motif_MPopupMenuPeer_pDispose: From sun.awt.awt_PopupMenu.c: JNIEXPORT void JNICALL Java_sun_awt_motif_MPopupMenuPeer_pDispose (JNIEnv env, jobject this) { struct MenuData mdata; AWT_LOCK(); mdata = (struct MenuData ) JNU_GetLongField(env, this, "pData"); if (mdata == 0) { AWT_UNLOCK(); return; } XtDestroyWidget(mdata->comp.widget); free((void ) mdata); JNU_SetLongField(env, this, "pData", 0); /* UNCOMMENT THIS LINE TO FIX PROBLEM / / awtJNI_DeleteGlobalRef(env, this); */ AWT_UNLOCK(); }
11-06-2004
PUBLIC COMMENTS Any Frame, Window, or Dialog which has at least one PopupMenu will never be garbage collected, nor will any of its children. This is potentially every Component in the application.
10-06-2004
EVALUATION The changes made by Mike Bronson and the additional work done for 4083400 has corrected the underlying problem. I uncommented the line which deletes the JNI global ref. david.mendenhall@eng 1998-06-23
23-06-1998

Relates :	JDK-4062024 - Selecting an item from a popup menu list causes a core dump
Relates :	JDK-4085578 - Frame with MenuBar are not garbage collected