Re: Method.invoke() on a non-public class from another package

[Andrew Haley <aph at gcc dot gnu dot org>]

Andrew Haley writes:
 > Andrew Haley writes:
 >  > Robert Lougher writes:
 >  > 
 >  >  > Had a quick look, and in Classpath-0.93 java.util.AbstractMap contains
 >  >  > a class BasicMapEntry which implements getValue().  BasicMapEntry is
 >  >  > package-private.  This isn't accessible outside the package.
 >  >  > 
 >  >  > In CVS HEAD, this has changed and java.util.AbstractMap contains a
 >  >  > class SimpleEntry which implements getValue().  SimpleEntry is public.
 >  >  >  Obviously, this is accessible...
 >  > 
 >  > OK, thanks.  I'm working on a gcj patch now.
 > 
 > Done.

Eww, this doesn't work for private inner classes.  We must allow
access to private classes but not package-private classes in other
packages.

Here's something better.

Andrew.


2007-04-11  Andrew Haley  <aph@redhat.com>

	* java/lang/reflect/natMethod.cc (Method::invoke): In invoke also
	check that the method's declaring class is accessible.

Index: natMethod.cc
===================================================================
*** natMethod.cc	(revision 123473)
--- natMethod.cc	(working copy)
***************
*** 173,184 ****
      }
  
    // Check accessibility, if required.
!   if (! (Modifier::isPublic (meth->accflags) || this->isAccessible()))
      {
        Class *caller = _Jv_StackTrace::GetCallingClass (&Method::class$);
        if (! _Jv_CheckAccess(caller, declaringClass, meth->accflags))
  	throw new IllegalAccessException;
      }
  
    if (declaringClass->isInterface())
      iface = declaringClass;
--- 173,202 ----
      }
  
    // Check accessibility, if required.
!   if (! this->isAccessible())
!     {
!       if (! (Modifier::isPublic (meth->accflags)))
  	{
  	  Class *caller = _Jv_StackTrace::GetCallingClass (&Method::class$);
  	  if (! _Jv_CheckAccess(caller, declaringClass, meth->accflags))
  	    throw new IllegalAccessException;
  	}
+       else
+ 	// Method is public, check to see if class is accessible.
+ 	{
+ 	  jint flags = (declaringClass->accflags
+ 			& (Modifier::PUBLIC
+ 			   | Modifier::PROTECTED
+ 			   | Modifier::PRIVATE));
+ 	  if (flags == 0) // i.e. class is package private
+ 	    {
+ 	      Class *caller = _Jv_StackTrace::GetCallingClass (&Method::class$);
+ 	      if (! _Jv_ClassNameSamePackage (caller->name,
+ 					      declaringClass->name))
+ 		throw new IllegalAccessException;
+ 	    }
+ 	}
+     }
  
    if (declaringClass->isInterface())
      iface = declaringClass;