gcj/85: Compiler optimizes away private methods when native methods might access them

[bryce at albatross dot co dot nz]

>Number:         85
>Category:       gcj
>Synopsis:       Compiler optimizes away private methods when native methods might access them
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    apbianco
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Nov 04 18:40:00 PST 1999
>Closed-Date:
>Last-Modified:
>Originator:     Bryce McKinlay <bryce@albatross.co.nz>
>Release:        19991104
>Organization:
>Environment:
linux
>Description:
When attempting to compile libgcj with optimization (-O2),
native methods which attempt to access certain private
static methods fail to link.

For example:
.libs/libgcj.so: undefined reference to
`java::net::InetAddress::checkConnect(java::lang::String *)'
>How-To-Repeat:
The following test code also demonstrates the problem. It
works ok without optimization, but with -O it fails to link:

// java
public class A
{
  public static void main(String args[])
  {
    new A();
  }
  
  public A()
  {
    a();
  }
  
  native void a();
  
  private void b()
  {
    System.out.println("ok");
  }
}

// c++
#include <gcj/cni.h>
#include "A.h"

void A::a()
{
  b();
}
>Fix:
gcj should not optimize away private methods when native
methods exist in the class.
>Release-Note:
>Audit-Trail:
>Unformatted: