[Bug java/41901] New: gcj -C -ftarget 1.1 produces bytecode that doesn't work in JDK 1.1

["bens at alum dot mit dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

gcj -C -ftarget 1.1 produces output that doesn't work in Sun JDK 1.1.8, as
tested under Wine.  The problem is that the bytecode produced for a
synchronized() block is not accepted by the VM.  Upon encountering this
bytecode, the VM either (1) prints "nonfatal internal JIT (3.00.078(x)) error
'chgTarg: Conditional' has occurred ... Interpreting method" or (2) fails to
synchronize correctly and instead throws java.lang.IllegalMonitorStateException
in an infinite loop.

While this is clearly not ideal behavior for the VM, this VM defines the 1.1
target, so -ftarget 1.1 should produce bytecode that actually works.

Sun introduced a similar bug into their javac starting in JDK 1.4, and has
failed to fix it, leaving no good way to produce backwards-compatible bytecode.
See:

http://forums.sun.com/thread.jspa?threadID=196703&forumID=37
http://lists.apple.com/archives/Java-dev/2002/Jun/msg00977.html
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4017866


-- 
           Summary: gcj -C -ftarget 1.1 produces bytecode that doesn't work
                    in JDK 1.1
           Product: gcc
           Version: 4.3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: java
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bens at alum dot mit dot edu
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41901