JamVM

File Release Notes and Changelog

Release Name: JamVM 1.5.3

Notes:
JamVM 1.5.3 is primarily a bug-fix release.  It fixes issues seen
while running Eclipse 3.4.2 and JRuby 1.2.0RC2, and adds some minor
features.


Changes:
A summary of the changes since 1.5.2:

- Zip/Jar support in the boot classloader has been rewritten to
  no longer require the Zip/Jar files to be mmap-ed read/write.
  This increases shareability between multiple VM instances, and
  improves memory-usage on embedded systems.

- JNI invocation API:
  - set thread-self to NULL when thread detaches (if the thread tries
    to re-attach, it appears to still be attached)

  - init args_count in dummy stack frame (fix problem if the thread
    detaches and then re-attaches)
 
- Do not create a library unloader for libraries loaded by the bootstrap
  loader if they have an JNI_OnUnload method (the bootstrap loader is
  never unloaded, and so they will never be called).  Fixes a SEGV with
  JRuby.

- Fix to annotation handling.  When the annotation value is an array,
  the native annotation parser constructs an Object array.  However,
  the method return value is the specific type.  This leads to an
  AnnotationTypeMismatchException.  The fix coerces the Object
  array to the correct type.

- Simple implementation of java.lang.management.VMManagementFactory
  (returns no memory pool, memory manager or GC names).  Sufficient
  to run JRuby.

- Implemented package support in the bootstrap class loader.  Package
  information is obtained from the manifest file if it exists.  However,
  GNU Classpath's glibj.zip's manifest has no package information.
  The class library is therefore recognised by the presence of
  java/lang/Object.class, and appropriate package information is
  constructed.

- Fix broken implementation of VMClass.getSimpleName() (use the
  implementation from gcj)

- Default Java stack size increased to 256K from 64K

- Fix to bootstrap loader getResources() when the bootclasspath
  entry is relative (prepend the current working directory)

- Fix minor memory leak in bootstrap loader getResources()

- Add --enable-tls option to configure, enabling thread-local-storage
  (__thread) to be disabled