The File.length() method was returning a signed 32-bit value
on 32-bit Windows systems. This was causing an integer overflow
on file sizes greater than 2 GB. This appears to be caused by
the way Windows handles the STAT() function. This patch checks
whether the current platform is Windows then uses the Windows API
to get the correct file size and return it as a jlong.
We now properly forward the errno value from the child when execvp()
fails, which the parent then uses to for the errno message as well as
including the failed command's name in the message.
We must throw an AbstractMethodError when such a call is executed (not
when the call is compiled), so we compile this case as a call to a
thunk which throws such an error.
Previously, Deflater.deflate would pass Z_SYNC_FLUSH to zlib
unconditionally, which caused the output to be enormous when setInput
was called repeatedly with very small input buffers. In order to
allow zlib to buffer output and thereby maximize compression, we must
use Z_NO_FLUSH until Deflater.finish is called, at which point we
switch to Z_FINISH. We also modify DeflaterOutputStream.close to call
Deflater.finish and write any remaining output to the wrapped stream.
Internally, the VM augments the method tables for abstract classes
with any inherited abstract methods to make code simpler elsewhere,
but that means we can't use that table to construct the result of
Class.getDeclaredMethods since it would include methods not actually
declared in the class. This commit ensures that we preserve and use
the original, un-augmented table for that purpose.
The result of Class.getInterfaces should not include interfaces
declared to be implemented/extended by superclasses/superinterfaces,
only those declared by the class itself. This is important because it
influences how java.io.ObjectStreamClass calculates serial version
IDs.
OpenJDK's java.lang.ClassLoader.getResource makes use of
sun.misc.Launcher to load bootstrap resources, which is not
appropriate for the Avian build, so we override it to ensure we get
the behavior we want.
