gij - GNU interpreter for Java bytecode

gij [OPTION] ... JARFILE [ARGS...]

gij [-jar] [OPTION] ... CLASS [ARGS...] [-cp path] [-classpath path] [-Dname[=value]...] [-ms=number] [-mx=number] [-Xargument] [-verbose] [-verbose:class] [--showversion] [--version] [--help][-?]

CWgij is a Java bytecode interpreter included with CWlibgcj. CWgij is not available on every platform; porting it requires a small amount of assembly programming which has not been done for all the targets supported by gcj.

The primary argument to CWgij is the name of a class or, with CW-jar, a jar file. Options before this argument are interpreted by CWgij; remaining options are passed to the interpreted program.

If a class name is specified and this class does not have a CWmain method with the appropriate signature (a CWstatic void method with a CWString[] as its sole argument), then CWgij will print an error and exit.

If a jar file is specified then CWgij will use information in it to determine which class' CWmain method will be invoked.

CWgij will invoke the CWmain method with all the remaining command-line options.

Note that CWgij is not limited to interpreting code. Because CWlibgcj includes a class loader which can dynamically load shared objects, it is possible to give CWgij the name of a class which has been compiled and put into a shared library on the class path.

-cp path

-classpath path

Set the initial class path. The class path is used for finding class and resource files. If specified, this option overrides the CWCLASSPATH environment variable. Note that this option is ignored if CW-jar is used.

-Dname[=value]

This defines a system property named name with value value. If value is not specified then it defaults to the empty string. These system properties are initialized at the program's startup and can be retrieved at runtime using the CWjava.lang.System.getProperty method.

-ms=number

Equivalent to CW-Xms.

-mx=number

Equivalent to CW-Xmx.

-noverify

Do not verify compliance of bytecode with the VM specification. In addition, this option disables type verification which is otherwise performed on BC-ABI compiled code.

-X

-Xargument

Supplying CW-X by itself will cause CWgij to list all the supported CW-X options. Currently these options are supported:

-Xmssize

Set the initial heap size.

-Xmxsize

Set the maximum heap size.

-Xsssize

Set the thread stack size. Unrecognized CW-X options are ignored, for compatibility with other runtimes.

-jar

This indicates that the name passed to CWgij should be interpreted as the name of a jar file, not a class.

--help

-?

Print help, then exit.

--showversion

Print version number and continue.

--fullversion

Print detailed version information, then exit.

--version

Print version number, then exit.

-verbose

-verbose:class

Each time a class is initialized, print a short message on standard error.

CWgij also recognizes and ignores the following options, for compatibility with existing application launch scripts: CW-client, CW-server, CW-hotspot, CW-jrockit, CW-agentlib, CW-agentpath, CW-debug, CW-d32, CW-d64, CW-javaagent, CW-noclassgc, CW-verify, and CW-verifyremote.

gcc(1), gcj(1), gcjh(1), jv-scan(1), jcf-dump(1), gfdl(7), and the Info entries for gcj and gcc. gcc(1), gcj(1), gcjh(1), jv-scan(1), jcf-dump(1), gfdl(7), and the Info entries for gcj and gcc.

Copyright (c) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with the Invariant Sections being GNU General Public License, the Front-Cover texts being (a) (see below), and with the Back-Cover Texts being (b) (see below). A copy of the license is included in the man page gfdl(7).

(a) The FSF's Front-Cover Text is:

     A GNU Manual

(b) The FSF's Back-Cover Text is:

     You have freedom to copy and modify this GNU Manual, like GNU
     software.  Copies published by the Free Software Foundation raise
     funds for GNU development.