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NAME

kaffe − a virtual machine to execute Java(tm) bytecode

SYNOPSIS

The provided options are passed to kaffe virtual machine. Available options are described in the section OPTIONS. The provided arguments are passed to the main function of the called class.

DESCRIPTION

kaffe executes Java(tm) bytecode, either as a pure bytecode interpreter, or by doing "just−in−time" code conversion from the abstract code to the host machine’s native code.

The specified classname has to be a fully−qualified classname (e.g. foo.bar.ClassName). If kaffe is used with the −jar flag, the class to execute is determined through the manifest file included in the specified Jar−File filename.

kaffe searches for needed classes during program execution on the bootclasspath (see −Xbootclasspath options) and the classpath given by the user (see the −classpath option).

OPTIONS

The options for the kaffe command are divided into general options (available on all kaffe installations), options provided for compatibility reasons and further options which are depending on the configuration during compilation of kaffe.

GENERAL OPTIONS
These options are available on all kaffe installations.

−version

Print the version number.

−fullversion

Same as −version plus compile date and flags, changelog head.

−ss size

Set the maximum stack size to size.

−mx size

Set the maximum heap size to size. Kilobytes are indicated by the letters k or K and megabytes by m or M.

−ms size

Set the initial heap size to size. Kilobytes are indicated by the letters k or K and megabytes by m or M.

−as size

Set the heap increment size to size

−classpath path

Set the path which is searched for compiled classes. This can be a list of directories and Jar−Files containing compiled classes. The entries in this list are separated by colons (:).

−addclasspath path

Appends the given path to the current classpath setting. Multiple instances of this flag may be given.

−Xbootclasspath: bootclasspath

Set the bootclasspath to the given path.

−Xbootclasspath/a: bootclasspath

Appends the given path to the bootclasspath.

−Xbootclasspath/p: bootclasspath

Prepends the given path to the bootclasspath.

−Dproperty=value

Set a property to a given value.

−verifyremote *

Verify all classes not loaded from the bootclasspath. This is the default behavior.

−verify *

Verify all classes.

−noverify

Do not verify any classes.

−noclassgc

Disable class garbage collection.

−verbosegc

Print message during garbage collection.

−v, −verbose

Enable verbose output.

−verbosemem

Print detailed memory allocation statistics.

−verbosejit

Print message during JIT code generation.

−verbosecall

Print detailed call flow information.

−nodeadlock

Disable deadlock detection.

−debug *

Trace method calls.

−noasyncgc *

Do not garbage collect asynchronously.

−cs, −checksource *

Check source against class files.

−oss * size

Maximum stack size.

−debug−fd descriptor

Descriptor to send debug info to.

−jar file

Executes a Java(tm) program which is provided by the given Jar−File file.

* Option currently ignored.

COMPATIBILITY OPTIONS
These options are provided for compatibility reasons with other Java(tm) runtime environments.
−Xss size

Maximum native stack size (see −ss).

−Xmx size

Maximum heap size (see −mx).

−Xms size

Initial heap size (see −ms).

−cp path

Set classpath (see −classpath).

FURTHER OPTIONS
Further options may be available based on the configuration of kaffe during compilation. To get a complete list of options available in your kaffe installation type kaffe −−help on the commandline.

−Xxprof

Enable cross language profiling.

−Xxprof_syms file

Name of the profiling symbols file [Default: kaffe−jit−symbols.s].

−Xxprof_gmon file

Base name for gmon files [Default: xgmon.out]

−Xxdebug_file file

Name of the debugging symbols file.

−Xfeedback

The file name to write feedback data to.

−vmstats flag{,flag}

Print VM statistics. Set flag=all for all

−Xnative−big−math

Use GMP for faster, native bignum calculations.

−vmdebug flag{,flag}

Enable VM debugging. Set “−vmdebug list” for a list.

−Xkaffe−xlib−awt

Use Kaffe’s Xlib AWT backend.

−Xkaffe−qt−awt

Use Kaffe’s Qt2/3/Embedded AWT backend.

−Xkaffe−nanox−awt

Use Kaffe’s Nano−X AWT backend.

ENVIRONMENT

CLASSPATH

A colon−separated list of directories and Jar−Files in which to search for .class files. The entries have to be separated by colons (:).

KAFFEHOME

Base directory of kaffe installation.

LD_LIBRARY_PATH

A colon−separated list of directories in which to search for libraries. See ld.so(1) for details. This needs to be set if Kaffe’s shared libraries are installed in a location not part of the dynamic loader’s default search path.

FILES

/usr/lib/kaffe/pthreads-profile/share/kaffe/kafferc

System−wide shell script read by kaffe script (optional).

${HOME}/.kafferc

Per−user shell script read by kaffe script (optional).

DIAGNOSTICS

Not documented yet.

NOTES

Java is a registered trademark of Sun Microsystems, Inc.

Kaffe is available from various sites, the primary one being <http://www.kaffe.org: http://www.kaffe.org>.

There are several mailing lists for Kaffe:
kaffe [AT] kaffe.org

General Kaffe discussions

kaffe−announce [AT] kaffe.org

Kaffe related announcements

BUGS

See the file FAQ.Known−Bugs for an updated list.

AUTHOR

Kaffe was originally written by Tim Wilkinson, 1996. Many others contributed to the Kaffe project. They are listed in the source distribution’s AUTHORS file.

COPYING

Kaffe is distributed under the GNU GPL. For full details, see the file license.terms in the source distribution for full details.

The included DOM bindings are published under the W3C Software Copyright Notice and License. For full details, see the file license−w3c.terms in the source distribution for full details.

SEE ALSO

jikes, a fast Java(tm) compiler

gjdoc, the GNU javadoc tool