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gcj System PRoperties documentation (Was: Throwable stack traceprinting again)
Hi,
On Mon, 2002-08-19 at 00:21, Mark Wielaard wrote:
> On Fri, 2002-08-16 at 19:00, Tom Tromey wrote:
> >
> > Unfortunately right now we don't seem to have a nice place to document
> > things like this. I'm not sure that mentioning it in the javadoc is
> > sufficient; I think we should consider pulling out gcj-specific things
> > into the main manual. Do you have the time to add a section to the
> > manual for gcj-specific properties?
>
> How does this look? (Disclaimers: This is the first time I do something
> with texinfo, English is not my native language, etc...)
>
> I started out by making three categories but when I did some research I
> noticed that most of the properties were actually specified in the
> runtime api spec so the GNU Classpath specific properties are now a bit
> empty. But it might grow again when we merge some of the Classpath
> classes (character en/decoders, url factories, Inetaddress, etc).
>
> 2002-08-18 Mark Wielaard <mark@klomp.org>
>
> * gcj.texi: Add chapter about System Properties.
>
> OK to commit if the throwable patch is approved?
> Should it also be reviewed on gcc-patches?
> (The gcj.texi file lives in gcc/java/.)
The Throwable patch has gone in.
Is this documentation patch OK?
(I have CCed gcc-patches now.)
Cheers,
Mark
> Index: gcc/java/gcj.texi
> ===================================================================
> RCS file: /cvs/gcc/gcc/gcc/java/gcj.texi,v
> retrieving revision 1.33
> diff -u -r1.33 gcj.texi
> --- gcc/java/gcj.texi 4 Aug 2002 16:55:06 -0000 1.33
> +++ gcc/java/gcj.texi 18 Aug 2002 22:11:15 -0000
> @@ -130,6 +130,7 @@
> * Invoking rmic:: Generate stubs for Remote Method Invocation.
> * Invoking rmiregistry:: The remote object registry.
> * About CNI:: Description of the Cygnus Native Interface
> +* System Properties:: Modifying runtime behaviour of the libgcj library
> * Resources:: Where to look for more information
> @end menu
>
> @@ -1935,6 +1936,230 @@
>
> @noindent will be added shortly, as will other functions corresponding to JNI@.
>
> +
> +@node System Properties
> +@chapter System Properties
> +
> +The runtime behaviour of the @code{libgcj} library can be modified by setting
> +certain System properties. These properties can be compiled into the program
> +using the @code{-D@var{name}[=@var{value}]} option to @command{gcj} or by
> +setting them explicitly in the program by calling the
> +@code{java.lang.System.setProperty()} method. Some System properties are only
> +used for informational purposes (like giving a version number or a user name).
> +A program can inspect the current value of a property by calling the
> +@code{java.lang.System.getProperty()} method.
> +
> +@menu
> +* Standard Properties:: Standard properties supported by @code{libgcj}
> +* GNU Classpath Properties:: Properties found in Classpath based libraries
> +* libgcj Runtime Properties:: Properties specific to @code{libgcj}
> +@end menu
> +
> +@node Standard Properties
> +@section Standard Properties
> +
> +The following properties are normally found in all implementations of the core
> +libraries for the Java language.
> +
> +@table @gcctabopt
> +
> +@item java.version
> +The @code{libgcj} version number.
> +
> +@item java.vendor
> +The Free Software Foundation, Inc.
> +
> +@item java.vendor.url
> +@uref{http://gcc.gnu.org/java/}.
> +
> +@item java.home
> +The directory where @code{gcj} was installated. Taken from the @code{--prefix}
> +option given to @command{configure}.
> +
> +@item java.class.version
> +The class format version number supported by the libgcj byte code interpreter.
> +(Currently 46.0)
> +
> +@item java.vm.specification.version
> +The Virtual Machine Specification version implemented by @code{libgcj}.
> +(Currently 1.0)
> +
> +@item java.vm.specification.vendor
> +The name of the Virtual Machine specification designer.
> +
> +@item java.vm.specification.name
> +The name of the Virtual Machine specification
> +(Java Virtual Machine Specification).
> +
> +@item java.vm.version
> +The @command{gcj} version number.
> +
> +@item java.vm.vendor
> +The Free Software Foundation, Inc.
> +
> +@item java.vm.name
> +GNU libgcj.
> +
> +@item java.specification.version
> +The Runtime Environment specification version implemented by @code{libgcj}.
> +(Currently set to 1.3)
> +
> +@item java.specification.vendor
> +The Runtime Environment specification designer.
> +
> +@item java.specification.name
> +The name of the Runtime Environment specification
> +(Java Platform API Specification).
> +
> +@item java.class.path
> +The paths (jar files, zip files and directories) used for finding class files.
> +
> +@item java.library.path
> +Directory path used for finding native libraries. Currently not set.
> +
> +@item java.io.tmpdir
> +The directory used to put temporary files in.
> +
> +@item java.compiler
> +Name of the Just In Time compiler to use by the byte code interpreter.
> +Currently not used in @code{libgcj}.
> +
> +@item java.ext.dirs
> +Directories containing jar files with extra libraries. Will be used when
> +resolving classes. Currently not used in @code{libgcj}.
> +
> +@item java.protocol.handler.pkgs
> +A "|" separated list of package names that is used to find classes that
> +implement handlers for @code{java.net.URL}.
> +
> +@item java.rmi.server.codebase
> +A list of URLs that is used by the @code{java.rmi.server.RMIClassLoader}
> +to load classes from.
> +
> +@item jdbc.drivers
> +A list of classnames that will be loaded by the @code{java.sql.DriverManager}
> +when it starts up.
> +
> +@item file.separator
> +The separator used in when directories are included in a filename
> +(normally "/" or "\" ).
> +
> +@item file.encoding
> +The default character encoding used when converting platform native files to
> +unicode (usually 8859_1).
> +
> +@item path.separator
> +The standard separator used when a string contains multiple paths
> +(normally ":" or ";"), the string is usually not a valid character to use
> +in normal directory names.)
> +
> +@item line.separator
> +The default line separator used on the platform (normally "\n", "\r"
> +or a combination of those two characters).
> +
> +@item policy.provider
> +The classname used for the default policy provider returned by
> +@code{java.security.Policy.getPolicy}.
> +
> +@item user.name
> +The name of the user running the program. Can be the full name, the login name
> +or empty if unknown.
> +
> +@item user.home
> +The default directory to put user specific files in.
> +
> +@item user.dir
> +The current working directory from which the program was started.
> +
> +@item user.language
> +The default language as used by the @code{java.util.Locale} class.
> +
> +@item user.region
> +The default region as used by the @code{java.util.Local} class.
> +
> +@item user.variant
> +The default variant of the language and region local used.
> +
> +@item user.timezone
> +The default timezone as used by the @code{java.util.TimeZone} class.
> +
> +@item os.name
> +The operating system/kernel name that the program runs on.
> +
> +@item os.arch
> +The hardware that we are running on.
> +
> +@item os.version
> +The version number of the operating system/kernel.
> +
> +@item awt.appletWarning
> +The string to display when an untrusted applet is displayed.
> +Returned by @code{java.awt.Window.getWarningString()} when the window is
> +``insecure''.
> +
> +@item awt.toolkit
> +The classname used for initializing the default @code{java.awt.Toolkit}.
> +Defaults to @code{gnu.java.awt.peer.gtk.GtkToolkit}.
> +
> +@end table
> +
> +@node GNU Classpath Properties
> +@section GNU Classpath Properties
> +
> +@code{libgcj} is based on the GNU Classpath (Essential Libraries for Java) a
> +GNU project to create free core class libraries for use with virtual machines
> +and compilers for the Java language. The following properties are common to
> +libraries based on GNU Classpath.
> +
> +@table @gcctabopt
> +
> +@item gcj.dumpobject
> +Enables printing serialization debugging by the @code{java.io.ObjectInput} and
> +@code{java.io.ObjectOutput} classes when set to something else then the empty
> +string. Only used when running a debug build of the library.
> +
> +@end table
> +
> +@node libgcj Runtime Properties
> +@section libgcj Runtime Properties
> +
> +The following properties are specific to the @code{libgcj} runtime and will
> +normally not be found in other core libraries for the java language.
> +
> +@table @gcctabopt
> +
> +@item java.fullversion
> +The combination of @code{java.vm.name} and @code{java.vm.version}.
> +
> +@item java.vm.info
> +Same as @code{java.fullversion}.
> +
> +@item impl.prefix
> +Used by the @code{java.net.DatagramSocket} class when set to something else
> +then the empty string. When set all newly created @code{DatagramSocket}s will
> +try to load a class @code{java.net.[impl.prefix]DatagramSocketImpl} instead of
> +the normal @code{java.net.PlainDatagramSocketImpl}.
> +
> +@item gnu.gcj.runtime.NameFinder.demangle
> +Whether names in a stack trace should be demangled. Defaults to true.
> +
> +@item gnu.gcj.runtime.NameFinder.sanitize
> +Whether calls to initialize exceptions and starting the runtime system
> +should be removed from the stack trace. Only done when names are
> +demangled. Defaults to true.
> +
> +@item gnu.gcj.runtime.NameFinder.remove_unknown
> +Wheter calls to unknown functions (class and method names are unknown)
> +should be removed from the stack trace. Only done when the stack is
> +sanitized. Ignored if this means no stack trace information would be
> +available anymore. Defaults to true.
> +
> +@item gnu.gcj.runtime.NameFinder.use_addr2line
> +Wheter an external process (@command{addr2line} or @command{addr2name.awk})
> +should be used as fallback to convert the addresses to function names when
> +the runtime is unable to do it through @code{dladdr}.
> +
> +@end table
>
>
> @node Resources