Previous: GNU Classpath Properties, Up: System properties [Contents][Index]
The following properties are specific to the libgcj
runtime and will
normally not be found in other core libraries for the java language.
java.fullversion
The combination of java.vm.name
and java.vm.version
.
java.vm.info
Same as java.fullversion
.
impl.prefix
Used by the java.net.DatagramSocket
class when set to something else
then the empty string. When set all newly created DatagramSocket
s will
try to load a class java.net.[impl.prefix]DatagramSocketImpl
instead of
the normal java.net.PlainDatagramSocketImpl
.
gnu.gcj.progname
The class or binary name that was used to invoke the program. This will be
the name of the "main" class in the case where the gij
front end is
used, or the program binary name in the case where an application is compiled
to a native binary.
gnu.gcj.user.realname
The real name of the user, as taken from the password file. This may not always hold only the user’s name (as some sites put extra information in this field). Also, this property is not available on all platforms.
gnu.gcj.runtime.NameFinder.use_addr2line
Whether an external process, addr2line
, should be used to determine
line number information when tracing the stack. Setting this to false
may suppress line numbers when printing stack traces and when using
the java.util.logging infrastructure. However, performance may improve
significantly for applications that print stack traces or make logging calls
frequently.
gnu.gcj.runtime.NameFinder.show_raw
Whether the address of a stack frame should be printed when the line
number is unavailable. Setting this to true
will cause the name
of the object and the offset within that object to be printed when no
line number is available. This allows for off-line decoding of
stack traces if necessary debug information is available. The default
is false
, no raw addresses are printed.
gnu.gcj.runtime.NameFinder.remove_unknown
Whether stack frames for non-java code should be included in a stack
trace. The default value is true
, stack frames for non-java
code are suppressed. Setting this to false
will cause any
non-java stack frames to be printed in addition to frames for the java
code.
gnu.gcj.runtime.VMClassLoader.library_control
This controls how shared libraries are automatically loaded by the built-in class loader. If this property is set to ‘full’, a full search is done for each requested class. If this property is set to ‘cache’, then any failed lookups are cached and not tried again. If this property is set to ‘never’ (the default), then lookups are never done. For more information, See Extensions.
gnu.gcj.runtime.endorsed.dirs
This is like the standard java.endorsed.dirs
, property, but
specifies some extra directories which are searched after the standard
endorsed directories. This is primarily useful for telling
libgcj
about additional libraries which are ordinarily
incorporated into the JDK, and which should be loaded by the bootstrap
class loader, but which are not yet part of libgcj
itself for
some reason.
gnu.gcj.jit.compiler
This is the full path to gcj
executable which should be
used to compile classes just-in-time when
ClassLoader.defineClass
is called. If not set, gcj
will not be invoked by the runtime; this can also be controlled via
Compiler.disable
.
gnu.gcj.jit.options
This is a space-separated string of options which should be passed to
gcj
when in JIT mode. If not set, a sensible default is
chosen.
gnu.gcj.jit.cachedir
This is the directory where cached shared library files are stored. If not set, JIT compilation is disabled. This should never be set to a directory that is writable by any other user.
gnu.gcj.precompiled.db.path
This is a sequence of file names, each referring to a file created by
gcj-dbtool
. These files will be used by libgcj
to
find shared libraries corresponding to classes that are loaded from
bytecode. libgcj
often has a built-in default database; it
can be queried using gcj-dbtool -p
.
Previous: GNU Classpath Properties, Up: System properties [Contents][Index]