From 8082e4be668d586a1ac2c7c05eb710841b6b6202 Mon Sep 17 00:00:00 2001 From: tromey Date: Sat, 16 Jul 2005 00:31:27 +0000 Subject: Initial revision git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@102075 138bc75d-0d04-0410-961f-82ee72b054a4 --- .../vm/reference/gnu/classpath/VMStackWalker.java | 108 +++++++++++++++++++++ .../gnu/classpath/VMSystemProperties.java | 97 ++++++++++++++++++ .../vm/reference/gnu/java/nio/VMPipe.java | 64 ++++++++++++ .../vm/reference/gnu/java/nio/VMSelector.java | 59 +++++++++++ 4 files changed, 328 insertions(+) create mode 100644 libjava/classpath/vm/reference/gnu/classpath/VMStackWalker.java create mode 100644 libjava/classpath/vm/reference/gnu/classpath/VMSystemProperties.java create mode 100644 libjava/classpath/vm/reference/gnu/java/nio/VMPipe.java create mode 100644 libjava/classpath/vm/reference/gnu/java/nio/VMSelector.java (limited to 'libjava/classpath/vm/reference/gnu') diff --git a/libjava/classpath/vm/reference/gnu/classpath/VMStackWalker.java b/libjava/classpath/vm/reference/gnu/classpath/VMStackWalker.java new file mode 100644 index 00000000000..28e4ce36443 --- /dev/null +++ b/libjava/classpath/vm/reference/gnu/classpath/VMStackWalker.java @@ -0,0 +1,108 @@ +/* VMStackWalker.java -- Reference implementation of VM hooks for stack access + Copyright (C) 2005 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.classpath; + +/** + * This class provides access to the classes on the Java stack + * for reflection and security purposes. + * + *

+ * This class is only available to privileged code (i.e., code loaded + * by the bootstrap loader). + * + * @author John Keiser + * @author Eric Blake + * @author Archie Cobbs + */ +public final class VMStackWalker +{ + /** + * Get a list of all the classes currently executing methods on the + * Java stack. getClassContext()[0] is the class associated + * with the currently executing method, i.e., the method that called + * VMStackWalker.getClassContext() (possibly through + * reflection). So you may need to pop off these stack frames from + * the top of the stack: + *

+ * + * @return an array of the declaring classes of each stack frame + */ + public static native Class[] getClassContext(); + + /** + * Get the class associated with the method invoking the method + * invoking this method, or null if the stack is not + * that deep (e.g., invoked via JNI invocation API). This method + * is an optimization for the expression getClassContext()[1] + * and should return the same result. + * + *

+ * VM implementers are encouraged to provide a more efficient + * version of this method. + */ + public static Class getCallingClass() + { + Class[] ctx = getClassContext(); + if (ctx.length < 3) + return null; + return ctx[2]; + } + + /** + * Get the class loader associated with the Class returned by + * getCallingClass(), or null if no + * such class exists or it is the boot loader. This method is an optimization + * for the expression getClassContext()[1].getClassLoader() + * and should return the same result. + * + *

+ * VM implementers are encouraged to provide a more efficient + * version of this method. + */ + public static ClassLoader getCallingClassLoader() + { + Class[] ctx = getClassContext(); + if (ctx.length < 3) + return null; + return ctx[2].getClassLoader(); + } +} + diff --git a/libjava/classpath/vm/reference/gnu/classpath/VMSystemProperties.java b/libjava/classpath/vm/reference/gnu/classpath/VMSystemProperties.java new file mode 100644 index 00000000000..e7cb91fde70 --- /dev/null +++ b/libjava/classpath/vm/reference/gnu/classpath/VMSystemProperties.java @@ -0,0 +1,97 @@ +/* VMSystemProperties.java -- Allow the VM to set System properties. + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.classpath; + +import java.util.Properties; + +class VMSystemProperties +{ + /** + * Get the system properties. This is done here, instead of in System, + * because of the bootstrap sequence. Note that the native code should + * not try to use the Java I/O classes yet, as they rely on the properties + * already existing. The only safe method to use to insert these default + * system properties is {@link Properties#setProperty(String, String)}. + * + *

These properties MUST include: + *

+ *
java.version
Java version number + *
java.vendor
Java vendor specific string + *
java.vendor.url
Java vendor URL + *
java.home
Java installation directory + *
java.vm.specification.version
VM Spec version + *
java.vm.specification.vendor
VM Spec vendor + *
java.vm.specification.name
VM Spec name + *
java.vm.version
VM implementation version + *
java.vm.vendor
VM implementation vendor + *
java.vm.name
VM implementation name + *
java.specification.version
Java Runtime Environment version + *
java.specification.vendor
Java Runtime Environment vendor + *
java.specification.name
Java Runtime Environment name + *
java.class.version
Java class version number + *
java.class.path
Java classpath + *
java.library.path
Path for finding Java libraries + *
java.io.tmpdir
Default temp file path + *
java.compiler
Name of JIT to use + *
java.ext.dirs
Java extension path + *
os.name
Operating System Name + *
os.arch
Operating System Architecture + *
os.version
Operating System Version + *
file.separator
File separator ("/" on Unix) + *
path.separator
Path separator (":" on Unix) + *
line.separator
Line separator ("\n" on Unix) + *
user.name
User account name + *
user.home
User home directory + *
user.dir
User's current working directory + *
gnu.cpu.endian
"big" or "little" + *
+ * + * @param p the Properties object to insert the system properties into + */ + static native void preInit(Properties properties); + + /** + * Here you get a chance to overwrite some of the properties set by + * the common SystemProperties code. For example, it might be + * a good idea to process the properties specified on the command + * line here. + */ + static void postInit(Properties properties) + { + } +} diff --git a/libjava/classpath/vm/reference/gnu/java/nio/VMPipe.java b/libjava/classpath/vm/reference/gnu/java/nio/VMPipe.java new file mode 100644 index 00000000000..11dd2aa7b4b --- /dev/null +++ b/libjava/classpath/vm/reference/gnu/java/nio/VMPipe.java @@ -0,0 +1,64 @@ +/* VMPipe.java -- Reference implementation for VM hooks used by PipeImpl + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.nio; + +import java.io.IOException; +import java.nio.channels.spi.SelectorProvider; +import gnu.classpath.Configuration; + +/** + * This class contains the native methods for gnu.java.nio.PipeImpl + * As such, it needs help from the VM. + * + * @author Patrik Reali + */ +final class VMPipe +{ + + static + { + // load the shared library needed for native methods. + if (Configuration.INIT_LOAD_LIBRARY) + { + System.loadLibrary ("javanio"); + } + } + + static native void init(PipeImpl self, SelectorProvider provider) + throws IOException; +} diff --git a/libjava/classpath/vm/reference/gnu/java/nio/VMSelector.java b/libjava/classpath/vm/reference/gnu/java/nio/VMSelector.java new file mode 100644 index 00000000000..488132d24c2 --- /dev/null +++ b/libjava/classpath/vm/reference/gnu/java/nio/VMSelector.java @@ -0,0 +1,59 @@ +/* VMSelector.java -- + Copyright (C) 2004 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.nio; + +import gnu.classpath.Configuration; +import java.io.IOException; + +public final class VMSelector +{ + static + { + // load the shared library needed for native methods. + if (Configuration.INIT_LOAD_LIBRARY) + { + System.loadLibrary ("javanio"); + } + } + + // A timeout value of 0 means block forever. + static native int select (int[] read, int[] write, + int[] except, long timeout) + throws IOException; + +} -- cgit v1.2.3