From f496b838a1bf589bc537132cf32ee9b05d8de40f Mon Sep 17 00:00:00 2001 From: aph Date: Tue, 3 Dec 2002 13:53:27 +0000 Subject: 2002-12-03 Andrew Haley * java/lang/natClassLoader.cc (_Jv_PrepareCompiledClass): Call _Jv_PushClass. (_Jv_InitNewClassFields): Set protectionDomain and chain = NULL. (_Jv_PopClass): New. (_Jv_PushClass): New. * java/lang/natClass.cc (forName (jstring)): Use a StackTrace to discover the ClassLoader of our caller. (_Jv_CheckArrayStore): Don't check that a class is assignment compatible with Object. * java/lang/natVMTHrowable.cc: Delete. * gnu/gcj/runtime/StackTrace.java: New, partly copied from java.lang.VMThrowable. (StackTrace(), StackTrace(int)): New constructors. (classAt, methodAt, update, methodAtAddress): New methods. (map): New field. * java/lang/VMThrowable.java: Use StackTrace instead of natVMTHrowable. * java/lang/Class.h (getClassLoaderInternal): New. (class Class): Be friendly with _Jv_PopClass and _Jv_PushClass. Be friendly with gnu::gcj::runtime::StackTrace. (Object.chain): New field. * include/java-interp.h (class _Jv_InterpMethod): Be friendly with gnu::gcj::runtime::StackTrace. * gnu/gcj/runtime/natStackTrace.cc: New file. * gnu/gcj/runtime/MethodRef.java: New file. * prims.cc (_Jv_NewObjectArray): Use getClassLoaderInternal() instead of getClassLoader(). * verify.cc (class _Jv_BytecodeVerifier): Likewise. java::lang::VMThrowable. * Makefile.am (core_java_source_files): Add MethodRef.java, StackTrace.java. (nat_source_files): Remove natVMThrowable.cc; add natStackTrace.cc. * Makefile.in: Rebuild. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@59771 138bc75d-0d04-0410-961f-82ee72b054a4 --- libjava/gnu/gcj/runtime/StackTrace.java | 164 ++++++++++++++++++++++++++++++++ 1 file changed, 164 insertions(+) create mode 100644 libjava/gnu/gcj/runtime/StackTrace.java (limited to 'libjava/gnu/gcj/runtime/StackTrace.java') diff --git a/libjava/gnu/gcj/runtime/StackTrace.java b/libjava/gnu/gcj/runtime/StackTrace.java new file mode 100644 index 00000000000..5faaa1495ae --- /dev/null +++ b/libjava/gnu/gcj/runtime/StackTrace.java @@ -0,0 +1,164 @@ +/* gnu.gcj.runtime.StackTrace -- VM support methods for walking the + stack. + Copyright (C) 1998, 1999, 2002 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., 59 Temple Place, Suite 330, Boston, MA +02111-1307 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.gcj.runtime; + +import gnu.gcj.RawData; +import java.util.TreeMap; +import java.util.IdentityHashMap; +import java.util.SortedMap; +import gnu.gcj.runtime.NameFinder; +import java.util.NoSuchElementException; + +/** + * VM dependent state and support methods for walking the stack. + *

+ * This is the version used by libgcj (http://gcc.gnu.org/java/). + * + * @author Mark Wielaard (mark@klomp.org) + * @author Andrew Haley (aph@redhat.com) + */ +public final class StackTrace +{ + /** + * Fill in the stack trace with the top n frames on current + * execution stack. Can return null if the VM does not support + * capturing the VM execution state. + * + * @see Throwable#fillInStackTrace() + */ + public StackTrace(int n) + { + fillInStackTrace(n, 1); + } + + /** + * Fill in the stack trace with state of the entire execution stack, + * starting from frame offset. Can return null if the + * VM does not support capturing the VM execution state. + * + * This can be very expensive. If you only want part of the stack, + * see Throwable.fillInStackTrace(int) + * + * @see Throwable#fillInStackTrace() + */ + public StackTrace() + { + int n = 64; + + do + { + n *= 4; + fillInStackTrace(n, 1); + } + while (len >= n); + } + + /** + * Return the class containing the execution point represented by + * the Nth frame down the stack. The zeroth frame represents the + * top of the stack, which is the method that called classAt(). + * + * If the Nth frame down the stack was not create by a method + * invocation, return null. + * + * It is not necessary to call fillInStackTrace() with + * a size greater than N before calling this method; if the current + * stack trace is insufficiently large, it will be expanded as + * required. This requires some caution if + * fillInStackTrace() is called from a different + * invocation to the one that calls classAt(). + * classAt() will not call fillInStackTrace() unless N + * is greater than the current length. + * + */ + public native Class classAt(int n); + + /** + * Return the name of the method containing the execution point + * represented by the Nth frame down the stack. The zeroth frame + * represents the top of the stack, which is the method that called + * classAt(). + * + * If the Nth frame down the stack was not create by a method + * invocation, return null. + * + * It is not necessary to call fillInStackTrace() with + * a size greater than N before calling this method; if the current + * stack trace is insufficiently large, it will be expanded as + * required. This requires some caution if + * fillInStackTrace() is called from a different + * invocation to the one that calls classAt(). + * classAt() will not call fillInStackTrace() unless N + * is greater than the current length. + * + */ + public native String methodAt(int n); + + /** + * Return the length of this stack trace. + * + */ + public int length () + { + return len; + } + + private static native void update(); + private static MethodRef methodAtAddress(RawData addr) + { + update(); + synchronized (map) + { + return (MethodRef) map.get (addr); + } + } + + gnu.gcj.RawData stackTraceAddrs() + { + return addrs; + } + + private native void fillInStackTrace(int n, int offset); + + private static native MethodRef getCompiledMethodRef(RawData addr); + private static IdentityHashMap map = new IdentityHashMap(); + + private gnu.gcj.RawData addrs; + private int len; +} -- cgit v1.2.3