/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package java.lang;
import org.jnode.vm.scheduler.VmThread;
import org.jnode.vm.scheduler.VmProcessor;
import org.jnode.vm.VmStackFrame;
import org.jnode.annotation.MagicPermission;
import org.jnode.vm.classmgr.VmMethod;
import org.jnode.vm.classmgr.VmType;
import org.jnode.vm.classmgr.VmInstanceField;
import org.vmmagic.unboxed.ObjectReference;
/**
* @author Levente S\u00e1ntha
* @see Throwable
*/
@MagicPermission
class NativeThrowable {
private static int BACKTRACE_OFFSET = ((VmInstanceField) VmType.fromClass(Throwable.class).
getField("backtrace")).getOffset();
private static synchronized Throwable fillInStackTrace(Throwable instance){
ObjectReference.fromObject(instance).toAddress().add(BACKTRACE_OFFSET).
store(ObjectReference.fromObject(VmThread.getStackTrace(VmProcessor.current().getCurrentThread())));
return instance;
}
private static int getStackTraceDepth(Throwable instance) {
return ((Object[]) ObjectReference.fromObject(instance).toAddress().add(BACKTRACE_OFFSET).
loadObjectReference().toObject()).length;
}
private static StackTraceElement getStackTraceElement(Throwable instance, int index) {
final VmStackFrame frame = (VmStackFrame) ((Object[]) ObjectReference.fromObject(instance).toAddress().add(BACKTRACE_OFFSET).
loadObjectReference().toObject())[index];
final String location = frame.getLocationInfo();
final int lineNumber = "?".equals(location) ? -1 : Integer.parseInt(location);
final VmMethod method = frame.getMethod();
final VmType<?> vmClass = (method == null) ? null : method.getDeclaringClass();
final String fname = (vmClass == null) ? null : vmClass.getSourceFile();
final String cname = (vmClass == null) ? "<unknown class>" : vmClass.getName();
final String mname = (method == null) ? "<unknown method>" : method.getName();
return new StackTraceElement(cname, mname, fname, method == null || method.isNative() ? -2 : lineNumber);
}
static StackTraceElement[] backTrace2stackTrace(Object[] backtrace) {
final VmStackFrame[] vm_trace = (VmStackFrame[]) backtrace;
final int length = vm_trace.length;
final StackTraceElement[] trace = new StackTraceElement[length];
for(int i = length; i-- > 0; ){
final VmStackFrame frame = vm_trace[i];
final String location = frame.getLocationInfo();
final int lineNumber = "?".equals(location) ? -1 : Integer.parseInt(location);
final VmMethod method = frame.getMethod();
final VmType<?> vmClass = (method == null) ? null : method.getDeclaringClass();
final String fname = (vmClass == null) ? null : vmClass.getSourceFile();
final String cname = (vmClass == null) ? "<unknown class>" : vmClass.getName();
final String mname = (method == null) ? "<unknown method>" : method.getName();
trace[i] = new StackTraceElement(cname, mname, fname, method == null || method.isNative() ? -2 : lineNumber);
}
return trace;
}
}