/*
* Copyright (c) 2014 Oracle and/or its affiliates. All rights reserved. This
* code is released under a tri EPL/GPL/LGPL license. You can use it,
* redistribute it and/or modify it under the terms of the:
*
* Eclipse Public License version 1.0
* GNU General Public License version 2
* GNU Lesser General Public License version 2.1
*/
package org.jruby.truffle.runtime.backtrace;
import com.oracle.truffle.api.frame.FrameDescriptor;
import com.oracle.truffle.api.frame.MaterializedFrame;
import com.oracle.truffle.api.source.NullSourceSection;
import com.oracle.truffle.api.source.SourceSection;
import org.jruby.truffle.nodes.CoreSourceSection;
import org.jruby.truffle.runtime.RubyContext;
import org.jruby.truffle.runtime.control.TruffleFatalException;
import org.jruby.truffle.runtime.core.RubyBasicObject;
import org.jruby.truffle.runtime.core.RubyException;
import java.util.ArrayList;
import java.util.List;
public class MRIBacktraceFormatter implements BacktraceFormatter {
@Override
public String[] format(RubyContext context, RubyException exception, Backtrace backtrace) {
try {
final List<Activation> activations = backtrace.getActivations();
final ArrayList<String> lines = new ArrayList<>();
if (activations.isEmpty()) {
lines.add(String.format("%s (%s)", exception.getMessage(), exception.getLogicalClass().getName()));
} else {
lines.add(formatInLine(activations, exception));
for (int n = 1; n < activations.size(); n++) {
lines.add(formatFromLine(activations, n));
}
}
return lines.toArray(new String[lines.size()]);
} catch (Exception e) {
throw new TruffleFatalException("Exception while trying to format a Ruby call stack", e);
}
}
private static String formatInLine(List<Activation> activations, RubyException exception) {
final StringBuilder builder = new StringBuilder();
final SourceSection sourceSection = activations.get(0).getCallNode().getEncapsulatingSourceSection();
final SourceSection reportedSourceSection;
final String reportedName;
if (sourceSection instanceof CoreSourceSection) {
reportedSourceSection = nextUserSourceSection(activations, 1);
reportedName = ((CoreSourceSection) sourceSection).getMethodName();
} else {
reportedSourceSection = sourceSection;
reportedName = reportedSourceSection.getIdentifier();
}
if (reportedSourceSection == null) {
throw new IllegalStateException("Call node has no encapsulating source section");
}
if (reportedSourceSection.getSource() == null) {
throw new IllegalStateException("Call node source section " + reportedSourceSection + " has no source");
}
builder.append(reportedSourceSection.getSource().getName());
builder.append(":");
builder.append(reportedSourceSection.getStartLine());
builder.append(":in `");
builder.append(reportedName);
builder.append("'");
if (exception != null) {
builder.append(": ");
builder.append(exception.getMessage());
builder.append(" (");
builder.append(exception.getLogicalClass().getName());
builder.append(")");
}
return builder.toString();
}
private static String formatFromLine(List<Activation> activations, int n) {
return "\tfrom " + formatCallerLine(activations, n);
}
public static String formatCallerLine(List<Activation> activations, int n) {
final SourceSection sourceSection = activations.get(n).getCallNode().getEncapsulatingSourceSection();
final SourceSection reportedSourceSection;
final String reportedName;
if (sourceSection instanceof CoreSourceSection) {
reportedSourceSection = activations.get(n + 1).getCallNode().getEncapsulatingSourceSection();
reportedName = ((CoreSourceSection) sourceSection).getMethodName();
} else {
reportedSourceSection = sourceSection;
reportedName = sourceSection.getIdentifier();
}
final StringBuilder builder = new StringBuilder();
if (reportedSourceSection instanceof NullSourceSection) {
builder.append("NullSourceSection");
} else {
builder.append(reportedSourceSection.getSource().getName());
builder.append(":");
builder.append(reportedSourceSection.getStartLine());
}
builder.append(":in `");
builder.append(reportedName);
builder.append("'");
return builder.toString();
}
private static SourceSection nextUserSourceSection(List<Activation> activations, int n) {
while (true) {
SourceSection sourceSection = activations.get(n).getCallNode().getEncapsulatingSourceSection();
if (!(sourceSection instanceof CoreSourceSection)) {
return sourceSection;
}
n++;
}
}
}